/* GGT — Going Green Transport · Market Analysis Hub
   Brand system extracted from the GGT design system (Bricolage Grotesque / Inter / DM Mono,
   forest green + cream + lime + amber). No build step; plain CSS with custom properties. */

:root {
  /* ---- GGT brand palette ---- */
  --ggt-green:        #133f2d;   /* page background (forest green) */
  --ggt-green-deep:   #0f3224;   /* elevated surfaces / top bar */
  --ggt-green-deeper: #0c2a1e;   /* footer / strips */
  --ggt-cream:        #efe8d8;   /* headings + solid fills */
  --ggt-lime:         #bbfd6a;   /* primary accent */
  --ggt-amber:        #c9a66b;   /* secondary accent / mono labels */

  /* ---- Semantic roles ---- */
  --bg:         var(--ggt-green);
  --surface:    rgba(239, 232, 216, .05);   /* panel fill: cream 5% */
  --surface-2:  rgba(239, 232, 216, .08);   /* panel hover */
  --line:       rgba(201, 166, 107, .30);   /* border: amber 30% */
  --line-soft:  rgba(239, 232, 216, .12);
  --ink:        var(--ggt-cream);           /* primary text */
  --ink-body:   rgba(239, 232, 216, .86);   /* body copy */
  --ink-soft:   rgba(239, 232, 216, .62);
  --ink-mute:   rgba(239, 232, 216, .42);
  --accent:     var(--ggt-lime);
  --accent-2:   var(--ggt-amber);

  --radius:  12px;
  --maxw:    1120px;
  --mono:    "DM Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --display: "Bricolage Grotesque", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink-body);
  background:
    radial-gradient(1100px 560px at 88% -12%, rgba(187, 253, 106, .08), transparent 60%),
    radial-gradient(820px 480px at -8% 8%, rgba(201, 166, 107, .07), transparent 55%),
    var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- Mono kicker/eyebrow ---------- */
.kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: .24em; text-transform: uppercase;
  color: var(--accent);
}
.kicker.amber { color: var(--accent-2); }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--ggt-green-deep) 82%, transparent);
  border-bottom: 1px solid var(--line-soft);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 13px; }
.brand .mark {
  width: 34px; height: 34px; border-radius: 9px; flex: 0 0 auto;
  background: var(--ggt-lime);
  display: grid; place-items: center; color: var(--ggt-green); font-family: var(--display);
  font-weight: 800; font-size: 15px; letter-spacing: -.02em;
  box-shadow: 0 6px 18px rgba(0, 0, 0, .35);
}
.brand b { font-family: var(--display); font-weight: 700; color: var(--ink); font-size: 16px; letter-spacing: -.01em; line-height: 1.1; }
.brand small { display: block; font-family: var(--mono); font-weight: 400; color: var(--accent-2); font-size: 10px; letter-spacing: .18em; text-transform: uppercase; margin-top: 2px; }
.topnav a { color: var(--ink-soft); margin-left: 24px; font-size: 14px; }
.topnav a:hover { color: var(--ink); text-decoration: none; }

/* ---------- Hero ---------- */
.hero { padding: 84px 0 44px; }
.hero .kicker { display: inline-block; margin-bottom: 20px; }
.hero h1 {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(36px, 5.6vw, 64px); line-height: 1.02; letter-spacing: -.022em;
  color: var(--ink); margin: 0 0 10px;
}
.hero h1 .hl { color: var(--accent); }
.hero .tagline {
  font-family: var(--mono); font-size: 13px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--accent-2); margin: 0 0 22px;
}
.hero p.lede { font-size: clamp(16px, 2.1vw, 20px); color: var(--ink-body); max-width: 68ch; margin: 0 0 30px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 10px;
  font-weight: 600; font-size: 14px; border: 1px solid transparent; cursor: pointer; font-family: var(--sans);
}
.btn-primary { background: var(--ggt-lime); color: var(--ggt-green); border-color: var(--ggt-lime); }
.btn-primary:hover { text-decoration: none; filter: brightness(1.06); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--surface); }
.btn-ghost:hover { text-decoration: none; border-color: var(--accent-2); }

/* ---------- Sections ---------- */
section.block { padding: 40px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.section-head h2 { font-family: var(--display); font-weight: 700; font-size: 24px; margin: 0; letter-spacing: -.01em; color: var(--ink); }
.section-head .hint { color: var(--accent-2); font-size: 12px; font-family: var(--mono); letter-spacing: .08em; }

