/* Crystalum - CSS Styles */

/* ===== CSS VARIABLES ===== */
:root {
    /* Color Palette */
    --bg-primary: #F5F7FA;           /* Светло-серый с синим отливом */
    --accent-primary: #2E5C92;       /* Глубокий сапфирово-синий */
    --accent-secondary: #7BC8A4;     /* Нефритово-зеленый */
    --text-primary: #1E293B;         /* Графитово-синьо-черный */
    --accent-gold: #C89B3C;          /* Золотисто-бурштиновый */
    --bg-white: #FFFFFF;             /* Чистый белый */
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(30, 41, 59, 0.1);
    --shadow-md: 0 4px 8px rgba(30, 41, 59, 0.15);
    --shadow-lg: 0 8px 16px rgba(30, 41, 59, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

h1 {
    font-size: 2.5rem;
    color: var(--accent-primary);
}

h2 {
    font-size: 2rem;
    color: var(--accent-primary);
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-secondary);
}

ul, ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

li {
    margin-bottom: var(--spacing-xs);
}

/* ===== LAYOUT ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== BUTTONS ===== */
.btn-primary {
    display: inline-block;
    background-color: var(--accent-gold);
    color: var(--bg-white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: #B8860B;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--bg-white);
}

.btn-secondary {
    display: inline-block;
    background-color: transparent;
    color: var(--accent-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--accent-primary);
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-secondary:hover {
    background-color: var(--accent-primary);
    color: var(--bg-white);
    transform: translateY(-2px);
}

.btn-accept {
    background-color: var(--accent-secondary);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.btn-accept:hover {
    background-color: #6AB394;
}

/* ===== COOKIE POPUP ===== */
.cookie-popup {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    background: linear-gradient(135deg, #2D3748 0%, #4A5568 100%);
    color: var(--bg-white);
    padding: var(--spacing-lg);
    z-index: 10000;
    transition: all var(--transition-normal);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    border: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0;
    visibility: hidden;
}

.cookie-popup.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

.cookie-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.cookie-content p {
    margin: 0;
    flex: 1;
}

.cookie-content a {
    color: var(--accent-secondary);
}

/* ===== HEADER ===== */
.header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    transition: transform var(--transition-fast);
}

.nav-logo a:hover .logo-icon {
    transform: scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    gap: 10px;
}

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
    background-color: rgba(46, 92, 146, 0.1);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-primary) 100%);
    padding: var(--spacing-xxl) 0;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    color: #64748B;
}

.hero-image {
    text-align: center;
}

.hero-image svg {
    max-width: 50%;
    height: auto;
    filter: drop-shadow(var(--shadow-md));
}

.hero-image img {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(var(--shadow-md));
}

/* ===== PAGE HEADER ===== */
.page-header {
    background:var(--bg-primary);
    color: var(--bg-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.page-header h1 {
  
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    color: #64748B;
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.features h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    background-color: var(--bg-primary);
    transition: transform var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

/* ===== ABOUT PREVIEW ===== */
.about-preview {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.about-content {
    display: grid;
  
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text h2 {
    margin-bottom: var(--spacing-md);
}

.about-text p {
    margin-bottom: var(--spacing-md);
    color: #64748B;
}

.about-image {
    text-align: center;
}

/* ===== CARDS ===== */
.card {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* ===== CLASSIFICATION STYLES ===== */
.classification-overview {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-white);
}

.classification-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    
    border-radius: var(--border-radius-lg);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    color: #64748B;
    font-weight: 500;
}

.mineral-classes {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.class-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.class-card {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.class-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.class-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--bg-primary);
}

.class-icon {
    flex-shrink: 0;
}

.class-header h3 {
    margin: 0;
    color: var(--accent-primary);
}

.class-formula {
    background-color: var(--accent-gold);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
}

.class-content p {
    margin-bottom: var(--spacing-sm);
}

.class-content strong {
    color: var(--accent-primary);
}

/* ===== CRYSTAL PROPERTIES ===== */
.properties-overview {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-white);
}

.physical-properties {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.property-section {
    margin-bottom: var(--spacing-xxl);
}

.property-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.property-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.property-visual {
    text-align: center;
}

.mohs-scale {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-top: var(--spacing-lg);
}

.scale-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.scale-item {
    text-align: center;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-md);
    transition: transform var(--transition-fast);
}

.scale-item:hover {
    transform: scale(1.05);
}

.scale-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.scale-mineral {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.scale-description {
    font-size: 0.9rem;
    color: #64748B;
}

.luster-types {
    margin-top: var(--spacing-lg);
}

.luster-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.luster-card {
    background-color: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border-left: 4px solid var(--accent-secondary);
}

.luster-card h4 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.example {
    display: block;
    font-style: italic;
    color: var(--accent-gold);
    margin-top: var(--spacing-xs);
}

.transparency-types {
    display: grid;
    gap: var(--spacing-md);
}

.transparency-item {
    padding: var(--spacing-md);
    background-color: var(--bg-white);
    border-radius: var(--border-radius-md);
    border-left: 4px solid var(--accent-primary);
}

.transparency-item h4 {
    margin-bottom: var(--spacing-xs);
}

/* ===== CRYSTAL SYSTEMS ===== */
.crystal-systems {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.system-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: transform var(--transition-normal);
}

.system-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.system-card h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

/* ===== IDENTIFICATION STYLES ===== */
.identification-intro {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-white);
}

.safety-warning {
    background-color: #FEF3C7;
    border: 2px solid #F59E0B;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.safety-warning h3 {
    color: #D97706;
    margin-bottom: var(--spacing-sm);
}

.physical-tests,
.chemical-tests,
.optical-tests {
    padding: var(--spacing-xxl) 0;
}

.physical-tests {
    background-color: var(--bg-primary);
}

.chemical-tests {
    background-color: var(--bg-white);
}

.optical-tests {
    background-color: var(--bg-primary);
}

.test-section {
    margin-bottom: var(--spacing-xxl);
}

.test-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.test-info h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.test-info h4 {
    color: var(--accent-secondary);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.warning-box {
    background-color: #FEE2E2;
    border: 2px solid #EF4444;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.warning-box h3 {
    color: #DC2626;
    margin-bottom: var(--spacing-sm);
}

