/* Twirl — "road journal" theme.
   Warm sand paper + pine green + terracotta, serif display headings,
   rounded cards, soft shadows, a horizon rule. Airy and calm. */

:root {
  --sand: #f7f1e6;
  --panel: #fffdf8;
  --pine: #1f4d45;
  --pine-deep: #143832;
  --terra: #c05f3c;
  --terra-soft: #e7b49c;
  --sky: #7aa6c2;
  --ink: #2a2f2b;
  --muted: #6e7168;
  --faint: #9a9b90;
  --line: #e6ddca;
  --line-2: #d6c9ae;
  --serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--sand); color: var(--ink); font-family: var(--sans); font-size: 17px; line-height: 1.72; -webkit-font-smoothing: antialiased; }
.wrap { max-width: 1000px; margin: 0 auto; padding: 0 24px; }
a { color: var(--terra); text-decoration: none; }
a:hover { color: var(--pine); }

/* ---------- header ---------- */
.site-head { background: var(--panel); border-bottom: 1px solid var(--line); }
.head-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; padding: 16px 24px; }
.brand { display: inline-flex; align-items: baseline; gap: 9px; font-family: var(--serif); font-size: 25px; font-weight: 700; color: var(--pine); letter-spacing: -0.01em; }
.brand:hover { color: var(--terra); }
.brand-mark { align-self: center; width: 12px; height: 12px; border: 3px solid var(--terra); border-radius: 50% 50% 50% 0; transform: rotate(45deg); }
.brand-sub { font-family: var(--sans); font-size: 11px; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--faint); }
.nav { display: flex; flex-wrap: wrap; gap: 18px; font-size: 13px; font-weight: 600; letter-spacing: 0.03em; }
.nav a { color: var(--pine); opacity: 0.8; }
.nav a:hover { color: var(--terra); opacity: 1; }

/* ---------- hero ---------- */
.hero { padding: 50px 0 8px; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--terra); margin: 0 0 14px; }
.hero h1 { font-family: var(--serif); font-size: 42px; line-height: 1.1; margin: 0 0 16px; color: var(--pine-deep); letter-spacing: -0.015em; }
.hero-sub { color: var(--muted); max-width: 46em; font-size: 18px; margin: 0; }
.hero-horizon { height: 5px; margin: 34px 0 4px; border-radius: 3px;
  background: linear-gradient(90deg, var(--pine) 0 42%, var(--sky) 42% 62%, var(--terra-soft) 62% 82%, var(--terra) 82% 100%); }

/* ---------- stages ---------- */
.stage { padding: 34px 0 6px; }
.stage-head { display: flex; align-items: baseline; gap: 12px; }
.stage-no { font-family: var(--serif); font-size: 14px; font-weight: 700; color: var(--terra); border-bottom: 2px solid var(--terra-soft); padding-bottom: 1px; }
.stage-no.big { font-size: 17px; }
.stage-head h2 { margin: 0; font-family: var(--serif); font-size: 26px; }
.stage-head h2 a { color: var(--pine); }
.stage-head h2 a:hover { color: var(--terra); }
.stage-count { margin-left: auto; font-size: 12px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--faint); }
.stage-blurb { color: var(--muted); margin: 8px 0 18px; max-width: 46em; }
.stage-blurb.big { font-size: 18px; }
.stage-intro { padding: 34px 0 8px; }
.stage-intro h1 { font-family: var(--serif); font-size: 34px; margin: 12px 0 8px; color: var(--pine-deep); }

/* ---------- cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; padding-bottom: 10px; }
.card { display: flex; flex-direction: column; gap: 6px; background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px 17px; box-shadow: 0 1px 0 rgba(31,77,69,0.04), 0 8px 20px -16px rgba(31,77,69,0.5); color: var(--ink); transition: transform .12s ease, box-shadow .12s ease; }
.card:hover { transform: translateY(-2px); box-shadow: 0 2px 0 rgba(31,77,69,0.05), 0 16px 30px -18px rgba(31,77,69,0.55); border-color: var(--line-2); }
.card-no { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; color: var(--terra); }
.card-name { font-family: var(--serif); font-size: 19px; line-height: 1.28; color: var(--pine-deep); }
.card-meta { font-size: 12px; color: var(--muted); }
.card-meta .dot { color: var(--terra-soft); margin: 0 3px; }
.empty { color: var(--faint); font-style: italic; margin: 4px 0 18px; }

