:root {
  --bg: #f7f7f5; --panel: #ffffff; --text: #1d1d1f; --muted: #6b6b70; --line: #e3e3e0;
  --accent: #2b5fd9; --mark: #fff1a8;
  --s-hi: #1f8a4c; --s-ok: #5fa34a; --s-mid: #c98a1a; --s-lo: #c8443a; --s-na: #999;
  --star: #e0a100;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151518; --panel: #1e1e22; --text: #e8e8ea; --muted: #9a9aa2; --line: #2e2e34;
    --accent: #7ea2ff; --mark: #5a4a00;
    --s-hi: #3fbf73; --s-ok: #7fbf5f; --s-mid: #d9a441; --s-lo: #e0665c;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
mark { background: var(--mark); color: inherit; padding: 0 1px; border-radius: 2px; }
code { font-size: 12px; background: var(--bg); padding: 0 3px; border-radius: 3px; }
.muted { color: var(--muted); }

.top { display: flex; align-items: center; gap: 14px; padding: 10px 20px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.top h1 { font-size: 17px; margin: 0; white-space: nowrap; }
.top h1 a { color: var(--text); }
.top #q { flex: 1; max-width: 640px; min-width: 0; padding: 8px 11px; font-size: 16px; border: 1px solid var(--line); border-radius: 7px; background: var(--bg); color: var(--text); }
.top .stats { margin-left: auto; white-space: nowrap; font-size: 14px; }
.mobile-only { display: none; }
.detail .top { justify-content: space-between; }
.layout { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 20px; padding: 16px 20px; align-items: start; }
.side { position: sticky; top: 72px; max-height: calc(100vh - 88px); overflow: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.side section + section { border-top: 1px solid var(--line); margin-top: 12px; padding-top: 10px; }
.side h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin: 0 0 8px; display: flex; justify-content: space-between; }
.side h2 .mode { text-transform: none; letter-spacing: 0; font-weight: normal; }
.hint { font-size: 12px; color: var(--muted); margin: 6px 0 0; }
.hint.warn { color: var(--s-mid); }
.row { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin: 4px 0; font-size: 14px; }
.row input { width: 70px; }
input, select, button, textarea { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 5px; padding: 3px 6px; }
button { cursor: pointer; }
.check { display: flex; align-items: center; gap: 6px; font-size: 14px; margin: 3px 0; cursor: pointer; }
details summary { cursor: pointer; font-weight: 600; margin: 6px 0 4px; }
.cat { font-size: 13px; }
.cat span:first-of-type { flex: 1; }
.cat .count { color: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.cat.zero { opacity: .45; }

.toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; font-size: 14px; }
.btn-link { font-size: 14px; }

.results { list-style: none; padding: 0; margin: 0; counter-reset: none; }
.paper { display: flex; gap: 14px; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; margin-bottom: 10px; }
.paper.star { border-color: var(--star); box-shadow: inset 3px 0 0 var(--star); }
.results .paper.hidden { opacity: .5; }
.scorebox { flex: 0 0 110px; text-align: center; }
.scorebox .big { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; }
.scorebox .small { font-size: 11px; color: var(--muted); }
.chips { margin-top: 4px; display: flex; flex-wrap: wrap; gap: 3px; justify-content: center; }
.chip { display: inline-block; min-width: 26px; padding: 1px 5px; border-radius: 4px; color: #fff; font-weight: 600; font-size: 13px; text-align: center; font-variant-numeric: tabular-nums; }
.chip sub { font-weight: 400; font-size: 9px; opacity: .85; margin-left: 1px; }
.big.s-hi { color: var(--s-hi); } .big.s-ok { color: var(--s-ok); } .big.s-mid { color: var(--s-mid); } .big.s-lo { color: var(--s-lo); }
.chip.s-hi { background: var(--s-hi); } .chip.s-ok { background: var(--s-ok); } .chip.s-mid { background: var(--s-mid); } .chip.s-lo { background: var(--s-lo); } .chip.s-na { background: var(--s-na); }
.body { flex: 1; min-width: 0; }
.title-row { display: flex; justify-content: space-between; gap: 10px; align-items: flex-start; }
.title { font-weight: 600; font-size: 16px; color: var(--text); }
.actions { white-space: nowrap; }
.mk { border: 1px solid var(--line); background: transparent; color: var(--muted); width: 28px; height: 26px; padding: 0; font-size: 14px; }
.paper.star .mk.star { color: var(--star); border-color: var(--star); }
.paper.hidden .mk.hide { color: var(--s-lo); border-color: var(--s-lo); }
.authors { font-size: 13px; color: var(--muted); margin: 2px 0 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.results .abstract { font-size: 14px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; cursor: pointer; }
.results .abstract.open, body.expanded .results .abstract { -webkit-line-clamp: unset; display: block; }
.meta { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.tag { font-size: 11px; padding: 1px 7px; border-radius: 10px; border: 1px solid var(--line); color: var(--muted); }
.tag.on { border-color: var(--accent); color: var(--accent); }
.links { margin-left: auto; font-size: 13px; display: flex; gap: 10px; }
.note-view { margin-top: 6px; font-size: 13px; background: var(--bg); padding: 4px 8px; border-radius: 5px; }
.empty { padding: 40px; text-align: center; color: var(--muted); }
.pager { display: flex; gap: 10px; align-items: center; justify-content: center; padding: 10px; }

