:root {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: transparent;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  min-width: 320px;
  min-height: 100vh;
  background-color: transparent;
}

/* Preview mode specific styles */
.preview-view {
  background-color: transparent !important;
  background: transparent !important;
}

/* 为预览页面专门设置透明背景 */
body.preview-mode,
html.preview-mode {
  background-color: transparent !important;
  background: transparent !important;
}

/* 确保 #app 在预览模式下也是透明的 */
body.preview-mode #app {
  background-color: transparent !important;
  background: transparent !important;
}

/* 确保滚动行为平滑 */
html {
  scroll-behavior: smooth;
}

/* 全局文本选择样式 */
::selection {
  background-color: rgba(52, 152, 219, 0.3);
  color: #2c3e50;
}

/* 按钮通用样式改进 */
button {
  transition: all 0.3s ease;
  border-radius: 8px;
  font-weight: 500;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: transparent;
  }
}

button:hover {
  border-color: #3498db;
  transform: translateY(-2px);
}

button:focus,
button:focus-visible {
  outline: 2px solid #3498db;
  outline-offset: 2px;
}

.card {
  padding: 2em;
}

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

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: transparent;
  }
  
  /* 确保预览模式下即使在浅色主题也是透明的 */
  body.preview-mode,
  html.preview-mode,
  body.preview-mode #app {
    background-color: transparent !important;
    background: transparent !important;
  }
  
  a:hover {
    color: #3498db;
  }
  button {
    background-color: #f8f9fa;
  }
}