/**
 * Cube Rush (original fan-inspired rhythm runner) - Game Styles
 *
 * Uses design tokens from public/assets/css/main.css. No hard-coded colors or
 * spacing. Container centered with `margin: 0 auto`. All interactive elements
 * have hover / focus / active states. Light + dark theme support. Mobile-first,
 * tap targets >= 44px, no horizontal scroll.
 */

/* ===== Custom Properties (all derived from design tokens) ===== */
:root {
    /* Canvas colors (read into the canvas for theme-aware contrast) */
    --cr-canvas-bg: var(--color-bg-alt);
    --cr-canvas-grid: var(--color-border);
    --cr-cube: var(--color-primary);
    --cr-cube-edge: var(--color-primary-dark);
    --cr-spike: var(--color-error);
    --cr-block: var(--color-text-muted);
    --cr-pad: var(--color-success);
    --cr-portal: var(--color-primary-light);

    --cr-radius: var(--radius-lg);
    --cr-radius-sm: var(--radius-md);
    --cr-transition: var(--transition-base);
    --cr-min-touch: 44px;
}

[data-theme="dark"] {
    --cr-canvas-bg: var(--color-bg);
    --cr-canvas-grid: var(--color-border-dark);
    --cr-cube: var(--color-primary-light);
    --cr-cube-edge: var(--color-primary);
    --cr-spike: var(--color-error-text);
    --cr-block: var(--color-text-muted);
    --cr-pad: var(--color-success-text);
    --cr-portal: var(--color-primary);
}

/* ===== Container ===== */
.cr-container {
    width: 100%;
    max-width: 1040px;
    margin: 0 auto;
}

.cube-rush {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--cr-radius);
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--space-8);
}

/* ===== Level selector ===== */
.cr-level-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}
.cr-level {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    text-align: left;
    padding: var(--space-3) var(--space-4);
    min-height: var(--cr-min-touch);
    background: var(--color-bg-alt);
    color: var(--color-text);
    border: 2px solid var(--color-border);
    border-radius: var(--cr-radius-sm);
    cursor: pointer;
    transition: border-color var(--cr-transition), background var(--cr-transition);
}
.cr-level:hover { border-color: var(--color-primary); background: var(--color-bg-card); }
.cr-level:focus-visible { box-shadow: var(--focus-ring); outline: none; }
.cr-level:active { transform: scale(0.99); }
.cr-level.active { border-color: var(--color-primary); background: var(--color-bg-card); box-shadow: var(--focus-ring); }
.cr-level.unavailable { opacity: 0.5; cursor: not-allowed; }
.cr-level-name { font-weight: 600; }
.cr-level-tier {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-muted);
}
.cr-tier-easy { color: var(--color-success-text); }
.cr-tier-normal { color: var(--color-primary); }
.cr-tier-hard { color: var(--color-warning-text); }
.cr-tier-harder { color: var(--color-error-text); }
.cr-tier-insane { color: var(--color-error-text); }
.cr-level-meta { font-size: var(--font-size-xs); color: var(--color-text-muted); }

/* ===== Status bar ===== */
.cr-statusbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--cr-radius-sm);
    margin-bottom: var(--space-3);
}
.cr-statusbar .cr-field {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
}
.cr-statusbar .cr-field strong { font-weight: 600; }
.cr-statusbar .cr-spacer { flex: 1 1 auto; }

/* ===== Buttons ===== */
.cr-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: var(--cr-min-touch);
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--cr-radius-sm);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: background var(--cr-transition), border-color var(--cr-transition), color var(--cr-transition);
}
.cr-btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.cr-btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); }
.cr-btn-primary:focus-visible { box-shadow: var(--focus-ring); outline: none; }
.cr-btn-primary:active { transform: scale(0.98); }
.cr-btn-secondary { background: var(--color-bg-alt); color: var(--color-text); }
.cr-btn-secondary:hover { border-color: var(--color-primary); background: var(--color-bg-card); }
.cr-btn-secondary:focus-visible { box-shadow: var(--focus-ring); outline: none; }
.cr-btn-secondary:active { transform: scale(0.98); }
.cr-btn[aria-pressed="true"] {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* ===== Progress bar ===== */
.cr-progress {
    position: relative;
    height: 12px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: var(--space-3);
}
.cr-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--color-primary);
    border-radius: 999px;
    transition: width var(--transition-fast);
}
.cr-progress-best {
    position: absolute;
    top: -2px;
    bottom: -2px;
    left: 0%;
    width: 2px;
    background: var(--color-text-muted);
}
.cr-progress-labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
}

/* ===== Canvas play area ===== */
.cr-stage {
    position: relative;
    width: 100%;
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: var(--cr-radius-sm);
    background: var(--color-bg);
    margin-bottom: var(--space-4);
}
.cr-canvas {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    touch-action: manipulation;
    cursor: pointer;
}
.cr-canvas:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: -3px;
}

