/* Percept-V — project page styles */

:root {
  --bg:        #ffffff;
  --bg-alt:    #f7f8fa;
  --bg-card:   #ffffff;
  --fg:        #1a1c20;
  --fg-soft:   #55595f;
  --fg-faint:  #868b93;
  --line:      #e3e6ea;
  --line-soft: #eef0f3;
  --accent:    #2f5fd0;
  --accent-bg: #eaf0fd;
  --good:      #1f8a4c;
  --good-bg:   #e6f5ec;
  --bad:       #c0392b;
  --bad-bg:    #fbeae8;
  --warn-bg:   #fdf6e0;
  --warn-line: #e9d799;
  --shadow:    0 1px 2px rgba(16,20,28,.05), 0 4px 16px rgba(16,20,28,.05);
  --radius:    10px;
  --maxw:      1120px;
}

:root[data-theme="dark"],
html:not([data-theme="light"]) body.dark-auto {
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        #101317;
    --bg-alt:    #161a20;
    --bg-card:   #1a1f26;
    --fg:        #e6e9ee;
    --fg-soft:   #a8aeb8;
    --fg-faint:  #79808b;
    --line:      #2a3038;
    --line-soft: #21262d;
    --accent:    #7aa2f7;
    --accent-bg: #1c2740;
    --good:      #5ec98a;
    --good-bg:   #16301f;
    --bad:       #f08a7e;
    --bad-bg:    #331b19;
    --warn-bg:   #2b2716;
    --warn-line: #55491f;
    --shadow:    0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg:        #101317;
  --bg-alt:    #161a20;
  --bg-card:   #1a1f26;
  --fg:        #e6e9ee;
  --fg-soft:   #a8aeb8;
  --fg-faint:  #79808b;
  --line:      #2a3038;
  --line-soft: #21262d;
  --accent:    #7aa2f7;
  --accent-bg: #1c2740;
  --good:      #5ec98a;
  --good-bg:   #16301f;
  --bad:       #f08a7e;
  --bad-bg:    #331b19;
  --warn-bg:   #2b2716;
  --warn-line: #55491f;
  --shadow:    0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 70px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .89em;
  background: var(--line-soft);
  padding: .1em .38em;
  border-radius: 4px;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 800px; }

/* ── top bar ─────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner { display: flex; align-items: center; gap: 18px; height: 54px; }
.brand { font-weight: 700; letter-spacing: -.01em; color: var(--fg); }
.brand:hover { text-decoration: none; color: var(--accent); }
.topnav { display: flex; gap: 18px; margin-left: auto; flex-wrap: wrap; }
.topnav a { color: var(--fg-soft); font-size: 14px; }
.topnav a:hover { color: var(--accent); text-decoration: none; }
.theme-toggle {
  background: none; border: 1px solid var(--line); color: var(--fg-soft);
  width: 30px; height: 30px; border-radius: 8px; cursor: pointer; font-size: 14px;
  display: grid; place-items: center; flex: none;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ── hero ────────────────────────────────────────────── */
.hero { padding: 64px 0 44px; text-align: center; }
.venue {
  display: inline-block; margin: 0 0 18px;
  font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-bg);
  padding: 5px 12px; border-radius: 999px;
}
.title {
  margin: 0 0 24px; font-size: clamp(28px, 4.4vw, 46px); line-height: 1.18;
  font-weight: 700; letter-spacing: -.022em;
}
.title-sub { font-weight: 600; color: var(--fg-soft); font-size: .82em; }

.authors {
  display: flex; flex-wrap: wrap; gap: 6px 18px; justify-content: center;
  font-size: 17px; margin-bottom: 10px;
}
.authors span { color: var(--fg); }
.authors sup { color: var(--fg-faint); font-size: 11px; }
.affil {
  display: flex; flex-wrap: wrap; gap: 4px 20px; justify-content: center;
  color: var(--fg-soft); font-size: 14.5px;
}
.affil sup { font-size: 11px; }

.buttons { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 30px 0 0; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--fg); color: var(--bg);
  padding: 9px 20px; border-radius: 999px;
  font-size: 15px; font-weight: 500;
  transition: transform .12s ease, opacity .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); opacity: .88; }
.btn .ico { font-size: 14px; }
.btn.pending {
  background: none; color: var(--fg-faint);
  border: 1px dashed var(--line); cursor: default; pointer-events: none;
}
.btn.pending::after { content: "soon"; font-size: 10.5px; letter-spacing: .05em; text-transform: uppercase; opacity: .8; }
.btn-note { font-size: 12.5px; color: var(--fg-faint); margin: 12px 0 0; }

.tagline {
  max-width: 700px; margin: 34px auto 0;
  color: var(--fg-soft); font-size: 17.5px; line-height: 1.6;
}
.tagline strong { color: var(--fg); }

/* ── stats band ──────────────────────────────────────── */
.stats-band { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-alt); }
.stats { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 0; padding: 26px 24px; }
.stat { flex: 1 1 150px; text-align: center; padding: 4px 14px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat-n { font-size: 30px; font-weight: 700; letter-spacing: -.025em; line-height: 1.15; }
.stat-n .pc { font-size: .58em; font-weight: 600; margin-left: 1px; }
.stat-l { font-size: 12.5px; color: var(--fg-soft); margin-top: 2px; }
.stat.hi .stat-n { color: var(--good); }
.stat.lo .stat-n { color: var(--bad); }

/* ── sections ────────────────────────────────────────── */
.section { padding: 68px 0; }
.section.alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

h2 {
  font-size: clamp(23px, 3vw, 30px); font-weight: 700; letter-spacing: -.018em;
  margin: 0 0 16px;
}
h3 { font-size: 18.5px; font-weight: 650; letter-spacing: -.01em; margin: 0 0 10px; }
h3.mt { margin-top: 46px; }
h4 { font-size: 15.5px; font-weight: 650; margin: 0 0 6px; }

.lead { color: var(--fg-soft); font-size: 17px; max-width: 780px; margin: 0 0 30px; }
.note { color: var(--fg-soft); font-size: 15px; max-width: 800px; margin: 0 0 20px; }
.cap {
  font-size: 13.5px; color: var(--fg-faint); margin: 12px 0 0;
  text-align: center; max-width: 820px; margin-left: auto; margin-right: auto;
}
.cap strong { color: var(--fg-soft); }

.findings { margin: 0; padding-left: 20px; }
.findings li { margin-bottom: 10px; color: var(--fg-soft); }
.findings strong { color: var(--fg); }

/* ── teaser grid ─────────────────────────────────────── */
.teaser-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: 18px;
}
.tcard {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; display: flex; flex-direction: column; box-shadow: var(--shadow);
}
.tcard-skill {
  font-size: 12px; font-weight: 700; letter-spacing: .045em; text-transform: uppercase;
  color: var(--accent); text-align: center; margin-bottom: 10px;
}
.tcard-q {
  background: var(--warn-bg); border: 1px solid var(--warn-line);
  border-radius: 7px; padding: 8px 10px; font-size: 12.8px; line-height: 1.45; color: var(--fg);
}
.tcard-img {
  flex: 1; display: grid; place-items: center; min-height: 150px;
  background: #fff; border-radius: 7px; padding: 10px; margin: 10px 0 5px;
}
.tcard-img img { max-width: 100%; max-height: 190px; object-fit: contain; cursor: zoom-in; }
.tcard-img.tall img { max-height: 260px; }
.ans {
  border-radius: 7px; padding: 6px 10px; font-size: 12.5px; text-align: center;
  margin-top: 5px; word-break: break-word; line-height: 1.4;
}
.ans.gold { background: var(--good-bg); border: 1px solid color-mix(in srgb, var(--good) 40%, transparent); color: var(--good); }
.ans.pred-ok { background: var(--good-bg); border: 1px solid color-mix(in srgb, var(--good) 40%, transparent); color: var(--good); }
.ans.pred-bad { background: var(--bad-bg); border: 1px solid color-mix(in srgb, var(--bad) 40%, transparent); color: var(--bad); }
.ans b { font-weight: 650; }

