/* DCEng Pro — "prancheta de obra": papel técnico frio, tinta escura e amarelo de sinalização só onde o olho precisa ir.
   Tokens: --ink (texto), --paper (fundo), --sheet (superfícies), --rule (linhas), --signal (amarelo de destaque). */
:root{
  --paper:#f4f6f9; --sheet:#ffffff; --ink:#0d1726; --ink-2:#344155; --muted:#647086; --rule:#dfe4ec; --grid:rgba(13,23,38,.045);
  --signal:#ffc21a; --signal-ink:#0d1726; --signal-soft:#fff4cc;
  --good:#12805c; --good-soft:#e3f5ee; --warn:#b86e00; --warn-soft:#fff1db; --bad:#c2321f; --bad-soft:#fde8e5;
  --shadow:0 1px 2px rgba(13,23,38,.06),0 8px 24px rgba(13,23,38,.06);
  --display:"Bricolage Grotesque","Segoe UI",system-ui,sans-serif;
  --body:"Public Sans","Segoe UI",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#0a111d; --sheet:#111b2b; --ink:#eef2f8; --ink-2:#c5cedc; --muted:#8f9bb0; --rule:#22304a; --grid:rgba(238,242,248,.04);
  --signal:#ffc94a; --signal-ink:#0a111d; --signal-soft:#2c2614;
  --good:#4fd1a1; --good-soft:#10291f; --warn:#f5b04c; --warn-soft:#2d2210; --bad:#ff7d6b; --bad-soft:#331513;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.25); color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0a111d; --sheet:#111b2b; --ink:#eef2f8; --ink-2:#c5cedc; --muted:#8f9bb0; --rule:#22304a; --grid:rgba(238,242,248,.04);
  --signal:#ffc94a; --signal-ink:#0a111d; --signal-soft:#2c2614;
  --good:#4fd1a1; --good-soft:#10291f; --warn:#f5b04c; --warn-soft:#2d2210; --bad:#ff7d6b; --bad-soft:#331513;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.25); color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.6 var(--body);-webkit-font-smoothing:antialiased}
.gutter{padding-left:max(18px,env(safe-area-inset-left,0px));padding-right:max(18px,env(safe-area-inset-right,0px))}
.wrap{max-width:1140px;margin:0 auto}
.read{max-width:700px;margin:0 auto}
a{color:inherit}
h1,h2,h3{font-family:var(--display);margin:0;line-height:1.08;letter-spacing:-.02em;text-wrap:balance}
h1{font-size:clamp(2.2rem,5.4vw,4rem);font-weight:800}
h2{font-size:clamp(1.6rem,3vw,2.3rem);font-weight:800}
h3{font-size:1.2rem;font-weight:700;letter-spacing:-.01em}
p{margin:0}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--ink-2);max-width:58ch}
.kicker{font:500 .78rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.muted{color:var(--muted)}
.small{font-size:.9rem}
.mark{background:linear-gradient(transparent 58%,var(--signal) 58%,var(--signal) 88%,transparent 88%);padding:0 .08em}
.section{padding-block:clamp(56px,8vw,104px)}
.stack{display:grid;gap:16px}

/* barra superior */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--rule)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:21;background:var(--paper)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px}
.brand{display:flex;align-items:center;gap:8px;font:800 1.15rem var(--display);text-decoration:none;letter-spacing:-.02em}
.brand i{font:500 .68rem var(--mono);font-style:normal;letter-spacing:.12em;background:var(--signal);color:var(--signal-ink);padding:3px 6px;border-radius:3px}
.nav{display:flex;align-items:center;gap:22px;font-size:.95rem}
.nav a{text-decoration:none;color:var(--ink-2)}
.nav a:hover{color:var(--ink)}
.nav .btn{color:var(--signal-ink)}
@media (max-width:760px){.nav a:not(.btn){display:none}}

/* botões */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:700 1rem var(--body);padding:13px 20px;border-radius:10px;border:2px solid var(--signal);background:var(--signal);color:var(--signal-ink);text-decoration:none;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}
.btn:hover{transform:translateY(-1px);box-shadow:0 6px 18px color-mix(in srgb,var(--signal) 45%,transparent)}
.btn.ghost{background:transparent;border-color:var(--rule);color:var(--ink)}
.btn.ghost:hover{border-color:var(--ink-2);box-shadow:none}
.btn.sm{padding:8px 13px;font-size:.88rem;border-radius:8px}
.btn .arrow{transition:transform .15s ease}
.btn:hover .arrow{transform:translateX(3px)}
:focus-visible{outline:3px solid var(--signal);outline-offset:2px}

