:root {
  --text: #111;
  --muted: #666;
  --border: #e6e6e6;
  --bg-soft: #f7f7f7;
  --primary: #0b57d0;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  margin: 0;
  color: var(--text);
  background: #fff;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100vh;
  overflow: hidden;
}

header {
  padding: 16px 20px;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 10;
}

header h1 { margin: 0 0 6px; font-size: 22px; }
header p { margin: 0; color: var(--muted); }

main {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 0;
}

aside {
  border-right: 1px solid #eee;
  padding: 16px;
  min-height: 0;
  overflow-y: auto;
}

aside h2 { margin: 0 0 10px; font-size: 16px; }

#list { list-style: none; padding: 0; margin: 0; }
#list li { margin: 0 0 8px; }

#list button {
  width: 100%;
  text-align: left;
  border: 1px solid #e5e5e5;
  background: #fff;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  min-height: 54px;
}

#list button.active {
  border-color: #333;
  background: #f9f9f9;
}

section {
  padding: 20px;
  min-height: 0;
  overflow-y: auto;
}

.meta { color: var(--muted); margin-bottom: 12px; }

#content {
  max-width: 900px;
  line-height: 1.65;
  word-break: break-word;
}

#content h1,
#content h2,
#content h3 { line-height: 1.3; }

#content pre {
  background: #f6f6f6;
  border: 1px solid var(--border);
  padding: 10px;
  border-radius: 6px;
  overflow: auto;
}

#content code {
  background: #f2f2f2;
  padding: 2px 4px;
  border-radius: 4px;
}

#content table {
  border-collapse: collapse;
  width: 100%;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  white-space: nowrap;
}

#content th,
#content td {
  border: 1px solid #ddd;
  padding: 6px 8px;
}

#content th { background: #f5f5f5; }

#pdfLink a { color: var(--primary); }

@media (max-width: 900px) {
  header {
    padding: 12px 14px;
  }

  header h1 { font-size: 18px; }
  header p { font-size: 13px; }

  main {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  body {
    display: block;
    height: auto;
    overflow: visible;
  }

  aside {
    border-right: none;
    border-bottom: 1px solid #eee;
    padding: 10px 12px;
  }

  aside h2 {
    margin-bottom: 8px;
    font-size: 14px;
  }

  /* 日期列表改为横向卡片，减少纵向占用 */
  #list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
  }

  #list li {
    margin: 0;
    flex: 0 0 auto;
  }

  #list button {
    width: auto;
    min-width: 120px;
    min-height: 46px;
    padding: 8px 10px;
    font-size: 13px;
    border-radius: 10px;
  }

  section {
    padding: 14px 12px 20px;
  }

  .meta {
    font-size: 13px;
    margin-bottom: 10px;
  }

  #content {
    font-size: 15px;
    line-height: 1.75;
  }

  #content h1 { font-size: 24px; }
  #content h2 { font-size: 20px; }
  #content h3 { font-size: 17px; }

  #content pre {
    font-size: 12px;
    padding: 8px;
  }
}