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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #87CEEB 0%, #4169E1 50%, #1E90FF 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    width: 100%;
    max-width: 400px;
    position: relative;
}

.form-container {
    padding: 40px;
    position: relative;
}

.logo-section {
    margin-bottom: 30px;
}

.logo-placeholder {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 60px;
}

.logo-text {
    font-size: 28px;
    font-weight: 700;
    color: #4169E1;
    letter-spacing: 2px;
}

/* 로고 이미지 스타일 (필요시 사용) */
.logo-image {
    max-height: 50px;
    max-width: 200px;
    object-fit: contain;
}

.form-title {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    text-align: center;
    margin-bottom: 30px;
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
    font-size: 14px;
}

.required {
    color: #e74c3c;
}

.form-input {
    width: 100%;
    padding: 16px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #fff;
}

.form-input:focus {
    outline: none;
    border-color: #4169E1;
    box-shadow: 0 0 0 3px rgba(65, 105, 225, 0.1);
}

.password-container {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: #666;
    font-size: 14px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
}

.checkbox {
    width: 18px;
    height: 18px;
    accent-color: #4169E1;
}

.checkbox-label {
    font-size: 14px;
    color: #666;
    cursor: pointer;
}

.submit-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #4169E1 0%, #1E90FF 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(65, 105, 225, 0.4);
}

.submit-btn:active {
    transform: translateY(0);
}

.divider {
    text-align: center;
    margin: 30px 0;
    position: relative;
    color: #999;
    font-size: 14px;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e9ecef;
    z-index: 1;
}

.divider span {
    background: white;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.social-login {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.social-btn {
    flex: 1;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
}

.social-btn:hover {
    border-color: #4169E1;
    transform: translateY(-1px);
}

.kakao-btn {
    background: #FEE500;
    border-color: #FEE500;
    color: #3C1E1E;
}

.naver-btn {
    background: #03C75A;
    border-color: #03C75A;
    color: white;
}

.google-btn {
    background: #4285F4;
    border-color: #4285F4;
    color: white;
}

.links {
    text-align: center;
    font-size: 14px;
    margin-bottom: 20px;
}

.links a {
    color: #4169E1;
    text-decoration: none;
    margin: 0 8px;
}

.links a:hover {
    text-decoration: underline;
}

.signup-links {
    text-align: center;
    font-size: 14px;
    padding: 20px;
    background: #f8f9fa;
    border-top: 1px solid #e9ecef;
}

.signup-links span {
    color: #666;
    margin-right: 10px;
}

.signup-btn {
    display: inline-block;
    padding: 8px 16px;
    margin: 0 4px;
    background: #4169E1;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 13px;
    transition: all 0.3s ease;
}

.signup-btn:hover {
    background: #1E90FF;
    transform: translateY(-1px);
}

.signup-btn.business {
    background: #28a745;
}

.signup-btn.business:hover {
    background: #218838;
}

.error-message {
    color: #dc3545;
    font-size: 12px;
    margin-top: 4px;
    display: none;
}

/* 애니메이션 */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-container {
    animation: slideIn 0.5s ease;
}

/* 반응형 */
@media (max-width: 480px) {
    .container {
        margin: 10px;
        border-radius: 16px;
    }

    .form-container {
        padding: 30px 20px;
    }

    .form-title {
        font-size: 24px;
    }

    .signup-links {
        padding: 15px;
    }

    .signup-btn {
        display: block;
        margin: 8px 0;
        text-align: center;
    }
}