/* Dots and Boxes */

.db-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.85rem;
    user-select: none;
}

.db-modes,
.db-sizes {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.db-mode,
.db-size {
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-card-bg);
    color: var(--color-text);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.db-mode:hover,
.db-size:hover { border-color: var(--color-primary-dark); }

.db-mode.active,
.db-size.active {
    background: var(--color-primary);
    border-color: var(--color-primary-dark);
}

.db-status {
    font-size: 1.1rem;
    font-weight: 700;
    min-height: 1.5em;
    margin: 0;
    text-align: center;
}

/* Everything is absolutely placed from its own --r/--c, so dots, lines and
   boxes all land on the same lattice without a grid definition per size. */
.db-board {
    --db-n: 4;
    --db-gap: min(calc(80vw / var(--db-n)), 76px);
    --db-dot: 12px;
    position: relative;
    width: calc(var(--db-gap) * var(--db-n) + var(--db-dot));
    height: calc(var(--db-gap) * var(--db-n) + var(--db-dot));
    margin: 0.4rem 0;
}

.db-dot,
.db-line,
.db-box {
    position: absolute;
}

.db-dot {
    width: var(--db-dot);
    height: var(--db-dot);
    border-radius: 50%;
    background: var(--color-text);
    left: calc(var(--c) * var(--db-gap));
    top: calc(var(--r) * var(--db-gap));
    z-index: 3;
}

.db-line {
    border: none;
    padding: 0;
    background: var(--color-border-light);
    cursor: pointer;
    border-radius: 3px;
    z-index: 2;
    -webkit-tap-highlight-color: transparent;
}

.db-h {
    left: calc(var(--c) * var(--db-gap) + var(--db-dot));
    top: calc(var(--r) * var(--db-gap) + var(--db-dot) / 2 - 3px);
    width: calc(var(--db-gap) - var(--db-dot));
    height: 6px;
}

.db-v {
    left: calc(var(--c) * var(--db-gap) + var(--db-dot) / 2 - 3px);
    top: calc(var(--r) * var(--db-gap) + var(--db-dot));
    width: 6px;
    height: calc(var(--db-gap) - var(--db-dot));
}

.db-line:hover:not(.drawn) { background: var(--color-primary); }
.db-line.drawn { background: var(--color-text); cursor: default; }
.db-line.last { background: var(--color-primary-dark); }

.db-box {
    left: calc(var(--c) * var(--db-gap) + var(--db-dot));
    top: calc(var(--r) * var(--db-gap) + var(--db-dot));
    width: calc(var(--db-gap) - var(--db-dot));
    height: calc(var(--db-gap) - var(--db-dot));
    z-index: 1;
}

.db-box.you { background: rgba(52, 152, 219, 0.4); }
.db-box.cpu { background: rgba(231, 76, 60, 0.4); }

.db-line:focus-visible {
    outline: 3px solid var(--color-text);
    outline-offset: 2px;
}

.state-result .db-line { pointer-events: none; }

.db-score {
    display: flex;
    gap: 1.5rem;
    font-weight: 600;
    color: var(--color-text-light);
    font-variant-numeric: tabular-nums;
}

.db-btn {
    padding: 0.7rem 2rem;
    font-size: 1.05rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-primary);
    color: var(--color-text);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.db-btn:hover { background: var(--color-primary-dark); }

.db-mode:focus-visible,
.db-size:focus-visible,
.db-btn:focus-visible {
    outline: 3px solid var(--color-text);
    outline-offset: 2px;
}