/* Shellback Labs site. Plain CSS: system fonts, light and dark from the reader's settings. */

:root {
  --bg: #fbfaf8;
  --text: #1c1c1e;
  --muted: #5d5d63;
  --rule: #e4e1db;
  --accent: #0e6ba8;
  --card: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0c;
    --text: #f2f2f4;
    --muted: #a1a1a8;
    --rule: #2c2c2e;
    --accent: #4ea3e0;
    --card: #1c1c1e;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

header.site {
  max-width: 680px;
  margin: 0 auto;
  padding: 20px 20px 0;
  font-size: 15px;
}

header.site a { color: var(--muted); text-decoration: none; }
header.site a:hover { color: var(--text); }

h1 { font-size: 34px; line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 21px; margin: 36px 0 8px; }
p, ul { margin: 0 0 14px; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }

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

.lede { font-size: 19px; color: var(--muted); }
.meta { color: var(--muted); font-size: 15px; }

pre.mark {
  margin: 0 0 28px;
  font: 13px/1.25 ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--muted);
  overflow-x: auto;
}

.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 18px;
  padding: 18px 20px;
  margin: 24px 0;
}

.card h2 { margin-top: 0; }

footer {
  border-top: 1px solid var(--rule);
  margin-top: 48px;
  padding-top: 16px;
  color: var(--muted);
  font-size: 14px;
}