/* RTCanary — design system v1 (19.10.2026)
   language: light display weight + mono-caps label layer + hairline grid cells, warm off-white / near-black, one accent (canary), theme toggle */
:root{
  --bg:#f7f6f2; --bg-2:#efede7; --ink:#131311; --ink-2:#4a4944; --ink-3:#8a8880; --line:#dcd9d0; --line-2:#cfccc2;
  --accent:#e9b400; --accent-ink:#7a5c00; --accent-soft:#fff3bf; --ok:#2f7d4f; --warn:#b45309; --bad:#b3261e;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace; --sans:"Geist",system-ui,-apple-system,"Segoe UI",sans-serif;
  --max:1180px; --gutter:clamp(16px,4vw,40px);
}
:root[data-theme="dark"]{
  --bg:#0f0f0e; --bg-2:#161614; --ink:#ecebe6; --ink-2:#b3b1aa; --ink-3:#77756e; --line:#262522; --line-2:#333230;
  --accent:#f2c43d; --accent-ink:#f2c43d; --accent-soft:#2b2410; --ok:#6fcf97; --warn:#f0a35e; --bad:#ef6f66;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0f0f0e; --bg-2:#161614; --ink:#ecebe6; --ink-2:#b3b1aa; --ink-3:#77756e; --line:#262522; --line-2:#333230;
  --accent:#f2c43d; --accent-ink:#f2c43d; --accent-soft:#2b2410; --ok:#6fcf97; --warn:#f0a35e; --bad:#ef6f66;}}
*{box-sizing:border-box} html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-weight:400;font-size:16px;line-height:1.55;letter-spacing:-0.005em}
a{color:inherit;text-decoration:none} a:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--accent)}
img{max-width:100%;height:auto}
h1,h2,h3{font-weight:400;letter-spacing:-0.03em;line-height:1.1;margin:0}
h1{font-size:clamp(34px,5.2vw,64px);font-weight:300} h2{font-size:clamp(24px,3vw,36px)} h3{font-size:20px;letter-spacing:-0.02em}
p{margin:0 0 1em} code,pre,kbd{font-family:var(--mono);font-size:0.9em}
pre{background:var(--bg-2);border:1px solid var(--line);padding:16px;overflow:auto;line-height:1.5;border-radius:0}
:not(pre)>code{background:var(--bg-2);padding:1px 5px;border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;font-size:15px} th,td{border-top:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{font-family:var(--mono);font-weight:500;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
tbody tr:last-child td{border-bottom:1px solid var(--line)}
hr{border:0;border-top:1px solid var(--line);margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.label{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);font-weight:500}
.label.accent{color:var(--accent-ink)}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.muted{color:var(--ink-2)}
/* header */
.hdr{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;gap:28px;height:56px}
.brand{display:flex;align-items:center;gap:10px;font-weight:500;letter-spacing:-0.02em}
.brand i{display:inline-block;width:12px;height:12px;background:var(--accent);transform:rotate(45deg);border-radius:1px}
.nav{display:flex;gap:22px;margin-left:auto;font-size:14px;color:var(--ink-2)} .nav a[aria-current]{color:var(--ink)}
.nav a:hover{text-decoration:none;color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:10px 16px;border:1px solid var(--ink);color:var(--ink);background:transparent;cursor:pointer;line-height:1;white-space:nowrap}
.btn:hover{background:var(--ink);color:var(--bg);text-decoration:none}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#131311} .btn.primary:hover{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.btn.sm{padding:7px 11px;font-size:11px}
#theme{border:1px solid var(--line-2);width:34px;height:34px;display:inline-grid;place-items:center;background:transparent;color:var(--ink);cursor:pointer;padding:0}
#theme svg{width:15px;height:15px}
.menu-btn{display:none}
/* hero */
.hero{border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:40px;padding-top:72px;padding-bottom:72px;align-items:center}
.hero p.lede{font-size:19px;color:var(--ink-2);max-width:48ch;margin:22px 0 28px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.hero .fine{margin-top:14px}
/* trace (blueprint frame) */
.trace{border:1px solid var(--line-2);background:
  linear-gradient(var(--line) 1px,transparent 1px) 0 0/100% 24px,
