/* ===== CSS VARIABLES ===== */
:root {
    /* Colors - Black & Blue Theme */
    --black: #000000;
    --black-dark: #0a0a0a;
    --black-light: #1a1a1a;
    --blue: #0066FF;
    --blue-dark: #0044CC;
    --blue-light: #3385FF;
    --blue-accent: #00CCFF;
    --blue-neon: #00FFFF;
    --white: #FFFFFF;
    --gray-50: #f8f9fa;
    --gray-100: #e9ecef;
    --gray-200: #dee2e6;
    --gray-300: #ced4da;
    --gray-400: #adb5bd;
    --gray-500: #6c757d;
    --gray-600: #495057;
    --gray-700: #343a40;
    --gray-800: #212529;
    --gray-900: #111111;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--blue), var(--blue-accent));
    --gradient-secondary: linear-gradient(135deg, var(--blue-dark), var(--blue));
    --gradient-dark: linear-gradient(135deg, var(--black), var(--black-light));
    --gradient-hero: linear-gradient(135deg, var(--blue), var(--blue-neon));
    --gradient-metallic: linear-gradient(135deg, var(--blue), var(--blue-accent));
    --gradient-glow: linear-gradient(135deg, var(--blue-accent), var(--blue-neon));
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-blue: 0 0 20px rgba(0, 102, 255, 0.3);
    --shadow-neon: 0 0 30px rgba(0, 255, 255, 0.4);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-Index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
    --z-loading: 1070;
}

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

main {
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

/* Global width fix */
#root, .app, .website {
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    max-width: 100vw;
    width: 100%;
    min-height: 100vh;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--white);
    background: var(--black);
    overflow-x: hidden;
    max-width: 100vw;
    width: 100%;
    min-height: 100vh;
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: all var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    transform: scale(0.95);
}

.loading-content {
    text-align: center;
    color: var(--white);
    animation: fadeInUp 0.8s ease-out;
}

.loading-logo {
    width: 120px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: logoPulse 2s ease-in-out infinite;
}

.loading-logo img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.loading-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGlow 2s ease-in-out infinite;
}

.loading-subtitle {
    font-size: 1rem;
    color: var(--gray-300);
    margin-top: var(--spacing-lg);
    opacity: 0.8;
    animation: subtitleFade 2s ease-in-out infinite;
}

.loading-bar {
    width: 250px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    margin: var(--spacing-lg) auto 0;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.loading-progress {
    width: 0%;
    height: 100%;
    background: var(--gradient-metallic);
    border-radius: var(--radius-full);
    animation: loading-progress 3s ease-in-out;
    box-shadow: var(--shadow-blue);
}

@keyframes loading-progress {
    0% { width: 0%; }
    100% { width: 100%; }
}

@keyframes logoPulse {
    0%, 100% { 
        transform: scale(1); 
    }
    50% { 
        transform: scale(1.05); 
    }
}

@keyframes titleGlow {
    0%, 100% { 
        filter: brightness(1);
        transform: scale(1);
    }
    50% { 
        filter: brightness(1.1);
        transform: scale(1.02);
    }
}

@keyframes subtitleFade {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 102, 255, 0.2);
    z-index: var(--z-fixed);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.98);
    border-bottom-color: var(--blue);
    box-shadow: var(--shadow-blue);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.nav-logo img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--gray-300);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-normal);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--blue);
    transition: width var(--transition-normal);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--white);
    transition: all var(--transition-normal);
}

.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(7px, -6px);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-top: 70px;
    overflow-x: hidden;
    max-width: 100vw;
    width: 100%;
}

/* ===== HERO SECTION ===== */
.hero-section {
    min-height: 100vh;
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4xl) 0;
    width: 100%;
    max-width: 100vw;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 102, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 204, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text {
    color: var(--white);
}

.hero-logo {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.hero-logo img {
    width: 200px;
    height: auto;
    object-fit: contain;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
}

.title-line {
    display: block;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--gray-300);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--blue);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-normal);
}

.btn:hover::before {
    left: 100%;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-neon);
}

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

.btn-secondary:hover {
    background: var(--blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-outline {
    background: var(--white);
    color: var(--black);
    border: 2px solid var(--blue);
    box-shadow: var(--shadow-md);
}

.btn-outline:hover {
    background: var(--blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.brain-interface {
    position: relative;
    width: 300px;
    height: 300px;
}

.brain-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: var(--gradient-metallic);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--white);
    box-shadow: var(--shadow-neon);
    animation: brainPulse 3s ease-in-out infinite;
}

.brain-waves {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.wave {
    position: absolute;
    border: 2px solid var(--blue);
    border-radius: 50%;
    animation: waveExpand 4s ease-in-out infinite;
}

.wave-1 {
    width: 200px;
    height: 200px;
    animation-delay: 0s;
}

.wave-2 {
    width: 250px;
    height: 250px;
    animation-delay: 1s;
}

.wave-3 {
    width: 300px;
    height: 300px;
    animation-delay: 2s;
}

.connection-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.line {
    position: absolute;
    background: var(--blue);
    animation: lineFlow 2s ease-in-out infinite;
}

.line:nth-child(1) {
    top: 20%;
    left: 20%;
    width: 60px;
    height: 2px;
    animation-delay: 0s;
}

.line:nth-child(2) {
    top: 60%;
    right: 20%;
    width: 2px;
    height: 60px;
    animation-delay: 0.5s;
}

.line:nth-child(3) {
    bottom: 20%;
    left: 40%;
    width: 80px;
    height: 2px;
    animation-delay: 1s;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.floating-element {
    position: absolute;
    color: var(--blue);
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}

.floating-element:nth-child(1) {
    top: 20%;
    left: 10%;
    font-size: 2rem;
    animation-delay: 0s;
}

.floating-element:nth-child(2) {
    top: 60%;
    right: 15%;
    font-size: 1.5rem;
    animation-delay: 2s;
}

.floating-element:nth-child(3) {
    top: 80%;
    left: 20%;
    font-size: 1.8rem;
    animation-delay: 4s;
}

.floating-element:nth-child(4) {
    top: 30%;
    right: 25%;
    font-size: 2.2rem;
    animation-delay: 1s;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    color: var(--white);
    text-align: center;
    z-index: 2;
    opacity: 0.8;
}

.scroll-arrow {
    width: 3px;
    height: 25px;
    background: var(--white);
    margin: 0 auto var(--spacing-sm);
    position: relative;
    animation: scroll-bounce 2s infinite;
    border-radius: var(--radius-sm);
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: -3px;
    width: 9px;
    height: 9px;
    border-right: 2px solid var(--white);
    border-bottom: 2px solid var(--white);
    border-radius: 0;
    transform: rotate(45deg);
}

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

@keyframes brainPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.1); }
}

@keyframes waveExpand {
    0% { transform: scale(0.8); opacity: 0.8; }
    50% { transform: scale(1.2); opacity: 0.4; }
    100% { transform: scale(0.8); opacity: 0.8; }
}

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

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(120deg); }
    66% { transform: translateY(10px) rotate(240deg); }
}

/* ===== SECTIONS ===== */
.section {
    padding: var(--spacing-3xl) 0;
    position: relative;
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

.section + .section {
    margin-top: var(--spacing-xl);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    width: 100%;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg) 0;
}

.section-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    color: var(--white);
    margin-bottom: var(--spacing-md);
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: var(--font-size-xl);
    color: var(--gray-300);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== ABOUT SECTION ===== */
.about-section {
    background: var(--black-light);
    padding: var(--spacing-2xl) 0;
    margin: var(--spacing-xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    width: 100%;
}

.about-card {
    background: var(--black);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-800);
    margin: var(--spacing-sm) 0;
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--blue);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-metallic);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: 2rem;
    color: var(--white);
    box-shadow: var(--shadow-blue);
}

.about-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.card-details {
    margin-top: var(--spacing-md);
}

.detail-main {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--blue);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.detail-sub {
    font-size: 1rem;
    font-weight: 500;
    color: var(--gray-300);
    line-height: 1.4;
}

.about-features {
    display: grid;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-lg);
}

.feature-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}



.feature-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
    flex-shrink: 0;
}

.feature-content h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.feature-content p {
    font-size: 1.125rem;
    color: var(--gray-300);
    line-height: 1.6;
}

/* ===== SPONSORS SECTION ===== */
.sponsors-section {
    background: var(--black-dark);
    padding: var(--spacing-2xl) 0;
    margin: var(--spacing-xl) 0;
}

.sponsors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    width: 100%;
}

.sponsor-card {
    background: var(--black);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    min-height: 320px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.sponsor-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    transition: all var(--transition-normal);
}

.sponsor-card.partner::before {
    background: var(--blue);
}

.sponsor-card.diamond::before {
    background: var(--blue-accent);
}

.sponsor-card.startup::before {
    background: var(--blue-light);
}

.sponsor-card:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--blue);
}

.sponsor-logos {
    margin: 0 auto var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

.logo-item {
    background: var(--black-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    max-width: 200px;
    max-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--gray-800);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.logo-item img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: all var(--transition-normal);
}

.sponsor-card:hover .logo-item {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Tier-specific logo-item styling */
.sponsor-card.partner .logo-item {
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.sponsor-card.diamond .logo-item {
    background: rgba(0, 102, 255, 0.1);
    border: 1px solid rgba(0, 102, 255, 0.3);
}

.sponsor-card.startup .logo-item {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.sponsor-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.sponsor-info p {
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.sponsor-tier {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sponsor-card.partner .sponsor-tier {
    background: var(--blue);
    color: var(--white);
    box-shadow: var(--shadow-blue);
}

.sponsor-card.diamond .sponsor-tier {
    background: var(--blue-accent);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 204, 255, 0.4);
}

.sponsor-card.startup .sponsor-tier {
    background: var(--blue-light);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(51, 133, 255, 0.4);
}

/* Logo link styling */
.logo-item a {
    display: block;
    width: 100%;
    height: 100%;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
}

.logo-item a:hover {
    transform: scale(1.05);
}

.logo-item a:focus {
    outline: 2px solid var(--blue);
    outline-offset: 2px;
}

/* Partner Tier Text Colors */
.sponsor-card.partner .sponsor-info h3 {
    color: var(--blue);
}

.sponsor-card.partner .sponsor-info p {
    color: var(--gray-300);
}

/* Diamond Tier Text Colors */
.sponsor-card.diamond .sponsor-info h3 {
    color: var(--blue-accent);
}

.sponsor-card.diamond .sponsor-info p {
    color: var(--gray-300);
}

/* Startup Tier Text Colors */
.sponsor-card.startup .sponsor-info h3 {
    color: var(--blue-light);
}

.sponsor-card.startup .sponsor-info p {
    color: var(--gray-300);
}

/* ===== TRACKS SECTION ===== */
.tracks-section {
    background: var(--black);
}

.tracks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    padding: var(--spacing-md) 0;
    margin-top: var(--spacing-lg);
    width: 100%;
}

.track-card {
    background: var(--black-light);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-800);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin: var(--spacing-sm) 0;
}

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

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

.track-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--blue);
}

.track-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.track-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-metallic);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
    flex-shrink: 0;
    box-shadow: var(--shadow-blue);
}

.track-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.track-card p {
    color: var(--gray-300);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.track-tags {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.tag {
    background: var(--gray-800);
    color: var(--gray-300);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
}

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

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg) 0;
}

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

.timeline-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding-left: var(--spacing-lg);
}



.timeline-time {
    background: var(--blue);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-weight: 600;
    text-align: center;
    box-shadow: var(--shadow-blue);
}

.timeline-content {
    background: var(--black);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-800);
}

.timeline-content h3 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    color: var(--gray-300);
}

/* ===== FAQ SECTION ===== */
.faq-section {
    background: var(--black);
}

/* Hidden FAQ items */
.hidden-faq {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-normal);
}

.hidden-faq.show {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* FAQ Toggle Button */
.faq-toggle {
    text-align: center;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    width: 100%;
}

.faq-toggle .btn {
    min-width: 200px;
    padding: var(--spacing-md) var(--spacing-xl);
    margin: 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
}

.faq-toggle .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    width: 100%;
}

.faq-item {
    background: var(--black-light);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--gray-800);
    overflow: hidden;
}

.faq-question {
    padding: var(--spacing-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--transition-normal);
}

.faq-question:hover {
    background: var(--gray-800);
}

.faq-question h3 {
    color: var(--white);
    margin: 0;
}

.faq-question i {
    color: var(--blue);
    transition: transform var(--transition-normal);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

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

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--gray-300);
    margin: 0;
}

/* ===== REGISTRATION SECTION ===== */
.register-section {
    background: var(--black-light);
}

.register-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.register-text h2 {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.register-text p {
    font-size: var(--font-size-lg);
    color: var(--gray-300);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.countdown {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.countdown-item {
    text-align: center;
    background: var(--black);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-800);
}

.countdown-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--blue);
    margin-bottom: var(--spacing-xs);
}

.countdown-label {
    font-size: var(--font-size-sm);
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.join-button-container {
    margin-top: var(--spacing-2xl);
    text-align: center;
}

.join-button-container .btn {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}



/* ===== FOOTER ===== */
.footer {
    background: var(--black-dark);
    border-top: 1px solid var(--gray-800);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.footer-logo i {
    color: var(--blue);
    font-size: 2rem;
}

.footer-section h3 {
    color: var(--white);
    margin-bottom: var(--spacing-lg);
    font-size: 1.25rem;
}

.footer-section p {
    color: var(--gray-300);
    line-height: 1.6;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--gray-300);
    text-decoration: none;
    transition: color var(--transition-normal);
}

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

.footer-links i {
    color: var(--blue);
    margin-right: var(--spacing-sm);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--black);
    color: var(--gray-300);
    border-radius: 50%;
    text-decoration: none;
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-800);
}

.social-link:hover {
    background: var(--blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-800);
    color: var(--gray-400);
}

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: var(--blue);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-fixed);
}

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

.back-to-top:hover {
    background: var(--blue-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
}

/* ===== NOTIFICATION ===== */
.notification {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--black);
    color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--blue);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.notification.show {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.notification-close {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0;
}

.notification-close:hover {
    color: var(--white);
}

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

[data-aos] {
    opacity: 0;
    transition: all 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.8);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}

/* ===== MOBILE RESPONSIVENESS ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-lg);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-normal);
        z-index: var(--z-fixed);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-logo img {
        height: 32px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-2xl);
    }
    
    .hero-title {
        font-size: var(--font-size-5xl);
        line-height: 1.2;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
        line-height: 1.5;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .loading-logo {
        width: 100px;
        height: 60px;
    }
    
    .hero-logo img {
        width: 150px;
    }
    
    .hero-actions {
        gap: var(--spacing-md);
        justify-content: center;
    }
    
    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .brain-interface {
        width: 250px;
        height: 250px;
    }
    
    .floating-elements,
    .scroll-indicator {
        display: none;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .section + .section {
        margin-top: var(--spacing-lg);
    }
    
    .section-header {
        margin-bottom: var(--spacing-xl);
        padding: var(--spacing-md) 0;
    }
    
    .section-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .container {
        padding: 0 var(--spacing-md);
        max-width: 100%;
    }
    
    .about-grid,
    .tracks-grid,
    .timeline,
    .faq-grid,
    .register-content {
        padding: var(--spacing-md) 0;
        margin-top: var(--spacing-md);
    }
    
    .sponsors-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        width: 100%;
        max-width: 100%;
    }
    
    .sponsor-card {
        padding: var(--spacing-lg);
        min-height: 280px;
    }
    
    .sponsor-logos {
        min-height: 100px;
        gap: var(--spacing-sm);
    }
    
    .logo-item {
        padding: var(--spacing-sm);
        max-width: 160px;
        max-height: 100px;
    }
    
    .logo-item img {
        max-width: 100%;
        max-height: 100%;
    }
    
    .register-content {
        max-width: 100%;
        padding: 0 var(--spacing-md);
    }
    
    .join-button-container {
        margin-top: var(--spacing-xl);
      
    }
    
    .join-button-container .btn {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--font-size-base);
        padding-bottom: 20px;
    }
    
    .countdown {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .timeline-item {
        grid-template-columns: auto 1fr;
        gap: var(--spacing-md);
        padding-left: var(--spacing-md);
    }
    
    .timeline-time {
        grid-column: 1;
        justify-self: start;
    }
    
    .timeline-content {
        grid-column: 2;
        text-align: left;
    }
    
    .timeline::before {
        left: 0;
    }
    
    .faq-toggle {
        margin-top: var(--spacing-xl);
        margin-bottom: var(--spacing-lg);
        padding: var(--spacing-md) 0;
    }
    
    .faq-toggle .btn {
        min-width: 180px;
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .feature-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .feature-item:nth-child(even) {
        direction: ltr;
    }
    
    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 45px;
        height: 45px;
    }
    
    .notification {
        top: var(--spacing-md);
        right: var(--spacing-md);
        left: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.5;
    }
    
    .section-title {
        font-size: 1.75rem;
        line-height: 1.2;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .about-card,
    .track-card {
        padding: var(--spacing-lg);
    }
    
    .detail-main {
        font-size: 1.1rem !important;
    }
    
    .detail-sub {
        font-size: 0.9rem;
    }
    
    .countdown {
        grid-template-columns: 1fr;
    }
    
    .form {
        padding: var(--spacing-lg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}