:root {
    --border-color: #ccc;
    --background-color: #f4f4f4;
    --sidebar-width: 300px;
    --sidebar-collapsed-width: 40px;
}
body, html {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    height: 100vh;
    overflow: hidden;
    background-color: var(--background-color);
}
.container {
    display: flex;
    height: 100%;
}
/* Sidebar (Left Panel) */
.sidebar {
    width: var(--sidebar-width);
    height: 100%;
    border-right: 1px solid var(--border-color);
    box-sizing: border-box;
    transition: width 0.3s ease;
    background: #fff;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}
.sidebar-content {
    flex-grow: 1;
    padding: 10px 15px 10px 10px; /* Reduce right padding to give more space for content */
    opacity: 1;
    transition: opacity 0.3s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden; /* Prevent parent from scrolling */
    width: 100%;
    box-sizing: border-box;
}
.sidebar.collapsed .sidebar-content {
    opacity: 0;
    pointer-events: none;
}

/* Sidebar Tabs */
.sidebar-tab-bar {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    padding: 5px 5px 0 5px; /* Create space for tabs, but no bottom padding */
    gap: 2px; /* Small gap between tabs */
    flex-shrink: 0;
}
.sidebar-tab-btn {
    padding: 8px 12px;
    cursor: pointer;
    border: 1px solid transparent;
    border-bottom: none;
    background-color: #e9ecef; /* Inactive tab color from sub-tab style */
    color: #333;
    display: flex;
    align-items: center;
    justify-content: center; /* Center content within the tab */
    gap: 8px;
    font-size: 0.9em;
    border-radius: 4px 4px 0 0; /* Match sub-tab style */
    flex-grow: 1; /* Allow tabs to share space equally */
    transition: background-color 0.2s ease, color 0.2s ease;
    position: relative;
}
.sidebar-tab-btn:hover {
    background-color: #f8f9fa; /* A very light hover, close to white */
}
.sidebar-tab-btn.active {
    background-color: #fff; /* Active tab blends with content area */
    border-color: var(--border-color);
    border-bottom: 1px solid #fff; /* Hide the bottom border segment */
    margin-bottom: -1px; /* Overlap the container's bottom border */
    color: #007bff; /* Use primary color for active text */
    font-weight: bold;
}
.sidebar-tab-content {
    flex-grow: 1;
    overflow-y: auto;
    overflow-x: hidden; /* Prevent horizontal scrolling */
    min-height: 0;
    width: 100%; /* Ensure content fits within sidebar width */
    box-sizing: border-box;
    padding-right: 20px; /* Add padding to prevent content from touching the scrollbar */
}
.sidebar-tab-pane {
    display: none;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden; /* Prevent horizontal scrolling */
}
.sidebar-tab-pane.active {
    display: block;
}
.toggle-btn {
    position: absolute;
    top: 50%;
    right: -20px;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: flex-start; /* 将图标靠左对齐 */
    padding-left: 2px; /* 进一步微调图标，使其更靠左 */
    z-index: 100;
    box-sizing: border-box; /* 确保内边距包含在宽度内 */
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2); /* 增强阴影效果 */
    color: #007bff;
    transition: all 0.2s ease;
}
.toggle-btn:hover {
    background: #f0f0f0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25); /* 增强悬停阴影效果 */
    transform: translateY(-50%) scale(1.05);
}
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; font-weight: bold; }
.form-group input, .form-group select, .form-group button {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.button-group {
    display: flex;
    gap: 8px;
    align-items: center;
    width: 100%;
    box-sizing: border-box;
}
.button-group > button {
    white-space: nowrap;
    box-sizing: border-box;
}

.button-group > #connect-btn {
    flex: 1; /* Connect button takes remaining space */
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

