/* ============================================================
   Network Topology Configuration Tool — Stylesheet
   清爽蓝调网管风格，桌面端布局
   ============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --blue-900: #0F172A;
  --blue-800: #1E3A5F;
  --blue-700: #1E40AF;
  --blue-600: #2563EB;
  --blue-500: #3B82F6;
  --blue-400: #60A5FA;
  --blue-300: #93C5FD;
  --blue-200: #BFDBFE;
  --blue-100: #DBEAFE;
  --blue-50:  #EFF6FF;

  --bg-body:        #E8EDF2;
  --bg-header:      #1E3A5F;
  --bg-sidebar:     #FFFFFF;
  --bg-canvas:      #D4DCE4;
  --bg-input:       #F8FAFC;
  --bg-input-focus: #FFFFFF;
  --bg-section:     #F1F5F9;
  --bg-hover:       #F8FAFC;

  --text-primary:   #1E293B;
  --text-secondary: #475569;
  --text-muted:     #94A3B8;
  --text-inverse:   #FFFFFF;

  --border-light:   #E2E8F0;
  --border-medium:  #CBD5E1;

  --accent:         #2563EB;
  --accent-light:   #DBEAFE;
  --success:        #10B981;
  --warning:        #F59E0B;
  --danger:         #EF4444;

  --shadow-sm:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg:  0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);

  --header-height:   48px;
  --left-panel-w:    230px;
  --right-panel-w:   290px;

  --font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-mono:   'Cascadia Code', 'Fira Code', 'Consolas', 'Courier New', monospace;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
}

html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font-family);
  font-size: 13px;
  color: var(--text-primary);
  background: var(--bg-body);
}

/* ============================================================
   HEADER / TOOLBAR
   ============================================================ */
#toolbar {
  height: var(--header-height);
  background: linear-gradient(135deg, #1E3A5F 0%, #1a3550 100%);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 6px;
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 100;
  user-select: none;
}

#toolbar .logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-inverse);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-right: 12px;
  white-space: nowrap;
}

#toolbar .logo .icon {
  width: 26px;
  height: 26px;
  background: var(--blue-400);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

#toolbar .toolbar-group {
  display: flex;
  gap: 3px;
}

#toolbar .toolbar-sep {
  width: 1px;
  height: 22px;
  background: rgba(255,255,255,0.18);
  margin: 0 6px;
}

#toolbar button {
  padding: 5px 11px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.08);
  color: var(--text-inverse);
  font-size: 12px;
  font-family: var(--font-family);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 3px;
}

#toolbar button:hover {
  background: rgba(255,255,255,0.16);
  border-color: rgba(255,255,255,0.3);
}

#toolbar button.btn-primary {
  background: var(--blue-500);
  border-color: var(--blue-500);
  font-weight: 500;
}

#toolbar button.btn-primary:hover {
  background: var(--blue-600);
  border-color: var(--blue-600);
}

/* --- Dropdown menu (常用案例) --- */
.dropdown-wrapper {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 4px;
  min-width: 200px;
  background: var(--bg-sidebar);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  overflow: hidden;
}

.preset-item {
  padding: 9px 14px;
  font-size: 12px;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.12s;
  white-space: nowrap;
  border-bottom: 1px solid var(--border-light);
}

.preset-item:last-child {
  border-bottom: none;
}

.preset-item:hover {
  background: var(--accent-light);
  color: var(--accent);
}

/* ============================================================
   MAIN LAYOUT
   ============================================================ */
#main-container {
  display: flex;
  height: calc(100% - var(--header-height));
  overflow: hidden;
}

/* ============================================================
   LEFT PANEL — 分类设备面板
   ============================================================ */
#left-panel {
  width: var(--left-panel-w);
  min-width: var(--left-panel-w);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  z-index: 10;
}

#left-panel .panel-header {
  padding: 10px 14px;
  font-weight: 600;
  font-size: 13px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-section);
  letter-spacing: 0.3px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

#left-panel .panel-header .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue-500);
}

#palette-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

/* 设备分类块 */
.device-category {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 6px;
}

.device-category:last-child {
  border-bottom: none;
}

.category-header {
  padding: 10px 14px 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-sidebar);
}

.cat-icon {
  font-size: 13px;
}

/* HTML5 拖拽设备项 */
.category-items {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 10px 10px;
}

