/* Kernel autoresearch site: shared tokens, type, layout, figure chrome.
   One idea carries the look: the physical floor is a solid ink rule, drawn on every figure. */

:root {
  color-scheme: light;
  --page: #f4f6f9;
  --surface: #ffffff;
  --ink: #14213d;
  --ink-2: #46506a;
  --muted: #7d8699;
  --rule: #dde2ea;
  --axis: #c3c9d4;
  --grid: #e9edf2;
  --wash: rgba(20, 33, 61, 0.04);
  --ring: rgba(20, 33, 61, 0.10);
  --good: #006300;
  --bad: #b42323;
  --s1: #2a78d6; --s2: #eb6834; --s3: #1baf7a; --s4: #eda100;
  --s5: #e87ba4; --s6: #008300; --s7: #6250d6; --s8: #e34948;
  --seq-1: #cde2fb; --seq-2: #86b6ef; --seq-3: #3987e5; --seq-4: #1c5cab; --seq-5: #0d366b;
  --serif: "Geist", "Inter", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --sans: "Geist", "Inter", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --text-w: 680px;
  --wide-w: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0e1320; --surface: #151c2c; --ink: #e8ecf4; --ink-2: #aeb6c7; --muted: #7f889b;
    --rule: #263048; --axis: #3a4560; --grid: #1f2839; --wash: rgba(232, 236, 244, 0.05);
    --ring: rgba(255, 255, 255, 0.10); --good: #0ca30c; --bad: #e66767;
    --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500;
    --s5: #d55181; --s6: #008300; --s7: #9085e9; --s8: #e66767;
    --seq-1: #104281; --seq-2: #1c5cab; --seq-3: #2a78d6; --seq-4: #6da7ec; --seq-5: #b7d3f6;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0e1320; --surface: #151c2c; --ink: #e8ecf4; --ink-2: #aeb6c7; --muted: #7f889b;
  --rule: #263048; --axis: #3a4560; --grid: #1f2839; --wash: rgba(232, 236, 244, 0.05);
  --ring: rgba(255, 255, 255, 0.10); --good: #0ca30c; --bad: #e66767;
  --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500;
  --s5: #d55181; --s6: #008300; --s7: #9085e9; --s8: #e66767;
  --seq-1: #104281; --seq-2: #1c5cab; --seq-3: #2a78d6; --seq-4: #6da7ec; --seq-5: #b7d3f6;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.68;
  letter-spacing: -0.003em;
  -webkit-font-smoothing: antialiased;
  font-optical-sizing: auto;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--s1); outline-offset: 3px; border-radius: 2px; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* ---------- top bar ---------- */
.bar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--page) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--rule);
  font-family: var(--sans);
}
.bar-in { max-width: var(--wide-w); margin: 0 auto; padding: 0 24px; height: 52px; display: flex; align-items: center; gap: 28px; }
.brand { font-weight: 700; font-size: 15px; letter-spacing: -0.01em; text-decoration: none; display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 18px; height: 18px; display: inline-block; }
.nav { display: flex; gap: 4px; font-size: 14.5px; }
.nav a { text-decoration: none; padding: 6px 10px; border-radius: 6px; color: var(--ink-2); }
.nav a:hover { background: var(--wash); color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); font-weight: 600; background: var(--wash); }
.bar-tail { margin-left: auto; display: flex; gap: 10px; align-items: center; font-size: 13.5px; color: var(--muted); }
.theme-btn { font: inherit; background: none; border: 1px solid var(--rule); color: var(--ink-2); border-radius: 6px; padding: 4px 9px; cursor: pointer; }
@media (max-width: 640px) {
  .bar-in { height: auto; flex-wrap: wrap; gap: 4px 12px; padding: 8px 16px; }
  .brand { font-size: 14px; }
  .nav { order: 3; width: 100%; overflow-x: auto; }
  .nav a { padding: 5px 8px; }
  .bar-tail { margin-left: auto; }
  .wrap { padding: 0 16px; }
}
.tscroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.tscroll table.dt { min-width: 560px; }

/* ---------- reading layout ---------- */
.wrap { max-width: var(--wide-w); margin: 0 auto; padding: 0 24px; }
.col { max-width: var(--text-w); }
.prose p { margin: 0 0 1.05em; }
.prose p, .prose li { hyphens: auto; }
.prose ul, .prose ol { padding-left: 1.2em; margin: 0 0 1.1em; }
.prose li { margin: 0.25em 0; }
.prose strong { font-weight: 600; }
.prose code, code { font-family: var(--mono); font-size: 0.82em; background: var(--wash); padding: 0.08em 0.32em; border-radius: 4px; }

h1, h2, h3, h4 { font-family: var(--sans); color: var(--ink); margin: 0; }
h2 { font-size: 30px; line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; margin: 0 0 18px; }
h3 { font-size: 19px; line-height: 1.3; font-weight: 650; margin: 1.6em 0 0.5em; letter-spacing: -0.005em; }
.lede { font-size: 22px; line-height: 1.5; color: var(--ink-2); }

