:root {
    color-scheme: light;
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-soft: #eef2f7;
    --surface-raised: #ffffff;
    --text: #172033;
    --muted: #5b6474;
    --border: #d8deea;
    --tile: #ffffff;
    --tile-text: #111827;
    --board: #dfe5ef;
    --primary: #4338ca;
    --primary-hover: #3730a3;
    --primary-soft: #e0e7ff;
    --focus: #2563eb;
    --danger: #b42318;
    --danger-soft: #fee4e2;
    --correct: #147a3f;
    --correct-shadow: #0b542a;
    --present: #9a5a06;
    --present-shadow: #6b3d03;
    --absent: #4b5563;
    --absent-shadow: #303846;
    --radius-sm: 0.6rem;
    --radius-md: 0.85rem;
    --radius-lg: 1.25rem;
    --radius-pill: 999px;
    --shadow-soft: 0 10px 28px rgb(39 49 74 / 9%);
    --shadow-tile: 0 4px 0 rgb(43 52 70 / 16%), 0 8px 18px rgb(43 52 70 / 8%);
    --board-max: 25rem;
}

body.dark-theme {
    color-scheme: dark;
    --bg: #0d1422;
    --surface: #182131;
    --surface-soft: #222d3e;
    --surface-raised: #1d2839;
    --text: #f8fafc;
    --muted: #b4bdcc;
    --border: #394559;
    --tile: #293548;
    --tile-text: #f8fafc;
    --board: #151e2d;
    --primary: #6366f1;
    --primary-hover: #818cf8;
    --primary-soft: #312e81;
    --danger: #fecaca;
    --danger-soft: #7f1d1d;
    --absent: #475569;
    --absent-shadow: #293548;
    --shadow-soft: 0 12px 32px rgb(0 0 0 / 25%);
    --shadow-tile: 0 4px 0 rgb(0 0 0 / 28%), 0 8px 18px rgb(0 0 0 / 18%);
}

body.pastel-theme {
    color-scheme: light;
    --bg: #f3e2b9;
    --surface: #faedcf;
    --surface-soft: #ead9c4;
    --surface-raised: #fbefd7;
    --text: #493746;
    --muted: #77626f;
    --border: #ddc7ae;
    --tile: #fff5df;
    --tile-text: #4b3948;
    --board: #e5d0c1;
    --primary: #805f9f;
    --primary-hover: #6d4d8b;
    --primary-soft: #eee0ef;
    --focus: #704c92;
    --danger: #a34f65;
    --danger-soft: #fae5eb;
    --correct: #36755e;
    --correct-shadow: #245340;
    --present: #9a586d;
    --present-shadow: #6f3b4c;
    --absent: #666a80;
    --absent-shadow: #46495d;
    --shadow-soft: 0 12px 30px rgb(101 76 137 / 12%);
    --shadow-tile: 0 4px 0 rgb(109 89 133 / 18%), 0 9px 20px rgb(103 79 135 / 10%);
}

body.colorblind-theme {
    --correct: #1d4ed8;
    --correct-shadow: #1e3a8a;
    --present: #9a3412;
    --present-shadow: #6c270f;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    min-width: 20rem;
    background: var(--bg);
}

body {
    margin: 0;
    min-height: 100vh;
    min-height: 100dvh;
    background:
        radial-gradient(circle at 50% -10%, rgb(99 102 241 / 11%), transparent 28rem),
        var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
    touch-action: manipulation;
    transition: background-color 300ms ease, color 220ms ease;
}

body.pastel-theme {
    background:
        radial-gradient(circle at 12% 7%, rgb(244 177 200 / 30%), transparent 19rem),
        radial-gradient(circle at 90% 22%, rgb(248 198 137 / 30%), transparent 21rem),
        radial-gradient(circle at 46% 100%, rgb(211 184 221 / 28%), transparent 24rem),
        var(--bg);
}

button, input {
    font: inherit;
}

button {
    -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
input:focus-visible + .slider,
.skip-link:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

[hidden] {
    display: none !important;
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.skip-link {
    position: fixed;
    z-index: 1000;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.65rem 0.9rem;
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    font-weight: 700;
    transform: translateY(-180%);
    transition: transform 120ms ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.app-container {
    width: min(100%, 33rem);
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0 auto;
    padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1.25rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
}

.site-header {
    display: grid;
    gap: 0.9rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid var(--border);
}

.brand-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
}

.brand-row h1 {
    margin: 0;
    font-size: clamp(1.55rem, 5vw, 1.9rem);
    line-height: 1;
    letter-spacing: -0.035em;
}

.brand-mark {
    display: grid;
    width: 2.2rem;
    height: 2.2rem;
    place-items: center;
    border-radius: 0.65rem;
    background: var(--primary);
    box-shadow: 0 3px 0 color-mix(in srgb, var(--primary), black 25%);
    color: #fff;
    font-weight: 800;
}

.header-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.45rem;
}

.header-btn {
    min-height: 2.75rem;
    padding: 0.55rem 0.45rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 700;
    box-shadow: 0 2px 8px rgb(30 41 59 / 5%);
    transition: transform 100ms ease, border-color 120ms ease, background-color 120ms ease;
}

.header-btn:hover {
    border-color: color-mix(in srgb, var(--primary), var(--border) 45%);
    background: var(--primary-soft);
}

.header-btn:active {
    transform: translateY(1px);
}

.game-shell {
    display: grid;
    gap: 0.85rem;
    padding-top: 1rem;
}

.game-info {
    text-align: center;
}

.category-card {
    position: relative;
    overflow: hidden;
    padding: 0.8rem 1rem 0.72rem;
    border: 1px solid color-mix(in srgb, var(--primary), var(--border) 68%);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, var(--surface), color-mix(in srgb, var(--primary-soft), var(--surface) 55%));
    box-shadow: var(--shadow-soft);
}

.category-card::before {
    position: absolute;
    top: 0;
    left: 15%;
    width: 70%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    content: "";
    opacity: 0.7;
}

.size-switch {
    display: inline-grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.2rem;
    margin-bottom: 0.55rem;
    padding: 0.2rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface-soft);
}

.size-btn {
    min-width: 5rem;
    min-height: 2.15rem;
    padding: 0.35rem 0.75rem;
    border: 0;
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 0.76rem;
    font-weight: 850;
    transition: background-color 140ms ease, color 140ms ease, box-shadow 140ms ease;
}

.size-btn.active {
    background: var(--surface);
    box-shadow: 0 2px 7px rgb(15 23 42 / 12%);
    color: var(--primary);
}

.size-btn:disabled {
    cursor: not-allowed;
    opacity: 0.42;
}

.category-label,
.category-title,
.game-status,
.sync-status,
.global-placeholder,
.modal-intro,
.pause-overlay p {
    margin: 0;
}

.category-label {
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 750;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.category-title {
    min-height: 2rem;
    margin-top: 0.1rem;
    font-size: clamp(1.25rem, 4.5vw, 1.55rem);
    letter-spacing: -0.025em;
}

.game-status {
    display: flex;
    min-height: 1.5rem;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    margin-top: 0.15rem;
    color: var(--muted);
    font-size: 0.78rem;
}

.game-status.is-error {
    color: var(--danger);
    font-weight: 700;
}

.text-btn {
    min-height: 2rem;
    padding: 0.2rem 0.55rem;
    border: 0;
    border-radius: var(--radius-pill);
    background: var(--primary-soft);
    color: var(--primary);
    cursor: pointer;
    font-weight: 750;
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(6.4rem, 8.5rem));
    justify-content: center;
    gap: 0.65rem;
    margin-top: 0.65rem;
}

.current-stat-box {
    padding: 0.58rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--surface), transparent 7%);
    box-shadow: 0 4px 12px rgb(15 23 42 / 6%);
}

.stat-box {
    display: flex;
    min-width: 3rem;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 1.45rem;
    font-variant-numeric: tabular-nums;
    font-weight: 800;
    line-height: 1.1;
}

.stat-label {
    margin-top: 0.15rem;
    color: var(--muted);
    font-size: 0.68rem;
    font-weight: 750;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.timer-bar {
    display: flex;
    width: min(100%, 17.65rem);
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-inline: auto;
    padding: 0.48rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface);
    box-shadow: 0 5px 14px rgb(15 23 42 / 7%);
}

.time-display {
    min-width: 3.8rem;
    font-size: 1.1rem;
    font-variant-numeric: tabular-nums;
    font-weight: 800;
    text-align: right;
}

.pill-btn {
    min-height: 2.6rem;
    padding: 0.45rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    font-weight: 750;
}

.pill-btn:hover:not(:disabled) {
    background: var(--surface-soft);
}

.pill-btn:disabled,
.primary-btn:disabled,
.secondary-btn:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.pill-btn,
.primary-btn,
.secondary-btn {
    transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease, box-shadow 140ms ease, transform 100ms ease, opacity 140ms ease;
}

.pill-btn.is-active {
    border-color: #d97706;
    background: #fef3c7;
    color: #78350f;
}

.board-container {
    position: relative;
    display: flex;
    width: 100%;
    justify-content: center;
}

.game-board {
    position: relative;
    display: grid;
    width: min(100%, var(--board-max));
    aspect-ratio: 1;
    grid-template-columns: repeat(var(--board-size, 5), 1fr);
    grid-template-rows: repeat(var(--board-size, 5), minmax(0, 1fr));
    gap: clamp(0.35rem, 1.7vw, 0.55rem);
    padding: clamp(0.5rem, 2vw, 0.7rem);
    border: 1px solid color-mix(in srgb, var(--board), var(--text) 8%);
    border-radius: var(--radius-lg);
    background: var(--board);
    box-shadow: inset 0 3px 9px rgb(15 23 42 / 12%), var(--shadow-soft);
    transition: filter 180ms ease, opacity 180ms ease;
}

