:root {
  color: #111;
  background: #fff;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { width: min(760px, calc(100% - 32px)); margin: 0 auto; }
header { padding: 28px 0 16px; border-bottom: 1px solid #ddd; }
.brand { color: #111; font-size: 20px; font-weight: 700; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 10px; }
a { color: #0645ad; }
main { min-height: 70vh; padding: 36px 0 64px; }
h1 { margin: 0 0 24px; font-size: 32px; line-height: 1.2; }
h2 { margin-top: 36px; font-size: 22px; }
h3 { font-size: 17px; }
p, li { max-width: 70ch; }
form { display: flex; gap: 8px; margin: 24px 0; }
input, button, select { border: 1px solid #aaa; border-radius: 0; padding: 10px 12px; font: inherit; background: #fff; }
input { flex: 1; min-width: 0; }
button { color: #fff; background: #111; border-color: #111; cursor: pointer; }
button:disabled { opacity: .6; cursor: default; }
.status { margin: 20px 0; padding: 12px 0; border-top: 1px solid #ddd; border-bottom: 1px solid #ddd; }
.status:empty { display: none; }
.muted, footer { color: #666; font-size: 14px; }
.analysis { padding: 18px 0; border-top: 1px solid #ddd; }
.analysis:last-child { border-bottom: 1px solid #ddd; }
.analysis h2 { margin: 0 0 4px; font-size: 18px; }
.meta { display: flex; flex-wrap: wrap; gap: 12px; color: #666; font-size: 14px; }
.score { color: #111; font-weight: 700; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 6px; border-bottom: 1px solid #ddd; text-align: left; vertical-align: top; }
footer { border-top: 1px solid #ddd; padding: 18px 0 40px; }

@media (max-width: 560px) {
  form { display: block; }
  form button { width: 100%; margin-top: 8px; }
}