:root {
    --primary: #2d3436;
    --accent: #0984e3;
    --accent-glow: #74b9ff;
    --dark: #000000;
    --light: #ffffff;
    --font-head: 'Chakra Petch', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background-color: var(--dark);
    color: var(--light);
    font-family: var(--font-body);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1540575467063-17e6fc8c62d8?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    min-height: 100vh;
    border-bottom: 4px solid var(--accent);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
}

.logo {
    font-family: var(--font-head);
    font-size: 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
}

.year {
    color: var(--accent);
}

.nav-links a {
    color: white;
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.9rem;
    transition: 0.3s;
}

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

.btn-ticket {
    border: 2px solid var(--accent);
    padding: 0.5rem 1.5rem;
    color: var(--accent) !important;
}

.btn-ticket:hover {
    background: var(--accent);
    color: white !important;
}

/* Hero */
.hero {
    display: flex;
    align-items: center;
    min-height: 80vh;
}

.hero-content {
    flex: 1;
}

.date-badge {
    display: inline-flex;
    flex-direction: column;
    background: var(--accent);
    padding: 1rem;
    text-align: center;
    font-family: var(--font-head);
    font-weight: 700;
    margin-bottom: 2rem;
    line-height: 1;
}

.month {
    font-size: 1.2rem;
}

.day {
    font-size: 2rem;
}

h1 {
    font-family: var(--font-head);
    font-size: 5rem;
    line-height: 1;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.hero p {
    font-size: 1.25rem;
    max-width: 500px;
    margin-bottom: 3rem;
    color: #dfe6e9;
}

.hero-btns {
    display: flex;
    gap: 1rem;
}

.btn-primary {
    background: var(--accent);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    font-weight: 700;
    text-transform: uppercase;
    font-family: var(--font-head);
    letter-spacing: 1px;
    transition: 0.3s;
}

.btn-primary:hover {
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-secondary {
    border: 1px solid white;
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    font-weight: 700;
    text-transform: uppercase;
    font-family: var(--font-head);
    transition: 0.3s;
}

.btn-secondary:hover {
    background: white;
    color: black;
}

/* Speakers */
.speakers-section {
    padding: 8rem 0;
    background: #111;
}

.section-title {
    margin-bottom: 4rem;
}

.section-title h2 {
    font-family: var(--font-head);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.title-line {
    width: 50px;
    height: 4px;
    background: var(--accent);
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.speaker-card {
    background: #1a1a1a;
    border: 1px solid #333;
    transition: 0.3s;
}

.speaker-card:hover {
    border-color: var(--accent);
    transform: translateY(-10px);
}

.speaker-img {
    height: 300px;
    background-color: #333;
    position: relative;
    overflow: hidden;
}

/* Grayscale effect on images */
.speaker-img {
    filter: grayscale(100%);
    transition: 0.3s;
    background-size: cover;
    background-position: center;
}

.speaker-card:hover .speaker-img {
    filter: grayscale(0%);
}

.s1 {
    background-image: url('https://images.unsplash.com/photo-1544005313-94ddf0286df2?ixlib=rb-1.2.1&auto=format&fit=crop&w=634&q=80');
}

.s2 {
    background-image: url('https://images.unsplash.com/photo-1507003211169-0a1dd7228f2d?ixlib=rb-1.2.1&auto=format&fit=crop&w=634&q=80');
}

.s3 {
    background-image: url('https://images.unsplash.com/photo-1573496359142-b8d87734a5a2?ixlib=rb-1.2.1&auto=format&fit=crop&w=634&q=80');
}

.s4 {
    background-image: url('https://images.unsplash.com/photo-1560250097-0b93528c311a?ixlib=rb-1.2.1&auto=format&fit=crop&w=634&q=80');
}


.speaker-info {
    padding: 1.5rem;
}

.speaker-info h3 {
    font-family: var(--font-head);
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.role {
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.topic {
    font-style: italic;
    color: #888;
    font-size: 0.9rem;
}

/* Schedule */
.schedule-section {
    padding: 8rem 0;
}

.schedule-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 4rem;
}

.tab {
    padding: 1rem 3rem;
    border: 1px solid #333;
    cursor: pointer;
    font-family: var(--font-head);
    font-weight: 600;
    text-transform: uppercase;
}

.tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.timeline {
    border-left: 2px solid #333;
    padding-left: 2rem;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    gap: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.4rem;
    top: 0;
    width: 1rem;
    height: 1rem;
    background: var(--accent);
    border-radius: 50%;
}

.time {
    min-width: 100px;
    color: #888;
    font-family: var(--font-head);
}

.event-card {
    background: #111;
    padding: 2rem;
    flex: 1;
    border: 1px solid #333;
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 1rem;
}

.keynote {
    background: #e84393;
}

.tech {
    background: #0984e3;
}

.workshop {
    background: #00b894;
}

.panel {
    background: #6c5ce7;
}

.event-card h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.event-card p {
    color: #888;
}

/* Tickets */
.tickets-section {
    padding: 8rem 0;
    background: #111;
}

.ticket-wrapper {
    display: flex;
    align-items: center;
    background: var(--accent);
    border-radius: 4px;
    overflow: hidden;
}

.ticket-info {
    flex: 2;
    padding: 4rem;
    color: white;
}

.ticket-info h2 {
    font-family: var(--font-head);
    font-size: 3rem;
    margin-bottom: 1rem;
}

.price-card {
    flex: 1;
    background: white;
    color: black;
    padding: 3rem;
    text-align: center;
    margin: 1rem;
    border-radius: 4px;
}

.price-header {
    font-weight: 700;
    color: #666;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.price-amount {
    font-size: 4rem;
    font-family: var(--font-head);
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--accent);
}

.price-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}

.price-features li {
    margin-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.5rem;
}

.btn-full {
    display: block;
    width: 100%;
}

/* Footer */
.footer {
    padding: 3rem 0;
    border-top: 1px solid #333;
}

.footer-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.f-brand {
    font-family: var(--font-head);
    font-size: 1.25rem;
}

.f-links a {
    color: #888;
    text-decoration: none;
    margin-left: 2rem;
    font-size: 0.9rem;
}

.f-links a:hover {
    color: white;
}

@media (max-width: 900px) {
    h1 {
        font-size: 3.5rem;
    }

    .nav-links {
        display: none;
    }

    .ticket-wrapper {
        flex-direction: column;
    }

    .price-card {
        width: 100%;
        margin: 0;
    }

    .timeline-item {
        flex-direction: column;
        gap: 0.5rem;
    }
}