:root {
  --bg: #0f1115;
  --surface: #1a1d24;
  --surface-raised: #242833;
  --separator: #262a33;
  --text: #f2f4f7;
  --text-secondary: #9aa3b2;
  --accent: #c6f432;
  --on-accent: #0f1115;
  --radius: 20px;
  --max: 1080px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(198, 244, 50, 0.08), transparent 60%) no-repeat, var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Segoe UI", Roboto, "Noto Sans JP", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  font-size: 18px;
}

.brand img { width: 36px; height: 36px; border-radius: 9px; }

.wordmark { font-weight: 900; letter-spacing: 0.18em; color: var(--accent); font-size: 15px; }

.lang {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  border: 1px solid var(--separator);
  border-radius: 999px;
  padding: 6px 14px;
}

.lang:hover { color: var(--text); border-color: var(--text-secondary); }

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
  padding-top: 40px;
  padding-bottom: 80px;
}

.eyebrow {
  display: block;
  color: var(--accent);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.01em;
  margin: 0 0 16px;
}

h1 {
  font-size: clamp(40px, 6.4vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  font-weight: 800;
}

h1 em { font-style: normal; color: var(--accent); }

h1, h2, h3 { text-wrap: balance; }

:lang(ja) { word-break: auto-phrase; }

.phrase { display: inline-block; }

.lead {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--text-secondary);
  margin: 0 0 32px;
  max-width: 34em;
}

.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; }

.badge img { height: 54px; width: auto; }

.cta-note { color: var(--text-secondary); font-size: 14px; margin: 0; }

.compat { color: var(--text-secondary); font-size: 14px; margin: 20px 0 0; }

.metric {
  font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Roboto Condensed", "Arial Narrow", sans-serif;
  font-stretch: condensed;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.stage-card {
  justify-self: center;
  width: min(100%, 400px);
  background: var(--surface);
  border-radius: 28px;
  padding: 20px;
  box-shadow: 0 30px 90px rgba(198, 244, 50, 0.10), 0 12px 32px rgba(0, 0, 0, 0.45);
}

.stage-status {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.stage-status span:first-child::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 8px;
  vertical-align: 1px;
}

.stage {
  background: var(--bg);
  border-radius: 18px;
  display: block;
  width: 100%;
  height: auto;
}

.stage-count {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
  margin: 12px 0 8px;
}

.stage-count b { font-size: 88px; line-height: 1; color: var(--text); }

.stage-count span { color: var(--text-secondary); font-size: 16px; }

.stage-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.stage-stats div {
  background: var(--surface-raised);
  border-radius: 12px;
  padding: 8px 6px;
  text-align: center;
}

.stage-stats dt { font-size: 12px; color: var(--text-secondary); }

.stage-stats dd { margin: 0; font-size: 24px; line-height: 1.2; }

.wave-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.wave { display: block; width: 100%; height: auto; background: var(--bg); border-radius: 12px; }

section { padding: 72px 0; border-top: 1px solid var(--separator); }

h2 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  font-weight: 800;
}

.section-lead { color: var(--text-secondary); font-size: 18px; margin: 0 0 40px; max-width: 40em; }

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  counter-reset: step;
}

.steps li {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px;
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 800;
  margin-bottom: 18px;
}

.steps h3, .features h3 { font-size: 20px; margin: 0 0 8px; }

.steps p, .features p { color: var(--text-secondary); margin: 0; }

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px;
}

.feature ul { margin: 14px 0 0; padding-left: 1.2em; color: var(--text-secondary); }

.feature li + li { margin-top: 6px; }

.feature li::marker { color: var(--accent); }

.gallery {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 16px;
  margin: 0 -20px;
  padding-left: 20px;
  padding-right: 20px;
}

.gallery figure { flex: 0 0 240px; margin: 0; scroll-snap-align: start; }

.gallery img { border-radius: 28px; border: 6px solid #2a2e37; }

.gallery figcaption { color: var(--text-secondary); font-size: 14px; margin-top: 12px; text-align: center; }

.privacy {
  background: var(--surface);
  border-radius: 28px;
  padding: 40px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: center;
}

.privacy svg { width: 64px; height: 64px; color: var(--accent); }

.privacy h2 { margin-bottom: 8px; }

.privacy p { color: var(--text-secondary); margin: 0; font-size: 18px; }

.faq details {
  background: var(--surface);
  border-radius: 16px;
  padding: 0 24px;
}

.faq details + details { margin-top: 12px; }

.faq summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 18px;
  padding: 20px 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after { content: "+"; color: var(--accent); font-size: 24px; line-height: 1; }

.faq details[open] summary::after { content: "−"; }

.faq details p { color: var(--text-secondary); margin: 0 0 20px; }

.closing { text-align: center; }

.closing img.icon { width: 96px; height: 96px; border-radius: 22px; margin: 0 auto 24px; }

.closing .cta { justify-content: center; }

footer {
  border-top: 1px solid var(--separator);
  padding: 40px 0 56px;
  color: var(--text-secondary);
  font-size: 14px;
}

footer nav { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-bottom: 16px; }

footer nav a { color: var(--text); text-decoration: none; }

footer nav a:hover { text-decoration: underline; }

footer p { margin: 6px 0 0; }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 16px; gap: 56px; }
  .steps, .features { grid-template-columns: 1fr; }
  .privacy { grid-template-columns: 1fr; padding: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}