.reader-frame{min-height:100svh;background:#f0f2f4;padding-bottom:40px}.reader-toolbar{width:min(1120px,calc(100% - 64px));margin-inline:auto;min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:20px}.reader-back{color:var(--color-muted);font-size:14px;display:inline-flex;align-items:center;min-height:44px}.reader-back:hover{color:var(--color-accent)}.reader-shell{width:min(920px,calc(100% - 64px));margin:18px auto 0}.reader-book-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:0 4px 16px}.reader-book-heading p{font-size:14px;font-weight:600;color:#32445b}.reader-book-heading>span{font-size:12px;color:var(--color-muted)}.reader-paper{background:#fffefa;border:1px solid #dce1e6;border-radius:12px;box-shadow:0 8px 32px #1c30400b,4px 4px 0 -1px #f9faf9,4px 4px #dce1e6}.reader-cover{padding:24px 32px 0}.reader-cover img{width:100%;height:auto;max-height:310px;object-fit:contain;display:block;border-radius:4px}.reader-content{padding:30px 54px 34px}.reader-chapter{color:#a15423;font:12px/1.7 var(--font-mono);letter-spacing:.065em;text-transform:uppercase;display:flex;gap:10px;margin-bottom:14px}.reader-content h1{font-family:Georgia,Times New Roman,serif;font-size:clamp(32px,4.6vw,46px);font-weight:500;line-height:1.15;letter-spacing:-.035em;max-width:720px}.reader-content .reader-lead{font-size:20px;line-height:1.65;color:#344760;margin-top:18px;max-width:690px}.reader-copy{font-size:16px;line-height:1.85;color:var(--color-muted);margin-top:16px;max-width:690px}.reader-intro-note{border-left:3px solid #ca7c3d;padding-left:18px;margin-top:24px;color:#32445b;font-size:15px;line-height:1.7}.reader-intro-note strong{display:block;margin-bottom:3px;font-weight:600}.reader-pagination{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;padding:22px 40px;border-top:1px solid #e7e6df}.reader-page-link{display:inline-flex;gap:10px;align-items:center;justify-content:center;min-height:46px;padding:10px 18px;border:1px solid #d8dfe6;border-radius:6px;color:#233c57;font-size:14px;font-weight:550}.reader-page-link:hover{background:#edf2f7}.reader-previous{justify-self:start}.reader-next{justify-self:end;background:#1b3653;border-color:#1b3653;color:#fff}.reader-next:hover{background:#245079;border-color:#245079}.reader-page-link.is-disabled{color:#7d8791;background:transparent;border-color:transparent;cursor:default}.reader-page-numbers{display:flex;gap:6px;list-style:none;margin:0;padding:0}.reader-page-numbers a{display:flex;align-items:center;justify-content:center;width:44px;height:44px;font-size:14px;border-radius:50%;color:var(--color-muted)}.reader-page-numbers a[aria-current]{background:#e9eef3;color:#1b3653;font-weight:650}.reader-footnote{display:flex;justify-content:space-between;gap:16px;padding:22px 5px 0;font-size:12px;color:var(--color-muted)}.reader-diagram{margin:26px 32px 0;padding:30px;background:#edf3f8;border:1px solid #dce6ee;border-radius:8px}.reader-diagram>p{font:12px/1.6 var(--font-mono);letter-spacing:.055em;text-transform:uppercase;color:#526b84;margin-bottom:24px}.reader-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:26px;list-style:none;padding:0;margin:0}.reader-flow li{position:relative;padding:20px 14px;background:#fff;border:1px solid #d6e0e9;border-radius:6px}.reader-flow li:not(:last-child):after{content:"→";position:absolute;right:-23px;top:48%;color:#637e97;font-size:19px}.reader-flow .flow-number{display:block;color:#547693;font:11px/1.4 var(--font-mono);margin-bottom:12px}.reader-flow strong{display:block;color:#233c57;font-size:16px;font-weight:600}.reader-flow .flow-detail{display:block;margin-top:7px;font-size:12px;line-height:1.65;color:#63768a}.reader-flow .flow-spec{border-color:#cc8c55;background:#fff9f0}.reader-flow .flow-spec strong,.reader-flow .flow-spec .flow-number{color:#9a5626}.reader-example{margin-top:26px}.reader-example h2{font-size:20px;font-weight:600;line-height:1.4;letter-spacing:-.02em}.reader-example-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:20px;margin-top:14px}.reader-example-card{border:1px solid #e2e5e8;background:#fff;border-radius:6px;padding:20px}.reader-example-card h3{font:11px/1.6 var(--font-mono);letter-spacing:.045em;text-transform:uppercase;color:#617187;margin-bottom:12px}.reader-example-card blockquote{font-family:Georgia,Times New Roman,serif;font-size:21px;line-height:1.6;color:#344760;margin:0}.reader-example-card p{font-size:13px;line-height:1.7;color:var(--color-muted);margin-top:14px}.reader-example-spec{background:#f5f8fb;border-color:#d8e2ec}.reader-example-spec ul{padding-inline-start:18px;margin:0;list-style:disc;font-size:14px;line-height:1.8;color:#344760}.reader-example-spec li+li{margin-top:5px}.reader-takeaway{font-size:14px;line-height:1.8;color:#465b72;margin-top:20px}@media(max-width:767px){.reader-toolbar{width:calc(100% - 32px);min-height:76px;gap:12px}.reader-toolbar .wordmark{font-size:18px}.reader-back{font-size:12px}.reader-shell{width:calc(100% - 28px);margin-top:10px}.reader-book-heading{flex-direction:column;gap:5px}.reader-cover{padding:16px 14px 0}.reader-content{padding:24px 22px}.reader-content .reader-lead{font-size:18px}.reader-copy{font-size:15px}.reader-pagination{gap:8px;padding:18px 12px}.reader-page-link{padding:8px;gap:5px;font-size:12px}.reader-page-numbers{gap:0}.reader-page-numbers a{width:36px}.reader-footnote{flex-wrap:wrap;font-size:11px}.reader-diagram{margin:14px 14px 0;padding:20px}.reader-diagram>p{margin-bottom:16px}.reader-flow{grid-template-columns:1fr;gap:24px}.reader-flow li{display:grid;grid-template-columns:26px 1fr;column-gap:8px;padding:12px 16px}.reader-flow .flow-number{grid-row:1 / 3;margin:4px 0 0}.reader-flow .flow-detail{margin-top:3px}.reader-flow li:not(:last-child):after{content:"↓";right:50%;top:auto;bottom:-24px}.reader-example-grid{grid-template-columns:1fr;gap:12px}}