:root {
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.65;
  font-size: 18px;
  color-scheme: light;
  --ink: #102033;
  --muted: #44566c;
  --bg: #f4f8fb;
  --surface: #ffffff;
  --brand: #083b66;
  --brand-strong: #052d4e;
  --accent: #006f7a;
  --accent-soft: #e9f7f8;
  --warm: #6f4d00;
  --warm-soft: #fff6da;
  --line: #b7c7d6;
  --focus: #000000;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); }
a { color: #004f93; text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }
a:focus, button:focus { outline: 4px solid var(--focus); outline-offset: 3px; }

.skip-link { position: absolute; left: -10000px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.skip-link:focus { left: 1rem; top: 1rem; width: auto; height: auto; padding: .8rem 1rem; background: #fff; color: #000; border: 2px solid #000; z-index: 1000; }

.site-header { background: var(--brand); color: #fff; border-bottom: 4px solid #031f36; }
.header-inner, .footer-inner { max-width: 1120px; margin: 0 auto; padding: 1rem 1.25rem; }
.site-name { margin: 0 0 .7rem; font-size: 1.45rem; font-weight: 800; }
.site-name a { color: #fff; text-decoration: none; }
.site-header nav ul, .course-nav ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .55rem 1rem; }
.site-header nav a { color: #fff; font-weight: 700; }
nav a[aria-current="page"] { text-decoration-thickness: 4px; text-decoration-color: currentColor; }

.course-nav { background: #e9f0f6; border-bottom: 1px solid var(--line); padding: .85rem max(1rem, calc((100vw - 1120px) / 2 + 1.25rem)); }
.course-nav .nav-title { margin: 0 0 .45rem; font-weight: 800; color: var(--brand-strong); }
.course-nav a { color: #003f76; }

main { max-width: 960px; margin: 0 auto; padding: 2rem 1.25rem 3rem; }
main.wide { max-width: 1120px; }
h1, h2, h3 { line-height: 1.22; color: var(--brand-strong); }
h1 { font-size: clamp(2rem, 5vw, 3.35rem); margin: 0 0 1rem; }
h2 { margin-top: 2.1rem; }
h3 { margin-top: 1.5rem; }
p { max-width: 78ch; }
.lead { font-size: 1.22rem; color: #263f58; max-width: 68ch; }
.eyebrow { margin: 0 0 .4rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; color: var(--accent); }

.hero { background: linear-gradient(135deg, #ffffff 0%, #edf8fa 100%); border: 1px solid var(--line); border-radius: 18px; padding: clamp(1.25rem, 4vw, 2.5rem); box-shadow: 0 8px 28px rgba(28,57,82,.08); }
.hero h1 { max-width: 16ch; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.3rem; }
.button { display: inline-block; padding: .78rem 1.05rem; border-radius: 9px; background: var(--brand); color: #fff; font-weight: 800; text-decoration: none; border: 2px solid var(--brand); }
.button:hover { background: var(--brand-strong); }
.button.secondary { background: #fff; color: var(--brand); }
.button.secondary:hover { background: #edf4fa; }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1rem; margin: 1.25rem 0; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 1.2rem; }
.card h2, .card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
.callout { border-left: 6px solid var(--accent); background: var(--accent-soft); padding: 1rem 1.15rem; margin: 1.35rem 0; border-radius: 0 10px 10px 0; }
.warning { border-left-color: #a86c00; background: var(--warm-soft); }
.reward, .note { border-left: 5px solid var(--accent); background: #f1fbfc; padding: .85rem 1rem; margin: 1rem 0; }

.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; margin: 1.2rem 0; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 1rem; }
.stat strong { display: block; font-size: 1.15rem; color: var(--brand); }

.contact-box { background: #fff; border: 2px solid var(--brand); border-radius: 14px; padding: 1.3rem; }
.contact-number { font-size: 1.35rem; font-weight: 800; }
.senha { font-size: 1.2em; font-weight: 800; }

section { margin-bottom: 2rem; }
ul, ol { padding-left: 1.5rem; }
li + li { margin-top: .32rem; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; background: #fff; }
th, td { border: 1px solid #71869a; padding: .65rem; text-align: left; vertical-align: top; }
caption { font-weight: 800; margin-bottom: .5rem; text-align: left; }
code { font-family: Consolas, monospace; }

.site-footer { border-top: 3px solid #8aa0b5; background: #e8eff5; color: #263b4e; }
.site-footer p { margin: .35rem 0; max-width: none; }

@media (max-width: 760px) {
  :root { font-size: 17px; }
  .grid, .stats { grid-template-columns: 1fr; }
  .site-header nav ul, .course-nav ul { display: block; }
  .site-header nav li, .course-nav li { margin: .35rem 0; }
  main { padding: 1.35rem 1rem 2.5rem; }
  .header-inner, .footer-inner { padding-left: 1rem; padding-right: 1rem; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }