: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;
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  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;
  -webkit-font-smoothing:antialiased;
}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
a{color:var(--ink);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}

h1,h2,h3{color:var(--ink);font-weight:400;letter-spacing:-0.72px;line-height:1.2}
h1{font-size:72px;letter-spacing:-2.16px;line-height:1.1}
h2{font-size:36px}
h3{font-size:26px;letter-spacing:-0.325px;line-height:1.25}
p{margin-bottom:16px}
.section{padding:80px 0}
.section-tight{padding:48px 0}

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

.top-nav{
  background:var(--canvas);border-bottom:1px solid var(--hairline);
  position:sticky;top:0;z-index:50;
}
.top-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:-0.3px}
.wordmark span{color:var(--primary)}
.nav-links{display:flex;align-items:center;gap:24px;list-style:none}
.nav-links a{font-size:14px;font-weight:500;color:var(--ink)}
.nav-toggle{display:none;background:none;border:1px solid var(--hairline-strong);border-radius:8px;padding:8px 10px;cursor:pointer;font-size:14px}

.btn{
  display:inline-block;font-size:14px;font-weight:500;border-radius:8px;
  padding:10px 18px;cursor:pointer;border:1px solid transparent;text-align:center;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--primary);color:var(--on-primary)}
.btn-primary:active{background:var(--primary-active)}
.btn-secondary{background:var(--surface-card);color:var(--ink);border-color:var(--hairline-strong)}
.btn-ink{background:var(--ink);color:var(--canvas);padding:12px 20px}

.hero{background:var(--canvas);padding:96px 0 64px}
.hero p.lead{font-size:18px;color:var(--body);max-width:640px;margin:20px 0 0}
.hero .meta{margin-top:24px;font-size:13px;color:var(--muted)}
.hero-figure{margin-top:48px;border:1px solid var(--hairline);border-radius:12px;overflow:hidden;background:var(--surface-card)}
.hero-figure img{width:100%;height:auto;object-fit:cover;max-height:440px}
figure figcaption{font-size:13px;color:var(--muted);padding:12px 16px;background:var(--surface-card)}

.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:12px;padding:24px;
}
.card h3{font-size:18px;font-weight:600;letter-spacing:0;margin-bottom:8px}
.card.article{padding:0;overflow:hidden;display:flex;flex-direction:column}
.card.article img{width:100%;height:200px;object-fit:cover}
.card.article .body{padding:24px;display:flex;flex-direction:column;gap:8px;flex:1}
.card.article .body h3{margin-bottom:0}
.card.article .read{margin-top:auto;font-size:14px;font-weight:500;color:var(--ink)}

.badge{
  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:9999px;padding:4px 10px;
}

.pills{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 0}
.pill{font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;border-radius:9999px;padding:4px 10px;color:var(--ink)}
.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)}

.band{background:var(--canvas-soft);border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline)}

.prose{max-width:760px}
.prose h2{margin:48px 0 16px}
.prose h3{margin:32px 0 12px}
.prose ul,.prose ol{margin:0 0 16px 22px}
.prose li{margin-bottom:8px}
.prose figure{margin:32px 0;border:1px solid var(--hairline);border-radius:12px;overflow:hidden;background:var(--surface-card)}
.prose figure img{width:100%;max-height:420px;object-fit:cover}
.prose .note{
  background:var(--surface-card);border:1px solid var(--hairline);
  border-left:3px solid var(--primary);border-radius:8px;padding:20px;margin:24px 0;
}
.prose table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.prose th,.prose td{border:1px solid var(--hairline);padding:12px 14px;text-align:left}
.prose th{background:var(--surface-strong);color:var(--ink);font-weight:600}
.prose blockquote{border-left:3px solid var(--hairline-strong);padding-left:20px;color:var(--muted);margin:24px 0}

.article-head{border-bottom:1px solid var(--hairline);padding-bottom:32px;margin-bottom:32px}
.article-head .updated{font-size:13px;color:var(--muted);margin-top:16px}

.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:24px}
.breadcrumb a{color:var(--muted)}

.interlinks{border-top:1px solid var(--hairline);margin-top:48px;padding-top:32px}
.interlinks ul{list-style:none;display:grid;gap:12px}

.refs{font-size:14px}
.refs ul{margin-left:20px}

form{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);color:var(--ink);
  border:1px solid var(--hairline-strong);border-radius:8px;
  padding:12px 16px;height:44px;font-size:16px;font-family:inherit;
}
.field input:focus{outline:none;border-color:var(--primary)}
.field input:invalid:not(:placeholder-shown){border-color:var(--error)}
.form-status{display:none;margin-top:8px;font-size:14px}
.form-status.show{display:block}
.form-status.loading{color:var(--muted)}
.form-status.success{color:var(--success)}

.footer{background:var(--canvas);border-top:1px solid var(--hairline);padding:48px 0 32px}
.footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:24px}
.footer h4{font-size:13px;font-weight:600;color:var(--ink);margin-bottom:12px;text-transform:uppercase;letter-spacing:0.88px}
.footer ul{list-style:none;display:grid;gap:8px}
.footer a{font-size:14px;color:var(--body)}
.footer .brand p{font-size:14px;color:var(--body);max-width:280px}
.footer .legal{border-top:1px solid var(--hairline);margin-top:32px;padding-top:24px;font-size:13px;color:var(--muted);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.disclaimer{font-size:13px;color:var(--muted);max-width:760px;margin-top:16px}

.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:12px;padding:20px 24px;max-width:560px;margin:0 auto;
  display:none;
}
.cookie-banner.show{display:block}
.cookie-banner p{font-size:14px;color:var(--body)}
.cookie-banner .actions{display:flex;gap:12px;margin-top:16px}

@media(max-width:1024px){
  h1{font-size:56px;letter-spacing:-1.4px}
  .footer .cols{grid-template-columns:1fr 1fr 1fr}
}
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--canvas);
    flex-direction:column;align-items:flex-start;gap:0;padding:8px 24px 16px;border-bottom:1px solid var(--hairline)}
  .nav-links.open{display:flex}
  .nav-links li{width:100%;padding:8px 0}
  .nav-toggle{display:inline-block}
  .grid-3,.grid-2{grid-template-columns:1fr}
}
@media(max-width:640px){
  h1{font-size:32px;letter-spacing:-0.8px}
  h2{font-size:28px}
  .hero{padding:56px 0 40px}
  .section{padding:48px 0}
  .footer .cols{grid-template-columns:1fr 1fr}
}