.acid-tests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.acid-test-card {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border-top: 4px solid var(--accent-primary);
    box-shadow: var(--shadow-sm);
}

.acid-test-card h4 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.flame-colors {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.flame-color-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.color-sample {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid var(--text-primary);
}

.uv-examples {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.uv-example {
    background-color: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    text-align: center;
}

.uv-example h4 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

/* ===== IDENTIFICATION GUIDE ===== */
.identification-guide {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.steps-container {
    display: grid;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.step {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-normal);
}

.step:hover {
    transform: translateX(10px);
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: var(--accent-primary);
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

/* ===== GALLERY STYLES ===== */
.gallery-filters {
    padding: var(--spacing-lg) 0;
    background-color: var(--bg-white);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.filter-btn {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--accent-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--accent-primary);
    color: var(--bg-white);
}

.gallery-grid {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.gallery-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.gallery-item {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.gallery-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.gallery-image svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-info {
    padding: var(--spacing-lg);
}

.gallery-info h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.mineral-class {
    color: var(--accent-secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.mineral-properties {
    background-color: var(--bg-primary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

.mineral-description {
    color: #64748B;
    font-size: 0.95rem;
}

.gallery-info-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.collection-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.stat {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: #64748B;
    font-weight: 500;
}

/* ===== ARTICLES STYLES ===== */
.featured-article {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.featured-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.featured-label {
    background-color: var(--accent-gold);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.featured-text h2 {
    font-size: 2.2rem;
    margin-bottom: var(--spacing-md);
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-size: 0.9rem;
    color: #64748B;
}

.article-date,
.article-category,
.article-read-time {
    position: relative;
}

.article-date::after,
.article-category::after {
     
    margin-left: var(--spacing-md);
    color: var(--accent-secondary);
}

.articles-grid {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.articles-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.article-card {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.article-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.article-image svg {
    width: 100%;
    height: 100%;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-content {
    padding: var(--spacing-lg);
}

.article-category {
    background-color: var(--accent-secondary);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
   
}

.article-content h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.article-content p {
    color: #64748B;
    margin-bottom: var(--spacing-md);
}

.categories-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.category-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: transform var(--transition-normal);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.category-icon {
    margin-bottom: var(--spacing-md);
}

.category-card h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.article-count {
    display: inline-block;
    background-color: var(--accent-gold);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

.newsletter-section {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: var(--bg-white);
    text-align: center;
}

.newsletter-content h2 {
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
}

.newsletter-content p {
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form .form-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-sm);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
}

.form-note {
    font-size: 0.9rem;
    opacity: 0.8;
    margin: 0;
}

/* ===== CONTACT STYLES ===== */
.contact-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
}

.contact-info h2 {
    margin-bottom: var(--spacing-xl);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.contact-icon {
    background-color: var(--bg-primary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
    flex-shrink: 0;
}

.contact-details h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-details p {
    margin: 0;
    color: #64748B;
}

.contact-details a {
    color: var(--accent-primary);
    text-decoration: none;
}

.contact-details a:hover {
    color: var(--accent-secondary);
}

.social-media {
    margin-top: var(--spacing-xl);
}

.social-media h3 {
    margin-bottom: var(--spacing-md);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    text-decoration: none;
    color: var(--text-primary);
}

.social-link:hover {
    background-color: var(--accent-primary);
    color: var(--bg-white);
    transform: translateX(5px);
}

.contact-form-section h2 {
    margin-bottom: var(--spacing-xl);
}

/* ===== FORMS ===== */
.contact-form,
.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-sm);
    border: 2px solid #E2E8F0;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.form-group.checkbox-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-weight: normal;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--accent-primary);
    border-radius: var(--border-radius-sm);
    position: relative;
    flex-shrink: 0;
    background-color: var(--bg-white);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    color: var(--bg-white);
    font-weight: bold;
    font-size: 14px;
    line-height: 1;
}

.error-message {
    color: #EF4444;
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
    display: none;
}

.error-message.show {
    display: block;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #EF4444;
}

/* ===== MAP SECTION ===== */
.map-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.map-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.map-placeholder {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.map-info {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.map-info h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.map-info h3:first-child {
    margin-top: 0;
}

.map-info p {
    margin-bottom: var(--spacing-sm);
    color: #64748B;
}

/* ===== FAQ SECTION ===== */
.faq-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.faq-item {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-normal);
}

.faq-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.faq-item h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.faq-item p {
    color: #64748B;
    margin: 0;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--text-primary);
    color: var(--bg-white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
    color: #CBD5E1;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--accent-secondary);
}

.footer-section p {
    color: #CBD5E1;
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid #475569;
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-links a {
    color: #CBD5E1;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-secondary);
}

.footer-bottom p {
    margin: 0;
    color: #94A3B8;
    font-size: 0.9rem;
}
@media (max-width: 1082px) {
/* Navigation */
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: var(--spacing-lg) 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: var(--spacing-sm) 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    /* Typography */
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hero-text h1 {
        font-size: 2.2rem;
    }
    
    
    
    /* Layout */
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Hero */
    .hero {
        padding: var(--spacing-xl) 0;
        min-height: auto;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    /* Grids */
    .features-grid,
    .class-grid,
    .systems-grid,
    .gallery-items,
    .articles-container {
        grid-template-columns: 1fr;
    }
    
    .scale-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    /* Content layouts */
    .about-content,
    .featured-content,
    .contact-content,
    .property-content,
    .test-content,
    .map-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Forms */
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form .form-group {
        flex-direction: column;
    }
    
    /* Cookie popup */
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    /* Footer */
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    /* Steps */
    .step {
        flex-direction: column;
        text-align: center;
    }
    
    /* Stats */
    .classification-stats,
    .collection-stats {
        grid-template-columns: 1fr;
    }
    
    /* Spacing adjustments */
    .page-header,
    .hero,
    .features,
    .about-preview,
    .mineral-classes,
    .physical-properties,
    .crystal-systems,
    .identification-guide,
    .gallery-grid,
    .articles-grid,
    .contact-section,
    .map-section,
    .faq-section {
        padding: var(--spacing-xl) 0;
    }
}

@media (max-width: 480px) {
    /* Further mobile optimizations */
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-text h1 {
        font-size: 1.8rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: var(--spacing-sm);
        font-size: 0.9rem;
    }
    
