:root {
  --bg: #ffffff;
  --fg: #14161a;
  --muted: #5b6472;
  --line: #e3e7ec;
  --accent: #1f6feb;
  --accent-soft: #eef4ff;
  --card: #f7f9fb;
  --max: 940px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --fg: #e8ecf1;
    --muted: #98a3b3;
    --line: #232a33;
    --accent: #6ea8ff;
    --accent-soft: #16202e;
    --card: #161b22;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }

/* ---------- header ---------- */
header {
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  z-index: 50;
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 62px; gap: 16px; }
.brand { font-weight: 700; letter-spacing: -0.02em; font-size: 17px; color: var(--fg); text-decoration: none; white-space: nowrap; }
.brand span { color: var(--accent); }
.nav ul { display: flex; gap: 22px; list-style: none; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--fg); }

/* ---------- hero ---------- */
.hero { padding: 74px 0 46px; border-bottom: 1px solid var(--line); }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--accent);
  background: var(--accent-soft); padding: 5px 11px; border-radius: 999px; margin-bottom: 18px;
}
h1 { font-size: clamp(30px, 5.4vw, 46px); line-height: 1.12; letter-spacing: -0.03em; margin-bottom: 18px; }
.lede { font-size: clamp(17px, 2.3vw, 19px); color: var(--muted); max-width: 640px; }

.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.btn {
  display: inline-block; padding: 11px 20px; border-radius: 8px;
  text-decoration: none; font-weight: 600; font-size: 15px; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { border-color: var(--line); color: var(--fg); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- sections ---------- */
section { padding: 54px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: 0; }
h2 { font-size: clamp(21px, 3.2vw, 26px); letter-spacing: -0.02em; margin-bottom: 8px; }
.sub { color: var(--muted); margin-bottom: 26px; max-width: 620px; }
h3 { font-size: 17px; margin-bottom: 6px; letter-spacing: -0.01em; }

/* ---------- stats ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-top: 34px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 15px 16px; }
.stat b { display: block; font-size: 25px; letter-spacing: -0.02em; line-height: 1.15; }
.stat span { font-size: 12.5px; color: var(--muted); }

/* ---------- cards ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(272px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card p { color: var(--muted); font-size: 15px; }
.card ul { margin: 10px 0 0 18px; color: var(--muted); font-size: 14.5px; }
.card li { margin-bottom: 4px; }

/* ---------- case studies ---------- */
.case { padding: 28px 0; border-bottom: 1px solid var(--line); }
.case:last-child { border-bottom: 0; }
.case h3 { font-size: 20px; margin-bottom: 4px; }
.case .meta { font-size: 13.5px; color: var(--accent); margin-bottom: 12px; font-weight: 600; }
.case p { color: var(--muted); margin-bottom: 12px; }
.case p strong { color: var(--fg); font-weight: 600; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.tag { font-size: 12.5px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; }

/* ---------- contact ---------- */
.contact-list { list-style: none; display: grid; gap: 14px; margin-top: 22px; }
.contact-list li { display: flex; gap: 12px; align-items: baseline; flex-wrap: wrap; }
.contact-list .k { font-weight: 600; min-width: 84px; }
.contact-list a { color: var(--accent); text-decoration: none; word-break: break-word; }
.contact-list a:hover { text-decoration: underline; }

/* ---------- footer ---------- */
footer { padding: 30px 0 44px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }
.foot-row { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }

.prose p { margin-bottom: 14px; color: var(--muted); }
.prose p strong { color: var(--fg); font-weight: 600; }

@media (max-width: 560px) {
  .hero { padding: 48px 0 34px; }
  .nav { height: auto; padding: 12px 0; flex-direction: column; align-items: flex-start; }
  .nav ul { gap: 16px; }
}

/* ---------- articles ---------- */
.article { max-width: 720px; }
.article .kicker { font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.article h1 { font-size: clamp(26px, 4.4vw, 36px); margin-bottom: 12px; }
.article .standfirst { font-size: 18px; color: var(--muted); margin-bottom: 0; }
.article h2 { margin: 36px 0 12px; font-size: 21px; }
.article h3 { margin: 26px 0 8px; font-size: 17px; }
.article p { margin-bottom: 15px; color: var(--fg); }
.article ul, .article ol { margin: 0 0 16px 20px; color: var(--fg); }
.article li { margin-bottom: 7px; }
.article strong { font-weight: 650; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .88em; background: var(--card);
  border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px;
}
pre {
  background: var(--card); border: 1px solid var(--line); border-radius: 9px;
  padding: 15px 17px; overflow-x: auto; margin: 0 0 18px;
}
pre code { background: none; border: 0; padding: 0; font-size: 13px; line-height: 1.6; }

.callout {
  border-left: 3px solid var(--accent); background: var(--accent-soft);
  padding: 14px 18px; border-radius: 0 8px 8px 0; margin: 0 0 20px;
}
.callout p { margin: 0; }
.callout p + p { margin-top: 10px; }

/* higher specificity than `.article ul` / `.article a`, which would otherwise win */
ul.note-list, .article ul.note-list {
  list-style: none; margin: 0 0 8px; padding: 0; display: grid; gap: 0;
}
ul.note-list li, .article ul.note-list li { margin: 0; }
.article .note-list a, .note-list a {
  display: block; padding: 17px 0; border-bottom: 1px solid var(--line);
  text-decoration: none; color: var(--fg);
}
.article .note-list a:hover, .note-list a:hover { color: var(--accent); }
.note-list .t {
  font-weight: 650; font-size: 16.5px; display: block; margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.note-list .d { color: var(--muted); font-size: 14.5px; display: block; line-height: 1.5; }
.area {
  font-size: 12px; text-transform: uppercase; letter-spacing: .07em;
  color: var(--accent); font-weight: 700; margin: 34px 0 2px;
}
.area:first-child { margin-top: 0; }

.backlink { display: inline-block; margin-top: 34px; color: var(--muted); text-decoration: none; font-size: 15px; }
.backlink:hover { color: var(--accent); }
.article a { color: var(--accent); }