:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --ink: #26251e;
  --body: #5a5852;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --success: #1f8a65;
  --error: #cf2d56;
  --tl-thinking: #dfa88f;
  --tl-grep: #9fc9a2;
  --tl-read: #9fbbe0;
  --tl-edit: #c0a8dd;
  --tl-done: #c08532;
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;
  --max: 1200px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--canvas);
  color: var(--body);
  font-family: "Inter", system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

img { max-width: 100%; display: block; }

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

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

h1, h2, h3 {
  color: var(--ink);
  font-weight: 400;
  margin: 0 0 16px;
}

h1 { font-size: 72px; line-height: 1.1; letter-spacing: -2.16px; }
h2 { font-size: 36px; line-height: 1.2; letter-spacing: -0.72px; }
h3 { font-size: 26px; line-height: 1.25; letter-spacing: -0.325px; }

p { margin: 0 0 16px; }

.section { padding: 80px 0; }
.section-tight { padding: 48px 0; }

.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.lead { font-size: 18px; color: var(--body); max-width: 640px; }

/* Top nav */
.top-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.wordmark { font-size: 18px; font-weight: 600; color: var(--ink); letter-spacing: -0.2px; }
.wordmark:hover { text-decoration: none; }
.nav-menu { display: flex; align-items: center; gap: 24px; }
.nav-link { font-size: 14px; font-weight: 500; color: var(--ink); }
.nav-link:hover { color: var(--primary); text-decoration: none; }
.nav-toggle { display: none; flex-direction: column; gap: 4px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); display: block; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 500; cursor: pointer; border: 0; transition: background .15s ease; }
.btn-primary { background: var(--primary); color: var(--on-primary); padding: 10px 18px; height: 40px; border-radius: var(--r-md); }
.btn-primary:hover { background: var(--primary-active); text-decoration: none; }
.btn-ink { background: var(--ink); color: var(--canvas); padding: 12px 20px; height: 44px; border-radius: var(--r-md); }
.btn-ink:hover { text-decoration: none; opacity: .9; }
.btn-secondary { background: var(--surface-card); color: var(--ink); border: 1px solid var(--hairline-strong); padding: 10px 18px; height: 40px; border-radius: var(--r-md); }
.btn-secondary:hover { text-decoration: none; border-color: var(--ink); }
.btn-text { color: var(--ink); font-weight: 500; font-size: 14px; }

/* Hero */
.hero { background: var(--canvas); padding: 88px 0 64px; }
.hero h1 { max-width: 14ch; }
.hero .lead { margin-bottom: 28px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-figure { margin-top: 48px; }
.figure-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.figure-card img { width: 100%; height: 440px; object-fit: cover; }
.figure-caption { font-size: 13px; color: var(--muted); padding: 12px 16px; border-top: 1px solid var(--hairline-soft); }

/* Badge pill */
.badge-pill { display: inline-block; background: var(--surface-strong); color: var(--ink); font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; border-radius: var(--r-pill); padding: 4px 10px; }

/* Section heads */
.section-head { max-width: 720px; margin-bottom: 40px; }

/* Card grid */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.feature-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
}
.feature-card h3 { font-size: 22px; letter-spacing: -0.11px; margin-bottom: 8px; }
.feature-card p { font-size: 16px; color: var(--body); }
.card-thumb { border-radius: var(--r-md); overflow: hidden; margin-bottom: 16px; border: 1px solid var(--hairline); }
.card-thumb img { width: 100%; height: 200px; object-fit: cover; }
.card-meta { font-size: 13px; color: var(--muted); margin-top: auto; padding-top: 12px; }
.card-link { color: var(--primary); font-weight: 500; font-size: 14px; margin-top: 12px; }
.card-link:hover { color: var(--primary-active); }

/* Region list */
.region-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0; border: 1px solid var(--hairline); border-radius: var(--r-lg); overflow: hidden; background: var(--surface-card); }
.region-list li { padding: 20px 24px; border-bottom: 1px solid var(--hairline-soft); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.region-list li:last-child { border-bottom: 0; }
.region-name { color: var(--ink); font-weight: 600; font-size: 16px; }
.region-desc { color: var(--body); font-size: 15px; flex: 1; min-width: 240px; }

/* Spec / code block */
.spec-block {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 20px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
}
.spec-block .k { color: var(--muted); }

