:root{
  --bg:#f3f6fb;
  --bg2:#eef3f8;
  --ink:#17202b;
  --muted:#728090;
  --line:rgba(65,84,105,.14);
  --glass:rgba(255,255,255,.64);
  --shadow:0 24px 70px rgba(47,68,92,.10);
}
*{box-sizing:border-box}
html,body{height:100%;overflow:hidden}
body{
  margin:0;color:var(--ink);
  background:
    radial-gradient(circle at 6% 0%,rgba(255,255,255,.96),transparent 34%),
    radial-gradient(circle at 94% 3%,rgba(192,214,237,.52),transparent 30%),
    linear-gradient(145deg,var(--bg),#f9fbfd 50%,var(--bg2));
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,sans-serif;
  font-weight:300;letter-spacing:-.018em;
}
button,input,textarea,select{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
.books-app{height:100dvh;padding:16px 24px 20px;position:relative;overflow:hidden}
.ambient{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.ambient-ring{position:absolute;width:480px;height:480px;left:-200px;top:10%;border-radius:50%;background:conic-gradient(from 20deg,rgba(120,156,197,.07),rgba(151,190,224,.30),rgba(218,196,234,.15),rgba(120,156,197,.07));-webkit-mask:radial-gradient(circle,transparent 60%,#000 61% 64%,transparent 65%);mask:radial-gradient(circle,transparent 60%,#000 61% 64%,transparent 65%);animation:ringMove 18s ease-in-out infinite alternate}
.ambient-glow{position:absolute;width:480px;height:230px;right:5%;top:8%;border-radius:55% 45% 60% 40%;background:linear-gradient(120deg,rgba(255,255,255,.04),rgba(155,192,228,.17),rgba(219,200,237,.13));filter:blur(18px);opacity:.7;animation:glowMove 15s ease-in-out infinite alternate}
.ambient-line{position:absolute;width:520px;height:520px;right:-170px;bottom:-250px;border:1px solid rgba(117,148,184,.14);border-radius:50%;box-shadow:0 0 0 62px rgba(117,148,184,.025),0 0 0 124px rgba(255,255,255,.04)}
.books-header{height:54px;max-width:1320px;margin:0 auto;position:relative;z-index:5;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:500}
.logo{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(145deg,#fff,#cdd9e6);box-shadow:inset 0 1px 0 #fff,0 7px 18px rgba(71,95,122,.16);font-size:12px;font-weight:600;color:#42566f}
.page-nav{display:flex;gap:5px;padding:5px;border:1px solid rgba(255,255,255,.86);background:rgba(255,255,255,.46);backdrop-filter:blur(20px);border-radius:15px}
.page-nav a{text-decoration:none;color:#687687;font-size:13px;padding:8px 11px;border-radius:10px;transition:.2s}
.page-nav a:hover,.page-nav a.active{background:rgba(255,255,255,.86);color:#223244}
.account-link,.add-book{height:38px;display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:0 14px;text-decoration:none;border:0;cursor:pointer;transition:.2s}
.account-link{color:#5f7082;background:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.88);font-size:12px}
.add-book{background:#172535;color:#fff;box-shadow:0 8px 20px rgba(23,37,53,.15);font-size:12px;font-weight:500}
.add-book:hover,.account-link:hover{transform:translateY(-1px)}
.intro-add,.empty-add{display:none}
.books-main{height:calc(100% - 54px);max-width:1240px;margin:0 auto;position:relative;z-index:2;display:grid;grid-template-rows:auto 1fr;gap:14px;padding-top:14px}
.books-intro{display:flex;justify-content:space-between;align-items:end}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;background:rgba(255,255,255,.58);border:1px solid rgba(255,255,255,.92);color:#66778b;font-size:11px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:#8ea7c2}
