/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6e8efb, #a777e3);
    padding: 20px;
}

/* 容器样式 */
.container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

/* 登录表单样式 */
.login-form {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    animation: formAppear 0.6s ease-out;
}

/* 标题样式 */
.login-form h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 30px;
    font-size: 28px;
    font-weight: 600;
}

/* 表单组样式 */
.form-group {
    margin-bottom: 20px;
    position: relative;
}

/* 标签样式 */
.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #34495e;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

/* 输入框样式 */
.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    outline: none;
}

.form-group input[type="text"]:focus,
.form-group input[type="password"]:focus {
    border-color: #6e8efb;
    box-shadow: 0 0 0 3px rgba(110, 142, 251, 0.1);
}

/* 复选框容器样式 */
.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 25px;
}

/* 复选框样式 */
.checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.checkbox label {
    margin: 0;
    cursor: pointer;
    font-size: 14px;
    color: #666;
}

/* 按钮样式 */
.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #6e8efb, #4b6ffa);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5d7dfa, #3a5ef9);
    transform: translateY(-1px);
    box-shadow: 0 5px 15px rgba(110, 142, 251, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #a777e3, #8f5ed6);
    color: white;
    margin-top: 10px;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #9666d2, #7e4dc5);
    transform: translateY(-1px);
    box-shadow: 0 5px 15px rgba(167, 119, 227, 0.4);
}

/* 登录链接区域样式 */
.login-link {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.login-link p {
    text-align: center;
    color: #666;
    margin-bottom: 15px;
    font-size: 14px;
}

/* 日志查看功能链接样式 */
.log-link {
    display: inline-block;
    margin: 1rem 0;
    padding: 0.5rem 1rem;
    background-color: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 4px;
}

.log-link:hover {
    background-color: #0056b3;
}

/* 提示框样式 */
.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    animation: alertSlideIn 0.4s ease-out;
}

.alert-error {
    background-color: #fee2e2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #dcfce7;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

/* 动画效果 */
@keyframes formAppear {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* 响应式设计 */
@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .login-form {
        padding: 20px;
    }
    
    .login-form h1 {
        font-size: 24px;
    }
    
    .form-group input[type="text"],
    .form-group input[type="password"] {
        padding: 10px 12px;
    }
    
    .btn {
        padding: 10px;
        font-size: 14px;
    }
}

/* 自适应暗色模式 */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #2c3e50, #3498db);
    }
    
    .login-form {
        background: rgba(30, 41, 59, 0.95);
    }
    
    .login-form h1 {
        color: #e2e8f0;
    }
    
    .form-group label {
        color: #cbd5e1;
    }
    
    .form-group input[type="text"],
    .form-group input[type="password"] {
        background: rgba(30, 41, 59, 0.8);
        border-color: #475569;
        color: #e2e8f0;
    }
    
    .form-group input[type="text"]:focus,
    .form-group input[type="password"]:focus {
        border-color: #6e8efb;
    }
    
    .checkbox label {
        color: #cbd5e1;
    }
    
    .login-link p {
        color: #cbd5e1;
    }
    
    .login-link {
        border-top-color: #475569;
    }
}