.ttt-page {
    --ttt-x: #4ecdc4;
    --ttt-o: #f4d35e;
    --ttt-blue: #89a6ff;
    --ttt-red: #e94560;
    --ttt-ink: #f8f8ff;
    --ttt-cell: #10101d;
    --ttt-cell-2: #17172c;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 1120px;
    margin: 0 auto;
}

.ttt-topbar {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 1rem;
}

.ttt-back {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    color: var(--color-text-muted);
    font-weight: 700;
}

.ttt-back:hover {
    color: var(--color-text);
}

.ttt-title-block {
    min-width: 0;
    text-align: center;
}

.ttt-title-block h1 {
    margin: 0;
    color: var(--color-text);
    font-size: 2rem;
}

.ttt-title-block p {
    margin-top: 0.2rem;
    color: var(--color-text-muted);
}

.ttt-icon-button {
    display: inline-grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    font: inherit;
    font-size: 1.35rem;
    transition: border-color var(--tr), background var(--tr), transform var(--tr);
}

.ttt-icon-button:hover {
    border-color: var(--ttt-x);
    background: var(--color-surface-hover);
    transform: translateY(-1px);
}

.ttt-layout {
    display: grid;
    grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
}

.ttt-controls,
.ttt-stage {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(78, 205, 196, 0.08), transparent 38%),
        linear-gradient(315deg, rgba(244, 211, 94, 0.07), transparent 42%),
        var(--color-surface);
}

.ttt-controls {
    position: sticky;
    top: calc(var(--nav-height) + 1rem);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
}

.ttt-control-group {
    display: grid;
    gap: 0.45rem;
}

.ttt-label {
    color: var(--color-text-muted);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.ttt-segmented {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.25rem;
    padding: 0.25rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg);
}

.ttt-segmented-three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ttt-segmented button {
    min-width: 0;
    min-height: 42px;
    padding: 0.45rem 0.5rem;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    font: inherit;
    font-size: 0.86rem;
    font-weight: 800;
    overflow-wrap: anywhere;
    transition: background var(--tr), color var(--tr), box-shadow var(--tr);
}

.ttt-segmented button:hover {
    color: var(--color-text);
    background: var(--color-surface-hover);
}

.ttt-segmented button.active {
    color: #07100f;
    background: var(--ttt-x);
    box-shadow: 0 8px 18px rgba(78, 205, 196, 0.18);
}

.ttt-scoreboard {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
}

.ttt-score {
    display: grid;
    place-items: center;
    min-height: 70px;
    padding: 0.55rem 0.35rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: rgba(8, 8, 15, 0.58);
}

.ttt-score span {
    color: var(--color-text-muted);
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
}

.ttt-score strong {
    color: var(--color-text);
    font-family: "Space Grotesk", "Inter", sans-serif;
    font-size: 1.6rem;
    line-height: 1;
}

.ttt-score-x strong {
    color: var(--ttt-x);
}

.ttt-score-o strong {
    color: var(--ttt-o);
}

.ttt-stage {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 0;
    padding: 1rem;
}

.ttt-status-row {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 0.75rem;
    min-height: 48px;
}

.ttt-turn-chip {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 2px solid currentColor;
    border-radius: 8px;
    color: var(--ttt-x);
    font-family: "Space Grotesk", "Inter", sans-serif;
    font-size: 1.45rem;
    font-weight: 900;
    line-height: 1;
}

.ttt-turn-chip.mark-o {
    color: var(--ttt-o);
}

.ttt-status {
    min-width: 0;
    color: var(--color-text);
    font-weight: 800;
    overflow-wrap: anywhere;
}

.ttt-board-shell {
    display: grid;
    place-items: center;
    width: 100%;
    min-width: 0;
}

.ttt-board {
    width: min(100%, 640px);
    aspect-ratio: 1;
    min-width: 0;
}

.ttt-board.ttt-simple {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.65rem;
}

.ttt-cell,
.ttt-mini-cell {
    min-width: 0;
    aspect-ratio: 1;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.06), transparent 42%),
        var(--ttt-cell);
    color: var(--ttt-ink);
    cursor: pointer;
    font-family: "Space Grotesk", "Inter", sans-serif;
    font-weight: 900;
    line-height: 1;
    transition: border-color var(--tr), background var(--tr), transform var(--tr), opacity var(--tr);
}

.ttt-cell {
    display: grid;
    place-items: center;
    font-size: 5.4rem;
}

.ttt-cell:hover:not(:disabled),
.ttt-mini-cell:hover:not(:disabled) {
    border-color: var(--ttt-blue);
    background:
        linear-gradient(145deg, rgba(137, 166, 255, 0.15), transparent 46%),
        var(--ttt-cell-2);
    transform: translateY(-1px);
}

