/* 기본 설정 */
* {
  box-sizing: border-box;
  font-family: 'Pretendard', sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background-color: #f8f9fa;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

/* 카드 컨테이너 */
.auth-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  width: 100%;
  max-width: 450px; /* 로그인/회원가입 공통 적정 너비 */
  background: #ffffff;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* 헤더 (초록색 배경 영역) */
.auth-header {
  background-color: #009b63;
  padding: 30px 20px;
  text-align: center;
  color: #ffffff;
}

.auth-title {
  margin: 0;
  font-size: 32px;
  font-weight: 800;
}

.auth-title a {
  color: #ffffff;
  text-decoration: none;
}

.auth-subtitle {
  margin-top: 8px;
  font-size: 15px;
  opacity: 0.9;
}

/* 폼 본문 */
.auth-body {
  padding: 30px 25px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* 입력 그룹 */
.form-group {
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #333;
}

.required {
  color: #ef4444;
  margin-left: 2px;
}

/* 인풋창 스타일 */
.form-input {
  width: 100%;
  height: 48px;
  padding: 0 15px;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  font-size: 15px;
  color: #333;
  outline: none;
  transition: border-color 0.2s;
}

.form-input:focus {
  border-color: #009b63;
}

.form-input::placeholder {
  color: #cbd5e1;
}

/* 중복체크용 가로 배치 */
.form-inline {
  display: flex;
  gap: 10px;
}

.form-inline .form-input {
  flex: 1;
}

/* 성별 라디오 버튼 */
.form-radio {
  display: flex;
  gap: 20px;
  padding: 5px 0;
}

.form-radio label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  cursor: pointer;
}

/* 키/몸무게 단위 표시 */
.form-unit {
  position: relative;
  display: flex;
  align-items: center;
}

.unit-text {
  position: absolute;
  right: 15px;
  color: #64748b;
  font-size: 14px;
}

/* 버튼 섹션 */
.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 10px;
}

.btn {
  flex: 1;
  height: 50px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
}

/* 가입하기/로그인 (Solid Green) */
.btn-primary {
  background-color: #009b63;
  color: #ffffff !important;
}

.btn-primary:hover {
  background-color: #008452;
}

/* 취소/Signup (Outline) */
.btn-outline {
  background-color: #ffffff;
  color: #009b63 !important;
  border: 2px solid #009b63;
}

.btn-outline:hover {
  background-color: #f0fff4;
}

/* 중복체크 버튼 (Dark Gray) */
.btn-dark {
  background-color: #475569;
  color: #ffffff;
  padding: 0 20px;
  height: 48px;
  border-radius: 12px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn-dark:hover {
  background-color: #334155;
}

.alert {
    padding: 12px 16px;
    margin-bottom: 20px;
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.5;
    animation: slideDown 0.3s ease-out;
}

.alert-danger {
    background-color: #fee;
    color: #c33;
    border: 1px solid #fcc;
}

.alert-info {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

/* 슬라이드 애니메이션 */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 푸터 */
.auth-footer {
  text-align: center;
  padding: 20px;
  border-top: 1px solid #f1f5f9;
  font-size: 13px;
  color: #94a3b8;
}

.form-msg {
  font-size: 12px;
  margin-top: 5px;
}