/* Layout: one reading column (~68ch) with full-width interactive figures; monochrome ink with a highlighter tone for "the thing to remember" */
:root{
  --bg:#FAFAF9; --surface:#FFFFFF; --ink:#0B0B0C; --body:#3E3F44; --muted:#64666D; --rule:#E2E2E0;
  --mark:#F3E58A; --mark-ink:#0B0B0C; --soft:#F1F1EF; --dark:#0B0B0C; --on-dark:#F4F4F2;
  --display:'Schibsted Grotesk','Helvetica Neue',Arial,sans-serif;
  --serif:'Newsreader',Georgia,serif;
  --mono:'JetBrains Mono',ui-monospace,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0E0E10; --surface:#17171A; --ink:#F2F2F0; --body:#C9C9CC; --muted:#9A9BA1; --rule:#2B2B30;
  --mark:#5E5422; --mark-ink:#FFF7C2; --soft:#1C1C20; --dark:#F2F2F0; --on-dark:#0E0E10; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0E0E10; --surface:#17171A; --ink:#F2F2F0; --body:#C9C9CC; --muted:#9A9BA1; --rule:#2B2B30;
  --mark:#5E5422; --mark-ink:#FFF7C2; --soft:#1C1C20; --dark:#F2F2F0; --on-dark:#0E0E10; color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--display);font-size:18px;line-height:1.65;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
a{color:var(--ink)}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:4px}
.col{max-width:720px;margin:0 auto}
.wide{max-width:1040px;margin:0 auto}
mark{background:var(--mark);color:var(--mark-ink);padding:0 .15em;border-radius:3px}
.mono{font-family:var(--mono);font-size:12.5px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}
h1,h2,h3{text-wrap:balance;margin:0;letter-spacing:-.03em}
h2{font-size:clamp(26px,3.2vw,34px);line-height:1.12;font-weight:700}
h3{font-size:20px;font-weight:700;letter-spacing:-.015em}
p{margin:0}
.prose{display:flex;flex-direction:column;gap:18px;color:var(--body)}
.prose strong{color:var(--ink)}

/* top bar */
.bar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding-block:18px;border-bottom:1px solid var(--rule)}
.brand{display:flex;gap:10px;align-items:center;font-weight:700;text-decoration:none;font-size:16px}
.dot{width:30px;height:30px;border-radius:50%;background:var(--dark);color:var(--on-dark);display:inline-flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:11px}
.viewas{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.seg{display:inline-flex;border:1px solid var(--rule);border-radius:999px;padding:3px;background:var(--surface)}
.seg button{border:0;background:none;padding:6px 12px;border-radius:999px;cursor:pointer;font-size:13px;font-weight:600;color:var(--muted);min-height:32px}
.seg button[aria-pressed="true"]{background:var(--dark);color:var(--on-dark)}

/* header */
header.hero{padding-block:56px 32px;display:flex;flex-direction:column;gap:20px}
.kicker{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center}
.pill{font-family:var(--mono);font-size:12px;letter-spacing:.05em;text-transform:uppercase;border:1.5px solid var(--ink);border-radius:999px;padding:4px 10px}
h1{font-size:clamp(40px,6.4vw,72px);line-height:.98;font-weight:800;letter-spacing:-.045em}
h1 em{font-family:var(--serif);font-weight:400;letter-spacing:-.02em}
.dek{font-size:21px;line-height:1.5;color:var(--body);max-width:36em}
.meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:10px 18px;border-radius:999px;border:1.5px solid var(--ink);background:var(--surface);cursor:pointer;font-weight:600;font-size:15px}
.btn.solid{background:var(--dark);color:var(--on-dark);border-color:var(--dark)}
.btn svg{width:18px;height:18px}
.author{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--muted);margin-right:8px}
.author b{color:var(--ink)}

/* tldr */
.tldr{background:var(--surface);border:1px solid var(--rule);border-radius:20px;padding:28px;display:grid;gap:14px}
.tldr ol{margin:0;padding-left:22px;display:grid;gap:8px;color:var(--body)}
.tldr li::marker{font-family:var(--mono);color:var(--muted)}

section{padding-block:56px 8px}
.sechead{display:flex;flex-direction:column;gap:10px;margin-bottom:22px}

