/* ===================================
   CSS Variables & Root Styles
   =================================== */
:root {
    /* Primary Colors from Palette */
    --white: #FFFFFF;
    --ice-blue: #EAF1FF;
    --royal-blue: #1F5EFF;
    --deep-blue: #0967D2;
    --cyan: #00A3FF;
    --lavender: #6E7DFF;
    --slate-blue: #5A6A8F;
    --light-periwinkle: #D6E2FF;
    --bright-blue: #1F5EFF;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #00A3FF 0%, #6E7DFF 100%);
    --gradient-hero: linear-gradient(135deg, #0967D2 0%, #1F5EFF 50%, #6E7DFF 100%);
    --gradient-card: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    
    /* Spacing */
    --section-padding: 120px;
    --container-width: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(9, 103, 210, 0.1);
    --shadow-md: 0 4px 20px rgba(9, 103, 210, 0.15);
    --shadow-lg: 0 8px 40px rgba(9, 103, 210, 0.2);
    --shadow-glow: 0 0 40px rgba(0, 163, 255, 0.3);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* ===================================
   Preloader
   =================================== */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.brain-loader {
    position: relative;
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
}

.brain-loader .neuron {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--white);
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

.brain-loader .neuron:nth-child(1) {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.brain-loader .neuron:nth-child(2) {
    bottom: 10px;
    left: 10px;
    animation-delay: 0.3s;
}

.brain-loader .neuron:nth-child(3) {
    bottom: 10px;
    right: 10px;
    animation-delay: 0.6s;
}

.brain-loader .pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: ripple 1.5s ease-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.7;
    }
}

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

#preloader p {
    color: var(--white);
    font-size: 14px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* ===================================
   Container
   =================================== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

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

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    transition: var(--transition-fast);
}

#navbar.scrolled .logo {
    color: var(--deep-blue);
}

.logo .year {
    color: var(--cyan);
}

.brain-icon {
    transition: var(--transition-fast);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    padding: 5px 0;
}

#navbar.scrolled .nav-link {
    color: var(--slate-blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--cyan);
    transition: var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link.btn-register {
    background: var(--white);
    color: var(--deep-blue);
    padding: 10px 24px;
    border-radius: 30px;
    font-weight: 600;
}

.nav-link.btn-register::after {
    display: none;
}

.nav-link.btn-register:hover {
    background: var(--cyan);
    color: var(--white);
    transform: translateY(-2px);
}

#navbar.scrolled .nav-link.btn-register {
    background: var(--gradient-primary);
    color: var(--white);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: var(--transition-fast);
}

#navbar.scrolled .hamburger span {
    background: var(--deep-blue);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition-medium);
    cursor: pointer;
}

.btn-primary {
    background: var(--white);
    color: var(--deep-blue);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--deep-blue);
    border: 2px solid var(--deep-blue);
}

.btn-outline:hover {
    background: var(--deep-blue);
    color: var(--white);
}

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

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 100px 20px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
}

.neural-network {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.3;
}

.gradient-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 30%;
    background: linear-gradient(to top, rgba(255, 255, 255, 0.1), transparent);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 50px;
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 30px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(40px, 8vw, 72px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--white);
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.title-line {
    display: block;
}

.title-highlight {
    display: block;
    background: linear-gradient(90deg, var(--cyan), var(--lavender));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    max-width: 600px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    color: var(--white);
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.countdown {
    display: flex;
    justify-content: center;
    gap: 30px;
    animation: fadeInUp 0.8s ease 1s both;
}

.countdown-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 20px 30px;
    border-radius: 16px;
    min-width: 100px;
}

.countdown-number {
    display: block;
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    color: var(--white);
}

.countdown-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    animation: bounce 2s infinite;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(15px);
    }
}

/* ===================================
   Section Styles
   =================================== */
section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    background: var(--light-periwinkle);
    color: var(--deep-blue);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    color: var(--deep-blue);
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--slate-blue);
}

/* ===================================
   About Section
   =================================== */
.about {
    background: var(--ice-blue);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.about-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-medium);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.card-icon i {
    font-size: 28px;
    color: var(--white);
}

.about-card h3 {
    font-family: var(--font-display);
    font-size: 22px;
    color: var(--deep-blue);
    margin-bottom: 16px;
}

.about-card p {
    color: var(--slate-blue);
    line-height: 1.7;
}

.about-video {
    max-width: 800px;
    margin: 0 auto;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    color: var(--white);
    cursor: pointer;
    transition: var(--transition-medium);
}

