/* ========================================
   IoT Workshop 2025 - Modern Dark Theme
   ======================================== */

/* CSS Variables */
:root {
    /* Colors - Cyberpunk/Tech Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.8);
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6a6a7a;
    
    --accent-primary: #00f5d4;
    --accent-secondary: #7b2cbf;
    --accent-tertiary: #f72585;
    --accent-gradient: linear-gradient(135deg, #00f5d4 0%, #7b2cbf 50%, #f72585 100%);
    --accent-glow: 0 0 30px rgba(0, 245, 212, 0.3);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 245, 212, 0.3);
    
    /* Typography */
    --font-display: 'Sora', sans-serif;
    --font-body: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --section-padding: 120px;
    --container-max: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animated Background */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 245, 212, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 212, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -2;
}

.bg-glow {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(123, 44, 191, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(0, 245, 212, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(247, 37, 133, 0.08) 0%, transparent 50%);
    animation: glowMove 20s ease-in-out infinite alternate;
    pointer-events: none;
    z-index: -1;
}

@keyframes glowMove {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-5%, -5%) rotate(10deg); }
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-primary);
    background: rgba(0, 245, 212, 0.1);
    padding: 8px 16px;
    border-radius: 50px;
    border: 1px solid rgba(0, 245, 212, 0.2);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--text-primary);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.4rem;
}

.logo-icon {
    font-size: 1.8rem;
    color: var(--accent-primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

.logo-text {
    color: var(--text-primary);
}

.logo-text .highlight {
    color: var(--accent-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.btn-register {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    font-weight: 600;
    padding: 10px 24px;
}

.nav-link.btn-register:hover {
    box-shadow: var(--accent-glow);
    transform: translateY(-2px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-base);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(0, 245, 212, 0.1);
    border: 1px solid rgba(0, 245, 212, 0.2);
    padding: 10px 20px;
    border-radius: 50px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-primary);
    margin-bottom: 30px;
    animation: fadeInUp 0.6s ease-out;
}

.pulse {
    width: 10px;
    height: 10px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: pulseDot 1.5s ease-in-out infinite;
}

@keyframes pulseDot {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.5; }
}

/* Countdown Timer */
.countdown {
    display: flex;
    align-items: center;
    /* justify-content: center; */
    gap: 8px;
    margin-bottom: 30px;
    animation: fadeInUp 0.6s ease-out 0.15s both;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(0, 245, 212, 0.08);
    border: 1px solid rgba(0, 245, 212, 0.2);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    min-width: 80px;
    position: relative;
    overflow: hidden;
}

.countdown-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
}

.countdown-number {
    font-family: var(--font-mono);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1;
    text-shadow: 0 0 20px rgba(0, 245, 212, 0.5);
    transition: transform 0.1s ease;
}

.countdown-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 6px;
}

.countdown-separator {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    animation: blink 1s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.countdown-expired {
    background: linear-gradient(135deg, rgba(247, 37, 133, 0.1), rgba(123, 44, 191, 0.1));
    border: 1px solid rgba(247, 37, 133, 0.3);
    border-radius: var(--radius-lg);
    padding: 20px 40px;
    animation: pulse 2s ease-in-out infinite;
}

.countdown-expired span {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-title .line {
    display: block;
    animation: fadeInUp 0.6s ease-out both;
}

.hero-title .line:nth-child(1) { animation-delay: 0.1s; }
.hero-title .line:nth-child(2) { animation-delay: 0.2s; }
.hero-title .line:nth-child(3) { animation-delay: 0.3s; }

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

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px 0;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
    animation: fadeInUp 0.6s ease-out 0.5s both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-primary);
}

.btn-primary:hover {
    box-shadow: var(--accent-glow);
    transform: translateY(-3px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    animation: fadeInUp 0.6s ease-out 0.6s both;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

/* Hero Visual */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
    pointer-events: none;
    display: none;
}

@media (min-width: 1200px) {
    .hero-visual {
        display: block;
    }
    
    .hero-content {
        text-align: left;
        transform: translateX(-20%);
    }
    
    .hero-cta {
        justify-content: flex-start;
    }
    
    .hero-stats {
        justify-content: flex-start;
    }
}

.floating-cards {
    position: relative;
    width: 100%;
    height: 100%;
}

.card-item {
    position: absolute;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 15px 20px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    animation: float 6s ease-in-out infinite;
    white-space: nowrap;
}

.card-icon {
    font-size: 1.2rem;
}

.card-1 { top: 10%; left: 10%; animation-delay: 0s; }
.card-2 { top: 25%; right: 5%; animation-delay: 1s; }
.card-3 { top: 50%; left: 0; animation-delay: 2s; }
.card-4 { top: 70%; right: 10%; animation-delay: 3s; }
.card-5 { bottom: 5%; left: 20%; animation-delay: 4s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.circuit-animation {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    opacity: 0.3;
}

