:root {
  --paper: #ffffff;
  --ink: #16181d;
  --muted: #656a73;
  --line: #e3e5e8;
  --accent: #2b4c7e;
  --serif: "Iowan Old Style", Palatino, "Palatino Linotype", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #101214; --ink: #eceef1; --muted: #9aa0aa; --line: #262a30; --accent: #8fb0e6; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 1rem/1.55 var(--sans); }
a { color: var(--accent); }
img { display: block; max-width: 100%; height: auto; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

header.site, footer.site { padding: 1.25rem clamp(1rem, 4vw, 3rem); }
footer.site { color: var(--muted); font-size: .875rem; border-top: 1px solid var(--line); margin-top: 4rem; }
.brand { font: 600 1.25rem var(--serif); color: var(--ink); text-decoration: none; letter-spacing: .01em; }
main { padding: 0 clamp(1rem, 4vw, 3rem); }
main.narrow { max-width: 38rem; margin: 3rem auto; }

.grid { list-style: none; margin: 0; padding: 0; display: grid; gap: clamp(1rem, 3vw, 2.5rem);
        grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr)); }
.card { display: grid; gap: .35rem; color: inherit; text-decoration: none; }
.card img { aspect-ratio: 4 / 5; width: 100%; object-fit: cover; background: var(--line); }
.card .title { font: 500 1.125rem var(--serif); }
.card:hover .title, .card:focus-visible .title { text-decoration: underline; }
.meta { color: var(--muted); font-size: .9rem; margin: 0; }

.detail { display: grid; gap: 2rem; margin-top: 1rem; }
@media (min-width: 52rem) { .detail { grid-template-columns: minmax(0, 3fr) minmax(18rem, 2fr); align-items: start; } .info { position: sticky; top: 1.5rem; } }
.pics { display: grid; gap: 1rem; }
.info h1 { font: 500 clamp(1.75rem, 4vw, 2.5rem)/1.15 var(--serif); margin: 0 0 .25rem; }
fieldset { border: 0; padding: 0; margin: 1.5rem 0; display: grid; gap: .5rem; }
legend { font-weight: 600; margin-bottom: .5rem; }
.option { display: grid; grid-template-columns: auto 1fr auto; gap: .75rem; align-items: center; padding: .75rem 1rem; border: 1px solid var(--line); border-radius: 6px; cursor: pointer; }
.option:has(input:checked) { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
button#buy { width: 100%; padding: .9rem 1rem; font: 600 1rem var(--sans); color: #fff; background: var(--accent); border: 0; border-radius: 6px; cursor: pointer; }
button#buy:disabled { opacity: .6; cursor: progress; }
#buy-error { color: #b3261e; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }