:root {
  --logo-green: #277f48;
  --bg: #faf9f7;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --muted: #6b6560;
  --line: #e0dbd6;
  --accent: #277f48;
  --accent-soft: #e3f0e7;
  --code-bg: #eeede8;
  --max: 1080px;
  --text: 680px;
  --sans: "Source Sans 3", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --display: "Jost", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --logo-green: #5fc587;
    --bg: #1a1a1a;
    --surface: #222322;
    --ink: #f5f3f0;
    --muted: #a8a59e;
    --line: #333532;
    --accent: #5fc587;
    --accent-soft: #1f3328;
    --code-bg: #262826;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 var(--sans);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); }
code, .mono { font-family: var(--mono); font-size: .92em; }
code { background: var(--code-bg); padding: .1em .35em; border-radius: 4px; }
pre {
  background: var(--code-bg);
  padding: 14px 16px;
  border-radius: 8px;
  overflow-x: auto;
  font: 14px/1.5 var(--mono);
}
pre code { background: none; padding: 0; }

.wrap { max-width: var(--max); margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.prose { max-width: var(--text); }

/* header */
.top {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.top .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 68px; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; }
.brand-icon { width: 34px; height: 34px; flex: none; }
.brand-icon .e { fill: var(--logo-green); }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font: 200 20px/1 "Jost", var(--sans); letter-spacing: .32em; margin-right: -.32em; }
.brand-tag { font: italic 300 14px/1.2 "Cormorant Garamond", Georgia, serif; letter-spacing: .06em; color: var(--muted); margin-top: 4px; }
@media (max-width: 480px) { .brand-tag { display: none; } .brand-icon { width: 30px; height: 30px; } }
.nav { display: flex; gap: 18px; flex-wrap: wrap; font-size: 15px; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current] { color: var(--ink); }

/* hero */
.hero { padding: 56px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.eyebrow { font: 13px/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 12px; }
h1, h2, h3 { font-family: var(--display); font-weight: 400; }
h1 { font-size: clamp(30px, 4.4vw, 46px); line-height: 1.12; margin: 0 0 18px; letter-spacing: -.01em; }
h2 { font-size: clamp(23px, 2.8vw, 30px); line-height: 1.2; margin: 0 0 14px; }
h3 { font-size: 19px; margin: 0 0 6px; }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 24px; }
.btn {
  display: inline-block; background: var(--accent); color: var(--bg);
  padding: 11px 20px; border-radius: 8px; text-decoration: none; font-weight: 600;
}
.btn-ghost { background: transparent; color: var(--accent); border: 1px solid var(--line); margin-left: 8px; }

.phone {
  border: 1px solid var(--line); border-radius: 22px; overflow: hidden;
  background: var(--surface); box-shadow: 0 10px 30px rgba(0,0,0,.08);
  max-width: 340px; justify-self: center;
}

/* sections */
section.band { padding: 56px 0; border-top: 1px solid var(--line); }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 28px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.muted { color: var(--muted); }
.tag {
  display: inline-block; font: 12px/1 var(--mono); padding: 5px 8px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); vertical-align: middle; margin-left: 6px;
}

.steps { counter-reset: s; list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.steps li { counter-increment: s; padding-left: 44px; position: relative; }
.steps li::before {
  content: counter(s); position: absolute; left: 0; top: 0;
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent-soft); color: var(--accent);
  font: 600 14px/30px var(--mono); text-align: center;
}

table.spec { border-collapse: collapse; width: 100%; font-size: 15px; margin-top: 20px; }
table.spec th, table.spec td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.spec th { font-weight: 600; width: 34%; }

.notes { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 18px; }
.notes a { font-weight: 600; text-decoration: none; }
.notes p { margin: 4px 0 0; color: var(--muted); font-size: 16px; }

/* article */
article { padding: 48px 0 64px; }
article h2 { margin-top: 40px; font-size: 24px; }
article p, article li { max-width: var(--text); }
.meta { font: 14px/1.4 var(--mono); color: var(--muted); margin-bottom: 28px; }
figure { margin: 28px 0; }
figcaption { font-size: 14px; color: var(--muted); margin-top: 8px; }
.callout { border-left: 3px solid var(--accent); padding: 4px 0 4px 16px; color: var(--muted); max-width: var(--text); }

/* footer */
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--muted); }

@media (max-width: 820px) {
  body { font-size: 16px; }
  .hero { padding: 36px 0 28px; }
  .hero .wrap, .grid2 { grid-template-columns: 1fr; gap: 32px; }
  .grid3 { grid-template-columns: 1fr; }
  .wrap { padding-left: 16px; padding-right: 16px; }
  .btn-ghost { margin: 10px 0 0; }
  table.spec th { width: 40%; }
}

/* concept page */
.record {
  margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 22px 20px; font-size: 13px; line-height: 1.8; box-shadow: 0 10px 30px rgba(0,0,0,.06);
  white-space: pre; overflow-x: auto;
}
.record .k { color: var(--muted); }
.record .v { color: var(--accent); font-weight: 600; }
.grid2x2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 28px; }
.card-link { text-decoration: none; color: inherit; display: block; border-color: var(--accent); }
.card-link:hover { box-shadow: 0 6px 20px rgba(0,0,0,.08); }
.card .tag { margin: 0 0 12px; }
.card-link .more { display: inline-block; margin-top: 14px; color: var(--accent); font-weight: 600; font-size: 15px; }
.tag-ok { background: #e3f3e8; color: #1e6b3a; }
@media (prefers-color-scheme: dark) { .tag-ok { background: #183223; color: #8fd3a6; } }
@media (max-width: 820px) {
  .grid2x2 { grid-template-columns: 1fr; }
  .record { font-size: 12px; padding: 16px 14px; }
}

/* mobile nav */
@media (max-width: 600px) {
  .top .wrap { position: relative; padding-top: 10px; padding-bottom: 6px; gap: 6px; }
  .nav { flex-wrap: nowrap; overflow-x: auto; width: 100%; gap: 16px; font-size: 14px; padding-bottom: 6px; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .nav::-webkit-scrollbar { display: none; }
  .nav a { white-space: nowrap; }
  .nav a[hreflang] { position: absolute; top: 22px; right: 16px; }
}

/* fit list */
ul.fit { padding-left: 1.2em; margin: 14px 0; }
ul.fit li { margin: 8px 0; }
.cta-band { background: var(--surface); }
.cta-band .lead { margin: 0 0 18px; }
figcaption.muted { font-size: 14px; margin-top: 8px; }
@media (max-width: 600px) { .phone { max-width: 100%; } }