:root {
  color-scheme: light;
  --page: #f8f8f6;
  --surface: #fff;
  --soft: #f0f0eb;
  --ink: #24251f;
  --muted: #5d6056;
  --line: #dcddd4;
  --strong-line: #c5c7ba;
  --accent: #254d9a;
  --accent-soft: #edf3ff;
  --sans: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  --radius: 12px;
  --category-ink: #52574a;
  --category-fill: #eff0ea;
  --category-border: #aeb3a3;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 1rem; }
body {
  margin: 0;
  background: repeating-linear-gradient(135deg, var(--page) 0 5px, #f0f0ed 5px 6px);
  color: var(--ink);
  font: 15px/1.65 var(--sans);
}
h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; opacity: 0.55; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.shell { width: min(68rem, calc(100% - 3rem)); margin-inline: auto; }
.skip, .skip-link { position: absolute; left: 1rem; top: 0.5rem; z-index: 5; }
.skip:not(:focus), .skip-link:not(:focus), .sr-only, .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.skip:focus, .skip-link:focus { padding: 0.35rem 0.75rem; background: var(--surface); }

.topbar { background: var(--surface); border-bottom: 1px solid var(--line); }
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
  padding-block: 0.65rem;
}
.brand { display: inline-flex; align-items: center; flex-wrap: wrap; gap: 0.2rem 0.7rem; line-height: 1.25; }
.brand strong { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.045em; }
.brand small { color: var(--muted); font-size: 0.75rem; }
.brand:hover strong { color: var(--accent); }
.topbar-actions, .month-nav, .form-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.button, .month-nav button, .dialog-top button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 2.4rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--strong-line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
}
.button:hover, .month-nav button:hover, .dialog-top button:hover { border-color: var(--muted); background: var(--soft); }
.button.primary { border-color: var(--ink); background: var(--ink); color: #fff; }
.button.primary:hover { border-color: #0d0e0b; background: #0d0e0b; }
.button.secondary { background: var(--surface); }
.button.secondary:hover { background: var(--soft); }

.layout {
  display: grid;
  grid-template-columns: minmax(10rem, 14.5rem) minmax(0, 1fr);
  gap: clamp(0.9rem, 2.4vw, 1.65rem);
  padding-inline: clamp(0.75rem, 2vw, 1.5rem);
  border-inline: 1px solid var(--line);
  background: var(--surface);
}
.sidebar { padding-block: 1.8rem; padding-inline-end: 0.75rem; border-inline-end: 1px solid var(--line); min-width: 0; }
.side-group { display: grid; gap: 0.2rem; }
.side-group + .side-group { margin-top: 1.15rem; padding-top: 1.15rem; border-top: 1px dashed var(--strong-line); }
.side-heading { padding: 0 0.55rem 0.3rem; color: var(--muted); font-size: 0.78rem; font-weight: 750; }
.side-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.2rem;
  width: 100%;
  padding: 0.35rem 0.55rem;
  border: 1px solid transparent;
  border-radius: 5px;
  color: var(--ink);
  background: transparent;
  text-align: left;
  font-size: 0.85rem;
  font-weight: 650;
}
.side-link:hover { background: var(--soft); }
.side-link:is([aria-pressed="true"], [aria-current="true"], [aria-current="page"], .active) {
  border-color: var(--line);
  background: var(--soft);
  color: var(--accent);
}

[data-category="research"] { --category-ink: #514081; --category-fill: #eeeaf7; --category-border: #a18dbd; }
[data-category="education"] { --category-ink: #275744; --category-fill: #e8f2ec; --category-border: #76a38c; }
[data-category="build"] { --category-ink: #784221; --category-fill: #f7eee2; --category-border: #bd9165; }
.dot { display: inline-block; width: 0.55rem; height: 0.55rem; flex: 0 0 0.55rem; border-radius: 50%; background: var(--category-ink); }

.main { min-width: 0; padding-block: 1.65rem 3rem; }
.intro { max-width: 44rem; margin-bottom: 1.25rem; }
.intro .eyebrow, .detail .eyebrow { color: var(--accent); margin-bottom: 0.2rem; font-size: 0.78rem; font-weight: 750; }
.intro h1, .detail h1 { font-size: clamp(1.9rem, 4vw, 3.2rem); line-height: 1.2; letter-spacing: -0.045em; text-wrap: balance; }
.intro > p:not(.eyebrow) { color: var(--muted); margin-top: 0.5rem; }