    .scale-grid {
        grid-template-columns: 1fr;
    }
    
    .flame-colors {
        flex-direction: column;
        align-items: center;
    }
    
    .social-links {
        gap: var(--spacing-xs);
    }
}

/* ===== NEW SECTIONS STYLES ===== */

/* Educational Benefits */
.educational-benefits {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-primary);
}

.educational-benefits h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.benefit-item {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal);
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.benefit-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.benefit-item h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

/* Popular Minerals */
.popular-minerals {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.popular-minerals h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.minerals-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.mineral-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: transform var(--transition-normal);
    border: 2px solid transparent;
}

.mineral-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-secondary);
    box-shadow: var(--shadow-lg);
}

.mineral-image {
    margin-bottom: var(--spacing-md);
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mineral-crystal {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-md);
    position: relative;
}

.mineral-crystal.quartz {
    background: linear-gradient(135deg, #E8F4FD, #B3D9F2);
    border: 2px solid var(--accent-primary);
}

.mineral-crystal.calcite {
    background: linear-gradient(135deg, #FFF8DC, #F5DEB3);
    border: 2px solid var(--accent-gold);
}

.mineral-crystal.pyrite {
    background: linear-gradient(135deg, #FFD700, #DAA520);
    border: 2px solid #B8860B;
}

.mineral-card h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.mineral-formula {
    background-color: var(--accent-secondary);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: var(--spacing-sm);
}

.mineral-link {
    color: var(--accent-primary);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.mineral-link:hover {
    color: var(--accent-secondary);
}

/* Learning Path */
.learning-path {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-white) 100%);
}

.learning-path h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.path-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.path-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary));
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.timeline-marker {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
    z-index: 2;
    position: relative;
}

.timeline-content {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    flex: 1;
    transition: transform var(--transition-normal);
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.timeline-content h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    color: #64748B;
    margin-bottom: var(--spacing-md);
}

.timeline-link {
    background-color: var(--accent-gold);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: 500;
    transition: background-color var(--transition-fast);
}

.timeline-link:hover {
    background-color: #B8860B;
    color: var(--bg-white);
}

/* Remove list bullets */
ul {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

/* Only add bullets to content lists, not navigation */
.content ul li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.content ul li::before {
    content: '•';
    color: var(--accent-secondary);
    position: absolute;
    left: 0;
    top: 0;
    font-weight: bold;
}

/* About page specific styles */
.about-content {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.content-text {
    padding-right: var(--spacing-lg);
}

.content-image {
    text-align: center;
}

.content-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
}

.team-section {
    background-color: var(--bg-primary);
    padding: var(--spacing-xxl) 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.team-member {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal);
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.member-avatar {
    margin-bottom: var(--spacing-md);
}

.member-avatar img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 3px solid var(--accent-secondary);
    transition: transform var(--transition-fast);
}

.member-avatar img:hover {
    transform: scale(1.05);
}

.member-role {
    color: var(--accent-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.values-section {
    background-color: var(--bg-white);
    padding: var(--spacing-xxl) 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.value-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.value-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-gold);
    box-shadow: var(--shadow-md);
}

.value-icon {
    margin-bottom: var(--spacing-md);
}

.value-icon img {
    width: 60px;
    height: 60px;
    transition: transform var(--transition-fast);
}

.value-card:hover .value-icon img {
    transform: scale(1.1);
}

.value-card h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

/* Research Section */
.research-section {
    background-color: var(--bg-primary);
    padding: var(--spacing-xxl) 0;
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.research-card {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal);
    border-top: 4px solid var(--accent-secondary);
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.research-icon {
    margin-bottom: var(--spacing-md);
}

.research-icon img {
    width: 50px;
    height: 50px;
}

.research-stats {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid #E2E8F0;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: #64748B;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Kazakhstan Minerals Section */
.kazakhstan-minerals {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-primary) 100%);
    padding: var(--spacing-xxl) 0;
}

.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: #64748B;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.6;
}

.minerals-showcase {
    max-width: 1200px;
    margin: 0 auto;
}

.mineral-highlight {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-xl);
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid #E2E8F0;
}

.mineral-highlight:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.mineral-highlight.reverse {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #F8FAFC 100%);
}

.mineral-header {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: var(--bg-white);
    padding: var(--spacing-lg);
    text-align: center;
}

.mineral-header h3 {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.mineral-location {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    font-size: 0.9rem;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.mineral-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
}

.mineral-image-large {
    align-self: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #F8FAFC 0%, var(--bg-primary) 100%);
    border-radius: var(--border-radius-md);
    width: fit-content;
}

.mineral-crystal-large {
    width: 120px;
    height: 120px;
    border-radius: var(--border-radius-lg);
    position: relative;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
    display: block;
}

.mineral-crystal-large:hover {
    transform: scale(1.05);
}

.mineral-crystal-large.altai {
    background: linear-gradient(135deg, #87CEEB, #4682B4, #1E90FF);
    border: 3px solid #4682B4;
}

.mineral-crystal-large.mangyshlak {
    background: linear-gradient(135deg, #DEB887, #CD853F, #8B4513);
    border: 3px solid #CD853F;
}

.mineral-crystal-large.tienshan {
    background: linear-gradient(135deg, #F0F8FF, #E6E6FA, #D8BFD8);
    border: 3px solid #9370DB;
}

.mineral-info {
    flex: 1;
    width: 100%;
}

.mineral-info p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    word-wrap: break-word;
    overflow-wrap: break-word;
    text-align: justify;
}

.mineral-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    list-style: none;
    padding: 0;
}

.mineral-features li {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #F8FAFC 100%);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--accent-secondary);
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    word-wrap: break-word;
}

.mineral-features li:hover {
    background: var(--accent-secondary);
    color: var(--bg-white);
    transform: translateX(5px);
}

/* Responsive design */
@media (max-width: 768px) {
    .mineral-content {
        padding: var(--spacing-md);
    }
    
    .mineral-image-large {
        margin-bottom: var(--spacing-md);
    }
    
    .mineral-features {
        grid-template-columns: 1fr;
    }
    
    .mineral-header h3 {
        font-size: 1.3rem;
    }
    
    .mineral-crystal-large {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 480px) {
    .mineral-image-large {
        margin-bottom: var(--spacing-sm);
        padding: var(--spacing-sm);
    }
    
