/* Brainy Warrior 3D: Game Lab's Cyber Yellow & Obsidian on top of a full-screen 3D stage.
   Fonts are the hub's self-hosted Chakra Petch and Albert Sans (assets/fonts, OFL). */
@font-face {
    font-family: 'Chakra Petch';
    src: url('../assets/fonts/chakra-petch-latin-600-normal.woff2') format('woff2');
    font-weight: 600;
    font-display: swap;
}
@font-face {
    font-family: 'Chakra Petch';
    src: url('../assets/fonts/chakra-petch-latin-700-normal.woff2') format('woff2');
    font-weight: 700;
    font-display: swap;
}
@font-face {
    font-family: 'Albert Sans';
    src: url('../assets/fonts/albert-sans-latin-400-normal.woff2') format('woff2');
    font-weight: 400;
    font-display: swap;
}
@font-face {
    font-family: 'Albert Sans';
    src: url('../assets/fonts/albert-sans-latin-600-normal.woff2') format('woff2');
    font-weight: 600;
    font-display: swap;
}

:root {
    --ink: #09090b;
    --glass: rgba(14, 15, 20, 0.84);
    --glass-strong: rgba(14, 15, 20, 0.92);
    --line: rgba(250, 204, 21, 0.22);
    --line-soft: rgba(255, 255, 255, 0.08);
    --text: #f4f4f5;
    --muted: #a1a1aa;
    --accent: #facc15;
    --accent-ink: #1a1400;
    --cyan: #22d3ee;
    --violet: #a78bfa;
    --danger: #fb7185;
    --display: 'Chakra Petch', 'Albert Sans', system-ui, sans-serif;
    --body: 'Albert Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --gap: max(10px, env(safe-area-inset-left));
}

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

html,
body {
    height: 100%;
    overflow: hidden;
    background: var(--ink);
    color: var(--text);
    font-family: var(--body);
    -webkit-font-smoothing: antialiased;
    overscroll-behavior: none;
}

[hidden] {
    display: none !important;
}

button {
    font: inherit;
    color: inherit;
}

svg {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.stage {
    position: fixed;
    inset: 0;
    touch-action: none;
}

.stage canvas {
    display: block;
    width: 100%;
    height: 100%;
    outline: none;
}

/* ---------- HUD ---------- */

.hud {
    position: fixed;
    top: max(10px, env(safe-area-inset-top));
    left: var(--gap);
    right: var(--gap);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 10px;
    align-items: start;
    pointer-events: none;
    z-index: 10;
}

.hud-card {
    pointer-events: auto;
    background: var(--glass);
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.hud-level {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 8px 14px 8px 8px;
    min-width: 0;
    max-width: 460px;
    justify-self: start;
}

.lvl-badge {
    flex: none;
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--accent);
    color: var(--accent-ink);
    font: 700 20px/1 var(--display);
    box-shadow: 0 0 22px rgba(250, 204, 21, 0.35);
}

.lvl-text {
    min-width: 0;
}

.lvl-text h1 {
    font: 700 18px/1.15 var(--display);
    letter-spacing: 0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tip {
    margin-top: 3px;
    font-size: 13px;
    line-height: 1.3;
    color: var(--muted);
}

.hud-stats {
    display: flex;
    padding: 6px 4px;
}

.stat {
    display: grid;
    justify-items: center;
    padding: 2px 12px;
    min-width: 66px;
}

.stat + .stat {
    border-left: 1px solid var(--line-soft);
}

.stat span {
    font: 600 10px/1 var(--display);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.stat b {
    margin-top: 4px;
    font: 700 24px/1 var(--display);
    font-variant-numeric: tabular-nums;
}

.stat b.over {
    color: var(--danger);
}

.stat b.on-par {
    color: var(--accent);
}

.toolbar {
    display: flex;
    gap: 2px;
    padding: 5px;
}

.tool {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    min-width: 52px;
    height: 50px;
    padding: 0 6px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    cursor: pointer;
    font: 600 10px/1 var(--display);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text);
    transition: background-color 120ms ease, color 120ms ease;
    -webkit-tap-highlight-color: transparent;
}

.tool svg {
    width: 20px;
    height: 20px;
}

.tool-icon {
    min-width: 40px;
}

.tool:hover,
.tool:focus-visible {
    background: rgba(250, 204, 21, 0.14);
    color: var(--accent);
    outline: none;
}

.tool:active {
    background: var(--accent);
    color: var(--accent-ink);
}

.tool[disabled] {
    opacity: 0.35;
    pointer-events: none;
}

.tool-magic {
    color: var(--violet);
}

.tool .off,
.tool[aria-pressed='true'] .on {
    display: none;
}

.tool[aria-pressed='true'] .off {
    display: block;
}

/* The speaker button has a long press (music only): no callout or text selection. */
#btn-sound {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

/* ---------- Banner + toast ---------- */

.banner {
    position: fixed;
    left: 50%;
    bottom: max(24px, env(safe-area-inset-bottom));
    transform: translateX(-50%);
    z-index: 12;
    display: flex;
    gap: 14px;
    align-items: center;
    max-width: calc(100vw - 32px);
    padding: 10px 10px 10px 18px;
    border-radius: 14px;
    background: var(--glass-strong);
    border: 1px solid rgba(251, 113, 133, 0.5);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
    font-weight: 600;
}

.banner.good {
    border-color: var(--line);
}

/* ---------- loading state (character models) ---------- */
.loading {
    position: fixed;
    inset: 0;
    z-index: 40;
    display: grid;
    place-content: center;
    gap: 14px;
    justify-items: center;
    background: radial-gradient(circle at 50% 45%, rgba(14, 15, 20, 0.7), rgba(9, 9, 11, 0.94));
    color: var(--text);
    font: 600 15px/1.2 var(--display);
    letter-spacing: 0.02em;
}
.loading[hidden] {
    display: none;
}
.loading p {
    margin: 0;
}
.loading-track {
    width: min(240px, 60vw);
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    overflow: hidden;
}
.loading-bar {
    height: 100%;
    background: var(--accent);
    transform: scaleX(0.04);
    transform-origin: left;
    transition: transform 0.2s ease-out;
}

/* ---------- developer perf overlay (?perf=1) ---------- */
.perf-overlay {
    position: fixed;
    left: 8px;
    bottom: 8px;
    z-index: 60;
    margin: 0;
    padding: 8px 10px;
    border-radius: 8px;
    background: rgba(9, 9, 11, 0.82);
    border: 1px solid var(--line);
    color: #d4d4d8;
    font: 11px/1.45 ui-monospace, SFMono-Regular, Menlo, monospace;
    pointer-events: none;
    white-space: pre;
}

.toast {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 15;
    padding: 12px 20px;
    border-radius: 12px;
    background: var(--glass-strong);
    border: 1px solid var(--line);
    font: 600 16px/1.3 var(--display);
    text-align: center;
    pointer-events: none;
    animation: toast-in 180ms ease-out;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
}

/* ---------- Buttons ---------- */

.btn {
    min-height: 44px;
    padding: 0 18px;
    border-radius: 11px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.06);
    font: 700 14px/1 var(--display);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background-color 120ms ease, border-color 120ms ease, transform 80ms ease;
}

.btn:hover,
.btn:focus-visible {
    border-color: var(--accent);
    outline: none;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-ink);
    box-shadow: 0 0 24px rgba(250, 204, 21, 0.3);
}

.btn-primary:hover,
.btn-primary:focus-visible {
    background: #fde047;
}

.close {
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    font-size: 28px;
    line-height: 1;
    color: var(--muted);
    cursor: pointer;
}

.close:hover,
.close:focus-visible {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.06);
    outline: none;
}

/* ---------- AI panel ---------- */

.ai-panel {
    position: fixed;
    right: var(--gap);
    bottom: max(16px, env(safe-area-inset-bottom));
    z-index: 11;
    width: min(360px, calc(100vw - 20px));
    padding: 14px;
    border-radius: 16px;
    background: var(--glass-strong);
    border: 1px solid var(--line);
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.5);
}

.ai-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ai-head h2 {
    font: 700 17px/1 var(--display);
}

.algos {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    margin-top: 10px;
}