.ttt-cell:disabled,
.ttt-mini-cell:disabled {
    cursor: default;
}

.ttt-cell.mark-x,
.ttt-mini-cell.mark-x {
    color: var(--ttt-x);
    border-color: rgba(78, 205, 196, 0.35);
}

.ttt-cell.mark-o,
.ttt-mini-cell.mark-o {
    color: var(--ttt-o);
    border-color: rgba(244, 211, 94, 0.35);
}

.ttt-cell.is-oldest {
    opacity: 0.58;
    border-style: dashed;
}

.ttt-cell.is-winner {
    border-color: var(--ttt-red);
    box-shadow: inset 0 0 0 2px rgba(233, 69, 96, 0.45), 0 0 24px rgba(233, 69, 96, 0.2);
}

.ttt-board.ttt-ception {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.55rem;
    width: min(100%, 700px);
}

.ttt-mini-board {
    position: relative;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.25rem;
    aspect-ratio: 1;
    min-width: 0;
    padding: 0.45rem;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.05), transparent 35%),
        rgba(8, 8, 15, 0.72);
    transition: border-color var(--tr), box-shadow var(--tr), opacity var(--tr);
}

.ttt-mini-board.is-playable {
    border-color: rgba(78, 205, 196, 0.78);
    box-shadow: 0 0 0 1px rgba(78, 205, 196, 0.18), 0 0 24px rgba(78, 205, 196, 0.12);
}

.ttt-mini-board.is-claimed {
    border-color: rgba(255, 255, 255, 0.16);
}

.ttt-mini-board.is-winner {
    box-shadow: 0 0 0 2px rgba(233, 69, 96, 0.52), 0 0 26px rgba(233, 69, 96, 0.22);
}

.ttt-mini-board.is-resetting {
    animation: tttResetPulse 0.55s ease;
}

.ttt-mini-label {
    position: absolute;
    top: 0.22rem;
    left: 0.32rem;
    z-index: 1;
    color: rgba(238, 238, 245, 0.42);
    font-size: 0.62rem;
    font-weight: 900;
}

.ttt-mini-cell {
    display: grid;
    place-items: center;
    border-radius: 4px;
    font-size: 1.25rem;
}

.ttt-mini-overlay {
    position: absolute;
    inset: 0;
    z-index: 3;
    display: grid;
    place-items: center;
    border-radius: 6px;
    background: rgba(8, 8, 15, 0.82);
    font-family: "Space Grotesk", "Inter", sans-serif;
    font-size: 5.2rem;
    font-weight: 900;
    line-height: 1;
}

.ttt-mini-overlay.mark-x {
    color: var(--ttt-x);
    box-shadow: inset 0 0 0 2px rgba(78, 205, 196, 0.48);
}

.ttt-mini-overlay.mark-o {
    color: var(--ttt-o);
    box-shadow: inset 0 0 0 2px rgba(244, 211, 94, 0.48);
}

@keyframes tttResetPulse {
    0% {
        border-color: var(--ttt-o);
        background: rgba(244, 211, 94, 0.16);
    }
    100% {
        border-color: rgba(78, 205, 196, 0.78);
    }
}

@media (max-width: 880px) {
    .ttt-layout {
        grid-template-columns: 1fr;
    }

    .ttt-controls {
        position: static;
    }

    .ttt-cell {
        font-size: 4.4rem;
    }
}

@media (max-width: 560px) {
    .ttt-page {
        gap: 0.8rem;
    }

    .ttt-topbar {
        grid-template-columns: auto auto;
    }

    .ttt-title-block {
        grid-column: 1 / -1;
        grid-row: 2;
        text-align: left;
    }

    .ttt-title-block h1 {
        font-size: 1.65rem;
    }

    .ttt-title-block p {
        font-size: 0.92rem;
    }

    .ttt-icon-button {
        justify-self: end;
    }

    .ttt-controls,
    .ttt-stage {
        padding: 0.75rem;
    }

    .ttt-segmented {
        grid-template-columns: 1fr;
    }

    .ttt-segmented-three {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .ttt-segmented button {
        min-height: 40px;
        font-size: 0.78rem;
    }

    .ttt-board.ttt-simple {
        gap: 0.45rem;
    }

    .ttt-cell {
        font-size: 3.25rem;
        border-radius: 7px;
    }

    .ttt-board.ttt-ception {
        gap: 0.35rem;
    }

    .ttt-mini-board {
        gap: 0.16rem;
        padding: 0.25rem;
        border-width: 1px;
        border-radius: 6px;
    }

    .ttt-mini-cell {
        border-radius: 3px;
        font-size: 0.72rem;
    }

    .ttt-mini-overlay {
        font-size: 3rem;
    }
}