.books-intro h1{font-size:64px;line-height:.9;letter-spacing:-.062em;font-weight:250;margin:11px 0 8px}
.books-intro p{margin:0;color:#6d7a88;font-size:13.5px;line-height:1.45;max-width:560px}
.books-meta{display:flex;align-items:center;gap:9px;padding-bottom:3px;color:#82909d;font-size:11px}
.shelf-zone{min-height:0;position:relative;display:flex;align-items:center;justify-content:center;padding-bottom:34px}
.shelf-scene{width:min(1120px,94vw);position:relative;height:390px;display:flex;align-items:flex-end;justify-content:center}
.books-row{position:absolute;left:4%;right:4%;bottom:74px;height:270px;display:flex;align-items:flex-end;justify-content:center;gap:10px;padding:0 28px;z-index:3}
.shelf{position:absolute;left:2%;right:2%;bottom:34px;height:52px;z-index:2}
.shelf-top{height:19px;border-radius:9px 9px 4px 4px;background:linear-gradient(180deg,#d9cbb9,#c7b49c);box-shadow:inset 0 1px 0 rgba(255,255,255,.6),0 8px 18px rgba(75,63,50,.11)}
.shelf-front{height:25px;margin:0 14px;border-radius:2px 2px 8px 8px;background:linear-gradient(180deg,#bda990,#ab957b);box-shadow:inset 0 1px 0 rgba(255,255,255,.28)}
.shelf-shadow{height:18px;margin:0 36px;background:radial-gradient(ellipse at center,rgba(60,66,76,.18),transparent 70%);filter:blur(7px)}
.empty-state{position:absolute;left:50%;top:47%;transform:translate(-50%,-50%);z-index:4;text-align:center;max-width:400px;transition:.25s}
.empty-state.hidden{opacity:0;pointer-events:none;transform:translate(-50%,-46%)}
.empty-mark{width:54px;height:54px;margin:0 auto 14px;border-radius:18px;display:grid;place-items:center;background:rgba(255,255,255,.6);border:1px solid rgba(255,255,255,.9);box-shadow:0 12px 34px rgba(51,73,98,.07);font-size:24px;color:#8398ae}
.empty-state h2{font-size:27px;font-weight:300;letter-spacing:-.04em;margin:0 0 8px}
.empty-state p{font-size:13px;line-height:1.5;color:#81909e;margin:0 auto}
.book{width:92px;height:238px;border-radius:5px 8px 5px 4px;position:relative;flex:0 0 auto;transform-origin:bottom center;box-shadow:4px 8px 16px rgba(47,55,67,.12),inset -2px 0 0 rgba(0,0,0,.05);cursor:pointer;transition:transform .22s ease,filter .22s ease}
.book:hover{transform:translateY(-8px) rotate(-1deg);filter:saturate(1.04)}
.book:nth-child(3n+2){height:252px}
.book:nth-child(4n+3){height:222px}
.book.mist{background:linear-gradient(160deg,#d8e6f2,#a9bfd4)}
.book.graphite{background:linear-gradient(160deg,#5a6674,#313c49);color:white}
.book.sand{background:linear-gradient(160deg,#e7d8c2,#bca689)}
.book.lavender{background:linear-gradient(160deg,#ddd7e9,#b9aecb)}
.book-spine{position:absolute;inset:0;padding:16px 10px 13px;display:flex;flex-direction:column;justify-content:space-between;border-left:1px solid rgba(255,255,255,.25);border-right:1px solid rgba(0,0,0,.04)}
.book-title{writing-mode:vertical-rl;transform:rotate(180deg);font-size:14px;line-height:1.1;font-weight:500;letter-spacing:-.02em;max-height:170px;overflow:hidden}
.book-year{font-size:9px;opacity:.65;align-self:flex-end}
.book-lock{position:absolute;top:9px;right:8px;width:18px;height:18px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.58);font-size:9px;color:#5b6d80}
.modal-backdrop{
  position:fixed;inset:0;z-index:20;
  background:rgba(31,42,54,.14);
  backdrop-filter:blur(18px) saturate(92%);
  display:none;align-items:center;justify-content:center;padding:24px
}
.modal-backdrop.show{display:flex}
.book-modal{
  width:min(980px,calc(100vw - 56px));
