:root{--navy:#00215b;--indigo:#250759;--plum:#5a2049;--lav:#615489;--paper:#f6f4ef;--ink:#1c1830;--mute:#6b6880}
*{box-sizing:border-box}body{margin:0;font-family:"Nunito Sans",-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.6}
a{color:var(--indigo)}.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
header{background:#fff;border-bottom:1px solid #e6e2ef;position:sticky;top:0;z-index:5}
.bar{display:flex;align-items:center;justify-content:space-between;height:76px}.bar img{height:44px}
nav a{margin-left:26px;text-decoration:none;font-weight:700;color:var(--navy)}nav a.btn{background:var(--indigo);color:#fff;padding:9px 18px;border-radius:999px}
.burger{display:none;font-size:28px;background:none;border:0;color:var(--indigo)}
.hero{background:linear-gradient(135deg,var(--navy),var(--indigo) 55%,var(--plum));color:#fff;padding:90px 0 80px}
.hero h1{font-family:Georgia,"Times New Roman",serif;font-size:clamp(34px,5vw,58px);line-height:1.1;margin:0 0 18px;max-width:760px}
.hero p{font-size:19px;max-width:620px;opacity:.9}.search{display:flex;max-width:560px;margin-top:28px}
.search input{flex:1;padding:15px 18px;border:0;border-radius:999px 0 0 999px;font-size:16px}.search button{border:0;background:var(--plum);color:#fff;padding:0 26px;border-radius:0 999px 999px 0;font-weight:700}
section{padding:70px 0}h2{font-family:Georgia,serif;font-size:34px;margin:0 0 8px;color:var(--indigo)}.lead{color:var(--mute);margin:0 0 34px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:28px}
.card{text-decoration:none;color:inherit}.card:hover .cover{transform:translateY(-4px);box-shadow:0 14px 28px rgba(37,7,89,.3)}
.cover{aspect-ratio:2/3;border-radius:4px 10px 10px 4px;padding:18px 14px;display:flex;flex-direction:column;justify-content:space-between;color:#fff;box-shadow:0 6px 16px rgba(37,7,89,.2);transition:.2s;border-left:8px solid rgba(0,0,0,.25);font-family:Georgia,serif}
.cover .t{font-size:19px;line-height:1.15;font-weight:700}.cover .a{font-size:12px;letter-spacing:.12em;text-transform:uppercase;opacity:.85}.cover .k{font-family:sans-serif;font-size:10px;opacity:.7;border-top:1px solid rgba(255,255,255,.4);padding-top:6px}
.c1{background:var(--indigo)}.c2{background:var(--navy)}.c3{background:var(--plum)}.c4{background:var(--lav)}.c5{background:linear-gradient(160deg,var(--navy),var(--plum))}
.meta{margin-top:10px}.meta .au{font-size:13px;color:var(--mute)}.meta .ti{font-weight:700}.meta .pr{color:var(--plum);font-weight:700;font-size:14px}
.alt{background:#fff}.chips{display:flex;flex-wrap:wrap;gap:12px}.chips a{padding:10px 18px;border-radius:999px;border:2px solid var(--lav);text-decoration:none;font-weight:700}.chips a:hover{background:var(--indigo);color:#fff;border-color:var(--indigo)}
.authors{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;margin-top:40px}.author{background:var(--paper);border-radius:12px;padding:22px}.author b{color:var(--indigo);font-family:Georgia,serif;font-size:20px}.author small{display:block;color:var(--mute)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}.about img{width:100%;max-width:340px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.step{background:#fff;border-radius:14px;padding:26px;border-top:5px solid var(--plum)}.step span{font-size:30px;font-weight:800;color:var(--lav)}
form{display:grid;gap:14px}input,textarea{padding:13px;border:1px solid #cfc9dd;border-radius:8px;font:inherit}form button{background:var(--indigo);color:#fff;border:0;padding:14px;border-radius:999px;font-weight:700;font-size:16px}
footer{background:var(--ink);color:#c9c4da;padding:50px 0 30px}footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px}footer a{color:#fff;text-decoration:none;display:block;margin:4px 0}footer h4{color:#fff;margin:0 0 10px}.fine{border-top:1px solid #333;margin-top:30px;padding-top:18px;font-size:13px}
.detail{display:grid;grid-template-columns:320px 1fr;gap:50px}.detail .cover{max-width:320px}.detail .cover .t{font-size:30px}.opts{display:flex;gap:12px;margin:20px 0}.opts label{border:2px solid var(--lav);border-radius:10px;padding:12px 16px;cursor:pointer}.buy{background:var(--plum);color:#fff;border:0;padding:15px 34px;border-radius:999px;font-size:17px;font-weight:700}
@media(max-width:820px){nav{display:none}nav.open{display:flex;flex-direction:column;position:absolute;top:76px;left:0;right:0;background:#fff;padding:16px 24px}nav.open a{margin:8px 0}.burger{display:block}.two,.detail{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr}footer .cols{grid-template-columns:1fr 1fr}.grid{grid-template-columns:repeat(2,1fr);gap:18px}section{padding:50px 0}}
@media(min-width:1100px){#books .grid{grid-template-columns:repeat(6,1fr)}}