:root{--bg:#f6f4ef;--surface:#fff;--text:#1d2430;--muted:#68717f;--accent:#375f4f;--line:#e4e0d7;--radius:18px;--shadow:0 14px 35px rgba(25,31,35,.08)}*{box-sizing:border-box}html{color-scheme:light}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.8rem clamp(1rem,4vw,3rem);background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.site-header nav{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}.site-header form{margin:0}.brand{font-weight:800;color:var(--text);text-decoration:none}.page-shell{width:min(1160px,calc(100% - 2rem));margin:0 auto;padding:2rem 0 4rem}.eyebrow{text-transform:uppercase;letter-spacing:.11em;font-size:.76rem;font-weight:800;color:var(--accent)}h1,h2{line-height:1.12}.library-head{display:grid;gap:1.5rem;margin-bottom:2rem}.library-search label{display:block;font-weight:700;margin-bottom:.35rem}.library-search div{display:flex;gap:.5rem}.library-search input{min-width:0;flex:1;padding:.8rem 1rem;border:1px solid var(--line);border-radius:12px;background:var(--surface)}button,.button{border:0;border-radius:11px;padding:.75rem 1rem;background:var(--accent);color:white;font-weight:800;text-decoration:none;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.button.ghost{background:#edf2ef;color:var(--accent)}.book-grid{display:grid;grid-template-columns:1fr;gap:1.2rem}.book-card{display:grid;grid-template-columns:112px 1fr;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.cover-wrap{min-height:170px;background:#e9e4da;display:block}.cover-wrap img,.book-cover-large img{width:100%;height:100%;object-fit:cover}.cover-placeholder{height:100%;min-height:170px;display:grid;place-items:center;font-size:2.5rem;background:linear-gradient(145deg,#e8e1d6,#cfc4b1)}.book-card-body{padding:1rem}.book-card h2{margin:.15rem 0 .3rem;font-size:1.08rem}.book-card h2 a{color:inherit;text-decoration:none}.book-meta,.book-author{color:var(--muted);margin:.2rem 0;font-size:.9rem}.progress-line{height:7px;background:#e8ebe9;border-radius:999px;overflow:hidden;margin:.9rem 0}.progress-line span{display:block;height:100%;background:var(--accent);border-radius:inherit}.progress-line.wide{max-width:520px}.card-footer{display:flex;align-items:center;justify-content:space-between;gap:.8rem;color:var(--muted);font-size:.84rem}.book-hero{display:grid;gap:1.5rem;background:var(--surface);padding:1.2rem;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.book-cover-large{width:160px;aspect-ratio:2/3;overflow:hidden;border-radius:12px}.book-description{max-width:70ch}.chapter-list{margin-top:2rem;background:var(--surface);padding:1rem;border:1px solid var(--line);border-radius:var(--radius)}.chapter-list ol{list-style:none;padding:0;margin:0}.chapter-list li+li{border-top:1px solid var(--line)}.chapter-list a{display:grid;grid-template-columns:42px 1fr auto;gap:.7rem;align-items:center;padding:1rem 0;color:inherit;text-decoration:none}.chapter-number{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:#eef2ef;color:var(--accent);font-weight:800}.completed{opacity:.72}.auth-card,.empty-state{max-width:520px;margin:4rem auto;background:var(--surface);padding:1.4rem;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}.auth-card label{display:grid;gap:.35rem;margin:.9rem 0;font-weight:700}.auth-card input{padding:.8rem;border:1px solid var(--line);border-radius:10px}.alert{background:#fff0ef;color:#8f2e27;padding:.8rem;border-radius:10px}@media(min-width:768px){.library-head{grid-template-columns:1fr minmax(320px,420px);align-items:end}.book-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.book-hero{grid-template-columns:220px 1fr;padding:2rem}.book-cover-large{width:220px}}@media(min-width:1050px){.book-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.book-card{grid-template-columns:135px 1fr}}