.game-board.board-size-4 {
    gap: clamp(0.42rem, 2vw, 0.65rem);
    padding: clamp(0.58rem, 2.3vw, 0.8rem);
}

.game-board.board-size-4 .tile {
    font-size: clamp(1.3rem, 7vw, 1.9rem);
}

.game-board.is-loading::after,
.game-board.is-error::after {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    border-radius: inherit;
    background: color-mix(in srgb, var(--surface), transparent 15%);
    color: var(--muted);
    content: "Loading board…";
    font-size: 0.9rem;
    font-weight: 750;
}

.game-board.is-error::after {
    content: "The board could not be loaded";
}

.game-board.is-paused {
    filter: blur(9px);
    pointer-events: none;
    user-select: none;
}

.tile {
    position: relative;
    display: grid;
    min-width: 0;
    min-height: 0;
    place-items: center;
    border: 1px solid rgb(255 255 255 / 28%);
    border-radius: clamp(0.55rem, 2.5vw, 0.85rem);
    background: var(--tile);
    box-shadow: var(--shadow-tile);
    color: var(--tile-text);
    cursor: default;
    font-size: clamp(1.1rem, 6vw, 1.65rem);
    font-weight: 850;
    line-height: 1;
    user-select: none;
    transition: background-color 150ms ease, box-shadow 100ms ease, transform 100ms ease;
}

.tile:disabled {
    opacity: 1;
}

.tile.movable {
    cursor: pointer;
}

.tile.movable:hover {
    border-color: color-mix(in srgb, var(--primary), white 30%);
    box-shadow: 0 4px 0 rgb(43 52 70 / 16%), 0 0 0 3px color-mix(in srgb, var(--primary), transparent 78%);
    transform: translateY(-1px);
}

.tile.movable:active {
    box-shadow: 0 1px 0 rgb(43 52 70 / 16%);
    transform: translateY(3px);
}

.tile.empty {
    border-color: transparent;
    background: transparent;
    box-shadow: none;
}

.tile.correct,
.example-tile.correct {
    background: var(--correct);
    box-shadow: 0 4px 0 var(--correct-shadow);
    color: #fff;
}

.tile.present,
.example-tile.present {
    background: var(--present);
    box-shadow: 0 4px 0 var(--present-shadow);
    color: #fff;
}

.tile.absent,
.example-tile.absent {
    background: var(--absent);
    box-shadow: 0 3px 0 var(--absent-shadow);
    color: #fff;
}

.status-mark {
    position: absolute;
    top: 0.28rem;
    right: 0.35rem;
    font-size: clamp(0.55rem, 2vw, 0.72rem);
    font-weight: 900;
    line-height: 1;
}

.pause-overlay {
    position: absolute;
    z-index: 10;
    inset: 0;
    display: flex;
    width: min(100%, var(--board-max));
    margin: auto;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    background: color-mix(in srgb, var(--surface), transparent 7%);
    text-align: center;
}

.pause-overlay h3 {
    margin: 0;
    font-size: 1.7rem;
}

.pause-overlay p {
    max-width: 18rem;
    margin-top: 0.35rem;
    color: var(--muted);
    font-size: 0.85rem;
}

.resume-btn {
    margin-top: 1rem;
    padding-inline: 1.5rem;
}

.game-controls {
    display: grid;
    gap: 0.65rem;
}

.switch {
    position: relative;
    display: inline-block;
    width: 2.75rem;
    height: 1.6rem;
    flex: 0 0 auto;
}

.switch input {
    position: absolute;
    width: 100%;
    height: 100%;
    margin: 0;
    opacity: 0;
    cursor: pointer;
}

.slider {
    position: absolute;
    inset: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface-soft);
    pointer-events: none;
    transition: background-color 160ms ease;
}

.slider::before {
    position: absolute;
    width: 1.15rem;
    height: 1.15rem;
    top: 0.17rem;
    left: 0.18rem;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 3px rgb(15 23 42 / 35%);
    content: "";
    transition: transform 160ms ease;
}

.switch input:checked + .slider {
    border-color: var(--primary);
    background: var(--primary);
}

.switch input:checked + .slider::before {
    transform: translateX(1.1rem);
}

.switch input:disabled + .slider {
    cursor: not-allowed;
    opacity: 0.48;
}

.primary-btn,
.secondary-btn {
    min-height: 3.2rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 800;
    transition: background-color 120ms ease, transform 90ms ease, opacity 120ms ease;
}

.primary-btn {
    padding: 0.75rem 1.1rem;
    border: 1px solid transparent;
    background: var(--primary);
    box-shadow: 0 4px 0 color-mix(in srgb, var(--primary), black 26%);
    color: #fff;
}

.primary-btn:hover:not(:disabled) {
    background: var(--primary-hover);
}

.primary-btn:active:not(:disabled),
.secondary-btn:active:not(:disabled) {
    transform: translateY(2px);
}

.primary-btn.warning {
    background: var(--present);
    box-shadow: 0 4px 0 var(--present-shadow);
}

.primary-btn.danger {
    background: #b42318;
    box-shadow: 0 4px 0 #7a271a;
}

.action-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.65rem;
}

.secondary-btn {
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
}

.secondary-btn:hover:not(:disabled) {
    background: var(--surface-soft);
}

.danger-btn {
    border-color: color-mix(in srgb, var(--danger), transparent 68%);
    background: var(--danger-soft);
    color: var(--danger);
}

.full-width {
    width: 100%;
}

.sync-status {
    min-height: 1.1rem;
    color: var(--muted);
    font-size: 0.72rem;
    text-align: center;
}

.modal-overlay {
    position: fixed;
    z-index: 100;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
    background: rgb(8 15 28 / 68%);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: min(100%, 27rem);
    max-height: calc(100vh - 2rem);
    max-height: calc(100dvh - 2rem);
    overflow-y: auto;
    padding: 2rem 1.35rem 1.4rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-raised);
    box-shadow: 0 24px 70px rgb(0 0 0 / 32%);
    color: var(--text);
}

.stats-content {
    width: min(100%, 31rem);
}

.modal-content > h2 {
    margin: 0 2rem 0.8rem;
    font-size: 1.45rem;
    line-height: 1.2;
    text-align: center;
}

.modal-content hr {
    margin: 1.25rem 0;
    border: 0;
    border-top: 1px solid var(--border);
}

.close-btn {
    position: absolute;
    top: 0.55rem;
    right: 0.55rem;
    display: grid;
    width: 2.75rem;
    height: 2.75rem;
    place-items: center;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 1.65rem;
    line-height: 1;
}

.close-btn:hover {
    background: var(--surface-soft);
    color: var(--text);
}

.modal-intro {
    color: var(--muted);
    font-size: 0.9rem;
    text-align: left;
}

.instruction-list {
    display: grid;
    gap: 0.45rem;
    margin: 0.85rem 0 0;
    padding-left: 1.2rem;
    color: var(--muted);
    font-size: 0.86rem;
}

.instruction-list strong {
    color: var(--text);
}

.tutorial-section {
    margin-top: 0.9rem;
}

.tutorial-section h3,
.tutorial-section p,
.tutorial-tip {
    margin: 0;
}

.tutorial-section h3 {
    font-size: 0.9rem;
}

.tutorial-section p,
.tutorial-tip {
    margin-top: 0.22rem;
    color: var(--muted);
    font-size: 0.82rem;
}

.tutorial-tip {
    margin-top: 0.85rem;
}

.tutorial-tip strong {
    color: var(--text);
}

.tutorial-examples {
    display: grid;
    gap: 0.55rem;
    margin-top: 1rem;
    padding: 0.8rem;
    border-radius: var(--radius-md);
    background: var(--surface-soft);
}

.tutorial-row {
    display: grid;
    grid-template-columns: 2.35rem 1fr;
    align-items: center;
    gap: 0.7rem;
    font-size: 0.8rem;
}

.example-tile {
    position: relative;
    display: grid;
    width: 2.35rem;
    height: 2.35rem;
    place-items: center;
    border-radius: 0.5rem;
    font-weight: 850;
}

.example-tile > span {
    position: absolute;
    top: 0.16rem;
    right: 0.22rem;
    font-size: 0.48rem;
}

.modal-action {
    width: 100%;
    margin-top: 1.1rem;
}

.settings-list {
    display: grid;
    gap: 0.8rem;
}

.setting-item {
    display: flex;
    min-height: 3.5rem;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    font-weight: 700;
}

.setting-item small {
    display: block;
    margin-top: 0.12rem;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 500;
}

.privacy-note {
    padding: 0.85rem;
    border-radius: var(--radius-md);
    background: var(--surface-soft);
}

.privacy-note h3,
.privacy-note p {
    margin: 0;
}

.privacy-note h3 {
    font-size: 0.88rem;
}

.privacy-note p {
    margin-top: 0.25rem;
    color: var(--muted);
    font-size: 0.75rem;
}

.score-section {
    text-align: center;
}

.score-section h3,
.section-heading {
    margin: 0;
    font-size: 1rem;
    text-align: center;
}

.badges-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.45rem;
    margin: 0.55rem 0 0.9rem;
}

.badge {
    padding: 0.28rem 0.65rem;
    border-radius: var(--radius-pill);
    font-size: 0.7rem;
    font-weight: 850;
}

.badge-pending {
    border: 1px solid var(--border);
    background: var(--surface-soft);
    color: var(--muted);
}

.performance-cards {
    display: grid;
    gap: 0.6rem;
}

.perf-card {
    padding: 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: linear-gradient(145deg, var(--surface), var(--surface-soft));
}

.perf-card h3 {
    margin: 0;
}

.perf-card h3 {
    font-size: 0.82rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.perf-card-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.standing-pill {
    display: grid;
    justify-items: end;
    gap: 0.08rem;
    min-width: 7.4rem;
    padding: 0.36rem 0.65rem;
    border: 1px solid color-mix(in srgb, var(--primary), var(--border) 45%);
    border-radius: var(--radius-pill);
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 0.76rem;
    font-weight: 800;
    line-height: 1.2;
    text-align: right;
}

