/* 登录页面样式 */
.login-container {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-card {
    background: white;
    padding: 3rem;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-header {
    margin-bottom: 2rem;
}

.login-logo {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

.login-title {
    font-size: 2rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: #666;
    margin-bottom: 2rem;
}

.login-form {
    text-align: left;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.2s ease;
    background: #f8f9fa;
}

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

.form-control.error {
    border-color: #e53e3e;
    background: #fef5f5;
}

.error-message {
    color: #e53e3e;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    display: block;
    padding: 0.5rem 0.75rem;
    background: rgba(229, 62, 62, 0.1);
    border-radius: 8px;
    border-left: 4px solid #e53e3e;
    font-weight: 500;
    animation: fadeIn 0.3s ease;
}

.remember-forgot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    font-size: 0.875rem;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #666;
}

.remember-me input {
    width: 16px;
    height: 16px;
}

.forgot-password {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.25rem 0;
}

.forgot-password::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

.forgot-password:hover {
    color: #764ba2;
}

.forgot-password:hover::after {
    width: 100%;
}

.login-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.login-footer {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
}

.register-text {
    color: #666;
    margin-bottom: 1rem;
}

.register-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    background: rgba(102, 126, 234, 0.1);
}

.register-link:hover {
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    transform: translateY(-1px);
}

.social-login {
    margin-top: 1.5rem;
}

.social-title {
    color: #666;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    position: relative;
    text-align: center;
}

.social-title::before,
.social-title::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: #e2e8f0;
}

.social-title::before {
    left: 0;
}

.social-title::after {
    right: 0;
}

.social-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.social-btn {
    padding: 0.875rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.social-btn:hover {
    border-color: #667eea;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.15);
}

.social-icon {
    width: 20px;
    height: 20px;
}

.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 0.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

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

.success-message {
    background: rgba(212, 237, 218, 0.9);
    border: 1px solid #c3e6cb;
    color: #155724;
    padding: 1rem 1.25rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    animation: slideIn 0.4s ease;
}

/* 响应式设计 - 优化版 */
@media (max-width: 768px) {
    .login-container {
        padding: 1rem;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    }
    
    .login-card {
        padding: 2.5rem 2rem;
        margin: 0;
        border-radius: 16px;
        backdrop-filter: blur(8px);
    }
    
    .login-title {
        font-size: 1.8rem;
    }
    
    .login-subtitle {
        font-size: 1rem;
    }
    
    .form-control {
        padding: 0.875rem 1rem;
    }
    
    .remember-forgot {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .social-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .social-btn {
        justify-content: center;
        padding: 0.75rem;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 2rem 1.5rem;
        border-radius: 12px;
    }
    
    .login-title {
        font-size: 1.6rem;
    }
    
    .login-subtitle {
        font-size: 0.95rem;
    }
    
    .form-control {
        padding: 0.75rem 0.875rem;
        font-size: 0.95rem;
    }
    
    .login-btn {
        padding: 1rem;
        font-size: 1rem;
    }
    
    .login-logo {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
    }
}