/* blusco ∅ の紹介。本家の紹介ページ（../index.html）と同じ組み方で、各章を「Twitter 型」と「blusco ∅」の対で並べる */
/* 見出しの和文は源暎アンチック（おたもん、OFL）で、日本語版と英語版の字だけに絞ってある（fonts/）。本文の和文は Zen Kaku Gothic New、欧文は Jost（どちらも OFL） */
@font-face { font-family: "GenEi Antique"; src: url("fonts/geneiantique.woff2") format("woff2"); font-weight: 400 600; font-display: swap; }
:root {
  --paper: #FBF8F2;
  --ink: #1F1D1B;
  --muted: #77706A;
  --rule: #E6E0D5;
  --blusco: #026881;
  --band: #F2EEE6;
  --mock: #A39C93;    /* Twitter 型の図の線 */
  --mockfill: #ECE7DE;
  --sans: "Jost", "Zen Kaku Gothic New", "Hiragino Sans", system-ui, sans-serif;
  --display: "Jost", "GenEi Antique", "Hiragino Sans", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #161615; --ink: #ECE8E0; --muted: #9A958C; --rule: #2E2C29; --blusco: #7CC6D8; --band: #1D1C1A; --mock: #6F6A63; --mockfill: #26241F; color-scheme: dark; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-synthesis: none; margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 17px; line-height: 1.75; -webkit-font-smoothing: antialiased; }
a { color: var(--blusco); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--paper) 82%, transparent); backdrop-filter: saturate(1.6) blur(18px); -webkit-backdrop-filter: saturate(1.6) blur(18px); border-bottom: 1px solid var(--rule); }
.top div { max-width: 980px; margin: 0 auto; display: flex; align-items: center; gap: 18px; height: 48px; padding: 0 max(20px, env(safe-area-inset-right)) 0 max(20px, env(safe-area-inset-left)); font-size: 13px; }
.top b { font-weight: 500; font-size: 17px; letter-spacing: .01em; margin-right: auto; display: flex; align-items: center; gap: 8px; color: var(--ink); white-space: nowrap; }
.top b img { width: 22px; height: 22px; border-radius: 5px; }
.top a.home { color: var(--muted); white-space: nowrap; }
.pill { display: inline-block; background: var(--blusco); color: #fff; border-radius: 999px; padding: 4px 13px; font-size: 13px; font-weight: 500; white-space: nowrap; }
@media (prefers-color-scheme: dark) { .pill { color: #10181b; } }
.pill:hover { text-decoration: none; filter: brightness(1.08); }

section { padding: 112px max(20px, env(safe-area-inset-right)) 112px max(20px, env(safe-area-inset-left)); text-align: center; }
section.band { background: var(--band); }
.eyebrow { font-size: 15px; font-weight: 500; color: var(--blusco); margin: 0 0 18px; letter-spacing: .02em; font-variant-numeric: tabular-nums; }
h1, h2, h3 { font-family: var(--display); }
h1, h2 { font-weight: 500; letter-spacing: -.01em; line-height: 1.22; text-wrap: balance; margin: 0 auto; max-width: 15em; }
h1 { font-size: clamp(32px, 5.4vw, 58px); }
h2 { font-size: clamp(30px, 5vw, 52px); }
.sub { font-size: clamp(19px, 2.4vw, 24px); font-weight: 400; color: var(--ink); max-width: 30em; margin: 22px auto 0; text-wrap: balance; line-height: 1.6; }
.body { max-width: 34em; margin: 20px auto 0; color: var(--muted); font-size: 17px; text-wrap: pretty; text-align: left; }
.cta { margin-top: 34px; display: flex; gap: 26px; justify-content: center; align-items: center; flex-wrap: wrap; font-size: 17px; }
.cta .pill { font-size: 17px; padding: 11px 24px; }
.cap { font-size: 14px; color: var(--muted); margin: 16px auto 0; max-width: 30em; }

.hero { padding-top: 96px; }
.hero .icon { width: clamp(120px, 20vw, 168px); height: auto; display: block; margin: 0 auto 34px; border-radius: 22.5%; filter: drop-shadow(0 18px 30px rgba(2, 104, 129, .28)); }
.hero .model { display: block; font-size: 15px; color: var(--muted); margin-top: 14px; letter-spacing: .04em; }

/* 対の並び。左が Twitter 型、右が blusco ∅ */
.vs { max-width: 940px; margin: 64px auto 0; display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; text-align: left; }
.side h3 { margin: 0 0 6px; font-size: 13px; font-weight: 500; letter-spacing: .08em; color: var(--muted); font-family: var(--sans); }
.side.zero h3 { color: var(--blusco); }
.side p { margin: 0; font-size: 16px; line-height: 1.85; color: var(--muted); text-wrap: pretty; }
.side.zero p { color: var(--ink); }
.side figure { margin: 0 0 26px; }
.mock { display: block; width: min(250px, 72vw); height: auto; margin: 0 auto; color: var(--mock); }
.mock .f { fill: var(--mockfill); }
.mock .s { fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.mock .t { fill: currentColor; font: 500 11px var(--sans); }
.mock .b { fill: currentColor; }
.mock .z { stroke: var(--blusco); }
.mock .zf { fill: var(--blusco); }
.mock .zt { fill: var(--blusco); font: 500 11px var(--sans); }
/* iPhone の枠。撮った画面を入れる */
.phone { width: min(280px, 74vw); margin: 0 auto; border-radius: 44px; padding: 9px; background: #0d0d0d; box-shadow: 0 30px 70px rgba(0, 0, 0, .18), inset 0 0 0 1.5px #3a3a3a; }
.phone img { display: block; width: 100%; height: auto; border-radius: 36px; }

/* 数字の並び */
.nums { display: flex; justify-content: center; gap: 40px; margin-top: 30px; font-size: 14px; color: var(--muted); flex-wrap: wrap; }
.nums b { display: block; font-size: 30px; font-weight: 500; color: var(--ink); font-variant-numeric: tabular-nums; line-height: 1.2; }

/* 減らしたもの */
.rules { max-width: 980px; margin: 64px auto 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 44px 56px; text-align: left; }
.rule h3 { margin: 0; font-size: 23px; font-weight: 500; line-height: 1.35; }
.rule p { margin: 10px 0 0; color: var(--muted); font-size: 16px; line-height: 1.8; }

footer { border-top: 1px solid var(--rule); padding: 32px max(20px, env(safe-area-inset-right)) 48px max(20px, env(safe-area-inset-left)); font-size: 13px; color: var(--muted); }
footer div { max-width: 980px; margin: 0 auto; display: flex; gap: 8px 22px; flex-wrap: wrap; }
footer a { color: var(--muted); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media (max-width: 720px) {
  section { padding-top: 80px; padding-bottom: 80px; }
  .vs { grid-template-columns: 1fr; gap: 48px; }
  .top div { gap: 12px; }
}