/* pipeline */
.pipe{display:flex;flex-wrap:wrap;gap:8px;align-items:stretch}
.step{flex:1 1 130px;min-width:0;text-align:left;border:1.5px solid var(--rule);background:var(--surface);border-radius:16px;padding:14px 14px 16px;cursor:pointer;display:flex;flex-direction:column;gap:6px;transition:border-color .15s,transform .15s}
.step:hover{border-color:var(--ink)}
.step[aria-selected="true"]{border-color:var(--ink);background:var(--dark);color:var(--on-dark)}
.step .n{font-family:var(--mono);font-size:12px;opacity:.7}
.step .t{font-weight:700;font-size:17px;letter-spacing:-.01em}
.step .s{font-size:13px;opacity:.75;line-height:1.35}
.phase{display:flex;gap:8px;margin:12px 0 0;font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.05em;text-transform:uppercase}
.phase span{flex:3;border-top:1.5px dashed var(--muted);padding-top:6px}
.phase span+span{flex:3}
.detail{margin-top:18px;border:1px solid var(--rule);border-radius:20px;background:var(--surface);display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.detail > div{padding:24px 26px;display:flex;flex-direction:column;gap:8px;min-width:0}
.detail > div + div{border-left:1px solid var(--rule)}
@media (max-width:620px){.detail > div + div{border-left:0;border-top:1px solid var(--rule)}}
.detail p{color:var(--body);font-size:16.5px}
.prodtag{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;display:inline-flex;gap:6px;align-items:center}
.prodtag i{width:8px;height:8px;border-radius:50%;background:var(--mark);border:1.5px solid var(--ink);display:inline-block}

/* analogy */
.analogy{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.card{background:var(--surface);border:1px solid var(--rule);border-radius:18px;padding:22px;display:flex;flex-direction:column;gap:8px}
.card .big{font-family:var(--serif);font-style:italic;font-size:26px;line-height:1.2}
.card p{color:var(--body);font-size:16px}
.card.on{background:var(--dark);color:var(--on-dark);border-color:var(--dark)}
.card.on p{color:var(--on-dark);opacity:.82}

/* search compare */
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.tabs button{border:1.5px solid var(--rule);background:var(--surface);border-radius:999px;padding:8px 14px;cursor:pointer;font-size:14px;font-weight:600;min-height:40px}
.tabs button[aria-selected="true"]{border-color:var(--ink);background:var(--dark);color:var(--on-dark)}
.cmp{overflow-x:auto;border:1px solid var(--rule);border-radius:18px;background:var(--surface)}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:15.5px}
th,td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:500}
tr:last-child td{border-bottom:0}
td.win{font-weight:700}
.verdict{display:inline-block;font-family:var(--mono);font-size:12px;padding:3px 8px;border-radius:6px;border:1px solid var(--rule)}
.verdict.good{background:var(--mark);color:var(--mark-ink);border-color:transparent}

/* chunk figure */
.fig{background:var(--surface);border:1px solid var(--rule);border-radius:18px;padding:22px;overflow-x:auto}
.fig svg{display:block;min-width:560px;width:100%;height:auto}
.fig figcaption{margin-top:12px;font-size:14px;color:var(--muted)}
figure{margin:0}

/* accordions */
details{border-top:1px solid var(--rule)}
details:last-of-type{border-bottom:1px solid var(--rule)}
summary{list-style:none;cursor:pointer;padding:20px 0;display:flex;justify-content:space-between;gap:16px;align-items:flex-start;font-weight:700;font-size:19px;letter-spacing:-.01em;min-height:44px}
summary::-webkit-details-marker{display:none}
summary .plus{flex:0 0 28px;height:28px;border-radius:50%;border:1.5px solid var(--ink);display:inline-flex;align-items:center;justify-content:center;font-weight:500;transition:transform .2s}
details[open] summary .plus{transform:rotate(45deg)}
.ans{padding:0 0 22px;display:flex;flex-direction:column;gap:12px;color:var(--body);font-size:17px}
.ans ul{margin:0;padding-left:20px;display:grid;gap:6px}
.qtag{font-family:var(--mono);font-size:12px;color:var(--muted);font-weight:500;letter-spacing:.05em;text-transform:uppercase;display:block;margin-bottom:4px}

