:root{--ink:#102a33;--ink-soft:#49636b;--paper:#f8f5ed;--white:#fff;--ocean:#0e5960;--ocean-dark:#073f49;--gold:#d3a444;--line:#dbe3df;--danger:#a33a32;--radius:18px;--shadow:0 18px 60px #0d2d341f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:#fbfcfa;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.55}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,.button{cursor:pointer}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.site-header{z-index:50;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#fffffff0;border-bottom:1px solid #102a3317;grid-template-columns:1fr auto 1fr;align-items:center;gap:28px;height:76px;padding:0 clamp(22px,5vw,80px);display:grid;position:sticky;top:0}.brand{align-items:center;gap:12px;width:max-content;font-size:18px;font-weight:800;display:inline-flex}.brand-mark{color:#fff;background:var(--ocean);border-radius:12px 4px;place-items:center;width:38px;height:38px;font-family:Georgia,serif;font-size:24px;display:grid}.site-header nav{color:var(--ink-soft);gap:30px;font-weight:650;display:flex}.site-header>.button{justify-self:end}.button{border:1px solid var(--ocean);color:#fff;background:var(--ocean);border-radius:10px;justify-content:center;align-items:center;padding:12px 18px;font-weight:750;transition:all .18s;display:inline-flex}.button:hover{background:var(--ocean-dark);transform:translateY(-1px)}.button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,a:focus-visible{outline-offset:3px;outline:3px solid #d3a4448c}.button:disabled{cursor:not-allowed;opacity:.48;transform:none}.button-small{padding:8px 14px;font-size:14px}.button-wide{width:100%;margin-top:10px}.button-secondary{color:var(--ocean);background:#fff}.hero{color:#fff;background:radial-gradient(circle at 85% 10%,#d3a44438,#0000 31%),linear-gradient(130deg,#092f39 0%,#0b5058 62%,#0e6667 100%);grid-template-columns:minmax(0,1.35fr) minmax(310px,.65fr);align-items:center;gap:clamp(44px,8vw,120px);min-height:640px;padding:76px clamp(24px,7vw,112px);display:grid;overflow:hidden}.hero h1{letter-spacing:-.045em;margin:14px 0 24px;font-family:Georgia,Times New Roman,serif;font-size:clamp(48px,6.2vw,84px);font-weight:500;line-height:1.02}.hero-lead{color:#ffffffd1;max-width:720px;font-size:19px}.eyebrow{color:var(--ocean);text-transform:uppercase;letter-spacing:.15em;margin:0 0 8px;font-size:12px;font-weight:850}.eyebrow.light{color:#f1ca7a}.hero-search{max-width:760px;box-shadow:var(--shadow);background:#fff;border-radius:14px;margin-top:34px;padding:6px;display:flex}.hero-search input{min-width:0;color:var(--ink);background:0 0;border:0;flex:1;padding:15px}.hero-search button{color:#fff;background:var(--gold);border:0;border-radius:10px;padding:0 25px;font-weight:800}.hero-trust{color:#ffffffb8;flex-wrap:wrap;gap:20px;margin-top:20px;font-size:13px;display:flex}.hero-panel{background:var(--paper);color:var(--ink);border-radius:22px;padding:34px;transform:rotate(1.2deg);box-shadow:0 30px 80px #00000047}.hero-panel blockquote{margin:24px 0;font-family:Georgia,serif;font-size:26px;line-height:1.35}.answer-preview{border-top:1px solid #dfd7c4;padding-top:20px}.answer-preview span{color:var(--ocean);font-size:12px;font-weight:800}.section{max-width:1640px;margin:0 auto;padding:74px clamp(24px,7vw,112px)}.page-section{min-height:70vh}.section-heading{justify-content:space-between;align-items:end;margin-bottom:30px;display:flex}.section h1,.section h2{letter-spacing:-.025em;font-family:Georgia,Times New Roman,serif;font-weight:500}.section h1{margin:8px 0 18px;font-size:clamp(42px,5vw,66px)}.section-heading h2{margin:4px 0;font-size:clamp(34px,4vw,52px)}.section-heading>a{color:var(--ocean);font-weight:750}.book-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:26px;display:grid}.book-card{border-radius:var(--radius);border:1px solid var(--line);background:#fff;min-width:0;transition:all .2s;overflow:hidden}.book-card:hover{box-shadow:var(--shadow);transform:translateY(-5px)}.cover-link{aspect-ratio:2/2.6;background:#e8ece8;display:block;overflow:hidden}.book-cover{object-fit:cover;width:100%;height:100%;display:block}.book-card-body{padding:20px}.book-card h3{min-height:50px;margin:8px 0;font-size:20px;line-height:1.25}.muted{color:var(--ink-soft)}.book-card-footer{border-top:1px solid var(--line);justify-content:space-between;align-items:center;padding-top:16px;display:flex}.book-card-footer a{color:var(--ocean);font-weight:750}.value-grid{grid-template-columns:repeat(3,1fr);gap:1px;padding-top:0;display:grid}.value-grid article{background:var(--paper);border-right:1px solid #ded9ca;padding:38px}.value-grid article:last-child{border:0}.value-grid span{color:var(--gold);font-weight:900}.value-grid h3{margin:30px 0 10px;font-family:Georgia,serif;font-size:28px}.catalog-search{background:var(--paper);border-radius:var(--radius);grid-template-columns:minmax(0,1fr) 220px auto;gap:12px;margin:30px 0 42px;padding:16px;display:grid}.catalog-search input,.catalog-search select{border:1px solid