/* superfícies */
.sheet{background:var(--sheet);border:1px solid var(--rule);border-radius:16px;box-shadow:var(--shadow)}
.chip{display:inline-flex;align-items:center;gap:6px;font:500 .78rem var(--mono);padding:4px 10px;border-radius:99px;background:var(--signal-soft);color:var(--ink)}
.chip.good{background:var(--good-soft);color:var(--good)} .chip.warn{background:var(--warn-soft);color:var(--warn)} .chip.bad{background:var(--bad-soft);color:var(--bad)}
.grid-paper{background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:28px 28px}

/* rodapé */
.foot{border-top:1px solid var(--rule);background:var(--sheet)}
.foot .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;padding-block:28px;font-size:.9rem;color:var(--muted)}
.foot a{color:var(--ink-2)}

/* artigo */
.article{display:grid;gap:20px}
.article h2{font-size:1.6rem;margin-top:18px}
.article p,.article li{color:var(--ink-2)}
.article ul{margin:0;padding-left:22px;display:grid;gap:8px}
.formula{font:500 .95rem var(--mono);background:var(--sheet);border:1px solid var(--rule);border-left:4px solid var(--signal);border-radius:10px;padding:14px 16px;overflow-x:auto;color:var(--ink)}

/* página de guia */
.ahead{padding-block:clamp(40px,6vw,72px) 8px;display:grid;gap:16px}
.ahead h1{font-size:clamp(2rem,4.6vw,3.2rem)}
.ameta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.9rem;color:var(--muted)}
.tldr{padding:20px 22px;border-left:4px solid var(--signal);display:grid;gap:8px}
.tldr ul{margin:0;padding-left:20px;display:grid;gap:4px}
.inline-cta{padding:24px;display:grid;gap:12px;background:var(--signal-soft);border-color:var(--signal)}
.progress-read{position:fixed;left:0;top:0;height:3px;background:var(--signal);z-index:40;width:0}
.callout{padding:16px 18px;border-radius:12px;border:1px solid var(--rule);background:var(--sheet);display:grid;gap:6px}
.callout.warn{border-left:4px solid var(--warn)} .callout.bad{border-left:4px solid var(--bad)}
.steps-list{list-style:none;margin:0;padding:0;display:grid;gap:14px;counter-reset:st}
.steps-list>li{counter-increment:st;display:grid;grid-template-columns:40px minmax(0,1fr);gap:14px;align-items:start}
.steps-list>li::before{content:counter(st);width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font:700 .95rem var(--mono);background:var(--ink);color:var(--paper)}
.steps-list h3{margin-bottom:4px}
.checklist{padding:22px;display:grid;gap:12px}
.checklist .bar{height:8px;border-radius:8px;background:var(--rule);overflow:hidden}
.checklist .bar span{display:block;height:100%;background:var(--good);width:0;transition:width .3s ease}
.checklist label{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;border-radius:10px;border:1px solid var(--rule);cursor:pointer;color:var(--ink-2)}
.checklist label:has(input:checked){background:var(--good-soft);border-color:var(--good);color:var(--ink)}
.checklist input{width:20px;height:20px;margin-top:2px;flex:none;accent-color:var(--good)}
.next-guides{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.next-guides a{padding:18px;text-decoration:none;display:grid;gap:6px}
.next-guides a:hover{border-color:var(--signal)}

/* tabelas */
.scroll{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:.92rem}
th,td{padding:9px 10px;border-bottom:1px solid var(--rule);text-align:right;white-space:nowrap}
th:first-child,td:first-child{text-align:left;white-space:normal}
th{font:500 .72rem var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
td{font-family:var(--mono);font-variant-numeric:tabular-nums}
td:first-child{font-family:var(--body)}

/* entrada suave das seções (estado de repouso visível) */
@media (prefers-reduced-motion:no-preference){
  .rise{animation:rise .6s ease both}
  .rise.d1{animation-delay:.08s}.rise.d2{animation-delay:.16s}.rise.d3{animation-delay:.24s}
  @keyframes rise{from{transform:translateY(12px)}to{transform:none}}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}