.button-group > #restore-defaults-btn {
    flex: none; /* Reset button only takes space it needs */
    width: auto;
}
#restore-defaults-btn {
    background-color: #6c757d;
    border-color: #6c757d;
}
#restore-defaults-btn:hover {
    background-color: #5a6268;
}
.device-name-display {
    padding: 8px;
    background-color: #e9ecef;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    color: #495057;
    font-family: monospace;
    min-height: 1.2em; /* Ensure it has height even when empty */
}
button { cursor: pointer; background-color: #007bff; color: white; border-color: #007bff; }
button:hover { background-color: #0056b3; }
#connect-btn.connected, #ws-connect-btn.connected, #ble-connect-btn.connected { background-color: #dc3545; border-color: #dc3545; }
#status { font-weight: bold; }
#status.connected, #status-icon.connected { color: #28a745; }
#status.disconnected, #status-icon.disconnected { color: #dc3545; }

#status-icon {
    flex-shrink: 0; /* 防止图标在flex布局中被压缩 */
    width: 16px; /* 为图标设置固定宽度 */
    text-align: center; /* 确保图标在其容器内居中 */
}

details > summary { cursor: pointer; font-weight: bold; }

.sidebar-banner {
    text-align: center;
    padding: 20px 10px 10px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    position: relative;
}
.sidebar-banner svg {
    color: #007bff;
}

.sidebar-status-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-top: 1px solid var(--border-color);
    background-color: #f7f7f7;
    font-size: 0.9em;
    flex-shrink: 0;
    white-space: nowrap; /* 防止文字换行 */
    overflow: hidden; /* 隐藏溢出的内容 */
}
.sidebar-status-bar #status {
    /* margin-left is replaced by the container's gap property */
}

.sidebar-status-bar .status-label,
.sidebar-status-bar #status {
    transition: max-width 0.2s ease-out, opacity 0.1s linear;
    max-width: 200px; /* 增加宽度以适应更长的状态文本 */
    overflow: hidden; /* 配合max-width技巧隐藏溢出内容 */
}

.sidebar.collapsed .sidebar-status-bar {
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
    gap: 0; /* 折叠时移除间隙以确保精确居中 */
}

.sidebar.collapsed .sidebar-status-bar .status-label,
.sidebar.collapsed .sidebar-status-bar #status {
    /* display: none; 被移除以允许平滑过渡 */
    max-width: 0;
    opacity: 0;
}

/* Main Content (Right Panel) */
.main-content {
    flex-grow: 1;
    padding: 10px 10px 10px 0; /* Remove left padding to make tabs flush with sidebar */
    display: flex;
    flex-direction: column;
    min-height: 0; /* 关键修复：确保主内容区域在 flex 布局中可以正确收缩 */
    box-sizing: border-box;
    background-color: #fff; /* Make main content area white to match sidebar */
}
/* Main Tabs */
.tab-bar {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    gap: 2px;
    padding-left: 10px; /* Add padding to keep tab buttons aligned */
    position: relative;
}
.tab-btn {
    padding: 10px 15px;
    cursor: pointer;
    border: 1px solid transparent;
    border-bottom: none;
    background-color: #e9ecef; /* Inactive tab color */
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
    border-radius: 4px 4px 0 0;
    transition: background-color 0.2s ease, color 0.2s ease;
    position: relative;
}
.tab-btn:hover {
    background-color: #f8f9fa;
}
.tab-btn.active {
    background-color: #fff; /* Active tab blends with content area */
    border-color: var(--border-color);
    border-bottom: 1px solid #fff; /* Hide the bottom border segment */
    margin-bottom: -1px; /* Overlap the container's bottom border */
    font-weight: bold;
}
.tab-btn.active i {
    color: #28a745; /* Make the icon green when active */
}
.sidebar-banner .lang-switcher-container {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    align-items: center;
    z-index: 10;
}

.sidebar.collapsed .sidebar-banner .lang-switcher-container {
    opacity: 0;
    pointer-events: none;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--text-secondary);
}

.lang-option {
    padding: 2px 6px;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.lang-option:hover {
    background-color: var(--hover-color);
    color: var(--text-primary);
}

.lang-option.active {
    background-color: var(--primary-color);
    color: white;
}

