:root {
    --bg-dark: #0a0b10;
    --card-bg: rgba(18, 20, 32, 0.88);
    --border-color: rgba(255, 255, 255, 0.08);
    --neon-purple: #9d4edd;
    --neon-pink: #ff007f;
    --text-color: #f0f4f8;
    --text-muted: #828a9b;
    --font-pixel: 'Press Start 2P', monospace;
    --font-sans: 'Outfit', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
}

html {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-color);
    font-family: var(--font-sans);
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background: radial-gradient(circle at 40% 35%, #1a0d2e 0%, #0a0612 50%, #050609 100%);
    touch-action: none;
}

/* ── Game Container ─────────────────────────────────────────────────────────── */
#game-container {
    position: relative;
    /* The maze is 588 × 644 px internally. We fit it to the viewport while
       keeping its natural aspect ratio (588:644 ≈ 21:23).                    */
    width: min(95vw, calc(92vh * 588 / 644));
    height: min(92vh, calc(95vw * 644 / 588));
    max-width: 750px;
    max-height: 820px;
    border-radius: 14px;
    overflow: hidden;
    box-shadow:
        0 24px 70px rgba(0, 0, 0, 0.85),
        0 0 40px rgba(157, 78, 221, 0.18),
        inset 0 1px 0 rgba(255,255,255,0.05);
    border: 1px solid rgba(255, 255, 255, 0.06);
    touch-action: none;
    background: #060609;
}

#game-container:fullscreen {
    width:  100vw !important;
    height: 100vh !important;
    max-width:  none !important;
    max-height: none !important;
    border-radius: 0 !important;
    border: none !important;
}
#game-container:-webkit-full-screen {
    width:  100vw !important;
    height: 100vh !important;
    max-width:  none !important;
    max-height: none !important;
    border-radius: 0 !important;
    border: none !important;
}

/* ── Canvas ─────────────────────────────────────────────────────────────────── */
#game-canvas {
    position: absolute;
    top:  50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: block;
    /* actual pixel dimensions are set by JS; CSS scales it to fit the container */
    max-width:  100%;
    max-height: 100%;
    background-color: #0d0f17;
    touch-action: none;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

/* ── HUD ─────────────────────────────────────────────────────────────────────── */
#hud {
    position: absolute;
    top: 12px;
    left: 0;
    width: 100%;
    padding: 0 18px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    pointer-events: none;
    z-index: 10;
    gap: 8px;
}

.hud-item {
    background: rgba(10, 12, 22, 0.72);
    border: 1px solid var(--border-color);
    border-radius: 7px;
    padding: 5px 11px;
    display: flex;
    flex-direction: column;
    align-items: center;
    backdrop-filter: blur(6px);
}

.hud-btn {
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    pointer-events: auto;
    transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.hud-btn:hover {
    background: rgba(157, 78, 221, 0.35);
    border-color: var(--neon-purple);
    color: #fff;
}

.hud-btn:active {
    transform: scale(0.94);
}

.hud-label {
    font-family: var(--font-pixel);
    font-size: 7px;
    color: var(--text-muted);
    margin-bottom: 4px;
    letter-spacing: 0.5px;
}

.hud-value {
    font-family: var(--font-pixel);
    font-size: 13px;
    color: #fff;
    text-shadow: 0 0 6px rgba(255, 255, 255, 0.25);
}

#score-val     { color: #ffcc00; text-shadow: 0 0 8px rgba(255,204,0,0.5); }
#highscore-val { color: #00f3ff; text-shadow: 0 0 8px rgba(0,243,255,0.4); }
#level-val     { color: #c084fc; text-shadow: 0 0 8px rgba(192,132,252,0.5); }

/* ── Overlays ────────────────────────────────────────────────────────────────── */
.overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(5, 6, 12, 0.82);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 20;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* ── Card ────────────────────────────────────────────────────────────────────── */
.card {
    background: var(--card-bg);
    border: 1px solid rgba(157, 78, 221, 0.18);
    border-radius: 18px;
    padding: 28px 36px;
    width: 90%;
    max-width: 420px;
    max-height: 92%;
    overflow-y: auto;
    text-align: center;
    box-shadow:
        0 20px 50px rgba(0, 0, 0, 0.6),
        0 0 30px rgba(157, 78, 221, 0.08),
        inset 0 1px 0 rgba(255,255,255,0.04);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.border-red {
    border-color: rgba(255, 0, 127, 0.28);
    box-shadow:
        0 20px 50px rgba(0, 0, 0, 0.6),
        0 0 22px rgba(255, 0, 127, 0.12);
}