/* production box */
.prod{background:var(--dark);color:var(--on-dark);border-radius:24px;padding:32px;display:grid;gap:18px}
.prod .mono{color:var(--on-dark);opacity:.7}
.prod ol{margin:0;padding-left:22px;display:grid;gap:12px}
.prod li::marker{font-family:var(--mono)}
.prod p,.prod li{opacity:.9}

.mistakes{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.mistakes .card h3{font-size:18px}
.x{font-family:var(--mono);font-size:12px;color:var(--muted)}

/* gate */
.gate{margin-top:28px;position:relative}
.gate .fade{height:140px;margin-top:-140px;position:relative;background:linear-gradient(to bottom,transparent,var(--bg))}
.gatecard{background:var(--surface);border:1.5px solid var(--ink);border-radius:24px;padding:32px;display:grid;gap:16px;max-width:520px;margin:0 auto}
.gatecard h2{font-size:28px}
.gatecard p{color:var(--body);font-size:16px}
.field{display:grid;gap:6px}
.field label{font-size:14px;font-weight:600}
.field input{min-height:50px;border:1.5px solid var(--rule);border-radius:12px;padding:12px 14px;font:inherit;font-size:17px;background:var(--bg);color:var(--ink)}
.or{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:13px}
.or::before,.or::after{content:"";flex:1;border-top:1px solid var(--rule)}
.fine{font-size:12.5px;color:var(--muted);line-height:1.5}
.unlock-list{display:flex;flex-wrap:wrap;gap:8px}
.unlock-list span{font-size:13px;border:1px solid var(--rule);border-radius:999px;padding:4px 10px;color:var(--body)}
.sent{background:var(--soft);border-radius:12px;padding:12px 14px;font-size:15px}

footer{margin-top:72px;border-top:1px solid var(--rule);padding-block:28px 48px;display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;color:var(--muted);font-size:14px}
.next{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.next a{text-decoration:none;background:var(--surface);border:1px solid var(--rule);border-radius:16px;padding:18px;display:grid;gap:4px}
.next a:hover{border-color:var(--ink)}
.next b{font-size:17px}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--dark);color:var(--on-dark);padding:10px 16px;border-radius:999px;font-size:14px;font-weight:600}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* ---- library shell ---- */
.site{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding-block:18px;border-bottom:1px solid var(--rule)}
.site nav{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;font-size:15px;font-weight:500}
.site nav a{text-decoration:none}
.site nav a:hover{text-decoration:underline}
.btn.sm{min-height:40px;padding:8px 16px;font-size:14px}
.acct{font-size:14px;color:var(--muted)}
.lib-hero{padding-block:64px 32px;display:grid;gap:18px}
.lib-hero h1{font-size:clamp(40px,6vw,76px)}
.search{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:8px}
.search input{flex:1 1 280px;min-height:50px;border:1.5px solid var(--rule);border-radius:999px;padding:12px 20px;font:inherit;font-size:16px;background:var(--surface);color:var(--ink)}
.filters{display:flex;flex-wrap:wrap;gap:8px}
.filters button{border:1.5px solid var(--rule);background:var(--surface);border-radius:999px;padding:7px 14px;cursor:pointer;font-size:14px;font-weight:600;min-height:38px}
.filters button[aria-pressed="true"]{background:var(--dark);color:var(--on-dark);border-color:var(--dark)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;padding-block:24px 64px}
.rcard{display:flex;flex-direction:column;gap:10px;text-decoration:none;background:var(--surface);border:1px solid var(--rule);border-radius:20px;padding:24px;min-height:220px;transition:border-color .15s}
.rcard:hover{border-color:var(--ink)}
.rcard h3{font-size:22px;line-height:1.15}
.rcard h3 em{font-family:var(--serif);font-weight:400}
.rcard p{color:var(--body);font-size:15.5px;line-height:1.5}
.rcard .foot{margin-top:auto;display:flex;justify-content:space-between;gap:8px;font-size:13px;color:var(--muted)}
.empty{padding:48px 24px;text-align:center;color:var(--muted);border:1px dashed var(--rule);border-radius:20px}
.loading{color:var(--muted);padding-block:48px}
/* auth dialog */
dialog.auth{border:0;padding:0;background:transparent;max-width:min(520px,calc(100vw - 32px));width:100%}
dialog.auth::backdrop{background:rgba(0,0,0,.45)}
dialog.auth .gatecard{position:relative}
.xclose{position:absolute;top:14px;right:14px;width:40px;height:40px;border-radius:50%;border:1px solid var(--rule);background:var(--surface);cursor:pointer;font-size:20px;line-height:1}
.err{color:#B42318;font-size:14px}
:root[data-theme="dark"] .err{color:#FDA29B}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .err{color:#FDA29B}}
.code input{letter-spacing:.4em;font-family:var(--mono);font-size:22px;text-align:center}
.linkbtn{background:none;border:0;padding:0;text-decoration:underline;cursor:pointer;font-size:14px;color:var(--muted)}
.roadmap{list-style:none;margin:0;padding:0;display:grid;gap:0;border-left:2px solid var(--ink);margin-left:8px}
.roadmap li{padding:0 0 28px 24px;position:relative;display:grid;gap:6px}
.roadmap li::before{content:"";position:absolute;left:-9px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--bg);border:2px solid var(--ink)}
.roadmap p{color:var(--body)}
/* likes and counts */
.btn.like{gap:8px}.btn.like .n{font-variant-numeric:tabular-nums}
.btn.like.on{--hf:currentColor}
.btn.like:active svg{transform:scale(1.2)}.btn.like svg{transition:transform .15s ease}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.savecount{font-size:14px;color:var(--muted)}
.rcard .counts{display:inline-flex;align-items:center;gap:6px}
.rcard .counts .cnt{display:inline-flex;align-items:center;gap:4px}
.rcard .counts .cnt svg{width:14px!important;height:14px!important}
.rcard .counts .cnt.on{--hf:currentColor;color:var(--ink)}
.rcard .counts b{color:var(--ink);font-weight:600}
.endlike{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:56px;padding:22px 24px;border:1px solid var(--rule);border-radius:20px;background:var(--surface)}
.endlike[hidden]{display:none!important}
.endlike p{margin:0;font-size:18px;font-weight:600;color:var(--ink)}
/* save as PDF note (in-app browsers) */
.pdfnote{position:fixed;inset:0;z-index:2147483002;background:rgba(11,11,12,.35);display:grid;place-items:center;padding:20px}
.pdfcard{max-width:420px;background:var(--surface);color:var(--ink);border:1px solid var(--rule);border-radius:20px;padding:24px;box-shadow:0 24px 60px rgba(0,0,0,.25)}
.pdfcard h2{font-size:21px;line-height:1.2;margin:0 0 10px}.pdfcard p{color:var(--body);font-size:16px;margin:0 0 18px}
.print-only{display:none}

