/* Battle of Ideas — the modern disputation page.
   Neutral by spec §8.8: no red/green, no warm-vs-cool side coding.
   One signal accent (scholarly violet) for signals — never for sides. */

:root {
  --paper: #f6f7f5;
  --paper-raised: #fdfdfc;
  --ink: #1b1e22;
  --ink-2: #4b5158;
  --ink-3: #878e96;
  --rule: #d9dcd7;
  --rule-soft: #e7e9e5;
  --signal: #5c4e9e;
  --signal-soft: #eceafb;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #17181b;
    --paper-raised: #1f2125;
    --ink: #e8e8e4;
    --ink-2: #b3b6ba;
    --ink-3: #7c8188;
    --rule: #34373c;
    --rule-soft: #2a2c30;
    --signal: #a99cf0;
    --signal-soft: #2b2743;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--signal); text-decoration-thickness: 1px; text-underline-offset: 2px; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; border-radius: 2px; }

/* ---------- index ---------- */
.index-page { max-width: 44rem; margin: 0 auto; padding: 4.5rem 1.5rem 3rem; }
.site-title { font-family: var(--serif); font-size: clamp(2.6rem, 7vw, 4.2rem); font-weight: 500; letter-spacing: -0.015em; }
.site-tagline { font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--signal); margin: 0.6rem 0 1.6rem; }
.site-intro { font-size: 1.06rem; color: var(--ink-2); max-width: 36rem; margin-bottom: 2.8rem; }
.claims { display: flex; flex-direction: column; border-top: 1px solid var(--rule); }
.claim-link {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1.5rem;
  padding: 1.15rem 0.25rem; border-bottom: 1px solid var(--rule);
  text-decoration: none; color: var(--ink);
}
.claim-link:hover .cl-claim { color: var(--signal); }
.cl-claim { font-family: var(--serif); font-size: 1.35rem; line-height: 1.3; transition: color 120ms ease; }
.cl-meta { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-3); white-space: nowrap; }
.method { margin-top: 3.5rem; padding-top: 1.8rem; border-top: 1px solid var(--rule); }
.method h2 { font-family: var(--serif); font-weight: 500; font-size: 1.35rem; margin-bottom: 0.8rem; }
.method p { color: var(--ink-2); font-size: 0.95rem; margin-bottom: 0.8rem; max-width: 40rem; }

/* ---------- claim page ---------- */
.claim-page { max-width: 74rem; margin: 0 auto; padding: 2.2rem 1.5rem 3rem; }
.crumb { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; }
.crumb a { color: var(--ink-3); text-decoration: none; }
.crumb a:hover { color: var(--signal); }
.hero {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(1.9rem, 4.6vw, 3.4rem); line-height: 1.12; letter-spacing: -0.015em;
  text-align: center; max-width: 56rem; margin: 2.4rem auto 1.1rem;
  text-wrap: balance;
}
.eyebrow {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.04em;
  color: var(--ink-3); text-align: center; max-width: 46rem; margin: 0 auto;
  border-top: 1px solid var(--rule-soft); border-bottom: 1px solid var(--rule-soft);
  padding: 0.45rem 0.5rem; cursor: help;
}
.scope { font-size: 0.9rem; color: var(--ink-2); text-align: center; max-width: 42rem; margin: 1rem auto 0; font-style: italic; }

.connector { display: flex; justify-content: center; margin: 1.4rem 0 0; }
.connector svg { width: min(600px, 88vw); height: auto; }
.c-line { stroke: var(--ink-3); stroke-width: 1.2; stroke-dasharray: 4 4; fill: none; }
.c-label { font-family: var(--mono); font-size: 13px; letter-spacing: 0.35em; fill: var(--signal); text-anchor: middle; }

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-top: 0.4rem; }
.col-head {
  font-family: var(--mono); font-weight: 600; font-size: 0.95rem; letter-spacing: 0.3em;
  text-align: center; padding: 0.9rem 0 1.1rem; color: var(--ink);
}
.col-n { color: var(--ink-3); font-weight: 400; letter-spacing: 0; margin-left: 0.4rem; }

.card {
  display: block; width: 100%; text-align: left;
  background: var(--paper-raised); border: 1px solid var(--rule); border-radius: 6px;
  padding: 0.9rem 1rem 0.75rem; margin-bottom: 0.85rem;
  transition: border-color 120ms ease, transform 120ms ease, box-shadow 120ms ease;
}
.card:hover { border-color: var(--signal); transform: translateY(-1px); box-shadow: 0 3px 14px rgba(0,0,0,0.06); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 0.8rem; margin-bottom: 0.55rem; }
.card-title { display: block; font-family: var(--serif); font-size: 1.22rem; font-weight: 600; line-height: 1.25; color: var(--ink); margin-bottom: 0.35rem; }
.card-summary {
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
  font-size: 0.88rem; color: var(--ink-2);
}
.card-foot { display: block; font-family: var(--mono); font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-3); margin-top: 0.65rem; }
.rank { color: var(--signal); margin-right: 0.35rem; }

