/* 로그인 페이지 스타일 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 12px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1), 0 5px 15px rgba(0, 0, 0, 0.07);
    padding: 40px;
    animation: slideIn 0.5s ease-out;
}

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

.login-header {
    text-align: center;
    margin-bottom: 35px;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}

.login-header p {
    color: #666;
    font-size: 16px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #555;
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    border: 2px solid #e1e4e8;
    border-radius: 8px;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder {
    color: #a0a0a0;
}

.form-options {
    margin-bottom: 25px;
}

.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
    color: #666;
    user-select: none;
}

.checkbox-container input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #e1e4e8;
    border-radius: 4px;
    margin-right: 8px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-container input:checked ~ .checkmark {
    background: #667eea;
    border-color: #667eea;
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.btn-login {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);
}

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

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.error-message {
    margin-top: 20px;
    padding: 12px 16px;
    background: #fee;
    border: 1px solid #fcc;
    border-radius: 8px;
    color: #c33;
    font-size: 14px;
    text-align: center;
    animation: shake 0.5s ease-in-out;
}

.success-message {
    margin-top: 20px;
    padding: 12px 16px;
    background: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: 8px;
    color: #155724;
    font-size: 14px;
    text-align: center;
    animation: fadeIn 0.3s ease-in;
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.login-footer {
    margin-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

/* 개발모드 정보 */
.dev-mode-info {
    margin-top: 30px;
    padding: 20px;
    background: #f0f8ff;
    border: 1px solid #b0d4ff;
    border-radius: 8px;
    text-align: center;
}

.dev-mode-info h3 {
    font-size: 16px;
    color: #0066cc;
    margin-bottom: 10px;
}

.dev-mode-info p {
    font-size: 14px;
    color: #666;
    margin-bottom: 10px;
}

.dev-mode-info button {
    padding: 8px 16px;
    background: #0066cc;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s ease;
}

.dev-mode-info button:hover {
    background: #0052a3;
}

/* 반응형 디자인 */
@media (max-width: 480px) {
    .login-container {
        padding: 10px;
    }
    
    .login-box {
        padding: 30px 20px;
    }
    
    .login-header h1 {
        font-size: 24px;
    }
    
    .form-group input {
        font-size: 16px;
        padding: 10px 14px;
    }
}