/* ---------- Card grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; display: flex; flex-direction: column; gap: 11px;
  transition: border-color .15s, transform .15s, background .15s;
}
.card:hover { border-color: var(--accent); background: var(--surface-2); transform: translateY(-2px); }
.card .tag {
  align-self: flex-start; font-family: var(--mono); font-size: 11px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--accent-2); border: 1px solid var(--line);
  padding: 3px 9px; border-radius: 6px;
}
.card h3 { font-family: var(--display); font-weight: 700; margin: 2px 0 0; font-size: 18px; color: var(--ink); letter-spacing: -.01em; }
.card p { margin: 0; color: var(--ink-soft); font-size: 14px; flex: 1; }
.card .go { font-size: 13px; font-weight: 600; color: var(--accent); font-family: var(--mono); letter-spacing: .04em; }
.card.placeholder { border-style: dashed; opacity: .78; }
.card.placeholder:hover { transform: none; background: var(--surface); border-color: var(--line); }
.card.placeholder .go { color: var(--ink-mute); }

/* Featured card — solid cream fill (mirrors the deck's step cards) */
.card.feature { background: var(--ggt-cream); border-color: var(--ggt-cream); }
.card.feature h3 { color: var(--ggt-green); }
.card.feature p { color: color-mix(in srgb, var(--ggt-green) 78%, transparent); }
.card.feature .tag { color: var(--ggt-green); border-color: color-mix(in srgb, var(--ggt-green) 30%, transparent); }
.card.feature .go { color: var(--ggt-green); }
.card.feature:hover { filter: brightness(.98); border-color: var(--ggt-cream); transform: translateY(-2px); background: var(--ggt-cream); }

/* ---------- Doc page (rendered markdown) ---------- */
.doc { padding: 44px 0 80px; }
.doc-wrap { max-width: 840px; margin: 0 auto; padding: 0 28px; }
.doc-body { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 44px clamp(22px, 5vw, 60px); }
.doc-body h1 { font-family: var(--display); font-weight: 800; font-size: clamp(30px, 4vw, 42px); margin: 0 0 8px; letter-spacing: -.022em; color: var(--ink); }
.doc-body h2 { font-family: var(--display); font-weight: 700; font-size: 25px; margin: 42px 0 12px; padding-top: 14px; border-top: 1px solid var(--line-soft); color: var(--ink); letter-spacing: -.01em; }
.doc-body h3 { font-family: var(--display); font-weight: 700; font-size: 19px; margin: 28px 0 8px; color: var(--ink); }
.doc-body p, .doc-body li { color: var(--ink-body); }
.doc-body strong { color: var(--ink); font-weight: 600; }
.doc-body a { color: var(--accent); }
.doc-body blockquote {
  margin: 18px 0; padding: 12px 18px; border-left: 3px solid var(--accent-2);
  background: rgba(201, 166, 107, .08); border-radius: 0 8px 8px 0; color: var(--ink-body);
}
.doc-body code {
  font-family: var(--mono); font-size: .86em; background: var(--ggt-green-deeper);
  border: 1px solid var(--line-soft); padding: 1px 6px; border-radius: 5px; color: var(--accent-2);
}
.doc-body pre { background: var(--ggt-green-deeper); border: 1px solid var(--line-soft); border-radius: 10px; padding: 16px; overflow: auto; }
.doc-body pre code { border: 0; padding: 0; color: var(--ink-body); }
.doc-body table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14px; }
.doc-body th, .doc-body td { text-align: left; padding: 10px 12px; border: 1px solid var(--line-soft); vertical-align: top; }
.doc-body th { background: var(--ggt-green-deep); color: var(--ink); font-weight: 600; font-family: var(--mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; }
.doc-body hr { border: 0; border-top: 1px solid var(--line-soft); margin: 32px 0; }
.doc-body input[type=checkbox] { margin-right: 8px; accent-color: var(--accent); }
.doc-body ul { padding-left: 22px; }
.backlink { display: inline-flex; gap: 8px; align-items: center; color: var(--ink-soft); font-size: 13px; margin-bottom: 22px; font-family: var(--mono); letter-spacing: .04em; }
.backlink:hover { color: var(--accent); }
.loading { color: var(--ink-mute); font-family: var(--mono); font-size: 14px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line-soft); margin-top: 44px; padding: 30px 0 60px; background: var(--ggt-green-deeper); }
.footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; align-items: center; font-family: var(--mono); font-size: 12px; letter-spacing: .06em; color: var(--accent-2); }
.footer .wrap span.tag-line { color: var(--ink-mute); text-transform: uppercase; letter-spacing: .18em; }

/* ---------- Disclaimer banner ---------- */
.disclaimer {
  background: rgba(201, 166, 107, .08); border: 1px solid var(--line);
  border-left: 3px solid var(--accent-2);
  border-radius: 8px; padding: 12px 16px; font-size: 13px; color: var(--ink-body); margin: 0 0 10px;
}
.disclaimer strong { color: var(--accent-2); }

@media (max-width: 560px) {
  .topnav a:not(:last-child) { display: none; }
  .hero { padding: 56px 0 28px; }
}