@font-face {
  font-family: "Atkinson";
  src: url("/fonts/AtkinsonHyperlegibleNext-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Atkinson";
  src: url("/fonts/AtkinsonHyperlegibleNext-Bold.ttf") format("truetype");
  font-weight: 700;
  font-display: swap;
}

/* As cores do app: papel, tinta e o azul do ícone. */
:root {
  --paper: #faf7f0;
  --card: #ffffff;
  --ink: #1f2a33;
  --ink-soft: #55616b;
  --line: #e4ded1;
  --blue: #1d5b79;
  --margin: #e07a7a;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14181c;
    --card: #1c2227;
    --ink: #eef0f1;
    --ink-soft: #a9b3ba;
    --line: #2c353c;
    --blue: #7fb8d4;
    --margin: #b05a5a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Atkinson", system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

a {
  color: var(--blue);
  text-underline-offset: 3px;
}

header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}
header img {
  width: 48px;
  height: 48px;
}
header a {
  color: var(--ink);
  font-weight: 700;
  font-size: 20px;
  text-decoration: none;
}

h1 {
  font-size: 32px;
  line-height: 1.2;
  margin: 0 0 8px;
}
h2 {
  font-size: 21px;
  line-height: 1.3;
  margin: 36px 0 8px;
}
p,
ul {
  margin: 0 0 14px;
}
ul {
  padding-left: 22px;
}
li {
  margin-bottom: 6px;
}

.muted {
  color: var(--ink-soft);
}

/* O resumo parece uma folha do caderno, com a margem vermelha. */
.summary {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--margin);
  border-radius: 12px;
  padding: 18px 20px 6px;
  margin: 24px 0 8px;
}

.hero {
  text-align: center;
  padding-top: 48px;
}
.hero img {
  width: 120px;
  height: 120px;
}
.hero p {
  font-size: 20px;
}
.links {
  list-style: none;
  padding: 0;
  margin-top: 32px;
}

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 16px;
  color: var(--ink-soft);
}