  height:min(760px,calc(100vh - 48px));
  padding:26px 28px 22px;border-radius:30px;
  background:rgba(255,255,255,.93);
  border:1px solid rgba(255,255,255,.98);
  box-shadow:0 28px 80px rgba(40,58,79,.13),0 4px 18px rgba(40,58,79,.06);
  display:grid;grid-template-rows:auto 1fr;gap:18px;
}
.modal-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.modal-kicker{font-size:10px;text-transform:uppercase;letter-spacing:.14em;color:#8c98a4}
.modal-head h2{font-size:34px;font-weight:300;letter-spacing:-.045em;margin:5px 0 0}
.modal-close{border:0;background:rgba(235,240,245,.78);width:34px;height:34px;border-radius:11px;cursor:pointer;color:#657586;font-size:20px}
.book-form{min-height:0;display:grid;grid-template-rows:1fr auto;gap:18px}
.book-form-grid{min-height:0;display:grid;grid-template-columns:300px 1fr;gap:20px}
.cover-column,.book-fields{min-height:0}
.section-label,.field>span{display:block;color:#71808e;font-size:11px;margin-bottom:6px}
.cover-upload-zone{
  height:350px;border:1px dashed rgba(87,110,135,.28);border-radius:20px;
  background:linear-gradient(180deg,#f8fafc,#f1f5f8);
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  padding:26px;cursor:pointer;
}
.cover-preview{
  width:76px;height:108px;margin:0 auto 14px;border-radius:10px;
  background:linear-gradient(160deg,#d9e5f0,#afc2d5);
  box-shadow:0 10px 25px rgba(55,75,98,.12);
  display:grid;place-items:center;color:#60758d;font-size:26px;
  background-size:cover;background-position:center;
}
.cover-upload-zone strong,.background-upload-zone strong,.file-upload-zone strong{font-size:12px;font-weight:500;color:#344354}
.cover-upload-zone>span{margin-top:7px;color:#9aa4ae;font-size:10px;line-height:1.4}
.book-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px 14px;align-content:start}
.field{display:block;margin:0}
.field.full{grid-column:1/-1}
.field input,.field textarea{
  width:100%;border:1px solid rgba(73,92,114,.14);background:#f7f9fb;border-radius:13px;
  padding:12px 13px;color:#1c2936;outline:none
}
.field input{height:43px}
.field textarea{height:90px;resize:none}
.field input:focus,.field textarea:focus{border-color:#9bb0c6;box-shadow:0 0 0 4px rgba(155,176,198,.11)}
.background-settings{grid-column:1/-1;display:grid;grid-template-columns:1.5fr .7fr;gap:14px}
.background-upload-zone{
  height:102px;border:1px dashed rgba(87,110,135,.25);border-radius:15px;
  background:linear-gradient(135deg,#f7f9fb,#eef3f7);
  display:flex;align-items:center;gap:14px;padding:13px;cursor:pointer
}
.background-preview-strip{display:flex;gap:5px;flex:0 0 auto;max-width:138px;overflow:hidden}
.background-preview-placeholder,.background-thumb{
  width:128px;height:72px;border-radius:10px;flex:0 0 128px;
  background:linear-gradient(135deg,#cddceb,#b9c7d8 55%,#d9d2e6);
  background-size:cover;background-position:center;
  box-shadow:0 6px 16px rgba(58,77,98,.1)
}
.background-thumb{width:64px;flex-basis:64px}
.background-upload-zone span{display:block;font-size:10px;color:#8b98a5;line-height:1.35;margin-top:3px}
.duration-field{position:relative}
.duration-field input{padding-right:48px}
.duration-field span{position:absolute;right:13px;top:14px;color:#8b98a5;font-size:11px}
.upload-grid{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:12px 14px}
.file-upload-zone{
  height:86px;border:1px dashed rgba(87,110,135,.25);border-radius:14px;background:#f8fafc;
  display:flex;align-items:center;gap:12px;padding:13px;cursor:pointer
