body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #f8fafc;
}

.eyebrow {
  color: #6366f1;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  margin-bottom: 0.45rem;
}

.nav-btn.nav-active,
.nav-btn.nav-active:hover,
.nav-btn.nav-active:focus,
.nav-btn.nav-active:active {
  background-color: #4f46e5;
  color: #ffffff;
}

#drop-zone {
  box-shadow: 0 12px 30px rgba(79, 70, 229, 0.07);
}

.upload-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.upload-features span {
  background: #eef2ff;
  border-radius: 999px;
  color: #4f46e5;
  font-size: 0.75rem;
  padding: 0.35rem 0.65rem;
}

#tasks-list > div {
  border: 1px solid #e5e7eb;
  transition: box-shadow 0.2s, transform 0.2s;
}

#tasks-list > div:hover {
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.08);
  transform: translateY(-1px);
}

/* 结果预览页：整屏 flex 布局，最外层不滚动，目录与正文各自独立滚动 */
body.result-view {
  overflow: hidden;
}

body.result-view .app-shell {
  height: 100vh;
  max-width: 100rem;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.5rem;
}

body.result-view .topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex: 0 0 auto;
  margin-bottom: 1rem;
}

body.result-view header,
body.result-view nav {
  margin-bottom: 0;
}

body.result-view nav {
  flex-shrink: 0;
}

body.result-view #view-result {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

body.result-view #view-result > .flex:first-child {
  flex: 0 0 auto;
}

body.result-view .result-layout {
  display: flex;
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
  gap: 1rem;
}

body.result-view #result-toc,
body.result-view #result-content {
  border: 1px solid #e5e7eb;
  height: auto;
  max-height: none;
  position: static;
  min-height: 0;
  overflow: auto;
  flex: 1 1 0;
}

body.result-view #result-content {
  scroll-behavior: smooth;
}

body.result-view #result-toc {
  flex: 0 0 16rem;
}

body.result-view #result-content {
  flex: 1 1 auto;
  min-width: 0;
}

#result-toc a {
  display: block;
  border-left: 2px solid transparent;
  padding: 0.3rem 0.5rem;
  line-height: 1.45;
  transition: color 0.15s, background-color 0.15s, border-color 0.15s;
}

#result-toc a.active {
  background: #eef2ff;
  border-left-color: #4f46e5;
  border-radius: 0 0.25rem 0.25rem 0;
}

/* 移动端：目录通过左侧抽屉打开，正文保持整页自然滚动 */
@media (max-width: 767px) {
  body.result-view {
    overflow: auto;
  }

  body.result-view.toc-open {
    overflow: hidden;
  }

  body.result-view .app-shell {
    height: auto;
    padding-top: 1rem;
    padding-bottom: 1.5rem;
  }

  body.result-view .topbar {
    display: block;
    margin-bottom: 1rem;
  }

  body.result-view nav {
    margin-top: 1rem;
    width: 100%;
  }

  body.result-view #view-result,
  body.result-view .result-layout {
    display: flex;
    flex-direction: column;
  }

  body.result-view .result-layout {
    flex: none;
    overflow: visible;
  }

  body.result-view #result-content {
    overflow: visible;
    flex: none;
    width: 100%;
    scroll-margin-top: 1rem;
  }

  body.result-view #result-toc {
    display: block;
    position: fixed;
    z-index: 30;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(82vw, 21rem);
    max-height: none;
    overflow-y: auto;
    border: 0;
    border-radius: 0 0.75rem 0.75rem 0;
    padding: 1.25rem 1rem 2rem;
    transform: translateX(-105%);
    transition: transform 0.25s ease;
    box-shadow: 0.5rem 0 2rem rgba(15, 23, 42, 0.2);
  }

  body.result-view #result-toc.toc-open {
    transform: translateX(0);
    visibility: visible;
  }

  .toc-backdrop {
    position: fixed;
    z-index: 20;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
  }

  body.result-view.toc-open .toc-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  #btn-toc {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 40;
    display: grid;
    width: 2.75rem;
    height: 2.75rem;
    margin: 0;
    place-items: center;
    border: 1px solid #e5e7eb;
    border-radius: 999px;
    background: #ffffff;
    color: #4f46e5;
    box-shadow: 0 0.25rem 0.75rem rgba(15, 23, 42, 0.14);
  }

  #btn-toc svg {
    width: 1.45rem;
    height: 1.45rem;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.8;
  }

  #btn-toc:active {
    transform: scale(0.94);
  }

  #result-toc h3 {
    font-size: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #e5e7eb;
  }

  #result-toc a {
    padding: 0.65rem 0.75rem;
    border-left-width: 3px;
    font-size: 0.95rem;
  }

  body.result-view #result-content {
    scroll-behavior: auto;
  }
}

#drop-zone.dragover {
  background-color: #eef2ff;
  border-color: #4f46e5;
}

.prose h1, .prose h2, .prose h3, .prose h4 {
  color: #1f2937;
  margin-top: 1.5em;
  margin-bottom: 0.75em;
}

.prose p {
  margin-bottom: 1em;
  line-height: 1.8;
  text-align: justify;
}

/* 长英文串/链接在窄屏自动换行，避免被容器右边缘裁掉 */
.prose,
.prose p,
.prose li,
.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  overflow-wrap: break-word;
  word-break: break-word;
}

/* Markdown 表格样式（Tailwind preflight 会清除表格边框/内边距，需显式补回） */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 0.875rem;
  display: block;
  overflow-x: auto;
}

.prose thead {
  display: table-header-group;
}

.prose th,
.prose td {
  border: 1px solid #d1d5db;
  padding: 0.5rem 0.75rem;
  text-align: left;
  vertical-align: top;
  white-space: normal;
}

.prose th {
  background-color: #f3f4f6;
  font-weight: 600;
  color: #1f2937;
}

.prose tbody tr:nth-child(even) {
  background-color: #f9fafb;
}

.prose code {
  background-color: #f3f4f6;
  padding: 0.15rem 0.35rem;
  border-radius: 0.25rem;
  font-size: 0.875em;
}

.prose pre {
  background-color: #1f2937;
  color: #e5e7eb;
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin: 1em 0;
}

.prose pre code {
  background-color: transparent;
  padding: 0;
  color: inherit;
  font-size: 0.85rem;
  line-height: 1.6;
}

.prose ul,
.prose ol {
  margin: 0.5em 0 1em;
  padding-left: 1.5em;
}

.prose li {
  margin-bottom: 0.35em;
  line-height: 1.7;
}

#result-toc ul {
  list-style: none;
  padding-left: 0;
}

#result-toc li {
  margin-bottom: 0.5rem;
}

#result-toc a {
  color: #4b5563;
  text-decoration: none;
  font-size: 0.875rem;
}

#result-toc a:hover {
  color: #4f46e5;
}

#result-toc a.active {
  color: #4f46e5;
  font-weight: 600;
}