:root{
  --primary:#f54e00;
  --primary-active:#d04200;
  --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;
  --on-primary:#ffffff;
  --success:#1f8a65;
  --error:#cf2d56;
  --t-thinking:#dfa88f;
  --t-grep:#9fc9a2;
  --t-read:#9fbbe0;
  --t-edit:#c0a8dd;
  --t-done:#c08532;
  --font-sans:"Inter",system-ui,"Helvetica Neue",Helvetica,Arial,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --maxw:1200px;
  --r-xs:4px;
  --r-sm:6px;
  --r-md:8px;
  --r-lg:12px;
  --r-xl:16px;
  --r-pill:9999px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--canvas);
  color:var(--body);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.5;
  letter-spacing:-0.15px;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;}
a:hover{color:var(--primary);}

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

h1,h2,h3,h4{color:var(--ink);font-weight:400;margin:0 0 16px;}
h1{font-size:48px;line-height:1.1;letter-spacing:-1.4px;}
h2{font-size:36px;line-height:1.2;letter-spacing:-0.72px;}
h3{font-size:26px;line-height:1.25;letter-spacing:-0.325px;}
h4{font-size:22px;line-height:1.3;letter-spacing:-0.11px;}
p{margin:0 0 16px;}

.eyebrow{
  font-size:11px;
  font-weight:600;
  line-height:1.4;
  letter-spacing:0.88px;
  text-transform:uppercase;
  color:var(--muted);
  margin:0 0 16px;
}

.site-header{
  background:var(--canvas);
  border-bottom:1px solid var(--hairline);
  position:sticky;
  top:0;
  z-index:50;
}
.nav{
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.wordmark{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:18px;
  font-weight:600;
  color:var(--ink);
  letter-spacing:-0.3px;
}
.wordmark .dot{
  width:18px;height:18px;border-radius:var(--r-sm);
  background:var(--primary);display:inline-block;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:24px;
  list-style:none;
  margin:0;padding:0;
}
.nav-links a{
  font-size:14px;
  font-weight:500;
  color:var(--body);
}
.nav-links a.active,.nav-links a:hover{color:var(--ink);}
.nav-toggle{
  display:none;
  background:var(--surface-card);
  border:1px solid var(--hairline-strong);
  border-radius:var(--r-md);
  width:40px;height:40px;
  cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";display:block;width:18px;height:2px;background:var(--ink);position:relative;
}
.nav-toggle span::before{position:absolute;top:-6px;}
.nav-toggle span::after{position:absolute;top:6px;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  font-weight:500;
  border-radius:var(--r-md);
  padding:10px 18px;
  height:40px;
  cursor:pointer;
  border:1px solid transparent;
  transition:background .15s ease,color .15s ease;
}
.btn-primary{background:var(--primary);color:var(--on-primary);}
.btn-primary:hover{background:var(--primary-active);color:var(--on-primary);}
.btn-secondary{background:var(--surface-card);color:var(--ink);border-color:var(--hairline-strong);}
.btn-secondary:hover{color:var(--ink);border-color:var(--ink);}
.btn-ink{background:var(--ink);color:var(--canvas);height:44px;padding:12px 20px;}
.btn-ink:hover{color:var(--canvas);background:#000;}

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

.hero{padding:80px 0 56px;}
.hero h1{max-width:14ch;}
.hero .lead{font-size:18px;color:var(--body);max-width:60ch;margin-bottom:24px;}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:40px;}
.hero-figure{
  background:var(--surface-card);
  border:1px solid var(--hairline);
  border-radius:var(--r-lg);
  overflow:hidden;
}
.hero-figure img{width:100%;height:420px;object-fit:cover;}
figure{margin:0;}
figcaption{font-size:13px;line-height:1.4;color:var(--muted);padding:12px 16px;}

.timeline-row{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0 0;}
.pill{
  display:inline-flex;align-items:center;
  font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;
  color:var(--ink);border-radius:var(--r-pill);padding:4px 10px;
}
.pill.thinking{background:var(--t-thinking);}
.pill.grep{background:var(--t-grep);}
.pill.read{background:var(--t-read);}
.pill.edit{background:var(--t-edit);}
.pill.done{background:var(--t-done);color:var(--on-primary);}

.badge{
  display:inline-flex;align-items:center;
  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;
}

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

.card{
  background:var(--surface-card);
  border:1px solid var(--hairline);
  border-radius:var(--r-lg);
  padding:24px;
}
.card h3{font-size:18px;font-weight:600;letter-spacing:0;margin-bottom:8px;}
.card p:last-child{margin-bottom:0;}

.article-card{display:flex;flex-direction:column;overflow:hidden;padding:0;}
.article-card .thumb{height:200px;overflow:hidden;border-bottom:1px solid var(--hairline);}
.article-card .thumb img{width:100%;height:100%;object-fit:cover;}
.article-card .body{padding:24px;display:flex;flex-direction:column;gap:8px;flex:1;}
.article-card .body h3{font-size:18px;font-weight:600;letter-spacing:0;margin:0;}
.article-card .meta{font-size:13px;color:var(--muted);}
.article-card .read{margin-top:auto;font-size:14px;font-weight:500;color:var(--ink);}
.article-card .read:hover{color:var(--primary);}

.section-head{margin-bottom:40px;max-width:62ch;}
.section-head p{color:var(--body);margin:0;}

.split{display:grid;grid-template-columns:1.1fr 0.9fr;gap:48px;align-items:center;}
.split img{border-radius:var(--r-lg);border:1px solid var(--hairline);width:100%;height:360px;object-fit:cover;}

