:root {
  --bg: #f6c99a;
  --paper: #fffaf0;
  --ink: #4a2e1c;
  --muted: #8a6a52;
  --orange: #ee9150;
  --line: #4a2e1c;
}
* { box-sizing: border-box; }
html[data-lang="ja"] [lang="en"], html[data-lang="en"] [lang="ja"] { display: none; }
body {
  margin: 0;
  background: linear-gradient(#f2a87c, #f8dcaa) fixed;
  background-color: var(--bg);
  color: var(--ink);
  font: 16px/1.75 ui-rounded, "Hiragino Maru Gothic ProN", "SF Pro Rounded", system-ui, sans-serif;
}
a { color: #b4521c; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding-top: 18px; padding-bottom: 18px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 900; font-size: 1.15rem; }
.brand img { width: 40px; height: 40px; border-radius: 10px; border: 2.5px solid var(--line); }
.lang { display: flex; gap: 6px; }
.lang button {
  font: inherit; font-weight: 800; font-size: .85rem; padding: 4px 12px; border-radius: 999px;
  border: 2.5px solid var(--line); background: var(--paper); color: var(--ink); cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--orange); color: #fff; }
main {
  max-width: 760px; margin: 0 auto 32px; background: var(--paper); border: 3px solid var(--line);
  border-radius: 28px; padding: 28px 24px;
}
@media (max-width: 600px) { main { margin: 0 16px 24px; padding: 22px 18px; } }
h1 { font-size: 1.9rem; line-height: 1.3; margin: 0 0 4px; font-weight: 900; }
h2 { font-size: 1.2rem; margin: 28px 0 6px; font-weight: 900; }
.date { color: var(--muted); margin-top: 0; font-weight: 700; }
footer { text-align: center; padding: 8px 16px 40px; color: var(--muted); font-size: .9rem; }
footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; margin-bottom: 8px; }
footer a { color: var(--ink); font-weight: 800; }

/* Landing page */
main.landing { max-width: 1040px; background: none; border: 0; padding: 0 16px; margin: 0 auto 32px; }
.phone {
  width: 100%; max-width: 250px; height: auto; border-radius: 34px; border: 4px solid var(--line);
  box-shadow: 0 18px 40px rgba(74, 46, 28, .22); background: #fff;
}
.hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px; align-items: center; padding: 24px 0 48px; }
.hero-text h1 { font-size: clamp(2.4rem, 7vw, 3.6rem); line-height: 1.1; margin: 16px 0 4px; letter-spacing: -.01em; }
.hero-text h1 + p, .hero-text h1 + p + p { font-size: 1.35rem; font-weight: 900; color: var(--muted); margin: 0 0 14px; }
.hero-text p { font-size: 1.1rem; }
.hero-phone { justify-self: center; max-width: 290px; transform: rotate(3deg); }
.app-icon { width: 128px; height: 128px; border-radius: 28px; border: 3px solid var(--line); box-shadow: 0 8px 20px rgba(74, 46, 28, .2); }
.store {
  display: inline-block; margin-top: 10px; padding: 14px 26px; border-radius: 999px; background: var(--ink);
  color: #fff; font-weight: 900; text-decoration: none; box-shadow: 0 5px 0 #2b1a10;
}
.band { background: var(--paper); border: 3px solid var(--line); border-radius: 32px; padding: 32px 28px; margin-bottom: 28px; }
.band h2 { font-size: 1.8rem; text-align: center; margin: 0 0 24px; }
.band h3 { font-size: 1.2rem; margin: 6px 0 4px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.step { text-align: center; }
.step .phone { max-width: 220px; }
.num {
  display: inline-grid; place-items: center; width: 34px; height: 34px; margin-top: 16px; border-radius: 50%;
  background: var(--orange); color: #fff; font-weight: 900; border: 2.5px solid var(--line);
}
.features { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.features li { background: #fff; border: 2.5px solid var(--line); border-radius: 22px; padding: 18px; }
.features .icon { font-size: 2rem; }
.features p, .step p { margin: 0; color: var(--muted); font-weight: 600; }
.parents ul { max-width: 640px; margin: 0 auto; padding-left: 1.2em; }
.parents li { margin-bottom: 8px; font-weight: 600; }
.parents .links { text-align: center; margin-bottom: 0; }
.cta { text-align: center; padding: 16px 0 24px; }
.cta h2 { font-size: 1.7rem; margin: 14px 0 6px; }
.cta .app-icon { width: 96px; height: 96px; border-radius: 22px; }
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 8px; }
  .hero-phone { transform: none; max-width: 240px; }
  .steps, .features { grid-template-columns: 1fr; }
  .band { padding: 24px 18px; }
}