/* ===== RESET & BASE STYLES ===== */
:root {
    --primary-color: #0A2472;
    --secondary-color: #00B4D8;
    --accent-color: #FF9E6D;
    --light-color: #F8F9FA;
    --dark-color: #212529;
    --gray-color: #6C757D;
    --light-gray: #E9ECEF;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.14);
    --shadow-xl: 0 12px 24px rgba(0,0,0,0.16);
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-round: 50%;
}

[data-theme="dark"] {
    --primary-color: #1E40AF;
    --secondary-color: #0891B2;
    --accent-color: #FB923C;
    --light-color: #1F2937;
    --dark-color: #F9FAFB;
    --gray-color: #9CA3AF;
    --light-gray: #374151;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', sans-serif;
    color: var(--dark-color);
    background-color: var(--light-color);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-lg);
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--light-color);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Poppins', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: all var(--transition-fast);
    text-decoration: none;
    padding: 8px 0;
}

.nav-logo i {
    font-size: 2.2rem;
    color: var(--secondary-color);
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform var(--transition-normal);
}

.nav-logo span {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.nav-logo:hover {
    transform: scale(1.02);
}

.nav-logo:hover i {
    transform: rotate(15deg) scale(1.1);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--primary-color);
    cursor: pointer;
    padding: 10px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-toggle:hover {
    background-color: var(--light-gray);
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    color: var(--dark-color);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
    font-size: 0.95rem;
}

.nav-link i {
    font-size: 1rem;
    color: var(--secondary-color);
    transition: transform var(--transition-fast);
}

.nav-link:hover i {
    transform: scale(1.2);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
    transition: width var(--transition-normal);
    border-radius: 3px;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 70%;
}

.nav-link:hover {
    color: var(--secondary-color);
    background-color: rgba(0,180,216,0.1);
}

.nav-link.active {
    color: var(--secondary-color);
    background-color: rgba(0,180,216,0.15);
}

.theme-toggle button {
    background: none;
    border: none;
    font-size: 1.3rem;
    color: var(--dark-color);
    cursor: pointer;
    padding: 10px;
    border-radius: var(--radius-round);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle button:hover {
    background-color: var(--light-gray);
    transform: rotate(30deg) scale(1.1);
    color: var(--secondary-color);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, var(--secondary-color) 0%, transparent 30%),
                radial-gradient(circle at 70% 80%, var(--primary-color) 0%, transparent 30%);
    opacity: 0.1;
    animation: particleMove 20s infinite linear;
}

@keyframes particleMove {
    0% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(5deg); }
    100% { transform: scale(1) rotate(0deg); }
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--gray-color);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ai-network {
    position: relative;
    width: 450px;
    height: 450px;
}

.network-node {
    position: absolute;
    width: 80px;
    height: 80px;
    background-color: var(--light-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--secondary-color);
    transition: all var(--transition-normal);
    animation: float 3s infinite ease-in-out;
}

.network-node:hover {
    transform: scale(1.2) !important;
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.node-main {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    font-size: 3rem;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
    border: none;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: var(--shadow-lg); }
    50% { box-shadow: 0 0 30px var(--secondary-color); }
}

.node-1 { top: 15%; left: 15%; animation-delay: 0.1s; }
.node-2 { top: 15%; right: 15%; animation-delay: 0.2s; }
.node-3 { bottom: 15%; left: 15%; animation-delay: 0.3s; }
.node-4 { bottom: 15%; right: 15%; animation-delay: 0.4s; }

/* ===== SECTIONS ===== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.3rem;
    color: var(--gray-color);
    max-width: 700px;
    margin: 0 auto;
}

/* ===== OVERVIEW SECTION ===== */
.overview {
    background-color: var(--light-gray);
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.overview-card {
    background-color: var(--light-color);
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.overview-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
    height: 80px;
    width: 80px;
    background-color: rgba(0,180,216,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: all var(--transition-normal);
}

.overview-card:hover .card-icon {
    transform: rotate(360deg);
    background-color: var(--secondary-color);
    color: white;
}

/* ===== STATS SECTION ===== */
.stats {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    font-family: 'Poppins', sans-serif;
    line-height: 1;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 500;
}

/* ===== ABOUT SECTION ===== */
.about-section {
    background-color: var(--light-gray);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.team-card {
    background-color: var(--light-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.team-image {
    height: 150px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
}

.team-card-inner {
    padding: 25px;
    text-align: center;
}

.team-card h3 {
    color: var(--primary-color);
    margin-bottom: 5px;
    font-size: 1.3rem;
}

.team-role {
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.team-email {
    color: var(--gray-color);
    font-size: 0.85rem;
    margin-bottom: 15px;
    word-break: break-all;
}

