:root {
  --accent: #c8372d;
  --text: #16171a;
  --muted: #5d6068;
  --bg: #ffffff;
  --card: #f4f4f6;
  --border: #e3e3e8;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #e5534b;
    --text: #f2f2f4;
    --muted: #a2a5ad;
    --bg: #121316;
    --card: #1c1d21;
    --border: #2c2d33;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
}

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

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

nav { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
nav .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); text-decoration: none; }
img { max-width: 100%; height: auto; }
nav .brand img { width: 32px; height: 32px; border-radius: 8px; }
nav .lang { font-size: 15px; }

header.hero { display: grid; gap: 32px; align-items: center; padding: 24px 0 48px; }
.hero h1 { font-size: clamp(34px, 6vw, 54px); line-height: 1.1; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero .lead { font-size: 19px; color: var(--muted); margin: 0 0 20px; }
.hero .price { margin: 0 0 24px; font-weight: 600; }
.hero .shot { justify-self: center; width: min(320px, 80vw); border-radius: 28px; box-shadow: 0 12px 40px rgb(0 0 0 / 0.18); }

.cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  padding: 14px 24px;
  border-radius: 14px;
}
.cta-note { display: block; margin-top: 10px; font-size: 14px; color: var(--muted); }

section { padding: 40px 0; border-top: 1px solid var(--border); }
section h2 { font-size: 28px; margin: 0 0 16px; }

.features { display: grid; gap: 16px; }
.features div { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 20px; }
.features h3 { margin: 0 0 6px; font-size: 18px; }
.features p { margin: 0; color: var(--muted); }

.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.gallery img { width: 100%; border-radius: 18px; }

.faq dt { font-weight: 600; margin-top: 16px; }
.faq dd { margin: 4px 0 0; color: var(--muted); }

footer { padding: 32px 0 48px; border-top: 1px solid var(--border); font-size: 14px; color: var(--muted); }
footer p { margin: 6px 0; }

article { max-width: 720px; padding-bottom: 48px; }
article h1 { font-size: 34px; margin: 8px 0 8px; }
article h2 { font-size: 22px; margin: 32px 0 8px; }
article .updated { color: var(--muted); margin: 0 0 24px; }
article hr { border: 0; border-top: 1px solid var(--border); margin: 48px 0; }

@media (min-width: 760px) {
  header.hero { grid-template-columns: 1.2fr 1fr; padding: 48px 0 64px; }
  .features { grid-template-columns: repeat(3, 1fr); }
}

section.plain { border: 0; padding: 0; }