  linear-gradient(90deg,var(--line) 1px,transparent 1px) 0 0/24px 100%, var(--bg-2);
  padding:18px 18px 14px;font-family:var(--mono);font-size:12px;position:relative}
.trace .thead{display:flex;justify-content:space-between;color:var(--ink-3);letter-spacing:.08em;text-transform:uppercase;font-size:11px;margin-bottom:12px}
.trace .row{display:grid;grid-template-columns:86px 1fr 64px;gap:12px;align-items:center;padding:7px 0;border-top:1px solid var(--line)}
.trace .row:first-of-type{border-top:0}
.trace .bar{height:6px;background:var(--line-2);position:relative;overflow:hidden}
.trace .bar>i{position:absolute;left:0;top:0;bottom:0;background:var(--ink);width:var(--w,40%);animation:grow 1.2s cubic-bezier(.2,.7,.2,1) both;animation-delay:var(--d,0s)}
.trace .row.ok .bar>i{background:var(--ok)} .trace .row.warn .bar>i{background:var(--warn)} .trace .row.bad .bar>i{background:var(--bad)}
.trace .v{text-align:right;color:var(--ink-2);font-variant-numeric:tabular-nums}
.trace .status{margin-top:12px;display:flex;justify-content:space-between;align-items:center;color:var(--ink-3);font-size:11px;letter-spacing:.06em;text-transform:uppercase}
.dot{display:inline-block;width:7px;height:7px;background:var(--ok);border-radius:50%;margin-right:7px;box-shadow:0 0 0 3px color-mix(in srgb,var(--ok) 22%,transparent)}
@keyframes grow{from{width:0}}
@media (prefers-reduced-motion:reduce){.trace .bar>i{animation:none}}
/* grid cells */
.cells{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-width:1px 0 0 1px}
.cells>*{border:1px solid var(--line);border-width:0 1px 1px 0;padding:26px 24px;min-width:0}
.cells.two{grid-template-columns:repeat(2,1fr)} .cells.four{grid-template-columns:repeat(4,1fr)}
.cell h3{margin:10px 0 10px} .cell p{color:var(--ink-2);font-size:15px;margin:0}
.cell .big{font-size:clamp(28px,3vw,40px);font-weight:300;letter-spacing:-0.03em;line-height:1;margin:6px 0 8px}
section{padding:64px 0} section.tight{padding:40px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.sec-head p{max-width:60ch;color:var(--ink-2);margin:0}
/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.steps>div{padding:22px 20px 26px 0;border-right:1px solid var(--line);padding-right:20px}
.steps>div:last-child{border-right:0}
.steps .label{margin-bottom:12px}
/* prose (docs/articles/legal) */
.prose{max-width:72ch} .prose p,.prose li{font-size:17px;line-height:1.65} .prose h2{margin:44px 0 14px;padding-top:28px;border-top:1px solid var(--line);font-size:26px}
.prose h3{margin:28px 0 10px;font-size:19px} .prose ul,.prose ol{padding-left:22px;margin:0 0 1.2em} .prose li{margin:0 0 .4em}
.prose p.lede{font-size:20px;color:var(--ink);line-height:1.5}
.prose table{font-size:14px;margin:14px 0 26px;display:block;overflow-x:auto}
.prose blockquote{margin:0 0 1.2em;padding:4px 0 4px 18px;border-left:2px solid var(--accent);color:var(--ink-2)}
.prose pre{margin:0 0 1.4em} .prose a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line-2)} .prose a:hover{text-decoration-color:var(--accent)}
.prose figure{margin:0 0 1.4em} .prose figcaption{font-size:13px;color:var(--ink-3)}
.article-head{padding:56px 0 36px;border-bottom:1px solid var(--line)}
.article-head h1{max-width:22ch;font-size:clamp(30px,4.2vw,50px)} .article-head .meta{display:flex;gap:18px;flex-wrap:wrap;margin-top:18px}
.article-body{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:56px;padding:40px 0 72px;min-width:0}
.prose{min-width:0;max-width:72ch} .prose pre,.prose table{max-width:100%}
.toc{position:sticky;top:80px;align-self:start;font-size:13px}
.toc .label{margin-bottom:12px} .toc a{display:block;padding:5px 0 5px 12px;border-left:1px solid var(--line);color:var(--ink-2)}
.toc a:hover{text-decoration:none;color:var(--ink)} .toc a.on{border-left-color:var(--accent);color:var(--ink)}
.related{border-top:1px solid var(--line);padding:40px 0 64px}
.related .cells>*{padding:20px} .related h3{font-size:17px;margin:8px 0 6px}
/* blog list */
.post-list>a{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:22px 0;border-top:1px solid var(--line)}
