* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --bg: #0f0f1a;
    --surface: #1a1a2e;
    --border: #2a2a4a;
    --accent: #6c63ff;
    --accent2: #ff6584;
    --text: #e0e0e0;
    --text-muted: #777;
    --win: #00e676;
    --panel-width: 440px;
    --font-base: 0.95rem;
    --font-sm: 0.88rem;
    --font-xs: 0.8rem;
}

body {
    font-family: "Segoe UI", system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    overflow: hidden;
}

/* ── App Layout ── */
.app {
    display: flex;
    height: 100vh;
}

.grid-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px;
    min-width: 0;
    overflow: hidden;
}

.panel {
    width: var(--panel-width);
    min-width: var(--panel-width);
    background: var(--surface);
    border-left: 1px solid var(--border);
    padding: 20px 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* ── Title ── */
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
h1 {
    font-size: 1.9rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 2px;
    margin-bottom: 2px;
}
.subtitle {
    font-size: var(--font-sm);
    color: var(--text-muted);
    margin-bottom: 10px;
}
.hint-box {
    margin-top: 10px;
    padding: 6px 10px;
    border-radius: 6px;
    background: rgba(108, 99, 255, 0.08);
    border: 1px solid rgba(108, 99, 255, 0.2);
    color: var(--text);
    font-size: var(--font-sm);
    text-align: center;
}

/* ── Sections ── */
.section {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    margin-bottom: 6px;
}
.section-title {
    font-size: var(--font-xs);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

/* ── Field rows ── */
.field-row {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 6px;
}
.field-row:last-child {
    margin-bottom: 0;
}
.field-row label {
    font-size: var(--font-base);
    color: var(--text);
}

/* ── Inputs ── */
input[type="number"] {
    width: 56px;
    padding: 6px 6px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: var(--font-base);
    text-align: center;
    outline: none;
    transition: border 0.2s;
}
input[type="number"]:focus {
    border-color: var(--accent);
}
select {
    padding: 6px 28px 6px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: var(--font-base);
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    flex: 1;
    min-width: 0;
}
select:focus {
    border-color: var(--accent);
}
input:disabled,
select:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
span.x {
    font-size: var(--font-base);
    color: var(--text-muted);
    font-weight: 700;
}

/* ── Toggle ── */
.toggle-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: var(--font-base);
    color: var(--text);
    user-select: none;
}
.toggle-label input {
    display: none;
}
.toggle-track {
    width: 32px;
    height: 18px;
    border-radius: 9px;
    background: #2a2a4a;
    position: relative;
    transition: background 0.2s;
    flex-shrink: 0;
}
.toggle-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #666;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: all 0.2s;
}
.toggle-label input:checked + .toggle-track {
    background: var(--accent);
}
.toggle-label input:checked + .toggle-track .toggle-thumb {
    left: 16px;
    background: #fff;
}

/* ── Speed / Vision slider ── */
.speed-label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: var(--font-sm);
    color: var(--text);
}
.speed-label input[type="range"] {
    width: 60px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: #2a2a4a;
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}
.speed-label input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

/* ── Buttons ── */
.btn {
    padding: 6px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: var(--font-base);
    font-weight: 600;
    transition: all 0.2s;
    white-space: nowrap;
    line-height: 1.2;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    color: #fff;
    box-shadow: 0 3px 12px rgba(108, 99, 255, 0.3);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 16px rgba(108, 99, 255, 0.45);
}
.btn-primary:active {
    transform: translateY(0);
}
.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}
.btn-secondary {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    border-color: var(--accent);
    color: #fff;
}
.btn-danger {
    background: linear-gradient(135deg, #e53935, #ff6584);
    color: #fff;
    box-shadow: 0 3px 12px rgba(255, 101, 132, 0.25);
}
.btn-danger:hover {
    transform: translateY(-1px);
}
.btn-preset {
    padding: 5px 10px;
    font-size: var(--font-sm);
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    line-height: 1.2;
}
.btn-preset:hover {
    border-color: var(--accent);
    color: var(--text);
}

/* ── Legend ── */
.legend {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 8px;
    font-size: var(--font-sm);
    color: var(--text-muted);
}
.legend span {
    display: flex;
    align-items: center;
    gap: 4px;
}
.dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    display: inline-block;
}
.dot-player { background: var(--accent); }
.dot-exit { background: var(--win); }
.dot-trail { background: #e6783a; }
.dot-gen { background: #ff6584; }

/* ── Stats ── */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 3px 10px;
    font-size: var(--font-base);
    color: var(--text);
}

/* ── Results ── */
.results {
    border-color: var(--win);
    background: rgba(0, 230, 118, 0.03);
}
.results .section-title {
    color: var(--win);
    font-size: var(--font-base);
}
.results p {
    font-size: var(--font-base);
    color: var(--text);
    margin-bottom: 8px;
}
.results canvas {
    display: block;
    width: 100%;
    border-radius: 6px;
    background: var(--bg);
}

/* ── Maze wrapper ── */
.maze-wrapper {
    padding: 8px;
    border-radius: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    flex-shrink: 0;
    touch-action: none;
}
.maze-wrapper canvas {
    display: block;
    border-radius: 6px;
}

/* ── Mobile D-Pad ── */
.dpad {
    display: none;
    margin-top: 12px;
}
.dpad-row {
    display: flex;
    justify-content: center;
    gap: 6px;
}
.dpad .btn-dir {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
    user-select: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}
.dpad .btn-dir:active {
    background: var(--accent);
    color: #fff;
}
.dpad .btn-dir.spacer {
    visibility: hidden;
}

/* ── Footer ── */
footer {
    margin-top: auto;
    padding-top: 16px;
    font-size: var(--font-xs);
    color: var(--text-muted);
    text-align: center;
}

/* ── Language button ── */
.btn-lang {
    padding: 3px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    font-size: var(--font-sm);
    cursor: pointer;
    transition: border-color 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
}
.btn-lang:hover {
    border-color: var(--accent);
    opacity: 1;
}

/* ── Mobile responsive ── */
@media (max-width: 768px) {
    body {
        height: auto;
        overflow: auto;
        overscroll-behavior: none;
    }
    .app {
        flex-direction: column;
        height: auto;
    }
    .grid-area {
        flex: none;
        padding: 16px;
        min-height: auto;
        overflow: visible;
    }
    .panel {
        width: 100%;
        min-width: 100%;
        border-left: none;
        border-top: 1px solid var(--border);
    }
    .dpad {
        display: block;
    }
    h1 {
        font-size: 1.4rem;
    }
    .hint-box {
        display: none;
    }
}