/* ---------- article ---------- */
.article { padding: 30px 0 60px; }
.crumbs { font-size: 13px; color: var(--faint); padding: 6px 0 4px; }
.crumbs a { color: var(--terra); }
.crumbs span { margin: 0 8px; color: var(--line-2); }
.art-head { padding: 8px 0 22px; border-bottom: 1px solid var(--line-2); }
.art-no { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--terra); margin-bottom: 10px; }
.art-head h1 { font-family: var(--serif); font-size: 38px; line-height: 1.12; margin: 0; color: var(--pine-deep); letter-spacing: -0.015em; }
.art-head .zh { color: var(--faint); font-size: 16px; margin: 8px 0 0; }

.logbook { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; margin: 26px 0 34px; padding: 18px; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; }
.log-row { display: flex; flex-direction: column; gap: 3px; }
.log-l { font-size: 11px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); }
.log-v { font-family: var(--serif); font-size: 17px; color: var(--pine); }

.timeline { position: relative; }
.milestone { display: grid; grid-template-columns: 46px 1fr; gap: 16px; margin: 0 0 30px; }
.milestone-no { font-family: var(--serif); font-size: 20px; font-weight: 700; color: var(--terra-soft); padding-top: 2px; }
.milestone-body h2 { font-family: var(--serif); font-size: 23px; margin: 0 0 10px; color: var(--pine-deep); }
.milestone-body p { margin: 0 0 14px; }
.milestone-body p:last-child { margin-bottom: 0; }

.related-box { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line-2); }
.related-box h2 { font-family: var(--serif); font-size: 21px; margin: 0 0 14px; color: var(--pine-deep); }
.related { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.related li { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 15px; }
.related a { font-family: var(--serif); font-size: 17px; color: var(--pine); }
.related a:hover { color: var(--terra); }
.related .soon { font-family: var(--serif); font-size: 17px; color: var(--faint); }
.related .soon em { font-family: var(--sans); font-style: normal; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--line-2); margin-left: 6px; }

/* ---------- legal / 404 ---------- */
.legal { padding: 42px 0 60px; max-width: 780px; }
.legal h1 { font-family: var(--serif); font-size: 33px; margin: 4px 0 10px; color: var(--pine-deep); }
.legal h2 { font-family: var(--serif); font-size: 21px; margin: 26px 0 8px; color: var(--pine); }
.legal p, .legal li { color: #414a44; }
.legal ul { padding-left: 22px; }
.notfound { padding: 66px 0 92px; }
.notfound h1 { font-family: var(--serif); font-size: 36px; color: var(--pine-deep); margin: 4px 0 8px; }
.back { margin: 26px 0 0; font-size: 14px; }

/* ---------- footer ---------- */
.site-foot { background: var(--pine-deep); color: #d8e4dd; padding: 30px 0 38px; font-size: 14px; margin-top: 30px; }
.site-foot p { margin: 0 0 10px; max-width: 52em; }
.site-foot a { color: var(--terra-soft); }
.site-foot a:hover { color: #fff; }
.foot-links { display: flex; flex-wrap: wrap; gap: 10px; }
.foot-links span { opacity: 0.5; }
.foot-fine { font-size: 12px; opacity: 0.6; }

@media (max-width: 640px) {
  .hero h1 { font-size: 32px; }
  .art-head h1 { font-size: 29px; }
  .head-row { flex-direction: column; align-items: flex-start; }
  .stage-count { margin-left: 0; }
  .milestone { grid-template-columns: 34px 1fr; gap: 10px; }
}