    .mineral-crystal-large {
        width: 80px;
        height: 80px;
    }
    
    .mineral-content {
        padding: var(--spacing-sm);
    }
}

/* Educational Impact Section */
.educational-impact {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-white) 100%);
    padding: var(--spacing-xxl) 0;
}

.impact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.impact-achievements {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.achievement-item {
    text-align: center;
    padding: var(--spacing-md);
    background-color: var(--bg-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
}

.achievement-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.achievement-label {
    font-size: 0.9rem;
    color: #64748B;
}

.program-list {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.program-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.program-item:hover {
    transform: translateX(5px);
}

.program-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

.program-content h4 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

/* Future Plans Section */
.future-plans {
    background-color: var(--bg-white);
    padding: var(--spacing-xxl) 0;
}

.plans-timeline {
    max-width: 800px;
    margin: var(--spacing-lg) auto 0;
    position: relative;
}

.plans-timeline::before {
    content: '';
    position: absolute;
    left: 80px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary));
}

.plans-timeline .timeline-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.timeline-year {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    flex-shrink: 0;
    z-index: 2;
    position: relative;
    box-shadow: var(--shadow-md);
}

.plans-timeline .timeline-content {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    flex: 1;
    transition: transform var(--transition-normal);
}

.plans-timeline .timeline-content:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.plans-timeline .timeline-content h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

/* Enhanced Identification Tips */
.identification-tips {
    background-color: var(--bg-white);
    padding: var(--spacing-xxl) 0;
}

.identification-tips .section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: #64748B;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.tip-card.enhanced {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border-left: 4px solid var(--accent-secondary);
    margin-bottom: 20px;
}

.tip-card.enhanced:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-left-color: var(--accent-primary);
}

.tip-icon {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.tip-icon img {
    width: 50px;
    height: 50px;
    transition: transform var(--transition-fast);
}

.tip-card.enhanced:hover .tip-icon img {
    transform: scale(1.1);
}

.tip-description {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: #64748B;
}

.tip-details {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid #E2E8F0;
}

.tip-details h4 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tip-list {
    margin-bottom: var(--spacing-md);
}

.tip-list li {
    padding: var(--spacing-xs) 0;
    font-size: 0.9rem;
    color: #64748B;
}

.tip-warning,
.tip-note,
.tip-formula,
.tip-equipment {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
}

.tip-warning {
    background-color: #FEF3C7;
    border-left: 3px solid #F59E0B;
    color: #92400E;
}

.tip-note {
    background-color: #DBEAFE;
    border-left: 3px solid #3B82F6;
    color: #1E40AF;
}

.tip-formula {
    background-color: #F3E8FF;
    border-left: 3px solid #8B5CF6;
    color: #6B21A8;
}

.tip-equipment {
    background-color: #D1FAE5;
    border-left: 3px solid #10B981;
    color: #065F46;
}

/* Additional Methods Section */
.additional-methods {
    margin-top: var(--spacing-xxl);
    padding: var(--spacing-xl);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
}

.additional-methods h3 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--accent-primary);
}

.methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.method-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal);
}

.method-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.method-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.method-content h4 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.method-content p {
    color: #64748B;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Warning Section */
.identification-warning {
    margin-top: var(--spacing-xxl);
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 2px solid #F59E0B;
}

.warning-content h3 {
    text-align: center;
    color: #92400E;
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
}

.warning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.warning-item {
    background-color: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border-left: 4px solid #F59E0B;
    box-shadow: var(--shadow-sm);
}

.warning-item h4 {
    color: #92400E;
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

.warning-item p {
    color: #78350F;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Mobile Responsiveness for new sections */
@media (max-width: 768px) {
    .research-grid {
        grid-template-columns: 1fr;
    }
    
    .mineral-highlight {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .mineral-highlight.reverse {
        grid-template-columns: 1fr;
    }
    
    .impact-content {
        grid-template-columns: 1fr;
    }
    
    .impact-achievements {
        grid-template-columns: 1fr;
    }
    
    .plans-timeline::before {
        left: 40px;
    }
    
    .timeline-year {
        width: 60px;
        height: 60px;
        font-size: 1rem;
    }
    
    .program-item {
        flex-direction: column;
        text-align: center;
    }
    
    .methods-grid {
        grid-template-columns: 1fr;
    }
    
    .method-item {
        flex-direction: column;
        text-align: center;
    }
    
    .warning-grid {
         grid-template-columns: 1fr;
     }
 }
 
 /* Enhanced Identification Intro */
 .identification-intro {
     background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-primary) 100%);
     padding: var(--spacing-xxl) 0;
 }
 
 .intro-description {
     font-size: 1.2rem;
     color: #64748B;
     text-align: center;
     max-width: 800px;
     margin: 0 auto var(--spacing-xl);
 }
 
 .identification-principles {
     margin: var(--spacing-xxl) 0;
 }
 
 .identification-principles h3 {
     text-align: center;
     margin-bottom: var(--spacing-lg);
     color: var(--accent-primary);
 }
 
 .principles-grid {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
     gap: var(--spacing-lg);
 }
 
 .principle-item {
     background-color: var(--bg-white);
     padding: var(--spacing-lg);
     border-radius: var(--border-radius-lg);
     text-align: center;
     box-shadow: var(--shadow-sm);
     transition: transform var(--transition-normal);
     border-top: 4px solid var(--accent-secondary);
 }
 
 .principle-item:hover {
     transform: translateY(-5px);
     box-shadow: var(--shadow-md);
 }
 
 .principle-icon {
     font-size: 3rem;
     margin-bottom: var(--spacing-md);
 }
 
 .principle-item h4 {
     color: var(--accent-primary);
     margin-bottom: var(--spacing-sm);
 }
 
 .principle-item p {
     color: #64748B;
     font-size: 0.95rem;
 }
 
 /* Identification Workflow */
 .identification-workflow {
     margin: var(--spacing-xxl) 0;
     padding: var(--spacing-xl);
     background-color: var(--bg-white);
     border-radius: var(--border-radius-lg);
     box-shadow: var(--shadow-sm);
 }
 
