:root {
  color-scheme: light;
  --paper: #f9faff;
  --ink: #17234a;
  --blue: #2348b7;
  --muted: #515d78;
  --line: #d6def1;
  font: 1rem/1.6 system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); }
a { color: #173eaa; text-underline-offset: .2em; }
:focus-visible { outline: 3px solid #244ed2; outline-offset: 4px; }
img { display: block; max-width: 100%; height: auto; }
p { margin: 0 0 .9rem; }
.wrap { width: min(1120px, calc(100% - 2.5rem)); margin-inline: auto; }
.skip { position: absolute; z-index: 2; top: .5rem; left: .5rem; padding: .65rem; background: white; transform: translateY(-160%); }
.skip:focus { transform: none; }
.top, .footer { display: flex; justify-content: space-between; align-items: center; gap: 1.15rem; padding-block: 1rem; border-bottom: 1px solid var(--line); }
.top nav, .footer nav { display: flex; flex-wrap: wrap; gap: .5rem 1rem; }
.brand { display: inline-flex; align-items: center; gap: .65rem; text-decoration: none; font-weight: 790; line-height: 1.15; }
.mark { display: inline-block; flex: none; width: 39px; height: 39px; border-radius: 50%; background: #2449bd; position: relative; }
.mark::before, .mark::after { content: ""; position: absolute; width: 16px; height: 12px; border: 2px solid white; left: 11px; transform: rotate(-27deg); }
.mark::before { top: 10px; border-radius: 3px 3px 0 0; }
.mark::after { top: 17px; border-radius: 0 0 3px 3px; }
h1, h2, h3 { line-height: 1.06; margin: 0 0 .75rem; }
h1 { font-size: clamp(2.65rem, 7vw, 5.75rem); letter-spacing: -.065em; }
h2 { font-size: clamp(1.7rem, 4vw, 2.65rem); letter-spacing: -.04em; }
h3 { font-size: 1.3rem; letter-spacing: -.025em; }
.lead { color: var(--muted); font-size: clamp(1.15rem, 2.6vw, 1.4rem); }
.hero { display: grid; grid-template-columns: 1fr 1.45fr; align-items: center; gap: 2rem; margin-block: 1.5rem; padding: clamp(1.15rem, 4vw, 2.2rem); background: #e9efff; border-radius: 1.4rem; }
.hero img { border-radius: 1rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: .55rem 1rem; border: 1px solid #173eaa; border-radius: 99px; background: #173eaa; color: white; font: inherit; font-weight: 750; text-decoration: none; cursor: pointer; }
.button:hover { background: #102d86; }
.content { padding-block: 1.75rem; }
.tabs { display: flex; flex-wrap: wrap; gap: .5rem; margin-block: 1rem 1.25rem; }
.tabs a { display: inline-block; border: 1px solid var(--line); border-radius: 99px; padding: .35rem .65rem; background: white; font-weight: 660; }
.style-row { display: grid; grid-template-columns: minmax(160px, .8fr) minmax(0, 2.2fr); gap: 1rem; padding-block: 1.15rem; border-top: 1px solid var(--line); scroll-margin-top: 1rem; }
.style-row ul, .guide-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: .6rem; }
.style-row li { display: grid; grid-template-columns: 61px minmax(0,1fr); align-items: center; gap: .6rem; border: 1px solid var(--line); background: white; padding: .45rem; border-radius: .55rem; }
.style-row img { width: 61px; aspect-ratio: 1; object-fit: contain; }
.style-row a, .guide-list a { font-weight: 760; }
.style-row small { display: block; color: var(--muted); }
.guide-list li { background: #e9efff; border-radius: .65rem; padding: .75rem; }
.guide-list p { margin: .2rem 0 0; }
.article { min-height: 62vh; padding-block: 1.55rem 3rem; }
.article h1 { font-size: clamp(2rem, 5vw, 4rem); overflow-wrap: anywhere; }
.crumb { margin-bottom: 1.15rem; }
.detail { display: grid; grid-template-columns: 1fr 1.1fr; align-items: start; gap: clamp(1.2rem, 4vw, 3rem); }
.detail dl { display: grid; grid-template-columns: minmax(6rem,1fr) minmax(0,2fr); gap: .35rem .65rem; }
dt { font-weight: 740; }
dd { margin: 0; }
.product-photo { border: 1px solid var(--line); border-radius: .7rem; background: white; }
.product-photo img { max-height: 490px; object-fit: contain; margin-inline: auto; }
.prose { max-width: 750px; margin-top: 1.6rem; }
.prose section { border-top: 1px solid var(--line); padding-top: 1rem; margin-top: 1.25rem; }
.prose h2 { font-size: 1.5rem; }
.table-scroll { overflow: auto; border: 1px solid var(--line); border-radius: .55rem; }
table { width: 100%; min-width: 38rem; border-collapse: collapse; background: white; }
td, th { padding: .65rem .75rem; text-align: left; vertical-align: top; }
thead { background: #e3ebff; }
tbody tr + tr { border-top: 1px solid var(--line); }
.footer { align-items: flex-start; border-top: 1px solid var(--line); border-bottom: 0; }
.footer p { margin: .4rem 0 0; color: var(--muted); font-size: .86rem; }
@media (max-width: 760px) {
  .wrap { width: calc(100% - 2rem); }
  .hero, .detail, .style-row { grid-template-columns: 1fr; }
  .hero { gap: 1rem; }
  .footer { flex-direction: column; }
}
@media (max-width: 460px) {
  .style-row ul, .guide-list { grid-template-columns: 1fr; }
}