.toolbar { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.9rem; }
.searchbox { min-width: 0; flex: 1 1 auto; }
.searchbox input, .field :is(input, select, textarea) {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--strong-line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
}
.searchbox input { min-height: 2.5rem; padding: 0.4rem 0.7rem; }
:is(.searchbox, .field) :is(input, textarea)::placeholder { color: var(--muted); opacity: 0.8; }

.calendar-panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.calendar-head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.7rem 1rem; padding: 0.85rem 1rem; }
.calendar-head h2 { font-size: clamp(1.05rem, 2.6vw, 1.45rem); line-height: 1.3; font-weight: 800; white-space: nowrap; }
.month-nav :is(button, .button) { min-width: 2.3rem; }
.legend { display: flex; align-items: center; flex-wrap: wrap; gap: 0.35rem 0.8rem; color: var(--muted); font-size: 0.78rem; }
.legend > * { display: inline-flex; align-items: center; gap: 0.3rem; white-space: nowrap; }

.weekdays, .calendar-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); }
.weekdays { background: var(--soft); border-top: 1px solid var(--line); color: var(--muted); font-size: 0.78rem; font-weight: 750; }
.weekdays > * { padding: 0.35rem 0.55rem; text-align: center; }
.calendar-day {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
  min-height: clamp(5.8rem, 8vw, 7.4rem);
  padding: 0.35rem;
  border-top: 1px solid var(--line);
  border-inline-end: 1px solid var(--line);
}
.calendar-day:nth-child(7n) { border-inline-end: 0; }
.calendar-day.outside { background: #f6f6f3; }
.calendar-day.today { background: var(--accent-soft); }
.calendar-day:nth-last-child(7) { border-end-start-radius: var(--radius); }
.calendar-day:last-child { border-end-end-radius: var(--radius); }
.day-label {
  align-self: flex-start;
  display: inline-grid;
  place-items: center;
  min-width: 1.5rem;
  min-height: 1.5rem;
  padding-inline: 0.2rem;
  color: var(--ink);
  font: 700 0.78rem/1 var(--mono);
  font-variant-numeric: tabular-nums;
}
.outside .day-label { color: var(--muted); }
.today .day-label { border-radius: 50%; background: var(--accent); color: #fff; }
.empty-day { padding-inline: 0.2rem; color: var(--muted); font-size: 0.72rem; }
a.empty-day:hover { color: var(--accent); text-decoration: underline; }
.case-chip {
  display: block;
  width: 100%;
  min-width: 0;
  min-height: 1.75rem;
  padding: 0.22rem 0.35rem;
  border: 1px solid transparent;
  border-inline-start: 2px solid var(--category-border);
  border-radius: 4px;
  background: var(--category-fill);
  color: var(--category-ink);
  font-size: 0.77rem;
  font-weight: 700;
  line-height: 1.35;
  text-align: left;
  overflow-wrap: anywhere;
}
.case-chip:hover { border-color: var(--category-border); }
.case-chip:focus-visible { outline-offset: 1px; }

.case-list { margin-top: 1.45rem; }
.list-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.25rem 0.65rem; margin-bottom: 0.65rem; }
.list-head h2 { font-size: 1.2rem; line-height: 1.4; }
.list-head p, .list-head small, .list-head > span { color: var(--muted); font-size: 0.84rem; }
.empty-state { padding: 0.85rem; border: 1px dashed var(--strong-line); border-radius: var(--radius); color: var(--muted); font-size: 0.86rem; }
.cards, .related .cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 0.75rem; }
.case-card { display: flex; flex-direction: column; align-items: flex-start; gap: 0.45rem; min-width: 0; padding: 0.85rem; border: 1px solid var(--line); border-radius: var(--radius); background: #fafaf8; }
.case-card:hover { border-color: var(--strong-line); }
.badge { display: inline-flex; align-items: center; gap: 0.3rem; padding: 0.15rem 0.4rem; border-radius: 4px; color: var(--category-ink); background: var(--category-fill); font-size: 0.73rem; font-weight: 750; line-height: 1.45; }
.case-title { color: var(--ink); font-size: 1rem; font-weight: 800; line-height: 1.35; overflow-wrap: anywhere; }
button.case-title { padding: 0; border: 0; background: transparent; text-align: left; }
.case-title:is(a, button):hover, .case-title a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 0.15em; }
.case-summary { color: var(--muted); font-size: 0.86rem; overflow-wrap: anywhere; }
.card-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 0.25rem 0.6rem; width: 100%; color: var(--muted); font-size: 0.75rem; }
.case-card > .card-meta:last-child { margin-top: auto; padding-top: 0.25rem; }
.card-meta time { font-family: var(--mono); }
.card-meta a, .source-line a, .related a:not(.button), .footer a, .dialog-body a:not(.button) { color: var(--accent); text-underline-offset: 0.18em; }
.card-meta a:hover, .source-line a, .related a:not(.button):hover, .footer a:hover, .dialog-body a:not(.button):hover { text-decoration: underline; }

