* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
}

/* 헤더 스타일 - 메인 헤더와 완전 동일하게 */
.header {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
    font-family: 'Noto Sans KR', sans-serif;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    box-sizing: border-box;
}

/* 로고 스타일 - 메인 헤더와 동일 */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-image {
    height: 77px;
    width: 267px;
}

/* 메인으로 버튼 스타일 - 메인 헤더의 버튼 스타일과 통일 */
.back-link {
    display: flex;
    align-items: center;
    gap: 6px;
    color: #374B5F;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 6px;
    border: 1px solid #ddd;
    background-color: #f8f9fa;
    transition: all 0.2s ease;
}

.back-link:hover {
    background-color: #e9ecef;
    border-color: #adb5bd;
    color: #2980b9;
}

.back-link i {
    font-size: 14px;
}

/* 메인 컨텐츠 */
.main-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 80px);
    padding: 2rem 1rem;
}

.register-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 2.5rem;
    width: 100%;
    max-width: 500px;
}

.register-title {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #333;
}

/* 폼 스타일 */
.register-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-weight: 500;
    color: #333;
    font-size: 0.9rem;
}

.input-group {
    display: flex;
    position: relative;
}

.form-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: #fff;
}

.form-input:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.form-input.error {
    border-color: #dc3545;
}

.form-input.success {
    border-color: #28a745;
}

/* 중복 확인 버튼 */
.duplicate-check-btn {
    margin-left: 0.5rem;
    padding: 0.75rem 1rem;
    background-color: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.9rem;
    color: #495057;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.duplicate-check-btn:hover {
    background-color: #e9ecef;
    border-color: #adb5bd;
}

.duplicate-check-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.duplicate-check-btn.success {
    background-color: #d4edda;
    border-color: #28a745;
    color: #155724;
}

/* 비밀번호 토글 버튼 */
.password-toggle {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #6c757d;
    cursor: pointer;
    font-size: 1rem;
    transition: color 0.2s;
    z-index: 10;
}

.password-toggle:hover {
    color: #007bff;
}

/* 폼 힌트 */
.form-hint {
    font-size: 0.8rem;
    color: #6c757d;
}

/* 비밀번호 강도 표시 */
.password-strength {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.strength-text {
    font-size: 0.8rem;
    color: #6c757d;
    min-width: 20px;
}

.strength-bar {
    flex: 1;
    height: 10px;
    background-color: #e9ecef;
    border-radius: 9999px;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    background-color: #dc3545;
    transition: width 0.3s, background-color 0.3s;
    width: 0%;
}

.strength-fill.weak {
    background-color: #dc3545;
    width: 33%;
}

.strength-fill.medium {
    background-color: #ffc107;
    width: 66%;
}

.strength-fill.strong {
    background-color: #28a745;
    width: 100%;
}

/* 에러 및 성공 메시지 */
.error-message {
    font-size: 0.8rem;
    color: #dc3545;
    display: none;
}

.error-message.show {
    display: block;
}

.success-message {
    font-size: 0.8rem;
    color: #28a745;
    display: none;
}

.success-message.show {
    display: block;
}

/* 회원가입 버튼 */
.register-submit-btn {
    width: 100%;
    padding: 1rem;
    background-color: #374B5F;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: not-allowed;
    transition: background-color 0.2s;
    margin-top: 1rem;
}

.register-submit-btn:enabled {
    background-color: #007bff;
    cursor: pointer;
}

.register-submit-btn:enabled:hover {
    background-color: #0056b3;
}

/* 로그인 링크 */
.login-link {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: #6c757d;
}

.link {
    color: #4AB2E3;
    text-decoration: none;
    font-weight: 500;
}

.link:hover {
    text-decoration: underline;
}

/* 로딩 오버레이 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

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

.loading-spinner {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    color: #333;
}

.loading-spinner i {
    font-size: 2rem;
    color: #007bff;
    margin-bottom: 1rem;
}

.loading-spinner p {
    margin: 0;
    font-size: 0.9rem;
}

/* 반응형 디자인 */
@media (max-width: 1200px) {
    .header-container {
        padding: 0 16px;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 12px;
        height: 70px;
    }

    .logo-image {
        height: 60px;
        width: 200px;
    }

    .back-link {
        font-size: 14px;
        padding: 6px 12px;
    }

    .main-container {
        padding: 1rem;
        min-height: calc(100vh - 70px);
    }

    .register-card {
        padding: 1.5rem;
        margin: 0;
        border-radius: 8px;
        box-shadow: none;
        border: 1px solid #e9ecef;
    }

    .register-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
}

@media (max-width: 480px) {
    .header-container {
        height: 60px;
        padding: 0 8px;
    }

    .logo-image {
        height: 50px;
        width: 160px;
    }

    .back-link {
        font-size: 13px;
        padding: 5px 8px;
    }

    .main-container {
        min-height: calc(100vh - 60px);
    }

    .register-card {
        padding: 1.5rem;
    }

    .register-form {
        gap: 1.25rem;
    }

    .duplicate-check-btn {
        font-size: 0.8rem;
        padding: 0.6rem 0.8rem;
    }
}