/* ===== VARIABLES ===== */
:root {
    --black: #0a0a0a;
    --dark-gray: #1a1a1a;
    --medium-gray: #2d2d2d;
    --gray: #888888;
    --light-gray: #e0e0e0;
    --white: #ffffff;
    --yellow: #ffc20e;
    --yellow-hover: #ffd700;
    --yellow-dim: rgba(245, 197, 24, 0.1);
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'open-sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--black);
    color: var(--white);
    overflow-x: hidden;
}
h1 {font-family: komet, -apple-system, BlinkMacSystemFont, sans-serif; }
h2 {font-family: komet, -apple-system, BlinkMacSystemFont, sans-serif; }

/* ===== UTILITY CLASSES ===== */
.text-yellow {
    color: var(--yellow) !important;
}

.text-gray {
    color: var(--gray) !important;
}

.text-light-gray {
    color: var(--light-gray) !important;
}

.bg-yellow {
    background-color: var(--yellow) !important;
}

.btn-yellow {
    background-color: var(--yellow);
    color: var(--black);
    border: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-yellow:hover {
    background-color: var(--yellow-hover);
    color: var(--black);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245, 197, 24, 0.3);
}

.fw-900 {
    font-weight: 900;
}

/* ===== NAVBAR ===== 
.navbar {
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(245, 197, 24, 0.1);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar-brand {
    font-size: 1.5rem;
    letter-spacing: 2px;
}

.nav-link {
    color: var(--light-gray) !important;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 1rem !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--yellow) !important;
}
*/

/* ===== HERO SECTION ===== */
.hero-section {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--black) 0%, var(--dark-gray) 50%, var(--black) 100%);
    padding-top: 100px;
}

.vector-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.vector-pattern {
    width: 100%;
    height: 100%;
}

.hero-title {
    letter-spacing: -2px;
    line-height: 1.1;
}

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

.stat-label {
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Pulse animation for nodes */
.pulse-node {
    animation: pulse 3s ease-in-out infinite;
}

.pulse-node:nth-child(2) { animation-delay: 0.5s; }
.pulse-node:nth-child(3) { animation-delay: 1s; }
.pulse-node:nth-child(4) { animation-delay: 1.5s; }
.pulse-node:nth-child(5) { animation-delay: 2s; }

@keyframes pulse {
    0%, 100% { opacity: 0.3; r: 3; }
    50% { opacity: 0.8; r: 5; }
}

/* Hero vector graphic animations */
.modular-graphic {
    width: 100%;
    max-width: 400px;
    animation: float 6s ease-in-out infinite;
}

.module-center {
    animation: glow 2s ease-in-out infinite;
}

.module-float {
    animation: floatModule 4s ease-in-out infinite;
}

.module-float:nth-child(2) { animation-delay: 1s; }
.module-float:nth-child(3) { animation-delay: 2s; }
.module-float:nth-child(4) { animation-delay: 3s; }

.orbit-ring {
    animation: rotate 20s linear infinite;
    transform-origin: 200px 200px;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes floatModule {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

@keyframes glow {
    0%, 100% { stroke-width: 2; }
    50% { stroke-width: 3; stroke: var(--yellow-hover); }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Scroll indicator */
.scroll-indicator {
    animation: bounce 2s infinite;
}

.mouse-icon {
    width: 26px;
    height: 40px;
    border: 2px solid var(--yellow);
    border-radius: 13px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.mouse-wheel {
    width: 4px;
    height: 8px;
    background: var(--yellow);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

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

@keyframes scroll {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(8px); }
}

/* ===== HIGHLIGHTS SECTION ===== */
.highlights-section {
    background: var(--dark-gray);
    position: relative;
}

.highlight-card {
    background: var(--medium-gray);
    border: 1px solid rgba(245, 197, 24, 0.1);
    transition: all 0.4s ease;
}

.highlight-card:hover {
    transform: translateY(-8px);
    border-color: var(--yellow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(245, 197, 24, 0.1);
}

.highlight-card .card-icon svg {
    transition: transform 0.3s ease;
}

.highlight-card:hover .card-icon svg {
    transform: scale(1.1);
}

/* ===== SPEAKERS SECTION ===== */
.speakers-section {
    background: var(--black);
    position: relative;
}

.speakers-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(245, 197, 24, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(245, 197, 24, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.speaker-card {
    background: var(--dark-gray);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.4s ease;
}

.speaker-card:hover {
    transform: translateY(-5px);
    border-color: rgba(245, 197, 24, 0.3);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.speaker-avatar svg {
    transition: transform 0.3s ease;
}

.speaker-card:hover .speaker-avatar svg {
    transform: scale(1.05);
}

/* ===== SCHEDULE SECTION ===== */
.schedule-section {
    background: var(--dark-gray);
}

.schedule-tabs .nav-link {
    background: var(--medium-gray);
    color: var(--gray);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 12px 30px;
    margin: 0 8px;
    transition: all 0.3s ease;
}

.schedule-tabs .nav-link:hover {
    color: var(--white);
    border-color: rgba(245, 197, 24, 0.3);
}

.schedule-tabs .nav-link.active {
    background: var(--yellow);
    color: var(--black);
    border-color: var(--yellow);
}

.schedule-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline-item {
    margin-bottom: 1.5rem;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 16.666%;
    top: 0;
    bottom: -1.5rem;
    width: 2px;
    background: linear-gradient(to bottom, var(--yellow), rgba(245, 197, 24, 0.1));
    transform: translateX(-50%);
}

.timeline-item:last-child::before {
    display: none;
}

.time-badge {
    display: inline-block;
    background: var(--yellow);
    color: var(--black);
    font-weight: 700;
    font-size: 0.85rem;
    padding: 6px 14px;
    border-radius: 20px;
}

.timeline-content {
    background: var(--medium-gray);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    border-color: rgba(245, 197, 24, 0.2);
    transform: translateX(5px);
}

/* ===== FOOTER ===== */
.footer-section {
    background: var(--black);
    border-top: 1px solid rgba(245, 197, 24, 0.1);
    position: relative;
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--medium-gray);
    color: var(--light-gray);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.social-icon:hover {
    background: var(--yellow);
    color: var(--black);
    transform: translateY(-3px);
}

.footer-link {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--yellow);
}

.footer-vector {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    pointer-events: none;
}

/* ===== FORM STYLING ===== */
.form-control:focus {
    border-color: var(--yellow);
    box-shadow: 0 0 0 0.2rem rgba(245, 197, 24, 0.15);
}

.form-control::placeholder {
    color: var(--gray);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 991px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-stats {
        gap: 2rem !important;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
}

@media (max-width: 767px) {
    .hero-section {
        padding-top: 80px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-badge {
        display: inline-block;
    }

    .d-flex.flex-wrap.gap-3 {
        justify-content: center;
    }

    .timeline-item::before {
        display: none;
    }

    .schedule-tabs .nav-link {
        padding: 10px 20px;
        margin: 4px;
    }
}

/* ===== ANIMATIONS ON SCROLL ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Z-INDEX ===== */
.z-1 {
    z-index: 1;
}