/* Warp Racer Platform — Dark gaming theme */

:root {
    --bg-dark: #1a1a2e;
    --bg-darker: #0d0d1a;
    --bg-card: #232342;
    --bg-input: #2a2a4a;
    --accent: #53a8ff;
    --accent-hover: #3d8ce0;
    --accent-glow: rgba(83, 168, 255, 0.3);
    --green: #4ade80;
    --red: #f87171;
    --yellow: #fbbf24;
    --text: #e2e8f0;
    --text-dim: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* ---------- Header / Nav ---------- */

.site-header {
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.5px;
}
.site-logo span {
    color: var(--text);
    font-weight: 400;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-links a {
    color: var(--text-dim);
    font-size: 14px;
    padding: 6px 12px;
    border-radius: var(--radius);
    transition: color 0.15s, background 0.15s;
}
.nav-links a:hover {
    color: var(--text);
    background: var(--bg-card);
    text-decoration: none;
}

#nav-user {
    font-size: 14px;
    color: var(--text-dim);
}

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
}
.btn:hover {
    transform: translateY(-1px);
}
.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    background: var(--bg-input);
}

.btn-danger {
    background: var(--red);
    color: #fff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

/* ---------- Forms ---------- */

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-dim);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s;
}
.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-error {
    color: var(--red);
    font-size: 13px;
    margin-top: 8px;
}

/* ---------- Cards ---------- */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

/* ---------- Track Grid ---------- */

.track-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    padding: 24px;
}

.track-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0;
    overflow: hidden;
    transition: border-color 0.15s, transform 0.15s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}
.track-card-preview {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
    background: #1a1a2e;
}
.track-card-no-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 13px;
}
.track-card-title,
.track-card-meta,
.track-card-desc,
.track-card-stats {
    padding-left: 16px;
    padding-right: 16px;
}
.track-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.track-card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    padding-top: 12px;
}

.track-card-meta {
    font-size: 13px;
    color: var(--text-dim);
    display: flex;
    gap: 12px;
    margin-bottom: 8px;
}

.track-card-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.track-card-stats {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-dim);
    padding-bottom: 14px;
}

.stat-plays { color: var(--accent); }
.stat-votes { color: var(--yellow); }

/* ---------- Sort Tabs ---------- */

.sort-tabs {
    display: flex;
    gap: 4px;
    padding: 16px 24px 0;
}

.sort-tab {
    padding: 8px 16px;
    border-radius: var(--radius) var(--radius) 0 0;
    font-size: 14px;
    color: var(--text-dim);
    cursor: pointer;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
}
.sort-tab:hover {
    color: var(--text);
}
.sort-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ---------- Pagination ---------- */

.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 24px;
}

.pagination button {
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    cursor: pointer;
    font-size: 14px;
}
.pagination button:hover {
    border-color: var(--accent);
}
.pagination button:disabled {
    opacity: 0.4;
    cursor: default;
}

/* ---------- Page Layouts ---------- */

.page-center {
    max-width: 480px;
    margin: 60px auto;
    padding: 0 24px;
}

.page-wide {
    max-width: 1200px;
    margin: 0 auto;
}

.page-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
}

/* ---------- Landing Hero ---------- */

.hero {
    text-align: center;
    padding: 80px 24px 60px;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 18px;
    color: var(--text-dim);
    margin-bottom: 32px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---------- Game Canvas ---------- */

.game-container {
    position: relative;
    width: 100%;
    flex: 1;
    background: #0d0d14;
}

.game-container canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.game-page {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 56px);
}

/* ---------- Leaderboard ---------- */

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

.leaderboard th,
.leaderboard td {
    padding: 8px 12px;
    text-align: left;
    font-size: 14px;
}

.leaderboard th {
    color: var(--text-dim);
    border-bottom: 1px solid var(--border);
}

.leaderboard td {
    border-bottom: 1px solid var(--bg-input);
}

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

.leaderboard tr.lb-me td {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    font-weight: 600;
}

/* ---------- Vote Buttons ---------- */

.vote-buttons {
    display: flex;
    align-items: center;
    gap: 8px;
}

.vote-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 4px 10px;
    cursor: pointer;
    font-size: 18px;
    color: var(--text-dim);
    transition: color 0.15s, border-color 0.15s;
}
.vote-btn:hover {
    border-color: var(--accent);
    color: var(--text);
}
.vote-btn.active-up {
    color: var(--green);
    border-color: var(--green);
}
.vote-btn.active-down {
    color: var(--red);
    border-color: var(--red);
}

.vote-score {
    font-size: 16px;
    font-weight: 600;
    min-width: 24px;
    text-align: center;
}

/* ---------- Save Track Overlay ---------- */

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.overlay-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    width: 100%;
    max-width: 420px;
}

.overlay-panel h2 {
    margin-bottom: 20px;
}

/* ---------- Profile ---------- */

.profile-header {
    padding: 32px 24px;
    border-bottom: 1px solid var(--border);
}

.profile-header h1 {
    font-size: 24px;
}

.profile-stats {
    display: flex;
    gap: 24px;
    margin-top: 8px;
    font-size: 14px;
    color: var(--text-dim);
}

/* ---------- Utility ---------- */

.hidden { display: none !important; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.text-center { text-align: center; }
.text-dim { color: var(--text-dim); }
.text-sm { font-size: 13px; }