/* 用户界面样式 */
.user-section {
    margin-top: 20px;
    text-align: center;
}

.user-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    color: white;
}

.welcome-text {
    font-size: 1.1rem;
    font-weight: 500;
}

.auth-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 20px 30px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px 15px 0 0;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: white;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.modal-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: 30px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

.form-group small {
    display: block;
    margin-top: 5px;
    color: #666;
    font-size: 0.9rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: 10px;
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 30px;
}

.form-actions .btn {
    padding: 12px 24px;
    font-size: 1rem;
}

/* 移动端响应式 */
@media (max-width: 768px) {
    .user-section {
        margin-top: 15px;
    }
    
    .auth-buttons {
        flex-direction: column;
        gap: 8px;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
}