/* ============================================================
   Shared stylesheet — "Manuscript" editorial academic theme
   Display: Fraunces (serif) · Body: Newsreader · Mono: JetBrains Mono
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,500;0,9..144,600;0,9..144,700;1,9..144,400&family=Newsreader:ital,opsz,wght@0,6..72,300;0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --ink:        #1a1714;
  --ink-soft:   #4a4540;
  --paper:      #f4efe6;
  --paper-2:    #ebe4d6;
  --card:       #fbf8f1;
  --line:       #d8cfbe;
  --rule:       #c4b8a1;
  --accent:     #9c2f1f;   /* oxblood */
  --accent-2:   #1d4e4a;   /* deep teal */
  --gold:       #b07d2b;
  --shadow:     0 1px 2px rgba(40,30,20,.06), 0 8px 30px rgba(40,30,20,.07);
  --maxw:       1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Newsreader', Georgia, serif;
  font-size: 19px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(circle at 12% 18%, rgba(156,47,31,.035), transparent 42%),
    radial-gradient(circle at 88% 8%, rgba(29,78,74,.04), transparent 40%);
}

/* paper grain overlay */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none; z-index: 999;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--accent); color: var(--paper); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- Display typography ---------- */
h1, h2, h3, .display {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: .72rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

/* ============================================================
   Top bar
   ============================================================ */
.topbar {
  position: sticky; top: 0; z-index: 200;
  background: rgba(244,239,230,.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 62px;
}
.brand {
  font-family: 'Fraunces', serif; font-weight: 600; font-size: 1.05rem;
  color: var(--ink); letter-spacing: -.01em; display: flex; align-items: center; gap: .55rem;
}
.brand .mark {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: var(--paper);
  display: grid; place-items: center;
  font-size: .8rem; font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}
.brand:hover { text-decoration: none; }
.navlinks { display: flex; gap: 1.6rem; align-items: center; }
.navlinks a {
  font-family: 'JetBrains Mono', monospace;
  font-size: .76rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-soft); font-weight: 500;
}
.navlinks a:hover { color: var(--accent); text-decoration: none; }
@media (max-width: 640px){ .navlinks { gap: 1rem; } .navlinks a:not(.btn-mini){ display:none; } }

.btn-mini {
  border: 1px solid var(--rule); border-radius: 100px;
  padding: .42rem .95rem !important; color: var(--ink) !important;
}
.btn-mini:hover { background: var(--ink); color: var(--paper) !important; border-color: var(--ink); }

/* ============================================================
   Hero (index)
   ============================================================ */
.hero { padding: 96px 0 60px; position: relative; }
.hero .kicker { margin-bottom: 1.6rem; }
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.7rem);
  max-width: 14ch;
  margin: 0 0 1.4rem;
}
.hero h1 em { font-style: italic; color: var(--accent); }
.hero .lede {
  font-size: 1.32rem; max-width: 62ch; color: var(--ink-soft);
  font-weight: 300; line-height: 1.55;
}
.affil {
  margin-top: 2.2rem; display: flex; flex-wrap: wrap; gap: .6rem 1.8rem;
  font-family: 'JetBrains Mono', monospace; font-size: .78rem;
  color: var(--ink-soft); letter-spacing: .03em;
}
.affil span { display: inline-flex; align-items: center; gap: .5rem; }
.affil .dot { width: 6px; height: 6px; background: var(--accent-2); border-radius: 50%; }

.scroll-rule {
  height: 1px; background: var(--rule); margin: 56px 0 0;
  position: relative;
}
.scroll-rule::after {
  content: "RESEARCH"; position: absolute; right: 0; top: -.7rem;
  background: var(--paper); padding-left: 1rem;
  font-family: 'JetBrains Mono', monospace; font-size: .66rem;
  letter-spacing: .3em; color: var(--rule);
}

/* ============================================================
   Paper cards (index)
   ============================================================ */
.papers { padding: 64px 0 40px; display: grid; gap: 40px; }
.pcard {
  position: relative;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .4s cubic-bezier(.2,.8,.2,1), box-shadow .4s;
}
.pcard:hover { transform: translateY(-4px); box-shadow: 0 2px 4px rgba(40,30,20,.08), 0 22px 50px rgba(40,30,20,.13); }
.pcard.flip { grid-template-columns: 1fr 1.05fr; }
.pcard.flip .pcard-fig { order: -1; }