.standing-pill > span:last-child {
    color: color-mix(in srgb, var(--primary), var(--text) 35%);
    font-size: 0.68rem;
    font-weight: 850;
}

body.dark-theme .standing-pill {
    border-color: #777bf8;
    background: #353783;
    color: #ffffff;
}

body.dark-theme .standing-pill > span:last-child {
    color: #d9dbff;
}

.comparison-list {
    display: grid;
    gap: 0.45rem;
    margin-top: 0.7rem;
}

.comparison-row {
    display: grid;
    grid-template-columns: minmax(7.15rem, auto) minmax(3rem, 1fr);
    align-items: center;
    gap: 0.55rem;
}

.comparison-label {
    display: grid;
    grid-template-columns: 4.15rem 2.7rem;
    align-items: baseline;
    gap: 0.3rem;
    color: var(--muted);
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
}

.comparison-label strong {
    color: var(--text);
    font-size: 0.8rem;
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.comparison-track {
    position: relative;
    display: block;
    height: 0.52rem;
    overflow: hidden;
    border-radius: var(--radius-pill);
    background: color-mix(in srgb, var(--border), transparent 25%);
}

.comparison-track {
    min-width: 0;
}

.comparison-fill {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: color-mix(in srgb, var(--muted), transparent 15%);
    transition: width 420ms cubic-bezier(.2,.8,.2,1);
}

.comparison-fill.is-you {
    background: linear-gradient(90deg, var(--primary), color-mix(in srgb, var(--primary), white 24%));
}

.global-placeholder {
    margin-top: 0.75rem;
    color: var(--muted);
    font-size: 0.75rem;
    text-align: center;
}

.ranking-note {
    margin: 0.7rem 0 0;
    color: var(--muted);
    font-size: 0.72rem;
    text-align: center;
}

.stats-section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.stats-section-heading h3 {
    margin: 0;
    font-size: 1rem;
}

.section-chip {
    padding: 0.26rem 0.58rem;
    border-radius: var(--radius-pill);
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 0.7rem;
    font-weight: 850;
}

.community-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.45rem;
    margin-top: 0.8rem;
}

.community-stat {
    display: grid;
    min-width: 0;
    gap: 0.1rem;
    padding: 0.68rem 0.25rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
    text-align: center;
}

.community-stat.accent {
    border-color: color-mix(in srgb, var(--primary), var(--border) 52%);
    background: var(--primary-soft);
}

.community-stat span {
    overflow: hidden;
    font-size: 1.08rem;
    font-variant-numeric: tabular-nums;
    font-weight: 850;
    text-overflow: ellipsis;
}

.community-stat small,
.community-averages small {
    color: var(--muted);
    font-size: 0.6rem;
    font-weight: 750;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.player-identity {
    position: relative;
    display: flex;
    min-width: 0;
    align-items: center;
    justify-content: space-between;
    gap: 0.85rem;
    overflow: hidden;
    padding: 0.9rem;
    border: 1px solid color-mix(in srgb, var(--primary), var(--border) 52%);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-soft), var(--surface));
}

.player-identity::after {
    position: absolute;
    top: -2rem;
    right: -1.5rem;
    width: 6rem;
    height: 6rem;
    border-radius: 50%;
    background: color-mix(in srgb, var(--primary), transparent 90%);
    content: "";
    pointer-events: none;
}

.player-identity-copy {
    position: relative;
    z-index: 1;
    display: grid;
    min-width: 0;
    gap: 0.12rem;
}

.identity-eyebrow {
    color: var(--primary);
    font-size: 0.61rem;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.player-identity-copy strong {
    overflow: hidden;
    font-size: 1.05rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.player-identity-copy small {
    color: var(--muted);
    font-size: 0.67rem;
    line-height: 1.35;
}

.identity-reroll-btn {
    position: relative;
    z-index: 1;
    flex: 0 0 auto;
    min-height: 2.45rem;
    padding-inline: 0.72rem;
    font-size: 0.7rem;
}

.tutorial-content {
    width: min(100%, 43rem);
    padding-inline: clamp(1.1rem, 4vw, 2rem);
}

.tutorial-lead {
    max-width: 36rem;
    margin-inline: auto;
    text-align: center;
}

.tutorial-lead strong {
    color: var(--text);
}

.tutorial-flow {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.55rem;
    margin: 1rem 0 0;
    padding: 0;
    list-style: none;
}

.tutorial-flow li {
    display: grid;
    grid-template-columns: 1.8rem 1fr;
    align-items: start;
    gap: 0.55rem;
    padding: 0.72rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: linear-gradient(145deg, var(--surface), var(--surface-soft));
}

.tutorial-flow li > span {
    display: grid;
    width: 1.8rem;
    height: 1.8rem;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 900;
}

.tutorial-flow li > div {
    display: grid;
    gap: 0.1rem;
}

.tutorial-flow strong {
    font-size: 0.78rem;
}

.tutorial-flow small {
    color: var(--muted);
    font-size: 0.68rem;
    line-height: 1.4;
}

.tutorial-demo-section {
    margin-top: 1rem;
    padding: 0.9rem;
    border: 1px solid color-mix(in srgb, var(--primary), var(--border) 64%);
    border-radius: var(--radius-lg);
    background: color-mix(in srgb, var(--primary-soft), var(--surface) 65%);
}

.tutorial-section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.tutorial-section-heading > div {
    display: grid;
    gap: 0.05rem;
}

.tutorial-section-heading span {
    color: var(--muted);
    font-size: 0.61rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.tutorial-section-heading h3 {
    font-size: 1.05rem;
}

.tutorial-demo-chip {
    padding: 0.28rem 0.55rem;
    border-radius: var(--radius-pill);
    background: var(--surface);
    color: var(--primary) !important;
    letter-spacing: 0 !important;
}

.tutorial-demo-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.tutorial-figure {
    margin: 0;
    padding: 0.7rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
}

.tutorial-figure figcaption {
    display: grid;
    gap: 0.08rem;
    margin-bottom: 0.55rem;
}

.tutorial-figure figcaption strong {
    font-size: 0.78rem;
}

.tutorial-figure figcaption span {
    min-height: 2rem;
    color: var(--muted);
    font-size: 0.63rem;
    line-height: 1.35;
}

.tutorial-mini-board {
    display: grid;
    aspect-ratio: 1;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: repeat(4, minmax(0, 1fr));
    gap: 0.24rem;
    padding: 0.35rem;
    border-radius: 0.75rem;
    background: var(--board);
    box-shadow: inset 0 2px 6px rgb(15 23 42 / 12%);
}

.demo-tile {
    position: relative;
    display: grid;
    min-width: 0;
    place-items: center;
    border-radius: 0.42rem;
    color: #fff;
    font-size: clamp(0.72rem, 3.5vw, 1rem);
    font-weight: 900;
    line-height: 1;
}

.demo-tile.correct { background: var(--correct); box-shadow: 0 2px 0 var(--correct-shadow); }
.demo-tile.present { background: var(--present); box-shadow: 0 2px 0 var(--present-shadow); }
.demo-tile.absent { background: var(--absent); box-shadow: 0 2px 0 var(--absent-shadow); }
.demo-tile.blank { background: transparent; box-shadow: none; }

.demo-tile:not(.blank)::after {
    position: absolute;
    top: 0.18rem;
    right: 0.22rem;
    font-size: 0.42rem;
    line-height: 1;
}

.demo-tile.correct::after { content: "✓"; }
.demo-tile.present::after { content: "●"; }
.demo-tile.absent::after { content: "×"; }

.tutorial-key {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-top: 0.8rem;
}

.tutorial-key > div {
    display: grid;
    grid-template-columns: 2.35rem 1fr;
    align-items: center;
    gap: 0.55rem;
    padding: 0.55rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
}

.tutorial-key p,
.tutorial-key strong,
.tutorial-key small,
.tutorial-reminder p,
.tutorial-final-notes p {
    margin: 0;
}

.tutorial-key p {
    display: grid;
    gap: 0.06rem;
}

.tutorial-key strong {
    font-size: 0.7rem;
}

.tutorial-key small {
    color: var(--muted);
    font-size: 0.59rem;
    line-height: 1.35;
}

.tutorial-reminder {
    margin-top: 0.8rem;
    padding: 0.75rem 0.85rem;
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-sm);
    background: var(--primary-soft);
}

.tutorial-reminder strong {
    font-size: 0.78rem;
}

.tutorial-reminder p {
    margin-top: 0.18rem;
    color: var(--muted);
    font-size: 0.69rem;
}

.tutorial-final-notes {
    display: grid;
    gap: 0.4rem;
    margin-top: 0.8rem;
}

.tutorial-final-notes p {
    padding: 0.55rem 0.65rem;
    border-radius: var(--radius-sm);
    background: color-mix(in srgb, var(--surface-soft), transparent 25%);
    color: var(--muted);
    font-size: 0.69rem;
}

.tutorial-final-notes strong {
    color: var(--text);
}

.community-outcomes {
    margin-top: 0.7rem;
}

.outcome-track {
    display: flex;
    height: 0.68rem;
    overflow: hidden;
    border-radius: var(--radius-pill);
    background: var(--surface-soft);
    box-shadow: inset 0 0 0 1px var(--border);
}

.outcome-segment {
    width: 0;
    height: 100%;
    transition: width 420ms cubic-bezier(.2,.8,.2,1);
}

.outcome-segment.is-solved,
.outcome-legend i.is-solved {
    background: color-mix(in srgb, var(--correct), white 12%);
}

.outcome-segment.is-revealed,
.outcome-legend i.is-revealed {
    background: color-mix(in srgb, var(--present), white 12%);
}

.outcome-segment.is-progress,
.outcome-legend i.is-progress {
    background: color-mix(in srgb, var(--primary), white 15%);
}

.outcome-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 0.75rem;
    margin-top: 0.4rem;
    color: var(--muted);
    font-size: 0.61rem;
    font-weight: 700;
}

.outcome-legend span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.outcome-legend i {
    width: 0.48rem;
    height: 0.48rem;
    border-radius: 50%;
}

.community-totals {
    display: grid;
    gap: 0.42rem;
    margin-top: 0.65rem;
}

.community-totals > div {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.46rem 0.65rem;
    border-radius: var(--radius-sm);
    background: var(--surface-soft);
    color: var(--muted);
    font-size: 0.73rem;
}

.community-totals strong {
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.community-averages {
    margin-top: 0.7rem;
    padding: 0.75rem;
    border: 1px solid color-mix(in srgb, var(--primary), var(--border) 65%);
    border-radius: var(--radius-md);
    background: linear-gradient(145deg, var(--surface), var(--primary-soft));
}

.community-averages h4 {
    margin: 0 0 0.55rem;
    font-size: 0.77rem;
}

.community-averages > div {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.community-averages > div > span {
    display: grid;
    gap: 0.05rem;
    text-align: center;
}

.community-averages strong {
    font-size: 1rem;
    font-variant-numeric: tabular-nums;
}

.share-btn {
    width: 100%;
    margin-top: 0.9rem;
}

.modal-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.4rem;
    margin-top: 0.8rem;
}

.size-lifetime-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem;
    margin-top: 0.7rem;
}

.size-lifetime-grid article {
    display: grid;
    gap: 0.12rem;
    padding: 0.72rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
}

.size-lifetime-grid article > span {
    color: var(--primary);
    font-size: 0.7rem;
    font-weight: 850;
}

.size-lifetime-grid article strong {
    font-size: 0.88rem;
}

.size-lifetime-grid article small {
    color: var(--muted);
    font-size: 0.63rem;
}

.leaderboard-panel {
    margin-top: 0.75rem;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
}

.leaderboard-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.leaderboard-heading > div {
    display: grid;
    gap: 0.02rem;
}

.leaderboard-heading span:first-child {
    color: var(--muted);
    font-size: 0.58rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.leaderboard-heading h4 {
    margin: 0;
    font-size: 0.86rem;
}

.leaderboard-chip {
    padding: 0.22rem 0.5rem;
    border-radius: var(--radius-pill);
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 0.62rem;
    font-weight: 850;
}

.leaderboard-list {
    display: grid;
    gap: 0.35rem;
    margin: 0.65rem 0 0;
    padding: 0;
    list-style: none;
}

.leaderboard-row {
    display: grid;
    grid-template-columns: 1.65rem minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.5rem;
    border-radius: var(--radius-sm);
    background: var(--surface);
}

.leaderboard-row.is-you {
    box-shadow: inset 3px 0 0 var(--primary);
    background: var(--primary-soft);
}

.leaderboard-rank {
    color: var(--primary);
    font-size: 0.72rem;
    font-weight: 900;
    text-align: center;
}

.leaderboard-name {
    overflow: hidden;
    font-size: 0.73rem;
    font-weight: 780;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.leaderboard-score {
    display: grid;
    gap: 0;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.leaderboard-score strong {
    color: var(--text);
    font-size: 0.75rem;
}

.leaderboard-score small {
    font-size: 0.56rem;
    white-space: nowrap;
}

.leaderboard-empty {
    margin: 0.65rem 0 0;
    color: var(--muted);
    font-size: 0.7rem;
    text-align: center;
}

.history-launch-btn {
    display: flex;
    width: 100%;
    min-height: 4.25rem;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 0.9rem;
    padding: 0.75rem 0.9rem;
    border: 1px solid color-mix(in srgb, var(--primary), var(--border) 38%);
    border-radius: var(--radius-md);
    background: linear-gradient(130deg, var(--primary), color-mix(in srgb, var(--primary), #8b5cf6 42%));
    box-shadow: 0 5px 0 color-mix(in srgb, var(--primary), black 28%), 0 12px 24px rgb(67 56 202 / 18%);
    color: #fff;
    cursor: pointer;
    text-align: left;
}

.history-launch-btn > span:first-child {
    display: grid;
    gap: 0.12rem;
}

.history-launch-btn strong {
    font-size: 0.95rem;
}

.history-launch-btn small {
    color: rgb(255 255 255 / 80%);
    font-size: 0.68rem;
}

.history-launch-icon {
    display: grid;
    width: 2rem;
    height: 2rem;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 50%;
    background: rgb(255 255 255 / 17%);
    font-size: 1.15rem;
}

.history-launch-btn:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
}

.lifetime-visuals {
    display: grid;
    gap: 0.9rem;
    margin-top: 0.9rem;
    padding: 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
}

.solve-rate-meter {
    display: grid;
    gap: 0.4rem;
}

.solve-rate-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
}

.solve-rate-heading span {
    color: var(--muted);
    font-size: 0.68rem;
    font-weight: 750;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.solve-rate-heading strong {
    font-size: 1.15rem;
    font-variant-numeric: tabular-nums;
}

.solve-rate-track {
    display: block;
    height: 0.78rem;
    overflow: hidden;
    border-radius: var(--radius-pill);
    background: color-mix(in srgb, var(--border), transparent 15%);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary), transparent 82%);
}

.solve-rate-fill {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), color-mix(in srgb, var(--primary), white 28%));
    transition: width 420ms cubic-bezier(.2,.8,.2,1);
}

.solve-rate-caption {
    color: var(--muted);
    font-size: 0.62rem;
}

.lifetime-insights {
    display: grid;
    gap: 0.65rem;
}

.streak-visual {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.75rem;
}

.streak-gem {
    color: var(--present);
    font-size: 1.1rem;
}

.archive-content {
    display: flex;
    flex-direction: column;
}

.archive-groups {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.archive-size-section {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: color-mix(in srgb, var(--surface-soft), transparent 35%);
}

.archive-size-section.size-4 {
    border-top: 3px solid var(--primary);
}

.archive-size-section.size-5 {
    border-top: 3px solid color-mix(in srgb, var(--present), var(--primary) 20%);
}

.archive-size-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.72rem 0.8rem 0.62rem;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--surface), transparent 18%);
}

.archive-size-heading h3 {
    margin: 0;
    font-size: 0.9rem;
}

.archive-size-heading span {
    color: var(--muted);
    font-size: 0.65rem;
    font-weight: 750;
}

.archive-list {
    display: grid;
    gap: 0.6rem;
    margin: 0;
    padding: 0.65rem;
}

.archive-item {
    position: relative;
    overflow: hidden;
    display: grid;
    min-height: 3.8rem;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
    color: var(--text);
    cursor: pointer;
    text-align: left;
}

.archive-item::after {
    position: absolute;
    right: -0.2rem;
    bottom: -1rem;
    color: var(--text);
    content: "";
    font-size: 4rem;
    font-weight: 900;
    line-height: 1;
    opacity: 0.045;
    pointer-events: none;
}

.archive-item.is-solved {
    border-color: color-mix(in srgb, var(--correct), var(--border) 50%);
    background: linear-gradient(115deg, color-mix(in srgb, var(--correct), transparent 88%), var(--surface-soft));
}

.archive-item.is-solved::after {
    color: var(--correct);
    content: "✓";
    opacity: 0.1;
}

.archive-item.is-progress {
    border-color: color-mix(in srgb, var(--primary), var(--border) 58%);
    background: linear-gradient(115deg, color-mix(in srgb, var(--primary), transparent 91%), var(--surface-soft));
}

.archive-item.is-progress::after {
    color: var(--primary);
    content: "…";
    opacity: 0.09;
}

.archive-item.is-revealed {
    border-color: color-mix(in srgb, var(--present), var(--border) 58%);
    background: linear-gradient(115deg, color-mix(in srgb, var(--present), transparent 91%), var(--surface-soft));
}

.archive-item.is-revealed::after {
    color: var(--present);
    content: "◇";
    opacity: 0.09;
}

.archive-item:hover {
    border-color: var(--primary);
}

.archive-item.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary), transparent 75%);
}

.archive-info {
    display: flex;
    min-width: 0;
    flex-direction: column;
}

.archive-date {
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 700;
}

.archive-theme {
    display: -webkit-box;
    overflow: hidden;
    font-size: 0.9rem;
    font-weight: 800;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    text-overflow: ellipsis;
    white-space: normal;
}

.archive-status {
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-pill);
    background: var(--surface);
    color: var(--muted);
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
}

.archive-item.is-solved .archive-status {
    background: color-mix(in srgb, var(--correct), transparent 86%);
    color: color-mix(in srgb, var(--correct), var(--text) 25%);
}

.archive-item.is-progress .archive-status {
    background: color-mix(in srgb, var(--primary), transparent 87%);
    color: var(--primary);
}

.archive-item.is-revealed .archive-status {
    background: color-mix(in srgb, var(--present), transparent 86%);
    color: color-mix(in srgb, var(--present), var(--text) 28%);
}

.archive-empty {
    margin: 0;
    padding: 0.8rem;
    color: var(--muted);
    font-size: 0.76rem;
    text-align: center;
}

.history-content {
    width: min(100%, 32rem);
}

.history-intro {
    text-align: center;
}

.history-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.45rem;
    margin-top: 0.9rem;
}

.history-summary > div {
    display: grid;
    min-width: 0;
    gap: 0.08rem;
    padding: 0.65rem 0.25rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
    text-align: center;
}

.history-summary strong {
    overflow: hidden;
    font-size: 1rem;
    font-variant-numeric: tabular-nums;
    text-overflow: ellipsis;
}

.history-summary span {
    color: var(--muted);
    font-size: 0.58rem;
    font-weight: 750;
    text-transform: uppercase;
}

.history-filters {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.25rem;
    margin-top: 0.75rem;
    padding: 0.22rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface-soft);
}

.history-filter {
    min-height: 2.1rem;
    border: 0;
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 800;
}

.history-filter.active {
    background: var(--surface);
    box-shadow: 0 2px 7px rgb(15 23 42 / 11%);
    color: var(--primary);
}

.history-list {
    display: grid;
    gap: 0.7rem;
    margin-top: 0.8rem;
}

.history-card {
    position: relative;
    overflow: hidden;
    padding: 0.8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
}

.history-card.is-solved {
    border-left: 4px solid var(--correct);
    background: linear-gradient(120deg, color-mix(in srgb, var(--correct), transparent 91%), var(--surface-soft) 58%);
}

.history-card.is-progress {
    border-left: 4px solid var(--primary);
    background: linear-gradient(120deg, color-mix(in srgb, var(--primary), transparent 92%), var(--surface-soft) 58%);
}

.history-card.is-revealed {
    border-left: 4px solid var(--present);
    background: linear-gradient(120deg, color-mix(in srgb, var(--present), transparent 92%), var(--surface-soft) 58%);
}

.history-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.7rem;
}

.history-card-header > div {
    display: grid;
    min-width: 0;
    gap: 0.08rem;
}

.history-card-header > div span {
    color: var(--muted);
    font-size: 0.63rem;
    font-weight: 700;
}

.history-card-header > div strong {
    overflow: hidden;
    font-size: 0.9rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-status {
    flex: 0 0 auto;
    padding: 0.22rem 0.48rem;
    border-radius: var(--radius-pill);
    background: var(--surface);
    color: var(--muted);
    font-size: 0.6rem;
    font-weight: 850;
    text-transform: uppercase;
}

.history-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.35rem;
    margin-top: 0.65rem;
}

.history-metrics > span {
    display: grid;
    gap: 0.05rem;
    padding: 0.42rem;
    border-radius: var(--radius-sm);
    background: color-mix(in srgb, var(--surface), transparent 12%);
    text-align: center;
}

.history-metrics small {
    color: var(--muted);
    font-size: 0.55rem;
    font-weight: 750;
    text-transform: uppercase;
}

.history-metrics strong {
    font-size: 0.8rem;
    font-variant-numeric: tabular-nums;
}

.history-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    margin-top: 0.6rem;
    color: var(--muted);
    font-size: 0.59rem;
}

.history-open-btn {
    min-height: 1.85rem;
    flex: 0 0 auto;
    padding: 0.25rem 0.55rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface);
    color: var(--primary);
    cursor: pointer;
    font-size: 0.62rem;
    font-weight: 800;
}

.history-empty {
    display: grid;
    gap: 0.25rem;
    padding: 1.25rem;
    border: 1px dashed var(--border);
    border-radius: var(--radius-md);
    color: var(--muted);
    font-size: 0.75rem;
    text-align: center;
}

.history-empty strong {
    color: var(--text);
    font-size: 0.88rem;
}

/* Soft visual polish and lightweight motion */
.app-container {
    position: relative;
    z-index: 1;
}

.brand-mark {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.brand-mark::after {
    position: absolute;
    inset: -35%;
    background: linear-gradient(115deg, transparent 35%, rgb(255 255 255 / 46%) 50%, transparent 65%);
    content: "";
    transform: translateX(-90%) rotate(8deg);
    transition: transform 520ms cubic-bezier(.2,.8,.2,1);
}

.brand-row:hover .brand-mark::after {
    transform: translateX(90%) rotate(8deg);
}

.header-btn {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    box-shadow: 0 4px 12px rgb(30 41 59 / 6%);
}

.header-btn::before {
    display: grid;
    width: 1.35rem;
    height: 1.35rem;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 0.42rem;
    background: var(--primary-soft);
    color: var(--primary);
    content: "";
    font-size: 0.7rem;
    font-weight: 900;
    transition: transform 180ms cubic-bezier(.2,.8,.2,1);
}

#help-btn::before { content: "?"; }
#archive-btn::before { content: "▦"; }
#settings-btn::before {
    color: var(--primary);
    content: "\2699\FE0E";
    font-family: "Segoe UI Symbol", sans-serif;
    font-size: 0.78rem;
    -webkit-text-fill-color: var(--primary);
}
#stats-btn::before { content: "↗"; }

.header-btn:hover {
    box-shadow: 0 8px 20px color-mix(in srgb, var(--primary), transparent 88%);
    transform: translateY(-2px);
}

.header-btn:hover::before {
    transform: rotate(-5deg) scale(1.08);
}

.game-shell > * {
    animation: soft-rise 440ms cubic-bezier(.2,.8,.2,1) both;
}

.game-shell > :nth-child(2) { animation-delay: 50ms; }
.game-shell > :nth-child(3) { animation-delay: 90ms; }
.game-shell > :nth-child(4) { animation-delay: 130ms; }
.game-shell > :nth-child(5) { animation-delay: 160ms; }

.category-card,
.current-stat-box,
.timer-bar,
.perf-card,
.community-stat,
.size-lifetime-grid article,
.history-summary > div {
    transition: border-color 180ms ease, box-shadow 200ms ease, transform 180ms cubic-bezier(.2,.8,.2,1), background-color 180ms ease;
}

.category-card:hover,
.current-stat-box:hover,
.timer-bar:hover {
    border-color: color-mix(in srgb, var(--primary), var(--border) 50%);
    box-shadow: 0 12px 26px color-mix(in srgb, var(--primary), transparent 89%);
    transform: translateY(-1px);
}

.board-container::before {
    position: absolute;
    inset: 5% 2% -3%;
    z-index: -1;
    border-radius: 2rem;
    background: radial-gradient(ellipse, color-mix(in srgb, var(--primary), transparent 82%), transparent 70%);
    content: "";
    opacity: 0.5;
    transform: scale(0.96);
    transition: opacity 280ms ease, transform 280ms ease;
}

.board-container:hover::before {
    opacity: 0.72;
    transform: scale(1);
}

.game-board.board-arriving .tile {
    animation: tile-arrive 260ms cubic-bezier(.2,.8,.2,1) both;
    animation-delay: min(calc(var(--tile-index) * 4ms), 90ms);
}

.primary-btn:hover:not(:disabled):not(:active),
.secondary-btn:hover:not(:disabled):not(:active),
.pill-btn:hover:not(:disabled):not(:active),
.history-launch-btn:hover,
.history-open-btn:hover {
    transform: translateY(-2px);
}

.modal-overlay {
    animation: overlay-in 180ms ease-out both;
}

.modal-content {
    animation: modal-in 280ms cubic-bezier(.2,.8,.2,1) both;
}

.close-btn {
    transition: background-color 140ms ease, color 140ms ease, transform 180ms cubic-bezier(.2,.8,.2,1);
}

.close-btn:hover {
    transform: rotate(6deg) scale(1.06);
}

.archive-item,
.history-card {
    transition: border-color 160ms ease, box-shadow 180ms ease, transform 180ms cubic-bezier(.2,.8,.2,1), background-color 180ms ease;
}

.archive-item:hover,
.history-card:hover {
    box-shadow: 0 9px 22px color-mix(in srgb, var(--primary), transparent 90%);
    transform: translateY(-2px);
}

.theme-picker {
    min-width: 0;
    margin: 0;
    padding: 0 0 0.9rem;
    border: 0;
    border-bottom: 1px solid var(--border);
}

.theme-picker legend {
    margin-bottom: 0.55rem;
    padding: 0;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.theme-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.theme-option {
    position: relative;
    min-width: 0;
    cursor: pointer;
}

.theme-option input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
}

.theme-option-card {
    display: grid;
    min-height: 6.7rem;
    align-content: start;
    gap: 0.12rem;
    padding: 0.48rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
    color: var(--text);
    text-align: center;
    transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms cubic-bezier(.2,.8,.2,1), background-color 180ms ease;
}

.theme-option:hover .theme-option-card {
    border-color: color-mix(in srgb, var(--primary), var(--border) 45%);
    transform: translateY(-2px);
}

.theme-option input:focus-visible + .theme-option-card {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

.theme-option input:checked + .theme-option-card {
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary-soft), var(--surface) 35%);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary), transparent 77%), 0 8px 18px color-mix(in srgb, var(--primary), transparent 90%);
}

.theme-option-card strong {
    font-size: 0.74rem;
}

.theme-option-card small {
    color: var(--muted);
    font-size: 0.58rem;
    line-height: 1.25;
}

.theme-preview {
    position: relative;
    overflow: hidden;
    display: flex;
    height: 3.05rem;
    align-items: flex-end;
    justify-content: center;
    gap: 0.2rem;
    margin-bottom: 0.24rem;
    padding: 0.42rem;
    border-radius: 0.62rem;
    background: #f4f6fb;
}

.theme-preview::before {
    position: absolute;
    top: 0.4rem;
    left: 0.45rem;
    width: 42%;
    height: 0.28rem;
    border-radius: var(--radius-pill);
    background: currentColor;
    content: "";
    opacity: 0.72;
}

.theme-preview i {
    width: 0.8rem;
    height: 1.15rem;
    border-radius: 0.25rem;
    background: #fff;
    box-shadow: 0 2px 4px rgb(30 41 59 / 14%);
}