/* ── cards ───────────────────────────────────────────── */
.cards-3 {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px;
}
.card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px;
}
.card p { margin: 0; color: var(--fg-soft); font-size: 14.8px; }
.card.accent { border-top: 3px solid var(--accent); }
.card-tag {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 6px;
}

.callouts {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px; margin-top: 26px;
}
.callout {
  border-left: 3px solid var(--accent); padding: 4px 0 4px 16px;
}
.callout p { margin: 0; color: var(--fg-soft); font-size: 14.6px; }
.callouts + .note { margin-top: 26px; }

/* ── skill table ─────────────────────────────────────── */
.skill-table { display: grid; gap: 8px; }
.srow {
  display: grid; grid-template-columns: 250px 1fr; gap: 16px; align-items: start;
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 13px 16px;
}
.srow-name { font-weight: 620; font-size: 15px; }
.srow-name .abbr {
  display: inline-block; font-size: 11px; font-weight: 700; color: var(--accent);
  background: var(--accent-bg); border-radius: 4px; padding: 1px 6px; margin-left: 6px;
  vertical-align: 1px;
}
.srow-blurb { font-size: 13px; color: var(--fg-faint); font-weight: 400; margin-top: 2px; }
.srow-doms { display: flex; flex-wrap: wrap; gap: 6px; }
.dtag {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px; background: var(--line-soft); color: var(--fg-soft);
  padding: 2px 8px; border-radius: 5px; border: 1px solid transparent;
  cursor: pointer;
}
.dtag:hover { border-color: var(--accent); color: var(--accent); }

/* ── generic tables ──────────────────────────────────── */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.tbl {
  width: 100%; border-collapse: collapse; font-size: 14px;
  background: var(--bg-card);
}
.tbl caption {
  caption-side: top; text-align: left; font-size: 13px; color: var(--fg-faint);
  padding-bottom: 6px;
}
.tbl th, .tbl td { padding: 7px 10px; border-bottom: 1px solid var(--line-soft); text-align: left; }
.tbl thead th {
  border-bottom: 1.5px solid var(--line); font-weight: 620; font-size: 13px;
  color: var(--fg-soft); white-space: nowrap; vertical-align: bottom;
  background: var(--bg-card);
}
.tbl .num, .tbl td.num { text-align: right; font-variant-numeric: tabular-nums; }
.tbl .sep { border-left: 1px solid var(--line); }
.tbl tbody tr:hover { background: var(--line-soft); }
.tbl tfoot td { font-weight: 650; border-top: 1.5px solid var(--line); border-bottom: 0; background: var(--bg-alt); }
.tbl.compact { font-size: 13.5px; }
.tbl.compact th, .tbl.compact td { padding: 5px 9px; }
.tbl .rowname { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }
.tbl tr.total td { font-weight: 650; background: var(--bg-alt); border-top: 1.5px solid var(--line); }
.best { font-weight: 700; }

.tbl tr.ft-section td {
  background: var(--accent-bg); color: var(--accent);
  font-size: 12px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  padding: 7px 10px; border-top: 1.5px solid var(--line); border-bottom: 0;
}
.tbl tr.ft-section:hover td { background: var(--accent-bg); }
#ft-table td:nth-child(-n+3) { text-align: center; color: var(--fg-soft); }
#ft-table tr.ft-section td { text-align: left; }

.heat thead th[data-col] { cursor: pointer; user-select: none; }
.heat thead th[data-col]:hover { color: var(--accent); }
.heat thead th .arrow { opacity: .45; font-size: 10px; margin-left: 3px; }
.heat td.cell { position: relative; }
.tag-fam {
  display: block; font-size: 10px; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--fg-faint); font-weight: 500;
}

