/* 회원가입 페이지 전용 스타일 - 프리미엄 디자인 */

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

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    min-height: 100vh;
    padding: 40px 20px;
    position: relative;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(197, 165, 114, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(197, 165, 114, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

/* 좌측상단 로고 */
.logo-link {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    display: block;
    transition: all 0.3s ease;
}

.logo-link:hover {
    transform: scale(1.05);
}

.site-logo {
    height: 40px;
    width: auto;
    display: block;
}

.signup-container {
    background: white;
    border-radius: 12px;
    box-shadow: 
        0 8px 24px rgba(0, 0, 0, 0.08),
        0 0 0 1px rgba(197, 165, 114, 0.1);
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.signup-header {
    background: linear-gradient(135deg, #C5A572 0%, #B8985E 100%);
    padding: 48px 48px 40px 48px;
    text-align: center;
    position: relative;
}

.signup-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></svg>');
    opacity: 0.3;
}

.signup-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    position: relative;
}

.signup-header p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
    position: relative;
}

.signup-body {
    padding: 48px;
}

#alert-container {
    margin-bottom: 24px;
}

.alert {
    padding: 16px 20px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
    line-height: 1.6;
    animation: slideIn 0.3s ease-out;
}

.alert-error {
    background: linear-gradient(135deg, #ffebee 0%, #ffcdd2 100%);
    border-left: 4px solid #f44336;
    color: #c62828;
}

.alert-success {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border-left: 4px solid #4caf50;
    color: #2e7d32;
}

@keyframes slideIn {
    from {
        transform: translateY(-10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.form-group {
    margin-bottom: 28px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: #2c2c2c;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.required {
    color: #C5A572;
    font-weight: 700;
}

.optional {
    color: #999;
    font-weight: 400;
    font-size: 11px;
    text-transform: none;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="tel"],
.form-group textarea {
    width: 100%;
    padding: 16px 18px;
    border: 2px solid #e8e8e8;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: #fafafa;
    font-family: inherit;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #C5A572;
    background: white;
    box-shadow: 
        0 0 0 4px rgba(197, 165, 114, 0.1),
        0 4px 12px rgba(197, 165, 114, 0.15);
    transform: translateY(-1px);
}

.form-group small {
    display: block;
    margin-top: 8px;
    font-size: 12px;
    color: #999;
    font-weight: 400;
}

.btn-signup {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, #C5A572 0%, #B8985E 100%);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 
        0 4px 14px rgba(197, 165, 114, 0.4),
        inset 0 -2px 0 rgba(0, 0, 0, 0.1);
    letter-spacing: 1px;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
    margin-top: 12px;
}

.btn-signup::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-signup:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 
        0 8px 24px rgba(197, 165, 114, 0.5),
        inset 0 -2px 0 rgba(0, 0, 0, 0.1);
}

.btn-signup:hover:not(:disabled)::before {
    left: 100%;
}

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

.btn-signup:active:not(:disabled) {
    transform: translateY(0);
}

.login-link {
    text-align: center;
    margin-top: 36px;
    padding-top: 28px;
    border-top: 1px solid #e8e8e8;
    font-size: 14px;
    color: #666;
}

.login-link a {
    color: #C5A572;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    position: relative;
}

.login-link a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #C5A572;
    transition: width 0.3s;
}

.login-link a:hover {
    color: #B8985E;
}

.login-link a:hover::after {
    width: 100%;
}

.back-home {
    text-align: center;
    margin-top: 24px;
}

.back-home a {
    color: #999;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.back-home a:hover {
    color: #C5A572;
    transform: translateX(-4px);
}

/* 반응형 */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }

    .logo-link {
        top: 15px;
        left: 15px;
    }
    
    .site-logo {
        height: 36px;
    }
    
    .signup-container {
        border-radius: 8px;
    }
    
    .signup-header {
        padding: 40px 32px 36px 32px;
    }
    
    .signup-header h1 {
        font-size: 30px;
    }

    .signup-header p {
        font-size: 14px;
    }
    
    .signup-body {
        padding: 36px 32px;
    }

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

    .form-group label {
        font-size: 12px;
        margin-bottom: 8px;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 14px 16px;
        font-size: 14px;
    }

    .form-group textarea {
        min-height: 80px;
    }

    .btn-signup {
        padding: 16px;
        font-size: 14px;
    }

    .login-link {
        padding-top: 24px;
        margin-top: 28px;
    }

    .login-link a {
        font-size: 13px;
    }

    .btn-back {
        padding-top: 24px;
        margin-top: 28px;
    }

    .btn-back a {
        font-size: 13px;
    }
}

@media (max-width: 640px) {
    body {
        padding: 10px;
    }

    .logo-link {
        top: 12px;
        left: 12px;
    }
    
    .site-logo {
        height: 32px;
    }
    
    .signup-container {
        border-radius: 6px;
    }
    
    .signup-header {
        padding: 36px 24px 32px 24px;
    }
    
    .signup-header h1 {
        font-size: 26px;
        margin-bottom: 8px;
    }

    .signup-header p {
        font-size: 13px;
    }
    
    .signup-body {
        padding: 32px 24px;
    }

    .form-group {
        margin-bottom: 18px;
    }

    .form-group label {
        font-size: 11px;
        margin-bottom: 7px;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 12px 14px;
        font-size: 14px;
        border-radius: 6px;
    }

    .form-group textarea {
        min-height: 70px;
    }

    .btn-signup {
        padding: 14px;
        font-size: 13px;
        border-radius: 6px;
    }

    .login-link {
        padding-top: 20px;
        margin-top: 24px;
    }

    .login-link a {
        font-size: 13px;
    }

    .btn-back {
        padding-top: 20px;
        margin-top: 24px;
    }

    .btn-back a {
        font-size: 13px;
        gap: 6px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 8px;
    }

    .signup-container {
        border-radius: 4px;
    }

    .signup-header {
        padding: 32px 20px 28px 20px;
    }

    .signup-header h1 {
        font-size: 24px;
    }

    .signup-header p {
        font-size: 12px;
    }

    .signup-body {
        padding: 28px 20px;
    }

    .form-group {
        margin-bottom: 16px;
    }

    .form-group input,
    .form-group textarea {
        padding: 11px 12px;
        font-size: 13px;
    }

    .form-group textarea {
        min-height: 60px;
    }

    .btn-signup {
        padding: 13px;
        font-size: 12px;
    }

    .login-link {
        padding-top: 18px;
        margin-top: 22px;
    }

    .btn-back {
        padding-top: 18px;
        margin-top: 22px;
    }
}