.callout{
  background:var(--canvas-soft);
  border:1px solid var(--hairline);
  border-left:3px solid var(--primary);
  border-radius:var(--r-md);
  padding:20px 24px;
}
.callout p:last-child{margin-bottom:0;}

.code-block{
  background:var(--surface-card);
  border:1px solid var(--hairline);
  border-radius:var(--r-lg);
  padding:20px;
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.6;
  color:var(--ink);
  overflow-x:auto;
  white-space:pre;
}

.spec-table{width:100%;border-collapse:collapse;background:var(--surface-card);border:1px solid var(--hairline);border-radius:var(--r-lg);overflow:hidden;}
.spec-table th,.spec-table td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--hairline);font-size:14px;}
.spec-table th{background:var(--canvas-soft);color:var(--ink);font-weight:600;}
.spec-table tr:last-child td{border-bottom:none;}
.spec-table td{color:var(--body);}

.checklist{list-style:none;margin:0;padding:0;}
.checklist li{position:relative;padding:8px 0 8px 28px;border-bottom:1px solid var(--hairline-soft);color:var(--body);font-size:15px;}
.checklist li:last-child{border-bottom:none;}
.checklist li::before{content:"";position:absolute;left:0;top:13px;width:14px;height:14px;border-radius:var(--r-xs);background:var(--t-grep);}

.article-body{max-width:760px;margin:0 auto;}
.article-hero{margin:0 0 40px;}
.article-hero img{width:100%;height:380px;object-fit:cover;border-radius:var(--r-lg);border:1px solid var(--hairline);}
.article-body h2{margin-top:40px;}
.article-body h3{margin-top:28px;}
.article-body ul,.article-body ol{color:var(--body);padding-left:22px;margin:0 0 16px;}
.article-body li{margin-bottom:8px;}
.article-meta{font-size:13px;color:var(--muted);margin-bottom:16px;}
.article-tags{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0 0;}

.references{border-top:1px solid var(--hairline);margin-top:48px;padding-top:24px;}
.references h3{font-size:18px;font-weight:600;letter-spacing:0;}
.references ul{padding-left:20px;}
.references a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--hairline-strong);}
.references a:hover{color:var(--primary);}

.related{border-top:1px solid var(--hairline);margin-top:48px;padding-top:32px;}

.form{
  background:var(--surface-card);
  border:1px solid var(--hairline);
  border-radius:var(--r-lg);
  padding:32px;
  max-width:560px;
}
.field{margin-bottom:20px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.field input{
  width:100%;
  background:var(--surface-card);
  border:1px solid var(--hairline-strong);
  border-radius:var(--r-md);
  padding:12px 16px;
  height:44px;
  font-family:var(--font-sans);
  font-size:15px;
  color:var(--ink);
}
.field input:focus{outline:none;border-color:var(--ink);}
.field input.invalid{border-color:var(--error);}
.field .error-text{display:none;color:var(--error);font-size:13px;margin-top:6px;}
.field input.invalid + .error-text{display:block;}
.form-note{font-size:13px;color:var(--muted);margin-top:8px;}
.form-status{
  display:none;
  margin-top:20px;
  padding:14px 16px;
  border-radius:var(--r-md);
  background:rgba(31,138,101,0.10);
  border:1px solid var(--success);
  color:var(--success);
  font-size:14px;
}
.form-status.show{display:block;}
.btn[disabled]{opacity:0.6;cursor:not-allowed;}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;}
.contact-info dl{margin:0;}
.contact-info dt{font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;color:var(--muted);margin-top:20px;}
.contact-info dd{margin:4px 0 0;color:var(--ink);font-size:15px;}

.site-footer{background:var(--canvas);border-top:1px solid var(--hairline);padding:64px 0 48px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;}
.footer-grid h4{font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;color:var(--muted);margin-bottom:12px;}
.footer-grid ul{list-style:none;margin:0;padding:0;}
.footer-grid li{margin-bottom:8px;}
.footer-grid a{font-size:14px;color:var(--body);}
.footer-grid a:hover{color:var(--ink);}
.footer-brand p{font-size:14px;color:var(--body);max-width:34ch;}
.footer-bottom{border-top:1px solid var(--hairline);margin-top:40px;padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--ink);}
.disclaimer{font-size:13px;color:var(--muted);max-width:80ch;margin-top:16px;}

.cookie-banner{
  position:fixed;
  left:24px;right:24px;bottom:24px;
  max-width:var(--maxw);
  margin:0 auto;
  background:var(--surface-card);
  border:1px solid var(--hairline-strong);
  border-radius:var(--r-lg);
  padding:20px 24px;
  display:none;
  z-index:60;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}
.cookie-banner.show{display:flex;}
.cookie-banner p{margin:0;font-size:14px;color:var(--body);max-width:60ch;}
.cookie-actions{display:flex;gap:12px;}

@media (max-width:1024px){
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  h1{font-size:40px;}
}
@media (max-width:768px){
  .nav-links{
    display:none;
    position:absolute;
    top:64px;left:0;right:0;
    background:var(--canvas);
    border-bottom:1px solid var(--hairline);
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:8px 24px 16px;
  }
  .nav-links.open{display:flex;}
  .nav-links li{width:100%;padding:8px 0;}
  .nav-toggle{display:inline-flex;}
  .grid-2,.grid-3,.split,.contact-grid{grid-template-columns:1fr;}
  .split{gap:24px;}
  h1{font-size:32px;letter-spacing:-1px;}
  h2{font-size:28px;}
  .hero-figure img{height:260px;}
  .section{padding:56px 0;}
}