* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --bg-dark: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border-color: #334155;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

/* 头部 */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.header h1 {
  font-size: 24px;
  font-weight: 600;
}

.header-info {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-secondary);
  animation: pulse 2s infinite;
}

.status-dot.online {
  background: var(--success);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* 统计卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--bg-card);
  padding: 20px;
  border-radius: 12px;
  text-align: center;
}

.stat-card.online {
  border: 1px solid var(--success);
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
}

.stat-card.online .stat-value {
  color: var(--success);
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 5px;
}

/* 主内容区 */
.main-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

/* 面板 */
.panel {
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
  font-size: 16px;
  font-weight: 600;
}

.panel-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.panel-body {
  padding: 15px 20px;
  max-height: 400px;
  overflow-y: auto;
}

/* 按钮 */
.btn {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  background: var(--bg-input);
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

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

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-sm {
  padding: 5px 12px;
  font-size: 12px;
}

.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
}

/* 设备列表 */
.devices-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.device-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  background: var(--bg-input);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.device-item:hover {
  background: var(--border-color);
}

.device-item.selected {
  border: 1px solid var(--primary);
  background: rgba(37, 99, 235, 0.1);
}

.device-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.device-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary);
}

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

.device-id {
  font-weight: 500;
  font-family: monospace;
}

.device-meta {
  font-size: 12px;
  color: var(--text-secondary);
}

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

/* 消息列表 */
.messages-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.message-item {
  padding: 12px;
  background: var(--bg-input);
  border-radius: 8px;
  border-left: 3px solid var(--primary);
}

.message-item.out {
  border-left-color: var(--success);
}

.message-item.in {
  border-left-color: var(--warning);
}

.message-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.message-device {
  font-weight: 500;
  color: var(--primary);
}

.message-type {
  padding: 2px 8px;
  background: var(--bg-dark);
  border-radius: 4px;
  font-size: 11px;
}

.message-content {
  word-break: break-all;
  font-size: 14px;
  line-height: 1.5;
}

.message-content img {
  max-width: 100%;
  max-height: 200px;
  border-radius: 4px;
}

/* 测试面板 */
.test-panel {
  margin-bottom: 20px;
}

.test-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-group label {
  font-size: 14px;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 14px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-group .help-text {
  font-size: 12px;
  color: var(--text-secondary);
}

.form-actions {
  grid-column: span 2;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
}

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 16px;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
}

.modal-body {
  padding: 20px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 15px 20px;
  border-top: 1px solid var(--border-color);
}

/* 选择器 */
select {
  cursor: pointer;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

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

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

/* 响应式 */
@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .test-form {
    grid-template-columns: 1fr;
  }
  
  .form-group.full-width,
  .form-actions {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .header {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
}