.g2-shell {
    width: min(100%, 600px);
    margin: 0 auto;
    padding: 8px 0 28px;
    color: var(--cg-ink);
    font-family: Inter, Arial, sans-serif;
}

.g2-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.g2-scores,
.g2-tools,
.g2-controls,
.g2-tabs,
.g2-banner-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.g2-scores {
    flex: 1 1 auto;
    min-width: 0;
}

.g2-score-card {
    position: relative;
    flex: 1 1 0;
    min-width: 0;
    padding: 8px 12px;
    border: 1px solid var(--cg-line);
    border-radius: 8px;
    background: var(--cg-panel);
    box-shadow: var(--cg-shadow);
}

.g2-score-card span,
.g2-stat span {
    display: block;
    margin-bottom: 2px;
    color: var(--cg-muted);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.g2-score-card strong {
    display: block;
    color: var(--cg-ink);
    font-size: 1.3rem;
    line-height: 1.1;
}

.g2-button,
.g2-icon-button,
.g2-tab,
.g2-chip {
    min-height: 44px;
    border: 1px solid var(--cg-line);
    border-radius: 8px;
    background: var(--cg-panel);
    color: var(--cg-ink);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    transition: transform 120ms ease, border-color 120ms ease, background 120ms ease, opacity 120ms ease;
}

.g2-button {
    padding: 0 14px;
}

.g2-button-wide {
    flex: 1 1 0;
}

.g2-icon-button {
    display: inline-grid;
    width: 44px;
    flex: 0 0 44px;
    place-items: center;
    padding: 0;
    font-size: 1rem;
}

.g2-icon-button svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.g2-button:hover:not(:disabled),
.g2-icon-button:hover:not(:disabled),
.g2-tab:hover,
.g2-chip:hover {
    transform: translateY(-1px);
    border-color: var(--cg-teal);
}

.g2-button:active:not(:disabled),
.g2-icon-button:active:not(:disabled) {
    transform: translateY(0);
}

.g2-button:disabled,
.g2-icon-button:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

.g2-button-primary {
    border-color: var(--cg-green);
    background: var(--cg-green);
    color: #fff;
}

.g2-button-warn {
    border-color: var(--cg-red);
    background: var(--cg-red);
    color: #fff;
}

.g2-button:focus-visible,
.g2-icon-button:focus-visible,
.g2-tab:focus-visible,
.g2-chip:focus-visible,
.g2-board:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--cg-teal) 45%, transparent);
    outline-offset: 3px;
}

.g2-status {
    min-height: 20px;
    margin: 0 0 10px;
    color: var(--cg-muted);
    font-size: 0.85rem;
    text-align: center;
}

.g2-board-wrap {
    position: relative;
    width: min(100%, 600px);
    margin: 0 auto;
}

.g2-board {
    --g2-gap: clamp(8px, 2.6vw, 14px);
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border: 1px solid color-mix(in srgb, var(--cg-line) 75%, var(--cg-ink));
    border-radius: 10px;
    background: color-mix(in srgb, var(--cg-line) 80%, var(--cg-amber));
    box-shadow: var(--cg-shadow);
    overflow: hidden;
    touch-action: none;
}

.g2-grid {
    position: absolute;
    inset: 0;
    display: grid;
    gap: var(--g2-gap);
    padding: var(--g2-gap);
}

.g2-cell {
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.42);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.g2-tiles {
    position: absolute;
    inset: 0;
    font-weight: 900;
    pointer-events: none;
}

.g2-tile {
    position: absolute;
    display: grid;
    place-items: center;
    border-radius: 6px;
    color: #fff;
    font-size: 1em;
    line-height: 1;
    transform: translate(
        calc(var(--g2-gap) + (var(--g2-x) * (100% + var(--g2-gap)))),
        calc(var(--g2-gap) + (var(--g2-y) * (100% + var(--g2-gap))))
    );
    transition: transform 150ms ease, opacity 150ms ease;
    will-change: transform;
    z-index: 2;
}

.g2-board[data-n="3"] .g2-grid {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
}

.g2-board[data-n="3"] .g2-tile {
    width: calc((100% - (var(--g2-gap) * 4)) / 3);
    height: calc((100% - (var(--g2-gap) * 4)) / 3);
}

.g2-board[data-n="3"] .g2-tiles {
    font-size: clamp(1.9rem, 11vw, 3.1rem);
}

.g2-board[data-n="4"] .g2-grid {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
}

.g2-board[data-n="4"] .g2-tile {
    width: calc((100% - (var(--g2-gap) * 5)) / 4);
    height: calc((100% - (var(--g2-gap) * 5)) / 4);
}

.g2-board[data-n="4"] .g2-tiles {
    font-size: clamp(1.45rem, 8vw, 2.4rem);
}

.g2-board[data-n="5"] .g2-grid {
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(5, 1fr);
}

.g2-board[data-n="5"] .g2-tile {
    width: calc((100% - (var(--g2-gap) * 6)) / 5);
    height: calc((100% - (var(--g2-gap) * 6)) / 5);
}