.footer { padding-block: 1rem 1.45rem; border-top: 1px solid var(--line); background: var(--surface); color: var(--muted); font-size: 0.8rem; }
.footer .shell { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.4rem 1.1rem; }

.dialog {
  width: min(37rem, calc(100vw - 2rem));
  max-width: none;
  max-height: calc(100dvh - 2rem);
  padding: 0;
  border: 1px solid var(--strong-line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 1rem 4rem #23251b2e;
}
.dialog[open] { display: flex; flex-direction: column; }
.dialog::backdrop { background: #25241f65; }
.dialog:is(.drawer, #case-dialog) {
  inset: 0 0 0 auto;
  width: min(35rem, 100vw);
  height: 100dvh;
  max-height: none;
  margin: 0;
  border-block: 0;
  border-inline-end: 0;
  border-radius: 0;
}
.dialog-top { display: flex; align-items: center; justify-content: space-between; gap: 0.65rem; padding: 0.8rem 1rem; border-bottom: 1px solid var(--line); }
.dialog-top h2 { font-size: 1.1rem; line-height: 1.35; }
.dialog-top button { flex: 0 0 auto; }
.dialog-body { min-height: 0; overflow: auto; padding: 1rem; }
.dialog-body > * + *, .detail-body > * + * { margin-top: 0.8rem; }
.dialog-body h3, .detail-body h2 { line-height: 1.35; overflow-wrap: anywhere; }
.dialog-body p:not(.status), .detail-body p { overflow-wrap: anywhere; }
.dialog-body .detail { padding-block: 0; }
.dialog-body .detail h1 { font-size: clamp(1.55rem, 4vw, 2.1rem); }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.8rem; }
.field { display: grid; align-content: start; gap: 0.28rem; min-width: 0; }
.field:is(.full, .field-full, :has(textarea)), .form-grid > .form-actions, .form-grid > .status { grid-column: 1 / -1; }
.field label, label.field { color: var(--ink); font-size: 0.85rem; font-weight: 700; }
.field :is(input, select, textarea) { min-height: 2.55rem; padding: 0.38rem 0.55rem; font-size: 0.93rem; font-weight: 400; }
.field textarea { min-height: 6.5rem; resize: vertical; }
.form-actions { margin-top: 0.85rem; }
.admin-language, .editorial-panel { grid-column: 1 / -1; min-width: 0; border: 1px solid var(--line); border-radius: 6px; padding: 0.75rem; }
.admin-language { display: grid; gap: 0.65rem; }
.admin-language legend { padding-inline: 0.3rem; font-weight: 750; }
.editorial-panel .form-actions { align-items: end; margin-bottom: 0.4rem; }
.status { color: var(--muted); font-size: 0.84rem; min-height: 1.3em; }
.status:empty { margin: 0; min-height: 0; }
.status:is(.error, [data-state="error"]) { color: #943323; }
.draft-box, .answer { background: var(--soft); border: 1px solid var(--line); border-radius: 6px; padding: 0.7rem; }
.draft-box:is(pre, textarea), .draft-box pre, pre.answer { width: 100%; white-space: pre-wrap; overflow-wrap: anywhere; font: 0.85rem/1.6 var(--sans); }
.draft-box textarea { min-height: 7rem; max-width: 100%; }

.detail { max-width: 52rem; margin-inline: auto; padding-block: clamp(1.3rem, 4vw, 3rem); }
.detail h1 { margin-block: 0.4rem 0.6rem; }
.detail-body { margin-block: 1.1rem; padding: clamp(0.85rem, 3vw, 1.45rem); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.source-line, .muted { color: var(--muted); font-size: 0.84rem; overflow-wrap: anywhere; }
.related { margin-top: 1.4rem; }
.related h2 { font-size: 1.18rem; margin-bottom: 0.55rem; }

