/* LFD Chatbot — mesma identidade do site da LFD (paleta cobalto, IBM Plex). */
:root {
  --paper: #f6f8fb;
  --paper-2: #e9eef6;
  --card: #ffffff;
  --ink: #0d1526;
  --ink-2: #39445a;
  --muted: #5a6478;
  --line: #d3dae6;
  --accent: #2d5bff;
  --accent-strong: #1f44e0;
  --ok: #0e9f6e;
  --btn-bg: #1f44e0;
  --btn-bg-hover: #2d5bff;
  --head: "IBM Plex Sans Condensed", "IBM Plex Sans", system-ui, sans-serif;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0b1120;
    --paper-2: #121a2e;
    --card: #111a2d;
    --ink: #e8edf6;
    --ink-2: #bcc6d8;
    --muted: #8e9ab0;
    --line: #26314a;
    --accent: #6f8dff;
    --accent-strong: #9bb0ff;
    --ok: #34d399;
    --btn-bg: #2d5bff;
    --btn-bg-hover: #1f44e0;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-strong); text-underline-offset: 3px; }
a:hover { color: var(--accent); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 640px) { .wrap { padding: 0 32px; } }

header.top { border-bottom: 1px solid var(--line); background: var(--card); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 700 19px var(--head); }
.brand img { width: 32px; height: 32px; }
nav.links { display: flex; gap: 18px; font-size: 14px; }
nav.links a { color: var(--ink-2); text-decoration: none; }
nav.links a:hover { color: var(--accent-strong); }

.label { font: 500 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 0; }

.hero { padding: 72px 0 48px; }
.hero h1 { font: 700 clamp(36px, 6vw, 60px)/1.04 var(--head); margin: 16px 0 0; max-width: 16ch; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lead { font-size: clamp(17px, 2.2vw, 20px); color: var(--ink-2); max-width: 60ch; margin: 20px 0 0; }
.cta { display: inline-block; margin-top: 28px; background: var(--btn-bg); color: #fff; padding: 12px 20px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.cta:hover { background: var(--btn-bg-hover); color: #fff; }

.grid { display: grid; gap: 16px; grid-template-columns: 1fr; padding: 16px 0 64px; }
@media (min-width: 760px) { .grid { grid-template-columns: repeat(3, 1fr); } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card h2 { font: 700 19px var(--head); margin: 0 0 8px; }
.card p { margin: 0; color: var(--ink-2); font-size: 15px; }

.steps { border-top: 1px solid var(--line); padding: 48px 0 64px; }
.steps h2, .doc h2 { font: 700 26px var(--head); margin: 0 0 16px; }
.steps ol { margin: 0; padding-left: 20px; color: var(--ink-2); }
.steps li { margin: 8px 0; }

.doc { max-width: 760px; padding: 48px 0 72px; }
.doc h1 { font: 700 clamp(32px, 4.6vw, 48px)/1.08 var(--head); margin: 12px 0 24px; }
.doc h2 { font-size: 22px; margin-top: 36px; }
.doc p, .doc li { color: var(--ink-2); }
.doc ul { padding-left: 20px; }
.doc strong { color: var(--ink); }

footer.bottom { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; padding: 24px 0 40px; }
footer.bottom .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
footer.bottom a { color: var(--muted); }