/* OPLYX — guias públicos.
   HTML estático servido no ápice: sem build, sem JavaScript, legível por
   qualquer crawler. Identidade herdada da landing (Fraunces + DM Sans). */

:root {
  --ink: #0a0a0a;
  --ink-mid: #45504c;
  --ink-faint: #6f7a76;
  --paper: #ffffff;
  --paper-alt: #f7f8f7;
  --rule: #e3e7e5;
  --accent: #047857;
  --accent-soft: #e7f4ef;
  --warn-soft: #fdf4e3;
  --warn-line: #b4791c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }

header.top {
  border-bottom: 1px solid var(--rule);
  padding: 18px 0;
  margin-bottom: 48px;
}
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
header.top img { height: 26px; width: auto; display: block; }
header.top a.cta {
  font-size: 14px; font-weight: 500; color: var(--accent);
  text-decoration: none; white-space: nowrap;
}
header.top a.cta:hover { text-decoration: underline; }

.eyebrow {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-faint); margin: 0 0 12px;
}

h1 {
  font-family: Fraunces, Georgia, serif;
  font-size: clamp(30px, 5.5vw, 44px);
  line-height: 1.1; letter-spacing: -0.02em;
  margin: 0 0 20px; text-wrap: balance;
}

h2 {
  font-family: Fraunces, Georgia, serif;
  font-size: clamp(21px, 3.4vw, 27px);
  line-height: 1.25; letter-spacing: -0.01em;
  margin: 44px 0 14px; text-wrap: balance;
}

h3 { font-size: 17px; font-weight: 600; margin: 28px 0 8px; }

p { margin: 0 0 16px; }
.lede { font-size: 19px; color: var(--ink-mid); margin-bottom: 32px; }

a { color: var(--accent); }

ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 8px; }

strong { font-weight: 600; }

.formula {
  background: var(--paper-alt);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 16px 18px;
  margin: 0 0 20px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 14.5px;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
}

.callout {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 14px 18px;
  margin: 0 0 22px;
  border-radius: 0 6px 6px 0;
}
.callout.warn { border-left-color: var(--warn-line); background: var(--warn-soft); }
.callout p:last-child { margin-bottom: 0; }

.tablewrap { overflow-x: auto; margin: 0 0 22px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; min-width: 420px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--rule); }
th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); font-weight: 600; }
td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

.faq { margin-top: 44px; border-top: 1px solid var(--rule); padding-top: 8px; }
.faq details { border-bottom: 1px solid var(--rule); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+ "; color: var(--accent); font-weight: 700; }
.faq details[open] summary::before { content: "− "; }
.faq details p { margin: 12px 0 0; color: var(--ink-mid); }
.faq summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.cards { display: grid; gap: 14px; margin: 0 0 32px; }
.card {
  border: 1px solid var(--rule); border-radius: 8px; padding: 18px 20px;
  text-decoration: none; color: inherit; display: block;
}
.card:hover { border-color: var(--accent); background: var(--paper-alt); }
.card h2 { font-size: 19px; margin: 0 0 6px; }
.card p { margin: 0; color: var(--ink-mid); font-size: 15px; }

footer.bottom {
  margin-top: 64px; border-top: 1px solid var(--rule);
  padding: 28px 0 56px; font-size: 14px; color: var(--ink-faint);
}
footer.bottom a { color: var(--accent); }

@media (max-width: 520px) {
  body { font-size: 16px; }
  .lede { font-size: 17.5px; }
}