:root {
  --bg: #0f0f14;
  --panel: #17171f;
  --text: #e8e8ea;
  --muted: #a0a0aa;
  --accent: #7c9cff;
  --border: #2a2a35;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.8;
}
a { color: var(--accent); }
.container { max-width: 760px; margin: 0 auto; padding: 32px 20px 80px; }
header.site {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 20px; border-bottom: 1px solid var(--border);
}
header.site .logo { font-weight: 700; font-size: 20px; letter-spacing: .02em; }
header.site nav { margin-left: auto; display: flex; gap: 18px; font-size: 14px; }
header.site nav a { color: var(--muted); text-decoration: none; }
header.site nav a:hover { color: var(--text); }
h1 { font-size: 28px; margin: 8px 0 4px; }
h2 { font-size: 19px; margin: 34px 0 8px; padding-top: 8px; border-top: 1px solid var(--border); }
h2:first-of-type { border-top: none; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: 14px; }
.lead { color: var(--muted); }
ul { padding-left: 1.2em; }
.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 20px 22px; margin: 18px 0;
}
.hero { text-align: center; padding: 56px 0 24px; }
.hero h1 { font-size: 40px; }
.btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 10px;
  background: var(--accent); color: #0b0b10; text-decoration: none; font-weight: 600;
}
.btn.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; padding: 24px 20px; text-align: center; }
footer a { color: var(--muted); }
code { background: #22222c; padding: 2px 6px; border-radius: 6px; font-size: 13px; }

/* Landing */
.app-icon { width: 26px; height: 26px; border-radius: 7px; vertical-align: middle; margin-right: 6px; }
header.site .logo { display: flex; align-items: center; }
.hero-banner { width: 100%; padding: 24px 16px 4px; text-align: center; }
.hero-banner img {
  display: block;
  margin: 0 auto;                 /* 中央寄せ */
  width: 100%;
  max-width: 960px;               /* 大画面でも大きすぎない */
  max-height: 70vh;               /* 画面の高さにも収める */
  height: auto;
  object-fit: contain;
  border-radius: 16px;
  border: 1px solid var(--border);
}
.tagline { text-align: center; color: var(--muted); margin: 4px 0 0; }
.shots {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 28px 0;
}
.shots figure { margin: 0; }
.shots img {
  width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--border); display: block;
}
.shots figcaption { color: var(--muted); font-size: 13px; text-align: center; margin-top: 8px; }
@media (max-width: 640px) {
  .shots { grid-template-columns: 1fr; max-width: 340px; margin-left: auto; margin-right: auto; }
}