/* ===== Overlays ===== */
.cr-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-6);
    text-align: center;
    background: color-mix(in srgb, var(--color-bg) 82%, transparent);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
}
.cr-overlay[hidden] { display: none; }
.cr-overlay h2 { margin: 0; font-size: var(--font-size-2xl); }
.cr-overlay p { margin: 0; color: var(--color-text-muted); font-size: var(--font-size-base); }
.cr-overlay-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); justify-content: center; margin-top: var(--space-2); }

/* ===== Controls row ===== */
.cr-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}
.cr-controls .cr-btn { flex: 1 1 auto; min-width: 120px; }

/* ===== Fullscreen note ===== */
.cr-fullscreen-note {
    margin-top: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}
.cr-fullscreen-note[hidden] { display: none; }

/* ===== Native fullscreen (the #cube-rush card is the fullscreen element) ===== */
.cube-rush:fullscreen {
    width: 100%;
    height: 100%;
    max-height: 100vh;
    margin: 0;
    border: 0;
    border-radius: 0;
    overflow: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-bg);
}
.cube-rush:fullscreen .cr-level-selector { width: 100%; max-width: 720px; }
.cube-rush:fullscreen .cr-statusbar,
.cube-rush:fullscreen .cr-progress,
.cube-rush:fullscreen .cr-progress-labels,
.cube-rush:fullscreen .cr-controls { width: 100%; max-width: 720px; }
.cube-rush:fullscreen .cr-stage {
    flex: 1 1 auto;
    min-height: 55vh;
    width: 100%;
    max-width: 1200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 0;
}

/* ===== In-page layout fullscreen fallback (browser blocked native) ===== */
.cube-rush.cr-layout-fullscreen {
    position: fixed;
    inset: 0;
    z-index: 1000;
    margin: 0;
    border: 0;
    border-radius: 0;
    max-height: 100vh;
    overflow: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-bg);
}
.cube-rush.cr-layout-fullscreen .cr-stage {
    flex: 1 1 auto;
    min-height: 55vh;
    width: 100%;
    max-width: 1200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 0;
}

/* ===== Help panel (modal) ===== */
.help-panel {
    position: fixed;
    inset: 0;
    z-index: 1100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    background: color-mix(in srgb, var(--color-bg) 70%, transparent);
}
.help-panel[hidden] { display: none; }
.help-content {
    width: 100%;
    max-width: 560px;
    max-height: 85vh;
    overflow: auto;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--cr-radius);
    box-shadow: var(--shadow-lg);
    padding: var(--space-6);
}
.help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}
.help-header h2 { margin: 0; font-size: var(--font-size-2xl); }
.help-section { margin-bottom: var(--space-5); }
.help-section h3 { margin: 0 0 var(--space-2); font-size: var(--font-size-xl); }
.help-steps, .help-list { margin: 0; padding-left: var(--space-5); }
.help-steps li, .help-list li { margin-bottom: var(--space-2); }
.help-definitions { margin: 0; }
.help-definitions .definition-item, .help-shortcuts .shortcut-item { margin-bottom: var(--space-3); }
.help-definitions dt, .help-shortcuts dt { font-weight: 600; }
.help-definitions dd, .help-shortcuts dd { margin: var(--space-1) 0 0; color: var(--color-text-muted); }
kbd {
    display: inline-block;
    padding: 0 var(--space-1);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
}

/* ===== Use cases + FAQ (shared page sections) ===== */
/* `auto` horizontal margins keep .use-cases (max-width:900px, set in main.css) centered;
   overriding with a fixed `0` previously pinned the box to the left edge. */
.use-cases, .faq-section { margin: var(--space-10) auto; }
.use-cases h2, .faq-section h2 { margin-bottom: var(--space-3); }
.use-cases-intro { color: var(--color-text-muted); margin-bottom: var(--space-4); }
.use-cases-list { list-style: none; padding: 0; margin: 0; }
.use-cases-list li {
    padding: var(--space-4);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--cr-radius-sm);
    margin-bottom: var(--space-3);
}
.use-cases-list strong { display: block; margin-bottom: var(--space-2); }
.faq-list { margin: 0; }
.faq-item { margin-bottom: var(--space-4); }
.faq-item dt { font-weight: 600; margin-bottom: var(--space-1); }
.faq-item dd { margin: 0; color: var(--color-text-muted); }

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .cube-rush { padding: var(--space-4); }
    .cr-controls .cr-btn { min-width: calc(50% - var(--space-1)); }
    .cr-statusbar { gap: var(--space-2); }
}

@media (prefers-reduced-motion: reduce) {
    .cr-progress-fill { transition: none; }
}