/* PURE: monochrome, sparse, system stack. No cards, no images.
   Hard rule: no horizontal scroll at any viewport. */
:root {
  --ink: #111;
  --muted: #555;
  --faint: #888;
  --line: #ddd;
  --bg: #fff;
  --mark: #eee;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #e6e6e6; --muted: #a8a8a8; --faint: #7a7a7a;
          --line: #333; --bg: #131313; --mark: #2a2a2a; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  overflow-wrap: anywhere;
}
main { max-width: 44rem; margin: 0 auto; padding: 0 1rem; }
a { color: inherit; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.85em; color: var(--muted); }

/* header / footer */
.site-header nav {
  max-width: 44rem; margin: 0 auto; padding: 0.9rem 1rem;
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
}
.wordmark { font-weight: 700; letter-spacing: 0.18em; text-decoration: none; }
.nav-links { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 0.9rem; }
.nav-links a:hover { color: var(--ink); text-decoration: underline; }
.site-footer { max-width: 44rem; margin: 3rem auto 0; padding: 1rem;
  border-top: 1px solid var(--line); color: var(--faint); font-size: 0.85rem; }

/* home */
.home { text-align: center; padding: 14vh 0 2rem; }
.wordmark-big { font-size: 2.6rem; letter-spacing: 0.28em; margin: 0 0 0.4rem;
  padding-left: 0.28em; font-weight: 700; }
.tagline { color: var(--muted); margin: 0 0 2rem; }
.home-note { color: var(--faint); font-size: 0.9rem; max-width: 34rem; margin: 1.6rem auto 0; }

/* search form */
form[role="search"] { display: flex; gap: 0.5rem; max-width: 34rem; margin: 0 auto; }
form.search-again { margin: 1.2rem 0 0.4rem 0; max-width: none; }
input[type="search"] {
  flex: 1; min-width: 0; font: inherit; color: inherit; background: var(--bg);
  border: 1px solid var(--ink); border-radius: 2px; padding: 0.55rem 0.8rem;
}
input[type="search"]:focus { outline: 2px solid var(--ink); outline-offset: 1px; }
button {
  font: inherit; background: var(--ink); color: var(--bg);
  border: 1px solid var(--ink); border-radius: 2px; padding: 0.55rem 1.1rem; cursor: pointer;
}

/* results */
.meta-line { color: var(--faint); font-size: 0.85rem; margin: 0.3rem 0 1.4rem; }
ol.results { list-style: none; margin: 0; padding: 0; }
.result { margin: 0 0 1.7rem; }
.result-title { font-size: 1.08rem; font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.result-url { color: var(--muted); font-size: 0.85rem; margin: 0.15rem 0; }
.result-snippet { margin: 0.25rem 0; }
mark { background: var(--mark); color: inherit; padding: 0 0.1em; }
.result-tags { margin: 0.25rem 0 0; font-size: 0.8rem; color: var(--muted); }
.tag { border: 1px solid var(--line); border-radius: 2px; padding: 0.05rem 0.4rem; margin-right: 0.5rem; }
.tag-date { color: var(--faint); }

/* why disclosure */
details.why { margin-top: 0.35rem; font-size: 0.85rem; }
details.why summary { cursor: pointer; color: var(--faint); }
details.why summary:hover { color: var(--ink); }
.why-list { list-style: none; margin: 0.5rem 0 0; padding: 0.6rem 0.9rem;
  border-left: 2px solid var(--line); }
.why-list li { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.why-label { color: var(--muted); }
.why-math { font-variant-numeric: tabular-nums; }
.why-total { margin-top: 0.3rem; border-top: 1px solid var(--line); padding-top: 0.3rem; }
.pos { color: inherit; }
.neg { color: inherit; text-decoration: underline dotted; }

.pager { display: flex; gap: 2rem; margin: 1rem 0 2rem; }
.zero { margin: 3rem 0; }
.zero-sub { color: var(--muted); }

/* text pages */
.page h1 { font-size: 1.5rem; }
.page h2 { font-size: 1.1rem; margin-top: 1.8rem; }
.weights-list, .stats-list { list-style: none; padding: 0; }
.weights-list li, .stats-list li { display: flex; gap: 0.8rem; align-items: baseline;
  padding: 0.15rem 0; flex-wrap: wrap; }