/* numbered sections: a paper is a sequence, so the number is real information */
.sec { padding: 64px 0 24px; border-top: 1px solid var(--rule); display: grid; grid-template-columns: 72px minmax(0, 1fr); column-gap: 24px; }
.sec-n { font-family: var(--sans); font-weight: 600; font-size: 15px; color: var(--muted); padding-top: 9px; font-variant-numeric: tabular-nums; }
.sec-body { min-width: 0; }
@media (max-width: 760px) {
  .sec { grid-template-columns: 1fr; padding-top: 44px; }
  .sec-n { padding: 0 0 6px; }
  body { font-size: 18px; }
  h2 { font-size: 25px; }
}

/* ---------- hero ---------- */
.hero { padding: 72px 0 28px; }
.hero h1 {
  font-size: clamp(42px, 6.4vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-weight: 650;
  max-width: 15ch;
}
.hero .deck { margin-top: 26px; max-width: 34em; font-size: 22px; line-height: 1.5; color: var(--ink-2); }
.byline { margin-top: 22px; font-family: var(--sans); font-size: 14.5px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 22px; }
.byline b { color: var(--ink-2); font-weight: 600; }

/* ---------- figures ---------- */
.fig { margin: 30px 0 36px; }
.fig-wide { width: 100%; max-width: none; }
.fig-head { font-family: var(--sans); display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 10px; }
.fig-title { font-size: 16.5px; font-weight: 650; letter-spacing: -0.005em; }
.fig-sub { font-size: 14px; color: var(--ink-2); margin-top: 2px; font-weight: 400; }
.fig-tools { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  font-family: var(--sans); font-size: 13px; border: 1px solid var(--rule); background: var(--surface);
  color: var(--ink-2); border-radius: 999px; padding: 4px 11px; cursor: pointer; display: inline-flex; align-items: center; gap: 7px;
}
.chip:hover { border-color: var(--axis); color: var(--ink); }
.chip[aria-pressed="true"] { color: var(--ink); border-color: var(--ink); }
.chip .key { width: 14px; height: 2px; border-radius: 2px; display: inline-block; }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.panel { background: var(--surface); border: 1px solid var(--rule); border-radius: 10px; padding: 18px 18px 10px; position: relative; }
.chart { position: relative; width: 100%; }
.chart svg { display: block; width: 100%; overflow: visible; font-family: var(--sans); }
.cap { font-family: var(--sans); font-size: 13.5px; line-height: 1.5; color: var(--ink-2); margin-top: 10px; max-width: 760px; }
.cap b { color: var(--ink); font-weight: 600; }
.src { font-family: var(--sans); font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.src code { font-size: 11.5px; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-family: var(--sans); font-size: 13px; color: var(--ink-2); margin: 2px 0 8px; }
.legend span { display: inline-flex; align-items: center; gap: 7px; }
.legend i { width: 16px; height: 2px; border-radius: 2px; display: inline-block; }
.legend i.box { width: 10px; height: 10px; border-radius: 2px; }

/* svg chart parts */
.ax text { fill: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.ax line, .ax path { stroke: var(--axis); stroke-width: 1; shape-rendering: crispEdges; }
.gridl { stroke: var(--grid); stroke-width: 1; shape-rendering: crispEdges; }
.floor-rule { stroke: var(--ink); stroke-width: 2; }
.floor-lab { fill: var(--ink); font-size: 12px; font-weight: 600; }
.lab { fill: var(--ink-2); font-size: 12.5px; }
.lab-strong { fill: var(--ink); font-size: 12.5px; font-weight: 600; }
.ann-line { stroke: var(--muted); stroke-width: 1; }
.ann-dot { fill: var(--surface); stroke: var(--ink); stroke-width: 1.5; }
.xhair { stroke: var(--ink); stroke-width: 1; opacity: 0.35; }

.tip {
  position: absolute; pointer-events: none; z-index: 30; min-width: 150px; max-width: 320px;
  background: var(--surface); border: 1px solid var(--rule); border-radius: 8px;
  box-shadow: 0 6px 24px rgba(20, 33, 61, 0.12); padding: 9px 11px; font-family: var(--sans); font-size: 12.5px;
  color: var(--ink-2); opacity: 0; transition: opacity 0.08s;
}
.tip.on { opacity: 1; }
.tip .t-h { color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.tip .t-r { display: flex; align-items: center; gap: 8px; line-height: 1.55; }
.tip .t-r b { color: var(--ink); font-weight: 650; font-variant-numeric: tabular-nums; min-width: 52px; }
.tip .t-k { width: 12px; height: 2px; border-radius: 2px; flex: none; }
.tip .t-n { margin-top: 5px; color: var(--ink-2); font-size: 12px; line-height: 1.4; }

/* table view twin */
details.tv { margin-top: 8px; font-family: var(--sans); font-size: 13px; }
details.tv summary { cursor: pointer; color: var(--muted); list-style: none; display: inline-block; }
details.tv summary::-webkit-details-marker { display: none; }
details.tv summary:hover { color: var(--ink); }
details.tv[open] summary { color: var(--ink); }
.tv-scroll { max-height: 320px; overflow: auto; margin-top: 8px; border: 1px solid var(--rule); border-radius: 8px; }

table.dt { width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: 13.5px; }
table.dt th { text-align: left; font-weight: 600; color: var(--ink-2); font-size: 12.5px; padding: 8px 10px; border-bottom: 1px solid var(--rule); position: sticky; top: 0; background: var(--surface); }
table.dt td { padding: 7px 10px; border-bottom: 1px solid var(--grid); vertical-align: top; }
table.dt td.n, table.dt th.n { text-align: right; font-variant-numeric: tabular-nums; }
table.dt tr:last-child td { border-bottom: 0; }
table.dt tr.hl td { background: var(--wash); }

/* stat row: real headline numbers, not decoration */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin: 8px 0 0; }
.stat { padding: 16px 16px 14px 0; font-family: var(--sans); }
.stat + .stat { padding-left: 16px; border-left: 1px solid var(--rule); }
.stat .v { font-size: 30px; font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; }
.stat .l { font-size: 13.5px; color: var(--ink-2); margin-top: 4px; line-height: 1.35; }
@media (max-width: 760px) { .stat + .stat { border-left: 0; padding-left: 0; } }

/* callouts */
.finding { border-left: 3px solid var(--ink); padding: 4px 0 4px 18px; margin: 22px 0; }
.finding p { margin: 0; }
.note { font-family: var(--sans); font-size: 14px; color: var(--ink-2); background: var(--wash); border-radius: 8px; padding: 12px 14px; margin: 18px 0; line-height: 1.5; }
.tag { font-family: var(--sans); font-size: 11.5px; font-weight: 600; border-radius: 4px; padding: 1px 6px; border: 1px solid var(--rule); color: var(--ink-2); white-space: nowrap; }
.tag.m { border-color: color-mix(in srgb, var(--good) 40%, var(--rule)); color: var(--good); }
.tag.b { border-color: color-mix(in srgb, var(--s4) 50%, var(--rule)); }

/* controls */
.ctl { font-family: var(--sans); display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin: 12px 0 4px; }
.btn {
  font-family: var(--sans); font-size: 14px; font-weight: 600; border-radius: 8px; padding: 8px 14px; cursor: pointer;
  border: 1px solid var(--ink); background: var(--ink); color: var(--surface); text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
}
.btn.ghost { background: transparent; color: var(--ink); }
.btn:hover { opacity: 0.92; }
input[type="range"] { accent-color: var(--ink); width: min(520px, 100%); }
.clock { font-size: 14px; color: var(--ink-2); min-width: 170px; }

.footer { border-top: 1px solid var(--rule); margin-top: 72px; padding: 30px 0 60px; font-family: var(--sans); font-size: 13.5px; color: var(--muted); }
.footer a { color: var(--ink-2); }

pre.code { font-family: var(--mono); font-size: 13px; line-height: 1.55; background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; padding: 14px 16px; overflow-x: auto; color: var(--ink); }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.sans { font-family: var(--sans); }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.nowrap { white-space: nowrap; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* featured articles in the top bar (owner 11-05: "feature the top articles better") */
.nav { align-items: center; }
.nav a[href="society.html"], .nav a[href="discoveries.html"] { font-weight: 650; color: #fff !important; padding: 7px 14px; border-radius: 999px; display: inline-flex; align-items: center; gap: 7px; transition: transform .15s ease, box-shadow .15s ease; }
.nav a[href="society.html"] { background: linear-gradient(135deg, #6D5BFF, #3E7BFA); }
.nav a[href="discoveries.html"] { background: linear-gradient(135deg, #12A594, #2E9E4F); }
.nav a[href="society.html"]:hover, .nav a[href="discoveries.html"]:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 6px 16px -6px rgba(15, 27, 51, .5); }
.nav a[href="society.html"]::before, .nav a[href="discoveries.html"]::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #F0B44C; box-shadow: 0 0 0 3px rgba(240, 180, 76, .25); }
.nav a[href="society.html"][aria-current="page"], .nav a[href="discoveries.html"][aria-current="page"] { color: #fff; box-shadow: 0 0 0 2px var(--ink); }
@media (max-width: 760px) { .nav { overflow-x: auto; } .nav a[href="society.html"], .nav a[href="discoveries.html"] { padding: 6px 11px; } }