:root {
  --bg: #0f1324;
  --panel: #171c33;
  --panel-2: #0b0e1b;
  --line: #2a3150;
  --ink: #f4f1ea;
  --muted: #b6b8c6;
  --dim: #858aa3;
  --accent: #f2b84b;
  --accent-ink: #1a1405;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--accent); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 28px; }

/* header */
header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { font-weight: 800; font-size: 26px; letter-spacing: -0.04em; color: var(--ink); text-decoration: none; }
.brand span { color: var(--accent); }
nav.top { display: flex; align-items: center; gap: 22px; font-size: 14px; }
nav.top a { color: var(--accent); text-decoration: none; }
nav.top a.lang { border: 1px solid var(--line); color: var(--ink); padding: 7px 12px; border-radius: 10px; }

/* common */
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; margin: 0 0 18px; }
section.block { padding: 88px 0; border-top: 1px solid var(--line); }
section.block h2 { font-size: 38px; line-height: 1.2; letter-spacing: -0.035em; margin: 0 0 14px; }
section.block p.sub { color: var(--muted); max-width: 620px; margin: 0 0 40px; }

.btn { display: inline-block; padding: 14px 22px; border-radius: 10px; font-weight: 700; font-size: 15px; text-decoration: none; border: 1px solid var(--line); color: var(--ink); background: transparent; cursor: default; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 26px 0 0; }
.chip { border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-size: 13px; color: var(--muted); }

/* hero */
.hero { padding: 72px 0 96px; }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.hero h1 { font-size: 68px; line-height: 1.08; letter-spacing: -0.045em; margin: 0 0 26px; font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--accent); display: block; }
.hero p.lead { color: var(--muted); font-size: 18px; margin: 0 0 30px; max-width: 540px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.note { color: var(--dim); font-size: 13px; margin: 16px 0 0; }

/* chat mock */
.phone { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: 22px; box-shadow: 0 30px 80px rgba(0,0,0,0.35); }
.phone .label { color: var(--accent); font-size: 11px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; margin: 0 0 16px; }
.msg { border-radius: 16px; padding: 12px 15px; font-size: 14.5px; line-height: 1.55; margin: 0 0 12px; max-width: 88%; }
.msg.me { background: var(--accent); color: var(--accent-ink); margin-left: auto; border-bottom-right-radius: 4px; }
.msg.joss { background: var(--panel-2); color: var(--ink); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.approve { background: var(--panel-2); border: 1px solid var(--accent); border-radius: 14px; padding: 14px 15px; font-size: 14px; }
.approve b { display: block; margin-bottom: 4px; }
.approve .row { display: flex; gap: 8px; margin-top: 12px; }
.approve .row span { flex: 1; text-align: center; padding: 8px; border-radius: 9px; font-weight: 700; font-size: 13px; border: 1px solid var(--line); }
.approve .row span.ok { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* cards */
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 26px; display: flex; flex-direction: column; }
.card h3 { margin: 0 0 8px; font-size: 19px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.prompt { background: var(--panel-2); border-left: 3px solid var(--accent); border-radius: 10px; padding: 16px 16px; margin: 18px 0 16px; font-size: 14.5px; color: var(--ink); line-height: 1.6; flex: 1; }
button.copy { align-self: flex-start; background: transparent; color: var(--ink); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; font-size: 14px; font-family: inherit; cursor: pointer; }
button.copy:hover { border-color: var(--accent); }

.steps { list-style: none; padding: 0; margin: 0; }
.steps li { display: grid; grid-template-columns: 34px 1fr; gap: 14px; margin: 0 0 20px; }
.steps li .n { width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--line); display: grid; place-items: center; font-size: 14px; color: var(--accent); }
.steps li b { display: block; }
.steps li span.t { color: var(--muted); font-size: 15px; }

.stores { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.store { border: 1px solid var(--line); border-radius: 12px; padding: 12px 18px; min-width: 190px; }
.store small { display: block; color: var(--dim); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }
.store b { font-size: 17px; }

/* documents */
main.doc { padding: 64px 0 96px; }
main.doc .wrap { max-width: 780px; }
main.doc h1 { font-size: 40px; letter-spacing: -0.035em; line-height: 1.2; margin: 0 0 8px; }
main.doc .updated { color: var(--dim); font-size: 14px; margin: 0 0 40px; }
main.doc h2 { font-size: 20px; margin: 40px 0 10px; letter-spacing: -0.01em; }
main.doc p, main.doc li { color: var(--muted); font-size: 15.5px; }
main.doc strong { color: var(--ink); }
main.doc ul { padding-left: 20px; }
main.doc table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 8px 0; }
main.doc th, main.doc td { text-align: left; border-bottom: 1px solid var(--line); padding: 12px 8px; vertical-align: top; }
main.doc th { width: 34%; color: var(--ink); font-weight: 600; }
main.doc td { color: var(--muted); }

/* footer */
footer.site { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--dim); font-size: 13px; }
footer.site .links { display: flex; flex-wrap: wrap; gap: 18px; }
footer.site .links a { color: var(--muted); text-decoration: none; }
footer.site p { margin: 14px 0 0; }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
  .grid3, .grid2 { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .hero { padding: 44px 0 64px; }
  .hero h1 { font-size: 44px; }
  section.block { padding: 64px 0; }
  section.block h2 { font-size: 30px; }
  nav.top { gap: 14px; }
  nav.top a.hide-sm { display: none; }
  main.doc h1 { font-size: 32px; }
  main.doc th { width: 40%; }
}

/* Japanese headings: break at punctuation, not mid-word */
html[lang="ja"] h1, html[lang="ja"] h2, html[lang="ja"] h3 { word-break: keep-all; overflow-wrap: anywhere; }