:root {
  --bg: #ffffff;
  --fg: #111418;
  --muted: #5b6470;
  --line: #e3e6ea;
  --accent: #1f5fbf;
  --accent-fg: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --fg: #eef1f4;
    --muted: #9aa4b0;
    --line: #262c34;
    --accent: #5b9bff;
    --accent-fg: #0f1216;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}
a { color: var(--accent); }
main, .top, footer { max-width: 680px; margin: 0 auto; padding: 0 16px; }
.top { padding-top: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.brand { color: var(--fg); text-decoration: none; font-weight: 700; letter-spacing: 0.02em; }
.hero { padding: 48px 0 24px; }
.hero h1 { font-size: 2rem; margin: 0 0 8px; }
.hero p { color: var(--muted); margin: 0; }
.list { list-style: none; padding: 0; margin: 0 0 48px; border-top: 1px solid var(--line); }
.list a { display: grid; grid-template-columns: 4rem 1fr; gap: 0 12px; padding: 16px 0; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--fg); }
.list-num { grid-row: span 2; font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.list-title { font-weight: 600; }
.list-product { color: var(--muted); font-size: 0.95rem; }
.essential { padding: 40px 0 48px; }
.label { margin: 0; color: var(--muted); text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.8rem; }
.num { margin: 0; font-size: 4.5rem; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.essential h1 { margin: 16px 0 4px; font-size: 1.75rem; }
.product { margin: 0 0 16px; color: var(--muted); }
.summary { margin: 0 0 16px; }
.specs { list-style: none; padding: 0; margin: 0 0 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.specs li { border: 1px solid var(--line); padding: 4px 10px; font-size: 0.9rem; font-variant-numeric: tabular-nums; }
.verdict { font-weight: 600; margin: 0 0 24px; }
.essential h2 { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 32px 0 8px; }
.items { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.item { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.item-name { font-weight: 500; }
.btn { display: inline-block; background: var(--accent); color: var(--accent-fg); text-decoration: none; padding: 10px 14px; font-weight: 600; white-space: nowrap; border-radius: 0; }
.btn-ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
footer { padding-top: 24px; padding-bottom: 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; }
@media (max-width: 420px) {
  .item { flex-direction: column; align-items: flex-start; }
  .num { font-size: 3.5rem; }
}