@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --primary: #6366f1;
    --primary-glow: rgba(99, 102, 241, 0.5);
    --secondary: #8b5cf6;
    --accent: #0ea5e9;
    --background: #0b0f1a;
    --surface: #151b2d;
    --surface-bright: #1f2943;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.08);
    --border-bright: rgba(255, 255, 255, 0.15);
    --glass: rgba(15, 23, 42, 0.7);
    --radius-sm: 8px;
    --radius: 16px;
    --radius-lg: 24px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--background);
    color: var(--text);
    font-family: 'Plus Jakarta Sans', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
    min-height: 100vh;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-bright);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Typography Overrides */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text);
    font-weight: 800;
    letter-spacing: -0.02em;
}

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

button,
input,
select,
textarea {
    font-family: inherit;
}

/* Container */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
}

/* Header & Glass Effect */
header {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 40px;
}

.web-title {
    font-size: 22px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.web-title img {
    height: 32px;
    width: auto;
    filter: drop-shadow(0 0 10px var(--primary-glow));
}

/* Navigation & Sidebar */
.main-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
    padding: 40px 0;
    min-height: calc(100vh - 80px);
}

@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
    }

    .navigation {
        display: none;
    }
}

.navigation {
    position: sticky;
    top: 120px;
    height: fit-content;
}

.nav-button a {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    border-radius: var(--radius);
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 8px;
    border: 1px solid transparent;
}

.nav-button:hover a {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}

.nav-button.active a {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow: 0 8px 20px var(--primary-glow);
}

/* User Stats & Interface */
.user-stats {
    display: flex;
    gap: 16px;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    padding: 8px 16px;
    border-radius: 99px;
    border: 1px solid var(--border);
    font-size: 13px;
    font-weight: 600;
    margin-right: auto;
    margin-left: 40px;
}

.user-stats span {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
}

.user-stats span i {
    color: var(--primary);
}

.enter-button a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    transition: var(--transition);
}

.enter-button a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.enter-button.signup a {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.enter-button.signup a:hover {
    background: var(--secondary);
    border-color: var(--secondary);
}

.mobile-nav {
    display: none;
}

@media (max-width: 1024px) {
    .user-stats {
        display: none;
    }

    .header-container {
        padding: 0 20px;
    }

    .enter-button {
        display: none;
    }

    .mobile-nav {
        display: block;
    }

    .burger {
        font-size: 24px;
        color: var(--text);
        cursor: pointer;
        padding: 8px;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 8px;
        border: 1px solid var(--border);
    }
}

/* Main Content Display */
.main-display {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.main-display::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 0;
    background: radial-gradient(circle at center, rgba(99, 102, 241, 0.1), transparent 70%);
}

.hero h1 {
    font-size: clamp(40px, 8vw, 72px);
    line-height: 1;
    margin-bottom: 24px;
    background: linear-gradient(to bottom, #fff 40%, #64748b);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 20px;
    color: var(--text-muted);
    max-width: 720px;
    margin: 0 auto 48px;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 80px;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 16px 36px;
    border-radius: 99px;
    font-weight: 700;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 10px 25px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-4px);
    background: var(--secondary);
    box-shadow: 0 15px 30px var(--primary-glow);
}

.btn-secondary {
    background: var(--surface-bright);
    color: var(--text);
    border: 1px solid var(--border-bright);
}

.btn-secondary:hover {
    background: var(--border-bright);
    transform: translateY(-4px);
}

/* Grid & Cards */
.theme-grid,
.features-grid,
.handbook-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.theme-card,
.feature-card,
.hb-card {
    background: var(--surface-bright);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.theme-card:hover,
.feature-card:hover,
.hb-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 20px var(--primary-glow);
}

.icon-wrap,
.feature-card i {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: #fff;
    font-size: 28px;
}

/* Form Styling (Modern) */
.i42-form {
    max-width: 480px;
    margin: 0 auto;
}

.form-action-title {
    font-size: 32px;
    margin-bottom: 40px;
    text-align: center;
}

.i42-form label {
    display: block;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 8px;
}

.i42-form input,
.i42-form select,
.i42-form textarea {
    width: 100%;
    background: rgba(11, 15, 26, 0.5);
    border: 1px solid var(--border-bright);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 16px;
    margin-bottom: 24px;
    transition: var(--transition);
}

.i42-form input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(11, 15, 26, 0.8);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.i42-form button {
    width: 100%;
    padding: 18px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 800;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
}

.i42-form button:hover {
    background: var(--secondary);
    transform: scale(0.98);
}

/* Leaderboard Table */
.leaderboard-container {
    width: 100%;
}

.leader-head {
    display: grid;
    grid-template-columns: 80px 1fr 100px 100px 100px;
    padding: 16px 24px;
    background: var(--surface-bright);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.1em;
}

.leader-body-item {
    display: grid;
    grid-template-columns: 80px 1fr 100px 100px 100px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    align-items: center;
}

.leader-body-item:hover {
    background: rgba(255, 255, 255, 0.03);
}

.leader-body-item.active {
    background: rgba(99, 102, 241, 0.1);
    border-left: 4px solid var(--primary);
}

/* Mobile Nav Overlay */
.mobile-nav .list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--surface);
    z-index: 2000;
    padding: 80px 24px 40px;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 1px solid var(--border);
    box-shadow: -20px 0 40px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
}

.mobile-nav .list.active {
    right: 0;
}

.mobile-nav nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-nav nav a {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
    border: 1px solid transparent;
}

.mobile-nav nav a:hover,
.mobile-nav nav a.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-color: var(--primary-glow);
    transform: translateX(-4px);
}

.close_btn {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
    font-size: 20px;
}

.close_btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    transform: rotate(90deg);
}

/* Utilities */
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.glass-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
}