.palette-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  width: 70px;
  padding: 6px 4px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--bg-input);
  cursor: grab;
  transition: all 0.15s;
  user-select: none;
}

.palette-item:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  box-shadow: 0 2px 6px rgba(37,99,235,0.15);
  transform: translateY(-1px);
}

.palette-item:active {
  cursor: grabbing;
  transform: scale(0.95);
}

.palette-item svg {
  flex-shrink: 0;
  pointer-events: none;
}

.palette-item span {
  font-size: 10px;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.2;
  pointer-events: none;
}

/* G6 缩略图 */
.g6-minimap {
  position: absolute;
  bottom: 8px;
  right: 8px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  background: var(--bg-sidebar);
  z-index: 5;
}

/* ============================================================
   CENTER PANEL — 拓扑画布
   ============================================================ */
#center-panel {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg-canvas);
}

#diagram-container {
  width: 100%;
  height: 100%;
  background: var(--bg-canvas);
}

/* ============================================================
   RIGHT PANEL — 参数配置
   ============================================================ */
#right-panel {
  width: var(--right-panel-w);
  min-width: var(--right-panel-w);
  background: var(--bg-sidebar);
  border-left: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  z-index: 10;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* --- Form sections --- */
.form-section {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-light);
}

.form-section:last-child {
  border-bottom: none;
}

.form-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.form-group {
  margin-bottom: 8px;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 3px;
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-family: var(--font-family);
  color: var(--text-primary);
  background: var(--bg-input);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-light);
  background: var(--bg-input-focus);
}

.form-group input:read-only,
.form-group textarea:read-only {
  background: var(--bg-section);
  color: var(--text-secondary);
}

.form-group input:read-only:focus {
  border-color: var(--border-medium);
  box-shadow: none;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%23475569'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 26px;
}

.form-group textarea {
  resize: vertical;
  min-height: 60px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
}

/* Checkbox group */
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 3px 10px;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-primary);
  cursor: pointer;
  margin: 0;
  font-weight: 400;
}

.checkbox-group input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--accent);
  cursor: pointer;
  margin: 0;
}

/* Buttons in right panel */
.btn-generate {
  width: 100%;
  padding: 8px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-family);
  cursor: pointer;
  transition: background 0.15s;
  letter-spacing: 0.2px;
}

.btn-generate:hover {
  background: var(--blue-700);
}

.btn-generate:active {
  background: var(--blue-800);
}

.btn-inline {
  font-size: 11px;
  padding: 3px 8px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--accent);
  cursor: pointer;
  font-family: var(--font-family);
  transition: background 0.12s, border-color 0.12s;
  margin-left: auto;
  white-space: nowrap;
}

.btn-inline:hover {
  background: var(--accent-light);
  border-color: var(--accent);
}

/* --- Connection list --- */
.connection-list {
  max-height: 160px;
  overflow-y: auto;
}

.conn-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  font-size: 12px;
  background: var(--bg-section);
  border-radius: var(--radius-sm);
  margin-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.conn-item:last-child {
  margin-bottom: 0;
}

.conn-port {
  color: var(--accent);
  font-weight: 600;
  min-width: 50px;
}

.conn-arrow {
  color: var(--text-muted);
}

.conn-peer {
  color: var(--text-primary);
}

.conn-empty {
  color: var(--text-muted);
  font-size: 12px;
}

/* --- No-selection placeholder --- */
.no-selection {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 13px;
  padding: 20px;
  text-align: center;
  line-height: 1.6;
}

.no-selection .icon {
  font-size: 32px;
  margin-bottom: 8px;
  opacity: 0.4;
}

/* ============================================================
   STATUS BAR
   ============================================================ */
#statusbar {
  height: 22px;
  background: #1E3A5F;
  color: rgba(255,255,255,0.65);
  font-size: 11px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 16px;
  z-index: 100;
}

#statusbar span {
  white-space: nowrap;
}

/* ============================================================
   SCROLLBARS
   ============================================================ */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ============================================================
   CONTEXT MENU (右键菜单)
   ============================================================ */
.context-menu {
  position: fixed;
  background: var(--bg-sidebar);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  min-width: 160px;
  padding: 4px 0;
  user-select: none;
}

.ctx-item {
  padding: 8px 16px;
  font-size: 12px;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.1s;
  white-space: nowrap;
}

