/* 现代化全局样式 */
:root {
  /* 字体系统 */
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  font-weight: 400;

  /* 颜色系统 */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary-color: #667eea;
  --primary-dark: #5a67d8;
  --secondary-color: #764ba2;

  --success-color: #48bb78;
  --warning-color: #ed8936;
  --error-color: #f56565;
  --info-color: #4299e1;

  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-light: #a0aec0;

  --bg-primary: #ffffff;
  --bg-secondary: #f7fafc;
  --bg-tertiary: #edf2f7;
  --bg-overlay: rgba(255, 255, 255, 0.95);

  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);

  /* 间距系统 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-2xl: 24px;
  --spacing-3xl: 32px;

  /* 圆角系统 */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;

  /* 动画 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* 字体渲染优化 */
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}

/* 重置样式 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  padding: 0;
  width: 400px;
  min-height: 500px;
  max-height: 600px;
  overflow: hidden;
  font-family: inherit;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

#app {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

/* 链接样式 */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

/* 按钮基础样式重置 */
button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  border: none;
  background: none;
  cursor: pointer;
  transition: all var(--transition-normal);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

/* 输入框基础样式 */
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

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

/* 选择文本样式 */
::selection {
  background: rgba(102, 126, 234, 0.2);
  color: var(--text-primary);
}

/* 焦点可见性 */
:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* 动画关键帧 */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* 响应式断点 */
@media (max-width: 420px) {
  :root {
    --spacing-xs: 3px;
    --spacing-sm: 6px;
    --spacing-md: 10px;
    --spacing-lg: 14px;
    --spacing-xl: 18px;
    --spacing-2xl: 22px;
    --spacing-3xl: 28px;
  }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --text-muted: #000000;
  }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Enhanced Connection Status Display */
.connection-status-display {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.status-indicator {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.status-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: bold;
  flex-shrink: 0;
  transition: all var(--transition-normal);
}

.status-icon.status-connected {
  background: var(--success-color);
  color: white;
}

.status-icon.status-connecting {
  background: var(--warning-color);
  color: white;
}

.status-icon.status-disconnected {
  background: var(--text-muted);
  color: white;
}

.status-icon.status-error {
  background: var(--error-color);
  color: white;
}

.status-details {
  flex: 1;
  min-width: 0;
}

.status-text-primary {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.status-error {
  font-size: 14px;
  color: var(--error-color);
  margin-bottom: var(--spacing-xs);
  word-wrap: break-word;
}

.status-info {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

.status-info:last-child {
  margin-bottom: 0;
}

/* Loading Spinner */
.loading-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s linear infinite;
}

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

/* Enhanced Connect Button States */
.connect-button--connected {
  background: var(--success-color) !important;
}

.connect-button--connected:hover:not(:disabled) {
  background: #38a169 !important;
}

.connect-button--connecting {
  background: var(--warning-color) !important;
  position: relative;
  overflow: hidden;
}

.connect-button--connecting::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  animation: shimmer 1.5s infinite;
}

.connect-button--error {
  background: var(--error-color) !important;
}

.connect-button--error:hover:not(:disabled) {
  background: #e53e3e !important;
}

@keyframes shimmer {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Error Actions and Help */
.error-actions {
  margin-top: var(--spacing-sm);
  display: flex;
  gap: var(--spacing-sm);
}

.retry-button,
.help-button {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.retry-button:hover:not(:disabled) {
  background: var(--info-color);
  color: white;
  border-color: var(--info-color);
}

.help-button:hover {
  background: var(--warning-color);
  color: white;
  border-color: var(--warning-color);
}

.retry-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.connection-help {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  animation: slideDown var(--transition-normal);
}

.help-content h4 {
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--text-primary);
  font-size: 14px;
}

.help-content ul {
  margin: 0 0 var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.5;
}

.help-content li {
  margin-bottom: var(--spacing-xs);
}

.close-help-button {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 12px;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.close-help-button:hover {
  background: var(--primary-dark);
}

/* Connection Settings */
.connection-settings {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.setting-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  user-select: none;
}

.setting-checkbox {
  width: 16px;
  height: 16px;
  accent-color: var(--primary-color);
  cursor: pointer;
}

.setting-label {
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
}

/* Advanced Settings */
.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-light);
}

.settings-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.settings-toggle {
  padding: var(--spacing-xs);
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.settings-toggle:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.advanced-settings {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-light);
  animation: slideDown var(--transition-normal);
}

.setting-group {
  margin-bottom: var(--spacing-md);
}

.setting-label-block {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.setting-input {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 12px;
  transition: all var(--transition-fast);
}

.setting-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.1);
}

.setting-input:invalid {
  border-color: var(--error-color);
}

.setting-actions {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-light);
}

.reset-button {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--warning-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.reset-button:hover {
  background: #d69e2e;
}