}
.upload-icon{
  width:46px;height:46px;border-radius:12px;background:#eaf0f5;display:grid;place-items:center;
  color:#68809a;font-size:19px;flex:0 0 auto
}
.upload-copy{min-width:0}
.upload-copy strong,.upload-copy small{display:block}
.upload-copy small{font-size:10px;color:#8b98a5;line-height:1.35;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.price-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.price-field>span{font-size:10px}
.price-input{position:relative}
.price-input input{padding-right:34px}
.price-input>span{position:absolute;right:12px;top:14px;color:#8a96a1;font-size:12px}
.modal-actions{display:flex;justify-content:flex-end;gap:9px}
.button{height:42px;border-radius:12px;padding:0 16px;border:0;cursor:pointer}
.button.soft{background:#edf2f6;color:#5e6e7f}
.button.primary{background:#172535;color:#fff;box-shadow:0 8px 20px rgba(23,37,53,.14)}
@media(max-height:820px){
  .book-modal{height:min(700px,calc(100vh - 36px));padding:20px 22px 18px;gap:13px}
  .cover-upload-zone{height:300px}
  .file-upload-zone{height:74px}
  .background-upload-zone{height:88px}
  .field textarea{height:72px}
}
@media(max-width:900px){
  .book-modal{width:min(760px,calc(100vw - 32px));height:min(760px,calc(100vh - 28px));overflow:hidden}
  .book-form-grid{grid-template-columns:220px 1fr;gap:14px}
  .cover-upload-zone{height:300px}
  .background-settings{grid-template-columns:1fr}
}
@media(max-width:700px){
  .book-modal{height:calc(100vh - 20px);padding:16px;overflow:auto}
  .book-form-grid{grid-template-columns:1fr}
  .cover-upload-zone{height:210px}
  .book-fields,.upload-grid{grid-template-columns:1fr}
  .background-settings{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr 1fr}
}

.toast{position:fixed;right:24px;bottom:24px;z-index:30;background:#172535;color:#fff;border-radius:13px;padding:11px 14px;font-size:12px;opacity:0;transform:translateY(8px);pointer-events:none;transition:.22s}
.toast.show{opacity:1;transform:none}
body.is-owner .intro-add{display:inline-flex}
body.is-owner .empty-add{display:inline-flex;margin:16px auto 0}
@keyframes ringMove{to{transform:translate3d(36px,-22px,0) rotate(13deg);filter:hue-rotate(20deg)}}
@keyframes glowMove{to{transform:translate3d(-28px,18px,0) scale(1.07);filter:blur(20px) hue-rotate(18deg)}}
@media(max-height:760px){
  .books-main{padding-top:18px;gap:10px}
  .books-intro h1{font-size:58px;margin:11px 0 9px}
  .books-intro p{font-size:14px}
  .shelf-scene{height:315px}
  .books-row{bottom:66px;height:215px}
  .book{height:188px;width:78px}
  .book:nth-child(3n+2){height:202px}.book:nth-child(4n+3){height:178px}
  .book-title{font-size:12px;max-height:135px}
}
@media(max-width:900px){
  .books-app{padding:14px 18px 20px}
  .page-nav{display:none}
  .books-main{padding-top:20px}
  .books-intro h1{font-size:60px}
  .books-intro{align-items:start}
  .books-intro p{max-width:470px}
  .books-meta>span{display:none}
}
@media(max-width:620px){
  .books-app{padding:10px 12px 14px}
  .books-header{height:54px}
  .books-main{height:calc(100% - 54px);padding-top:16px}
  .books-intro h1{font-size:48px}
  .books-intro p{font-size:13px;max-width:320px}
  .eyebrow{font-size:10px}
  .intro-add{display:none!important}
  .shelf-scene{width:100%;height:330px}
  .books-row{left:0;right:0;padding:0 12px;gap:5px;overflow:hidden}
  .book{width:58px}
  .empty-state{width:82%;top:46%}
  .empty-state h2{font-size:23px}
}