 .identification-workflow h3 {
     text-align: center;
     margin-bottom: var(--spacing-lg);
     color: var(--accent-primary);
 }
 
 .workflow-steps {
     display: grid;
     gap: var(--spacing-md);
     max-width: 600px;
     margin: 0 auto;
 }
 
 .workflow-step {
     display: flex;
     align-items: center;
     gap: var(--spacing-md);
     padding: var(--spacing-md);
     background-color: var(--bg-primary);
     border-radius: var(--border-radius-md);
     transition: all var(--transition-normal);
 }
 
 .workflow-step:hover {
     transform: translateX(10px);
     box-shadow: var(--shadow-sm);
 }
 
 .step-number {
     width: 50px;
     height: 50px;
     background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
     color: var(--bg-white);
     border-radius: 50%;
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 1.2rem;
     font-weight: 700;
     flex-shrink: 0;
 }
 
 .step-content h4 {
     color: var(--accent-primary);
     margin-bottom: var(--spacing-xs);
 }
 
 .step-content p {
     color: #64748B;
     font-size: 0.9rem;
 }
 
 /* Enhanced Safety Warning */
 .safety-warning.enhanced {
     background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
     border: 2px solid #F59E0B;
     border-radius: var(--border-radius-lg);
     padding: var(--spacing-xl);
     margin-top: var(--spacing-xxl);
 }
 
 .warning-header {
     display: flex;
     align-items: center;
     gap: var(--spacing-md);
     margin-bottom: var(--spacing-lg);
     justify-content: center;
 }
 
 .warning-icon {
     font-size: 2rem;
 }
 
 .warning-header h3 {
     color: #92400E;
     margin: 0;
 }
 
 .safety-rules {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
     gap: var(--spacing-lg);
 }
 
 .safety-category {
     background-color: var(--bg-white);
     padding: var(--spacing-md);
     border-radius: var(--border-radius-md);
     border-left: 4px solid #F59E0B;
 }
 
 .safety-category h4 {
     color: #92400E;
     margin-bottom: var(--spacing-sm);
     font-size: 1rem;
 }
 
 .safety-category ul {
     margin: 0;
 }
 
 .safety-category li {
     color: #78350F;
     font-size: 0.9rem;
     margin-bottom: var(--spacing-xs);
 }
 
 @media (max-width: 768px) {
     .principles-grid {
         grid-template-columns: 1fr;
     }
     
     .workflow-step {
         flex-direction: column;
         text-align: center;
     }
     
     .safety-rules {
         grid-template-columns: 1fr;
     }
 }

/* ===== UTILITY CLASSES ===== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 {
    margin-bottom: 0;
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mt-0 {
    margin-top: 0;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.hidden {
    display: none;
}

.visible {
    display: block;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

/* ===== MODAL STYLES ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease-out;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    opacity: 1;
}

.modal-content {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 900px;
    max-height: 90vh;
    width: 100%;
    overflow: hidden;
    animation: slideInModal 0.3s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 2px solid var(--bg-primary);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-white);
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--bg-white);
}

.close {
    font-size: 2rem;
    font-weight: bold;
    color: var(--bg-white);
    cursor: pointer;
    transition: all var(--transition-fast);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
}

.close:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.modal-body {
    padding: var(--spacing-xl);
    max-height: 70vh;
    overflow-y: auto;
}

.article-meta-full {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--bg-primary);
    flex-wrap: wrap;
    align-items: center;
}

.article-meta-full .article-date,
.article-meta-full .article-category,
.article-meta-full .article-read-time {
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: fit-content;
    white-space: nowrap;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-fast);
}

.article-meta-full .article-date:hover,
.article-meta-full .article-category:hover,
.article-meta-full .article-read-time:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.article-meta-full .article-date {
    background: linear-gradient(135deg, var(--accent-primary), #1E40AF);
}

.article-meta-full .article-category {
    background: linear-gradient(135deg, var(--accent-secondary), #059669);
}

.article-meta-full .article-read-time {
    background: linear-gradient(135deg, var(--accent-gold), #D97706);
}

.article-content-full {
    line-height: 1.8;
    font-size: 1rem;
}

.article-content-full h3 {
    color: var(--accent-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
    border-left: 4px solid var(--accent-secondary);
    padding-left: var(--spacing-md);
}

.article-content-full p {
    margin-bottom: var(--spacing-md);
    color: #374151;
    text-align: justify;
}

.article-content-full ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.article-content-full li {
    margin-bottom: var(--spacing-xs);
    color: #374151;
}

.article-content-full strong {
    color: var(--accent-primary);
    font-weight: 600;
}

/* Modal animations */
@keyframes slideInModal {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Modal responsive */
@media (max-width: 768px) {
    .modal {
        padding: var(--spacing-sm);
    }
    
    .modal-content {
        max-height: 95vh;
    }
    
    .modal-header {
        padding: var(--spacing-md);
    }
    
    .modal-header h2 {
        font-size: 1.2rem;
    }
    
    .modal-body {
        padding: var(--spacing-md);
        max-height: 75vh;
    }
    
    .article-meta-full {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .article-content-full {
        font-size: 0.95rem;
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ===== GALLERY SLIDER ===== */
.gallery-section {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-primary) 100%);
}

.gallery-description {
    text-align: center;
    font-size: 1.1rem;
    color: #64748B;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.gallery-slider {
    max-width: 800px;
    margin: 0 auto;
}

.slider-container {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    background-color: var(--bg-white);
}

.slider-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.slide {
    min-width: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-xl);
}

.slide img {
    width: 100%;
    max-width: 400px;
    height: 300px;
    object-fit: cover;
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-lg);
}

.slide-info {
    text-align: center;
    max-width: 500px;
}

.slide-info h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.slide-info p {
    color: #64748B;
    font-size: 1rem;
    line-height: 1.6;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    color: var(--accent-primary);
    box-shadow: var(--shadow-md);
    z-index: 10;
}

.slider-btn:hover {
    background: var(--bg-white);
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--shadow-lg);
}

.prev-btn {
    left: var(--spacing-md);
}

.next-btn {
    right: var(--spacing-md);
}

.slider-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background-color: #CBD5E1;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background-color: var(--accent-primary);
    transform: scale(1.2);
}

.dot:hover {
    background-color: var(--accent-secondary);
    transform: scale(1.1);
}

/* ===== CONTACT FORM SECTION ===== */
.contact-form-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.form-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: start;
}

.form-text h2 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    font-size: 2rem;
}

.form-text p {
    color: #64748B;
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
}

.contact-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.benefit {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.benefit-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.benefit h4 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

.benefit p {
    color: #64748B;
    font-size: 0.95rem;
    margin: 0;
}

.contact-form {
    background-color: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid #E2E8F0;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
    background-color: var(--bg-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(46, 92, 146, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-submit {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: var(--spacing-md);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .form-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .slider-btn {
        width: 40px;
        height: 40px;
    }
    
    .prev-btn {
        left: var(--spacing-sm);
    }
    
    .next-btn {
        right: var(--spacing-sm);
    }
    
    .slide {
        padding: var(--spacing-lg);
    }
    
    .slide img {
        height: 250px;
    }
    
    .contact-form {
        padding: var(--spacing-lg);
    }
    
    .form-text h2 {
        font-size: 1.5rem;
    }
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}

/* ===== PRINT STYLES ===== */
@media print {
    .header,
    .footer,
    .cookie-popup,
    .btn-primary,
    .btn-secondary {
        display: none;
    }
    
    body {
        background-color: white;
        color: black;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Skip link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 10001;
}

.skip-link:focus {
    top: 6px;
}

/* ===== EQUIPMENT AND TOOLS STYLING ===== */
.equipment-tools {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #F8FAFC 100%);
    padding: var(--spacing-xxl) 0;
}

.tools-categories {
    margin-top: var(--spacing-xl);
}

.tool-category {
    margin-bottom: var(--spacing-xxl);
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border-left: 5px solid var(--accent-primary);
    transition: all var(--transition-normal);
}

.tool-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tool-category h3 {
    color: var(--accent-primary);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tool-category h3::before {
    content: "🔧";
    font-size: 1.2em;
}

.tool-category:nth-child(1) h3::before { content: "🔍"; }
.tool-category:nth-child(2) h3::before { content: "⚗️"; }
.tool-category:nth-child(3) h3::before { content: "🔬"; }
.tool-category:nth-child(4) h3::before { content: "📏"; }

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.tool-item {
    background: linear-gradient(135deg, #F8FAFC 0%, var(--bg-primary) 100%);
    border: 2px solid #E2E8F0;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.tool-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.tool-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.tool-item:hover::before {
    transform: scaleX(1);
}

.tool-item h4 {
    color: var(--accent-primary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.tool-item h4::before {
    content: "▶";
    color: var(--accent-secondary);
    font-size: 0.8em;
}

.tool-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.safety-equipment {
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border: 2px solid #F59E0B;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xxl);
    position: relative;
}

.safety-equipment::before {
    content: "⚠️";
    position: absolute;
    top: -15px;
    left: var(--spacing-lg);
    background: #F59E0B;
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 1.2em;
}

.safety-equipment h3 {
    color: #D97706;
    font-size: 1.4rem;
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.safety-equipment ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-sm);
    list-style: none;
    padding: 0;
    margin: var(--spacing-md) 0 0 0;
}

.safety-equipment li {
    background: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid #D97706;
    transition: all var(--transition-fast);
}

.safety-equipment li:hover {
    background: rgba(255, 255, 255, 1);
    transform: translateX(5px);
}

.safety-equipment li strong {
    color: #D97706;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .tool-category {
        padding: var(--spacing-lg);
    }
    
    .safety-equipment ul {
        grid-template-columns: 1fr;
    }
}

/* ===== HISTORICAL DEVELOPMENT SECTION ===== */
.historical-development {
    background: linear-gradient(135deg, #F8FAFC 0%, var(--bg-primary) 100%);
    padding: var(--spacing-xxl) 0;
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-xl) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xxl);
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-lg);
    font-weight: 700;
    font-size: 1.2rem;
    min-width: 80px;
    text-align: center;
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-md);
}

.timeline-content {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    margin: 0 var(--spacing-lg);
    flex: 1;
    max-width: 400px;
    border-left: 4px solid var(--accent-secondary);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.timeline-content h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 20px;
}

/* ===== MODERN METHODS SECTION ===== */
.modern-methods {
    background: var(--bg-white);
    padding: var(--spacing-xxl) 0;
}

.methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.method-card {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #F8FAFC 100%);
    border: 2px solid #E2E8F0;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.method-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.method-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.method-card:hover::before {
    transform: scaleX(1);
}

.method-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.method-card h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.4rem;
}

.method-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.method-details {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
}

.detail-tag {
    background: linear-gradient(135deg, var(--accent-secondary), #7BC8A4);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        padding-left: var(--spacing-xl);
    }
    
    .timeline-year {
        position: absolute;
        left: 0;
        min-width: 60px;
        font-size: 1rem;
    }
    
    .timeline-content {
        margin-left: var(--spacing-xxl);
        margin-right: 0;
        max-width: none;
    }
    
    .methods-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== COMPACT FORM STYLES ===== */
.compact-form .form-group.compact {
    margin-bottom: var(--spacing-sm);
}

.compact-form .form-group.compact label {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.compact-form .form-group.compact input,
.compact-form .form-group.compact select,
.compact-form .form-group.compact textarea {
    padding: var(--spacing-sm);
    font-size: 0.95rem;
}

.compact-form .form-group.compact textarea {
    min-height: 100px;
}

.compact-form .checkbox-group.compact {
    margin-bottom: var(--spacing-sm);
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
}

.compact-form .checkbox-group.compact .checkbox-label {
    font-size: 0.9rem;
    line-height: 1.4;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
}

.compact-form .form-row {
    margin-bottom: 0;
}

.compact-form .form-row .form-group.compact {
    margin-bottom: var(--spacing-sm);
}

.compact-form .btn-primary {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-xl);
}

/* Remove browser validation messages */
input:invalid,
select:invalid,
textarea:invalid {
    box-shadow: none;
}

input:focus:invalid,
select:focus:invalid,
textarea:focus:invalid {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(46, 92, 146, 0.1);
}

/* ===== ENHANCED PRINCIPLE CARDS ===== */
.principle-card.enhanced {
    position: relative;
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-primary) 100%);
    border: 2px solid #E2E8F0;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.principle-card.enhanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.principle-card.enhanced:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-primary);
}

.principle-card.enhanced:hover::before {
    transform: scaleX(1);
}

.principle-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
    text-align: center;
}

.principle-details {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid #E2E8F0;
}

.principle-details h4 {
    color: var(--accent-primary);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.principle-details ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.principle-details li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
    padding-left: var(--spacing-md);
}

.principle-details li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--accent-secondary);
    font-size: 0.7em;
}

.principle-details strong {
    color: var(--accent-primary);
    font-weight: 600;
}

/* ===== ADVANCED CLASSIFICATION SECTION ===== */
.advanced-classification {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #F8FAFC 100%);
    padding: var(--spacing-xxl) 0;
}

.advanced-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.method-showcase {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid #E2E8F0;
}

.method-showcase:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.method-header {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: var(--bg-white);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.method-icon {
    font-size: 2rem;
    opacity: 0.9;
}

.method-header h3 {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 700;
}

.method-content {
    padding: var(--spacing-lg);
}

.method-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.method-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.feature-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: linear-gradient(135deg, var(--bg-primary) 0%, #F8FAFC 100%);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--accent-secondary);
    transition: all var(--transition-fast);
}

.feature-item:hover {
    background: var(--accent-secondary);
    color: var(--bg-white);
    transform: translateX(5px);
}

.feature-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.feature-item:hover .feature-label {
    color: var(--bg-white);
}

.feature-value {
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 500;
    text-align: right;
}

.feature-item:hover .feature-value {
    color: rgba(255, 255, 255, 0.9);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .principles-grid {
        grid-template-columns: 1fr;
    }
    
    .advanced-methods {
        grid-template-columns: 1fr;
    }
    
    .principle-card.enhanced {
        padding: var(--spacing-lg);
    }
    
    .method-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-xs);
    }
    
    .feature-value {
        text-align: center;
    }
}

/* ===== TESTIMONIALS & CERTIFICATIONS SECTION ===== */
.testimonials-section {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-primary) 100%);
    padding: var(--spacing-xxl) 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.testimonial-card {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid #E2E8F0;
    position: relative;
    overflow: hidden;
}

.testimonial-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.testimonial-card.expert::before {
    background: linear-gradient(90deg, #2E5C92, #7BC8A4);
}

.testimonial-card.student::before {
    background: linear-gradient(90deg, #7BC8A4, #C89B3C);
}

.testimonial-card.researcher::before {
    background: linear-gradient(90deg, #C89B3C, #2E5C92);
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.expert-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.avatar-placeholder {
    color: var(--bg-white);
    font-weight: 700;
    font-size: 1.2rem;
}

.avatar-image {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
    border: 2px solid var(--accent-secondary);
}

.avatar-image:hover {
    transform: scale(1.05);
}

.expert-info h4 {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
}

.expert-info p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.testimonial-content {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.quote-icon {
    position: absolute;
    top: -10px;
    left: -10px;
    font-size: 3rem;
    color: var(--accent-secondary);
    opacity: 0.3;
    font-family: serif;
}

.testimonial-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-style: italic;
    margin: 0;
    padding-left: var(--spacing-md);
}

.testimonial-rating {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid #E2E8F0;
}

.stars {
    color: #F59E0B;
    font-size: 1.2rem;
}

.rating-text {
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Certifications */
.certifications {
    margin-top: var(--spacing-xxl);
    text-align: center;
}

.certifications h3 {
    color: var(--accent-primary);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xl);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.certification-item {
    background: var(--bg-white);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
    border: 2px solid #E2E8F0;
    position: relative;
}

.certification-item:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.cert-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.cert-content h4 {
    color: var(--accent-primary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.cert-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.cert-year {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--accent-secondary);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

/* Statistics */
.statistics {
    margin-top: var(--spacing-xxl);
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    color: var(--bg-white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    text-align: center;
}

.statistics .stat-item {
    padding: var(--spacing-md);
}

.statistics .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--bg-white);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.statistics .stat-label {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .certifications-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonial-card {
        padding: var(--spacing-lg);
    }
    
    .testimonial-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .testimonial-rating {
        flex-direction: column;
        gap: var(--spacing-xs);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== ENHANCED PHYSICAL TESTS SECTION ===== */
.physical-tests.enhanced {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-primary) 100%);
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.intro-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0 var(--spacing-xxl) 0;
}

.intro-card {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid #E2E8F0;
    transition: all var(--transition-normal);
}

.intro-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.intro-card h3 {
    color: var(--accent-primary);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.intro-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.tests-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xxl);
    margin-top: var(--spacing-xl);
}

.test-card {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid #E2E8F0;
    transition: all var(--transition-normal);
    position: relative;
}

.test-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.test-card.primary::before {
    background: linear-gradient(90deg, #2E5C92, #7BC8A4);
}

.test-card.secondary::before {
    background: linear-gradient(90deg, #7BC8A4, #C89B3C);
}

.test-card.tertiary::before {
    background: linear-gradient(90deg, #C89B3C, #2E5C92);
}

.test-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.test-header {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #F8FAFC 100%);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid #E2E8F0;
}

.test-icon {
    font-size: 2.5rem;
    opacity: 0.9;
}

.test-title h3 {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--accent-primary);
    font-size: 1.4rem;
    font-weight: 700;
}

.test-subtitle {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-style: italic;
}

.test-content {
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.test-visual {
    text-align: center;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #F8FAFC 0%, var(--bg-primary) 100%);
    border-radius: var(--border-radius-md);
}

.test-visual img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-sm);
}

.test-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.test-details.full-width {
    grid-column: 1 / -1;
}

.detail-section {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #F8FAFC 100%);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--accent-secondary);
}

.detail-section h4 {
    color: var(--accent-primary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.tools-list {
    display: grid;
    gap: var(--spacing-sm);
}

.tool-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--bg-white);
    border-radius: var(--border-radius-sm);
    border: 1px solid #E2E8F0;
    transition: all var(--transition-fast);
}

.tool-item:hover {
    background: var(--accent-secondary);
    color: var(--bg-white);
    transform: translateX(5px);
}

.hardness {
    background: var(--accent-primary);
    color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

.tool-item:hover .hardness {
    background: var(--bg-white);
    color: var(--accent-primary);
}