var(--line);background:#fff;border-radius:10px;width:100%;padding:13px}.empty-state{border-radius:var(--radius);text-align:center;background:var(--paper);border:1px dashed #b9c8c3;padding:70px 30px}.book-detail{grid-template-columns:minmax(250px,.62fr) minmax(360px,1.2fr) minmax(280px,.68fr);align-items:start;gap:clamp(30px,5vw,72px);display:grid}.book-detail-cover img{width:100%;box-shadow:var(--shadow);border-radius:8px 20px 20px 8px}.book-detail-copy h1{line-height:1.05}.subtitle{color:var(--ink-soft);font-family:Georgia,serif;font-size:22px}.author{font-weight:750}.description{color:var(--ink-soft);font-size:17px}.feature-pills{flex-wrap:wrap;gap:8px;margin:25px 0 38px;display:flex}.feature-pills span{color:var(--ocean);background:#e7f1ee;border-radius:30px;padding:8px 12px;font-size:13px;font-weight:750}.metadata{background:var(--line);grid-template-columns:repeat(3,1fr);gap:1px;margin-top:34px;display:grid}.metadata div{background:#fff;padding:14px}.metadata dt{color:var(--ink-soft);font-size:12px}.metadata dd{margin:4px 0 0;font-weight:750}.purchase-panel{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;padding:28px;position:sticky;top:105px}.price{margin:0 0 12px;font-family:Georgia,serif;font-size:35px}.trust-list{color:var(--ink-soft);padding-left:19px;font-size:14px}.form-message{color:var(--ocean-dark);background:#eaf4f2;border-radius:10px;padding:12px 14px}.library-list{gap:18px;margin-top:30px;display:grid}.library-list article{border:1px solid var(--line);border-radius:var(--radius);background:#fff;grid-template-columns:120px 1fr;gap:24px;padding:20px;display:grid}.library-list img{border-radius:6px;width:120px}.library-list h2{margin:4px 0}.progress{background:#e3e9e6;border-radius:8px;max-width:420px;height:7px;overflow:hidden}.progress span{background:var(--gold);height:100%;display:block}.cart-layout{grid-template-columns:minmax(0,1fr) 360px;gap:36px;display:grid}.cart-item{border-bottom:1px solid var(--line);grid-template-columns:90px 1fr auto;align-items:center;gap:20px;padding:18px 0;display:grid}.cart-item img{border-radius:5px;width:90px}.cart-item h2{margin:0;font-size:24px}.reader-shell{background:#e9ece8;min-height:calc(100vh - 76px)}.reader-toolbar{color:#fff;background:#102f38;grid-template-columns:1fr auto 1fr;align-items:center;height:64px;padding:0 24px;display:grid}.reader-toolbar div{justify-self:end;gap:4px;display:flex}.reader-toolbar button{color:#fff;background:0 0;border:1px solid #ffffff40;border-radius:7px;padding:6px 9px}.reader-layout{grid-template-columns:210px minmax(420px,1fr) 340px;min-height:calc(100vh - 140px);display:grid}.reader-toc,.assistant-panel{background:#fff;padding:28px 20px}.reader-toc{border-right:1px solid var(--line)}.reader-toc button{text-align:left;background:0 0;border:0;border-radius:8px;width:100%;padding:11px}.reader-toc button.active{color:var(--ocean);background:#e8f2f0;font-weight:750}.reader-page{-webkit-user-select:text;user-select:text;background:#fffdf8;width:min(740px,100% - 50px);min-height:880px;margin:38px auto;padding:80px clamp(40px,7vw,92px);font-family:Georgia,serif;font-size:20px;line-height:1.85;position:relative;overflow:hidden;box-shadow:0 12px 50px #142a2e26}.reader-page h1{font-size:45px;line-height:1.14}.watermark{color:#19464b17;white-space:nowrap;pointer-events:none;font:700 34px Inter,sans-serif;position:absolute;inset:50% auto auto 12%;transform:rotate(-28deg)}.reader-policy{color:#71807d;border-top:1px solid #ded8c9;margin-top:70px;padding-top:20px;font:12px Inter,sans-serif}.assistant-panel{border-left:1px solid var(--line)}.assistant-panel textarea{border:1px solid var(--line);resize:vertical;border-radius:10px;width:100%;min-height:120px;padding:12px}.assistant-answer{background:var(--paper);border-radius:12px;margin-top:20px;padding:16px}.assistant-answer small{color:var(--ocean);margin-top:8px;display:block}.site-footer{color:#fff;background:#082f38;justify-content:space-between;padding:55px clamp(24px,7vw,112px);display:flex}.site-footer div:last-child{gap:24px;display:flex}@media (max-width:1100px){.book-grid{grid-template-columns:repeat(3,1fr)}.book-detail{grid-template-columns:240px 1fr}.book-detail .purchase-panel{grid-column:1/-1;position:static}.reader-layout{grid-template-columns:1fr 300px}.reader-toc{display:none}}@media (max-width:780px){.site-header{grid-template-columns:1fr auto}.site-header nav{display:none}.hero{grid-template-columns:1fr;padding-top:54px}.hero-panel{display:none}.hero h1{font-size:49px}.book-grid{grid-template-columns:repeat(2,1fr);gap:14px}.value-grid,.catalog-search,.book-detail{grid-template-columns:1fr}.book-detail-cover{max-width:280px}.cart-layout{grid-template-columns:1fr}.reader-layout{display:block}.assistant-panel{border:0}.reader-page{min-height:600px;margin:16px auto}.site-footer{flex-direction:column;gap:20px}.site-footer div:last-child{flex-direction:column;gap:8px}}@media (max-width:480px){.book-grid{grid-template-columns:1fr}.hero-search{display:grid}.hero-search button{padding:13px}.section{padding-left:18px;padding-right:18px}.metadata{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important}}