:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --accent-color: #ff3333;
    --border-color: #000000;
    --font-heading: 'Oswald', sans-serif;
    --font-mono: 'Space Mono', monospace;
    --container-width: 1400px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-mono);
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    border-bottom: 3px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--bg-color);
    z-index: 1000;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.9rem;
}

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

.btn-nav {
    background: var(--text-color);
    color: var(--bg-color) !important;
    padding: 10px 20px;
    text-decoration: none !important;
}

.btn-nav:hover {
    background: var(--accent-color);
}

/* Hero */
.hero {
    height: 90vh;
    position: relative;
    border-bottom: 3px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.2);
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
    max-width: 900px;
}

.date-badge {
    background: var(--accent-color);
    color: #fff;
    padding: 5px 15px;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 20px;
}

.hero-content h1 {
    font-family: var(--font-heading);
    font-size: 6rem;
    line-height: 0.9;
    text-transform: uppercase;
    margin-bottom: 30px;
}

.lead {
    font-size: 1.2rem;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn-primary {
    display: inline-block;
    background: #fff;
    color: #000;
    padding: 20px 40px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    text-transform: uppercase;
    border: 3px solid transparent;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: var(--accent-color);
    color: #fff;
    border-color: #fff;
}

/* About */
.about {
    padding: 100px 0;
    border-bottom: 3px solid var(--border-color);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-family: var(--font-heading);
    font-size: 4rem;
    line-height: 1;
    margin-bottom: 30px;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.features {
    list-style: none;
    border-top: 2px solid var(--border-color);
}

.features li {
    padding: 15px 0;
    border-bottom: 1px solid #ccc;
    display: flex;
    justify-content: space-between;
    font-size: 1.1rem;
}

.features strong {
    color: var(--accent-color);
    font-size: 1.5rem;
}

.about-img {
    position: relative;
    border: 3px solid var(--border-color);
    box-shadow: 10px 10px 0 var(--border-color);
}

.about-img img {
    filter: grayscale(100%);
}

.caption {
    position: absolute;
    bottom: 0;
    right: 0;
    background: var(--text-color);
    color: #fff;
    padding: 5px 10px;
    font-size: 0.8rem;
    text-transform: uppercase;
}

/* Speakers */
.speakers {
    padding: 100px 0;
    background: #f4f4f4;
    border-bottom: 3px solid var(--border-color);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    text-align: center;
    margin-bottom: 60px;
    text-transform: uppercase;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.speaker-card {
    background: #fff;
    border: 3px solid var(--border-color);
    transition: transform 0.3s;
}

.speaker-card:hover {
    transform: translate(-10px, -10px);
    box-shadow: 10px 10px 0 var(--accent-color);
}

.speaker-img {
    height: 350px;
    overflow: hidden;
    border-bottom: 3px solid var(--border-color);
}

.speaker-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter 0.3s;
}

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

.speaker-card h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin: 20px;
    margin-bottom: 5px;
}

.speaker-card .role {
    display: block;
    margin: 0 20px;
    color: var(--accent-color);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.speaker-card p {
    margin: 0 20px 20px;
    font-style: italic;
    color: #666;
}

/* Tickets */
.tickets {
    padding: 100px 0;
    background: #111;
    color: #fff;
}

.tickets .section-title {
    color: #fff;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    align-items: center;
}

.pricing-card {
    background: #fff;
    color: #000;
    border: 3px solid #fff;
    padding: 40px;
    text-align: center;
}

.pricing-card.featured {
    transform: scale(1.05);
    border-color: var(--accent-color);
    box-shadow: 0 0 30px rgba(255, 51, 51, 0.3);
    position: relative;
    z-index: 1;
}

.card-header {
    border-bottom: 2px solid #000;
    padding-bottom: 20px;
    margin-bottom: 30px;
}

.pricing-card h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 10px;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
}

.benefits {
    list-style: none;
    margin-bottom: 40px;
    text-align: left;
}

.benefits li {
    margin-bottom: 15px;
    padding-left: 25px;
    position: relative;
}

.benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.btn-buy {
    display: block;
    width: 100%;
    padding: 15px;
    background: #000;
    color: #fff;
    border: none;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    cursor: pointer;
    transition: background 0.3s;
    text-align: center;
    text-decoration: none;
}

.btn-buy:hover {
    background: var(--accent-color);
    color: #fff;
}

.tag {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-color);
    color: #fff;
    padding: 5px 15px;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    border-top: 3px solid #fff;
    padding: 60px 0;
    background: #000;
    color: #fff;
}

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

.footer-logo {
    font-family: var(--font-heading);
    font-size: 2rem;
}

.footer-links a {
    margin-left: 30px;
    font-size: 0.9rem;
    color: #999;
}

.footer-links a:hover {
    color: #fff;
}

.copyright {
    color: #666;
    font-size: 0.8rem;
}

/* Contact */
.contact {
    padding: 100px 0;
    background: var(--bg-color);
    border-top: 3px solid var(--border-color);
}

.contact-box {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    border: 3px solid var(--border-color);
    background: #f9f9f9;
}

.contact-details h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.contact-details a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 900px) {
    .hero-content h1 { font-size: 4rem; }
    .about-grid { grid-template-columns: 1fr; }
    .pricing-card.featured { transform: scale(1); }
    .footer-content { flex-direction: column; gap: 30px; text-align: center; }
    .footer-links a { margin: 0 10px; }
}