.pcard-body { padding: 44px 42px; display: flex; flex-direction: column; }
.pcard .tag {
  font-family: 'JetBrains Mono', monospace; font-size: .68rem;
  letter-spacing: .22em; text-transform: uppercase; font-weight: 600;
  color: var(--accent-2); margin-bottom: 1.1rem;
}
.pcard h2 { font-size: 1.95rem; margin: 0 0 1rem; line-height: 1.12; }
.pcard h2 a { color: var(--ink); }
.pcard h2 a:hover { color: var(--accent); text-decoration: none; }
.pcard p { color: var(--ink-soft); font-size: 1.04rem; margin: 0 0 1.5rem; font-weight: 300; }
.pcard .stat-row { display: flex; gap: 1.8rem; margin: auto 0 1.6rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.pcard .stat .n { font-family: 'Fraunces', serif; font-size: 1.7rem; font-weight: 600; color: var(--accent); display: block; line-height: 1; }
.pcard .stat .l { font-family: 'JetBrains Mono', monospace; font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); margin-top: .35rem; display: block; }
.pcard .links { display: flex; gap: .7rem; flex-wrap: wrap; }

.pcard-fig {
  background: var(--paper-2);
  display: grid; place-items: center; padding: 32px;
  border-left: 1px solid var(--line);
  position: relative; overflow: hidden;
}
.pcard.flip .pcard-fig { border-left: none; border-right: 1px solid var(--line); }
.pcard-fig img { max-width: 100%; max-height: 320px; object-fit: contain; mix-blend-mode: multiply; }

@media (max-width: 860px){
  .pcard, .pcard.flip { grid-template-columns: 1fr; }
  .pcard.flip .pcard-fig { order: 0; }
  .pcard-fig { border-left: none !important; border-right: none !important; border-top: 1px solid var(--line); }
  .pcard-body { padding: 34px 26px; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: 'JetBrains Mono', monospace; font-size: .74rem;
  letter-spacing: .06em; text-transform: uppercase; font-weight: 600;
  padding: .6rem 1.15rem; border-radius: 100px;
  border: 1px solid var(--rule); color: var(--ink);
  transition: all .2s;
}
.btn:hover { text-decoration: none; }
.btn.primary { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.btn.primary:hover { background: #82261a; border-color: #82261a; }
.btn.ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn svg { width: 14px; height: 14px; }

/* ============================================================
   Detail page
   ============================================================ */
.paper-hero { padding: 72px 0 40px; }
.paper-hero .venue {
  font-family: 'JetBrains Mono', monospace; font-size: .74rem;
  letter-spacing: .2em; text-transform: uppercase; color: var(--accent-2);
  font-weight: 600; margin-bottom: 1.4rem;
}
.paper-hero h1 { font-size: clamp(2.1rem, 4.5vw, 3.4rem); max-width: 20ch; margin: 0 0 1.6rem; }
.authors { font-size: 1.12rem; color: var(--ink); margin-bottom: .4rem; }
.authors b { font-weight: 600; }
.authors sup { color: var(--accent); }
.author-affil { font-size: .96rem; color: var(--ink-soft); font-style: italic; margin-bottom: 1.8rem; }
.action-row { display: flex; gap: .7rem; flex-wrap: wrap; margin-bottom: 8px; }

.section { padding: 36px 0; }
.section + .section { border-top: 1px solid var(--line); }
.section h2 {
  font-size: 1.9rem; margin: 0 0 .3rem;
  display: flex; align-items: baseline; gap: .8rem;
}
.section h2 .num {
  font-family: 'JetBrains Mono', monospace; font-size: .9rem;
  color: var(--accent); font-weight: 600;
}
.section h3 { font-size: 1.25rem; margin: 2rem 0 .6rem; color: var(--ink); }
.section p { max-width: 72ch; color: var(--ink); }
.section p.muted { color: var(--ink-soft); }

.abstract-card {
  background: var(--card); border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 5px; padding: 32px 36px; box-shadow: var(--shadow);
}
.abstract-card p { margin: 0; font-size: 1.08rem; max-width: none; }

/* figure block */
figure.fig { margin: 28px 0; background: var(--card); border: 1px solid var(--line); border-radius: 5px; padding: 24px; box-shadow: var(--shadow); }
figure.fig img { width: 100%; height: auto; display: block; border-radius: 3px; mix-blend-mode: multiply; }
figure.fig figcaption { font-size: .92rem; color: var(--ink-soft); margin-top: 1rem; font-style: italic; max-width: none; line-height: 1.5; }
figure.fig figcaption b { font-style: normal; font-family: 'JetBrains Mono', monospace; font-size: .78rem; letter-spacing: .04em; color: var(--accent); margin-right: .4rem; }

/* contribution list */
.contribs { list-style: none; padding: 0; margin: 1.4rem 0 0; display: grid; gap: 14px; }
.contribs li {
  background: var(--card); border: 1px solid var(--line); border-radius: 5px;
  padding: 20px 22px 20px 56px; position: relative; max-width: 76ch;
}
.contribs li::before {
  counter-increment: c; content: counter(c);
  position: absolute; left: 18px; top: 20px;
  font-family: 'JetBrains Mono', monospace; font-weight: 600;
  color: var(--paper); background: var(--accent);
  width: 24px; height: 24px; border-radius: 50%;
  display: grid; place-items: center; font-size: .8rem;
}
.contribs { counter-reset: c; }
.contribs li b { font-family: 'Fraunces', serif; }