/* print and save as PDF: a clean, light, document layout */
@media print{
  @page{size:A4;margin:16mm 15mm 18mm}
  :root,:root[data-theme="dark"],:root:not([data-theme="light"]){
    --bg:#fff;--surface:#fff;--ink:#0B0B0C;--body:#2E2F33;--muted:#5B5D63;--rule:#D9D9D6;--mark:#F3E58A;--mark-ink:#0B0B0C;--soft:#F4F4F2;--dark:#0B0B0C;--on-dark:#fff;color-scheme:light}
  html,body{background:#fff!important}
  body{font-size:11pt;line-height:1.55;padding:0!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .print-only{display:block!important}
  .site,footer,.toast,.gate,#gate,.endlike,.pdfnote,.avq-btn,.avq-wrap,[data-account],.meta .btn,.savecount,.plus,.pipe,.phase,.detail,[data-component] .tabs,[data-component] > .cmp,#copyBtn,#pdfBtn{display:none!important}
  .col,.wide{max-width:none!important;margin:0!important}
  .print-brand{display:flex!important;align-items:center;gap:8px;font-size:9.5pt;color:var(--muted);border-bottom:1px solid var(--rule);padding-bottom:8px;margin-bottom:18px}
  .print-brand .dot{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#0B0B0C;color:#fff;font:600 7pt/1 var(--mono)}
  .print-brand b{color:#0B0B0C}.print-brand .pr-url{margin-left:auto;font-family:var(--mono);font-size:8.5pt}
  .hero{padding:0!important;margin:0 0 14px!important}
  .hero h1{font-size:26pt!important;line-height:1.05!important;margin:8px 0 10px!important}
  .hero .dek{font-size:12.5pt!important;margin:0 0 10px!important}
  .kicker .pill{border:1px solid #0B0B0C}
  .meta{margin:0!important}
  .tldr{break-inside:avoid;border:1px solid var(--rule)!important;box-shadow:none!important}
  section{margin:22px 0 0!important;padding:0!important}
  .sechead{break-after:avoid}
  h2,h3{break-after:avoid;page-break-after:avoid}
  h2{font-size:16pt!important}h3{font-size:12.5pt!important}
  p,li{orphans:3;widows:3}
  .card,.prod,.mistakes .card,.analogy .card,figure,.fig,table,pre,.print-steps li,.print-cases table,details{break-inside:avoid;page-break-inside:avoid}
  .card,.prod,.tldr{box-shadow:none!important}
  .card.on{background:#0B0B0C!important;color:#fff!important}
  .fig svg{max-height:120mm;width:100%;height:auto}
  pre{white-space:pre-wrap!important;word-break:break-word;font-size:9pt!important}
  details{border-color:var(--rule)!important}
  details > summary{list-style:none}
  details > summary::-webkit-details-marker{display:none}
  details .ans{display:block!important}
  .print-steps{list-style:none;padding:0;margin:8px 0 0;counter-reset:none}
  .print-steps li{border:1px solid var(--rule);border-radius:12px;padding:10px 14px;margin:0 0 8px}
  .print-steps h3{margin:0 0 4px!important;font-size:12pt!important}
  .print-steps p{margin:0 0 4px;font-size:10.5pt;color:var(--body)}
  .print-steps .pprod{color:var(--ink)}
  .print-cases .pcase{font-weight:600;margin:12px 0 6px;font-size:10.5pt}
  .print-cases table{width:100%;border-collapse:collapse;font-size:9.5pt;margin:0 0 6px}
  .print-cases th,.print-cases td{border:1px solid var(--rule);padding:6px 8px;text-align:left;vertical-align:top}
  .print-cases th{background:var(--soft)}
  .print-cases td.pgood{font-weight:700}
  .cmp table{font-size:9.5pt}
  a{text-decoration:none;color:#0B0B0C}
  .print-end{margin-top:26px;border-top:1px solid var(--rule);padding-top:12px;font-size:10pt;color:var(--body);break-inside:avoid}
  .print-end p{margin:0 0 6px}
}

/* ===================== v2 reading layout (all screens) ===================== */
.byline{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px}
.byline .savecount{font-size:14px;color:var(--muted)}
.actions{display:flex;flex-wrap:wrap;gap:10px}
.act{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 18px;border-radius:999px;border:1.5px solid var(--rule);background:var(--surface);color:var(--ink);font-weight:600;font-size:15px;cursor:pointer;transition:border-color .15s,background .15s}
.act:hover{border-color:var(--ink)}
.act svg{width:19px;height:19px;flex:none}
.act.like.on{--hf:currentColor;border-color:var(--ink)}
.act.on{--bf:currentColor;border-color:var(--ink);background:var(--dark);color:var(--on-dark)}
.act .n{font-variant-numeric:tabular-nums}
.act:active svg{transform:scale(1.15)}.act svg{transition:transform .15s ease}

/* steps: desktop keeps the interactive picker, the full timeline is for phones and print */
.msteps{list-style:none;padding:0;margin:0}

/* reading bar: appears after the title scrolls away */
.rbar{position:fixed;left:0;right:0;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 92%,transparent);-webkit-backdrop-filter:saturate(1.4) blur(10px);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--rule);transform:translateY(-110%);transition:transform .22s ease}
.rbar.show{transform:none}
.rbar-in{max-width:1040px;margin:0 auto;display:flex;align-items:center;gap:12px;padding:9px max(16px,env(safe-area-inset-left,0px))}
.rbar-t{flex:1;min-width:0;font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rbar-btn{flex:none;border:1.5px solid var(--ink);background:var(--surface);color:var(--ink);border-radius:999px;padding:7px 14px;font-weight:600;font-size:14px;cursor:pointer}
.rbar-p{height:3px;background:transparent}.rbar-p i{display:block;height:100%;width:0;background:var(--ink);transition:width .1s linear}
.toc{position:fixed;inset:0;z-index:60;background:rgba(11,11,12,.32);display:flex;align-items:flex-end;justify-content:center}
.toc[hidden]{display:none!important}
.toc-card{width:100%;max-width:560px;max-height:80vh;overflow:auto;background:var(--surface);color:var(--ink);border-radius:22px 22px 0 0;padding:18px 20px calc(18px + env(safe-area-inset-bottom,0px));box-shadow:0 -10px 40px rgba(0,0,0,.2)}
@media (min-width:641px){.toc{align-items:center}.toc-card{border-radius:22px}}
.toc-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;font-size:17px}
.toc-x{border:0;background:none;font-size:26px;line-height:1;color:var(--muted);cursor:pointer;padding:4px 6px}
.toc ol{list-style:none;margin:0;padding:0}
.toc li{border-top:1px solid var(--rule);padding:12px 2px;display:flex;flex-direction:column;gap:2px}
.toc li .mono{font-size:11px;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.toc li a{text-decoration:none;font-weight:600;font-size:16px;line-height:1.3}

/* diagrams and code: scroll sideways with a hint instead of being cut */
.figscroll{overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:thin}
.fig .swipe{display:none;margin:8px 0 0;font-size:12.5px;color:var(--muted);font-family:var(--mono)}
.fig.wide-fig .swipe{display:block}.fig.wide-fig.swiped .swipe{visibility:hidden}
.fig{overflow:hidden}

/* ===================== phones ===================== */
@media (max-width:640px){
  body{font-size:17px;line-height:1.65}
  /* compact header: brand plus account only */
  .site{padding-block:12px;gap:8px;flex-wrap:nowrap}
  .site .brand{font-size:15px;white-space:nowrap}
  .site nav{gap:8px;flex-wrap:nowrap;justify-content:flex-end}
  .site nav > a{display:none}
  .site nav [data-account]{gap:6px!important}
  .site nav .acct{display:none}
  .site nav .btn.sm{min-height:36px;padding:6px 12px;font-size:13px}

  .hero{padding-block:28px 18px;gap:14px}
  h1{font-size:clamp(32px,9.2vw,40px)!important;line-height:1.04;letter-spacing:-.035em}
  .dek{font-size:18px;line-height:1.55}
  .kicker{gap:6px 10px}.kicker .mono{font-size:11px;line-height:1.5}
  .author{font-size:14px}
  .actions{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;width:100%}
  .act{flex-direction:column;gap:3px;min-height:58px;padding:8px 4px;border-radius:16px;font-size:12.5px}
  .act svg{width:21px;height:21px}

  .tldr{padding:20px 18px;border-radius:18px}
  .tldr ol{padding-left:20px}
  section{padding-block:40px 4px}
  .sechead{margin-bottom:16px;gap:8px}
  h2{font-size:25px!important;line-height:1.15}
  .prose{gap:14px}
  .wide{padding:0}

