:root {
  color-scheme: light;
  --ground: #FFF8EE; --card: #FFFDF8; --sunken: #F6E8D8;
  --border: #EADFD3; --lip: #DCCBBA;
  --ink: #3B1D12; --muted: #8A6456; --outline: #A03820;
  --accent: #D7263D; --accent-lip: #9E1A2B; --on-accent: #FFFFFF;
  --sage: #B9D3A9; --gold: #FFD25A; --todo: #FFE9A8;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--ground); color: var(--ink);
  font-family: 'Nunito', ui-rounded, 'Hiragino Maru Gothic ProN', system-ui, sans-serif;
  font-size: 17px; line-height: 1.6; padding-inline: 20px;
}
.jp { font-family: 'Zen Maru Gothic', 'Hiragino Maru Gothic ProN', 'Noto Sans JP', sans-serif; }
a { color: var(--outline); font-weight: 700; text-underline-offset: 3px; }
a:focus-visible, .btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 8px; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1040px; margin: 0 auto; }
header.site {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding-block: 18px; max-width: 1040px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand img { width: 40px; height: 40px; border-radius: 12px; }
.brand span { font-weight: 900; font-size: 22px; letter-spacing: -0.01em; }
nav.site { display: flex; gap: 6px 18px; flex-wrap: wrap; }
nav.site a { color: var(--muted); text-decoration: none; font-weight: 800; font-size: 15px; }
nav.site a[aria-current="page"] { color: var(--accent); }
.card {
  background: var(--card); border: 2px solid var(--border); border-bottom-width: 5px; border-bottom-color: var(--lip);
  border-radius: 20px; padding: 22px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--accent); color: var(--on-accent); text-decoration: none;
  font-weight: 900; font-size: 15px; letter-spacing: 0.06em; text-transform: uppercase;
  border-radius: 16px; border-bottom: 5px solid var(--accent-lip); padding: 14px 22px;
}
.btn.secondary { background: var(--card); color: var(--ink); border: 2px solid var(--border); border-bottom: 5px solid var(--lip); }
.btn[aria-disabled="true"] { cursor: default; }
.eyebrow { font-weight: 900; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }

/* Landing */
.hero { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 28px; align-items: center; padding-block: 28px 40px; }
.hero h1 { font-size: clamp(36px, 6vw, 58px); line-height: 1.05; margin: 10px 0 14px; font-weight: 900; letter-spacing: -0.02em; text-wrap: balance; }
.hero h1 .sun { color: var(--accent); }
.hero p.lede { font-size: 19px; color: var(--muted); max-width: 34ch; margin: 0 0 22px; }
.hero .ctas { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero .note { font-size: 14px; color: var(--muted); }
.stage { position: relative; display: grid; place-items: center; }
.stage .sun-disc { position: absolute; width: 78%; aspect-ratio: 1; border-radius: 50%; background: var(--accent); opacity: 0.12; }
.stage img { position: relative; width: min(340px, 90%); }
.page-sample {
  position: absolute; right: 2%; bottom: 6%; background: var(--card); border: 2px solid var(--border);
  border-bottom: 5px solid var(--lip); border-radius: 16px; padding: 10px 14px; font-size: 15px; max-width: 220px;
}
.page-sample .word { font-weight: 800; border-bottom: 3px solid var(--accent); }
.page-sample rt { font-size: 10px; color: var(--muted); }
section { padding-block: 26px; }
section h2 { font-size: clamp(26px, 4vw, 34px); font-weight: 900; margin: 6px 0 16px; text-wrap: balance; letter-spacing: -0.01em; }
.how { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.how .card { display: grid; gap: 6px; align-content: start; }
.how img { width: 92px; }
.how h3 { margin: 4px 0 0; font-size: 20px; font-weight: 900; }
.how p { margin: 0; color: var(--muted); }
.flashcard { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: center; }
.flashcard .tile {
  background: var(--sage); border-radius: 22px; padding-bottom: 12px; width: 200px;
}
.flashcard .face {
  background: var(--card); border: 2px solid var(--border); border-radius: 22px; padding: 18px; text-align: center;
}
.flashcard .face .big { font-size: 44px; font-weight: 700; line-height: 1.2; }
.flashcard .face .rd { color: var(--muted); }
.flashcard .face .mn { font-weight: 800; }
.cast { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cast .card { text-align: center; display: grid; gap: 4px; justify-items: center; }
.cast img { width: 110px; }
.cast h3 { margin: 4px 0 0; font-size: 20px; font-weight: 900; }
.cast p { margin: 0; color: var(--muted); font-size: 15px; }
.trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.trust .card h3 { margin: 0 0 4px; font-size: 18px; font-weight: 900; }
.trust .card p { margin: 0; color: var(--muted); font-size: 15px; }
.cta-band { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; background: var(--accent); color: var(--on-accent); border-radius: 22px; border-bottom: 6px solid var(--accent-lip); padding: 22px 26px; }
.cta-band h2 { color: var(--on-accent); margin: 0; }
.cta-band .btn { background: var(--card); color: var(--accent); border-bottom-color: var(--lip); }

/* Documents */
.doc { max-width: 760px; margin: 0 auto; padding-block: 12px 40px; }
.doc h1 { font-size: clamp(32px, 5vw, 44px); font-weight: 900; margin: 8px 0 6px; letter-spacing: -0.02em; }
.doc .meta { color: var(--muted); margin: 0 0 22px; }
.doc .body { background: var(--card); border: 2px solid var(--border); border-bottom: 5px solid var(--lip); border-radius: 20px; padding: 8px 26px 18px; }
.doc .body h2 { font-size: 22px; font-weight: 900; margin: 26px 0 6px; }
.doc .body h3 { font-size: 18px; font-weight: 800; margin: 18px 0 4px; }
.doc .body p, .doc .body li { max-width: 68ch; }
.doc .body ul { padding-left: 1.2em; }
.doc .body li { margin: 4px 0; }
.table { overflow-x: auto; margin: 10px 0; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 2px solid var(--border); }
th { font-weight: 900; }
code { background: var(--sunken); border-radius: 6px; padding: 1px 6px; font-size: 0.92em; }
mark.todo { background: var(--todo); color: var(--ink); border-radius: 6px; padding: 0 4px; font-weight: 800; }
.steps { display: grid; gap: 12px; counter-reset: step; padding: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: 40px 1fr; gap: 12px; align-items: start; }
.steps li::before {
  counter-increment: step; content: counter(step); display: grid; place-items: center; width: 36px; height: 36px;
  border-radius: 50%; background: var(--accent); color: var(--on-accent); font-weight: 900; border-bottom: 4px solid var(--accent-lip);
}
.faq { display: grid; gap: 12px; }
.faq details { background: var(--card); border: 2px solid var(--border); border-bottom: 5px solid var(--lip); border-radius: 16px; padding: 14px 18px; }
.faq summary { font-weight: 900; cursor: pointer; }
.faq p { margin: 8px 0 0; color: var(--muted); }

footer.site { max-width: 1040px; margin: 30px auto 0; padding-block: 22px 34px; border-top: 2px solid var(--border); display: flex; gap: 10px 22px; flex-wrap: wrap; align-items: center; color: var(--muted); font-size: 14px; }
footer.site a { color: var(--muted); }
footer.site .spacer { flex: 1; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; }
  .stage { order: -1; }
  .how, .cast, .trust { grid-template-columns: 1fr; }
  .flashcard { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .doc .body { padding: 6px 18px 14px; }
}
@media (prefers-reduced-motion: no-preference) {
  .stage img { animation: bob 5s ease-in-out infinite; }
  @keyframes bob { 50% { transform: translateY(-6px); } }
}