/* ArtSeek project page */

:root {
  --bg: #faf7f2;
  --surface: #ffffff;
  --surface-2: #f3eee6;
  --ink: #1f1b16;
  --ink-2: #5b5349;
  --line: #e4dccf;
  --accent: #b5532f;        /* terracotta */
  --accent-soft: #f6e3da;
  --gold: #b8892e;
  --good: #2e7d4f;
  --good-soft: #e2f1e7;
  --bad: #b3372f;
  --bad-soft: #f8e1df;
  --neutral: #8a8175;
  --user: #efe8dc;
  --think: #fbf5e6;
  --tool: #eef3fa;
  --tool-ink: #2c5a8f;
  --shadow: 0 1px 2px rgba(31, 27, 22, .06), 0 8px 24px rgba(31, 27, 22, .06);
  --radius: 14px;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --c-base: #9a9187;
  --c-nocls: #d9a441;
  --c-full: #b5532f;
  --c-gpt: #4f6d8f;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15130f; --surface: #1e1b16; --surface-2: #26221b; --ink: #f1ebe1; --ink-2: #b9ae9e;
    --line: #36302662; --accent: #e27a52; --accent-soft: #3a2419; --good: #5cc28a; --good-soft: #17301f;
    --bad: #ec7a70; --bad-soft: #3a1d1a; --user: #2b261e; --think: #2a2517; --tool: #1a2533; --tool-ink: #8fb6e6;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35); --c-base: #8d8479;
  }
}
:root[data-theme="dark"] {
  --bg: #15130f; --surface: #1e1b16; --surface-2: #26221b; --ink: #f1ebe1; --ink-2: #b9ae9e;
  --line: #36302662; --accent: #e27a52; --accent-soft: #3a2419; --good: #5cc28a; --good-soft: #17301f;
  --bad: #ec7a70; --bad-soft: #3a1d1a; --user: #2b261e; --think: #2a2517; --tool: #1a2533; --tool-ink: #8fb6e6;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35); --c-base: #8d8479;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 var(--sans); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: .88em; background: var(--surface-2); padding: .1em .35em; border-radius: 5px; }
h2 { font-family: var(--serif); font-weight: 650; font-size: clamp(1.7rem, 3vw, 2.3rem); margin: 0 0 .6rem; letter-spacing: -.01em; }
h4 { margin: 0 0 .5rem; font-size: 1rem; }
.muted { color: var(--ink-2); }
.small { font-size: .85rem; }
.center { text-align: center; }

/* nav */
.nav { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 1.5rem; padding: .7rem clamp(1rem, 4vw, 3rem);
  background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav-brand { font-family: var(--serif); font-weight: 650; font-size: 1.2rem; color: var(--ink); }
.nav-links { display: flex; gap: 1.2rem; flex: 1; overflow-x: auto; scrollbar-width: none; }
.nav-links a { color: var(--ink-2); font-size: .92rem; white-space: nowrap; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.theme-toggle { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; width: 34px; height: 34px; cursor: pointer; font-size: 1rem; }

/* hero */
.hero { text-align: center; padding: clamp(3rem, 7vw, 5.5rem) 1rem 2rem;
  background: radial-gradient(1200px 400px at 50% -10%, var(--accent-soft), transparent 70%); }
.status-badge { display: inline-block; font-size: .8rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: .25rem .8rem; margin-bottom: 1.2rem; }
.hero h1 { margin: 0 auto; max-width: 980px; font-family: var(--serif); font-weight: 650; line-height: 1.12; }
.hero .brand { font-size: clamp(3rem, 8vw, 5rem); letter-spacing: -.02em;
  background: linear-gradient(120deg, var(--accent), var(--gold)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .subtitle { display: inline-block; margin-top: .6rem; font-size: clamp(1.15rem, 2.4vw, 1.65rem); font-weight: 500; color: var(--ink); }
.authors { margin: 1.4rem 0 .2rem; font-size: 1.1rem; }
.authors span { margin: 0 .7rem; white-space: nowrap; display: inline-block; }
.affiliation { margin: 0; color: var(--ink-2); }
.buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: .6rem; margin: 1.6rem 0 0; }
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .55rem 1.05rem; border-radius: 999px; background: var(--ink); color: var(--bg);
  font-weight: 500; font-size: .95rem; transition: transform .15s ease, opacity .15s; }
.btn:hover { text-decoration: none; transform: translateY(-1px); opacity: .9; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }

/* pipeline teaser */
.teaser { max-width: 1150px; margin: 2.8rem auto 0; }
.pipeline { display: flex; align-items: stretch; gap: .4rem; }
.pnode { flex: 1; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem .8rem; box-shadow: var(--shadow);
  opacity: .45; transform: translateY(6px); transition: all .5s ease; display: flex; flex-direction: column; gap: .2rem; }
.pnode.on { opacity: 1; transform: none; border-color: var(--accent); }
.pnode .picon { font-size: 1.5rem; color: var(--accent); }
.pnode b { font-size: .95rem; }
.pnode small { color: var(--ink-2); font-size: .8rem; line-height: 1.35; }
.parrow { width: 26px; align-self: center; height: 2px; background: var(--line); position: relative; overflow: hidden; flex: none; }
.parrow::after { content: ""; position: absolute; inset: 0; background: var(--accent); transform: translateX(-100%); transition: transform .5s ease; }
.parrow.on::after { transform: none; }

/* sections */
main { padding-bottom: 2rem; }
.section { max-width: 1200px; margin: 0 auto; padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1rem, 4vw, 2rem) 0; }
.section.narrow { max-width: 880px; }
.lead { color: var(--ink-2); max-width: 820px; margin: 0 0 1.5rem; }
#abstract p { text-align: justify; hyphens: auto; }

.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-top: 2rem; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; box-shadow: var(--shadow); }
.stat-num { display: block; font-family: var(--serif); font-size: 2rem; font-weight: 650; color: var(--accent); }
.stat-label { color: var(--ink-2); font-size: .85rem; line-height: 1.35; display: block; }

/* demo */
.demo { display: grid; grid-template-columns: 170px minmax(0, 1fr) 290px; gap: 1rem; align-items: start; }
.gallery { display: flex; flex-direction: column; gap: .6rem; position: sticky; top: 76px; }
.thumb { position: relative; border: 2px solid transparent; border-radius: 12px; overflow: hidden; cursor: pointer; background: var(--surface);
  padding: 0; text-align: left; box-shadow: var(--shadow); transition: border-color .2s, transform .2s; color: var(--ink); }
.thumb:hover { transform: translateY(-2px); }
.thumb.active { border-color: var(--accent); }
.thumb img { width: 100%; height: 96px; object-fit: cover; }
.thumb span { display: block; font-size: .75rem; padding: .35rem .5rem .45rem; line-height: 1.25; }
.thumb .tag { position: absolute; top: 6px; left: 6px; font-size: .65rem; font-weight: 600; padding: .1rem .45rem; border-radius: 999px; }
.tag.success { background: var(--good-soft); color: var(--good); }
.tag.failure { background: var(--bad-soft); color: var(--bad); }

.chat-panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.chat-toolbar { display: flex; justify-content: space-between; align-items: center; gap: .5rem; padding: .6rem .8rem; border-bottom: 1px solid var(--line); background: var(--surface-2); flex-wrap: wrap; }
.steps { display: flex; gap: .3rem; flex-wrap: wrap; }
.steps span { font-size: .75rem; padding: .2rem .55rem; border-radius: 999px; color: var(--ink-2); border: 1px solid var(--line); transition: all .3s; }
.steps span.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.controls { display: flex; gap: .4rem; }
.chip { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: .25rem .7rem; font: 500 .8rem var(--sans); cursor: pointer; }
.chip:hover { border-color: var(--accent); }

.chat { height: 640px; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: .75rem; scroll-behavior: smooth; }
.msg { max-width: 92%; border-radius: 14px; padding: .7rem .9rem; animation: pop .35s ease; font-size: .93rem; }
@keyframes pop { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.msg.user { align-self: flex-end; background: var(--user); border-bottom-right-radius: 4px; }
.msg.user img { width: 170px; border-radius: 10px; margin-bottom: .5rem; }
.msg .who { font-size: .72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-2); margin-bottom: .25rem; }
.msg.bot { align-self: flex-start; background: var(--surface-2); border-bottom-left-radius: 4px; }
.msg.card { background: var(--surface); border: 1px solid var(--line); width: 92%; }
.card-row { display: grid; grid-template-columns: 62px 1fr; gap: .5rem; align-items: center; margin: .3rem 0; font-size: .82rem; }
.card-row .task { color: var(--ink-2); font-weight: 500; }
.bars { display: flex; flex-direction: column; gap: .2rem; }
.bar { position: relative; background: var(--surface-2); border-radius: 6px; height: 22px; overflow: hidden; }
.bar .fill { position: absolute; inset: 0 auto 0 0; width: 0; background: linear-gradient(90deg, var(--accent-soft), color-mix(in srgb, var(--accent) 45%, transparent)); transition: width 1s ease; }
.bar .lbl { position: relative; padding: 0 .5rem; line-height: 22px; display: flex; justify-content: space-between; font-size: .78rem; }
.card-note { font-size: .75rem; color: var(--ink-2); margin-top: .4rem; }

