:root {
    --primary: #1a1a2e;
    --secondary: #16213e;
    --accent: #e94560;
    --accent-light: #ff6b88;
    --text: #2d3436;
    --text-light: #636e72;
    --bg: #ffffff;
    --bg-soft: #f8f9fa;
    --border: #e1e8ed;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Work Sans', sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--bg);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    animation: slideDown 0.6s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

nav .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-family: 'Crimson Pro', serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

nav .logo span {
    color: var(--accent);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

nav a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

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

nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 6rem 2rem 4rem;
    background: #f5f5f7;
    color: var(--text);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(0,0,0,0.02)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 1;
}

.hero .container {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    background: var(--accent);
    border: 1px solid var(--accent);
    color: white;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 2rem;
    animation: fadeIn 0.8s ease-out 0.2s both;
}

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

.hero h1 {
    font-family: 'Crimson Pro', serif;
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    animation: fadeIn 0.8s ease-out 0.4s both;
}

.hero .subtitle {
    font-size: 1.3rem;
    line-height: 1.6;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    font-weight: 400;
    animation: fadeIn 0.8s ease-out 0.6s both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    animation: fadeIn 0.8s ease-out 0.8s both;
}

.stat-item {
    background: white;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: 12px;
    transition: transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.stat-number {
    font-family: 'Crimson Pro', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    display: block;
    margin-bottom: 0.3rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Container */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Sections */
section {
    padding: 5rem 2rem;
    animation: fadeIn 0.8s ease-out;
}

section:nth-child(even) {
    background: var(--bg-soft);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    color: var(--accent);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

h2 {
    font-family: 'Crimson Pro', serif;
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
}

h3 {
    font-family: 'Crimson Pro', serif;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--primary);
    margin: 2rem 0 1rem;
}

h4 {
    font-family: 'Work Sans', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--secondary);
    margin: 1.5rem 0 0.8rem;
}

p {
    color: var(--text-light);
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
}

/* Task Cards */
.task-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.task-card {
    background: white;
    border: 2px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.task-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.task-card:hover {
    border-color: var(--accent);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

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

.task-label {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.task-card h3 {
    margin-top: 0;
    color: var(--primary);
}

.labels {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin: 1.5rem 0;
}

.label {
    background: var(--bg-soft);
    color: var(--text);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--border);
}

.example-box {
    background: var(--bg-soft);
    border-left: 4px solid var(--accent);
    padding: 1.2rem 1.5rem;
    margin: 1rem 0;
    border-radius: 8px;
    font-style: italic;
}

.example-box.arabic {
    direction: rtl;
    text-align: right;
}

.example-label {
    font-weight: 600;
    color: var(--accent);
    font-style: normal;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    display: block;
}

/* Dataset Section */
.dataset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.dataset-item {
    background: white;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.8rem;
    transition: all 0.3s ease;
}

.dataset-item:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.dataset-number {
    font-family: 'Crimson Pro', serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
    display: block;
    margin-bottom: 0.5rem;
}

.dataset-label {
    color: var(--text);
    font-weight: 500;
    font-size: 1rem;
}

/* Timeline */
.timeline {
    position: relative;
    padding: 2rem 0;
    margin: 3rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
    transform: translateX(-50%);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 1.5rem;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border: 3px solid white;
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.2);
    z-index: 2;
}

.timeline-item:nth-child(odd) .timeline-content {
    grid-column: 1;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    grid-column: 2;
    text-align: left;
}

.timeline-content {
    background: white;
    padding: 1.5rem 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

.timeline-date {
    font-weight: 700;
    color: var(--accent);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.timeline-event {
    color: var(--text);
    font-weight: 500;
}

/* Evaluation Metrics */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.metric-card {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px) scale(1.02);
}

.metric-title {
    font-weight: 600;
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-family: 'Crimson Pro', serif;
    font-size: 1.5rem;
    font-weight: 700;
}

.primary-metric {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    grid-column: 1 / -1;
}

.primary-metric .metric-value {
    font-size: 2rem;
}

/* Organizing Team */
.organizers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.organizer-card {
    background: white;
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.organizer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.organizer-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

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

.organizer-card h4 {
    color: var(--primary);
    font-size: 1.2rem;
    margin: 0 0 0.8rem 0;
    font-weight: 600;
}

.organizer-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.5;
}

/* CTA Section */
.cta-section {
    background: #f5f5f7;
    color: var(--text);
    text-align: center;
    padding: 5rem 2rem;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="2" cy="2" r="1" fill="rgba(0,0,0,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
}

.cta-section .container {
    position: relative;
    z-index: 1;
}

.cta-section h2 {
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.cta-section p {
    color: var(--text-light);
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2.5rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1rem;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(233, 69, 96, 0.4);
}

.btn-outline {
    background: white;
    color: var(--primary);
    border-color: var(--border);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-3px);
}

/* Footer */
footer {
    background: #f5f5f7;
    color: var(--text-light);
    padding: 3rem 2rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
}

footer p {
    color: var(--text-light);
    font-size: 0.95rem;
}

footer a {
    color: var(--accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    nav ul {
        display: none;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero .subtitle {
        font-size: 1.1rem;
    }

    h2 {
        font-size: 2rem;
    }

    .task-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 0;
        padding-left: 50px;
    }

    .timeline-item::before {
        left: 20px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        grid-column: 1;
        text-align: left;
    }

    .cta-buttons {
        flex-direction: column;
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}