/* ===== Form styles ===== */
.form-card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    max-width: 700px;
}

.form-card .card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
}

.form-card .card-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-dark);
}

.form-body {
    padding: 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-field.full {
    grid-column: 1 / -1;
}

.form-field label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-sub);
}

.form-field label .req {
    color: var(--danger);
    margin-left: 2px;
}

.form-field input,
.form-field select,
.form-field textarea {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-family: var(--font);
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(45, 90, 135, .1);
}

.form-field textarea {
    min-height: 80px;
    resize: vertical;
}

.form-footer {
    grid-column: 1 / -1;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding-top: 8px;
    border-top: 1px solid var(--border);
    margin-top: 8px;
    padding-top: 16px;
}

.form-hint {
    font-size: 11px;
    color: var(--text-light);
    margin-top: 2px;
}

.form-section-title {
    grid-column: 1 / -1;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 4px;
    padding-bottom: 8px;
    border-bottom: 1px solid #f0f1f3;
}

.form-total-row {
    grid-column: 1 / -1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #f7f8fa;
    border-radius: var(--radius-sm);
}

.form-total-row .label {
    font-size: 14px;
    color: var(--text-sub);
}

.form-total-row .value {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-overlay.show { display: flex; }

.modal-box {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 400px;
    max-width: 90vw;
}

.modal-box .modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
    font-weight: 600;
}

.modal-box .modal-body {
    padding: 20px;
}

.modal-box .modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

/* ===== 響應式：移動端 ===== */
@media (max-width: 768px) {
    .form-card {
        max-width: 100%;
        border-radius: 6px;
    }
    .form-card .card-header {
        padding: 12px 16px;
    }
    .form-card .card-header h3 {
        font-size: 15px;
    }
    .form-body {
        padding: 16px;
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .form-field label {
        font-size: 12px;
    }
    .form-field input,
    .form-field select,
    .form-field textarea {
        padding: 9px 12px;
        font-size: 14px; /* 防止 iOS 縮放 */
        min-height: 40px;
    }
    .form-footer {
        padding-top: 12px;
        margin-top: 4px;
        flex-wrap: wrap;
    }
    .form-footer .btn {
        flex: 1;
        justify-content: center;
        min-height: 40px;
    }
    .form-section-title {
        font-size: 13px;
        margin-bottom: 2px;
        padding-bottom: 6px;
    }
    .form-total-row {
        padding: 10px 12px;
    }
    .form-total-row .value {
        font-size: 18px;
    }

    /* combobox 優化 */
    .combobox-dropdown {
        max-height: 200px;
    }
    .combobox-option {
        padding: 10px 12px;
        font-size: 14px;
        min-height: 40px;
    }
}

@media (max-width: 480px) {
    .form-body {
        padding: 12px;
        gap: 12px;
    }
    .form-card .card-header {
        padding: 10px 12px;
    }
}