/* Base */
:root {
  --bg1: #0E0F12;
  --bg2: #19141A;
  --bg3: #221821;
  --bg4: #2C1C28;
  --bg5: #402330;
  --card: rgba(22,24,29,0.85);
  --surface: rgba(28,31,37,0.85);
  --text: #F5F6F7;
  --subtext: #A7ABB3;
  --pink: #F6C6D0;
  --pink-soft: #FADAE2;
  --mint: #BFE6E2;
  --border: #22252B;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Noto Sans JP, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: #0E0F12;
}

.bg-gradient {
  position: fixed; inset: 0; z-index: -1;
  background: linear-gradient(135deg, var(--bg1), var(--bg2), var(--bg3), var(--bg4), var(--bg5));
}

.container {
  max-width: 1080px; margin: 0 auto; padding: 0 20px;
}

/* Header */
.site-header { position: sticky; top: 0; backdrop-filter: blur(8px); background: rgba(0,0,0,0.25); border-bottom: 1px solid var(--border); z-index: 20; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .3px; }
.brand-logo { width: 28px; height: 28px; border-radius: 6px; object-fit: cover; }
.brand-name { color: var(--pink); font-size: 18px; }

.nav { display: flex; align-items: center; gap: 18px; }
.nav a { color: var(--subtext); text-decoration: none; font-weight: 600; }
.nav a:hover { color: var(--text); }
.nav-cta { color: #1C1F25; background: var(--pink); padding: 8px 14px; border-radius: 10px; }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: rgba(0,0,0,0.2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { font-size: 28px; margin: 0 0 24px; }
.section p { color: var(--subtext); }

/* Hero */
.hero {
  position: relative;
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--border);
}
.hero-inner { display: flex; flex-direction: column; gap: 20px; align-items: center; }
.hero-top-image { width: 100%; max-width: 1080px; border-radius: 18px; overflow: hidden; border: 1px solid var(--border); box-shadow: 0 10px 40px rgba(0,0,0,.35); }
.hero-top-image img { display: block; width: 100%; height: auto; object-fit: cover; }
.hero-copy { max-width: 780px; text-align: center; }
.hero-copy h1 { font-size: 40px; line-height: 1.2; margin: 0 0 12px; }
.hero-copy .accent { color: var(--pink); }
.hero-copy p { font-size: 16px; color: var(--subtext); margin: 0 0 20px; }
.store-buttons { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 16px; border-radius: 12px; font-weight: 700; text-decoration: none; }
.btn.primary { background: var(--pink); color: #1C1F25; }
.btn.ghost { border: 1px solid var(--border); color: var(--text); background: transparent; }
.btn:hover { transform: translateY(-1px); transition: transform 120ms ease; }
.note { font-size: 12px; color: var(--subtext); margin-top: 8px; }

.hero-visual { display: none; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 18px; }
.card .ic { font-size: 20px; margin-bottom: 8px; }
.card h3 { margin: 8px 0; font-size: 18px; }
.card p { margin: 0; color: var(--subtext); }

/* Safety */
.grid-2 { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 18px; align-items: start; }
.safety-list { display: grid; gap: 12px; }
.safety-item { display: grid; grid-template-columns: 36px 1fr; gap: 12px; align-items: start; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 12px; }
.si-ic { width: 36px; height: 36px; display: grid; place-items: center; background: rgba(255,255,255,0.06); border-radius: 10px; font-size: 18px; }
.safety-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 18px; }
.lead { color: var(--pink); font-weight: 800; margin: 0 0 8px; }
.tick { margin: 0; padding-left: 18px; color: var(--subtext); }
.tick li { margin: 6px 0; }

/* How */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
.steps li { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 16px; display: flex; align-items: center; gap: 12px; }
.steps .num { width: 28px; height: 28px; display: grid; place-items: center; background: var(--pink); color: #1C1F25; font-weight: 900; border-radius: 50%; }

/* FAQ */
.faq { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; margin-bottom: 8px; }
.faq > summary { cursor: pointer; font-weight: 700; }
.faq > p { margin: 8px 0 0; color: var(--subtext); }

/* CTA */
.cta { text-align: center; }
.cta-inner { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 28px; }
.cta h2 { margin: 0 0 8px; font-size: 28px; }
.cta p { margin: 0 0 16px; color: var(--subtext); }

/* Footer */
.site-footer { padding: 28px 0; border-top: 1px solid var(--border); background: rgba(0,0,0,0.25); backdrop-filter: blur(8px); }
.footer-inner { display: grid; grid-template-columns: 1fr auto auto; gap: 12px; align-items: center; }
.brand.mini .brand-logo { width: 22px; height: 22px; }
.links { display: flex; gap: 14px; }
.links a { color: var(--subtext); text-decoration: none; }
.links a:hover { color: var(--text); }
.copy { color: var(--subtext); font-size: 12px; text-align: right; }

/* Responsive */
@media (max-width: 960px) {
  .hero { padding: 48px 0 48px; }
  .hero-inner { align-items: center; text-align: center; }
  .hero-copy { align-items: center; }
  .grid-2 { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
  .copy { text-align: center; }
}
@media (max-width: 560px) {
  .section { padding: 40px 0; }
  .hero-copy h1 { font-size: 30px; }
  .nav { display: none; }
}