/* Aquafox — cat behaviour field notes. Cool slate / teal ledger look, mono labels, hairlines. */

:root {
  --ink: #14232b;
  --ink-2: #485f6a;
  --ink-3: #7d919a;
  --paper: #eef3f5;
  --panel: #ffffff;
  --panel-2: #f6fafb;
  --line: #cfdbe0;
  --line-2: #e2ebee;
  --accent: #1f6f78;
  --accent-soft: #d7ecec;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", ui-monospace, "Cascadia Code", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.66;
  font-size: 16.5px;
}
a { color: inherit; }
.shell { max-width: 1060px; margin: 0 auto; padding: 0 26px; }
.shell.narrow { max-width: 760px; }

/* categories accent via data -- unused var fallback */
.accent-understanding-your-cat { --c: #1f6f78; }
.accent-play-enrichment { --c: #6a4fa3; }
.accent-home-environment { --c: #2f7d4f; }
.accent-daily-habits-grooming { --c: #a97912; }
.accent-multi-cat-social-life { --c: #b04a5a; }

/* ---------- header rail ---------- */
.rail { background: #16242c; color: #dbe7ea; }
.rail-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 26px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-mark {
  width: 22px; height: 22px; display: inline-block; flex: none;
  background: var(--accent);
  -webkit-mask: conic-gradient(from 200deg at 50% 60%, #000 0 55%, transparent 55%) , radial-gradient(circle at 50% 62%, #000 42%, transparent 44%);
  mask: radial-gradient(circle at 50% 62%, #000 44%, transparent 46%),
        conic-gradient(from 130deg at 30% 40%, #000 0 24%, transparent 24% 76%, #000 76% 100%),
        conic-gradient(from 230deg at 70% 40%, #000 0 24%, transparent 24% 76%, #000 76% 100%);
}
.brand-name { font-weight: 800; letter-spacing: .16em; font-size: 1.02rem; }
.brand-tag { font-family: var(--mono); font-size: .62rem; letter-spacing: .18em; text-transform: uppercase; color: #8fb0b8; }
.railnav { display: flex; gap: 16px; flex-wrap: wrap; font-family: var(--mono); font-size: .78rem; letter-spacing: .04em; }
.railnav a { color: #b7cbd1; text-decoration: none; padding: 3px 0; border-bottom: 1px solid transparent; }
.railnav a:hover { color: #fff; border-bottom-color: var(--accent); }

/* ---------- masthead ---------- */
.masthead { padding: 56px 0 34px; border-bottom: 2px solid var(--ink); }
.kicker { font-family: var(--mono); font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); margin: 0 0 14px; }
.masthead h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.08; margin: 0 0 16px; letter-spacing: -.02em; font-weight: 800; }
.lede { font-size: 1.1rem; color: var(--ink-2); max-width: 62ch; margin: 0; }
.signal { display: flex; align-items: flex-end; gap: 6px; margin-top: 22px; height: 26px; }
.signal i { width: 8px; background: var(--accent-soft); display: block; }
.signal i:nth-child(1) { height: 8px; }
.signal i:nth-child(2) { height: 14px; }
.signal i:nth-child(3) { height: 22px; background: var(--accent); }
.signal i:nth-child(4) { height: 18px; }
.signal i:nth-child(5) { height: 11px; }
.signal i:nth-child(6) { height: 6px; }

/* ---------- chapter logs ---------- */
.log { display: grid; grid-template-columns: 300px 1fr; gap: 34px; padding: 34px 0; border-bottom: 1px solid var(--line); }
.log-head { display: flex; gap: 12px; flex-direction: column; }
.log-no { font-family: var(--mono); font-size: .8rem; color: var(--ink-3); letter-spacing: .1em; }
.log-head h2 { font-size: 1.5rem; margin: 0; line-height: 1.15; font-weight: 800; }
.log-head h2 a { text-decoration: none; }
.log-head h2 a:hover { color: var(--accent); }
.log-blurb { color: var(--ink-2); margin: 0; font-size: .96rem; }
.log-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0 26px; }
.log-list li { border-top: 1px solid var(--line); }
.log-list li:first-child { border-top: none; }
.log-list a { display: flex; flex-direction: column; gap: 2px; padding: 11px 0; text-decoration: none; }
.log-list a:hover .li-name { color: var(--accent); }
.li-name { font-weight: 700; line-height: 1.3; }
.li-zh { font-size: .78rem; color: var(--ink-3); }
.log-list.big { grid-template-columns: 1fr 1fr; }

/* ---------- article layout ---------- */
.note-layout { display: grid; grid-template-columns: 286px 1fr; gap: 44px; align-items: start; padding-bottom: 40px; }
.fieldcard {
  position: sticky; top: 20px; margin-top: 34px;
  border: 1px solid var(--line); background: var(--panel); border-top: 3px solid var(--accent);
}
.fc-head { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.fc-tag { font-family: var(--mono); font-size: .64rem; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); }
.fc-slug { font-family: var(--mono); font-size: .66rem; color: var(--ink-3); }
.fc-facts { margin: 0; }
.fc-row { display: grid; grid-template-columns: 1fr; gap: 2px; padding: 10px 14px; border-bottom: 1px solid var(--line-2); }
.fc-row:last-child { border-bottom: none; }
.fc-row dt { font-family: var(--mono); font-size: .64rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.fc-row dd { margin: 0; font-weight: 600; font-size: .96rem; }
.fc-rel { padding: 12px 14px 14px; border-top: 1px solid var(--line); background: var(--panel-2); }
.fc-rel ul { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.fc-rel a { text-decoration: none; font-size: .92rem; color: var(--ink-2); }
.fc-rel a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

.crumb { font-family: var(--mono); font-size: .74rem; color: var(--ink-3); margin: 34px 0 8px; }
.crumb span { margin: 0 7px; }
.crumb a { text-decoration: none; color: var(--ink-2); }
.crumb a:hover { color: var(--accent); }
.note h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); line-height: 1.12; margin: 0 0 8px; letter-spacing: -.015em; font-weight: 800; }
.zh { font-size: .96rem; color: var(--ink-3); margin: 0 0 16px; }
.note .lede { margin-bottom: 30px; }

.part { margin: 0 0 32px; padding-left: 22px; border-left: 2px solid var(--line); }
.part h2 { display: flex; gap: 12px; align-items: baseline; font-size: 1.24rem; margin: 0 0 12px; font-weight: 800; }
.part-no { font-family: var(--mono); font-size: .76rem; color: var(--accent); }
.part p { margin: 0 0 13px; color: #253239; }
.part p:last-child { margin-bottom: 0; }

.note-rel { margin-top: 40px; padding-top: 20px; border-top: 2px solid var(--ink); }
.note-rel h2 { font-size: 1.05rem; margin: 0 0 12px; font-weight: 800; }
.note-rel ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 8px; }
.note-rel a { display: block; padding: 9px 12px; border: 1px solid var(--line); text-decoration: none; background: var(--panel); font-size: .94rem; font-weight: 600; }
.note-rel a:hover { border-color: var(--accent); color: var(--accent); }

.back { margin-top: 26px; font-family: var(--mono); font-size: .84rem; }
.back a { text-decoration: none; }
.back a:hover { color: var(--accent); }

/* ---------- legal / 404 ---------- */
.legal-page, .nope { }
.prose { margin-top: 26px; }
.prose p { margin: 0 0 15px; }
.prose h2 { font-size: 1.12rem; margin: 24px 0 8px; font-weight: 800; }
.narrow h1 { font-size: 2.1rem; margin: 0 0 6px; font-weight: 800; letter-spacing: -.015em; }
.narrow .lede { margin-top: 10px; }

/* ---------- footer ---------- */
.foot { background: #16242c; color: #c3d4d9; margin-top: 56px; }
.foot .shell { padding-top: 28px; padding-bottom: 24px; }
.foot-note { margin: 0 0 12px; max-width: 70ch; font-size: .94rem; }
.foot-links { display: flex; gap: 10px; flex-wrap: wrap; margin: 0 0 12px; }
.foot-links a { color: #e6f0f2; text-decoration: none; }
.foot-links a:hover { border-bottom: 1px solid var(--accent); }
.foot-links span { color: #5b7a82; }
.foot-fine { font-family: var(--mono); font-size: .74rem; color: #7f9aa1; margin: 0; letter-spacing: .04em; }

@media (max-width: 860px) {
  .log, .note-layout { grid-template-columns: 1fr; gap: 20px; }
  .fieldcard { position: static; margin-top: 24px; }
  .log-list.big { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .shell { padding: 0 18px; }
  .rail-in { padding: 12px 18px; }
  .railnav { gap: 11px; font-size: .72rem; }
}