/* ========================================
   NeverMile Technology Hackathon 2025
   Vibrant Tech Theme - Dark Mode
   ======================================== */

/* ========================================
   1. CSS Variables
   ======================================== */
:root {
    /* Vietnamese-inspired color palette */
    --primary-red: #DA251D;
    --primary-gold: #FFCD00;

    /* Background - Dark */
    --bg-dark: #0F1419;
    --bg-darker: #0A0E13;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);

    /* Text */
    --text-primary: #FFFFFF;
    --text-secondary: #8B96A5;
    --text-muted: #6B7280;

    /* Accent */
    --accent-blue: #4A9EFF;
    --accent-purple: #9D4EDD;
    --success-green: #06D6A0;

    /* Border */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 205, 0, 0.3);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-red), var(--primary-gold));
    --gradient-secondary: linear-gradient(135deg, var(--primary-gold), var(--primary-red));
    --gradient-gold: linear-gradient(135deg, #FFD700, #FFA500);

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Christmas Colors */
    --christmas-red: #C41E3A;
    --christmas-green: #228B22;
}

/* ========================================
   Christmas Snow Effect
   ======================================== */
.snowflakes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

.snowflake {
    position: absolute;
    top: -10px;
    color: #fff;
    font-size: 1rem;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
    animation: snowfall linear infinite;
    opacity: 0.8;
}

.snowflake:nth-child(1) { left: 5%; animation-duration: 10s; animation-delay: 0s; font-size: 0.8rem; }
.snowflake:nth-child(2) { left: 15%; animation-duration: 12s; animation-delay: 1s; font-size: 1.2rem; }
.snowflake:nth-child(3) { left: 25%; animation-duration: 8s; animation-delay: 2s; font-size: 0.6rem; }
.snowflake:nth-child(4) { left: 35%; animation-duration: 14s; animation-delay: 0.5s; font-size: 1rem; }
.snowflake:nth-child(5) { left: 45%; animation-duration: 11s; animation-delay: 3s; font-size: 0.9rem; }
.snowflake:nth-child(6) { left: 55%; animation-duration: 9s; animation-delay: 1.5s; font-size: 1.1rem; }
.snowflake:nth-child(7) { left: 65%; animation-duration: 13s; animation-delay: 2.5s; font-size: 0.7rem; }
.snowflake:nth-child(8) { left: 75%; animation-duration: 10s; animation-delay: 4s; font-size: 1rem; }
.snowflake:nth-child(9) { left: 85%; animation-duration: 15s; animation-delay: 0s; font-size: 0.8rem; }
.snowflake:nth-child(10) { left: 95%; animation-duration: 11s; animation-delay: 2s; font-size: 1.3rem; }
.snowflake:nth-child(11) { left: 10%; animation-duration: 9s; animation-delay: 3.5s; font-size: 0.5rem; }
.snowflake:nth-child(12) { left: 20%; animation-duration: 12s; animation-delay: 1s; font-size: 1rem; }
.snowflake:nth-child(13) { left: 30%; animation-duration: 10s; animation-delay: 4.5s; font-size: 0.9rem; }
.snowflake:nth-child(14) { left: 40%; animation-duration: 14s; animation-delay: 2s; font-size: 0.7rem; }
.snowflake:nth-child(15) { left: 50%; animation-duration: 8s; animation-delay: 0s; font-size: 1.2rem; }
.snowflake:nth-child(16) { left: 60%; animation-duration: 11s; animation-delay: 3s; font-size: 0.6rem; }
.snowflake:nth-child(17) { left: 70%; animation-duration: 13s; animation-delay: 1.5s; font-size: 1.1rem; }
.snowflake:nth-child(18) { left: 80%; animation-duration: 9s; animation-delay: 4s; font-size: 0.8rem; }
.snowflake:nth-child(19) { left: 90%; animation-duration: 12s; animation-delay: 2.5s; font-size: 1rem; }
.snowflake:nth-child(20) { left: 3%; animation-duration: 10s; animation-delay: 0.5s; font-size: 0.9rem; }

@keyframes snowfall {
    0% {
        transform: translateY(-10px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.8;
    }
    90% {
        opacity: 0.8;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Christmas Decorations */
.christmas-decorations {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.christmas-tree {
    position: fixed;
    bottom: 20px;
    left: 20px;
    font-size: 3.5rem;
    opacity: 0.75;
    animation: gentle-sway 4s ease-in-out infinite;
}

.snowman {
    position: fixed;
    bottom: 20px;
    right: 20px;
    font-size: 3rem;
    opacity: 0.75;
    animation: gentle-bounce 3s ease-in-out infinite;
}

.santa-sleigh {
    position: fixed;
    font-size: 1.8rem;
    opacity: 0.25;
}

/* Xe trượt tuyết - bay dọc từ trên xuống (tránh vùng giữa) */
.sleigh-1 {
    left: 5%;
    top: -60px;
    font-size: 2rem;
    opacity: 0.7;
    animation: sleigh-fall 18s linear infinite;
}

.sleigh-2 {
    left: 12%;
    top: -60px;
    font-size: 1.5rem;
    opacity: 0.5;
    animation: sleigh-fall 22s linear infinite;
    animation-delay: 3s;
}

.sleigh-3 {
    left: 20%;
    top: -60px;
    font-size: 1.8rem;
    opacity: 0.6;
    animation: sleigh-fall 20s linear infinite;
    animation-delay: 8s;
}

.sleigh-4 {
    right: 5%;
    left: auto;
    top: -60px;
    font-size: 1.4rem;
    opacity: 0.45;
    animation: sleigh-fall 25s linear infinite;
    animation-delay: 12s;
}

.sleigh-5 {
    right: 12%;
    left: auto;
    top: -60px;
    font-size: 1.6rem;
    opacity: 0.55;
    animation: sleigh-fall 19s linear infinite;
    animation-delay: 6s;
}

.sleigh-6 {
    right: 20%;
    left: auto;
    top: -60px;
    font-size: 1.3rem;
    opacity: 0.4;
    animation: sleigh-fall 28s linear infinite;
    animation-delay: 15s;
}

.sleigh-7 {
    left: 8%;
    top: -60px;
    font-size: 1.2rem;
    opacity: 0.4;
    animation: sleigh-fall 24s linear infinite;
    animation-delay: 20s;
}

/* Ông già Noel - bay dọc từ trên xuống (tránh vùng giữa) */
.santa {
    position: fixed;
    font-size: 1.5rem;
    opacity: 0.5;
}

.santa-1 {
    left: 3%;
    top: -50px;
    font-size: 1.7rem;
    opacity: 0.7;
    animation: santa-fall 20s linear infinite;
    animation-delay: 5s;
}

.santa-2 {
    left: 15%;
    top: -50px;
    font-size: 1.3rem;
    opacity: 0.5;
    animation: santa-fall 26s linear infinite;
    animation-delay: 10s;
}

.santa-3 {
    left: 22%;
    top: -50px;
    font-size: 1.5rem;
    opacity: 0.6;
    animation: santa-fall 17s linear infinite;
    animation-delay: 2s;
}

.santa-4 {
    right: 3%;
    left: auto;
    top: -50px;
    font-size: 1.2rem;
    opacity: 0.45;
    animation: santa-fall 23s linear infinite;
    animation-delay: 14s;
}

.santa-5 {
    right: 15%;
    left: auto;
    top: -50px;
    font-size: 1.4rem;
    opacity: 0.55;
    animation: santa-fall 21s linear infinite;
    animation-delay: 9s;
}

.santa-6 {
    right: 22%;
    left: auto;
    top: -50px;
    font-size: 1.1rem;
    opacity: 0.4;
    animation: santa-fall 29s linear infinite;
    animation-delay: 17s;
}

.santa-7 {
    left: 10%;
    top: -50px;
    font-size: 1rem;
    opacity: 0.4;
    animation: santa-fall 24s linear infinite;
    animation-delay: 7s;
}

@keyframes sleigh-fall {
    0% {
        top: -60px;
        opacity: 0;
    }
    5% {
        opacity: 0.6;
    }
    95% {
        opacity: 0.6;
    }
    100% {
        top: 105vh;
        opacity: 0;
    }
}

@keyframes santa-fall {
    0% {
        top: -50px;
        opacity: 0;
    }
    5% {
        opacity: 0.6;
    }
    95% {
        opacity: 0.6;
    }
    100% {
        top: 105vh;
        opacity: 0;
    }
}

.gift {
    position: fixed;
    font-size: 1.8rem;
    opacity: 0.6;
    animation: gift-shake 2s ease-in-out infinite;
}

.gift-1 {
    bottom: 25px;
    left: 85px;
}

.gift-2 {
    bottom: 30px;
    right: 80px;
    animation-delay: 0.5s;
}

.christmas-star {
    position: fixed;
    font-size: 1.2rem;
    opacity: 0.6;
    animation: star-twinkle 2s ease-in-out infinite;
}

.star-1 {
    top: 120px;
    left: 50px;
}

.star-2 {
    top: 200px;
    right: 60px;
    font-size: 1rem;
    animation-delay: 0.7s;
}

.star-3 {
    top: 300px;
    left: 80px;
    font-size: 0.9rem;
    animation-delay: 1.4s;
}

.candy-cane {
    position: fixed;
    bottom: 80px;
    left: 30px;
    font-size: 1.5rem;
    opacity: 0.55;
    animation: gentle-sway 3s ease-in-out infinite;
}

.bell {
    position: fixed;
    top: 180px;
    right: 40px;
    font-size: 1.3rem;
    opacity: 0.55;
    animation: bell-ring 1.5s ease-in-out infinite;
}

.holly {
    position: fixed;
    bottom: 100px;
    right: 35px;
    font-size: 1.5rem;
    opacity: 0.55;
    animation: gentle-sway 3.5s ease-in-out infinite;
    animation-delay: 0.5s;
}

@keyframes gentle-sway {
    0%, 100% { transform: rotate(-3deg); }
    50% { transform: rotate(3deg); }
}

@keyframes gentle-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}


@keyframes gift-shake {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-5deg); }
    75% { transform: rotate(5deg); }
}

@keyframes star-twinkle {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 0.9; transform: scale(1.2); }
}

@keyframes bell-ring {
    0%, 100% { transform: rotate(0deg); }
    20% { transform: rotate(15deg); }
    40% { transform: rotate(-15deg); }
    60% { transform: rotate(10deg); }
    80% { transform: rotate(-10deg); }
}

/* Hide some decorations on mobile for cleaner look */
@media (max-width: 768px) {
    .christmas-tree { font-size: 2.5rem; opacity: 0.4; }
    .snowman { font-size: 2.2rem; opacity: 0.4; }
    .gift { font-size: 1.3rem; opacity: 0.3; }
    .christmas-star { font-size: 1rem; }
    .santa-sleigh { font-size: 1.8rem; }
    .santa { font-size: 1.5rem; }
    .candy-cane { display: none; }
    .bell { display: none; }
    .holly { display: none; }
    .star-3 { display: none; }
}

/* ========================================
   2. CSS Reset
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
    list-style: none;
}

/* ========================================
   3. Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
    color: var(--text-secondary);
}

/* ========================================
   4. Layout
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-24) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-title {
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   5. Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 205, 0, 0.3);
}

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

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

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1.125rem;
}

/* ========================================
   6. Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-4) 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 10, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.25rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.5rem;
}

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

.nav-menu {
    display: flex;
    gap: var(--space-8);
}

.nav-link {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-gold);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: var(--space-1);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--space-1);
}

.lang-btn {
    padding: var(--space-2) var(--space-3);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    color: var(--text-primary);
}

.lang-btn.active {
    background: var(--gradient-primary);
    color: var(--bg-dark);
}

.nav-cta {
    padding: var(--space-2) var(--space-4);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   7. Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-24) 0;
    background: var(--bg-darker);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(218, 37, 29, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(255, 205, 0, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: left;
    max-width: 800px;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, rgba(218, 37, 29, 0.3), rgba(255, 205, 0, 0.3));
    border: none;
    border-radius: 50px;
    font-size: 0.875rem;
}

.hero-badge span {
    color: var(--text-primary);
}

.hero-badge-tech {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.3), rgba(74, 158, 255, 0.3));
}

.hero-badge-tech span {
    color: var(--text-primary);
}

.hero-title {
    margin-bottom: var(--space-6);
}

.title-gradient {
    display: block;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.15;
}

.title-nevermile {
    background: linear-gradient(90deg, var(--primary-red) 0%, #FF6B35 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-technology {
    background: linear-gradient(90deg, #FF6B35 0%, var(--primary-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-main {
    display: block;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-top: var(--space-1);
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.hero-description {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    max-width: 700px;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-primary);
    font-size: 0.95rem;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

/* Countdown */
.countdown-wrapper {
    text-align: center;
    margin-top: var(--space-16);
}

.countdown-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-6);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.countdown {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 80px;
}

.countdown-number {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.countdown-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: var(--space-2);
}

.countdown-separator {
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--text-muted);
    line-height: 1;
}

/* ========================================
   8. Overview Section
   ======================================== */
.overview {
    background: var(--bg-dark);
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-6);
}

.overview-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    transition: all var(--transition-normal);
}

.overview-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-3);
}

.card-desc {
    font-size: 0.9rem;
    line-height: 1.7;
}

.card-list {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.card-list li {
    position: relative;
    padding-left: 1.25rem;
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.card-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-gold);
    font-weight: bold;
}

/* ========================================
   9. Challenge Section
   ======================================== */
.challenge {
    background: var(--bg-darker);
}

.challenge-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.challenge-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: all var(--transition-normal);
}

.challenge-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.challenge-item-title {
    font-size: 1.25rem;
    color: var(--primary-gold);
    margin-bottom: var(--space-3);
}

.challenge-item-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.challenge-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.challenge-list li {
    position: relative;
    padding-left: 1.25rem;
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.challenge-list li:last-child {
    margin-bottom: 0;
}

.challenge-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-gold);
    font-weight: bold;
}

/* ========================================
   10. Schedule Section
   ======================================== */
.schedule {
    background: var(--bg-dark);
}

.schedule-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.schedule-day {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
}

.day-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-color);
}

.day-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.day-info h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-1);
}

.day-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.timeline-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.timeline-item:hover {
    background: var(--bg-card-hover);
}

.timeline-item .time {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-gold);
    min-width: 60px;
}

.timeline-item .event {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.timeline-item.highlight {
    background: rgba(255, 205, 0, 0.1);
    border-left: 3px solid var(--primary-gold);
}

.timeline-item.highlight .event {
    color: var(--text-primary);
    font-weight: 500;
}

/* ========================================
   11. Prizes Section
   ======================================== */
.prizes {
    background: var(--bg-darker);
}

.prize-showcase {
    margin-bottom: var(--space-16);
}

.prize-main {
    text-align: center;
    padding: var(--space-12);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.prize-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-gold);
}

.prize-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: var(--space-4);
}

.prize-amount {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.prize-amount .currency {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-gold);
}

.prize-amount .amount {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.prize-label {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

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

.criteria-section {
    text-align: center;
}

.criteria-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-8);
}

.criteria-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

.criteria-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: left;
    transition: all var(--transition-normal);
}

.criteria-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.criteria-percent {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-3);
    text-align: center;
}

.criteria-card h4 {
    font-size: 1rem;
    margin-bottom: var(--space-2);
    text-align: center;
    min-height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.criteria-card p {
    font-size: 0.85rem;
}

.criteria-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.criteria-list li {
    position: relative;
    padding-left: 1.25rem;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.criteria-list li:last-child {
    margin-bottom: 0;
}

.criteria-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-gold);
    font-weight: bold;
}

.criteria-threshold {
    margin-top: var(--space-6);
    padding: var(--space-4) var(--space-5);
    background: rgba(255, 205, 0, 0.08);
    border: 1px solid rgba(255, 205, 0, 0.3);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 500;
    color: var(--primary-gold);
    font-size: 0.9rem;
}

/* ========================================
   12. Rules Section
   ======================================== */
.rules {
    background: var(--bg-dark);
}

.rules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.rule-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.rule-item:hover {
    border-color: var(--border-hover);
}

.rule-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.rule-content h4 {
    margin-bottom: var(--space-2);
}

.rule-content p {
    font-size: 0.9rem;
}

/* ========================================
   12b. Legal Section
   ======================================== */
.legal {
    background: var(--bg-darker);
}

.legal-summary {
    max-width: 1000px;
    margin: 0 auto;
}

.legal-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

@media (max-width: 768px) {
    .legal-grid {
        grid-template-columns: 1fr;
    }
}

.legal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: all var(--transition-normal);
}

.legal-card:hover {
    border-color: var(--border-hover);
}

.legal-card h4 {
    font-size: 1.1rem;
    color: var(--primary-gold);
    margin-bottom: var(--space-3);
}

.legal-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.legal-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: var(--space-4);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

/* ========================================
   13. FAQ Section
   ======================================== */
.faq {
    background: var(--bg-darker);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

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

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    transition: color var(--transition-fast);
}

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

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-gold);
    transition: transform var(--transition-normal);
}

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

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

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

.faq-answer p {
    padding: 0 var(--space-6) var(--space-6);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========================================
   14. Registration Section
   ======================================== */
.register {
    background: var(--bg-dark);
    padding: var(--space-16) 0;
}

.register-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-12);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.register-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.register-content h2 {
    font-size: 2rem;
    margin-bottom: var(--space-4);
}

.register-content p {
    font-size: 1.125rem;
    margin-bottom: var(--space-6);
}

.register-note {
    margin-top: var(--space-4);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ========================================
   15. Footer
   ======================================== */
.footer {
    background: var(--bg-darker);
    padding: var(--space-12) 0 var(--space-8);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.footer-info p {
    font-size: 0.9rem;
}

.footer-contact h4 {
    margin-bottom: var(--space-4);
    color: var(--primary-gold);
}

.footer-contact p {
    font-size: 0.9rem;
    margin-bottom: var(--space-2);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ========================================
   16. Responsive Design
   ======================================== */

/* Tablet */
@media (max-width: 992px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 10, 26, 0.98);
        padding: var(--space-6);
        border-bottom: 1px solid var(--border-color);
        gap: var(--space-4);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-cta {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero-container {
        text-align: center;
    }

    .countdown {
        gap: var(--space-2);
    }

    .countdown-item {
        min-width: 60px;
    }
}

/* Mobile */
@media (max-width: 640px) {
    .section {
        padding: var(--space-16) 0;
    }

    .container {
        padding: 0 var(--space-4);
    }

    .hero {
        padding-top: calc(80px + var(--space-8));
    }

    .hero-badge {
        flex-direction: column;
        gap: var(--space-1);
    }

    .badge-divider {
        display: none;
    }

    .hero-meta {
        flex-direction: column;
        gap: var(--space-3);
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .countdown-separator {
        font-size: 1.5rem;
    }

    .lang-switcher {
        display: none;
    }

    .nav-menu .lang-mobile {
        display: flex;
        gap: var(--space-2);
        padding-top: var(--space-4);
        border-top: 1px solid var(--border-color);
    }

    .schedule-day {
        padding: var(--space-6);
    }

    .prize-main {
        padding: var(--space-8);
    }

    .register-card {
        padding: var(--space-8);
    }
}

/* Small Mobile */
@media (max-width: 380px) {
    .countdown-item {
        min-width: 50px;
    }

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

    .prize-amount .amount {
        font-size: 2.5rem;
    }
}