: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;
  --t-thinking:#dfa88f;
  --t-grep:#9fc9a2;
  --t-read:#9fbbe0;
  --t-edit:#c0a8dd;
  --t-done:#c08532;
  --success:#1f8a65;
  --error:#cf2d56;
  --r-xs:4px;
  --r-sm:6px;
  --r-md:8px;
  --r-lg:12px;
  --r-xl:16px;
  --r-pill:9999px;
  --maxw: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:-0.15px;
}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--ink);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{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;}
h4{font-size:22px;line-height:1.3;letter-spacing:-0.11px;}
p{margin:0 0 16px;}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--canvas);padding:8px 16px;border-radius:var(--r-md);z-index:200;}
.skip-link:focus{left:16px;top:16px;}

.top-nav{background:var(--canvas);border-bottom:1px solid var(--hairline);position:sticky;top:0;z-index:100;}
.nav-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{display:flex;align-items:baseline;gap:8px;}
.brand-mark{color:var(--primary);font-weight:600;font-size:18px;letter-spacing:-0.4px;}
.brand-sub{color:var(--muted);font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;}
.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-link-cta{background:var(--primary);color:var(--on-primary);padding:10px 18px;border-radius:var(--r-md);font-size:14px;}
.nav-link-cta:hover{background:var(--primary-active);color:var(--on-primary);text-decoration:none;}
.nav-toggle{display:none;}
.nav-burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;}
.nav-burger span{width:22px;height:2px;background:var(--ink);display:block;}

.section{padding:80px 0;}
.section-sm{padding:48px 0;}
.label-uppercase{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:680px;}

.hero{background:var(--canvas);padding:80px 0 48px;}
.hero h1{margin-bottom:20px;}
.hero .lead{margin-bottom:24px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px;}
.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;}
.hero-figure{margin-top:32px;}
.hero-figure img{border-radius:var(--r-lg);border:1px solid var(--hairline);width:100%;object-fit:cover;max-height:420px;}
figure{margin:0;}
figcaption{font-size:13px;color:var(--muted);margin-top:8px;}

.btn{display:inline-block;font-weight:500;font-size:14px;line-height:1;border-radius:var(--r-md);padding:13px 20px;border:1px solid transparent;cursor:pointer;}
.btn-primary{background:var(--primary);color:var(--on-primary);}
.btn-primary:hover{background:var(--primary-active);color:var(--on-primary);text-decoration:none;}
.btn-secondary{background:var(--surface-card);color:var(--ink);border:1px solid var(--hairline-strong);}
.btn-secondary:hover{text-decoration:none;border-color:var(--ink);}
.btn-ink{background:var(--ink);color:var(--canvas);padding:14px 22px;}
.btn-ink:hover{color:var(--canvas);text-decoration:none;}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;}

.grid{display:grid;gap:24px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
.card{background:var(--surface-card);border:1px solid var(--hairline);border-radius:var(--r-lg);padding:24px;}
.card h3{font-size:22px;}
.card-title{font-size:18px;font-weight:600;letter-spacing:0;margin-bottom:8px;color:var(--ink);}
.card .meta{font-size:13px;color:var(--muted);}
.card-img{border-radius:var(--r-md);border:1px solid var(--hairline);margin-bottom:16px;width:100%;height:200px;object-fit:cover;}

.divider{height:1px;background:var(--hairline);border:0;margin:0;}
.section-head{max-width:760px;margin-bottom:40px;}

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

.callout{background:var(--canvas-soft);border:1px solid var(--hairline);border-radius:var(--r-lg);padding:20px;font-family:"JetBrains Mono",ui-monospace,monospace;font-size:13px;color:var(--ink);}
.code-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;color:var(--ink);overflow-x:auto;}

.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:12px 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:0;}

.article-body{max-width:760px;}
.article-body h2{margin-top:40px;}
.article-body h3{margin-top:28px;font-size:22px;}
.article-body ul,.article-body ol{padding-left:20px;color:var(--body);}
.article-body li{margin-bottom:8px;}
.article-meta{font-size:13px;color:var(--muted);margin-bottom:24px;}
.article-figure{margin:32px 0;}
.article-figure img{border-radius:var(--r-lg);border:1px solid var(--hairline);width:100%;}

.crumbs{font-size:13px;color:var(--muted);margin-bottom:16px;}
.crumbs a{color:var(--muted);}

.related{margin-top:48px;}
.tag{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-xs);padding:4px 10px;margin:0 6px 6px 0;}

.form-wrap{background:var(--surface-card);border:1px solid var(--hairline);border-radius:var(--r-lg);padding:32px;max-width:640px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:6px;}
.field input,.field textarea{width:100%;background:var(--surface-card);color:var(--ink);border:1px solid var(--hairline-strong);border-radius:var(--r-md);padding:12px 16px;font-family:inherit;font-size:16px;}
.field input:focus,.field textarea:focus{outline:2px solid var(--primary);border-color:var(--primary);}
.field textarea{min-height:120px;resize:vertical;}
.form-msg{display:none;border-radius:var(--r-md);padding:12px 16px;font-size:14px;margin-bottom:16px;}
.form-msg.success{display:block;background:rgba(31,138,101,0.1);color:var(--success);border:1px solid var(--success);}
.field-error{color:var(--error);font-size:13px;margin-top:4px;display:none;}
.field.invalid .field-error{display:block;}
.field.invalid input,.field.invalid textarea{border-color:var(--error);}

.footer{background:var(--canvas);border-top:1px solid var(--hairline);padding:64px 0 48px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:24px;}
.footer-head{font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;color:var(--muted);margin-bottom:12px;}
.footer-link{display:block;font-size:14px;color:var(--body);margin-bottom:8px;}
.footer-link:hover{color:var(--ink);}
.footer-note{font-size:14px;color:var(--body);max-width:320px;}
.footer-updated{font-size:13px;color:var(--muted);}
.footer-bottom{margin-top:40px;padding-top:24px;border-top:1px solid var(--hairline);}
.footer-disclaimer{font-size:13px;color:var(--muted);max-width:820px;}
.footer-copy{font-size:13px;color:var(--muted);}

.cookie-banner{position:fixed;left:24px;right:24px;bottom:24px;max-width:560px;margin:0 auto;background:var(--surface-card);border:1px solid var(--hairline-strong);border-radius:var(--r-lg);padding:20px;z-index:150;display:none;}
.cookie-banner.show{display:block;}
.cookie-text{font-size:14px;color:var(--body);margin-bottom:16px;}
.cookie-text a{color:var(--ink);text-decoration:underline;}
.cookie-actions{display:flex;gap:12px;}

@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr 1fr;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  h1{font-size:56px;letter-spacing:-1.6px;}
}
@media (max-width:768px){
  .nav-burger{display:flex;}
  .nav-menu{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;display:none;}
  .nav-menu .nav-link{padding:12px 0;width:100%;}
  .nav-toggle:checked ~ .nav-menu{display:flex;}
  .grid-3,.grid-2{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  h1{font-size:32px;letter-spacing:-0.8px;}
  h2{font-size:28px;}
  .section{padding:48px 0;}
}
@media (max-width:480px){
  .footer-grid{grid-template-columns:1fr;}
  .cookie-actions{flex-direction:column;}
}