.video-placeholder:hover {
    background: var(--deep-blue);
}

.video-placeholder i {
    font-size: 60px;
    opacity: 0.9;
}

.video-placeholder span {
    font-size: 18px;
    font-weight: 500;
}

/* ===================================
   Tracks Section
   =================================== */
.tracks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.track-card {
    background: var(--white);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.track-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition-medium);
}

.track-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--cyan);
}

.track-card:hover::before {
    transform: scaleX(1);
}

.track-icon {
    width: 80px;
    height: 80px;
    background: var(--light-periwinkle);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: var(--transition-medium);
}

.track-card:hover .track-icon {
    background: var(--gradient-primary);
}

.track-icon i {
    font-size: 32px;
    color: var(--deep-blue);
    transition: var(--transition-medium);
}

.track-card:hover .track-icon i {
    color: var(--white);
}

.track-content h3 {
    font-family: var(--font-display);
    font-size: 24px;
    color: var(--deep-blue);
    margin-bottom: 16px;
}

.track-content p {
    color: var(--slate-blue);
    margin-bottom: 20px;
    line-height: 1.7;
}

.track-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}

.track-tags li {
    background: var(--ice-blue);
    color: var(--deep-blue);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

.track-prize {
    padding-top: 20px;
    border-top: 1px solid var(--light-periwinkle);
}

.track-prize span {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--cyan);
}

.track-prize small {
    display: block;
    color: var(--slate-blue);
    font-size: 13px;
    margin-top: 4px;
}

/* ===================================
   Schedule Section
   =================================== */
.schedule {
    background: var(--ice-blue);
}

.schedule-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.tab-btn {
    background: var(--white);
    padding: 20px 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-medium);
    text-align: center;
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--gradient-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.tab-day {
    display: block;
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    color: var(--deep-blue);
    margin-bottom: 4px;
}

.tab-btn:hover .tab-day,
.tab-btn.active .tab-day {
    color: var(--white);
}

.tab-date {
    font-size: 14px;
    color: var(--slate-blue);
}

.tab-btn:hover .tab-date,
.tab-btn.active .tab-date {
    color: rgba(255, 255, 255, 0.8);
}

.schedule-day {
    display: none;
}

.schedule-day.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 100px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--light-periwinkle);
}

.timeline-item {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 95px;
    top: 30px;
    width: 12px;
    height: 12px;
    background: var(--cyan);
    border-radius: 50%;
    border: 3px solid var(--white);
    box-shadow: var(--shadow-sm);
}

.timeline-time {
    min-width: 80px;
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--deep-blue);
    padding-top: 20px;
}

.timeline-content {
    flex: 1;
    background: var(--white);
    padding: 24px 30px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-medium);
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.event-type {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.event-type.workshop {
    background: var(--light-periwinkle);
    color: var(--deep-blue);
}

.event-type.networking {
    background: #E8F5E9;
    color: #2E7D32;
}

.event-type.hacking {
    background: #FFF3E0;
    color: #E65100;
}

.timeline-content h4 {
    font-family: var(--font-display);
    font-size: 20px;
    color: var(--deep-blue);
    margin-bottom: 8px;
}

.timeline-content p {
    color: var(--slate-blue);
    margin-bottom: 16px;
}

.event-meta {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: var(--slate-blue);
}

.event-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.event-meta i {
    color: var(--cyan);
}

/* ===================================
   Prizes Section
   =================================== */
.prizes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.prize-card {
    background: var(--white);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.prize-card.grand {
    background: var(--gradient-hero);
    transform: scale(1.05);
}

.prize-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.prize-card.grand:hover {
    transform: scale(1.05) translateY(-10px);
}

.prize-badge {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
}

.prize-card:not(.grand) .prize-badge {
    background: var(--light-periwinkle);
    color: var(--deep-blue);
}

.prize-card.grand .prize-badge {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.prize-amount {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.prize-card:not(.grand) .prize-amount {
    color: var(--cyan);
}

.prize-card.grand .prize-amount {
    color: var(--white);
}

.prize-card h3 {
    font-family: var(--font-display);
    font-size: 20px;
    margin-bottom: 24px;
}

.prize-card:not(.grand) h3 {
    color: var(--deep-blue);
}

.prize-card.grand h3 {
    color: rgba(255, 255, 255, 0.9);
}

.prize-perks {
    text-align: left;
}

.prize-perks li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid;
}

.prize-card:not(.grand) .prize-perks li {
    border-color: var(--ice-blue);
    color: var(--slate-blue);
}

