/* ── Level selector (shared with other games) ── */
.level-selector {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.level-btn {
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--light-quaternary);
    background: var(--light-secondary);
    color: var(--dark);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.level-btn:hover { background: var(--light-tertiary); border-color: var(--primary); color: var(--primary); }
.level-btn.active { background: var(--primary); color: white; border-color: var(--primary); box-shadow: 0 2px 8px rgba(37,99,235,0.3); }

/* ── Game container ── */
.dominosa-wrap {
    display: flex;
    gap: 24px;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
}

/* ── Board ── */
.dominosa-board {
    display: grid;
    border: 2px solid var(--dark);
    border-radius: 6px;
    overflow: hidden;
    user-select: none;
    background: var(--light-quaternary);
    gap: 1px;
}

.ds-cell {
    width: 52px;
    height: 52px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace;
    color: var(--dark);
    cursor: pointer;
    position: relative;
    border: 3px solid transparent;
    transition: background 0.15s ease, border-color 0.15s ease;
    box-sizing: border-box;
}

.ds-cell:hover { background: var(--light-secondary); }

.ds-cell.selected {
    background: rgba(37, 99, 235, 0.12);
    border-color: var(--primary) !important;
}

/* Placed domino half styling — borders on the "outside" of each half */
.ds-cell.placed {
    background: var(--dc-bg, rgba(37,99,235,0.07));
}

/* Horizontal placements */
.ds-cell.placed-h-left {
    border-top-color: var(--dc, #2563eb);
    border-left-color: var(--dc, #2563eb);
    border-bottom-color: var(--dc, #2563eb);
    border-right-color: transparent;
    border-top-left-radius: 6px;
    border-bottom-left-radius: 6px;
}

.ds-cell.placed-h-right {
    border-top-color: var(--dc, #2563eb);
    border-right-color: var(--dc, #2563eb);
    border-bottom-color: var(--dc, #2563eb);
    border-left-color: transparent;
    border-top-right-radius: 6px;
    border-bottom-right-radius: 6px;
}

/* Vertical placements */
.ds-cell.placed-v-top {
    border-top-color: var(--dc, #2563eb);
    border-left-color: var(--dc, #2563eb);
    border-right-color: var(--dc, #2563eb);
    border-bottom-color: transparent;
    border-top-left-radius: 6px;
    border-top-right-radius: 6px;
}

.ds-cell.placed-v-bottom {
    border-bottom-color: var(--dc, #2563eb);
    border-left-color: var(--dc, #2563eb);
    border-right-color: var(--dc, #2563eb);
    border-top-color: transparent;
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
}

/* Conflict: same domino placed twice */
.ds-cell.conflict {
    background: rgba(239, 68, 68, 0.12) !important;
    border-color: #dc2626 !important;
}

/* ── Domino tracker ── */
.ds-tracker {
    background: var(--light-secondary);
    border: 1px solid var(--light-quaternary);
    border-radius: 12px;
    padding: 16px;
    min-width: 160px;
    max-width: 200px;
    flex-shrink: 0;
}

.ds-tracker h4 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray);
    margin-bottom: 12px;
}

.ds-tracker-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.ds-tile {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    border: 2px solid var(--light-quaternary);
    background: white;
    color: var(--gray);
    transition: all 0.2s ease;
    position: relative;
}

.ds-tile::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 20%;
    bottom: 20%;
    width: 1.5px;
    background: var(--light-quaternary);
}

.ds-tile.placed-ok {
    border-color: var(--dc, var(--primary));
    background: var(--dc-bg, rgba(37,99,235,0.06));
    color: var(--dark);
    text-decoration: none;
}

.ds-tile.placed-conflict {
    border-color: #dc2626;
    background: rgba(239,68,68,0.07);
    color: #dc2626;
}

.ds-tile-a { padding-right: 10px; }
.ds-tile-b { padding-left: 10px; }

.ds-progress {
    font-size: 0.8rem;
    color: var(--gray);
    text-align: center;
    margin-top: 12px;
}

.ds-progress strong { color: var(--primary); }

/* ── Status bar ── */
.ds-status {
    text-align: center;
    font-size: 0.92rem;
    color: var(--gray);
    margin: 8px 0;
    min-height: 1.4em;
}

/* ── Responsive ── */
@media (max-width: 700px) {
    .ds-cell { width: 40px; height: 40px; font-size: 1.05rem; }
    .dominosa-wrap { gap: 16px; }
    .ds-tracker { min-width: 120px; padding: 12px; }
    .ds-tracker-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .ds-cell { width: 34px; height: 34px; font-size: 0.9rem; border-width: 2px; }
    .ds-tracker { display: none; }
}