:root {
  --accent: #4b5aa6;
  --accent-soft: #eef0f8;
  --ink: #1c1e26;
  --ink-sub: #6b7080;
  --line: #e6e7ee;
  --bg: #ffffff;
  --radius: 14px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  letter-spacing: 0.01em;
}

img { max-width: 100%; height: auto; display: block; }

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

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 18px;
}

/* header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.site-header .wrap {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
}

.brand-en {
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-sub);
}

/* hero */
.hero {
  background: linear-gradient(180deg, var(--accent-soft) 0%, #ffffff 100%);
  padding: 44px 0 36px;
  text-align: center;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: 26px;
  letter-spacing: 0.1em;
  font-weight: 700;
}

.hero .star {
  display: block;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.4em;
  margin-bottom: 14px;
}

.hero p {
  margin: 0;
  color: var(--ink-sub);
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* section */
.section-title {
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--ink-sub);
  font-weight: 600;
  margin: 34px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

/* product cards */
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-bottom: 40px;
}

@media (min-width: 620px) {
  .cards { grid-template-columns: 1fr 1fr; gap: 22px; }
}

.card {
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.card-thumb {
  aspect-ratio: 1 / 1;
  background: #f7f8fb;
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-body { padding: 14px 15px 16px; }

.card-name {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  margin: 0 0 6px;
}

.card-price {
  font-size: 15px;
  font-weight: 700;
  margin: 0;
}

.card-price .tax {
  font-size: 11px;
  font-weight: 400;
  color: var(--ink-sub);
  margin-left: 4px;
}

/* badges */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.badge-pre {
  background: var(--accent);
  color: #fff;
}

.badge-onsale {
  background: var(--accent-soft);
  color: var(--accent);
}

/* product detail */
.product { padding-bottom: 8px; }

.product-image {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 20px 0 18px;
  background: #f7f8fb;
  aspect-ratio: 1 / 1;
  width: min(100%, 52vh);
  margin-left: auto;
  margin-right: auto;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product h1 {
  font-size: 19px;
  line-height: 1.6;
  font-weight: 700;
  margin: 0 0 12px;
}

.price {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 14px;
  letter-spacing: 0.02em;
}

.price .tax {
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-sub);
  margin-left: 6px;
}

.btn {
  display: block;
  text-align: center;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 15px 16px;
  border-radius: 10px;
  margin: 16px 0 6px;
}

.btn-note {
  font-size: 11px;
  color: var(--ink-sub);
  text-align: center;
  margin: 0 0 26px;
}

.spec {
  margin: 0 0 26px;
  border-top: 1px solid var(--line);
}

.spec div {
  display: flex;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 11px 2px;
}

.spec dt {
  flex: 0 0 88px;
  font-size: 12px;
  color: var(--ink-sub);
  letter-spacing: 0.06em;
  margin: 0;
}

.spec dd {
  margin: 0;
  font-size: 14px;
  flex: 1;
}

.desc { margin-bottom: 34px; }

.desc h2 {
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--ink-sub);
  font-weight: 600;
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.desc p {
  margin: 0 0 12px;
  font-size: 14px;
}

.back {
  font-size: 13px;
  text-decoration: none;
  display: inline-block;
  margin: 18px 0 8px;
}

/* footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 34px;
  margin-top: 20px;
}

.site-footer p {
  margin: 0 0 6px;
  font-size: 11px;
  color: var(--ink-sub);
  line-height: 1.7;
}