/* Skated — cool ice-arena theme. Sharp corners, mono labels, discipline badges. */
:root {
  --ice: #eef6f8;
  --ice-2: #dcebee;
  --navy: #12324a;
  --navy-2: #0b2437;
  --ink: #16252f;
  --muted: #5b6f7b;
  --raspberry: #d64550;
  --teal: #2f7f93;
  --gold: #d9a53a;
  --line: #c9dde1;
  --card: #ffffff;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: linear-gradient(180deg, var(--ice) 0%, var(--ice-2) 240px, var(--ice) 240px);
  line-height: 1.6;
  font-size: 16px;
}
a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--raspberry); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  background: var(--navy);
  color: #eaf4f7;
  border-bottom: 3px solid var(--raspberry);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding-top: 12px; padding-bottom: 12px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; }
.brand:hover { color: #fff; }
.brand-mark { color: var(--gold); display: inline-flex; }
.brand-text { font-weight: 700; font-size: 22px; letter-spacing: 0.02em; display: flex; flex-direction: column; line-height: 1; }
.brand-sub { font-family: var(--mono); font-size: 11px; font-weight: 400; color: #9fc3cf; letter-spacing: 0.12em; text-transform: uppercase; margin-top: 4px; }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px; }
.nav-link { color: #cfe3ea; font-size: 14px; padding: 6px 10px; border: 1px solid transparent; }
.nav-link:hover { color: #fff; border-color: rgba(255,255,255,0.25); }
.nav-link.is-active { color: #fff; border-color: var(--gold); background: rgba(217,165,58,0.12); }

/* Hero */
.hero { padding: 48px 0 32px; }
.hero-kicker, .topic-kicker, .cat-head .hero-kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--raspberry);
  margin: 0 0 10px;
}
.hero-title { font-size: 40px; line-height: 1.1; margin: 0 0 14px; color: var(--navy); max-width: 20ch; }
.hero-lede { font-size: 18px; color: var(--muted); max-width: 60ch; margin: 0 0 14px; }
.hero-note { font-size: 14px; color: var(--navy-2); background: #dff0f2; border-left: 3px solid var(--teal); padding: 10px 14px; max-width: 60ch; }

/* Chips */
.chips-wrap { margin: 6px 0 24px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font-size: 13px; padding: 6px 12px; border: 1px solid var(--line); color: var(--navy); background: var(--card); }
.chip:hover { border-color: var(--teal); color: var(--teal); }
.chip.is-active { background: var(--navy); color: #fff; border-color: var(--navy); }

/* Grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; padding-bottom: 56px; }
.card { background: var(--card); border: 1px solid var(--line); border-top: 3px solid var(--teal); padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.card-link { display: flex; align-items: baseline; gap: 10px; }
.card-num { font-family: var(--mono); font-size: 12px; color: var(--raspberry); letter-spacing: 0.08em; }
.card-title { margin: 0; font-size: 19px; color: var(--navy); line-height: 1.25; }
.card-link:hover .card-title { color: var(--raspberry); }
.card-desc { margin: 0; font-size: 14px; color: var(--muted); }
.card-badges, .topic-badges { display: flex; flex-wrap: wrap; gap: 6px; }

/* Badges */
.badge { display: inline-flex; align-items: center; font-size: 11px; border: 1px solid var(--line); background: var(--ice); color: var(--navy-2); }
.badge-key { font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: 0.1em; padding: 3px 7px; background: var(--navy); color: #fff; }
.badge { padding-right: 7px; }
.badge.b-type .badge-key { background: var(--teal); }
.badge.b-cat .badge-key { background: var(--navy); }
.badge.b-diff .badge-key { background: var(--raspberry); }

/* Category header */
.cat-head { padding: 44px 0 20px; }
.cat-title { font-size: 34px; color: var(--navy); margin: 0 0 10px; }
.cat-blurb { font-size: 17px; color: var(--muted); max-width: 62ch; margin: 0; }

/* Topic */
.topic { max-width: 760px; margin: 0 auto; padding-bottom: 56px; }
.topic-head { padding: 40px 0 8px; }
.topic-kicker { display: block; }
.topic-title { font-size: 34px; line-height: 1.15; color: var(--navy); margin: 8px 0 14px; }
.sec { margin: 28px 0; padding: 20px 22px; background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--teal); }
.sec-heading { font-size: 21px; color: var(--navy); margin: 0 0 12px; }
.sec-num { font-family: var(--mono); color: var(--raspberry); font-size: 15px; }
.sec-body p { margin: 0 0 14px; }
.sec-body p:last-child { margin-bottom: 0; }

/* Related */
.related { margin: 8px 0 40px; }
.related-title { font-family: var(--mono); font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--navy); margin: 0 0 12px; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.rel-card { display: flex; flex-direction: column; gap: 4px; background: var(--card); border: 1px solid var(--line); padding: 12px 14px; }
.rel-card:hover { border-color: var(--raspberry); }
.rel-title { font-weight: 600; color: var(--navy); font-size: 15px; }
.rel-meta { font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: 0.04em; }
.rel-card.is-drip { opacity: 0.55; }

/* Legal */
.legal { max-width: 760px; margin: 0 auto; padding: 44px 0 56px; }
.legal-title { font-size: 32px; color: var(--navy); margin: 0 0 18px; }
.legal-body h2 { font-size: 20px; color: var(--navy); margin: 24px 0 8px; }
.legal-body p { margin: 0 0 14px; }
.legal-body a { word-break: break-all; }

/* 404 */
.nf { padding: 64px 0 80px; text-align: center; }
.nf-title { font-size: 36px; color: var(--navy); margin: 0 0 12px; }
.nf-body { color: var(--muted); margin: 0 0 22px; }
.nf-link { display: inline-block; padding: 10px 18px; background: var(--navy); color: #fff; border: 1px solid var(--navy); }
.nf-link:hover { background: var(--raspberry); border-color: var(--raspberry); color: #fff; }

/* Footer */
.site-footer { background: var(--navy-2); color: #cfe3ea; margin-top: 24px; border-top: 3px solid var(--raspberry); }
.site-footer .wrap { padding-top: 24px; padding-bottom: 24px; }
.foot-brand { font-weight: 700; color: #fff; margin: 0 0 8px; }
.foot-links { margin: 0 0 10px; font-size: 14px; }
.foot-links a { color: #9fc3cf; margin: 0 4px; }
.foot-links a:hover { color: #fff; }
.foot-note { margin: 0; font-size: 13px; color: #8fb0bd; max-width: 64ch; }

@media (max-width: 640px) {
  .hero-title { font-size: 30px; }
  .topic-title, .cat-title { font-size: 27px; }
  .header-inner { flex-direction: column; align-items: flex-start; }
}