/* 全局样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f8f9fa;
}

/* 侧边栏样式 */
.sidebar {
    position: fixed;
    top: 56px;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 20px 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
}

.sidebar .nav-link {
    color: #333;
    padding: .5rem 1rem;
    border-radius: .25rem;
    margin: 0.2rem 1rem;
}

.sidebar .nav-link:hover {
    background-color: #e9ecef;
}

.sidebar .nav-link.active {
    color: #007bff;
    background-color: #e9ecef;
}

/* 主内容区域样式 */
main {
    padding-top: 1.5rem;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: .5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: #fff;
    border-bottom: 1px solid rgba(0, 0, 0, .125);
    padding: 1rem;
}

/* 表格样式 */
.table th {
    border-top: none;
    background-color: #f8f9fa;
}

/* 设备状态标签 */
.status-badge {
    padding: .25rem .5rem;
    border-radius: .25rem;
    font-size: .875rem;
}

.status-online {
    background-color: #28a745;
    color: #fff;
}

.status-offline {
    background-color: #dc3545;
    color: #fff;
}

.status-maintenance {
    background-color: #ffc107;
    color: #000;
}

/* 表单样式 */
.form-control:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* 按钮样式 */
.btn {
    border-radius: .25rem;
    padding: .375rem .75rem;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}

.btn-primary:hover {
    background-color: #0069d9;
    border-color: #0062cc;
}

/* 登录页面样式 */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 2rem;
    background-color: #fff;
    border-radius: .5rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* 图表容器样式 */
.chart-container {
    position: relative;
    height: 300px;
    margin-bottom: 1.5rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .sidebar {
        position: static;
        height: auto;
        padding-top: 0;
    }
    
    main {
        margin-left: 0 !important;
    }
}