.team-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin: 15px 0;
}

.tag {
    background-color: var(--light-gray);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.team-bio {
    color: var(--gray-color);
    font-size: 0.95rem;
}

/* Timeline */
.timeline {
    max-width: 800px;
    margin: 50px auto 0;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: var(--secondary-color);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    margin-bottom: 40px;
}

.timeline-date {
    position: absolute;
    left: 0;
    top: 0;
    background-color: var(--secondary-color);
    color: white;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    min-width: 100px;
    text-align: center;
}

.timeline-content {
    background-color: var(--light-color);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--secondary-color);
}

.timeline-content h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--gray-color);
    margin-bottom: 0;
}

.supervisor-card {
    max-width: 800px;
    margin: 50px auto 0;
    background-color: var(--light-color);
    padding: 40px;
    border-radius: var(--radius-lg);
    display: flex;
    gap: 40px;
    align-items: center;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--secondary-color);
}

.supervisor-image {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    color: white;
    flex-shrink: 0;
}

.supervisor-info h2 {
    color: var(--gray-color);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
}

.supervisor-info h3 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 10px;
}

.supervisor-title {
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 5px;
}

.supervisor-institution {
    color: var(--gray-color);
    margin-bottom: 15px;
}

/* ===== FRAMEWORK SECTION ===== */
.framework-section {
    background-color: var(--light-color);
}

.framework-methodology {
    margin: 60px 0;
    text-align: center;
}

.framework-methodology h3 {
    margin-bottom: 40px;
}

.methodology-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 30px;
}

.method-card {
    background-color: var(--light-gray);
    padding: 30px 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.method-card:hover {
    transform: translateY(-8px);
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-xl);
}

.method-icon {
    font-size: 2.8rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.method-card h4 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 15px;
    line-height: 1.4;
}

.method-card h4 span {
    font-weight: 400;
    font-size: 1rem;
    color: var(--gray-color);
    display: block;
    margin-top: 5px;
}

.method-card p {
    color: var(--gray-color);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.principles-container {
    max-width: 900px;
    margin: 50px auto 0;
}

.principle-card {
    background-color: var(--light-color);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

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

.principle-card.expanded {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-xl);
}

.principle-header {
    padding: 25px 30px;
    display: flex;
    align-items: center;
    gap: 20px;
    cursor: pointer;
    background-color: var(--light-color);
    transition: background-color var(--transition-fast);
}

.principle-header:hover {
    background-color: var(--light-gray);
}

.principle-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    min-width: 60px;
    font-family: 'Poppins', sans-serif;
}

.principle-title {
    flex: 1;
}

.principle-title h3 {
    color: var(--primary-color);
    margin-bottom: 5px;
    font-size: 1.5rem;
}

.principle-title p {
    color: var(--gray-color);
    margin-bottom: 0;
    font-size: 0.95rem;
}

.principle-toggle {
    font-size: 1.3rem;
    color: var(--secondary-color);
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: rgba(0,180,216,0.1);
    transition: all var(--transition-fast);
}

.principle-header:hover .principle-toggle {
    background-color: var(--secondary-color);
    color: white;
    transform: rotate(180deg);
}

.principle-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
}

.principle-card.expanded .principle-content {
    max-height: 2000px;
}

.principle-details {
    padding: 0 30px 30px;
    border-top: 2px solid var(--light-gray);
}

.principle-details h4 {
    color: var(--primary-color);
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.principle-details h4:first-child {
    margin-top: 0;
}

.principle-details p {
    color: var(--gray-color);
    margin-bottom: 15px;
}

.principle-quote {
    background-color: rgba(0,180,216,0.1);
    padding: 20px;
    border-radius: var(--radius-md);
    margin-top: 25px;
    border-left: 4px solid var(--secondary-color);
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.principle-quote i {
    color: var(--secondary-color);
    font-size: 1.5rem;
}

.principle-quote p {
    margin: 0;
    font-style: italic;
    color: var(--primary-color);
    font-weight: 500;
}

/* ===== FINDINGS SECTION ===== */
.findings-section {
    background-color: var(--light-gray);
}

.intro-card {
    background-color: var(--light-color);
    padding: 40px;
    border-radius: var(--radius-lg);
    display: flex;
    gap: 40px;
    align-items: center;
    margin-bottom: 50px;
}

.intro-content {
    flex: 2;
}

.intro-content h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 20px;
}

.intro-content p {
    color: var(--gray-color);
    margin-bottom: 20px;
}

.framework-stats {
    display: flex;
    gap: 30px;
    margin-top: 30px;
}

.framework-stats .stat {
    text-align: center;
}

.framework-stats .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.framework-stats .stat-label {
    color: var(--gray-color);
    font-size: 0.9rem;
}

