/* 全局样式 */
:root {
    --primary-color: #3DBAA2;
    --secondary-color: #2A9D8F;
    --success-color: #06D6A0;
    --warning-color: #FFD166;
    --danger-color: #EF476F;
    --info-color: #118AB2;
    --dark-color: #073B4C;
    --light-gray: #F8F9FA;
    --border-color: #DEE2E6;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-gray);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container-fluid {
    flex: 1;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%) !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.2rem;
}

.navbar-brand i {
    font-size: 1.5rem;
}

.nav-link {
    transition: all 0.3s ease;
    border-radius: 5px;
    margin: 0 5px;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: 600;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
    transform: translateY(-2px);
}

.card-header {
    background-color: white;
    border-bottom: 2px solid var(--primary-color);
    font-weight: 600;
    padding: 1rem 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

/* 统计卡片 */
.stat-card {
    text-align: center;
    padding: 1.5rem;
    border-radius: 10px;
    color: white;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(45deg);
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin: 0.5rem 0;
}

.stat-card .stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

.stat-card .stat-change {
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.stat-card.bg-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
}

.stat-card.bg-success {
    background: linear-gradient(135deg, var(--success-color), var(--primary-color));
}

.stat-card.bg-warning {
    background: linear-gradient(135deg, var(--warning-color), #FFA500);
}

.stat-card.bg-danger {
    background: linear-gradient(135deg, var(--danger-color), #DC143C);
}

/* 血糖值颜色 */
.glucose-low {
    color: var(--danger-color);
    font-weight: 600;
}

.glucose-normal {
    color: var(--success-color);
    font-weight: 600;
}

.glucose-high {
    color: var(--warning-color);
    font-weight: 600;
}

.glucose-very-high {
    color: var(--danger-color);
    font-weight: 600;
}

/* 血糖趋势图标 */
.trend-icon {
    font-size: 1.5rem;
    vertical-align: middle;
}

/* 表格样式 */
.table {
    background-color: white;
}

.table thead th {
    background-color: var(--light-gray);
    border-bottom: 2px solid var(--primary-color);
    font-weight: 600;
    color: var(--dark-color);
}

.table-hover tbody tr:hover {
    background-color: rgba(61, 186, 162, 0.05);
}

/* 按钮样式 */
.btn {
    border-radius: 5px;
    padding: 0.5rem 1.2rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(61, 186, 162, 0.3);
}

.btn-success {
    background-color: var(--success-color);
    border: none;
}

.btn-warning {
    background-color: var(--warning-color);
    border: none;
    color: var(--dark-color);
}

.btn-danger {
    background-color: var(--danger-color);
    border: none;
}

/* 徽章样式 */
.badge {
    padding: 0.4rem 0.8rem;
    border-radius: 5px;
    font-weight: 500;
}

/* 设备卡片 */
.device-card {
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.device-card:hover {
    border-left-color: var(--secondary-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.device-status {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 5px;
}

.device-status.active {
    background-color: var(--success-color);
    box-shadow: 0 0 8px var(--success-color);
}

.device-status.inactive {
    background-color: #CCC;
}

/* 图表容器 */
.chart-container {
    background-color: white;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* 筛选器样式 */
.filter-panel {
    background-color: white;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-bottom: 20px;
}

.filter-panel .form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

/* 分页样式 */
.pagination {
    margin-top: 1.5rem;
}

.page-link {
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    margin: 0 3px;
}

.page-link:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 页脚样式 */
.footer {
    background: linear-gradient(135deg, var(--dark-color) 0%, #0A5568 100%);
    margin-top: auto;
}

.footer h6 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer a:hover {
    color: var(--primary-color) !important;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(61, 186, 162, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 模态框样式 */
.modal-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

/* 表单样式 */
.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(61, 186, 162, 0.25);
}

/* 警告框样式 */
.alert {
    border-radius: 8px;
    border: none;
}

.alert-success {
    background-color: rgba(6, 214, 160, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background-color: rgba(255, 209, 102, 0.1);
    color: #CC8800;
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background-color: rgba(239, 71, 111, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-info {
    background-color: rgba(17, 138, 178, 0.1);
    color: var(--info-color);
    border-left: 4px solid var(--info-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .stat-card {
        margin-bottom: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .navbar-brand span {
        font-size: 1rem;
    }
}

/* 登录页面样式 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.login-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    overflow: hidden;
    max-width: 400px;
    width: 100%;
}

.login-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem;
    text-align: center;
}

.login-header i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.login-body {
    padding: 2rem;
}

/* 进度条 */
.progress {
    height: 8px;
    border-radius: 4px;
    background-color: var(--light-gray);
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
}

/* 工具提示 */
.tooltip-inner {
    background-color: var(--dark-color);
    border-radius: 5px;
}

.tooltip.bs-tooltip-top .tooltip-arrow::before {
    border-top-color: var(--dark-color);
}

/* 下拉菜单 */
.dropdown-menu {
    border: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border-radius: 8px;
}

.dropdown-item:hover {
    background-color: rgba(61, 186, 162, 0.1);
    color: var(--primary-color);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: #999;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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