.circuit-svg {
    width: 100%;
    height: 100%;
}

.circuit-ring {
    fill: none;
    stroke: var(--accent-primary);
    stroke-width: 1;
    stroke-dasharray: 10 5;
}

.ring-1 { animation: rotateRing 30s linear infinite; }
.ring-2 { animation: rotateRing 20s linear infinite reverse; }
.ring-3 { animation: rotateRing 15s linear infinite; }

@keyframes rotateRing {
    from { transform-origin: center; transform: rotate(0deg); }
    to { transform-origin: center; transform: rotate(360deg); }
}

.circuit-center {
    fill: var(--accent-primary);
    animation: pulseDot 2s ease-in-out infinite;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-primary), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ========================================
   About Section
   ======================================== */
.about {
    padding: var(--section-padding) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
}

.about-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.card-icon-wrap {
    width: 60px;
    height: 60px;
    background: rgba(0, 245, 212, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

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

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

.about-features {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 48px;
}

.feature-main h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-align: center;
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-tertiary);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.tech-item:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 245, 212, 0.05);
}

.tech-icon {
    font-size: 1.4rem;
}

.tech-name {
    font-weight: 500;
    font-size: 0.95rem;
}

/* ========================================
   Schedule Section
   ======================================== */
.schedule {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.schedule-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.tab-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 14px 28px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tab-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: none;
}

.schedule-day {
    display: none;
}

.schedule-day.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.schedule-item {
    display: grid;
    grid-template-columns: 120px 1fr auto;
    gap: 24px;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 16px;
    transition: var(--transition-fast);
}

.schedule-item:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

.time {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent-primary);
    font-weight: 500;
}

.event h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.event p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.event-tag {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 6px 12px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

.event-tag.workshop {
    background: rgba(0, 245, 212, 0.15);
    color: var(--accent-primary);
}

.event-tag.break {
    background: rgba(247, 37, 133, 0.15);
    color: var(--accent-tertiary);
}

/* ========================================
   Speakers Section
   ======================================== */
.speakers {
    padding: var(--section-padding) 0;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.speaker-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-base);
}

.speaker-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-8px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.speaker-image {
    position: relative;
    height: 200px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.speaker-placeholder {
    font-size: 5rem;
    opacity: 0.8;
}

.speaker-social {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 15px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    transform: translateY(100%);
    transition: var(--transition-base);
}

.speaker-card:hover .speaker-social {
    transform: translateY(0);
}

.speaker-social a {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.speaker-social a:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.speaker-info {
    padding: 24px;
    text-align: center;
}

.speaker-info h4 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.speaker-role {
    display: block;
    font-size: 0.9rem;
    color: var(--accent-primary);
    margin-bottom: 4px;
}

.speaker-company {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ========================================
   Sponsors Section
   ======================================== */
.sponsors {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
    overflow: hidden;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-top: 16px;
}

.sponsor-tier {
    margin-bottom: 50px;
}

.tier-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.tier-icon {
    font-size: 1.3rem;
}

.sponsor-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.sponsor-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.sponsor-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition-base);
}

.sponsor-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.sponsor-card:hover::before {
    opacity: 0.05;
}

.sponsor-logo {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-placeholder {
    font-family: var(--font-display);
    font-weight: 700;
    text-align: center;
    line-height: 1.2;
    color: var(--text-primary);
    opacity: 0.7;
    transition: var(--transition-fast);
}

.sponsor-card:hover .logo-placeholder {
    opacity: 1;
    color: var(--accent-primary);
}

/* Platinum Sponsors - Largest */
.sponsor-grid.platinum .sponsor-card {
    width: 220px;
    height: 120px;
    border-color: rgba(0, 245, 212, 0.3);
}

.sponsor-grid.platinum .logo-placeholder {
    font-size: 1.4rem;
}

/* Gold Sponsors */
.sponsor-grid.gold .sponsor-card {
    width: 180px;
    height: 100px;
    border-color: rgba(255, 215, 0, 0.2);
}

.sponsor-grid.gold .logo-placeholder {
    font-size: 1.2rem;
}

/* Silver Sponsors */
.sponsor-grid.silver .sponsor-card {
    width: 150px;
    height: 85px;
}

.sponsor-grid.silver .logo-placeholder {
    font-size: 1rem;
}

/* Media Partners - Smallest */
.sponsor-grid.media .sponsor-card {
    width: 130px;
    height: 75px;
}

.sponsor-grid.media .logo-placeholder {
    font-size: 0.85rem;
}

/* Sponsor CTA */
.sponsor-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    background: linear-gradient(135deg, rgba(0, 245, 212, 0.08), rgba(123, 44, 191, 0.08));
    border: 1px solid rgba(0, 245, 212, 0.2);
    border-radius: var(--radius-xl);
    padding: 40px 50px;
    margin-top: 60px;
}

