:root {
  color-scheme: light;
  --paper: #f7f3eb;
  --paper-strong: #fffdf8;
  --ink: #173f3b;
  --body: #3e5652;
  --muted: #71827f;
  --teal: #14766e;
  --teal-dark: #0b5751;
  --mint: #d9ebe5;
  --coral: #d95746;
  --peach: #f3c7b8;
  --line: rgba(23, 78, 72, .14);
  --shadow: 0 24px 70px rgba(28, 73, 68, .12);
  --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--body);
  background:
    radial-gradient(circle at 8% 4%, rgba(217, 87, 70, .11), transparent 28rem),
    radial-gradient(circle at 92% 22%, rgba(20, 118, 110, .12), transparent 30rem),
    linear-gradient(180deg, #fbf8f1, var(--paper));
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "あ";
  position: fixed;
  right: -3vw;
  top: 9vh;
  z-index: -1;
  color: rgba(20, 118, 110, .035);
  font-size: clamp(18rem, 38vw, 42rem);
  font-weight: 900;
  line-height: .8;
  pointer-events: none;
}

a { color: inherit; }
img { max-width: 100%; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 100; padding: 10px 14px; border-radius: 12px; background: var(--ink); color: white; }
.skip-link:focus { top: 12px; }
.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 14px;
  z-index: 20;
  width: min(1180px, calc(100% - 40px));
  margin: 14px auto 0;
  border: 1px solid rgba(255,255,255,.8);
  border-radius: 24px;
  background: rgba(255, 253, 248, .82);
  box-shadow: 0 14px 48px rgba(35, 76, 70, .1);
  backdrop-filter: blur(22px) saturate(140%);
}
.nav { display: flex; min-height: 68px; align-items: center; justify-content: space-between; gap: 24px; padding: 8px 14px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); font-weight: 900; letter-spacing: -.02em; text-decoration: none; }
.brand img { width: 46px; height: 46px; border-radius: 13px; box-shadow: 0 8px 24px rgba(21, 75, 69, .14); }
.brand span small { display: block; color: var(--coral); font-size: .58rem; font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a { display: inline-flex; min-height: 44px; align-items: center; padding: 8px 13px; border-radius: 13px; color: var(--muted); font-weight: 750; text-decoration: none; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-links a[aria-current="page"] { color: var(--teal-dark); background: var(--mint); outline: none; }
.menu-button { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 13px; color: var(--ink); background: white; font-size: 1.1rem; }

.hero { display: grid; min-height: 760px; grid-template-columns: minmax(0, 1fr) minmax(330px, 430px); align-items: center; gap: clamp(44px, 8vw, 110px); padding: 78px 0 72px; }
.eyebrow { margin: 0 0 17px; color: var(--coral); font-size: .79rem; font-weight: 900; letter-spacing: .18em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; color: var(--ink); line-height: 1.06; text-wrap: balance; }
h1 { max-width: 760px; font-size: clamp(3.6rem, 7vw, 6.2rem); letter-spacing: -.07em; font-weight: 920; }
h1 .accent, .accent-text { color: var(--teal); }
h2 { font-size: clamp(2.3rem, 5vw, 4.3rem); letter-spacing: -.05em; }
h3 { font-size: 1.26rem; letter-spacing: -.025em; }
.japanese-mark { display: inline-flex; margin-bottom: 18px; padding: 7px 12px; border: 1px solid rgba(217,87,70,.18); border-radius: 999px; background: rgba(255,255,255,.64); color: var(--coral); font-weight: 850; letter-spacing: .08em; }
.lead { max-width: 690px; margin: 24px 0 0; color: var(--body); font-size: clamp(1.08rem, 2vw, 1.34rem); font-weight: 550; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 31px; }
.button { display: inline-flex; min-height: 54px; align-items: center; justify-content: center; gap: 9px; padding: 13px 20px; border: 1px solid transparent; border-radius: 17px; font-weight: 850; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: white; background: var(--teal); box-shadow: 0 15px 36px rgba(20,118,110,.24); }
.button.secondary { border-color: var(--line); color: var(--teal-dark); background: rgba(255,255,255,.78); }
.availability { margin-top: 17px; color: var(--muted); font-size: .9rem; }

.phone-stage { position: relative; width: min(100%, 385px); margin-inline: auto; }
.phone-stage::before { content: ""; position: absolute; inset: 10% -18% 3%; z-index: -1; border-radius: 50%; background: conic-gradient(from 180deg, rgba(20,118,110,.24), rgba(217,87,70,.21), rgba(130,190,173,.26), rgba(20,118,110,.24)); filter: blur(50px); }
.phone { position: relative; padding: 9px; border: 1px solid rgba(20, 65, 61, .2); border-radius: 47px; background: linear-gradient(145deg, #d8d4cb, #faf8f1 45%, #9d9a94); box-shadow: var(--shadow); transform: rotateY(-3deg) rotateX(1deg); }
.phone-screen { position: relative; aspect-ratio: 1242 / 2688; overflow: hidden; border-radius: 38px; background: #f5f1e8; }
.phone-screen img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transform: scale(1.02); transition: opacity .65s ease, transform .9s ease; }
.phone-screen img.active { opacity: 1; transform: scale(1); }
.gallery-controls { display: flex; align-items: center; justify-content: center; gap: 11px; margin-top: 22px; }
.gallery-arrow { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; color: var(--teal-dark); background: white; cursor: pointer; }
.gallery-dots { display: flex; gap: 6px; }
.gallery-dot { width: 7px; height: 7px; padding: 0; border: 0; border-radius: 99px; background: rgba(20,118,110,.22); cursor: pointer; transition: width .25s, background .25s; }
.gallery-dot.active { width: 24px; background: var(--coral); }

section { padding: 80px 0; scroll-margin-top: 100px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 32px; }
.section-head p { max-width: 560px; margin: 0; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.card { min-height: 240px; padding: 29px; border: 1px solid rgba(255,255,255,.9); border-radius: var(--radius); background: rgba(255,253,248,.78); box-shadow: 0 18px 50px rgba(27,78,72,.08); backdrop-filter: blur(16px); }
.card h3 { margin: 18px 0 10px; }
.card p { margin: 0; color: var(--muted); }
.symbol { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 16px; background: var(--mint); color: var(--teal); font-size: 1.35rem; font-weight: 900; }
.story-band { display: grid; grid-template-columns: 1.08fr .92fr; gap: 18px; align-items: stretch; }
.story-copy { padding: clamp(30px, 6vw, 64px); border: 1px solid rgba(20,118,110,.14); border-radius: 34px; background: linear-gradient(125deg, rgba(217,235,229,.92), rgba(255,245,235,.86)); }
.story-copy p { max-width: 590px; color: var(--body); }
.chapter-number { display: block; margin: 22px 0 5px; color: var(--coral); font-size: clamp(4rem, 11vw, 8rem); line-height: .9; font-weight: 920; letter-spacing: -.07em; }
.story-image { min-height: 480px; border: 1px solid var(--line); border-radius: 34px; background: url('../screenshots/story.png') center 27% / cover; box-shadow: var(--shadow); }
.privacy-strip { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 22px; padding: 28px; border: 1px solid rgba(20,118,110,.18); border-radius: 24px; background: rgba(217,235,229,.64); }
.privacy-strip p { margin: 4px 0 0; color: var(--body); }

.page-hero { max-width: 900px; padding: 105px 0 52px; }
.page-hero h1 { font-size: clamp(3.1rem, 8vw, 6.5rem); }
.support-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.support-card { min-height: 0; }
.support-card a { color: var(--teal); font-weight: 750; }
.steps { margin: 16px 0 0; padding-left: 20px; color: var(--muted); }
.steps li + li { margin-top: 8px; }
.contact-panel { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 30px; margin: 36px 0 90px; padding: clamp(28px, 5vw, 52px); border: 1px solid rgba(217,87,70,.19); border-radius: 30px; background: linear-gradient(115deg, rgba(255,239,230,.94), rgba(217,235,229,.88)); }
.contact-panel p { margin: 10px 0 0; color: var(--body); }
.legal { max-width: 930px; padding-bottom: 100px; }
.legal article { padding: clamp(26px, 5vw, 54px); border: 1px solid rgba(255,255,255,.92); border-radius: 30px; background: rgba(255,253,248,.86); box-shadow: var(--shadow); }
.legal h2 { margin: 42px 0 13px; font-size: clamp(1.45rem, 3vw, 2rem); letter-spacing: -.025em; }
.legal p, .legal li { color: #536965; }
.legal li + li { margin-top: 8px; }
.legal a { color: var(--teal); font-weight: 650; }
.updated { display: inline-flex; margin: 0 0 24px; padding: 7px 11px; border-radius: 999px; background: var(--mint); color: var(--teal-dark); font-size: .86rem; font-weight: 700; }
code { padding: .15em .4em; border-radius: .4em; background: #eef2ef; }

footer { border-top: 1px solid var(--line); background: rgba(237,240,233,.64); }
.footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: end; padding: 42px 0 52px; }
.footer-brand { display: flex; align-items: center; gap: 12px; color: var(--ink); font-weight: 900; }
.footer-brand img { width: 42px; border-radius: 12px; }
.footer-inner p { margin: 10px 0 0; color: var(--muted); font-size: .9rem; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 16px; }
.footer-links a { color: var(--muted); font-size: .9rem; text-decoration: none; }
.footer-links a:hover { color: var(--teal); }

@media (max-width: 900px) {
  .hero, .story-band { grid-template-columns: 1fr; }
  .hero { text-align: center; padding-top: 72px; }
  .hero .lead { margin-inline: auto; }
  .hero-actions { justify-content: center; }
  .phone-stage { max-width: 350px; }
  .feature-grid { grid-template-columns: 1fr; }
  .card { min-height: 0; }
  .story-image { min-height: 600px; background-position: center top; }
}
@media (max-width: 700px) {
  .shell, .site-header { width: min(100% - 24px, 1180px); }
  .site-header { top: 7px; margin-top: 7px; }
  .menu-button { display: block; }
  .nav-links { position: absolute; display: none; top: 74px; left: 0; right: 0; flex-direction: column; align-items: stretch; padding: 10px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,253,248,.98); box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .nav-links a { justify-content: center; }
  h1 { font-size: clamp(3.1rem, 17vw, 5rem); }
  section { padding: 61px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 14px; }
  .privacy-strip, .contact-panel, .footer-inner { grid-template-columns: 1fr; }
  .support-grid { grid-template-columns: 1fr; }
  .contact-panel .button { width: 100%; }
  .footer-links { justify-content: flex-start; }
  .story-image { min-height: 480px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}