:root{
  --paper:#fbfaf8; --stone:#ecebe7; --ink:#22201d; --muted:#55504a;
  --lemon:#fff143; --lemon-ink:#2a2307; --line:#dcd9d3;
  --f-display:"Shippori Mincho","Hiragino Mincho ProN","Yu Mincho",serif;
  --f-body:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic UI","Meiryo",sans-serif;
  color-scheme:light;
}
*{box-sizing:border-box}
html{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:15.5px;line-height:1.95;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:1040px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.narrow{max-width:700px}
.note-bar{background:var(--ink);color:var(--paper);font-size:13px;text-align:center;padding-block:6px}
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-block:10px}
.logo{display:block;line-height:0}.logo img{height:36px;width:auto}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:999px;padding:10px 18px;font-weight:700;font-size:14px;text-decoration:none;border:1px solid var(--ink);background:var(--paper);color:var(--ink);white-space:nowrap}
.btn.yellow{background:var(--lemon);border-color:var(--lemon);color:var(--lemon-ink)}
.btn:focus-visible{outline:3px solid var(--ink);outline-offset:2px}
.eyebrow{font-size:13px;letter-spacing:.2em;color:var(--muted);text-transform:uppercase;margin:0}
h1,h2,h3{font-family:var(--f-display);font-weight:700;text-wrap:balance;margin:0}

.cover{position:relative}
.cover img{width:100%;aspect-ratio:16/7;max-height:460px;object-fit:cover}
.cover .wrap{position:relative;margin-top:-64px}
.cover-card{background:var(--paper);padding:22px 22px 6px;max-width:560px}
.cover h1{font-size:clamp(28px,6vw,44px);line-height:1.3;margin-top:4px}

.chapter{padding-block:44px;border-top:1px solid var(--line)}
.chapter:first-of-type{border-top:0}
.num{font-family:var(--f-display);font-size:13px;color:var(--muted);letter-spacing:.15em}
.chapter h2{font-size:clamp(22px,4.8vw,30px);line-height:1.45;margin:6px 0 14px}
.chapter p{margin:0 0 14px}
.facts{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:8px}
.facts li{background:var(--stone);border-radius:10px;padding:12px 14px 12px 40px;position:relative;font-size:14.5px;line-height:1.7}
.facts li::before{content:"";position:absolute;left:14px;top:17px;width:12px;height:12px;border-radius:3px;background:var(--lemon)}
.facts b{display:block}
.honest{border-left:3px solid var(--ink);padding:4px 0 4px 16px;margin:18px 0 0;font-size:14.5px}
.end{background:var(--stone);padding-block:44px}
.end h2{font-size:clamp(22px,4.8vw,30px);line-height:1.45}
.end p{margin:12px 0 0}
.cta{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
.sign{margin-top:20px;font-family:var(--f-display);text-align:right}
footer{padding-block:28px;font-size:13px;color:var(--muted)}
.mock-tag{display:inline-block;background:var(--lemon);color:var(--lemon-ink);font-size:13px;font-weight:700;border-radius:4px;padding:1px 6px;margin-left:6px;vertical-align:middle}
@media (max-width:600px){ .cover .wrap{margin-top:-30px} .cover-card{padding:18px 16px 2px} }