:root {
    --primary: #1a1a2e;
    --accent: #0f4c75;
    --highlight: #3282b8;
    --light: #bbe1fa;
    --text: #2c3e50;
    --background: #fafbfc;
    --card-bg: #ffffff;
}

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

body {
    font-family: 'Work Sans', -apple-system, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Animated background */
.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background:
            linear-gradient(135deg, var(--background) 0%, #e8f4f8 100%);
    opacity: 0;
    animation: fadeIn 1s ease-out forwards;
}

.bg-pattern::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    animation: float 20s infinite ease-in-out;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-30px, 30px) rotate(2deg); }
}

/* Header */
header {
    padding: 4rem 0 2rem;
    opacity: 0;
    animation: slideDown 0.8s ease-out 0.2s forwards;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.date-badge {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    background: rgba(15, 76, 117, 0.08);
    padding: 0.5rem 1.2rem;
    border-radius: 30px;
    margin-bottom: 1.5rem;
    letter-spacing: 0.5px;
    border: 1px solid rgba(15, 76, 117, 0.15);
}

h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    color: var(--primary);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

/* Banner Image */
.banner-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.3s forwards;
}

.subtitle {
    font-size: 1.3rem;
    color: var(--highlight);
    font-weight: 300;
    margin-bottom: 3rem;
}

/* Main content */
main {
    padding: 2rem 0 4rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.info-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02), 0 12px 24px rgba(0, 0, 0, 0.04);
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.04), 0 16px 32px rgba(0, 0, 0, 0.08);
}

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

.info-card:nth-child(1) {
    animation-delay: 0.3s;
}

.info-card:nth-child(2) {
    animation-delay: 0.4s;
}

.info-card:nth-child(3) {
    animation-delay: 0.5s;
}

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

.card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.info-card h3 {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.info-card p {
    font-size: 1.1rem;
    color: var(--text);
    line-height: 1.8;
}

.info-card strong {
    color: var(--primary);
    font-weight: 500;
}

/* Schedule section */
.schedule {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 16px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02), 0 12px 24px rgba(0, 0, 0, 0.04);
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 0.6s forwards;
}

.schedule h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 2rem;
    font-weight: 700;
}

.schedule-item {
    padding: 1.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 2rem;
    align-items: start;
}

.schedule-item:last-child {
    border-bottom: none;
}

.schedule-date {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 600;
    color: var(--accent);
    font-size: 0.95rem;
}

.schedule-details h4 {
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.schedule-details p {
    color: var(--text);
    opacity: 0.8;
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 16px;
    margin-bottom: 3rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 0.7s forwards;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    animation: float 15s infinite linear;
}

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

.cta-section h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: white;
    margin-bottom: 1rem;
    font-weight: 700;
}

.cta-section p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: white;
    color: var(--primary);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: var(--light);
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem 0;
    color: var(--text);
    opacity: 0.7;
    font-size: 0.95rem;
}

footer p {
    margin-bottom: 0.5rem;
}

.highlight-box {
    background: rgba(50, 130, 184, 0.08);
    border-left: 4px solid var(--highlight);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 4px;
}

.highlight-box p {
    margin: 0;
    font-weight: 500;
    color: var(--accent);
}

/* Details Section (Accommodation & Venue) */
.details-section {
    margin-bottom: 3rem;
}

.detail-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02), 0 12px 24px rgba(0, 0, 0, 0.04);
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
    border-left: 4px solid var(--highlight);
}

.detail-card:nth-of-type(1) {
    animation-delay: 0.8s;
}

.detail-card:nth-of-type(2) {
    animation-delay: 0.9s;
}

.detail-card h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1.25rem;
    font-weight: 700;
}

.detail-card p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text);
    margin-bottom: 1rem;
}

.detail-card p:last-child {
    margin-bottom: 0;
}

.detail-card a {
    color: var(--highlight);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid transparent;
    transition: border-bottom-color 0.2s ease;
}

.detail-card a:hover {
    border-bottom-color: var(--highlight);
}

/* Organizers Section */
.organizers-section {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 16px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02), 0 12px 24px rgba(0, 0, 0, 0.04);
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 1s forwards;
}

.organizers-section h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.organizers-list {
    margin-bottom: 1.5rem;
}

.organizer {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.organizer::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--highlight);
    font-weight: bold;
}

.contact-email {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.contact-email p {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.95rem;
    color: var(--text);
}

.contact-email a {
    color: var(--highlight);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid transparent;
    transition: border-bottom-color 0.2s ease;
}

.contact-email a:hover {
    border-bottom-color: var(--highlight);
}

@media (max-width: 768px) {
    .schedule-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .cta-section {
        padding: 3rem 1.5rem;
    }

    h1 {
        font-size: 2.5rem;
    }
}