:root {
    --bg: #87ceeb;
    --road: #4a4a4a;
    --accent: #fbbf24;
    --ink: #fff8e8;
    --panel: rgba(0, 0, 0, 0.45);
}

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

html, body {
    height: 100%;
    height: 100dvh;
    overflow: hidden;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg);
}

.is-hidden {
    display: none !important;
}

#game-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

/* ─── Car selection ───────────────────────────────────── */
.car-select {
    position: fixed;
    inset: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: max(16px, env(safe-area-inset-top)) 16px max(24px, env(safe-area-inset-bottom));
    background:
        radial-gradient(1200px 600px at 50% 20%, rgba(255, 184, 108, 0.35) 0%, rgba(0,0,0,0) 60%),
        linear-gradient(180deg, rgba(12, 16, 30, 0.35) 0%, rgba(8, 10, 18, 0.62) 100%),
        url("../assets/textures/backgound.jpg");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow-y: auto;
}

.car-select.is-hidden {
    display: none !important;
}

.hub-back--select {
    align-self: flex-start;
    position: relative;
    top: auto;
    left: auto;
    margin-bottom: 12px;
}

.car-select__header {
    text-align: center;
    margin-bottom: 20px;
}

.car-select__header h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(1.2rem, 4vw, 1.6rem);
    color: #1a1208;
    margin-bottom: 6px;
}

.car-select__header p {
    font-size: 0.75rem;
    color: rgba(26, 18, 8, 0.65);
}

.car-select__header code {
    font-size: 0.7rem;
    background: rgba(0, 0, 0, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
}

.car-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 14px;
    width: 100%;
    max-width: 520px;
    flex: 1;
    align-content: start;
}

.car-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.35);
    border: 3px solid transparent;
    border-radius: 14px;
    cursor: pointer;
    transition: border-color 0.15s, transform 0.15s, background 0.15s;
    -webkit-tap-highlight-color: transparent;
}

.car-card:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.car-card.is-selected {
    border-color: #f59e0b;
    background: rgba(255, 248, 232, 0.75);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.car-card__preview {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 10px;
    display: block;
}

.car-card__preview--gl {
    background: #5a8ab5;
}

.car-card__preview--gl[hidden] {
    display: none !important;
}

.car-select__loading,
.car-select__hint {
    grid-column: 1 / -1;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(26, 18, 8, 0.75);
    padding: 8px 0;
}

.car-card__name {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    color: #1a1208;
    text-transform: capitalize;
    text-align: center;
    line-height: 1.2;
}

.car-card__err {
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

.car-select__error {
    grid-column: 1 / -1;
    text-align: center;
    color: #7f1d1d;
    font-size: 0.85rem;
}

.btn-start {
    margin-top: 20px;
    min-width: 200px;
    min-height: 56px;
    font-size: 1.1rem;
    background: linear-gradient(180deg, #fde047 0%, var(--accent) 100%);
    box-shadow: 0 4px 0 #b45309, 0 10px 28px rgba(0, 0, 0, 0.2);
}

.btn-start:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}

.ui-layer {
    position: fixed;
    inset: 0;
    z-index: 10;
    pointer-events: none;
}

.ui-layer a,
.ui-layer button {
    pointer-events: auto;
}

.hub-back {
    position: fixed;
    top: max(12px, env(safe-area-inset-top));
    left: max(12px, env(safe-area-inset-left));
    padding: 8px 14px;
    font-size: 0.75rem;
    color: var(--ink);
    text-decoration: none;
    background: var(--panel);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
}

.controls {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 12px max(16px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom))
             max(16px, env(safe-area-inset-left));
    display: flex;
    gap: 12px;
    align-items: stretch;
    justify-content: center;
}

.btn {
    font-family: 'Orbitron', 'JetBrains Mono', sans-serif;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    color: #1a1208;
    font-weight: 700;
    letter-spacing: 0.06em;
    transition: transform 0.1s ease, filter 0.15s ease;
    -webkit-tap-highlight-color: transparent;
}

.btn:active,
.btn.is-active {
    transform: scale(0.96);
    filter: brightness(1.1);
}

.btn-icon {
    flex: 0 0 auto;
    width: 64px;
    height: 64px;
    min-width: 64px;
    min-height: 64px;
    padding: 0;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn__icon {
    width: 32px;
    height: 32px;
    display: block;
    pointer-events: none;
    object-fit: contain;
}

.btn-gas {
    background: linear-gradient(180deg, #fde047 0%, var(--accent) 100%);
    box-shadow: 0 4px 0 #b45309, 0 8px 24px rgba(0, 0, 0, 0.25);
}

.btn-ramp {
    background: linear-gradient(180deg, #fcd34d 0%, #f59e0b 100%);
    box-shadow: 0 4px 0 #92400e, 0 8px 20px rgba(0, 0, 0, 0.2);
}

.btn-car {
    background: linear-gradient(180deg, #e0e7ff 0%, #93c5fd 100%);
    box-shadow: 0 4px 0 #1d4ed8, 0 8px 20px rgba(0, 0, 0, 0.2);
}

.hint-bar {
    position: fixed;
    top: max(12px, env(safe-area-inset-top));
    right: max(12px, env(safe-area-inset-right));
    padding: 8px 12px;
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.7);
    background: var(--panel);
    border-radius: 8px;
    max-width: 140px;
    line-height: 1.35;
    text-align: right;
}

/* ─── Game loading overlay ────────────────────────────── */
.game-loading {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    background:
        radial-gradient(900px 500px at 50% 40%, rgba(255, 184, 108, 0.25) 0%, rgba(0, 0, 0, 0) 55%),
        linear-gradient(180deg, rgba(20, 24, 40, 0.88) 0%, rgba(8, 10, 18, 0.94) 100%);
    pointer-events: all;
}

.game-loading__spinner {
    width: 52px;
    height: 52px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: game-loading-spin 0.85s linear infinite;
}

.game-loading__text {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    color: var(--ink);
    text-transform: uppercase;
}

@keyframes game-loading-spin {
    to { transform: rotate(360deg); }
}