:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --surface: #fff;
  --text: #20252e;
  --muted: #566174;
  --line: #d7dce4;
  --primary: #315dcc;
  --on-primary: #fff;
  --error: #ad2737;
  --soft: #eef2fb;
  --radius: 12px;
  font:
    16px/1.6 system-ui,
    -apple-system,
    "Segoe UI",
    "Microsoft YaHei",
    sans-serif;
  background: var(--bg);
  color: var(--text);
}
:root[data-mode="dark"] {
  color-scheme: dark;
  --bg: #171b23;
  --surface: #222834;
  --text: #f1f3f8;
  --muted: #b3bfd3;
  --line: #485164;
  --primary: #9fb8ff;
  --on-primary: #172542;
  --error: #ffadb7;
  --soft: #303c54;
}
* {
  box-sizing: border-box;
}
[hidden] {
  display: none !important;
}
body {
  margin: 0;
}
main {
  max-width: 1180px;
  margin: auto;
  padding: 20px max(16px, env(safe-area-inset-right))
    max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}
header,
.toolbar,
.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}
h1 {
  font-size: 1.6rem;
  margin: 0;
}
h2 {
  font-size: 1.25rem;
}
h3 {
  font-size: 1.05rem;
}
.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}
.muted {
  color: var(--muted);
}
button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}
button,
input,
select {
  min-height: 44px;
}
button {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  overflow-wrap: anywhere;
  max-width: 100%;
}
button:hover {
  background: var(--soft);
}
button:disabled {
  opacity: 0.6;
  cursor: wait;
}
button.primary {
  background: var(--primary);
  color: var(--on-primary);
  border-color: transparent;
}
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
}
input:not([type="checkbox"]):not([type="radio"]),
textarea,
select {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 10px;
  min-width: 0;
}
textarea {
  resize: vertical;
  min-height: 88px;
}
label {
  display: block;
  margin: 12px 0;
  min-width: 0;
}
input[type="checkbox"],
input[type="radio"] {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  accent-color: var(--primary);
}
.check {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}
.filters {
  display: flex;
  align-items: end;
  gap: 12px;
  flex-wrap: wrap;
}
.filters > label {
  flex: 1 1 140px;
}
.filters button {
  margin-bottom: 12px;
}
.layout {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) minmax(0, 2fr);
  gap: 20px;
  margin-top: 12px;
}
#detail,
#editor {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 20px;
  border-radius: var(--radius);
  min-width: 0;
}
#list {
  display: grid;
  gap: 10px;
}
.item {
  display: block;
  text-align: left;
  width: 100%;
  padding: 14px;
}
.item[aria-pressed="true"] {
  border-color: var(--primary);
  background: var(--soft);
}
.item strong,
.item span {
  display: block;
}
.item span {
  font-size: 0.85rem;
  color: var(--muted);
}
#notice {
  min-height: 26px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
#notice[data-error="true"],
#confirm-error {
  color: var(--error);
}
.badge {
  display: inline-block;
  color: var(--muted);
  background: var(--soft);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.85rem;
}
.actions {
  justify-content: flex-end;
  margin-top: 16px;
}
.option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 50px;
  overflow-wrap: anywhere;
}
.result {
  margin: 12px 0;
}
.result p {
  margin: 0;
}
.bar {
  height: 8px;
  background: var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.bar span {
  display: block;
  height: 100%;
  background: var(--primary);
}
.people {
  padding: 0;
  list-style: none;
}
.people li {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  overflow-wrap: anywhere;
}
.markdown {
  overflow-wrap: anywhere;
}
.markdown pre,
.markdown table,
.markdown .katex-display {
  max-width: 100%;
  overflow: auto;
}
.markdown pre {
  padding: 12px;
  background: var(--soft);
  border-radius: 8px;
}
.markdown img,
.markdown svg {
  max-width: 100%;
  height: auto;
}
.markdown a {
  color: var(--primary);
}
.markdown blockquote {
  border-left: 3px solid var(--line);
  padding-left: 12px;
  margin-left: 0;
}
.markdown td,
.markdown th {
  border: 1px solid var(--line);
  padding: 6px;
}
.markdown table {
  display: block;
  border-collapse: collapse;
}
.modal {
  position: fixed;
  inset: 0;
  background: #0009;
  z-index: 5;
  display: grid;
  place-items: center;
  padding: 16px;
  overflow: auto;
}
.modal > section {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  width: min(100%, 460px);
  max-height: calc(var(--app-height, 100vh) - 32px);
  overflow: auto;
}
#notification {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
#editor {
  margin-top: 16px;
}
#preview-body {
  border: 1px solid var(--line);
  padding: 14px;
  border-radius: 8px;
  margin-top: 10px;
}
@media (max-width: 680px) {
  main {
    padding-top: 14px;
  }
  .layout {
    grid-template-columns: minmax(0, 1fr);
  }
  #detail,
  #editor {
    padding: 16px;
  }
  .filters {
    gap: 8px;
  }
  .filters > label {
    flex-basis: 120px;
  }
  .toolbar {
    margin-top: 10px;
  }
  .actions > button {
    flex: 1;
  }
  .modal > section {
    padding: 18px;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}