/* ===================================
   Radio Group 樣式
   優雅的單選按鈕群組設計
   =================================== */

.radio-group {
    display: flex;
    gap: 12px;
    margin: 12px 0;
}

.radio-group label {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    background: var(--background-light, #ffffff);
    border: 2px solid var(--border-color, #dee2e6);
    border-radius: var(--border-radius-sm, 6px);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    color: var(--text-color, #2c3e50);
    user-select: none;
    min-width: 100px;
    justify-content: center;
}

.radio-group label:hover {
    background: var(--background-hover, #f0f2ff);
    border-color: var(--primary-color, #4db8a8);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm, 0 2px 4px rgba(0, 0, 0, 0.05));
}

.radio-group input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.radio-group input[type="radio"]:checked+label,
.radio-group label:has(input[type="radio"]:checked) {
    background: var(--primary-color, #4db8a8);
    border-color: var(--primary-color, #4db8a8);
    color: var(--text-white, #ffffff);
    box-shadow: var(--shadow-primary, 0 4px 12px rgba(77, 184, 168, 0.3));
}

.radio-group input[type="radio"]:checked+label::before,
.radio-group label:has(input[type="radio"]:checked)::before {
    content: '✓';
    position: absolute;
    left: 8px;
    font-size: 14px;
    font-weight: bold;
}

.radio-group label:active {
    transform: translateY(0);
}

/* 響應式設計 */
@media (max-width: 768px) {
    .radio-group {
        flex-direction: column;
        gap: 8px;
    }

    .radio-group label {
        width: 100%;
    }
}

/* 為表單組添加樣式 */
.form-group label:not(.radio-group label) {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color, #2c3e50);
}

.form-group .text-muted {
    display: block;
    margin-top: 6px;
    font-size: 0.875rem;
    color: var(--text-muted, #999);
    line-height: 1.4;
}