/**
 * LVL Gaming Universe - Main Stylesheet
 * Cyberpunk/Neon aesthetic
 */

/* =====================================================
   CSS Variables
   ===================================================== */
:root {
    /* Colors */
    --bg-dark: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --primary: #00d9ff;
    --primary-glow: rgba(0, 217, 255, 0.3);
    --secondary: #00ff88;
    --accent: #ff0055;
    --accent-glow: rgba(255, 0, 85, 0.3);
    --warning: #ffaa00;
    --text: #ffffff;
    --text-muted: #8888aa;
    --border: #2a2a3a;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

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

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;

    /* Font */
    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'Consolas', 'Monaco', monospace;
}

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

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

body {
    font-family: var(--font-main);
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a:hover {
    color: var(--secondary);
}

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

/* =====================================================
   Typography
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

/* =====================================================
   Navigation
   ===================================================== */
.main-nav {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

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

.logo-icon {
    font-size: 1.75rem;
}

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

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-muted);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
}

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

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

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

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

/* User Menu */
.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xs) var(--spacing-md) var(--spacing-xs) var(--spacing-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text);
}

.user-menu-btn:hover {
    border-color: var(--primary);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--bg-dark);
}

.user-name {
    font-weight: 500;
}

.user-points {
    color: var(--secondary);
    font-size: 0.75rem;
    font-weight: 600;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.user-menu.open .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text);
    transition: background var(--transition-fast);
}

.user-dropdown a:hover {
    background: var(--bg-card-hover);
    color: var(--primary);
}

/* =====================================================
   Buttons
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background: var(--secondary);
    box-shadow: 0 0 20px var(--primary-glow);
}

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

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

.btn-accent {
    background: var(--accent);
    color: var(--text);
}

.btn-accent:hover {
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-block {
    width: 100%;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

/* =====================================================
   Main Content
   ===================================================== */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    width: 100%;
}

/* =====================================================
   Game Cards Grid
   ===================================================== */
.page-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.page-header p {
    color: var(--text-muted);
    font-size: 1.125rem;
    margin-top: var(--spacing-sm);
}

.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.game-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.game-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 217, 255, 0.15);
}

.game-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.game-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.game-card p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
    flex: 1;
}

.game-stats {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--border);
    margin-bottom: var(--spacing-md);
    font-size: 0.75rem;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    display: block;
}

.stat-label {
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* =====================================================
   Modal
   ===================================================== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 100%;
    position: relative;
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.modal.show .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1;
}

.modal-close:hover {
    color: var(--accent);
}

/* =====================================================
   Forms
   ===================================================== */
.auth-form h2 {
    text-align: center;
    margin-bottom: var(--spacing-xs);
}

.auth-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: 0.875rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.75rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.form-error {
    color: var(--accent);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.auth-switch {
    text-align: center;
    margin-top: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* =====================================================
   Leaderboard
   ===================================================== */
.leaderboard-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    font-weight: 500;
}

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

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

.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
}

.leaderboard-table th,
.leaderboard-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.leaderboard-table th {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.leaderboard-table tr:hover td {
    background: var(--bg-card-hover);
}

.rank-cell {
    font-weight: 700;
    font-size: 1.125rem;
}

.rank-1 { color: #ffd700; }
.rank-2 { color: #c0c0c0; }
.rank-3 { color: #cd7f32; }

.player-cell {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.player-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--bg-dark);
}

.score-cell {
    font-weight: 700;
    color: var(--secondary);
    font-family: var(--font-mono);
}

/* =====================================================
   Game Container (Shared)
   ===================================================== */
.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 500px;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.game-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.game-title h2 {
    margin: 0;
    font-size: 1.25rem;
}

.game-info {
    display: flex;
    gap: var(--spacing-xl);
}

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

.game-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.game-stat-label {
    font-size: 0.625rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.score-value { color: var(--primary); }
.level-value { color: var(--warning); }
.highscore-value { color: var(--secondary); }

.game-canvas-wrapper {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: 0 0 30px rgba(0, 217, 255, 0.1);
}

.game-canvas {
    display: block;
    background: #0a0a12;
    border-radius: var(--radius-sm);
}

.game-controls {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.game-controls kbd {
    display: inline-block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    margin: 0 2px;
}

/* Mobile Controls */
.mobile-controls {
    display: none;
    gap: var(--spacing-sm);
}

.mobile-controls .btn {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
    padding: 0;
    border-radius: var(--radius-lg);
}

.dpad {
    display: grid;
    grid-template-columns: repeat(3, 60px);
    gap: var(--spacing-xs);
}

.dpad-spacer {
    visibility: hidden;
}

/* Game Over Overlay */
.game-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.game-overlay.show {
    opacity: 1;
    visibility: visible;
}

.game-over-content {
    text-align: center;
    background: var(--bg-card);
    border: 2px solid var(--accent);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    max-width: 400px;
    box-shadow: 0 0 60px var(--accent-glow);
}

.game-over-content h2 {
    color: var(--accent);
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
}

.final-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

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

.final-stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    display: block;
}

.final-stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

.new-high-score {
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.achievement-popup {
    background: var(--bg-dark);
    border: 1px solid var(--warning);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.achievement-icon {
    font-size: 2rem;
}

.achievement-info {
    text-align: left;
}

.achievement-name {
    font-weight: 600;
    color: var(--warning);
}

.achievement-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.game-over-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* =====================================================
   Footer
   ===================================================== */
.main-footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 768px) {
    .nav-container {
        flex-wrap: wrap;
    }

    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        padding-top: var(--spacing-md);
        border-top: 1px solid var(--border);
        margin-top: var(--spacing-md);
    }

    .game-controls {
        display: none;
    }

    .mobile-controls {
        display: flex;
    }

    h1 {
        font-size: 1.75rem;
    }

    .games-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav-user .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.75rem;
    }

    .user-name {
        display: none;
    }

    .game-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .final-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}