:root{--canvas:#f4f2ed;--paper:#fffefa;--ink:#252c28;--muted:#5e685f;--accent:#b64c33;--line:#e4e1d8;--peach:#f4c8b5}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--canvas);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit}a:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:3px}.shell{max-width:960px;margin:auto;padding:30px 24px 85px}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;gap:16px;font-size:12px}.top a{text-decoration:none}.brand{font-weight:800;letter-spacing:.13em}.back{color:var(--muted)}.hero{background:var(--ink);color:var(--paper);border-radius:26px;padding:clamp(28px,6vw,64px)}.eyebrow{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--peach);font-weight:700}.hero h1{font-size:clamp(36px,6vw,66px);line-height:1.14;letter-spacing:-.06em;margin:18px 0}.hero .lead{font-size:clamp(17px,2.2vw,22px);line-height:1.85;max-width:680px;color:#ece9e1}.story{margin-top:20px;background:var(--paper);border-radius:25px;padding:clamp(26px,6vw,62px)}.story h2{font-size:clamp(23px,3vw,31px);letter-spacing:-.04em;margin:36px 0 14px}.story h2:first-child{margin-top:0}.story p,.story li{font-size:16px;line-height:1.95;color:#424b44;max-width:710px}.story p{margin:0 0 17px}.story strong{color:var(--ink)}.story a{color:var(--accent);text-underline-offset:4px}.example{background:#f4f2ed;border:1px solid var(--line);border-radius:16px;padding:21px 24px;margin:25px 0}.example p{margin:0}.relations{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:20px}.relation{border:1px solid var(--line);border-radius:16px;padding:20px;text-decoration:none;display:block;color:var(--ink)!important;transition:border-color .2s,background .2s}.relation:hover{border-color:var(--accent);background:#fbf1ec}.relation strong{display:block}.relation small{display:block;color:var(--muted);font-size:13px;line-height:1.6;margin-top:6px}.foot{border-top:1px solid var(--line);margin-top:40px;padding-top:20px;color:var(--muted);font-size:13px}.foot a{font-size:13px}@media(max-width:620px){.shell{padding:15px 13px 45px}.hero{border-radius:22px;padding:30px 26px}.story{border-radius:22px;padding:29px 24px}.story p,.story li{font-size:15px}.relations{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Minimal Concepts index — intentionally isolated from the article page styles. */
.atlas-shell{width:min(100%,720px);margin:0 auto;padding:32px 26px 96px}
.atlas-nav{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-bottom:19px;border-bottom:1px solid var(--line);font-size:12px}
.atlas-nav a{text-decoration:none}.atlas-brand{font-weight:800;letter-spacing:.12em;color:var(--ink)}.atlas-current{color:var(--muted)}.atlas-nav a:hover{color:var(--accent)}
.atlas-main{padding-top:25px}
.atlas-search{display:flex;align-items:center;gap:13px;border-bottom:1px solid #c5cac1;transition:border-color .2s}
.atlas-search:focus-within{border-color:var(--accent)}
.atlas-search svg{width:18px;height:18px;flex:none;color:#758077}
.atlas-search input{min-width:0;width:100%;padding:13px 0 14px;border:0;outline:none;background:transparent;font:inherit;font-size:15px;color:var(--ink)}
.atlas-search input::placeholder{color:#777e77}
.atlas-visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.atlas-terms{list-style:none;margin:24px 0 0;padding:0}
.atlas-term{border-bottom:1px solid var(--line)}
.atlas-term[hidden],.atlas-empty[hidden]{display:none!important}
.atlas-term a{display:block;position:relative;padding:24px 32px 23px 0;color:var(--ink);text-decoration:none}
.atlas-term-title{display:flex;align-items:baseline;flex-wrap:wrap;gap:13px}
.atlas-term-title strong{font-size:18px;letter-spacing:-.02em;font-weight:650}
.atlas-term-title span{font-size:14px;color:var(--muted)}
.atlas-term-description{display:block;margin-top:8px;color:#59635a;font-size:14px;line-height:1.75;max-width:620px}
.atlas-term-arrow{position:absolute;right:2px;top:26px;font-size:17px;color:#899187}
.atlas-term a:hover .atlas-term-title strong,.atlas-term a:focus-visible .atlas-term-title strong{color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.atlas-term a:hover .atlas-term-arrow,.atlas-term a:focus-visible .atlas-term-arrow{color:var(--accent)}
.atlas-empty{font-size:14px;color:var(--muted);margin:22px 0}
@media(max-width:620px){.atlas-shell{padding:21px 22px 70px}.atlas-main{padding-top:20px}.atlas-term a{padding:21px 27px 20px 0}.atlas-term-title{gap:8px}.atlas-term-title strong{font-size:17px}.atlas-term-title span{font-size:13px}.atlas-term-description{font-size:14px}}