/* Przelicznik jednostek — layout (no colors, uses theme CSS variables). */

.pbn-converter {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ── Form row ─────────────────────────────────────────────────────── */

.pbn-converter-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1rem;
    align-items: end;
}

/* When category select is present (main page), use 4-column layout */
.pbn-converter-row:has(.pbn-converter-category) {
    grid-template-columns: minmax(100px, 0.8fr) 1fr auto 1fr;
}

.pbn-converter-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.pbn-converter-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary, #6b7280);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.pbn-converter-field input,
.pbn-converter-field select {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 0.5rem;
    background: var(--card-bg, #fff);
    color: var(--text-color, #1f2937);
    font-size: 1rem;
    min-height: 44px;
    width: 100%;
    box-sizing: border-box;
    transition: border-color 0.15s;
}

.pbn-converter-field input:hover,
.pbn-converter-field select:hover {
    border-color: var(--primary-color, #3b82f6);
}

.pbn-converter-value input {
    font-size: 1.25rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

/* ── Swap button ──────────────────────────────────────────────────── */

.pbn-converter-swap {
    align-self: end;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    min-width: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color, #d1d5db);
    background: var(--card-bg, #fff);
    color: var(--text-color, #1f2937);
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
    transition: border-color 0.15s, color 0.15s, transform 0.2s;
    flex-shrink: 0;
}

.pbn-converter-swap:hover {
    border-color: var(--primary-color, #3b82f6);
    color: var(--primary-color, #3b82f6);
    transform: rotate(180deg);
}

.pbn-converter-swap[hidden] {
    display: none;
}

/* ── Result card ──────────────────────────────────────────────────── */

.pbn-converter-result {
    padding: 1.5rem;
    border-radius: 0.75rem;
    background: var(--accent-bg, #f0f9ff);
    border: 1px solid var(--accent-border, #bae6fd);
    text-align: center;
}

.pbn-converter-result-main {
    font-size: 2rem;
    font-weight: 700;
    color: var(--heading-color, #111827);
    font-variant-numeric: tabular-nums;
    word-break: break-word;
}

.pbn-converter-result-unit {
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--text-secondary, #6b7280);
    margin-left: 0.35em;
}

.pbn-converter-result-eq {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary, #6b7280);
}

.pbn-converter-result-empty {
    font-size: 0.9375rem;
    color: var(--text-secondary, #6b7280);
    padding: 0.5rem 0;
}

/* ── Related pairs ────────────────────────────────────────────────── */

.pbn-converter-related {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color, #d1d5db);
}

.pbn-converter-related h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 1rem;
    color: var(--heading-color, #111827);
}

.pbn-converter-related ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 0.625rem;
}

.pbn-converter-related li a {
    display: block;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--link-color, #2563eb);
    background: var(--card-bg, #fff);
    font-size: 0.875rem;
    transition: border-color 0.15s, color 0.15s;
}

.pbn-converter-related li a:hover {
    border-color: var(--primary-color, #3b82f6);
    color: var(--primary-color, #3b82f6);
}

/* ── Responsive ───────────────────────────────────────────────────── */

@media (max-width: 640px) {
    .pbn-converter-row,
    .pbn-converter-row:has(.pbn-converter-category) {
        grid-template-columns: 1fr;
    }

    .pbn-converter-swap {
        justify-self: center;
        transform: rotate(90deg);
    }

    .pbn-converter-swap:hover {
        transform: rotate(270deg);
    }

    .pbn-converter-result-main {
        font-size: 1.5rem;
    }

    .pbn-converter-related ul {
        grid-template-columns: 1fr;
    }
}