/* ================================================================
   공통 컴포넌트 — 버튼, 폼, 카드, 알림
   ================================================================ */

/* ---- 버튼 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  font-weight: 600;
  font-family: var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity .15s, transform .1s;
  white-space: nowrap;
}

.btn:hover {
  opacity: .88;
  text-decoration: none;
}

.btn:active {
  transform: scale(.98);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 16px 40px;
  font-size: var(--text-md);
}

/* ---- 폼 ---- */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group input[type="url"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid #D0C8DC;
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background: #fff;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(74, 44, 110, .1);
}

.form-group input:disabled {
  background: #F5F3F8;
  color: var(--color-text-muted);
  cursor: not-allowed;
}

.form-group .hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.form-row {
  display: flex;
  gap: 14px;
}

.form-row .form-group {
  flex: 1;
}

/* 성별 라디오 */
.gender-options {
  display: flex;
  gap: var(--space-md);
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: var(--text-base);
  padding: 10px 20px;
  border: 1.5px solid #D0C8DC;
  border-radius: var(--radius-sm);
  transition: border-color .15s, background .15s;
  flex: 1;
  justify-content: center;
}

.radio-option:has(input:checked) {
  border-color: var(--color-primary);
  background: rgba(74, 44, 110, .06);
}

.radio-option input[type="radio"] {
  accent-color: var(--color-primary);
}

/* 체크박스 */
.checkbox-option {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: var(--text-sm);
}

.checkbox-option input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* 필수 마크 */
.required {
  color: var(--color-error);
  margin-left: 2px;
}

/* 섹션 제목 */
.form-section-title {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: var(--space-md);
  padding-bottom: 6px;
  border-bottom: 1px solid #E8E0F0;
}

/* ---- 알림 ---- */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.alert-error {
  background: #FEF0F0;
  border-left: 4px solid var(--color-error);
  color: #7B2020;
}

.alert-success {
  background: #EFF8F2;
  border-left: 4px solid var(--color-success);
  color: #1A5C36;
}

.alert-info {
  background: #F0EEF8;
  border-left: 4px solid var(--color-primary);
  color: var(--color-primary-dark);
}

.alert-warning {
  background: #FFF8EC;
  border-left: 4px solid var(--color-warning);
  color: #7B5500;
}

/* ---- 카드 ---- */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.card__header {
  padding: var(--space-lg) var(--space-lg);
  border-bottom: 1px solid #F0EDE8;
}

.card__body {
  padding: var(--space-lg);
}

.card__footer {
  padding: var(--space-md) var(--space-lg);
  background: #F8F5FF;
  border-top: 1px solid #E8E0F0;
}

/* ---- 구분선 ---- */
.divider {
  border: none;
  border-top: 1px solid #EEEAF5;
  margin: var(--space-lg) 0;
}

/* ---- 반응형 ---- */
@media (max-width: 600px) {
  .form-row {
    flex-direction: column;
    gap: 0;
  }
}