.post-list>a:last-child{border-bottom:1px solid var(--line)} .post-list>a:hover{text-decoration:none;background:var(--bg-2)}
.post-list h3{margin:0 0 6px;font-size:21px} .post-list p{margin:0;color:var(--ink-2);font-size:15px}
/* pricing */
.plans{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-width:1px 0 0 1px}
.plans>div{border:1px solid var(--line);border-width:0 1px 1px 0;padding:28px 26px;display:flex;flex-direction:column;gap:12px}
.plans .price{font-size:40px;font-weight:300;letter-spacing:-0.03em;line-height:1} .plans .price small{font-size:14px;color:var(--ink-3);letter-spacing:0}
.plans ul{list-style:none;padding:0;margin:8px 0 0;font-size:15px;color:var(--ink-2)} .plans li{padding:7px 0;border-top:1px solid var(--line)}
.plans .btn{margin-top:auto;align-self:flex-start}
.note{border:1px solid var(--line-2);border-left:3px solid var(--accent);padding:14px 16px;font-size:14px;color:var(--ink-2);background:var(--bg-2)}
/* tool */
.tool{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);border:1px solid var(--line)}
.tool>div{padding:26px} .tool>div:first-child{border-right:1px solid var(--line)}
.field{display:grid;grid-template-columns:1fr 150px;gap:12px;align-items:center;padding:10px 0;border-top:1px solid var(--line)}
.field:first-of-type{border-top:0} .field label{font-size:14px} .field label small{display:block;color:var(--ink-3);font-size:12px}
.field input,.field select{font:inherit;font-family:var(--mono);font-size:13px;padding:7px 9px;border:1px solid var(--line-2);background:var(--bg);color:var(--ink);width:100%}
.field input[type=range]{padding:0;border:0;width:100%}
.result .big{font-size:64px;font-weight:300;letter-spacing:-0.04em;line-height:1} .result .kv{display:grid;grid-template-columns:1fr auto;gap:6px 16px;font-size:14px;margin-top:18px}
.result .kv span:nth-child(odd){color:var(--ink-2)} .result .kv span:nth-child(even){font-family:var(--mono);text-align:right}
.meter{height:6px;background:var(--line);margin:14px 0 6px;position:relative} .meter i{position:absolute;left:0;top:0;bottom:0;background:var(--accent)}
.scale{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:.06em}
/* footer */
footer{border-top:1px solid var(--line);padding:40px 0 48px;font-size:14px;color:var(--ink-2)}
footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
footer a{display:block;padding:3px 0} footer .label{margin-bottom:10px}
footer .fine{grid-column:1/-1;border-top:1px solid var(--line);padding-top:18px;font-size:12px;color:var(--ink-3);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
/* get started */
.ea{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:start}
.ea .box{border:1px solid var(--line-2);padding:28px}
.ea .box .btn{width:100%;justify-content:center;margin-top:16px}
/* responsive */
@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr;padding-top:48px;padding-bottom:48px}
  .cells,.cells.four{grid-template-columns:repeat(2,1fr)} .steps{grid-template-columns:1fr 1fr} .steps>div:nth-child(2n){border-right:0}
  .plans{grid-template-columns:1fr} .article-body{grid-template-columns:minmax(0,1fr)} .toc{display:none}
  footer .wrap{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .nav{display:none} .nav.open{display:flex;position:absolute;left:0;right:0;top:56px;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;padding:12px var(--gutter) 16px;gap:12px}
  .menu-btn{display:inline-grid;margin-left:auto} .hdr .cta-hdr{display:none}
  .cells,.cells.two,.cells.four{grid-template-columns:1fr} .steps{grid-template-columns:1fr} .steps>div{border-right:0;border-bottom:1px solid var(--line)}
  .tool{grid-template-columns:1fr} .tool>div:first-child{border-right:0;border-bottom:1px solid var(--line)}
  .post-list>a{grid-template-columns:1fr;gap:6px} .ea{grid-template-columns:1fr} footer .wrap{grid-template-columns:1fr}
  .field{grid-template-columns:1fr} .result .big{font-size:52px} section{padding:44px 0}
  .trace .row{grid-template-columns:70px 1fr 56px}
}