  /* steps become a readable vertical timeline */
  [data-component="stepper"] .pipe,[data-component="stepper"] .phase,[data-component="stepper"] .detail{display:none!important}
  .msteps{display:block!important;position:relative}
  .msteps li{position:relative;margin:0 0 12px;padding:16px 16px 16px 58px;border:1px solid var(--rule);border-radius:16px;background:var(--surface)}
  .msteps li::before{content:"";position:absolute;left:31px;top:52px;bottom:-14px;width:1.5px;background:var(--rule)}
  .msteps li:last-child::before{display:none}
  .msteps .mn{position:absolute;left:14px;top:14px;width:34px;height:34px;border-radius:50%;background:var(--dark);color:var(--on-dark);display:grid;place-items:center;font:600 12px/1 var(--mono)}
  .msteps h3{font-size:18px;line-height:1.25;margin:4px 0 6px}
  .msteps h3 small{display:block;font-size:13.5px;font-weight:500;color:var(--muted);margin-top:2px}
  .msteps p{margin:0 0 8px;font-size:16px;color:var(--body)}
  .msteps .pprod{margin:10px 0 0;padding:10px 12px;border-radius:12px;background:var(--soft);font-size:14.5px;color:var(--ink)}
  .msteps .pprod b{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:500;margin-bottom:2px}

  /* comparison picker: one scrollable row of examples */
  [data-component="compare"] .tabs{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 -16px 12px;padding:2px 16px 4px;scrollbar-width:none}
  [data-component="compare"] .tabs::-webkit-scrollbar{display:none}
  [data-component="compare"] .tabs button{flex:none;white-space:nowrap}

  /* tables become stacked cards, nothing cut off */
  .cmp.stack{border:0;background:none;overflow:visible;border-radius:0}
  .cmp.stack table,.cmp.stack tbody,.cmp.stack tr,.cmp.stack td{display:block;width:100%;min-width:0!important}
  .cmp.stack thead{display:none}
  .cmp.stack tr{background:var(--surface);border:1px solid var(--rule);border-radius:16px;padding:12px 16px;margin:0 0 10px}
  .cmp.stack td{border:0!important;padding:6px 0!important;font-size:15.5px;line-height:1.45;color:var(--body)}
  .cmp.stack td:first-child{font-weight:700;color:var(--ink);font-size:17px;padding-top:2px!important;border-bottom:1px solid var(--rule)!important;padding-bottom:8px!important;margin-bottom:4px}
  .cmp.stack td:not(:first-child)::before{content:attr(data-label);display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:1px}
  .cmp.stack td[data-label=""]::before{display:none}
  .cmp.stack tr:has(td:nth-child(5)){display:grid;grid-template-columns:1fr 1fr;column-gap:14px}
  .cmp.stack tr:has(td:nth-child(5)) td{width:auto}
  .cmp.stack tr:has(td:nth-child(5)) td:first-child{grid-column:1/-1}

  /* diagrams */
  .fig{padding:14px;border-radius:16px}
  .fig svg{min-width:600px}
  .fig figcaption{font-size:14px}

  /* code */
  pre{font-size:13px!important;border-radius:12px!important;padding:14px!important;position:relative}
  pre.scrolls{box-shadow:inset -18px 0 14px -14px rgba(0,0,0,.18)}

  /* cards and blocks */
  .analogy{grid-template-columns:1fr!important;gap:10px}
  .card{padding:18px!important;border-radius:16px!important}
  .mistakes{grid-template-columns:1fr!important;gap:10px}
  .prod{padding:22px 18px!important;border-radius:18px!important}
  .prod ol{padding-left:20px}
  details summary{padding-block:14px!important;font-size:17px}
  .roadmap li{padding-left:22px}
  .endlike{flex-direction:column;align-items:stretch;text-align:center;padding:20px}
  .endlike .btn{justify-content:center}
  .gatecard{padding:24px 20px}
  footer{margin-top:48px;padding-bottom:96px}
}
@media print{.rbar,.toc,.actions,.byline .savecount,.fig .swipe{display:none!important}.figscroll{overflow:visible!important}.fig svg{min-width:0!important}}