/* detail page */
.detail article { max-width: 960px; margin: 20px auto; display: block; }
.detail h2 { margin: 0 0 4px; font-size: 22px; }
.detail .authors { white-space: normal; }
.summary { display: flex; gap: 20px; align-items: flex-start; margin: 12px 0; }
.summary dl { display: grid; grid-template-columns: 140px 1fr; gap: 4px 12px; margin: 0; font-size: 14px; }
.summary dt { color: var(--muted); }
.summary dd { margin: 0; }
.detail section { margin-top: 18px; }
.detail h3 { font-size: 16px; border-bottom: 1px solid var(--line); padding-bottom: 4px; }
.abstract.full p { margin: 0 0 8px; }
.review { border: 1px solid var(--line); border-radius: 6px; padding: 6px 12px; margin-bottom: 8px; background: var(--bg); }
.review summary { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-weight: 600; }
.review summary .muted { font-weight: 400; font-size: 13px; }
.pill { font-size: 12px; font-weight: 500; border: 1px solid var(--line); border-radius: 10px; padding: 0 8px; }
.qa { margin: 8px 0; }
.qa .q { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .02em; }
.qa .a p, .review > .a p { margin: 2px 0 6px; font-size: 14px; }
.notebox { display: flex; flex-direction: column; gap: 4px; }
.notebox label { font-size: 13px; font-weight: 600; }
.notebox textarea { width: 100%; resize: vertical; }

@media (max-width: 800px) {
  body { font-size: 15px; }
  .top { padding: 8px 12px; gap: 8px; flex-wrap: wrap; }
  .top h1 { font-size: 15px; }
  .top .wide { display: none; }
  .top #q { order: 5; flex-basis: 100%; max-width: none; }
  .top .stats { font-size: 13px; }
  .mobile-only { display: inline-block; }
  #filters-btn { padding: 5px 10px; }
  .layout { grid-template-columns: 1fr; padding: 10px 12px; gap: 0; }
  /* filters become a full-screen drawer */
  .side { position: fixed; inset: 0; z-index: 20; max-height: none; border-radius: 0; border: 0; padding: 0 16px 24px;
          transform: translateX(-100%); transition: transform .2s ease; overscroll-behavior: contain; }
  body.filters-open .side { transform: none; }
  body.filters-open { overflow: hidden; }
  .side-head { display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; background: var(--panel);
               padding: 12px 0; border-bottom: 1px solid var(--line); margin-bottom: 8px; z-index: 1; }
  .side-head button { background: var(--accent); color: #fff; border: 0; padding: 7px 12px; border-radius: 6px; }
  .check, .row { min-height: 34px; }          /* bigger touch targets */
  .check input { width: 18px; height: 18px; }
  .row input, .row select { font-size: 16px; }  /* prevents iOS zoom on focus */
  .toolbar { gap: 6px 10px; font-size: 13px; }
  .toolbar .lbl { display: none; }
  .toolbar label:first-child { flex: 1; min-width: 0; }
  .toolbar #sort { width: 100%; }
  .toolbar select { font-size: 14px; }
  .top .stats { order: 3; }
  .paper { flex-direction: column; gap: 6px; padding: 10px 12px; }
  .scorebox { flex: none; display: flex; gap: 10px; align-items: center; text-align: left; }
  .scorebox .big { font-size: 22px; }
  .chips { justify-content: flex-start; margin: 0; }
  .mk { width: 36px; height: 32px; }
  .authors { white-space: normal; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; }
  .links { margin-left: 0; width: 100%; gap: 16px; padding-top: 4px; }
  .detail article { margin: 12px; }
  .detail h2 { font-size: 19px; }
  .detail .title-row { flex-direction: column; gap: 8px; }
  .summary { flex-direction: column; }
  .summary dl { grid-template-columns: 1fr; }
  .summary dt { margin-top: 6px; }
}

/* profiles & shared notes */
.nstars { font-size: 12px; color: var(--star); margin-right: 4px; font-weight: 600; cursor: default; }
.note-view.mine { border-left: 3px solid var(--accent); }
.note-view + .note-view { margin-top: 4px; }
.notebox h3 { margin-bottom: 6px; }
.small { font-size: 12px; }
.top .me { font-weight: 600; }
.warn { color: var(--s-lo); }
.who-box { max-width: 560px; margin: 32px auto; padding: 0 16px; }
.who-box h2 { font-size: 24px; margin-bottom: 4px; }
.who-box h3 { font-size: 15px; margin: 24px 0 8px; }
.user-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 8px; }
.user { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 14px 8px; background: var(--panel);
        border: 1px solid var(--line); border-radius: 10px; font-size: 15px; cursor: pointer; }
.user:hover, .user:focus { border-color: var(--accent); }
.user.me { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.user[hidden] { display: none; }
.avatar { width: 38px; height: 38px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 17px; }
.uname { font-weight: 600; text-align: center; word-break: break-word; }
#filter { width: 100%; padding: 8px 10px; margin-bottom: 8px; font-size: 16px; }
.new-user { display: flex; gap: 8px; }
.new-user input { flex: 1; padding: 9px 11px; font-size: 16px; }
.new-user button { padding: 9px 16px; background: var(--accent); color: #fff; border: 0; border-radius: 6px; }

main { min-width: 0; }
#busy.err { color: var(--s-lo); font-weight: 600; flex-basis: 100%; }

/* star / hide buttons */
.ico { width: 15px; height: 15px; vertical-align: -2px; }
.mk .ico { width: 16px; height: 16px; }
.mk.labelled { width: auto; padding: 0 10px; height: 30px; display: inline-flex; align-items: center; gap: 5px; font-size: 14px; }
.mk.labelled .on, .paper.star .mk.star.labelled .off, .paper.hidden .mk.hide.labelled .off { display: none; }
.paper.star .mk.star.labelled .on, .paper.hidden .mk.hide.labelled .on { display: inline; }
.detail .actions { display: flex; gap: 6px; flex-shrink: 0; }