:root {
    --bg: #1a1a1d;
    --bg-elev: #232327;
    --bg-elev2: #2c2c31;
    --border: #38383d;
    --text: #e9e9ec;
    --text-dim: #9a9aa2;
    --accent: #6ea8ff;
    --good: #4ade80;
    --bad: #f87171;
    --warn: #fbbf24;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font: 14px/1.4 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

h1 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.2px;
}

h3 {
    margin: 12px 0 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-elev);
}

.scoreboard {
    display: flex;
    gap: 18px;
}

.scoreboard div {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    min-width: 56px;
}

.lbl {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-dim);
}

#score,
#streak,
#pool {
    font-size: 18px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-elev);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-dim);
}

.hint-text {
    font-size: 11px;
    color: var(--text-dim);
}

.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.chip {
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--bg-elev2);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 12px;
    cursor: pointer;
    user-select: none;
}

.chip:hover {
    border-color: var(--accent);
    color: var(--text);
}

.chip.active {
    background: var(--accent);
    color: #0b1320;
    border-color: var(--accent);
    font-weight: 600;
}

.layout {
    display: grid;
    grid-template-columns: minmax(360px, 1fr) 360px;
    gap: 20px;
    padding: 20px;
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 900px) {
    .layout {
        grid-template-columns: 1fr;
    }
}

.board-wrap {
    display: flex;
    justify-content: center;
}

.board {
    width: min(70vh, 100%);
    aspect-ratio: 1 / 1;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
    transition: box-shadow 0.25s;
}

.board.flash-good {
    box-shadow: 0 0 0 3px var(--good), 0 6px 24px rgba(0, 0, 0, 0.45);
}

.board.flash-bad {
    box-shadow: 0 0 0 3px var(--bad), 0 6px 24px rgba(0, 0, 0, 0.45);
}

.side {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.puzzle-meta {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
}

.stm {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status {
    margin-top: 4px;
    font-size: 16px;
    font-weight: 600;
    min-height: 22px;
}

.status.good {
    color: var(--good);
}

.status.bad {
    color: var(--bad);
}

.status.warn {
    color: var(--warn);
}

.meta {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-dim);
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.meta .tag {
    background: var(--bg-elev2);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

.actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.actions .primary {
    grid-column: 1 / -1;
}

button {
    padding: 9px 12px;
    background: var(--bg-elev2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

button:hover:not(:disabled) {
    border-color: var(--accent);
}

button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

button small {
    color: var(--text-dim);
    font-weight: normal;
    margin-left: 4px;
}

button.primary {
    background: var(--accent);
    color: #0b1320;
    border-color: var(--accent);
}

button.primary:hover:not(:disabled) {
    filter: brightness(1.1);
}

button.ghost {
    background: transparent;
    color: var(--text-dim);
    font-size: 12px;
    margin-top: 8px;
}

.stats {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 14px;
}

.stats summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 12px;
}

.stats-overall {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-top: 10px;
}

.stats-overall div {
    background: var(--bg-elev2);
    padding: 6px 8px;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
}

.stats-overall span:last-child {
    font-size: 16px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.breakdown {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
    font-variant-numeric: tabular-nums;
}

.breakdown td {
    padding: 3px 6px;
    border-top: 1px solid var(--border);
}

.breakdown td:first-child {
    color: var(--text-dim);
    text-transform: capitalize;
}

.breakdown td:last-child {
    text-align: right;
}

.breakdown tr:first-child td {
    border-top: none;
}

.credits {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 20px 32px;
    font-size: 12px;
    color: var(--text-dim);
    line-height: 1.6;
    border-top: 1px solid var(--border);
}

.credits p {
    margin: 4px 0;
}

.credits a {
    color: var(--text-dim);
    text-decoration: underline;
    text-decoration-color: var(--border);
}

.credits a:hover {
    color: var(--accent);
    text-decoration-color: var(--accent);
}