/* ---------- results table ---------- */
.table-scroll { overflow-x: auto; margin: 22px 0; border: 1px solid var(--line); border-radius: 6px; box-shadow: var(--shadow); }
table.results {
  border-collapse: collapse; width: 100%; background: var(--card);
  font-size: .92rem; min-width: 640px;
}
table.results th, table.results td { padding: 10px 14px; text-align: center; }
table.results th {
  font-family: 'JetBrains Mono', monospace; font-size: .68rem;
  letter-spacing: .08em; text-transform: uppercase; font-weight: 600;
  color: var(--ink-soft); border-bottom: 2px solid var(--rule);
  background: var(--paper-2);
}
table.results td:first-child, table.results th:first-child { text-align: left; font-weight: 500; }
table.results tbody tr { border-bottom: 1px solid var(--line); }
table.results tbody tr:last-child { border-bottom: none; }
table.results td.best { color: var(--accent); font-weight: 700; }
table.results td.second { text-decoration: underline; text-underline-offset: 2px; }
table.results tr.ours { background: rgba(156,47,31,.07); }
table.results tr.ours td:first-child { font-weight: 700; color: var(--accent); }
table.results tr.ablation td { color: var(--ink-soft); font-style: italic; }
table.results .meta { font-family: 'JetBrains Mono', monospace; font-size: .62rem; color: var(--ink-soft); }

.tnote { font-size: .82rem; color: var(--ink-soft); font-style: italic; margin: -8px 0 0; }

/* highlight stat strip */
.kpi-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px,1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; margin: 24px 0; }
.kpi { background: var(--card); padding: 24px 20px; text-align: center; }
.kpi .n { font-family: 'Fraunces', serif; font-size: 2.3rem; font-weight: 600; color: var(--accent); line-height: 1; }
.kpi .n small { font-size: 1.1rem; color: var(--ink-soft); }
.kpi .l { font-family: 'JetBrains Mono', monospace; font-size: .64rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); margin-top: .6rem; }

/* method steps */
.steps { display: grid; gap: 16px; margin: 22px 0; counter-reset: s; }
.step { display: grid; grid-template-columns: auto 1fr; gap: 20px; background: var(--card); border: 1px solid var(--line); border-radius: 5px; padding: 22px 24px; }
.step .badge { counter-increment: s; font-family: 'JetBrains Mono', monospace; font-weight: 700; color: var(--accent-2); font-size: 1.5rem; }
.step .badge::before { content: "0" counter(s); }
.step h4 { font-family: 'Fraunces', serif; font-size: 1.18rem; margin: 0 0 .4rem; font-weight: 600; }
.step p { margin: 0; font-size: 1rem; color: var(--ink-soft); max-width: none; }

/* bibtex */
.bibtex { background: #211d19; color: #e9e1d2; border-radius: 6px; padding: 26px 28px; font-family: 'JetBrains Mono', monospace; font-size: .82rem; line-height: 1.7; overflow-x: auto; position: relative; }
.bibtex .k { color: #d99a6c; }
.bibtex .f { color: #8fb9b2; }
.copy-btn { position: absolute; top: 14px; right: 14px; background: rgba(255,255,255,.08); color: #e9e1d2; border: 1px solid rgba(255,255,255,.18); border-radius: 5px; padding: .4rem .8rem; font-family: 'JetBrains Mono', monospace; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; cursor: pointer; transition: all .2s; }
.copy-btn:hover { background: var(--accent); border-color: var(--accent); }

/* back link */
.backlink { display: inline-flex; align-items: center; gap: .5rem; font-family: 'JetBrains Mono', monospace; font-size: .74rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 1.4rem; }
.backlink:hover { color: var(--accent); text-decoration: none; }

/* ============================================================
   Footer
   ============================================================ */
footer { border-top: 1px solid var(--line); margin-top: 60px; padding: 44px 0 56px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: flex-start; }
footer .fcol h4 { font-family: 'JetBrains Mono', monospace; font-size: .68rem; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); margin: 0 0 .8rem; font-weight: 600; }
footer .fcol a, footer .fcol p { display: block; font-size: .95rem; color: var(--ink-soft); margin: 0 0 .35rem; }
footer .fund { font-size: .82rem; color: var(--ink-soft); font-style: italic; max-width: 44ch; line-height: 1.55; }
footer .copy { font-family: 'JetBrains Mono', monospace; font-size: .68rem; color: var(--rule); letter-spacing: .08em; margin-top: 28px; }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }