/* CSS Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #dc2626;
    --primary-dark: #b91c1c;
    --primary-light: #fecaca;
    --secondary: #1e293b;
    --background: #fafafa;
    --surface: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.2s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--secondary) 0%, #0f172a 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 40px 20px;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.event-date {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    background: var(--primary);
    color: white;
    padding: 12px 32px;
    border-radius: 50px;
    margin-bottom: 32px;
    font-weight: 700;
}

.date-number {
    font-size: 2.5rem;
    line-height: 1;
}

.date-year {
    font-size: 1.25rem;
    opacity: 0.9;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    color: white;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.6;
}

.event-info {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
    margin-bottom: 48px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    font-weight: 500;
}

.info-item svg {
    color: var(--primary);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: white;
    padding: 16px 40px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(220, 38, 38, 0.4);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.5);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* About Section */
.about {
    padding: 100px 0;
    background: var(--surface);
}

.about h2 {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 60px;
    color: var(--text);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.about-card {
    background: var(--background);
    padding: 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition);
    border: 1px solid var(--border);
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.about-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}

.about-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Organizations Section */
.organizations {
    padding: 100px 0;
    background: var(--background);
}

.organizations h2 {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 48px;
}

/* Search and Filter */
.search-filter {
    max-width: 800px;
    margin: 0 auto 32px;
}

.search-box {
    position: relative;
    margin-bottom: 20px;
}

.search-box svg {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 18px 20px 18px 56px;
    font-size: 1rem;
    border: 2px solid var(--border);
    border-radius: 50px;
    background: var(--surface);
    color: var(--text);
    transition: all var(--transition);
    font-family: inherit;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.filter-tag {
    padding: 10px 20px;
    border: 2px solid var(--border);
    border-radius: 50px;
    background: var(--surface);
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.filter-tag:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-tag.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Organization Count */
.org-count {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 32px;
}

.org-count span {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
}

/* Organization Grid */
.org-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

/* Organization Card */
.org-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.org-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.org-card-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}

.org-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

img.org-avatar {
    width: auto;
    min-width: 56px;
    max-width: 80px;
    height: 56px;
    object-fit: contain;
    background: white;
    border: 1px solid var(--border);
    padding: 4px;
}

.org-card-title {
    flex: 1;
}

.org-card-title h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
    line-height: 1.3;
}

.org-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 10px;
    border-radius: 50px;
}

.org-card-description {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.org-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.org-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
}

.org-card-link:hover {
    gap: 10px;
}

.org-card-more {
    color: var(--text-muted);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    text-align: center;
    color: white;
}

.cta-section h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 32px;
}

.social-links {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.social-link {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all var(--transition);
}

.social-link:hover {
    background: white;
    color: var(--primary);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    padding: 40px 0;
    background: var(--secondary);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

.footer p {
    font-size: 0.9rem;
}

.footer-note {
    margin-top: 8px;
    font-size: 0.85rem;
    opacity: 0.7;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--surface);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(20px) scale(0.95);
    transition: all 0.3s ease;
}

.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--background);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.modal-content {
    padding: 40px;
}

.modal-header {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 24px;
}

.modal-avatar {
    width: 72px;
    height: 72px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    font-weight: 700;
    flex-shrink: 0;
}

img.modal-avatar {
    width: auto;
    min-width: 72px;
    max-width: 120px;
    height: 72px;
    object-fit: contain;
    background: white;
    border: 1px solid var(--border);
    padding: 6px;
}

.modal-title h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.modal-category {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 14px;
    border-radius: 50px;
}

.modal-section {
    margin-bottom: 24px;
}

.modal-section h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.modal-section p,
.modal-section ul {
    color: var(--text);
    font-size: 0.95rem;
    line-height: 1.7;
}

.modal-section ul {
    list-style: none;
}

.modal-section ul li {
    padding-left: 20px;
    position: relative;
    margin-bottom: 8px;
}

.modal-section ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.modal-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    padding: 12px 24px;
    background: var(--primary-light);
    border-radius: 50px;
    transition: all var(--transition);
}

.modal-link:hover {
    background: var(--primary);
    color: white;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
    color: var(--text);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding: 80px 20px 60px;
    }

    .event-date {
        padding: 10px 24px;
    }

    .date-number {
        font-size: 2rem;
    }

    .event-info {
        flex-direction: column;
        gap: 16px;
    }

    .about, .organizations {
        padding: 60px 0;
    }

    .about h2, .organizations h2 {
        margin-bottom: 40px;
    }

    .filter-tags {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 10px;
        -webkit-overflow-scrolling: touch;
    }

    .filter-tag {
        flex-shrink: 0;
    }

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

    .modal-content {
        padding: 24px;
    }

    .modal-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .cta-section {
        padding: 60px 0;
    }

    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 480px) {
    .search-box input {
        padding: 14px 14px 14px 48px;
    }

    .filter-tag {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .org-card {
        padding: 20px;
    }

    .about-card {
        padding: 24px;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.org-card {
    animation: fadeInUp 0.4s ease forwards;
}

.org-card:nth-child(1) { animation-delay: 0.05s; }
.org-card:nth-child(2) { animation-delay: 0.1s; }
.org-card:nth-child(3) { animation-delay: 0.15s; }
.org-card:nth-child(4) { animation-delay: 0.2s; }
.org-card:nth-child(5) { animation-delay: 0.25s; }
.org-card:nth-child(6) { animation-delay: 0.3s; }