/* Article layout */
.article-hero { padding: 56px 0 32px; }
.article-hero h1 { font-size: 56px; letter-spacing: -1.6px; max-width: 18ch; }
.article-body { max-width: 720px; }
.article-body h2 { font-size: 30px; margin-top: 48px; }
.article-body h3 { font-size: 22px; letter-spacing: -0.11px; margin-top: 32px; }
.article-body p { font-size: 16px; line-height: 1.6; letter-spacing: 0.08px; color: var(--body); }
.article-body figure { margin: 32px 0; }
.article-body figure img { width: 100%; border-radius: var(--r-lg); border: 1px solid var(--hairline); }
.article-body figcaption { font-size: 13px; color: var(--muted); margin-top: 8px; }
.article-body ul { padding-left: 20px; color: var(--body); }
.article-body li { margin-bottom: 8px; }
.article-meta { font-size: 13px; color: var(--muted); margin-bottom: 24px; }

.callout {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--tl-done);
  border-radius: var(--r-md);
  padding: 20px 24px;
  margin: 32px 0;
}
.callout p { margin: 0; color: var(--ink); }
.callout .eyebrow { color: var(--tl-done); }

.fact-table { width: 100%; border-collapse: collapse; margin: 24px 0; border: 1px solid var(--hairline); border-radius: var(--r-lg); overflow: hidden; }
.fact-table th, .fact-table td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--hairline-soft); font-size: 15px; }
.fact-table th { background: var(--canvas-soft); color: var(--ink); font-weight: 600; width: 40%; }
.fact-table td { color: var(--body); }
.fact-table tr:last-child th, .fact-table tr:last-child td { border-bottom: 0; }

.related { border-top: 1px solid var(--hairline); padding-top: 32px; margin-top: 56px; }

.source-list { list-style: none; padding: 0; margin: 16px 0 0; }
.source-list li { padding: 8px 0; border-bottom: 1px solid var(--hairline-soft); font-size: 14px; }
.source-list a { color: var(--ink); }
.source-list a:hover { color: var(--primary); }

/* Contact form */
.contact-band { background: var(--canvas); }
.form-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 32px;
  max-width: 640px;
}
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.form-row input {
  width: 100%;
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  padding: 12px 16px;
  height: 44px;
  font-size: 15px;
  font-family: inherit;
}
.form-row input:focus { outline: none; border-color: var(--ink); }
.form-msg { font-size: 14px; margin-top: 12px; min-height: 20px; }
.form-msg.ok { color: var(--success); }
.btn-primary[disabled] { opacity: .7; cursor: progress; }

/* Footer */
.site-footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 64px 0 48px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 32px; }
.footer-head { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin: 0 0 12px; }
.footer-link { display: block; font-size: 14px; color: var(--body); padding: 4px 0; }
.footer-link:hover { color: var(--ink); }
.footer-note { font-size: 14px; color: var(--body); margin-top: 12px; max-width: 32ch; }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--hairline); }
.footer-disclaimer { font-size: 13px; color: var(--muted); max-width: 80ch; }
.footer-copy { font-size: 13px; color: var(--muted-soft); margin: 8px 0 0; }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  left: 24px;
  right: 24px;
  bottom: 24px;
  z-index: 100;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-lg);
  padding: 20px 24px;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  max-width: 920px;
  margin: 0 auto;
}
.cookie-banner.show { display: flex; }
.cookie-text { font-size: 14px; color: var(--body); flex: 1; min-width: 260px; }
.cookie-text a { color: var(--ink); text-decoration: underline; }
.cookie-actions { display: flex; gap: 12px; }

@media (max-width: 1024px) {
  h1 { font-size: 56px; letter-spacing: -1.6px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-menu { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--canvas); border-bottom: 1px solid var(--hairline); padding: 12px 24px; }
  .nav-menu.open { display: flex; }
  .nav-menu .nav-link { padding: 10px 0; border-bottom: 1px solid var(--hairline-soft); }
}

@media (max-width: 640px) {
  h1 { font-size: 32px; letter-spacing: -0.8px; }
  h2 { font-size: 28px; letter-spacing: -0.5px; }
  .article-hero h1 { font-size: 32px; letter-spacing: -0.8px; }
  .section { padding: 56px 0; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .figure-card img { height: 260px; }
}