.two-col { display: grid; grid-template-columns: minmax(240px, .8fr) 1.6fr; gap: 26px; align-items: start; }

/* ── tabs ────────────────────────────────────────────── */
.tabs { display: inline-flex; gap: 4px; background: var(--bg-alt); border: 1px solid var(--line); border-radius: 999px; padding: 3px; margin-bottom: 16px; }
.section.alt .tabs { background: var(--bg); }
.tab {
  border: 0; background: none; color: var(--fg-soft); cursor: pointer;
  padding: 6px 18px; border-radius: 999px; font-size: 14px; font-family: inherit;
}
.tab.active { background: var(--fg); color: var(--bg); }

/* ── filters + domain grid ───────────────────────────── */
.filters {
  display: flex; flex-wrap: wrap; gap: 14px 26px; align-items: flex-end;
  margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--line);
}
.filter-group { display: flex; flex-direction: column; gap: 7px; }
.filter-label {
  font-size: 11px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--fg-faint);
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--line); background: var(--bg); color: var(--fg-soft);
  border-radius: 999px; padding: 4px 12px; font-size: 13px; cursor: pointer; font-family: inherit;
  transition: all .1s ease;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.search {
  border: 1px solid var(--line); background: var(--bg); color: var(--fg);
  border-radius: 8px; padding: 7px 12px; font-size: 14px; font-family: inherit;
  min-width: 200px; margin-left: auto;
}
.search:focus { outline: 2px solid var(--accent-bg); border-color: var(--accent); }

.domain-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.dcard {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column; box-shadow: var(--shadow);
}
.dcard-imgs {
  display: flex; gap: 6px; align-items: center; justify-content: center;
  background: #fff; padding: 12px; height: 158px; border-bottom: 1px solid var(--line);
}
.dcard-imgs img { max-width: 100%; max-height: 134px; object-fit: contain; cursor: zoom-in; }
.dcard-imgs.two img { max-width: calc(50% - 3px); }
.dcard-body { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.dcard-name { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13.5px; font-weight: 600; }
.dcard-meta { display: flex; flex-wrap: wrap; gap: 5px; }
.pill {
  font-size: 10.5px; font-weight: 600; letter-spacing: .03em; padding: 2px 7px; border-radius: 4px;
  background: var(--accent-bg); color: var(--accent);
}
.pill.at { background: var(--line-soft); color: var(--fg-soft); }
.dcard-acc { font-size: 12.5px; color: var(--fg-faint); margin-top: auto; }
.dcard-acc b { color: var(--fg); font-weight: 650; }
.acc-bar { height: 4px; border-radius: 3px; background: var(--line-soft); overflow: hidden; margin-top: 4px; }
.acc-bar span { display: block; height: 100%; background: var(--accent); }
.dcard-toggle {
  border: 0; background: none; color: var(--accent); font-size: 12.5px; cursor: pointer;
  padding: 0; text-align: left; font-family: inherit;
}
.dcard-prompt {
  font-size: 12.5px; color: var(--fg-soft); background: var(--bg-alt);
  border: 1px solid var(--line); border-radius: 7px; padding: 9px 11px; margin: 0;
}
.section.alt .dcard-prompt { background: var(--bg); }
.dcard-prompt ul { margin: 0; padding-left: 15px; }
.dcard-prompt li { margin-bottom: 4px; }
.dcard.flash { animation: flash 1.4s ease; }
@keyframes flash {
  0%, 100% { box-shadow: var(--shadow); }
  25%      { box-shadow: 0 0 0 3px var(--accent); }
}
.empty { text-align: center; color: var(--fg-faint); padding: 40px 0; }

/* ── figures ─────────────────────────────────────────── */
.fig { margin: 0; text-align: center; }
.fig img {
  max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; padding: 8px; cursor: zoom-in;
}
.fig.tight img { padding: 4px; }
.fig figcaption { font-size: 13.5px; color: var(--fg-faint); margin-top: 10px; }
.fig figcaption strong { color: var(--fg-soft); }

/* ── human study ─────────────────────────────────────── */
.human-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
.bars { display: grid; gap: 11px; }
.bar-row { display: grid; grid-template-columns: 110px 1fr 56px; gap: 12px; align-items: center; font-size: 14px; }
.bar-name { color: var(--fg-soft); }
.bar-row.human .bar-name { color: var(--good); font-weight: 650; }
.bar-track { background: var(--line-soft); border-radius: 5px; height: 20px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--accent); border-radius: 5px; }
.bar-row.human .bar-fill { background: var(--good); }
.bar-val { text-align: right; font-variant-numeric: tabular-nums; font-size: 13.5px; }

/* ── accordion ───────────────────────────────────────── */
.accordion { display: grid; gap: 10px; }
.accordion details {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden;
}
.accordion summary {
  cursor: pointer; padding: 15px 18px; list-style: none;
  display: flex; align-items: center; gap: 14px; font-weight: 600; font-size: 15.5px;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after {
  content: "+"; margin-left: auto; color: var(--fg-faint); font-weight: 400; font-size: 20px; line-height: 1;
}
.accordion details[open] summary::after { content: "\2212"; }
.accordion summary:hover { background: var(--line-soft); }
.sum-n {
  font-size: 12px; font-weight: 600; color: var(--accent); background: var(--accent-bg);
  padding: 2px 9px; border-radius: 999px; white-space: nowrap;
}
.acc-body { padding: 0 18px 20px; border-top: 1px solid var(--line-soft); }
.acc-body > p:first-child { margin-top: 16px; color: var(--fg-soft); font-size: 15px; }
.acc-body .fig { margin-top: 20px; }

/* ── bibtex ──────────────────────────────────────────── */
.code-wrap { position: relative; }
pre {
  background: var(--bg-alt); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; overflow-x: auto; margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px; line-height: 1.55;
}
pre code { background: none; padding: 0; font-size: inherit; }
.copy-btn {
  position: absolute; top: 10px; right: 10px;
  border: 1px solid var(--line); background: var(--bg); color: var(--fg-soft);
  border-radius: 6px; padding: 4px 11px; font-size: 12.5px; cursor: pointer; font-family: inherit;
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ── footer ──────────────────────────────────────────── */
.footer { padding: 40px 0; border-top: 1px solid var(--line); text-align: center; color: var(--fg-soft); font-size: 14px; }
.footer p { margin: 0 0 8px; }
.fine { font-size: 12.5px; color: var(--fg-faint); }

/* ── lightbox ────────────────────────────────────────── */
.lightbox {
  position: fixed; inset: 0; z-index: 100; background: rgba(8,10,14,.88);
  display: grid; place-items: center; padding: 40px; cursor: zoom-out;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 100%; max-height: 100%; background: #fff; border-radius: 8px; padding: 10px; }
.lb-close {
  position: absolute; top: 16px; right: 22px; background: none; border: 0;
  color: #fff; font-size: 34px; line-height: 1; cursor: pointer;
}

/* ── responsive ──────────────────────────────────────── */
@media (max-width: 900px) {
  .human-layout, .two-col { grid-template-columns: 1fr; }
  .srow { grid-template-columns: 1fr; gap: 10px; }
  .stat { flex-basis: 33%; border-right: 0; }
}
@media (max-width: 700px) {
  .topnav { display: none; }
  .hero { padding: 44px 0 34px; }
  .section { padding: 48px 0; }
  .wrap { padding: 0 18px; }
  .stat { flex-basis: 50%; }
  .search { margin-left: 0; width: 100%; }
  .bar-row { grid-template-columns: 92px 1fr 48px; }
}

@media print {
  .topbar, .theme-toggle, .filters, .tabs, .copy-btn { display: none; }
  .section.alt { background: none; }
  .accordion details { break-inside: avoid; }
}