:root {
  --brand: #1f9d8b;
  --brand-dark: #157f70;
  --brand-light: #e3f6f2;
  --ink: #16241f;
  --muted: #5c6b66;
  --bg: #f6faf9;
  --card: #ffffff;
  --border: #e1e9e7;
  --radius: 16px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, system-ui, sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
code {
  background: var(--brand-light); color: var(--brand-dark);
  padding: 1px 6px; border-radius: 5px; font-size: .9em;
}
.btn {
  display: inline-block; border-radius: 10px; padding: 12px 22px; font-weight: 700;
  font-size: 15px; text-decoration: none; cursor: pointer; border: 1px solid transparent;
  transition: filter .15s ease, transform .05s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: #fff; color: var(--brand-dark); }
.btn-primary:hover { filter: brightness(.97); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn-ghost:hover { background: rgba(255,255,255,.12); }

/* ===== ヒーロー ===== */
.hero {
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
  color: #fff; padding: 56px 20px 64px;
}
.hero-inner {
  max-width: 1040px; margin: 0 auto;
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center;
}
.badge-mv3 {
  display: inline-block; background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.3);
  padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; margin-bottom: 14px;
}
.hero h1 { font-size: 34px; line-height: 1.25; margin-bottom: 14px; }
.hero h1 .logo { font-size: 32px; }
.lead { font-size: 16px; opacity: .95; margin-bottom: 24px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== ポップアップ・モック ===== */
.mock {
  width: 320px; margin: 0 auto; background: #fff; color: var(--ink);
  border-radius: 16px; box-shadow: 0 24px 60px rgba(0,0,0,.28); overflow: hidden;
  border: 1px solid rgba(0,0,0,.06);
}
.mock-head {
  display: flex; align-items: center; gap: 8px; padding: 11px 13px;
  background: linear-gradient(135deg, var(--brand-dark), var(--brand)); color: #fff; font-size: 14px;
}
.mock-head strong { flex: 1; font-size: 13.5px; }
.mock-gear { opacity: .9; }
.mock-tabs { display: flex; border-bottom: 1px solid var(--border); }
.mock-tabs span {
  flex: 1; text-align: center; padding: 10px 4px; font-size: 12.5px; font-weight: 600; color: var(--muted);
  border-bottom: 2px solid transparent;
}
.mock-tabs span.on { color: var(--brand-dark); border-bottom-color: var(--brand); }
.mock-body { padding: 12px; }
.mock-search {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 10px; font-size: 12.5px; color: var(--muted); margin-bottom: 10px;
}
.mock-item {
  background: var(--bg); border: 1px solid var(--border); border-radius: 9px; padding: 9px 10px; margin-bottom: 8px;
}
.mi-label { font-weight: 700; font-size: 12.5px; }
.mi-body { color: var(--muted); font-size: 11.5px; margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mi-row { display: flex; gap: 6px; margin-top: 7px; }
.mi-btn {
  font-size: 11px; font-weight: 600; padding: 4px 11px; border-radius: 7px;
  background: #fff; border: 1px solid var(--border); color: var(--ink);
}
.mi-btn.on { background: var(--brand); color: #fff; border-color: var(--brand); }

/* ===== セクション共通 ===== */
main { max-width: 1040px; margin: 0 auto; padding: 56px 20px; }
main h2 { font-size: 24px; text-align: center; margin-bottom: 8px; }
section { margin-bottom: 64px; }

/* ===== 機能 ===== */
.feature-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 28px;
}
.feature {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: 0 1px 3px rgba(22,36,31,.05);
}
.f-icon {
  width: 48px; height: 48px; border-radius: 12px; background: var(--brand-light);
  display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 12px;
}
.feature h3 { font-size: 17px; margin-bottom: 6px; }
.feature p { font-size: 14px; color: var(--muted); }
.feature strong { color: var(--ink); }

/* ===== インストール ===== */
.install { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 28px; }
.install h2 { text-align: left; }
.steps { margin: 18px 0 14px; padding-left: 22px; }
.steps li { margin-bottom: 12px; font-size: 14.5px; }
.note { font-size: 13px; color: var(--muted); }

/* ===== 技術 ===== */
.tech h2 { text-align: left; }
.tech-list { margin-top: 16px; padding-left: 22px; }
.tech-list li { margin-bottom: 8px; font-size: 14.5px; color: var(--muted); }
.tech-list strong { color: var(--ink); }

/* ===== フッター ===== */
.site-foot { border-top: 1px solid var(--border); padding: 28px 20px; text-align: center; color: var(--muted); font-size: 13px; }
.site-foot a { color: var(--brand-dark); }

/* ===== レスポンシブ ===== */
@media (max-width: 820px) {
  .hero-inner { grid-template-columns: 1fr; }
  .mock { margin-top: 8px; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
}