.prize-card.grand .prize-perks li {
    border-color: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
}

.prize-perks li:last-child {
    border-bottom: none;
}

.prize-perks i {
    color: var(--cyan);
}

.prize-card.grand .prize-perks i {
    color: var(--white);
}

.track-prizes-title {
    text-align: center;
    font-family: var(--font-display);
    font-size: 28px;
    color: var(--deep-blue);
    margin-bottom: 40px;
}

.track-prizes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.track-prize-card {
    background: var(--white);
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-medium);
}

.track-prize-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.track-prize-card i {
    font-size: 36px;
    color: var(--cyan);
    margin-bottom: 16px;
}

.track-prize-card h4 {
    font-family: var(--font-display);
    font-size: 16px;
    color: var(--deep-blue);
    margin-bottom: 10px;
}

.track-prize-card .amount {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    color: var(--lavender);
}

/* ===================================
   Sponsors Section
   =================================== */
.sponsors {
    background: var(--ice-blue);
}

.sponsors-tiers {
    display: grid;
    gap: 28px;
    margin-bottom: 60px;
}

.sponsor-tier {
    background: var(--white);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(31, 94, 255, 0.08);
}

.sponsor-tier-header {
    margin-bottom: 24px;
}

.sponsor-tier-header p {
    max-width: 720px;
    margin-top: 14px;
    color: var(--slate-blue);
}

.sponsor-tier-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: 999px;
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.sponsor-tier-badge-title {
    background: linear-gradient(135deg, #e6f7ff 0%, #cceeff 100%);
    color: var(--deep-blue);
}

.sponsor-tier-badge-gold {
    background: linear-gradient(135deg, #fff2cc 0%, #ffe08a 100%);
    color: #8a6300;
}

.sponsor-tier-badge-partner {
    background: linear-gradient(135deg, #dcf5ff 0%, #bfeaff 100%);
    color: var(--cyan);
}

.tier-title {
    background: linear-gradient(135deg, #E5E4E2, #A8A9AD);
    color: #4A4A4A;
}

.tier-title.platinum {
    background: linear-gradient(135deg, #E5E4E2, #A8A9AD);
    color: #4A4A4A;
}

.tier-title.gold {
    background: linear-gradient(135deg, #FFD700, #FFA500);
    color: #5D4E37;
}

.tier-title.silver {
    background: linear-gradient(135deg, #C0C0C0, #A8A9AD);
    color: #4A4A4A;
}

.sponsor-logos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
    align-items: stretch;
}

.sponsor-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 140px;
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
    padding: 24px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(31, 94, 255, 0.08);
    transition: var(--transition-medium);
}

.sponsor-logo:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.platinum-logos .sponsor-logo {
    padding: 40px 60px;
}

.sponsor-logo img {
    display: block;
    width: 100%;
    max-height: 82px;
    object-fit: contain;
}

.title-logos {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.gold-logos {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.partner-logos {
    grid-template-columns: minmax(220px, 320px);
    justify-content: center;
}

.sponsor-logo-title img {
    max-height: 88px;
}

.sponsor-logo-gold img {
    max-height: 76px;
}

.sponsor-logo-partner img {
    max-height: 90px;
}

.logo-placeholder {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    color: var(--slate-blue);
}

.platinum-logos .logo-placeholder {
    font-size: 32px;
}

.silver-logos .logo-placeholder {
    font-size: 18px;
}

.sponsor-cta {
    text-align: center;
    background: var(--white);
    padding: 50px;
    border-radius: 24px;
    box-shadow: var(--shadow-sm);
    margin-top: 60px;
}

.sponsor-cta h3 {
    font-family: var(--font-display);
    font-size: 28px;
    color: var(--deep-blue);
    margin-bottom: 16px;
}

.sponsor-cta p {
    color: var(--slate-blue);
    margin-bottom: 24px;
}

/* Sponsorship Table Styles */
.sponsorship-table-wrapper {
    overflow-x: auto;
    margin-bottom: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.sponsorship-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--white);
    border-radius: 16px;
    overflow: hidden;
}

.sponsorship-table thead {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.sponsorship-table th {
    padding: 24px 20px;
    text-align: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    border-bottom: 3px solid #e9ecef;
}

.sponsorship-table th:first-child {
    text-align: left;
    width: 45%;
    background: transparent;
}

.sponsorship-table .tier-name {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.sponsorship-table .tier-price {
    font-size: 16px;
    font-weight: 500;
    opacity: 0.8;
}

.sponsorship-table .tier-silver {
    color: #6c757d;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.sponsorship-table .tier-gold {
    color: #c9a227;
    background: linear-gradient(135deg, #fff9e6 0%, #fff3cc 100%);
}

.sponsorship-table .tier-title {
    color: var(--cyan);
    background: linear-gradient(135deg, #e6f7ff 0%, #cceeff 100%);
}

.sponsorship-table tbody tr {
    transition: var(--transition-fast);
}

.sponsorship-table tbody tr:hover {
    background-color: #f8f9fa;
}

.sponsorship-table td {
    padding: 20px;
    border-bottom: 1px solid #e9ecef;
    font-size: 15px;
    line-height: 1.6;
}

.sponsorship-table td:first-child {
    text-align: left;
    color: var(--slate-blue);
}

.sponsorship-table td strong {
    color: var(--deep-blue);
    font-weight: 600;
}

.sponsorship-table .check-cell {
    text-align: center;
    vertical-align: middle;
}

.sponsorship-table .check {
    font-size: 28px;
    font-weight: bold;
    display: inline-block;
}

.sponsorship-table .check-silver {
    color: #6c757d;
}

.sponsorship-table .check-gold {
    color: #c9a227;
}

.sponsorship-table .check-title {
    color: var(--cyan);
}

.sponsorship-table tbody tr:last-child td {
    border-bottom: none;
}

/* Responsive Table */
@media (max-width: 768px) {
    .sponsorship-table-wrapper {
        border-radius: 12px;
    }

    .sponsor-tier {
        padding: 24px;
    }

    .sponsor-tier-header p {
        margin-top: 12px;
    }

    .title-logos,
    .gold-logos,
    .partner-logos {
        grid-template-columns: 1fr;
    }

    .sponsor-logo {
        min-height: 120px;
    }
    
    .sponsorship-table th,
    .sponsorship-table td {
        padding: 16px 12px;
        font-size: 14px;
    }
    
    .sponsorship-table .tier-name {
        font-size: 18px;
    }
    
    .sponsorship-table .tier-price {
        font-size: 14px;
    }
    
    .sponsorship-table .check {
        font-size: 24px;
    }
}

/* ===================================
   Judges & Mentors Sections
   =================================== */
.judges {
    background: var(--white);
}

.judges-track {
    margin-bottom: 80px;
}

.judges-track:last-child {
    margin-bottom: 0;
}

.track-title {
    font-family: var(--font-display);
    font-size: 28px;
    color: var(--deep-blue);
    margin-bottom: 40px;
    padding-bottom: 15px;
    border-bottom: 3px solid var(--royal-blue);
    display: inline-block;
}

.mentors {
    background: var(--ice-blue);
}

.people-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.person-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-medium);
}

.person-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.person-image {
    height: 200px;
    overflow: hidden;
    background: var(--ice-blue);
    display: flex;
    align-items: center;
    justify-content: center;
}

.person-image:empty::before {
    content: "Photo Coming Soon";
    color: var(--slate-blue);
    font-size: 14px;
    text-align: center;
    font-weight: 500;
}

.person-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-medium);
}

.person-image img.headshot-ewina {
    object-position: center 30%;
}

.person-image img.headshot-phil {
    object-position: center 24%;
}

.person-image img.headshot-lindsey {
    object-position: center 24%;
}

.person-image img.headshot-iakov {
    object-position: center 24%;
}

.person-image img.headshot-christian {
    object-position: center 24%;
}

.person-image img.headshot-ankita {
    object-position: center 24%;
}

.person-image img.headshot-gail {
    object-position: center 24%;
}

.person-image img.headshot-matthew {
    object-position: center 24%;
}

.person-image-placeholder {
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.person-image-placeholder i {
    font-size: 42px;
    color: var(--white);
}

.person-card:hover .person-image img {
    transform: scale(1.05);
}

.person-info {
    padding: 30px;
}

.person-info h4 {
    font-family: var(--font-display);
    font-size: 22px;
    color: var(--deep-blue);
    margin-bottom: 8px;
}

.person-role {
    color: var(--cyan);
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 12px;
}

.person-description {
    color: var(--slate-blue);
    font-size: 14px;
    margin-bottom: 0;
}

/* ===================================
   FAQ Section
   =================================== */
.faq {
    background: var(--ice-blue);
}

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

.faq-item {
    background: var(--white);
    border-radius: 16px;
    margin-bottom: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    padding: 24px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 18px;
    font-weight: 600;
    color: var(--deep-blue);
    text-align: left;
    transition: var(--transition-fast);
}

.faq-question:hover {
    color: var(--cyan);
}

.faq-question i {
    transition: var(--transition-fast);
    color: var(--cyan);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

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

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 30px 24px;
    color: var(--slate-blue);
    line-height: 1.7;
}

/* ===================================
   Registration Section
   =================================== */
.register {
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.register::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.register-wrapper {
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.register-info {
    color: var(--white);
}

.register-info .section-tag {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.register-info h2 {
    font-family: var(--font-display);
    font-size: 40px;
    margin-bottom: 20px;
}

.register-info > p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.register-perks {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.perk {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
}

.perk i {
    color: var(--cyan);
    font-size: 18px;
}

.register-form-container {
    background: var(--white);
    padding: 50px;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
}

.register-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 500;
    color: var(--deep-blue);
    font-size: 14px;
}

.form-group input,
.form-group select {
    padding: 14px 18px;
    border: 2px solid var(--light-periwinkle);
    border-radius: 12px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--cyan);
    box-shadow: 0 0 0 4px rgba(0, 163, 255, 0.1);
}

.checkbox-group {
    flex-direction: row;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 14px;
    color: var(--slate-blue);
}

.checkbox-label input {
    display: none;
}

.checkmark {
    width: 22px;
    height: 22px;
    border: 2px solid var(--light-periwinkle);
    border-radius: 6px;
    position: relative;
    transition: var(--transition-fast);
}

.checkbox-label input:checked + .checkmark {
    background: var(--cyan);
    border-color: var(--cyan);
}

.checkbox-label input:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 12px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label a {
    color: var(--cyan);
    text-decoration: underline;
}

.form-success {
    display: none;
    text-align: center;
    padding: 40px;
}

.form-success.active {
    display: block;
    animation: fadeInUp 0.5s ease;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.success-icon i {
    font-size: 40px;
    color: var(--white);
}

.form-success h3 {
    font-family: var(--font-display);
    font-size: 28px;
    color: var(--deep-blue);
    margin-bottom: 16px;
}

.form-success p {
    color: var(--slate-blue);
    margin-bottom: 24px;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--deep-blue);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 60px;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    flex: 1;
    max-width: 500px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    font-size: 15px;
}

.footer-nav {
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: flex-end;
}

.footer-links {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--cyan);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--cyan);
}

.footer-links a:hover::after {
    width: 100%;
}

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

.social-links a {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--cyan);
    transform: translateY(-3px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-newsletter h4 {
    font-family: var(--font-display);
    font-size: 18px;
    margin-bottom: 16px;
}

.footer-newsletter p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
    font-size: 14px;
}

.newsletter-form {
    display: flex;
    gap: 10px;
}

.newsletter-form input {
    flex: 1;
    padding: 14px 18px;
    border: none;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 14px;
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-form button {
    width: 50px;
    height: 50px;
    background: var(--cyan);
    border-radius: 12px;
    color: var(--white);
    font-size: 18px;
    transition: var(--transition-fast);
}

.newsletter-form button:hover {
    background: var(--lavender);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom i {
    color: var(--cyan);
    margin: 0 4px;
}

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-medium);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* ===================================
   Responsive Styles
   =================================== */
@media (max-width: 1024px) {
    .prizes-grid {
        grid-template-columns: 1fr;
    }
    
    .prize-card.grand {
        transform: scale(1);
    }
    
    .prize-card.grand:hover {
        transform: translateY(-10px);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-brand {
        grid-column: span 2;
    }
    
    .register-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 30px;
        transition: var(--transition-medium);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-link {
        color: var(--slate-blue);
        font-size: 18px;
    }
    
    .nav-link.btn-register {
        background: var(--gradient-primary);
        color: var(--white);
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 30px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .countdown {
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .countdown-item {
        min-width: 80px;
        padding: 15px 20px;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column;
        gap: 15px;
        padding-left: 50px;
    }
    
    .timeline-item::before {
        left: 15px;
        top: 0;
    }
    
    .timeline-time {
        padding-top: 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .register-form-container {
        padding: 30px;
    }
    
    .register-perks {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-brand {
        max-width: 100%;
    }
    
    .footer-nav {
        align-items: flex-start;
        width: 100%;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .about-card,
    .track-card,
    .prize-card {
        padding: 30px 20px;
    }
    
    .schedule-tabs {
        gap: 10px;
    }
    
    .tab-btn {
        padding: 15px 25px;
    }
    
    .faq-question {
        padding: 20px;
        font-size: 16px;
    }
    
    .faq-answer p {
        padding: 0 20px 20px;
    }
}