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.bookshelf{--paper:var(--color-paper);--paper-dim:var(--color-paper-dim);--ink:var(--color-ink);--ink70:var(--color-ink-70);--ink50:var(--color-ink-50);--ink30:var(--color-ink-30);--rule:var(--color-rule);--accent:var(--color-accent);background:var(--paper);color:var(--ink);font-family:var(--font-sans), system-ui, sans-serif;font-feature-settings:"ss01", "cv11", "lnum";line-height:1.5}.bookshelf *{box-sizing:border-box;margin:0;padding:0}.bookshelf .wrap{max-width:760px;margin:0 auto;padding:0 28px}.bookshelf .mono{font-family:var(--font-mono), ui-monospace, monospace}.bookshelf .serif{font-family:var(--font-serif), serif}.bookshelf .tnum{font-variant-numeric:tabular-nums lining-nums}.bookshelf header.site{border-bottom:1px solid var(--rule)}.bookshelf header.site .wrap{justify-content:space-between;align-items:center;height:64px;display:flex}.bookshelf .logo{font-family:var(--font-serif), serif;letter-spacing:-.02em;font-size:22px;font-weight:600}.bookshelf .logo .dot{color:var(--accent)}.bookshelf .navcta{color:#fff;background:var(--ink);border-radius:999px;padding:9px 16px;font-size:13.5px;font-weight:600;text-decoration:none}.bookshelf .eyebrow{font-family:var(--font-mono), monospace;letter-spacing:.26em;text-transform:uppercase;color:var(--accent);align-items:center;gap:14px;font-size:12.5px;font-weight:500;display:flex}.bookshelf .eyebrow .dash{background:var(--accent);opacity:.5;width:38px;height:1px}.bookshelf h1{font-family:var(--font-serif), serif;letter-spacing:-.022em;margin-top:22px;font-size:54px;font-weight:540;line-height:1.04}.bookshelf h1 em{color:var(--accent);font-style:normal}.bookshelf .dek{color:var(--ink70);max-width:34ch;margin-top:22px;font-size:21px;line-height:1.5}.bookshelf .byline{font-family:var(--font-mono), monospace;color:var(--ink50);letter-spacing:.02em;margin-top:26px;font-size:12.5px}.bookshelf section{margin-top:64px}.bookshelf h2{font-family:var(--font-serif), serif;letter-spacing:-.02em;font-size:32px;font-weight:560;line-height:1.12}.bookshelf h3{font-family:var(--font-serif), serif;letter-spacing:-.01em;margin-top:34px;font-size:21px;font-weight:560}.bookshelf p.body{color:var(--ink70);margin-top:16px;font-size:18px;line-height:1.62}.bookshelf p.body b{color:var(--ink);font-weight:600}.bookshelf .lede{font-size:19px;line-height:1.6}.bookshelf .qa{border:1px solid var(--rule);background:#fff;border-radius:18px;margin-top:30px;padding:30px 32px;position:relative}.bookshelf .qa .tag{font-family:var(--font-mono), monospace;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);font-size:11px}.bookshelf .qa p{color:var(--ink);margin-top:12px;font-size:18.5px;line-height:1.6}.bookshelf .qa p b{font-weight:600}.bookshelf .chart{flex-direction:column;gap:18px;margin-top:30px;display:flex}.bookshelf .row{grid-template-columns:120px 1fr 78px;align-items:center;gap:16px;display:grid}.bookshelf .row .lab{font-size:16px;font-weight:600}.bookshelf .row .lab .ctx{font-family:var(--font-mono), monospace;color:var(--ink50);margin-top:2px;font-size:10.5px;font-weight:400;display:block}.bookshelf .track{background:var(--paper-dim);border-radius:6px;height:26px;overflow:hidden}.bookshelf .fill{background:var(--ink);border-radius:6px;height:100%}.bookshelf .fill.amz{background:var(--accent)}.bookshelf .cnt{font-family:var(--font-serif), serif;text-align:right;font-size:25px;font-weight:500}.bookshelf .cnt.amz{color:var(--accent)}.bookshelf .cap{font-family:var(--font-mono), monospace;color:var(--ink50);margin-top:14px;font-size:11.5px}.bookshelf .band{background:var(--ink);color:#e8e3d7;border-radius:20px;align-items:center;gap:34px;margin-top:34px;padding:34px 38px;display:flex}.bookshelf .band .big{font-family:var(--font-serif), serif;color:var(--paper);letter-spacing:-.03em;font-size:84px;font-weight:600;line-height:.9}.bookshelf .band .big sup{font-size:36px;font-weight:500}.bookshelf .band .txt{color:#cfc9bb;font-size:18px;line-height:1.45}.bookshelf .band .txt b{color:var(--paper);font-weight:600}.bookshelf .league{background:#fff;border:1px solid #ececef;border-radius:16px;margin-top:24px;overflow:hidden}.bookshelf .league .lr{border-top:1px solid #f0f0f3;justify-content:space-between;align-items:center;gap:16px;padding:13px 20px;display:flex}.bookshelf .league .lr:first-child{border-top:none}.bookshelf .league .lr .l{align-items:center;gap:14px;min-width:0;display:flex}.bookshelf .league .lr .rk{font-family:var(--font-mono), monospace;color:var(--ink30);font-size:12px}.bookshelf .league .lr .nm{font-size:15px;font-weight:600}.bookshelf .league .lr .v{align-items:center;gap:12px;display:flex}.bookshelf .league .lr .barwrap{background:var(--paper-dim);border-radius:99px;width:120px;height:7px;overflow:hidden}.bookshelf .league .lr .barwrap i{background:var(--ink);border-radius:99px;height:100%;display:block}.bookshelf .league .lr .num{font-family:var(--font-mono), monospace;text-align:right;width:42px;font-size:14px;font-weight:500}.bookshelf .cards{grid-template-columns:1fr 1fr;gap:14px;margin-top:24px;display:grid}.bookshelf .card{border:1px solid var(--rule);background:#fff;border-radius:16px;padding:22px}.bookshelf .card .src{font-family:var(--font-serif), serif;font-size:19px;font-weight:560}.bookshelf .card .met{font-family:var(--font-mono), monospace;color:var(--accent);margin-top:4px;font-size:12px}.bookshelf .card p{color:var(--ink70);margin-top:10px;font-size:14.5px;line-height:1.5}.bookshelf ul.check{flex-direction:column;gap:13px;margin-top:18px;list-style:none;display:flex}.bookshelf ul.check li{color:var(--ink70);gap:14px;font-size:17px;line-height:1.5;display:flex}.bookshelf ul.check li b{color:var(--ink);font-weight:600}.bookshelf ul.check li .n{background:var(--ink);width:26px;height:26px;color:var(--paper);font-family:var(--font-mono), monospace;border-radius:8px;flex:none;justify-content:center;align-items:center;margin-top:1px;font-size:13px;display:flex}.bookshelf .faq{border-top:1px solid var(--rule);margin-top:22px}.bookshelf details{border-bottom:1px solid var(--rule)}.bookshelf summary{cursor:pointer;font-family:var(--font-serif), serif;justify-content:space-between;align-items:baseline;gap:20px;padding:20px 0;font-size:19px;font-weight:560;list-style:none;display:flex}.bookshelf summary::-webkit-details-marker{display:none}.bookshelf summary:after{content:"+";font-family:var(--font-mono), monospace;color:var(--accent);flex:none;font-size:22px}.bookshelf details[open] summary:after{content:"–"}.bookshelf details p{color:var(--ink70);padding:0 0 22px;font-size:16.5px;line-height:1.6}.bookshelf .method{background:var(--paper-dim);border-radius:18px;margin-top:24px;padding:30px 32px}.bookshelf .method dl{grid-template-columns:140px 1fr;gap:10px 18px;margin-top:6px;display:grid}.bookshelf .method dt{font-family:var(--font-mono), monospace;text-transform:uppercase;letter-spacing:.08em;color:var(--ink50);padding-top:2px;font-size:12px}.bookshelf .method dd{color:var(--ink70);font-size:15.5px}.bookshelf .method dd b{color:var(--ink);font-weight:600}.bookshelf .presskit .igs{grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px;display:grid}.bookshelf .ig{color:var(--ink70);flex-direction:column;gap:10px;text-decoration:none;transition:transform .15s;display:flex}.bookshelf .ig:hover{transform:translateY(-3px)}.bookshelf .ig img{border:1px solid var(--rule);background:#fff;border-radius:12px;width:100%;height:auto;display:block;box-shadow:0 1px 2px #0a0e140a}.bookshelf .ig:hover img{border-color:var(--accent)}.bookshelf .ig span{font-family:var(--font-mono), monospace;color:var(--ink50);font-size:12px;line-height:1.45}.bookshelf .cta{background:var(--ink);color:#e8e3d7;text-align:center;border-radius:22px;margin:64px 0 0;padding:46px 44px}.bookshelf .cta h2{color:var(--paper)}.bookshelf .cta p{color:#cfc9bb;max-width:46ch;margin-top:14px;margin-left:auto;margin-right:auto;font-size:18px}.bookshelf .cta a{background:var(--paper);color:var(--ink);border-radius:999px;margin-top:24px;padding:14px 28px;font-size:16px;font-weight:600;text-decoration:none;display:inline-block}.bookshelf footer.site{border-top:1px solid var(--rule);margin-top:60px}.bookshelf footer.site .wrap{font-family:var(--font-mono), monospace;color:var(--ink50);flex-wrap:wrap;justify-content:space-between;gap:16px;padding:30px 28px;font-size:12px;display:flex}.bookshelf footer.site a{color:var(--ink70);text-decoration:none}.bookshelf .note{font-family:var(--font-mono), monospace;color:var(--ink30);margin-top:18px;font-size:11.5px;line-height:1.6}@media (max-width:640px){.bookshelf h1{font-size:38px}.bookshelf .dek{font-size:18px}.bookshelf .band{flex-direction:column;align-items:flex-start;gap:16px}.bookshelf .cards{grid-template-columns:1fr}.bookshelf .row{grid-template-columns:96px 1fr 60px}.bookshelf .method dl{grid-template-columns:1fr}.bookshelf .presskit .igs{grid-template-columns:1fr 1fr}}