.lang-option.inactive {
    opacity: 0.6;
}

.lang-separator {
    color: var(--text-secondary);
    margin: 0 2px;
}

.lang-switcher-container select {
    padding: 5px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}
.tab-content {
    flex-grow: 1;
    display: grid;
    min-height: 0;
    padding-left: 10px; /* Add padding here to keep content aligned */
}
.tab-pane {
    display: none;
    grid-area: 1 / 1; /* 将所有窗格堆叠在同一个网格单元格中 */
    min-height: 0; /* 允许窗格根据其内容需要进行收缩 */
    overflow: auto; /* 为简单的窗格在内容溢出时启用滚动 */
}
.tab-pane.active { display: flex; flex-direction: column; }

/* Parameter Config Tab Layout */
#param-config.active {
    display: flex;
    flex-direction: column;
    overflow: hidden; /* 此窗格在内部管理自己的滚动 */
}
.param-config-layout { display: flex; flex-grow: 1; }
.controls-panel {
    width: 250px;
    padding: 15px;
    border-right: 1px solid var(--border-color);
    background-color: #fff;
    box-sizing: border-box;
    position: relative; /* For positioning the collapse button */
    flex-shrink: 0;
}
.param-config-layout.controls-collapsed .controls-panel {
    display: none;
}
.panel-toggle-btn {
    border: 1px solid var(--border-color);
    background-color: #f7f7f7;
    cursor: pointer;
    color: #555;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.panel-toggle-btn:hover {
    background-color: #e9e9e9;
}
#collapse-controls-btn {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    margin-right: 4px;
}
.param-config-layout.controls-collapsed #collapse-controls-btn {
    display: none;
}
#expand-controls-btn {
    display: none; /* Hidden by default */
    width: 28px;
    height: 28px;
    border-radius: 4px;
    margin-right: 4px;
}
.param-config-layout.controls-collapsed #expand-controls-btn {
    display: flex;
}
.data-display-panel { flex-grow: 1; display: flex; flex-direction: column; min-width: 0; /* Fix for flexbox overflow */ }
/* Data Display Sub-tabs */
.sub-tab-bar {
    display: flex;
    justify-content: flex-start; /* 确保标签靠左对齐 */
    align-items: center; /* 垂直居中对齐所有子元素 */
    padding: 0 10px;
    border-bottom: 1px solid var(--border-color);
    margin-top: 10px; /* Add space above the sub-tabs for better separation */
}
.sub-tab-btn {
    padding: 8px 12px;
    cursor: pointer;
    border: 1px solid transparent;
    border-bottom: none;
    background-color: #e9ecef; /* 为非活动标签添加背景色 */
    color: #333;
    border-radius: 4px 4px 0 0;
    margin-right: 2px;
    position: relative;
}
#param-config.active .sub-tab-btn.active {
    background-color: #fff; /* 活动标签背景与内容区一致 */
    border-color: var(--border-color);
    border-bottom: 1px solid #fff;
    margin-bottom: -1px; /* 覆盖父容器的下边框，实现无缝连接 */
}
#param-config.active .sub-tab-btn.active::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: #28a745;
    border-radius: 50%;
    margin-right: 8px;
    vertical-align: middle;
}
.sub-tab-pane {
    display: none;
    min-height: 0;
    flex-direction: column;
    flex-grow: 1; /* Take up all available space in the parent flex container */
}
.sub-tab-pane.active {
    display: flex;
}

/* Text View */
#text-view {
    padding: 10px;
    box-sizing: border-box;
}
.text-view-options { margin-bottom: 10px; display: flex; align-items: center; gap: 15px;}

.copy-btn {
    padding: 8px 15px;
    background-color: #6c757d;
    border: 1px solid #6c757d;
    border-radius: 4px;
    /* margin-left: auto; is now handled by the record button */
    display: flex;
    align-items: center;
    gap: 6px;
}

.copy-btn:hover {
    background-color: #5a6268;
}

.record-btn {
    padding: 8px 15px;
    background-color: #17a2b8;
    border: 1px solid #17a2b8;
    border-radius: 4px;
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
}

.record-btn.recording {
    background-color: #dc3545;
    border-color: #dc3545;
}