.msg.tool { background: var(--tool); color: var(--tool-ink); font-family: var(--mono); font-size: .82rem; width: 92%; }
.search-anim { display: grid; grid-template-columns: repeat(40, 1fr); gap: 3px; margin: .6rem 0 .3rem; }
.search-anim i { aspect-ratio: 1; border-radius: 2px; background: color-mix(in srgb, var(--tool-ink) 18%, transparent); }
.search-anim i.lit { background: var(--tool-ink); }
.search-anim i.hit { background: var(--accent); }
.docs { display: flex; flex-direction: column; gap: .5rem; width: 92%; }
.doc { display: grid; grid-template-columns: 30px 64px 1fr; gap: .6rem; align-items: start; background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: .55rem .7rem; animation: slide .45s ease both; font-size: .82rem; }
.doc.noimg { grid-template-columns: 30px 1fr; }
@keyframes slide { from { opacity: 0; transform: translateX(-16px); } to { opacity: 1; transform: none; } }
.doc .rank { font-family: var(--serif); font-weight: 650; color: var(--accent); font-size: 1.1rem; }
.doc img { width: 64px; height: 64px; object-fit: cover; border-radius: 8px; }
.doc .dtitle { font-weight: 600; font-size: .86rem; }
.doc .dtext { color: var(--ink-2); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.doc.relevant { border-color: var(--good); box-shadow: 0 0 0 2px var(--good-soft); }
.msg.think { background: var(--think); font-size: .86rem; color: var(--ink-2); font-style: italic; }
.msg.think summary { cursor: pointer; font-style: normal; font-weight: 600; color: var(--ink); }
.msg.answer { background: var(--surface); border: 1px solid var(--accent); }
.caret::after { content: "▍"; animation: blink 1s steps(2) infinite; color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }

.score { display: inline-flex; align-items: center; gap: .35rem; font-size: .78rem; font-weight: 600; padding: .2rem .6rem; border-radius: 999px; margin-top: .5rem; }
.score.s2 { background: var(--good-soft); color: var(--good); }
.score.s1 { background: #fbefd5; color: #9a6b12; }
.score.s0 { background: var(--bad-soft); color: var(--bad); }

.side { display: flex; flex-direction: column; gap: .8rem; position: sticky; top: 76px; }
.side-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1rem; box-shadow: var(--shadow); font-size: .88rem; }
.side-card p { margin: 0; }
.side-card.note { background: var(--accent-soft); border-color: transparent; }
.side-card.note.failure { background: var(--bad-soft); }
.clamp { max-height: 230px; overflow-y: auto; }

/* tabs */
.tabs { display: flex; gap: .4rem; flex-wrap: wrap; margin-bottom: 1.2rem; }
.tab { border: 1px solid var(--line); background: var(--surface); color: var(--ink-2); padding: .45rem .9rem; border-radius: 999px; cursor: pointer; font: 500 .9rem var(--sans); }
.tab.active { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.tab-panel { display: none; animation: pop .3s ease; }
.tab-panel.active { display: block; }
figure { margin: 0 0 1.2rem; }
figure img { margin: 0 auto; border-radius: 10px; background: #fff; }
.fig-medium { max-width: 760px; }
.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.cols p { margin: 0; font-size: .93rem; color: var(--ink-2); }
.cols b { color: var(--ink); }

.ret-anim { margin-top: 1.8rem; display: grid; grid-template-columns: 1.3fr auto 1fr auto 1.2fr; gap: 1rem; align-items: center; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem; box-shadow: var(--shadow); }
.ret-col { text-align: center; }
.ret-col small { color: var(--ink-2); font-size: .78rem; }
.ret-title { font-weight: 600; margin-bottom: .5rem; font-size: .9rem; }
.ret-arrow { text-align: center; font-size: .78rem; color: var(--ink-2); line-height: 1.3; }
.ret-arrow b { color: var(--accent); font-size: .95rem; }
.dotgrid { display: grid; grid-template-columns: repeat(30, 1fr); gap: 2px; }
.dotgrid.small { grid-template-columns: repeat(10, 1fr); gap: 3px; }
.dotgrid i { aspect-ratio: 1; border-radius: 2px; background: var(--surface-2); transition: background .3s; }
.dotgrid i.lit { background: color-mix(in srgb, var(--accent) 60%, transparent); }
.ranked { display: flex; flex-direction: column; gap: 3px; }
.ranked i { height: 12px; border-radius: 3px; background: var(--accent); transform-origin: left; transform: scaleX(0); transition: transform .4s ease; }
.ranked i.on { transform: scaleX(1); }

/* wikifragments */
.wf-grid { display: grid; grid-template-columns: 280px 1fr; gap: 1.5rem; align-items: start; }
.wf-stats { display: flex; flex-direction: column; gap: .8rem; }
.wf-stats .btn { justify-content: center; }
.frame { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: .8rem; box-shadow: var(--shadow); }
.frame figcaption { color: var(--ink-2); font-size: .85rem; margin-top: .5rem; }

/* charts */
.chart { width: 100%; }
.chart svg { width: 100%; height: auto; overflow: visible; font-family: var(--sans); }
.chart text { fill: var(--ink-2); font-size: 12px; }
.chart .axis { stroke: var(--line); }
.chart .zero { stroke: var(--ink-2); stroke-dasharray: 3 3; }
.legend { display: flex; gap: 1rem; flex-wrap: wrap; font-size: .85rem; margin-bottom: .6rem; }
.legend span::before { content: ""; display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: .35rem; vertical-align: -1px; background: var(--c); }
.tooltip { position: fixed; pointer-events: none; background: var(--ink); color: var(--bg); font-size: .8rem; padding: .35rem .55rem; border-radius: 8px; opacity: 0; transition: opacity .12s; z-index: 50; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-top: 1.5rem; }

.table-wrap { overflow-x: auto; }
.rtable { border-collapse: collapse; width: 100%; font-size: .9rem; background: var(--surface); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.rtable th, .rtable td { padding: .55rem .8rem; text-align: center; border-bottom: 1px solid var(--line); }
.rtable th { background: var(--surface-2); font-weight: 600; }
.rtable td:first-child, .rtable th:first-child { text-align: left; }
.rtable tr.hl td { background: var(--accent-soft); }

/* human study */
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; background: var(--surface); margin-bottom: 1rem; flex-wrap: wrap; }
.seg button { border: 0; background: transparent; color: var(--ink-2); padding: .3rem .8rem; border-radius: 999px; cursor: pointer; font: 500 .85rem var(--sans); }
.seg button.active { background: var(--ink); color: var(--bg); }
.seg.small button { font-size: .78rem; padding: .25rem .65rem; }
.blind { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.blind-head { display: flex; gap: .9rem; align-items: center; margin-bottom: .8rem; }
.blind-head img { width: 110px; height: 110px; object-fit: cover; border-radius: 10px; }
.blind-title { font-weight: 600; margin-bottom: .4rem; font-size: .92rem; }
.blind-options { display: flex; flex-direction: column; gap: .5rem; }
.bopt { text-align: left; border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 12px; padding: .6rem .75rem; cursor: pointer;
  font: .82rem/1.5 var(--sans); white-space: pre-line; max-height: 150px; overflow-y: auto; transition: border-color .2s; }
.bopt:hover { border-color: var(--accent); }
.bopt .blabel { font-weight: 700; color: var(--accent); margin-right: .3rem; }
.bopt.reveal { cursor: default; }
.bopt.is-artseek { border-color: var(--good); box-shadow: 0 0 0 2px var(--good-soft); }
.bopt.wrong { border-color: var(--bad); }
.bsys { display: block; font-weight: 700; margin-bottom: .3rem; font-size: .8rem; }
.bopt.is-artseek .bsys { color: var(--good); }
.bopt.wrong .bsys { color: var(--bad); }
.blind-result { margin-top: .7rem; font-size: .88rem; }

/* bibtex + footer */
.bib { position: relative; }
.bib pre { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem; overflow-x: auto; font: .85rem/1.55 var(--mono); margin: 0; }
.copy { position: absolute; top: .7rem; right: .7rem; }
.footer { max-width: 900px; margin: 4rem auto 0; padding: 2rem 1rem 3rem; border-top: 1px solid var(--line); color: var(--ink-2); font-size: .82rem; text-align: center; }

/* responsive */
@media (max-width: 1080px) {
  .demo { grid-template-columns: 1fr; }
  .gallery { position: static; flex-direction: row; overflow-x: auto; }
  .thumb { min-width: 130px; }
  .side { position: static; }
  .chat { height: 560px; }
}
@media (max-width: 860px) {
  .pipeline { flex-direction: column; }
  .parrow { width: 2px; height: 16px; align-self: center; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .cols, .two, .wf-grid { grid-template-columns: 1fr; }
  .ret-anim { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}