.intro-image {
    flex: 1;
    text-align: center;
    font-size: 8rem;
    color: var(--secondary-color);
    opacity: 0.8;
}

.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.chart-card {
    background-color: var(--light-color);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.chart-card h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.chart-wrapper {
    height: 250px;
    margin: 20px 0;
}

.chart-insight {
    background-color: rgba(0,180,216,0.1);
    padding: 15px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.chart-insight i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

/* ===== EXPERIMENT SECTION ===== */
.experiment-section {
    background-color: var(--light-color);
}

.experiment-overview {
    margin-bottom: 50px;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.overview-item {
    text-align: center;
    padding: 30px;
    background-color: var(--light-gray);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.overview-item:hover {
    transform: translateY(-5px);
    background-color: var(--light-color);
    box-shadow: var(--shadow-md);
}

.overview-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.overview-item h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.overview-item p {
    color: var(--gray-color);
    margin-bottom: 0;
}

.results-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin: 40px 0;
}

.result-card {
    background-color: var(--light-gray);
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
}

.result-card.positive {
    border-color: var(--secondary-color);
}

.result-card.insight {
    border-color: var(--accent-color);
}

.result-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.conclusion {
    background-color: var(--light-gray);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    margin-top: 40px;
}

/* ===== RESOURCES SECTION ===== */
.resources-section {
    background-color: var(--light-gray);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.resource-card {
    background-color: var(--light-color);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.resource-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-color);
}

.resource-card.primary {
    border: 2px solid var(--secondary-color);
}

.resource-icon {
    font-size: 3.5rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.resource-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.resource-description {
    color: var(--gray-color);
    margin-bottom: 20px;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin: 50px 0;
}

.material-card {
    background-color: var(--light-color);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.material-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--light-gray);
}

.material-header i {
    color: var(--secondary-color);
    font-size: 1.5rem;
}

.material-header h3 {
    color: var(--primary-color);
    margin: 0;
    font-size: 1.2rem;
}

.material-list {
    list-style: none;
}

.material-list li {
    margin-bottom: 12px;
}

.material-list a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-color);
    transition: color var(--transition-fast);
}

.material-list a:hover {
    color: var(--secondary-color);
}

.material-list i {
    width: 20px;
    color: var(--secondary-color);
}

/* ===== CONTACT SECTION ===== */
.contact-section {
    background-color: var(--light-color);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-group label {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    padding: 15px;
    border: 2px solid var(--light-gray);
    border-radius: var(--radius-md);
    font-family: 'Open Sans', sans-serif;
    font-size: 1rem;
    background-color: var(--light-color);
    color: var(--dark-color);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0,180,216,0.1);
}

.contact-info {
    background-color: var(--light-gray);
    padding: 40px;
    border-radius: var(--radius-lg);
}

.contact-info h3 {
    color: var(--primary-color);
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    color: var(--gray-color);
}

.contact-info i {
    color: var(--secondary-color);
    font-size: 1.3rem;
    width: 25px;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.8rem;
    color: white;
    margin-bottom: 15px;
}

.footer-logo i {
    color: var(--secondary-color);
}

.footer-logo p {
    color: rgba(255,255,255,0.8);
}

.footer-links h4,
.footer-team h4 {
    color: white;
    margin-bottom: 20px;
    font-size: 1.2rem;
    position: relative;
    display: inline-block;
}

.footer-links h4::after,
.footer-team h4::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 3px;
}

.footer-links a {
    display: block;
    color: rgba(255,255,255,0.8);
    margin-bottom: 10px;
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--secondary-color);
    transform: translateX(5px);
}

.footer-team p {
    color: rgba(255,255,255,0.8);
    margin-bottom: 8px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: 30px;
    text-align: center;
    color: rgba(255,255,255,0.7);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    .hero-title { font-size: 3rem; }
    .ai-network { width: 350px; height: 350px; }
    .intro-card { flex-direction: column; text-align: center; }
    .methodology-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        flex-direction: column;
        background-color: var(--light-color);
        width: 100%;
        transition: left 0.4s ease;
        box-shadow: var(--shadow-xl);
        padding: 30px;
        height: calc(100vh - 80px);
        overflow-y: auto;
    }
    .nav-menu.active { left: 0; }
    .nav-link { width: 100%; justify-content: center; }
    .methodology-grid { grid-template-columns: 1fr; }
    .principle-header { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .btn { width: 100%; }
    .framework-stats { flex-direction: column; }
}