.method-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.step {
    padding: var(--spacing-sm);
    background: var(--bg-white);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--accent-secondary);
    transition: all var(--transition-fast);
    position: relative;
    padding-left: var(--spacing-lg);
}

.step::before {
    content: '▶';
    position: absolute;
    left: var(--spacing-sm);
    color: var(--accent-secondary);
    font-size: 0.8em;
}

.step:hover {
    background: var(--accent-secondary);
    color: var(--bg-white);
    transform: translateX(5px);
}

.step.formula {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: var(--bg-white);
    font-weight: 500;
}

.important-notes {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.note {
    padding: var(--spacing-sm);
    background: #FEF3C7;
    border: 1px solid #F59E0B;
    border-radius: var(--border-radius-sm);
    color: #92400E;
    font-size: 0.9rem;
    position: relative;
    padding-left: var(--spacing-lg);
}

.note::before {
    content: '⚠️';
    position: absolute;
    left: var(--spacing-sm);
    font-size: 0.8em;
}

.density-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.density-item {
    background: var(--bg-white);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    text-align: center;
    border: 2px solid #E2E8F0;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.density-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    transition: all var(--transition-normal);
}

.density-item.light::before {
    background: #10B981;
}

.density-item.medium::before {
    background: #F59E0B;
}

.density-item.heavy::before {
    background: #EF4444;
}

.density-item.very-heavy::before {
    background: #8B5CF6;
}

.density-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.density-label {
    display: block;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.density-range {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.density-examples {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

.precise-method {
    background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
    border: 1px solid #0EA5E9;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .test-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .test-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    .intro-cards {
        grid-template-columns: 1fr;
    }
    
    .density-categories {
        grid-template-columns: 1fr;
    }
    
    .test-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .test-content {
        padding: var(--spacing-md);
    }
    
    .detail-section {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .tools-list {
        gap: var(--spacing-xs);
    }
    
    .tool-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-xs);
    }
}

/* ===== ENHANCED OPTICAL TESTS SECTION ===== */
.optical-tests.enhanced {
    background: linear-gradient(135deg, #F8FAFC 0%, var(--bg-white) 100%);
    padding: var(--spacing-xxl) 0;
}

.optical-tests.enhanced .intro-cards {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Observation List Styles */
.observation-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.observation-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--bg-white);
    border-radius: var(--border-radius-sm);
    border: 1px solid #E2E8F0;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.observation-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-secondary);
    transform: scaleY(0);
    transition: transform var(--transition-normal);
}

.observation-item:hover {
    background: linear-gradient(135deg, var(--accent-secondary) 0%, #7BC8A4 100%);
    color: var(--bg-white);
    transform: translateX(5px);
}

.observation-item:hover::before {
    transform: scaleY(1);
}

.obs-label {
    font-weight: 600;
    color: var(--accent-primary);
    font-size: 0.9rem;
}

.observation-item:hover .obs-label {
    color: var(--bg-white);
}

.obs-description {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-style: italic;
    text-align: right;
}

.observation-item:hover .obs-description {
    color: rgba(255, 255, 255, 0.9);
}

/* Mineral Examples Styles */
.mineral-examples {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.mineral-example {
    background: var(--bg-white);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    border: 2px solid #E2E8F0;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.mineral-example::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    transition: all var(--transition-normal);
}

.mineral-example.quartz::before {
    background: linear-gradient(90deg, #E5E7EB, #9CA3AF);
}

.mineral-example.mica::before {
    background: linear-gradient(90deg, #FEF3C7, #F59E0B);
}

.mineral-example.pyrite::before {
    background: linear-gradient(90deg, #FCD34D, #D97706);
}

.mineral-example.hematite::before {
    background: linear-gradient(90deg, #FCA5A5, #DC2626);
}

.mineral-example:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.mineral-name {
    display: block;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

.mineral-features {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.4;
}

/* Fluorescence Grid Styles */
.fluorescence-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.fluorescence-item {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 2px solid #E2E8F0;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.fluorescence-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #8B5CF6, #A78BFA);
}

.fluorescence-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: #8B5CF6;
}

.fluor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.fluorescence-item .mineral-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin: 0;
}

.fluor-colors {
    display: flex;
    gap: var(--spacing-xs);
}

.color-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid var(--bg-white);
    box-shadow: 0 0 0 1px #E2E8F0;
    transition: transform var(--transition-fast);
}

.color-dot:hover {
    transform: scale(1.2);
}

.color-dot.blue {
    background: #3B82F6;
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.5);
}

.color-dot.purple {
    background: #8B5CF6;
    box-shadow: 0 0 8px rgba(139, 92, 246, 0.5);
}

.color-dot.green {
    background: #10B981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

.color-dot.red {
    background: #EF4444;
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.5);
}

.color-dot.orange {
    background: #F59E0B;
    box-shadow: 0 0 8px rgba(245, 158, 11, 0.5);
}

.color-dot.bright-green {
    background: #22C55E;
    box-shadow: 0 0 12px rgba(34, 197, 94, 0.7);
}

.color-dot.light-blue {
    background: #06B6D4;
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.5);
}

.fluor-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

/* UV Safety Notes */
.uv-safety-notes {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.safety-note {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border: 1px solid #F59E0B;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.safety-note:hover {
    background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
    color: var(--bg-white);
    transform: translateX(5px);
}

.note-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.note-text {
    color: #92400E;
    font-size: 0.9rem;
    line-height: 1.4;
}

.safety-note:hover .note-text {
    color: var(--bg-white);
}

/* Responsive adjustments for optical tests */
@media (max-width: 768px) {
    .optical-tests.enhanced .intro-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .fluorescence-grid {
        grid-template-columns: 1fr;
    }
    
    .mineral-examples {
        grid-template-columns: 1fr;
    }
    
    .observation-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-xs);
    }
    
    .obs-description {
        text-align: center;
    }
    
    .fluor-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .optical-tests.enhanced .intro-cards {
        grid-template-columns: 1fr;
    }
    
    .safety-note {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-xs);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #FFFFFF;
        --accent-primary: #000000;
        --accent-secondary: #000000;
        --text-primary: #000000;
        --accent-gold: #000000;
        --bg-white: #FFFFFF;
    }
}