:root{--bg:#f7f3ea;--paper:#fffdf8;--ink:#1d1b18;--muted:#6e675e;--line:#d8cfbf;--accent:#2f3a36;--brown:#7a5c38;--soft:#ece4d7;--max:1080px}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 18% 0%,rgba(122,92,56,.12),transparent 28rem),radial-gradient(circle at 90% 10%,rgba(47,58,54,.10),transparent 28rem),var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,'Hiragino Mincho ProN','Yu Mincho','Noto Serif JP',serif;line-height:1.9;letter-spacing:.015em}
a{color:inherit;text-underline-offset:.24em}.site-header{position:sticky;top:0;z-index:5;background:rgba(247,243,234,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.header-inner{max-width:var(--max);margin:auto;padding:14px 22px;display:flex;justify-content:space-between;gap:24px;align-items:center}.brand{text-decoration:none;line-height:1.2}.mark,.nav,.meta-list,.card p,.note,.site-footer{font-family:-apple-system,BlinkMacSystemFont,'Noto Sans JP',sans-serif}.mark{display:block;font-size:12px;color:var(--muted);letter-spacing:.18em}.name{font-size:18px;font-weight:650}.nav{display:flex;gap:18px;font-size:13px;color:var(--muted)}.nav a{text-decoration:none}
main{max-width:var(--max);margin:auto;padding:0 22px}.hero{min-height:72vh;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.72fr);gap:54px;align-items:center;padding:72px 0 56px}.kicker{font-family:-apple-system,BlinkMacSystemFont,'Noto Sans JP',sans-serif;color:var(--brown);font-size:13px;letter-spacing:.18em;text-transform:uppercase;margin-bottom:20px}h1{font-size:clamp(38px,6.4vw,78px);line-height:1.18;letter-spacing:-.035em;margin:0 0 20px;font-weight:500}.subtitle{font-size:clamp(18px,2.1vw,26px);line-height:1.62;color:var(--accent);margin:0 0 32px}.thesis{border-left:3px solid var(--accent);padding:18px 0 18px 22px;font-size:18px;background:linear-gradient(90deg,rgba(255,253,248,.7),transparent)}
.hero-side,.card,.article-body{background:rgba(255,253,248,.68);border:1px solid var(--line);box-shadow:0 22px 60px rgba(49,43,33,.07)}.hero-side{padding:28px}.meta-title{font-size:24px;line-height:1.45;margin-top:8px}.meta-list{margin:24px 0 0;padding:0;list-style:none;font-size:13px;color:var(--muted)}.meta-list li{padding:10px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px}
.section{padding:72px 0;border-top:1px solid var(--line)}h2{font-size:clamp(28px,3.6vw,48px);line-height:1.25;letter-spacing:-.03em;margin:0 0 24px;font-weight:500}.lead{max-width:780px;font-size:18px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}.card{padding:24px;min-height:210px}.num{font-family:-apple-system,BlinkMacSystemFont,'Noto Sans JP',sans-serif;color:var(--brown);font-size:12px;letter-spacing:.14em}.card h3{font-size:22px;line-height:1.45;margin:12px 0}.card p{margin:0;color:var(--muted);font-size:14px}
.toc{columns:2;column-gap:42px;margin:34px 0 0;padding:0;list-style:none}.toc li{break-inside:avoid;border-bottom:1px solid var(--line);padding:12px 0}.toc a{text-decoration:none;display:flex;gap:14px}.chapter{width:3.5em;color:var(--brown);font-family:-apple-system,BlinkMacSystemFont,'Noto Sans JP',sans-serif;font-size:13px}.cta{background:var(--accent);color:#fffdf8;padding:44px;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}.button{border:1px solid rgba(255,253,248,.65);padding:13px 18px;text-decoration:none;font-family:-apple-system,BlinkMacSystemFont,'Noto Sans JP',sans-serif}
.site-footer{max-width:var(--max);margin:auto;padding:42px 22px 64px;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
.article-layout{display:grid;grid-template-columns:230px minmax(0,760px);gap:52px;padding:64px 0 90px}.article-nav{position:sticky;top:82px;align-self:start;font-family:-apple-system,BlinkMacSystemFont,'Noto Sans JP',sans-serif;color:var(--muted);font-size:13px}.article-nav a{display:block;padding:8px 0;border-bottom:1px solid var(--line);text-decoration:none}.article-body{padding:48px}.article-body h1{font-size:clamp(32px,4.4vw,56px)}.article-body h2{margin-top:56px;font-size:30px}.article-body p{font-size:17px}blockquote{margin:34px 0;padding:22px 26px;background:var(--soft);border-left:4px solid var(--brown);font-size:20px}.note{padding:18px 20px;background:#f1ede6;border:1px solid var(--line);font-size:14px;color:var(--muted)}
@media(max-width:840px){.nav{display:none}.hero{grid-template-columns:1fr;min-height:auto;padding-top:48px}.cards{grid-template-columns:1fr}.toc{columns:1}.cta{grid-template-columns:1fr}.article-layout{grid-template-columns:1fr;gap:24px}.article-nav{position:static}.article-body{padding:26px 20px}}