/*
 * Convertisseur d'Unités - Unit Converter Styles (FR)
 */

/* ========== Category Tabs ========== */
.category-tabs {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.category-tabs::-webkit-scrollbar {
    height: 4px;
}

.category-tabs::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 2px;
}

.category-tabs::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.category-tab {
    flex-shrink: 0;
    padding: 0.6rem 1.25rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.category-tab:hover {
    background: var(--accent-light);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.category-tab.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

/* ========== Converter Form ========== */
.converter-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.converter-row {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}

.converter-field {
    flex: 0 0 auto;
}

.converter-field:first-child {
    flex: 0 0 180px;
}

.converter-value-field {
    flex: 1 1 auto;
    min-width: 0;
}

.converter-field label {
    display: block;
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.35rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.converter-field select,
.converter-field input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.converter-field select:focus,
.converter-field input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.converter-field input[readonly] {
    background: var(--bg-tertiary);
    cursor: default;
    font-weight: 600;
}

/* ========== Swap Button ========== */
.converter-swap {
    display: flex;
    justify-content: center;
    padding: 0.25rem 0;
}

.swap-btn {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.swap-btn:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    transform: rotate(180deg);
}

.swap-btn svg {
    width: 22px;
    height: 22px;
}

/* ========== Formula Display ========== */
.formula-display {
    background: var(--accent-light);
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.formula-label {
    font-weight: 600;
    color: var(--accent-secondary);
    margin-right: 0.5rem;
}

.formula-text {
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

/* ========== Quick Reference Table ========== */
.quick-reference {
    margin-bottom: 2rem;
}

.quick-reference h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.reference-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.reference-table thead th {
    background: var(--bg-tertiary);
    padding: 0.6rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.reference-table tbody td {
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.reference-table tbody tr:hover {
    background: var(--bg-tertiary);
}

.reference-table tbody tr:last-child td {
    border-bottom: none;
}

/* ========== Responsive ========== */
@media (max-width: 600px) {
    .converter-row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .converter-field:first-child {
        flex: 1 1 auto;
    }

    .converter-swap {
        transform: rotate(90deg);
        padding: 0;
    }

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

    .category-tabs {
        gap: 0.35rem;
    }

    .category-tab {
        padding: 0.5rem 0.85rem;
        font-size: 0.8rem;
    }

    .reference-table {
        font-size: 0.8rem;
    }

    .reference-table thead th,
    .reference-table tbody td {
        padding: 0.4rem 0.6rem;
    }
}