.record-btn:hover {
    opacity: 0.9;
}

.clear-btn {
    padding: 8px 15px;
    background-color: #ffc107;
    border: 1px solid #ffc107;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: #212529;
}

.clear-btn:hover {
    background-color: #e0a800;
    border-color: #d39e00;
}

#received-data {
    width: 100%;
    flex: 1 1 0;
    overflow-y: auto;
    overflow-x: hidden;
    box-sizing: border-box;
    border: 1px solid var(--border-color);
    padding: 8px;
    background-color: #fff;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.9em;
    white-space: pre-wrap;
    word-break: break-all;
    min-height: 0;
    max-height: calc(100% - 60px); /* Reserve space for send-container */
}

/* Override received-data component styles for main container */
#received-data.received-data-container {
    height: auto;
    max-height: calc(100% - 60px);
    border-radius: 0;
}

/* 高亮数据部分的样式 */
.data-timestamp {
    color: #888;
    margin-right: 8px;
    user-select: none;
}
.data-rx {
    color: #28a745;
    font-weight: bold;
    user-select: none;
}
.data-tx {
    color: #007bff;
    font-weight: bold;
    user-select: none;
}
.data-header {
    background-color: #ffe8cc;
    padding: 1px 3px;
    border-radius: 3px;
}
.data-payload {
    background-color: #f0f0f0;
    padding: 1px 3px;
    border-radius: 3px;
}
.data-checksum {
    background-color: #d4f1f4;
    padding: 1px 3px;
    border-radius: 3px;
}
.data-highlight {
    background-color: orange;
    padding: 1px 3px;
    border-radius: 3px;
    color: white;
}
.send-container {
    display: flex;
    margin-top: 10px;
    flex-shrink: 0; /* Prevent send-container from shrinking */
    position: sticky;
    bottom: 0;
    background-color: #fff;
    padding-top: 5px;
}

.send-container input, .send-container button {
    padding: 8px;
    box-sizing: border-box;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

#send-input { flex-grow: 1; }
#send-btn { width: 80px; margin-left: 10px; }

/* Chart View */
#chart-view {
    padding: 10px;
    box-sizing: border-box;
    position: relative; /* 用于绝对定位子元素 */
    flex-grow: 1;
    min-height: 0; /* 允许在flex容器中收缩 */
}

.chart-tool-btn {
    position: absolute;
    top: 15px;
    width: 32px;
    height: 32px;
    padding: 0;
    font-size: 1em; /* 调整图标大小 */
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    z-index: 10;
    background-color: #6c757d;
    border-color: #6c757d;
}

.chart-tool-btn.active {
    background-color: #17a2b8;
    border-color: #17a2b8;
}

.chart-tool-btn:not(.active):hover {
    background-color: #5a6268;
}

.chart-tool-btn.active:hover {
    opacity: 0.9;
}

#toggle-legend-btn {
    left: 20px;
}

#toggle-pause-btn {
    left: 62px;
}

#screenshot-btn {
    left: 104px;
}

#clear-chart-btn {
    left: 146px;
}

#myChart {
    flex-grow: 1;
    min-height: 0;
    width: 100%;
}

/* Styles for Firmware and Factory Config Tabs */
.config-section {
    padding: 20px;
}

.form-group-inline {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.form-group-inline label {
    font-weight: bold;
    width: 120px;
    flex-shrink: 0;
}

.form-group-inline input[type="text"],
.form-group-inline input[type="date"] {
    flex-grow: 1;
    width: auto;
    padding: 8px;
    box-sizing: border-box;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.form-group-inline button {
    width: auto;
    padding: 8px 15px;
    box-sizing: border-box;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

#download-progress {
    width: 100%;
}

/* Notification Animation */
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 400px;
}

.modal-content h4 {
    margin-top: 0;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

.btn-secondary {
    background-color: #6c757d;
    border: 1px solid #6c757d;
    padding: 8px 15px;
    border-radius: 4px;
}

.btn-danger {
    background-color: #dc3545;
    border: 1px solid #dc3545;
    padding: 8px 15px;
    border-radius: 4px;
}