:root {
    --bg: #15161c;
    --surface: rgba(255, 255, 255, 0.035);
    --border: rgba(255, 255, 255, 0.08);
    --text: #e7e8ec;
    --text-dim: #8b8e99;
    --accent: #79b894;
    --food: #e0a16b;
    --overlay: rgba(21, 22, 28, 0.82);
    --btn-text: #10221a;
    --font: 'Segoe UI', 'Trebuchet MS', system-ui, sans-serif;
}

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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 16px;
    background: var(--bg);
    font-family: var(--font);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s ease, color 0.3s ease;
}

.game-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    min-height: 460px;
    padding: 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
    display: flex;
    flex-direction: column;
}

.score-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2px 6px;
    margin-bottom: 14px;
    flex-shrink: 0;
}

.score, .high-score {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.score span { color: var(--accent); }
.high-score span { color: var(--food); }

.board {
    position: relative;
    line-height: 0;
}

/* Floating board buttons — sit on the board corners, only visible while
   playing (the overlays cover them on every other screen) */
.board-btn {
    position: absolute;
    top: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    color: rgba(255, 255, 255, 0.85);
    background: rgba(15, 16, 22, 0.4);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
    opacity: 0.6;
    transition: opacity 0.15s ease, background 0.15s ease;
}

.board-btn:hover {
    opacity: 1;
    background: rgba(15, 16, 22, 0.7);
}

.board-btn svg {
    display: block;
}

.board-exit { right: 10px; }
.board-mute { left: 10px; }

canvas {
    width: 100%;
    height: auto;
    aspect-ratio: 1;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg);
    display: block;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--overlay);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    border-radius: 16px;
    color: var(--text);
    font-size: 20px;
    text-align: center;
    padding: 24px;
}

.title {
    font-size: 34px;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 16px;
    color: var(--text);
}

.high-score-display {
    font-size: 14px;
    letter-spacing: 0.04em;
    color: var(--text-dim);
}
.high-score-display span { color: var(--food); }

.score-summary {
    margin: 18px 0;
    font-size: 17px;
    line-height: 1.7;
    color: var(--text-dim);
}
.score-summary span { color: var(--text); font-weight: 600; }

.controls {
    margin-top: 22px;
    font-size: 13px;
    letter-spacing: 0.03em;
    color: var(--text-dim);
}

.controls p { margin: 5px 0; }

.action-button {
    margin-top: 22px;
    padding: 12px 32px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    background: var(--accent);
    border: none;
    border-radius: 10px;
    color: var(--btn-text);
    cursor: pointer;
    transition: background 0.18s ease, transform 0.18s ease, filter 0.18s ease;
}

.action-button:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
}

.action-button:active {
    transform: translateY(0);
}

/* Muted secondary button (e.g. Main Menu) */
.action-button.secondary {
    margin-top: 10px;
    padding: 9px 24px;
    font-size: 12px;
    background: transparent;
    color: var(--text-dim);
    border: 1px solid var(--border);
}

.action-button.secondary:hover {
    filter: none;
    transform: none;
    color: var(--text);
    border-color: var(--accent);
}

.debug-panel {
    position: fixed;
    top: 12px;
    right: 12px;
    background: rgba(21, 22, 28, 0.92);
    border: 1px solid var(--border);
    padding: 12px;
    border-radius: 8px;
    max-width: 300px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: var(--text);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.debug-panel h3 {
    margin-bottom: 8px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
}

#debugInfo { white-space: pre-wrap; color: var(--text-dim); }

/* Theme picker */
.theme-section {
    margin-top: 22px;
}

.theme-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 10px;
}

.theme-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    max-width: 320px;
}

.theme-swatch {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 11px;
    border: 1px solid var(--border);
    border-radius: 9px;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.theme-swatch:hover {
    transform: translateY(-1px);
}

.theme-swatch.active {
    box-shadow: 0 0 0 2px var(--accent);
}

.sw-dots {
    display: inline-flex;
    gap: 3px;
}

.sw-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15);
}

.sw-label {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* Music picker */
.music-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    max-width: 320px;
}

.music-chip {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: var(--surface);
    color: var(--text-dim);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: color 0.15s ease, box-shadow 0.15s ease;
}

.music-chip:hover {
    color: var(--text);
}

.music-chip.active {
    color: var(--text);
    box-shadow: 0 0 0 2px var(--accent);
}

/* Gentle entrance for overlay contents */
@keyframes slideIn {
    from { transform: translateY(-10px); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}

.overlay > * {
    animation: slideIn 0.28s ease-out both;
}

/* Responsive design */
@media (max-width: 480px) {
    .game-container {
        min-height: auto;
        height: auto;
        padding: 14px;
    }

    canvas { margin: 0 auto; }
    .title { font-size: 28px; }
    .score, .high-score { font-size: 12px; }
}

/* Touch controls for mobile */
@media (hover: none) {
    .touch-controls {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
        margin-top: 18px;
    }

    .touch-button {
        padding: 16px;
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 10px;
        color: var(--text);
        font-size: 20px;
        transition: background 0.15s ease;
    }

    .touch-button:active {
        background: rgba(255, 255, 255, 0.1);
    }
}