.admin-page .admin-start {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid var(--strong-line);
  border-radius: var(--radius);
  background: var(--accent-soft);
}
.admin-page .admin-start h2 { font-size: 1.3rem; line-height: 1.35; }
.admin-page .admin-start-label { margin-bottom: 0.25rem; color: var(--accent); font-size: 0.8rem; font-weight: 750; }
.admin-page #review-start-detail { margin-top: 0.3rem; color: var(--muted); }
.admin-page .admin-queue-views { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 0.75rem; }
.admin-page .admin-queue-views .button[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.admin-page .admin-queue-views [data-queue-count] { padding-inline: 0.4em; border-radius: 0.65em; background: var(--soft); font-variant-numeric: tabular-nums; }
.admin-page #queue-status:not(:empty) { margin-bottom: 0.75rem; }
.admin-page #queue-cards > .case-card > .button { margin-top: auto; }
.admin-page .review-case-note { color: var(--ink); font-size: 0.87rem; overflow-wrap: anywhere; }
.admin-page .admin-disclosure { border: 1px solid var(--line); border-radius: 6px; background: var(--surface); }
.admin-page .admin-disclosure > summary { padding: 0.65rem 0.85rem; cursor: pointer; font-size: 0.88rem; font-weight: 750; }
.admin-page .admin-tools { margin-top: 0.75rem; }
.admin-page .admin-tool-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
  gap: 0.85rem;
  padding: 0.15rem 0.85rem 0.85rem;
}
.admin-page .admin-tool-list p { margin-top: 0.3rem; }
.admin-page .admin-metrics { padding: 0.85rem; border-top: 1px solid var(--line); }
.admin-page .admin-metrics h2 { font-size: 1rem; }
.admin-page .admin-metrics :is(th, td) { padding-inline-end: 0.85rem; text-align: start; }
.admin-page :is(.admin-editor-guide, .admin-editor-tools, .admin-editor-drafts-heading, .admin-editor-finish) { grid-column: 1 / -1; min-width: 0; }
.admin-page .admin-editor-guide { padding: 0.8rem; border-radius: 6px; background: var(--accent-soft); }
.admin-page .admin-editor-guide > * + *, .admin-page .admin-editor-finish > .status:not(:empty) { margin-top: 0.45rem; }
.admin-page .admin-editor-tools > :not(summary) { margin-inline: 0.85rem; }
.admin-page .admin-editor-tools > :last-child:not(.status:empty), .admin-page #editorial-hint { margin-bottom: 0.85rem; }
.admin-page #editorial-tools .form-actions { align-items: end; margin-block: 0 0.45rem; }
.admin-page .admin-editor-finish { border-top: 1px solid var(--line); padding-block: 0.8rem; }
.admin-page .admin-reject { min-height: 2.4rem; padding: 0.35rem 0.7rem; border: 0; border-radius: 6px; background: transparent; color: var(--muted); font-size: 0.84rem; }
.admin-page .admin-reject:hover { color: var(--ink); text-decoration: underline; }

@media (max-width: 57rem) {
  .shell { width: calc(100% - 2rem); }
  body { background: var(--surface); }
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding-inline: 0; border-inline: 0; }
  .sidebar { display: flex; flex-wrap: wrap; gap: 0.55rem 0.9rem; padding-block: 0.65rem; padding-inline-end: 0; border-inline-end: 0; border-bottom: 1px solid var(--line); }
  .side-group { display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem; }
  .side-group + .side-group { margin: 0; padding: 0; border: 0; }
  .side-heading { padding: 0 0.25rem 0 0; }
  .side-link { width: auto; min-height: 2rem; padding-inline: 0.4rem; font-size: 0.8rem; }
  .main { padding-top: 1.05rem; }
}

@media (max-width: 41rem) {
  .shell { width: calc(100% - 1.35rem); }
  .topbar-inner { flex-wrap: wrap; gap: 0.45rem 0.65rem; }
  .brand { align-items: baseline; }
  .brand strong { font-size: 1.06rem; }
  .brand small { font-size: 0.7rem; }
  .topbar-actions .button { min-height: 2.15rem; padding-inline: 0.47rem; font-size: 0.78rem; }
  .intro { margin-bottom: 0.85rem; }
  .calendar-head { padding: 0.55rem; gap: 0.4rem; }
  .month-nav { gap: 0.25rem; }
  .month-nav :is(button, .button) { min-width: 1.8rem; min-height: 2.05rem; padding-inline: 0.35rem; }
  .legend { gap: 0.25rem 0.55rem; }
  .weekdays > * { padding-inline: 0; }
  .calendar-day { min-height: 4.2rem; padding: 0.17rem; gap: 0.18rem; }
  .day-label { min-width: 1.25rem; min-height: 1.25rem; font-size: 0.72rem; }
  .case-chip {
    display: -webkit-box;
    min-height: 1.45rem;
    padding: 0.12rem;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    font-size: 0.7rem;
    line-height: 1.22;
  }
  .empty-day { font-size: 0.68rem; }
  .form-grid { grid-template-columns: minmax(0, 1fr); }
  .field :is(input, select, textarea), .searchbox input { font-size: 1rem; }
  .dialog-top, .dialog-body { padding-inline: 0.75rem; }
}