.conf { display: inline-flex; gap: 3px; align-items: flex-end; height: 14px; }
.conf i {
  width: 5px; height: calc(3px + var(--v) * 2.2px);
  background: var(--ink-3); border-radius: 1px; display: inline-block;
}
.tier {
  font-family: var(--mono); font-size: 0.64rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-2); border: 1px solid var(--rule); border-radius: 3px; padding: 0.15rem 0.4rem;
  white-space: nowrap; cursor: help;
}
.tier sup { color: var(--signal); font-weight: 700; margin-left: 0.25em; }

.col-end {
  font-family: var(--mono); font-size: 0.7rem; color: var(--ink-3); text-align: center;
  border: 1px dashed var(--rule); border-radius: 6px; padding: 0.8rem; letter-spacing: 0.06em;
}
.claim-foot { font-family: var(--mono); font-size: 0.68rem; color: var(--ink-3); text-align: center; margin-top: 1.6rem; }

/* ---------- sticky bar ---------- */
.stickybar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  display: flex; align-items: baseline; gap: 1rem; justify-content: center;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
  padding: 0.5rem 1rem;
  transform: translateY(-100%); transition: transform 180ms ease;
}
.stickybar.visible { transform: translateY(0); }
.sb-claim { font-family: var(--serif); font-size: 0.95rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 60ch; }
.sb-eyebrow { font-family: var(--mono); font-size: 0.62rem; color: var(--ink-3); white-space: nowrap; }

/* ---------- dialogs ---------- */
dialog {
  border: 1px solid var(--rule); border-radius: 10px;
  background: var(--paper-raised); color: var(--ink);
  max-width: 46rem; width: calc(100vw - 2.5rem); max-height: 86vh;
  padding: 0; margin: auto;
}
dialog::backdrop { background: rgba(10, 11, 13, 0.45); backdrop-filter: blur(2px); }
dialog article { padding: 1.4rem 1.7rem 1.7rem; overflow-y: auto; max-height: 86vh; }
dialog header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: 1rem; }
.side-label { font-family: var(--mono); font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--ink-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dlg-close { font-size: 1.5rem; line-height: 1; color: var(--ink-3); padding: 0.1rem 0.45rem; border-radius: 4px; }
.dlg-close:hover { color: var(--ink); background: var(--rule-soft); }
.dlg-badges { margin-bottom: 0.7rem; }
dialog h3 { font-family: var(--serif); font-size: 1.7rem; font-weight: 600; line-height: 1.2; margin-bottom: 0.9rem; }
.dlg-full p { font-family: var(--serif); font-size: 1.04rem; line-height: 1.65; margin-bottom: 0.85rem; }
dialog section { margin-top: 1.4rem; padding-top: 1.1rem; border-top: 1px solid var(--rule-soft); }
.apparatus-h { font-family: var(--mono); font-size: 0.68rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.16em; color: var(--signal); margin-bottom: 0.7rem; }
.asm li, .srcs li { margin: 0 0 0.5rem 1.1rem; font-size: 0.92rem; color: var(--ink-2); }
.src-detail { color: var(--ink-3); font-size: 0.85rem; }
.chip {
  font-family: var(--mono); font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.06em;
  border: 1px solid var(--rule); border-radius: 999px; padding: 0.08rem 0.5rem; white-space: nowrap;
  color: var(--ink-2); vertical-align: middle;
}
.chip-pass-1-checked, .chip-pass-1-corrected { border-color: var(--signal); color: var(--signal); }
.chip-t-testable { border-color: var(--ink-2); }
.rt { border: 1px solid var(--rule); border-left: 3px solid var(--ink-3); border-radius: 6px; padding: 0.75rem 0.95rem; margin-bottom: 0.7rem; }
.rt h4 { font-family: var(--serif); font-size: 1.02rem; font-weight: 600; margin-bottom: 0.3rem; }
.rt p { font-size: 0.9rem; color: var(--ink-2); }
.conf-row { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: 0.3rem 0; }
.conf-name { font-size: 0.9rem; color: var(--ink-2); cursor: help; border-bottom: 1px dotted var(--ink-3); }
.conf-dots { font-size: 0.85rem; letter-spacing: 0.2em; color: var(--signal); }
.prov p { font-size: 0.82rem; color: var(--ink-3); }

/* ---------- tooltips ---------- */
[data-tip] { position: relative; }
[data-tip]:hover::after, [data-tip]:focus-visible::after {
  content: attr(data-tip);
  position: absolute; left: 50%; bottom: calc(100% + 8px); transform: translateX(-50%);
  width: max-content; max-width: 20rem; z-index: 60;
  background: var(--ink); color: var(--paper);
  font-family: var(--sans); font-size: 0.75rem; line-height: 1.45; letter-spacing: 0; text-transform: none; white-space: normal; text-align: left;
  padding: 0.5rem 0.7rem; border-radius: 6px;
  pointer-events: none;
}

/* ---------- footer ---------- */
.colophon { border-top: 1px solid var(--rule); margin-top: 2.5rem; padding: 1.2rem 1.5rem 2rem; text-align: center; }
.colophon p { font-family: var(--mono); font-size: 0.68rem; color: var(--ink-3); }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .cols { grid-template-columns: 1fr; gap: 0.6rem; }
  .col-head { padding: 0.7rem 0 0.6rem; }
  .connector svg { display: none; }
  .connector { margin: 0.6rem 0 0; }
  .sb-eyebrow { display: none; }
  .claim-link { flex-direction: column; gap: 0.25rem; }
}