.preview-light { color: #4338ca; }
.preview-light i:nth-child(2) { background: #147a3f; }
.preview-light i:nth-child(3) { background: #9a5a06; }
.preview-dark { background: #202a3b; color: #818cf8; }
.preview-dark i { background: #344156; }
.preview-dark i:nth-child(2) { background: #147a3f; }
.preview-dark i:nth-child(3) { background: #9a5a06; }
.preview-pastel {
    background: linear-gradient(145deg, #f9dfdf, #eee0ed 52%, #f4e2ce);
    color: #805f9f;
}
.preview-pastel i { background: #fff9fd; }
.preview-pastel i:nth-child(2) { background: #8dc8b3; }
.preview-pastel i:nth-child(3) { background: #dfa6b8; }

body.pastel-theme::before,
body.pastel-theme::after {
    position: fixed;
    z-index: 0;
    width: 17rem;
    height: 17rem;
    border-radius: 50%;
    content: "";
    opacity: 0.34;
    pointer-events: none;
    will-change: transform;
}

body.pastel-theme::before {
    top: 8%;
    left: -10rem;
    background: radial-gradient(circle at 65% 40%, #ffd6e5, transparent 68%);
    animation: pastel-float-a 16s ease-in-out infinite alternate;
}

body.pastel-theme::after {
    right: -9rem;
    bottom: 4%;
    background: radial-gradient(circle at 35% 45%, #f4d4b8, transparent 68%);
    animation: pastel-float-b 19s ease-in-out infinite alternate;
}

body.pastel-theme .brand-mark {
    background: linear-gradient(145deg, #8064c3, #a477b4);
    animation: pastel-brand-float 4.8s ease-in-out infinite;
}

body.pastel-theme .category-card {
    background: linear-gradient(140deg, rgb(251 239 215 / 96%), rgb(240 219 227 / 90%) 56%, rgb(232 227 199 / 90%));
}

body.pastel-theme .category-card::before {
    height: 3px;
    background: linear-gradient(90deg, transparent, #d78eaa, #8d73c7, #6da995, transparent);
    background-size: 180% 100%;
    animation: pastel-shimmer 7s ease-in-out infinite;
}

body.pastel-theme .modal-content {
    box-shadow: 0 28px 75px rgb(74 55 103 / 25%);
}

body.pastel-theme #settings-overlay .modal-content {
    background:
        radial-gradient(circle at 8% 5%, rgb(255 214 229 / 45%), transparent 10rem),
        radial-gradient(circle at 92% 95%, rgb(249 218 184 / 48%), transparent 12rem),
        var(--surface-raised);
}

body.pastel-theme .tile.movable:hover {
    box-shadow: 0 4px 0 rgb(109 89 133 / 18%), 0 0 0 3px rgb(152 119 188 / 20%), 0 10px 22px rgb(113 88 143 / 13%);
}

@keyframes soft-rise {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes overlay-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modal-in {
    from { opacity: 0; transform: translateY(10px) scale(0.985); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes tile-arrive {
    from { opacity: 0.72; transform: translateY(3px) scale(0.985); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes pastel-float-a {
    to { transform: translate3d(3rem, 1.5rem, 0) scale(1.08); }
}

@keyframes pastel-float-b {
    to { transform: translate3d(-2.5rem, -1.25rem, 0) scale(1.1); }
}

@keyframes pastel-brand-float {
    0%, 100% { transform: translateY(0) rotate(0); }
    50% { transform: translateY(-2px) rotate(-1deg); }
}

@keyframes pastel-shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.toast {
    position: fixed;
    z-index: 1000;
    top: max(1rem, env(safe-area-inset-top));
    left: 50%;
    width: max-content;
    max-width: calc(100vw - 2rem);
    padding: 0.7rem 1rem;
    border: 1px solid color-mix(in srgb, var(--text), transparent 70%);
    border-radius: var(--radius-pill);
    background: var(--text);
    box-shadow: 0 10px 30px rgb(0 0 0 / 25%);
    color: var(--bg);
    font-size: 0.82rem;
    font-weight: 750;
    pointer-events: none;
    text-align: center;
    transform: translateX(-50%);
}

body.modal-open .toast {
    visibility: hidden;
}

.noscript-message {
    position: fixed;
    inset: 1rem;
    z-index: 2000;
    display: grid;
    place-items: center;
    margin: 0;
    border-radius: var(--radius-lg);
    background: var(--surface);
    color: var(--text);
    font-weight: 800;
}

@media (max-width: 27rem) {
    .app-container {
        padding-inline: 0.75rem;
    }

    .game-shell {
        gap: 0.7rem;
    }

    .header-btn {
        min-height: 2.65rem;
        padding-inline: 0.25rem;
        font-size: 0.7rem;
    }

    .modal-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
    }

    .lifetime-visuals {
        padding: 0.75rem;
    }

    .community-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .history-summary {
        grid-template-columns: repeat(2, 1fr);
    }

    .player-identity {
        align-items: stretch;
        flex-direction: column;
    }

    .identity-reroll-btn {
        width: 100%;
    }

    .leaderboard-row {
        grid-template-columns: 1.65rem minmax(0, 1fr);
    }

    .leaderboard-score {
        grid-column: 2;
        text-align: left;
    }

    .tutorial-flow,
    .tutorial-demo-grid,
    .tutorial-key {
        grid-template-columns: 1fr;
    }

    #tutorial-overlay {
        align-items: stretch;
        padding: max(0.5rem, env(safe-area-inset-top)) max(0.5rem, env(safe-area-inset-right)) max(0.5rem, env(safe-area-inset-bottom)) max(0.5rem, env(safe-area-inset-left));
    }

    .tutorial-content {
        max-height: calc(100vh - 1rem);
        max-height: calc(100dvh - 1rem);
        padding: 1.65rem 0.85rem 1rem;
        border-radius: 1.15rem;
    }

    .tutorial-content > h2 {
        margin-bottom: 0.65rem;
        font-size: 1.35rem;
    }

    .tutorial-lead {
        font-size: 0.84rem;
        line-height: 1.5;
        text-align: left;
    }

    .tutorial-flow {
        gap: 0.45rem;
        margin-top: 0.8rem;
    }

    .tutorial-flow li {
        padding: 0.68rem;
    }

    .tutorial-flow small {
        font-size: 0.7rem;
    }

    .tutorial-demo-section {
        padding: 0.7rem;
    }

    .tutorial-section-heading {
        align-items: flex-start;
    }

    .tutorial-demo-grid {
        gap: 0.6rem;
        margin-top: 0.65rem;
    }

    .tutorial-figure {
        display: grid;
        grid-template-columns: minmax(5.5rem, 0.75fr) minmax(8.5rem, 1.25fr);
        align-items: center;
        gap: 0.65rem;
        padding: 0.65rem;
    }

    .tutorial-figure figcaption {
        margin-bottom: 0;
    }

    .tutorial-figure figcaption span {
        min-height: 0;
    }

    .tutorial-key > div {
        grid-template-columns: 2.35rem 1fr;
        padding: 0.65rem;
    }

    .tutorial-key strong {
        font-size: 0.75rem;
    }

    .tutorial-key small,
    .tutorial-reminder p,
    .tutorial-final-notes p {
        font-size: 0.68rem;
        line-height: 1.45;
    }
}

@media (max-width: 22rem) {
    .perf-card {
        padding-inline: 0.72rem;
    }

    .comparison-row {
        grid-template-columns: 6.7rem minmax(2.5rem, 1fr);
        gap: 0.42rem;
    }

    .comparison-label {
        grid-template-columns: 3.85rem 2.55rem;
    }

    .header-buttons {
        grid-template-columns: repeat(2, 1fr);
    }

    .action-row {
        grid-template-columns: 1fr;
    }

    .size-lifetime-grid {
        grid-template-columns: 1fr;
    }

    .tutorial-figure {
        grid-template-columns: 1fr;
    }

    .tutorial-mini-board {
        width: min(100%, 12rem);
        margin-inline: auto;
    }
}

@media (max-height: 42rem) and (orientation: landscape) {
    .modal-overlay {
        align-items: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

/* Board-first focus canvas ------------------------------------------------- */

html,
body {
    overflow-x: clip;
}

.app-container {
    width: min(100%, 92rem);
    padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1.5rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
}

.site-header {
    position: relative;
    z-index: 20;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding: 0;
    border: 0;
    pointer-events: none;
}

.brand-row,
.header-buttons {
    pointer-events: auto;
}

.brand-row {
    justify-content: flex-start;
    min-height: 3.35rem;
    padding: 0.55rem 0.75rem;
    border: 1px solid color-mix(in srgb, var(--border), transparent 12%);
    border-radius: 1rem;
    background: color-mix(in srgb, var(--surface), transparent 4%);
    box-shadow: 0 12px 32px rgb(39 49 74 / 10%);
    backdrop-filter: blur(12px);
}

.brand-row h1 {
    font-size: 1.35rem;
}

.brand-logo {
    display: block;
    width: clamp(7.8rem, 12vw, 10rem);
    height: 2.2rem;
    object-fit: contain;
}

.brand-mark {
    width: 2rem;
    height: 2rem;
    border-radius: 0.58rem;
}

.header-buttons {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.38rem;
    border: 1px solid color-mix(in srgb, var(--border), transparent 12%);
    border-radius: 1rem;
    background: color-mix(in srgb, var(--surface), transparent 4%);
    box-shadow: 0 12px 32px rgb(39 49 74 / 10%);
    backdrop-filter: blur(12px);
}

.header-btn {
    width: 3.1rem;
    min-height: 3rem;
    padding: 0.45rem;
    overflow: hidden;
    border-color: transparent;
    box-shadow: none;
    font-size: 0;
    white-space: nowrap;
    transition: width 220ms cubic-bezier(.2,.8,.2,1), background-color 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.header-btn::before {
    width: 1.75rem;
    height: 1.75rem;
    margin: 0;
}

.header-btn:hover,
.header-btn:focus-visible {
    width: 7.75rem;
    border-color: color-mix(in srgb, var(--primary), var(--border) 70%);
    font-size: 0.72rem;
}

.game-shell {
    position: relative;
    display: grid;
    width: min(100%, 61rem);
    min-height: calc(100dvh - 6.2rem);
    grid-template-columns: minmax(7.5rem, 9rem) minmax(20rem, 36rem) minmax(7.5rem, 9rem);
    grid-template-rows: auto auto auto;
    align-content: center;
    justify-content: center;
    column-gap: clamp(1rem, 3vw, 2.5rem);
    row-gap: 0.85rem;
    margin: -2.25rem auto 0;
    padding: 4.5rem 0 1rem;
}

.game-info {
    display: contents;
}

.category-card {
    grid-column: 2;
    grid-row: 1;
    min-width: 0;
    padding: 0.72rem 11rem 0.68rem 1rem;
    overflow: visible;
    border-color: color-mix(in srgb, var(--border), transparent 12%);
    border-radius: var(--radius-pill);
    background: color-mix(in srgb, var(--surface), transparent 5%);
    box-shadow: 0 10px 30px rgb(39 49 74 / 8%);
    backdrop-filter: blur(12px);
    text-align: left;
}

.category-card::before {
    display: none;
}

.category-label {
    font-size: 0.62rem;
}

.category-title {
    min-height: 0;
    margin-top: 0;
    overflow: hidden;
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.2;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.game-status {
    min-height: 0;
    justify-content: flex-start;
    margin-top: 0.12rem;
    font-size: 0.68rem;
}

.size-switch {
    z-index: 2;
    grid-column: 2;
    grid-row: 1;
    align-self: center;
    justify-self: end;
    margin: 0 0.5rem 0 0;
    background: var(--surface-soft);
}

.size-btn {
    min-width: 4.35rem;
}

.stats-row {
    grid-column: 1;
    grid-row: 2;
    align-self: start;
    justify-content: stretch;
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin: clamp(2.25rem, 7vh, 5rem) 0 0;
}

.current-stat-box {
    min-height: 6.15rem;
    justify-content: center;
    border-radius: 50%;
    background:
        radial-gradient(circle at 50% 50%, var(--surface) 57%, transparent 59%),
        conic-gradient(var(--primary) 0 22%, var(--surface-soft) 22% 100%);
    box-shadow: 0 12px 28px rgb(39 49 74 / 10%);
}

.current-stat-box:hover {
    transform: translateY(-2px) scale(1.015);
}

.stat-value {
    font-size: 1.55rem;
}

.timer-bar {
    grid-column: 1;
    grid-row: 2;
    align-self: end;
    width: 100%;
    min-height: 6.5rem;
    margin: 0 0 clamp(1.25rem, 4vh, 3rem);
    flex-direction: column;
    gap: 0.25rem;
    border-radius: 50%;
    background:
        radial-gradient(circle at 50% 50%, var(--surface) 57%, transparent 59%),
        conic-gradient(var(--primary) 0 34%, var(--surface-soft) 34% 100%);
}

.time-display {
    min-width: 0;
    font-size: 1.12rem;
    text-align: center;
}

.board-container {
    grid-column: 2;
    grid-row: 2;
    align-self: center;
}

.game-board {
    --board-max: 36rem;
    border-color: color-mix(in srgb, var(--primary), var(--border) 82%);
    border-radius: 1.65rem;
    box-shadow: inset 0 3px 10px rgb(15 23 42 / 11%), 0 24px 60px rgb(39 49 74 / 14%);
}

.board-container::before {
    inset: -6%;
    border-radius: 35%;
    background: radial-gradient(circle, color-mix(in srgb, var(--primary), transparent 80%), transparent 66%);
}

.game-controls {
    grid-column: 2;
    grid-row: 3;
    width: min(100%, 27rem);
    justify-self: center;
    gap: 0.35rem;
}

.primary-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    gap: 0.55rem;
}

.primary-actions #pause-btn {
    min-height: 3.25rem;
    border-color: color-mix(in srgb, var(--primary), var(--border) 62%);
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 0.86rem;
    font-weight: 850;
}

.primary-actions #pause-btn:hover:not(:disabled) {
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary-soft), var(--surface) 28%);
}

.game-controls .primary-btn {
    min-height: 3.25rem;
    border-radius: var(--radius-pill);
    box-shadow: 0 8px 24px color-mix(in srgb, var(--primary), transparent 72%);
}

.game-controls .action-row {
    display: flex;
    justify-content: center;
}

.game-controls .danger-btn {
    min-height: 2rem;
    padding: 0.2rem 0.75rem;
    border-color: transparent;
    background: transparent;
    box-shadow: none;
    font-size: 0.72rem;
}

.sync-status {
    min-height: 0.8rem;
}

.site-footer {
    display: flex;
    width: min(100%, 61rem);
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin: 0 auto;
    margin-top: 0.9rem;
    padding: 1rem 1.15rem;
    border: 1px solid color-mix(in srgb, var(--border), transparent 8%);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    background: color-mix(in srgb, var(--surface), var(--surface-soft) 35%);
    box-shadow: 0 -10px 30px rgb(15 23 42 / 4%);
    color: var(--muted);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text);
}

.footer-brand .brand-mark {
    width: 1.65rem;
    height: 1.65rem;
    border-radius: 0.48rem;
    font-size: 0.72rem;
}

.footer-brand strong {
    font-size: 0.88rem;
}

.footer-logo {
    display: block;
    width: 5.4rem;
    height: 1.4rem;
    object-fit: contain;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

.footer-link {
    min-height: 2.5rem;
    padding: 0.35rem 0.75rem;
    border: 0;
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 750;
    text-decoration: underline;
    text-underline-offset: 0.18rem;
}

.footer-link:hover,
.footer-link:focus-visible {
    background: var(--surface-soft);
    color: var(--primary);
}

.stats-tabs {
    display: grid;
    width: min(100%, 34rem);
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.3rem;
    margin: 0 auto 0.9rem;
    padding: 0.3rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface-soft);
}

.stats-tab {
    min-height: 2.65rem;
    padding: 0.45rem 0.8rem;
    border: 0;
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font: inherit;
    font-size: 0.78rem;
    font-weight: 850;
}

.stats-tab:hover {
    color: var(--text);
}

.stats-tab.active {
    background: var(--surface);
    box-shadow: 0 3px 12px rgb(15 23 42 / 10%);
    color: var(--primary);
}

/* Clearly separated personal, aggregate, and leaderboard statistics. */
.current-puzzle-section,
.global-stats-layout,
#modal-overlay .personal-section {
    width: min(100%, 74rem);
    margin-inline: auto;
}

.current-puzzle-section,
.stats-group-panel {
    padding: 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: color-mix(in srgb, var(--surface-soft), transparent 30%);
}

.current-puzzle-section {
    border-color: color-mix(in srgb, var(--primary), var(--border) 62%);
    box-shadow: inset 4px 0 0 var(--primary);
}

.stats-group-heading {
    display: grid;
    gap: 0.05rem;
    margin-bottom: 0.72rem;
}

.stats-group-heading.with-chip {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
}

.stats-group-heading.with-chip > div {
    display: grid;
    gap: 0.05rem;
}

.stats-group-heading > span,
.stats-group-heading > div > span {
    color: var(--primary);
    font-size: 0.6rem;
    font-weight: 850;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.stats-group-heading h3 {
    margin: 0;
    font-size: 1.03rem;
}

.current-game-placeholder {
    margin: 0;
    padding: 0.7rem;
    border: 1px dashed var(--border);
    border-radius: var(--radius-md);
    color: var(--muted);
    font-size: 0.76rem;
    text-align: center;
}

.current-puzzle-section:has(.performance-cards:not([hidden])) .current-game-placeholder {
    display: none;
}

.global-stats-layout {
    display: grid;
    grid-template-columns: minmax(18rem, 0.72fr) minmax(0, 1.28fr);
    align-items: start;
    gap: 0.85rem;
}

.community-section.stats-group-panel {
    border-top: 3px solid color-mix(in srgb, var(--primary), var(--border) 35%);
}

.global-leaderboard-section {
    border-top: 3px solid color-mix(in srgb, #d5a021, var(--border) 35%);
}

.global-leaderboard-section .leaderboard-panel {
    margin-top: 0;
}

.overall-user-section {
    margin-top: 0.9rem;
    padding: 1rem;
    border: 1px solid color-mix(in srgb, var(--primary), var(--border) 76%);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, color-mix(in srgb, var(--surface-soft), transparent 16%), var(--surface));
    box-shadow: inset 0 3px 0 color-mix(in srgb, var(--primary), transparent 38%);
}

.metric-leaderboards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.65rem;
    margin-top: 0.7rem;
}

.metric-symbol {
    display: grid;
    width: 1.8rem;
    height: 1.8rem;
    place-items: center;
    border-radius: 0.55rem;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 900;
}

.leaderboard-status {
    margin: -0.25rem 0 0;
    color: var(--muted);
    font-size: 0.68rem;
}

.global-scope-switch {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.25rem;
    margin-bottom: 0.7rem;
    padding: 0.25rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface);
}

.global-scope-btn {
    min-height: 2.1rem;
    padding: 0.3rem 0.45rem;
    border: 0;
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font: inherit;
    font-size: 0.67rem;
    font-weight: 820;
}

.global-scope-btn.active {
    background: var(--primary-soft);
    color: var(--primary);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary), transparent 68%);
}

.selected-puzzle-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.65rem;
    margin-bottom: 0.55rem;
    padding: 0.7rem;
    border: 1px solid color-mix(in srgb, #d5a021, var(--border) 48%);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, color-mix(in srgb, #fff2bd, var(--surface) 76%), var(--surface));
}

.selected-puzzle-card > span:first-child {
    padding: 0.32rem 0.48rem;
    border-radius: 0.55rem;
    background: color-mix(in srgb, #d5a021, transparent 82%);
    color: color-mix(in srgb, #8a5d00, var(--text) 18%);
    font-size: 0.68rem;
    font-weight: 900;
    white-space: nowrap;
}

.selected-puzzle-card > div {
    display: grid;
    min-width: 0;
    gap: 0.08rem;
}

.selected-puzzle-card strong,
.selected-puzzle-card small {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.selected-puzzle-card strong {
    font-size: 0.78rem;
}

.selected-puzzle-card small {
    color: var(--muted);
    font-size: 0.6rem;
}

.live-stats-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: #17824f;
    font-size: 0.6rem;
    font-weight: 850;
}

.live-stats-indicator i {
    width: 0.42rem;
    height: 0.42rem;
    border-radius: 50%;
    background: #28a96b;
    box-shadow: 0 0 0 0 rgb(40 169 107 / 36%);
    animation: live-stats-pulse 2.4s ease-out infinite;
}

@keyframes live-stats-pulse {
    50% { box-shadow: 0 0 0 0.28rem rgb(40 169 107 / 0%); }
}

@media (prefers-reduced-motion: reduce) {
    .live-stats-indicator i { animation: none; }
}

.metric-leaderboards .leaderboard-panel {
    min-width: 0;
    padding: 0.65rem;
}

.metric-leaderboards .leaderboard-row {
    grid-template-columns: 1.5rem minmax(5.5rem, 1fr);
}

.metric-leaderboards .leaderboard-score {
    grid-column: 2;
    width: 100%;
    grid-template-columns: auto 1fr;
    align-items: baseline;
    gap: 0.45rem;
    text-align: left;
}

.metric-leaderboards .leaderboard-score small {
    overflow: hidden;
    text-align: right;
    text-overflow: ellipsis;
}

/* Bottom statistics and history drawers; archive enters from the left. */
#modal-overlay,
#history-overlay {
    align-items: flex-end;
    padding: 3.5rem 0 0;
    background: rgb(8 15 28 / 40%);
}

#modal-overlay .modal-content,
#history-overlay .modal-content {
    width: 100%;
    max-width: none;
    max-height: min(76dvh, 49rem);
    padding: 2rem clamp(1rem, 4vw, 4rem) 1.5rem;
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 1.6rem 1.6rem 0 0;
    animation-name: focus-drawer-in;
}

#modal-overlay .modal-content::before,
#history-overlay .modal-content::before {
    position: absolute;
    top: 0.55rem;
    left: 50%;
    width: 3.25rem;
    height: 0.3rem;
    border-radius: var(--radius-pill);
    background: var(--border);
    content: "";
    transform: translateX(-50%);
}

#modal-overlay .performance-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

#archive-overlay {
    align-items: stretch;
    justify-content: flex-start;
    padding: 0;
    background: rgb(8 15 28 / 38%);
}

#archive-overlay .archive-content {
    width: min(91vw, 25rem);
    max-height: 100dvh;
    padding: max(2.5rem, env(safe-area-inset-top)) 1.1rem max(1rem, env(safe-area-inset-bottom));
    border-top: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 0 1.5rem 1.5rem 0;
    animation-name: focus-archive-in;
}

@keyframes focus-drawer-in {
    from { opacity: 0; transform: translateY(3rem); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes focus-archive-in {
    from { opacity: 0; transform: translateX(-2rem); }
    to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 47.99rem) {
    .app-container {
        width: 100%;
        padding: max(0.65rem, env(safe-area-inset-top)) max(0.65rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(0.65rem, env(safe-area-inset-left));
    }

    .site-header {
        position: sticky;
        top: max(0.5rem, env(safe-area-inset-top));
        align-items: center;
    }

    .brand-row {
        min-height: 2.8rem;
        padding: 0.38rem 0.55rem;
        border-radius: 0.85rem;
    }

    .brand-row h1 {
        font-size: 1.05rem;
    }

    .brand-logo {
        width: 6.7rem;
        height: 1.75rem;
    }

    .brand-mark {
        width: 1.75rem;
        height: 1.75rem;
        font-size: 0.78rem;
    }

    .header-buttons {
        gap: 0.15rem;
        padding: 0.25rem;
        border-radius: 0.85rem;
    }

    .header-btn,
    .header-btn:hover,
    .header-btn:focus-visible {
        width: 2.65rem;
        min-height: 2.65rem;
        padding: 0.25rem;
        font-size: 0;
        transform: none;
    }

    .header-btn::before {
        width: 1.7rem;
        height: 1.7rem;
    }

    .game-shell {
        display: grid;
        width: 100%;
        min-height: 0;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: auto auto auto auto auto;
        gap: 0.62rem;
        margin: 0;
        padding: 0.85rem 0 0;
    }

    .site-footer {
        flex-direction: column;
        margin-top: 0.75rem;
        padding: 0.85rem;
        border-radius: 1rem 1rem 0 0;
    }

    .footer-links {
        width: 100%;
        justify-content: center;
        border-top: 1px solid var(--border);
        padding-top: 0.45rem;
    }

    .game-info {
        display: contents;
    }

    .category-card {
        grid-column: 1;
        grid-row: 1;
        min-height: 3.65rem;
        padding: 0.62rem 8.8rem 0.58rem 0.78rem;
        border-radius: 1rem;
    }

    .category-label {
        font-size: 0.55rem;
    }

    .category-title {
        font-size: clamp(0.92rem, 4.5vw, 1.1rem);
    }

    .game-status {
        font-size: 0.61rem;
        line-height: 1.2;
    }

    .size-switch {
        grid-column: 1;
        grid-row: 1;
        margin-right: 0.4rem;
        padding: 0.15rem;
    }

    .size-btn {
        min-width: 3.55rem;
        min-height: 1.9rem;
        padding: 0.25rem 0.5rem;
        font-size: 0.66rem;
    }

    .board-container {
        grid-column: 1;
        grid-row: 2;
        z-index: 1;
    }

    .game-board {
        --board-max: 35rem;
        border-radius: 1.35rem;
    }

    .stats-row {
        z-index: 4;
        grid-column: 1;
        grid-row: 3;
        display: grid;
        width: calc(100% - 1rem);
        grid-template-columns: repeat(2, 1fr);
        gap: 0;
        margin: 0.25rem auto 0;
        padding: 0.48rem 0.25rem;
        border: 1px solid color-mix(in srgb, var(--border), transparent 10%);
        border-radius: var(--radius-pill);
        background: color-mix(in srgb, var(--surface), transparent 5%);
        box-shadow: 0 12px 30px rgb(39 49 74 / 14%);
        backdrop-filter: blur(14px);
    }

    .current-stat-box {
        min-height: 2.7rem;
        padding: 0.2rem;
        border: 0;
        border-right: 1px solid var(--border);
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }

    .current-stat-box:last-child {
        border-right: 0;
    }

    .stat-value {
        font-size: 1rem;
    }

    .stat-label {
        margin-top: 0;
        font-size: 0.54rem;
    }

    .timer-bar {
        z-index: 5;
        grid-column: 1;
        grid-row: 3;
        align-self: center;
        justify-self: center;
        width: 32%;
        min-height: 2.7rem;
        margin: 0.25rem 0 0;
        padding: 0.18rem;
        border: 0;
        border-radius: 0;
        background: var(--surface);
        box-shadow: none;
    }

    .time-display {
        font-size: 0.92rem;
    }

    .stats-row .current-stat-box:first-child {
        padding-right: 34%;
    }

    .stats-row .current-stat-box:last-child {
        padding-left: 34%;
    }

    .game-controls {
        position: relative;
        z-index: 12;
        bottom: auto;
        grid-column: 1;
        grid-row: 4;
        width: 100%;
        padding: 0.5rem;
        border: 1px solid color-mix(in srgb, var(--border), transparent 8%);
        border-radius: 1rem;
        background: color-mix(in srgb, var(--surface), transparent 4%);
        box-shadow: 0 12px 34px rgb(39 49 74 / 16%);
        backdrop-filter: blur(14px);
    }

    .primary-actions {
        grid-template-columns: minmax(5.5rem, 1fr) minmax(0, 2fr);
    }

    .primary-actions #pause-btn,
    .game-controls .primary-btn {
        min-height: 3.05rem;
    }

    .game-controls .primary-btn {
        min-height: 2.9rem;
    }

    #modal-overlay,
    #history-overlay {
        padding-top: 5rem;
    }

    #modal-overlay .modal-content,
    #history-overlay .modal-content {
        max-height: calc(100dvh - 5rem);
        padding: 1.8rem 0.8rem max(1rem, env(safe-area-inset-bottom));
        border-radius: 1.25rem 1.25rem 0 0;
    }

    #modal-overlay .performance-cards {
        grid-template-columns: 1fr;
    }

    .current-puzzle-section,
    .stats-group-panel {
        padding: 0.75rem;
        border-radius: 1rem;
    }

    .global-stats-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .metric-leaderboards {
        grid-template-columns: minmax(0, 1fr);
    }

    .stats-tabs {
        position: sticky;
        z-index: 3;
        top: -0.2rem;
        margin-bottom: 0.75rem;
        box-shadow: 0 5px 14px color-mix(in srgb, var(--background), transparent 20%);
    }

    #archive-overlay {
        align-items: flex-end;
    }

    #archive-overlay .archive-content {
        width: 100%;
        max-height: calc(100dvh - 4rem);
        padding: 1.8rem 0.8rem max(1rem, env(safe-area-inset-bottom));
        border: 1px solid var(--border);
        border-bottom: 0;
        border-radius: 1.25rem 1.25rem 0 0;
        animation-name: focus-drawer-in;
    }
}

@media (max-width: 25rem) {
    .header-buttons {
        gap: 0;
    }

    .header-btn,
    .header-btn:hover,
    .header-btn:focus-visible {
        width: 2.3rem;
    }

    .category-card {
        padding-right: 7.4rem;
    }

    .size-btn {
        min-width: 2.9rem;
    }
}