.g2-board[data-n="5"] .g2-tiles {
    font-size: clamp(1.1rem, 6.2vw, 1.9rem);
}

.g2-board[data-n="6"] {
    --g2-gap: clamp(5px, 1.9vw, 10px);
}

.g2-board[data-n="6"] .g2-grid {
    grid-template-columns: repeat(6, 1fr);
    grid-template-rows: repeat(6, 1fr);
}

.g2-board[data-n="6"] .g2-tile {
    width: calc((100% - (var(--g2-gap) * 7)) / 6);
    height: calc((100% - (var(--g2-gap) * 7)) / 6);
}

.g2-board[data-n="6"] .g2-tiles {
    font-size: clamp(0.9rem, 5vw, 1.6rem);
}

.g2-tile-large {
    font-size: 0.72em;
}

.g2-tile-huge {
    font-size: 0.56em;
}

.g2-tile-new {
    animation: g2-appear 150ms ease 110ms both;
}

.g2-tile-merged {
    animation: g2-pop 180ms ease 110ms both;
    z-index: 4;
}

.g2-tile-ghost {
    opacity: 0;
    z-index: 3;
}

.g2-tile-2 {
    background: #edf0df;
    color: var(--cg-ink);
}

.g2-tile-4 {
    background: #e7dec8;
    color: var(--cg-ink);
}

.g2-tile-8 {
    background: #d99a3b;
}

.g2-tile-16 {
    background: var(--cg-amber);
}

.g2-tile-32 {
    background: #c95f35;
}

.g2-tile-64 {
    background: var(--cg-red);
}

.g2-tile-128 {
    background: #3f7d76;
}

.g2-tile-256 {
    background: var(--cg-teal);
}

.g2-tile-512 {
    background: var(--cg-blue);
}

.g2-tile-1024 {
    background: #8d5b9f;
}

.g2-tile-2048 {
    background: #d4a21f;
    color: #fff;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.32), 0 0 28px rgba(196, 122, 23, 0.55);
}

.g2-tile-super {
    background: var(--cg-ink);
}

.g2-score-pop {
    position: absolute;
    top: 6px;
    right: 8px;
    color: var(--cg-green);
    font-size: 0.9rem;
    font-style: normal;
    font-weight: 900;
    opacity: 0;
    transform: translateY(4px);
    pointer-events: none;
}

.g2-score-pop-on {
    animation: g2-score-rise 520ms ease both;
}

.g2-banner {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 16px;
    border-radius: 10px;
    background: rgba(246, 247, 242, 0.82);
    backdrop-filter: blur(3px);
    z-index: 8;
}

.g2-banner-panel {
    width: min(100%, 340px);
    padding: 18px;
    border: 1px solid var(--cg-line);
    border-radius: 10px;
    background: var(--cg-panel);
    box-shadow: var(--cg-shadow);
    text-align: center;
}

.g2-banner-panel h2 {
    margin: 0 0 6px;
    color: var(--cg-ink);
    font-size: 1.35rem;
    line-height: 1.15;
}

.g2-banner-panel p {
    margin: 0 0 14px;
    color: var(--cg-muted);
    font-size: 0.92rem;
    line-height: 1.4;
}

.g2-banner-actions {
    justify-content: center;
    flex-wrap: wrap;
}

.g2-controls {
    margin: 12px auto 0;
    width: min(100%, 600px);
}

.g2-tabs {
    margin: 8px auto 0;
    width: min(100%, 600px);
    flex-wrap: wrap;
}

.g2-tab {
    flex: 1 1 0;
    min-width: 68px;
    padding: 0 8px;
    color: var(--cg-muted);
    font-size: 0.92rem;
}

.g2-tab-on {
    border-color: var(--cg-ink);
    background: var(--cg-ink);
    color: #fff;
}

.g2-tabs-size .g2-tab {
    font-size: 0.88rem;
}

.g2-tab-cycle {
    display: none;
}

.g2-summary {
    margin: 14px auto 0;
    width: min(100%, 600px);
    padding: 14px 16px 16px;
    border: 1px solid var(--cg-line);
    border-radius: 10px;
    background: var(--cg-panel);
    box-shadow: var(--cg-shadow);
}

.g2-sub {
    margin: 0 0 10px;
    color: var(--cg-ink);
    font-size: 0.95rem;
}

.g2-summary .g2-sub + .g2-stat-grid + .g2-stat-grid,
.g2-summary .g2-stat-grid + .g2-sub {
    margin-top: 14px;
}

.g2-stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
}

.g2-stat {
    padding: 8px 10px;
    border: 1px solid var(--cg-line);
    border-radius: 8px;
    background: color-mix(in srgb, var(--cg-bg) 60%, var(--cg-panel));
}

.g2-stat strong {
    display: block;
    color: var(--cg-ink);
    font-size: 1.05rem;
    line-height: 1.15;
}

.g2-hist {
    display: grid;
    gap: 5px;
}

.g2-hist-row {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    align-items: center;
    gap: 8px;
}

.g2-hist-row span {
    color: var(--cg-muted);
    font-size: 0.78rem;
    font-weight: 800;
    text-align: right;
}

.g2-hist-row i {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 5px;
    background: color-mix(in srgb, var(--cg-line) 70%, var(--cg-panel));
    color: var(--cg-muted);
    font-size: 0.78rem;
    font-style: normal;
    font-weight: 800;
    text-align: right;
}

.g2-hist-row-on i {
    background: var(--cg-green);
    color: #fff;
}

.g2-sheet {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(30, 37, 40, 0.32);
    z-index: 30;
}

.g2-sheet-panel {
    width: min(100%, 420px);
    max-height: 86vh;
    overflow-y: auto;
    padding: 18px;
    border: 1px solid var(--cg-line);
    border-radius: 10px;
    background: var(--cg-panel);
    box-shadow: var(--cg-shadow);
}

.g2-sheet-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.g2-sheet-head h2 {
    margin: 0;
    color: var(--cg-ink);
    font-size: 1.25rem;
}

.g2-sheet-panel p {
    margin: 0 0 12px;
    color: var(--cg-muted);
    font-size: 0.92rem;
    line-height: 1.45;
}

.g2-sheet-panel .g2-button-wide {
    display: block;
    width: 100%;
    margin-top: 14px;
}

.g2-archive-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.g2-archive-nav strong {
    flex: 1 1 auto;
    color: var(--cg-ink);
    font-size: 0.95rem;
    text-align: center;
}

.g2-archive-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
}

.g2-chip {
    display: grid;
    place-items: center;
    padding: 4px;
    color: var(--cg-muted);
    font-size: 0.85rem;
}

.g2-chip i {
    display: block;
    color: var(--cg-green);
    font-size: 0.68rem;
    font-style: normal;
}

.g2-chip-on {
    border-color: var(--cg-teal);
    background: color-mix(in srgb, var(--cg-teal) 12%, var(--cg-panel));
    color: var(--cg-ink);
}

#game-root [hidden] {
    display: none !important;
}

@keyframes g2-appear {
    0% {
        opacity: 0;
        transform: translate(
            calc(var(--g2-gap) + (var(--g2-x) * (100% + var(--g2-gap)))),
            calc(var(--g2-gap) + (var(--g2-y) * (100% + var(--g2-gap))))
        ) scale(0.68);
    }
    100% {
        opacity: 1;
        transform: translate(
            calc(var(--g2-gap) + (var(--g2-x) * (100% + var(--g2-gap)))),
            calc(var(--g2-gap) + (var(--g2-y) * (100% + var(--g2-gap))))
        ) scale(1);
    }
}

@keyframes g2-pop {
    0% {
        transform: translate(
            calc(var(--g2-gap) + (var(--g2-x) * (100% + var(--g2-gap)))),
            calc(var(--g2-gap) + (var(--g2-y) * (100% + var(--g2-gap))))
        ) scale(1);
    }
    55% {
        transform: translate(
            calc(var(--g2-gap) + (var(--g2-x) * (100% + var(--g2-gap)))),
            calc(var(--g2-gap) + (var(--g2-y) * (100% + var(--g2-gap))))
        ) scale(1.12);
    }
    100% {
        transform: translate(
            calc(var(--g2-gap) + (var(--g2-x) * (100% + var(--g2-gap)))),
            calc(var(--g2-gap) + (var(--g2-y) * (100% + var(--g2-gap))))
        ) scale(1);
    }
}

@keyframes g2-score-rise {
    0% {
        opacity: 0;
        transform: translateY(6px);
    }
    25% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateY(-18px);
    }
}

@media (max-width: 560px) {
    .g2-shell {
        padding: 4px 0 24px;
    }

    .g2-bar {
        margin-bottom: 8px;
    }

    .g2-scores {
        order: 1;
        flex-basis: 100%;
    }

    .g2-tools {
        order: 2;
        width: 100%;
        justify-content: space-between;
    }

    .g2-score-card {
        padding: 6px 10px;
    }

    .g2-score-card strong {
        font-size: 1.1rem;
    }

    .g2-stat-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .g2-status {
        min-height: 18px;
        margin-bottom: 8px;
        font-size: 0.8rem;
    }

    .g2-controls {
        margin-top: 8px;
    }

    .g2-tabs {
        margin-top: 6px;
        gap: 6px;
    }

    .g2-tab {
        min-width: 0;
        font-size: 0.82rem;
    }

    .g2-tabs-size {
        display: none;
    }

    .g2-tab-cycle {
        display: inline-grid;
        place-items: center;
        flex: 0 0 auto;
        min-width: 58px;
        border-color: var(--cg-teal);
        color: var(--cg-teal);
    }
}

@media (prefers-reduced-motion: reduce) {
    .g2-tile,
    .g2-button,
    .g2-icon-button,
    .g2-tab,
    .g2-chip {
        transition: none;
    }

    .g2-tile-new,
    .g2-tile-merged,
    .g2-score-pop-on {
        animation: none;
    }
}