.ctx-item:hover {
  background: var(--accent-light);
  color: var(--accent);
}

.ctx-sep {
  height: 1px;
  background: var(--border-light);
  margin: 4px 0;
}

/* ============================================================
   PORT SELECTION MODAL (端口选择弹窗)
   ============================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal-box {
  background: var(--bg-sidebar);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 580px;
  max-width: 95vw;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-inverse);
  background: var(--bg-header);
  letter-spacing: 0.3px;
}

.modal-body {
  padding: 16px 18px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 12px 18px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  border-top: 1px solid var(--border-light);
  background: var(--bg-section);
}

.modal-footer button {
  padding: 7px 20px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: var(--font-family);
  cursor: pointer;
  border: 1px solid var(--border-medium);
  background: var(--bg-sidebar);
  color: var(--text-primary);
  transition: background 0.12s;
}

.modal-footer button:hover {
  background: var(--bg-hover);
}

.modal-footer button.btn-primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.modal-footer button.btn-primary:hover {
  background: var(--blue-700);
}

.port-select-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.port-select-col {
  flex: 1;
  min-width: 0;
}

.port-select-arrow {
  font-size: 24px;
  padding-top: 24px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.port-col-title {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-light);
}

.port-col-title strong {
  color: var(--text-primary);
}

.port-list-scroll {
  max-height: 240px;
  overflow-y: auto;
}

.port-cat-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 6px 0 4px;
  letter-spacing: 0.3px;
}

.port-option {
  display: block;
  padding: 4px 8px;
  margin: 1px 0;
  border-radius: var(--radius-sm);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.1s;
  user-select: none;
}

.port-option:hover {
  background: var(--accent-light);
}

.port-option input[type="radio"] {
  margin-right: 6px;
  accent-color: var(--accent);
}

.port-option.port-used {
  color: var(--text-muted);
  text-decoration: line-through;
  cursor: not-allowed;
  opacity: 0.6;
}

.port-option.port-used:hover {
  background: transparent;
}

.port-option.port-used input[type="radio"] {
  opacity: 0.5;
  pointer-events: none;
}

/* ============================================================
   LINK TYPE SELECTOR (网线/光纤切换)
   ============================================================ */
.link-type-group {
  display: flex;
  gap: 6px;
  padding: 6px 10px 10px;
}

.link-type-btn {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  font-size: 11px;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.12s;
  text-align: center;
}

.link-type-btn:hover {
  background: var(--accent-light);
  border-color: var(--accent);
}

.link-type-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  font-weight: 600;
}

/* ============================================================
   G6 BRUSH SELECT (框选矩形)
   ============================================================ */
.g6-component-brush {
  border: 1px dashed #3B82F6 !important;
  background: rgba(59,130,246,0.08) !important;
}

/* ============================================================
   TERMINAL MODAL — 批量命令输出 (黑底白字终端)
   ============================================================ */
.terminal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 3000;
  align-items: center;
  justify-content: center;
}

.terminal-box {
  background: #0C1117;
  border: 1px solid #30363D;
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  width: 85vw;
  max-width: 1100px;
  height: 82vh;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: #161B22;
  border-bottom: 1px solid #30363D;
  flex-shrink: 0;
}

.terminal-title {
  font-size: 14px;
  font-weight: 600;
  color: #E6EDF3;
  letter-spacing: 0.3px;
}

.terminal-actions {
  display: flex;
  gap: 8px;
}

.terminal-actions button {
  padding: 5px 14px;
  border: 1px solid #30363D;
  border-radius: 6px;
  background: #21262D;
  color: #C9D1D9;
  font-size: 12px;
  font-family: 'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  cursor: pointer;
  transition: all 0.12s;
}

.terminal-actions button:hover {
  background: #30363D;
  border-color: #58A6FF;
  color: #E6EDF3;
}

.terminal-body {
  flex: 1;
  overflow: auto;
  margin: 0;
  padding: 20px 24px;
  background: #0C1117;
  color: #E6EDF3;
  font-family: 'Cascadia Code','Fira Code','Consolas','Courier New',monospace;
  font-size: 13px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-all;
  tab-size: 2;
}

/* 命令注释 (紫色) */
.terminal-body .t-comment { color: #8B949E; }
/* 命令行 (绿色) */
.terminal-body .t-cmd { color: #7EE787; }
/* 功能标签 (黄色) */
.terminal-body .t-header { color: #F0C000; }

/* ============================================================
   VLAN SECTION — 三层交换机 VLAN 配置区段 (醒目样式)
   ============================================================ */
#vlan-section {
  background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
  border: 1px solid #BFDBFE;
  border-radius: var(--radius-md);
  margin: 6px 10px;
  padding: 10px 12px !important;
}

#vlan-section .form-section-title {
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 6px;
}

#vlan-section .btn-inline {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  font-weight: 600;
  padding: 4px 10px;
  font-size: 12px;
}

#vlan-section .btn-inline:hover {
  background: var(--blue-700);
}

/* VLAN 区段默认隐藏, JS 通过切换 .vlan-visible 控制 */
.vlan-section-cls { display: none; }
.vlan-section-cls.vlan-visible { display: block; }

/* 红色告警提示 */
.vlan-alert {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  margin-bottom: 8px;
  font-size: 12px;
  color: #DC2626;
  font-weight: 600;
  line-height: 1.5;
}

/* ============================================================
   VLAN BATCH EDIT TABLE
   ============================================================ */
.vlan-summary {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.vlan-table-wrap {
  max-height: 420px;
  overflow-y: auto;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
}

.vlan-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.vlan-table thead {
  position: sticky;
  top: 0;
  z-index: 1;
}

.vlan-table th {
  background: var(--bg-section);
  padding: 7px 8px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border-medium);
  font-size: 11px;
  white-space: nowrap;
}

.vlan-table td {
  padding: 4px 6px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

.vlan-table input {
  width: 100%;
  padding: 4px 6px;
  border: 1px solid var(--border-medium);
  border-radius: 3px;
  font-size: 12px;
  font-family: var(--font-family);
  outline: none;
  box-sizing: border-box;
}

.vlan-table input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-light);
}

.vlan-table .id-col input { width: 48px; text-align: center; }
.vlan-table .name-col input { width: 80px; }
.vlan-table .desc-col input { width: 100px; }
.vlan-table .ip-col input { width: 110px; font-family: var(--font-mono); }
.vlan-table .mask-col input { width: 100px; font-family: var(--font-mono); }
.vlan-table .act-col { width: 32px; text-align: center; }

.vlan-table .del-row-btn {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px;
  line-height: 1;
}
.vlan-table .del-row-btn:hover { background: #FEE2E2; border-radius: 3px; }

.btn-small {
  padding: 5px 12px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--accent-light);
  color: var(--accent);
  font-size: 12px;
  font-family: var(--font-family);
  cursor: pointer;
  transition: background 0.12s;
}
.btn-small:hover { background: var(--accent); color: white; }

/* ============================================================
   DONATE BOX (左侧打赏区)
   ============================================================ */
.donate-box {
  padding: 8px 10px 10px;
  text-align: center;
}

.donate-text {
  font-size: 10px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 8px 0;
}

.donate-qr {
  width: 100%;
  max-width: 210px;
  height: 160px;
  margin: 0 auto;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.donate-qr img {
  width: 320px;
  height: 234px;
  transform: scale(0.68);
  transform-origin: center center;
}

/* 关于弹窗中的二维码 (实际大小) */
.about-qr {
  width: 471px;
  height: 344px;
  margin: 10px auto 0;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.about-qr img {
  width: 471px;
  height: 344px;
  object-fit: contain;
}

/* 左侧 QR 悬停弹出层 */
.donate-hover-popup {
  display: none;
  position: fixed;
  left: 240px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5000;
  background: white;
  border: 2px solid var(--border-medium);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
}

.donate-hover-popup img {
  width: 471px;
  height: 344px;
  display: block;
}

.donate-hover-popup .popup-close {
  position: absolute;
  top: -10px;
  right: -10px;
  width: 22px;
  height: 22px;
  background: var(--danger);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================================
   DEVICE PROPERTIES MODAL (设备属性弹窗)
   ============================================================ */
.props-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.props-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.props-row label {
  width: 80px;
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: right;
}

.props-row input,
.props-row select {
  flex: 1;
  padding: 6px 10px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-family: var(--font-family);
  color: var(--text-primary);
  background: var(--bg-input);
  outline: none;
}

.props-row input:focus,
.props-row select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-light);
}

.props-row input:read-only {
  background: var(--bg-section);
  color: var(--text-secondary);
}

#props-layer { display: none; }
#props-layer.show { display: inline-block; }