.cta-content {
    text-align: left;
}

.cta-content h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.cta-content p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Sponsor Marquee Animation (optional) */
@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ========================================
   Pricing Section
   ======================================== */
.pricing {
    padding: var(--section-padding) 0;
}

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

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
    position: relative;
    transition: var(--transition-base);
}

.pricing-card:hover {
    border-color: rgba(0, 245, 212, 0.5);
    transform: translateY(-5px);
}

.pricing-card.featured {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(0, 245, 212, 0.05) 0%, rgba(123, 44, 191, 0.05) 100%);
}

.featured-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gradient);
    color: var(--bg-primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 20px;
    border-radius: 50px;
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
}

.pricing-header h3 {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.price {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 4px;
}

.currency {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.amount {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.price-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li.disabled {
    color: var(--text-muted);
}

.check {
    color: var(--accent-primary);
    font-weight: bold;
}

.cross {
    color: var(--text-muted);
}

.pricing-card .btn {
    width: 100%;
    justify-content: center;
}

/* ========================================
   Registration Section
   ======================================== */
.register {
    padding: var(--section-padding) 0;
}

.register-cta-wrapper {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.register-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin: 50px 0;
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px 24px;
    text-align: center;
    transition: var(--transition-base);
}

.info-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
}

.info-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 16px;
}

.info-card h4 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

.register-cta-btn {
    margin-top: 40px;
}

.btn-large {
    padding: 20px 48px;
    font-size: 1.15rem;
}

.cta-note {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 16px;
}

/* Old form styles - keep for reference */
.register-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.register-info .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.register-info > p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.register-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.feature-icon {
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    background: rgba(0, 245, 212, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-item h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.feature-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.register-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 245, 212, 0.1);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23a0a0b0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.form-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 16px;
}

/* ========================================
   FAQ Section
   ======================================== */
.faq {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition-fast);
}

.faq-item:hover {
    border-color: rgba(0, 245, 212, 0.3);
}

.faq-item.active {
    border-color: var(--accent-primary);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--accent-primary);
    transition: var(--transition-base);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--text-muted);
    margin: 20px 0;
    max-width: 300px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 44px;
    height: 44px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-social a:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 245, 212, 0.1);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }
    
    .register-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .register-info .section-title {
        text-align: center;
    }
    
    .register-info .section-tag {
        display: block;
        text-align: center;
    }
    
    .register-info > p {
        text-align: center;
    }
    
    .register-features {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .feature-item {
        flex-basis: 200px;
        text-align: center;
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--bg-secondary);
        border-left: 1px solid var(--border-color);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 24px;
        transition: var(--transition-base);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .stat-divider {
        width: 40px;
        height: 1px;
    }
    
    .schedule-item {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .schedule-item .time {
        text-align: left;
    }
    
    .event-tag {
        justify-self: start;
    }
    
    /* Sponsors Mobile */
    .sponsor-cta {
        flex-direction: column;
        gap: 24px;
        padding: 30px 24px;
        text-align: center;
    }
    
    .cta-content {
        text-align: center;
    }
    
    .sponsor-grid.platinum .sponsor-card,
    .sponsor-grid.gold .sponsor-card {
        width: 140px;
        height: 80px;
    }
    
    .sponsor-grid.platinum .logo-placeholder,
    .sponsor-grid.gold .logo-placeholder {
        font-size: 1rem;
    }
    
    .sponsor-grid.silver .sponsor-card,
    .sponsor-grid.media .sponsor-card {
        width: 100px;
        height: 60px;
    }
    
    .sponsor-grid.silver .logo-placeholder,
    .sponsor-grid.media .logo-placeholder {
        font-size: 0.75rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .footer-brand p {
        max-width: 100%;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .btn {
        padding: 14px 24px;
        font-size: 0.95rem;
    }
    
    .pricing-card {
        padding: 30px 24px;
    }
    
    .amount {
        font-size: 2.4rem;
    }
    
    .register-form {
        padding: 30px 20px;
    }
    
    .schedule-tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
    }
    
    /* Countdown Mobile */
    .countdown {
        gap: 4px;
    }
    
    .countdown-item {
        padding: 12px 10px;
        min-width: 60px;
    }
    
    .countdown-number {
        font-size: 1.5rem;
    }
    
    .countdown-label {
        font-size: 0.65rem;
    }
    
    .countdown-separator {
        font-size: 1.5rem;
    }
}

/* Animations for elements entering viewport */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Selection color */
::selection {
    background: rgba(0, 245, 212, 0.3);
    color: var(--text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}