:root {
  color-scheme: light;
  --bg: #f8fafc;
  --panel: #ffffff;
  --panel-soft: #f1f5f9;
  --border: #e2e8f0;
  --ink: #0f172a;
  --muted: #475569;
  --accent: #1d4ed8;
  --ok: #047857;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.top {
  max-width: 900px;
  margin: 0 auto;
  padding: 22px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--border);
}
.brand { color: var(--ink); font-weight: 800; }
.brand .mark {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-right: 8px;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  object-fit: cover;
  font-size: 11px;
}
nav { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13px; }
main { max-width: 900px; margin: 0 auto; padding: 46px 20px 80px; }
.kicker { margin: 0 0 8px; color: var(--accent); font-size: 11px; font-weight: 800; letter-spacing: .14em; }
h1 { margin: 0; font-size: clamp(28px, 5vw, 42px); letter-spacing: -.04em; line-height: 1.1; }
.sub { margin: 12px 0 32px; color: var(--muted); font-size: 15px; max-width: 62ch; }
h2 { margin: 0 0 8px; font-size: 18px; letter-spacing: -.02em; }
h3 { margin: 0 0 4px; font-size: 15px; }
p, li { color: var(--muted); font-size: 15px; }
ul { padding-left: 20px; }
li { margin: 5px 0; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  margin-bottom: 14px;
}
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
a.card { display: block; color: var(--ink); }
a.card:hover { border-color: var(--accent); text-decoration: none; }
a.card span { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; }
.tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  border-radius: 99px;
  background: rgba(37, 99, 235, .12);
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .04em;
}
.tag.ok { background: rgba(5, 150, 105, .12); color: var(--ok); }
.meta { color: var(--muted); font-size: 12px; }
.timeline { border-left: 1px solid var(--border); padding-left: 20px; }
.timeline .card { position: relative; }
.timeline .card::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 26px;
  width: 10px;
  height: 10px;
  border-radius: 99px;
  background: var(--accent);
}
footer {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
}
footer a { color: var(--muted); }
.table-wrap { overflow-x: auto; margin-top: 10px; }
.table-wrap table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table-wrap th, .table-wrap td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.table-wrap th { color: var(--muted); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: .04em; }
.table-wrap tr:last-child td { border-bottom: 0; }
@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .top { align-items: flex-start; flex-direction: column; }
  main { padding-top: 34px; }
}

/* ---------- Entrada de leitura (2026-11) ----------
   Só opacity/transform, 240ms, sem depender da animação para o conteúdo
   aparecer: reduced-motion desliga tudo e o texto continua visível. */
@keyframes doc-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes doc-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

main {
  animation: doc-in 240ms cubic-bezier(.2, .8, .2, 1) both;
}

main .card {
  animation: doc-fade-in 220ms cubic-bezier(.2, .8, .2, 1) both;
}

main .card:nth-child(2) { animation-delay: 40ms; }
main .card:nth-child(3) { animation-delay: 80ms; }
main .card:nth-child(4) { animation-delay: 120ms; }
main .card:nth-child(n + 5) { animation-delay: 160ms; }

@media (prefers-reduced-motion: reduce) {
  main,
  main .card {
    animation: none !important;
  }
}
/* ---------- Ritmo de leitura (2026-11) ----------
   As páginas de guia liam como documento contínuo: sem separação entre
   seções e com marcador de lista genérico. Régua antes do h2 e ponto neutro
   dão estrutura sem virar card. */
h2 {
  margin: 40px 0 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

main > h2:first-child {
  margin-top: 10px;
  padding-top: 0;
  border-top: 0;
}

ul {
  list-style: none;
  padding-left: 0;
}

ul li {
  position: relative;
  padding-left: 18px;
}

ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--muted) 70%, transparent);
}
/* A régua de seção não vale dentro de card: o card já tem padding e borda
   próprios, então a régua virava "espaço fantasma" acima do título. */
.card h2,
.card h3 {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

/* WCAG 1.4.1: link no meio de texto precisa de algo alem da cor. */
p a, li a, td a, dd a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Calculadora de preco (/calculadora-preco) */
.calc { display: grid; gap: 14px; }
.calc-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.calc label { display: grid; gap: 6px; font-size: 13px; font-weight: 600; }
.calc input {
  min-height: 44px; padding: 10px 12px; border: 1px solid var(--border);
  border-radius: 10px; background: var(--panel-soft); color: var(--ink);
  font: inherit; font-variant-numeric: tabular-nums;
}
.calc input:focus-visible { outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 35%, transparent); border-color: var(--accent); }
.calc small { color: var(--muted); font-weight: 400; }
.calc-results { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 4px; }
.calc-out { border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; background: var(--panel); }
.calc-out dt { color: var(--muted); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; margin: 0; }
.calc-out dd { margin: 4px 0 0; font-size: 22px; font-weight: 800; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.calc-out.is-main { border-color: var(--accent); }
.calc-note { color: var(--muted); font-size: 12px; }
.calc-warn { color: var(--warn); font-size: 13px; margin: 0; }
@media (max-width: 640px) { .calc-grid, .calc-results { grid-template-columns: 1fr; } }