/* ── Logo / Typography ───────────────────────────────────────────────────────── */
.logo {
    font-family: var(--font-pixel);
    font-size: 22px;
    letter-spacing: 2px;
    color: #fff;
    text-shadow:
        0 0 12px var(--neon-purple),
        0 0 24px rgba(157, 78, 221, 0.4);
    line-height: 1.4;
}

.tagline {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2.5px;
}

.story-box {
    background: rgba(157, 78, 221, 0.07);
    border: 1px solid rgba(157, 78, 221, 0.2);
    border-radius: 10px;
    padding: 12px 16px;
    font-size: 13px;
    line-height: 1.55;
    color: #dde4f0;
    text-align: center;
}

/* ── Controls Card ───────────────────────────────────────────────────────────── */
.controls-card {
    background: rgba(0, 0, 0, 0.25);
    border-radius: 10px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 7px;
    font-size: 13px;
    color: var(--text-color);
}

.key {
    display: inline-block;
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.18);
    border-bottom: 2px solid rgba(0,0,0,0.6);
    border-radius: 5px;
    padding: 1px 7px;
    font-weight: 700;
    font-size: 12px;
    color: #fff;
}

/* ── Buttons ─────────────────────────────────────────────────────────────────── */
.btn {
    background: linear-gradient(135deg, var(--neon-purple) 0%, var(--neon-pink) 100%);
    border: none;
    border-radius: 9px;
    color: #fff;
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.5px;
    padding: 12px 24px;
    cursor: pointer;
    transition: transform 0.12s, box-shadow 0.12s;
    box-shadow: 0 4px 18px rgba(157, 78, 221, 0.35);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 26px rgba(157, 78, 221, 0.55);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(157, 78, 221, 0.3);
}

.btn-restart {
    background: linear-gradient(135deg, #c2185b 0%, #ff4081 100%);
    box-shadow: 0 4px 18px rgba(194, 24, 91, 0.35);
}
.btn-restart:hover { box-shadow: 0 8px 26px rgba(255, 64, 129, 0.55); }

.btn-share {
    background: linear-gradient(135deg, #0891b2 0%, #9d4edd 100%);
    box-shadow: 0 4px 18px rgba(8, 145, 178, 0.3);
}
.btn-share:hover { box-shadow: 0 8px 26px rgba(8, 145, 178, 0.5); }

.btn-back {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    text-decoration: none;
    display: inline-block;
    color: var(--text-color);
}
.btn-back:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.35);
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.45);
    color: #fff;
}
.btn-back:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* ── Game-over panel ─────────────────────────────────────────────────────────── */
.gameover-title {
    font-family: var(--font-pixel);
    font-size: 18px;
    color: #ff4081;
    text-shadow: 0 0 14px rgba(255, 64, 129, 0.5);
    letter-spacing: 2px;
}

.gameover-desc {
    font-size: 13px;
    color: var(--text-muted);
}

.scores-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.score-card {
    background: rgba(0, 0, 0, 0.28);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 10px;
    padding: 10px 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    font-size: 12px;
}

.score-card span  { color: var(--text-muted); }

.score-card strong {
    font-family: var(--font-pixel);
    font-size: 15px;
    color: #ffcc00;
    text-shadow: 0 0 8px rgba(255, 204, 0, 0.4);
}

.stats-footer {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

/* ── Scrollbar inside card (portrait mobile) ─────────────────────────────────── */
.card::-webkit-scrollbar { width: 4px; }
.card::-webkit-scrollbar-track { background: transparent; }
.card::-webkit-scrollbar-thumb { background: rgba(157, 78, 221, 0.4); border-radius: 4px; }

/* ── Responsive: small screens ───────────────────────────────────────────────── */
@media (max-width: 540px) {
    .logo      { font-size: 16px; }
    .hud-value { font-size: 10px; }
    .card      { padding: 18px 16px; gap: 10px; }
}

@media (max-height: 680px) {
    .card  { padding: 16px 20px; gap: 8px; }
    .story-box { font-size: 11px; padding: 8px 12px; }
    .controls-card { font-size: 11px; padding: 8px 10px; gap: 5px; }
    .logo  { font-size: 16px; }
    .tagline { font-size: 9px; }
}

/* ── Portrait devices ─────────────────────────────────────────────────────────── */
@media (max-aspect-ratio: 3/4) {
    #game-container {
        width:  96vw;
        height: min(90vh, calc(96vw * 644 / 588));
        max-height: 92vh;
        max-width: 500px;
    }

    #hud { padding: 0 12px; top: 8px; }
    .hud-item { padding: 4px 8px; }
    .hud-value { font-size: 10px; }
    .hud-label { font-size: 6px; }
}