.algo {
    min-height: 40px;
    border-radius: 9px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.05);
    font: 700 13px/1 var(--display);
    cursor: pointer;
}

.algo[aria-checked='true'] {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-ink);
}

.algo-note {
    margin-top: 8px;
    min-height: 34px;
    font-size: 13px;
    line-height: 1.35;
    color: var(--muted);
}

.ai-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-top: 8px;
}

.ai-stats div {
    padding: 8px 4px;
    border-radius: 9px;
    background: rgba(255, 255, 255, 0.04);
    text-align: center;
}

.ai-stats dt {
    font: 600 9px/1 var(--display);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.ai-stats dd {
    margin-top: 5px;
    font: 700 17px/1 var(--display);
    font-variant-numeric: tabular-nums;
    color: var(--cyan);
}

.ai-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.ai-actions .btn {
    flex: 1;
}

.compare {
    width: 100%;
    margin-top: 10px;
    border-collapse: collapse;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.compare th,
.compare td {
    padding: 5px 6px;
    text-align: right;
    border-bottom: 1px solid var(--line-soft);
}

.compare th:first-child,
.compare td:first-child {
    text-align: left;
}

.compare th {
    font: 600 10px/1 var(--display);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
}

.compare .opt {
    color: var(--accent);
    font-weight: 600;
}

/* ---------- Overlays ---------- */

.overlay {
    position: fixed;
    inset: 0;
    z-index: 20;
    display: grid;
    place-items: center;
    padding: 16px;
    background: rgba(5, 6, 9, 0.7);
    animation: fade-in 200ms ease-out;
}

.overlay-soft {
    background: rgba(5, 6, 9, 0.35);
}

@keyframes fade-in {
    from {
        opacity: 0;
    }
}

.dialog {
    width: min(420px, 100%);
    max-height: calc(100dvh - 32px);
    overflow: auto;
    padding: 24px;
    border-radius: 20px;
    background: var(--glass-strong);
    border: 1px solid var(--line);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(0, 0, 0, 0.4);
    text-align: center;
    animation: pop-in 260ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

@keyframes pop-in {
    from {
        transform: scale(0.92);
        opacity: 0;
    }
}

.dialog-wide {
    width: min(760px, 100%);
    text-align: left;
}

.dialog h2 {
    font: 700 30px/1.1 var(--display);
    letter-spacing: 0.02em;
}

.dialog p {
    margin-top: 8px;
    color: var(--muted);
    line-height: 1.45;
}

.dialog-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.stars {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-bottom: 10px;
}

.stars svg {
    width: 52px;
    height: 52px;
    fill: rgba(255, 255, 255, 0.08);
    stroke: rgba(255, 255, 255, 0.2);
    stroke-width: 1.2;
}

.stars svg.lit {
    fill: var(--accent);
    stroke: #fde68a;
    filter: drop-shadow(0 0 10px rgba(250, 204, 21, 0.6));
    animation: star-pop 420ms cubic-bezier(0.2, 1.6, 0.4, 1) both;
}

.stars svg:nth-child(2) {
    transform: translateY(-10px) scale(1.15);
}

.stars svg.lit:nth-child(2) {
    animation-delay: 140ms;
}

.stars svg.lit:nth-child(3) {
    animation-delay: 280ms;
}

@keyframes star-pop {
    from {
        opacity: 0;
        scale: 0.3;
        rotate: -30deg;
    }
}

.pill {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(250, 204, 21, 0.14);
    color: var(--accent) !important;
    font: 700 12px/1 var(--display);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.splash-icon svg {
    width: 56px;
    height: 56px;
    fill: rgba(56, 189, 248, 0.25);
    stroke: #7dd3fc;
}

/* ---------- Level select ---------- */

.levels-head {
    display: flex;
    align-items: center;
    gap: 12px;
}

.levels-head h2 {
    flex: 1;
}

.levels-total {
    margin: 0 !important;
    font: 700 15px/1 var(--display);
    color: var(--accent) !important;
}

.levels-note {
    font-size: 14px;
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(128px, 1fr));
    gap: 10px;
    margin-top: 16px;
}

.level-card {
    position: relative;
    display: grid;
    gap: 6px;
    padding: 10px 10px 9px;
    min-height: 92px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    text-align: left;
    cursor: pointer;
    transition: border-color 120ms ease, background-color 120ms ease, transform 120ms ease;
}

.level-card:hover,
.level-card:focus-visible {
    border-color: var(--accent);
    background: rgba(250, 204, 21, 0.08);
    transform: translateY(-2px);
    outline: none;
}

.level-card.current {
    border-color: var(--accent);
    box-shadow: inset 0 0 0 1px var(--accent);
}

.level-card[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.level-card .num {
    font: 700 22px/1 var(--display);
    color: var(--accent);
}

.level-card .name {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.2;
}

.level-card .meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: var(--muted);
}

.mini-stars {
    display: flex;
    gap: 1px;
}

.mini-stars svg {
    width: 14px;
    height: 14px;
    fill: rgba(255, 255, 255, 0.12);
    stroke: none;
}

.mini-stars svg.lit {
    fill: var(--accent);
}

.level-card .wiz {
    position: absolute;
    top: 9px;
    right: 9px;
    width: 18px;
    height: 18px;
    color: var(--violet);
}

.level-card .lock {
    position: absolute;
    top: 9px;
    right: 9px;
    width: 16px;
    height: 16px;
    color: var(--muted);
}

/* ---------- Help ---------- */

.rules {
    margin-top: 14px;
    padding-left: 20px;
    display: grid;
    gap: 8px;
    line-height: 1.45;
}

.rules b {
    color: var(--accent);
}

.keys {
    width: 100%;
    margin-top: 16px;
    border-collapse: collapse;
    font-size: 14px;
}

.keys th,
.keys td {
    padding: 7px 6px;
    border-top: 1px solid var(--line-soft);
    text-align: left;
    vertical-align: top;
}

.keys th {
    width: 34%;
    font: 600 13px/1.3 var(--display);
    color: var(--muted);
}

.help .dialog-actions {
    justify-content: flex-end;
}

.audio-opts {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--line-soft);
}

.audio-opts h3 {
    font: 600 13px/1.3 var(--display);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
}

.audio-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 22px;
    margin-top: 8px;
}

.audio-opts label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 40px;
    font-size: 14px;
    cursor: pointer;
}

.audio-opts input[type='checkbox'] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent);
    cursor: pointer;
}

.audio-opts .volume {
    flex: 1 1 220px;
    max-width: 340px;
    color: var(--muted);
}

.audio-opts input[type='range'] {
    flex: 1;
    min-width: 0;
    accent-color: var(--accent);
    cursor: pointer;
}

.audio-opts output {
    min-width: 3.2em;
    text-align: right;
    font: 600 13px/1 var(--display);
    color: var(--text);
}

.dialog .audio-muted {
    margin-top: 6px;
    font-size: 13px;
    color: var(--accent);
}

/* ---------- Narrow screens ---------- */

@media (max-width: 1100px) {
    .hud {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .toolbar {
        grid-column: 1 / -1;
        justify-self: center;
    }
}

@media (max-width: 720px) {
    .hud {
        top: max(8px, env(safe-area-inset-top));
        gap: 6px;
        grid-template-columns: minmax(0, 1fr);
    }

    .hud-level {
        padding: 6px 10px 6px 6px;
        gap: 9px;
        max-width: none;
        justify-self: stretch;
        min-height: 44px;
    }

    .lvl-badge {
        width: 34px;
        height: 34px;
        font-size: 17px;
    }

    .lvl-text h1 {
        font-size: 15px;
    }

    .tip {
        display: none;
    }

    .hud-stats {
        justify-self: stretch;
        justify-content: space-around;
        padding: 4px 0;
    }

    .stat {
        padding: 1px 8px;
    }

    .stat span {
        font-size: 9px;
    }

    .stat b {
        margin-top: 3px;
        font-size: 18px;
    }

    .toolbar {
        justify-self: stretch;
        justify-content: space-between;
        padding: 3px;
    }

    .tool {
        min-width: 0;
        flex: 1;
        height: 46px;
        padding: 0 2px;
        font-size: 9px;
    }

    .tool-icon {
        flex: 0.7;
    }

    .ai-panel {
        left: 10px;
        right: 10px;
        width: auto;
        bottom: max(10px, env(safe-area-inset-bottom));
    }

    .algos {
        gap: 4px;
    }

    .dialog {
        padding: 20px 16px;
    }

    .dialog h2 {
        font-size: 26px;
    }

    .level-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 8px;
    }

    .level-card {
        min-height: 84px;
        padding: 8px;
    }

    .banner {
        bottom: calc(max(16px, env(safe-area-inset-bottom)) + 190px);
    }
}

/* The kit's touch pad sits at the bottom; keep the banner above it. */
.gk-has-touch .banner {
    bottom: calc(max(16px, env(safe-area-inset-bottom)) + 190px);
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }
}

/* ---------- Phones ---------- */

html,
body {
    overscroll-behavior: none;
}

/* Upright phones: icon-only toolbar (labels stay as aria-label and title),
   12px labels everywhere else. */
@media (max-width: 720px) {
    .tool span {
        display: none;
    }

    .tool,
    .tool-icon {
        flex: 1;
        height: 44px;
        min-height: 44px;
    }

    .stat span,
    .ai-stats dt,
    .compare th {
        font-size: 12px;
        letter-spacing: 0.04em;
    }

    .close {
        min-width: 44px;
        min-height: 44px;
    }

    /* While the AI solves, the panel and the level card share the screen with
       the board; the stats and toolbar come back when the panel closes. */
    .ai-open .hud-stats,
    .ai-open .toolbar {
        display: none;
    }

    .ai-panel {
        max-height: min(52dvh, calc(100dvh - 140px));
        overflow-y: auto;
        overscroll-behavior: contain;
    }
}

/* Phones held sideways: one HUD row on top, touch pad and buttons at the
   sides of the board, the AI panel on the right. */
@media (orientation: landscape) and (max-height: 500px) {
    .hud {
        top: max(6px, env(safe-area-inset-top));
        display: flex;
        gap: 6px;
        align-items: stretch;
    }

    .hud-level {
        flex: 0 1 auto;
        min-width: 0;
        min-height: 44px;
        padding: 4px 10px 4px 4px;
        gap: 8px;
    }

    .lvl-badge {
        width: 34px;
        height: 34px;
        font-size: 17px;
    }

    .lvl-text h1 {
        font-size: 15px;
    }

    .tip {
        display: none;
    }

    .hud-stats {
        flex: none;
        padding: 3px 0;
    }

    .stat {
        min-width: 0;
        padding: 1px 8px;
    }

    .stat span {
        font-size: 12px;
        letter-spacing: 0.04em;
    }

    .stat b {
        margin-top: 2px;
        font-size: 18px;
    }

    .toolbar {
        flex: none;
        margin-left: auto;
        padding: 2px;
    }

    .tool {
        min-width: 40px;
        height: 44px;
        padding: 0 4px;
    }

    .tool span {
        display: none;
    }

    .ai-stats dt,
    .compare th {
        font-size: 12px;
        letter-spacing: 0.04em;
    }

    .close {
        min-width: 44px;
        min-height: 44px;
    }

    .gk-touch .gk-dpad {
        grid-template-columns: repeat(3, 48px);
        grid-template-rows: repeat(3, 48px);
    }

    .gk-touch {
        padding-bottom: max(10px, env(safe-area-inset-bottom));
    }

    .ai-panel {
        top: calc(max(6px, env(safe-area-inset-top)) + 54px);
        bottom: max(6px, env(safe-area-inset-bottom));
        left: auto;
        right: var(--gap);
        width: min(340px, 56vw);
        max-height: none;
        overflow-y: auto;
        overscroll-behavior: contain;
        padding: 10px 12px;
    }

    .algo-note {
        min-height: 0;
    }

    .banner,
    .gk-has-touch .banner {
        bottom: max(10px, env(safe-area-inset-bottom));
        max-width: calc(100vw - 2 * 190px);
    }

    .dialog {
        padding: 16px 18px;
    }

    .dialog h2 {
        font-size: 24px;
    }

    .overlay {
        padding: 8px;
    }

    .dialog {
        max-height: calc(100dvh - 16px);
    }
}