/* =========================================================
   E-LIBRARY — Design tokens
   Palet: kertas hangat + teal klinis + aksen kuning tembaga (stempel/pita buku)
   Tipografi: Source Serif 4 (judul, nuansa buku) + Inter (UI, keterbacaan klinis)
========================================================= */
:root{
  --bg: #F6F3EC;
  --paper: #FFFFFF;
  --ink: #17302C;
  --ink-soft: #52645F;
  --ink-faint: #8B968F;
  --line: #DED6C3;
  --primary: #0E6B63;
  --primary-dark: #0A4E48;
  --primary-tint: #E4EFEC;
  --accent: #C08324;
  --accent-tint: #F6E9D2;
  --danger: #AA4430;
  --radius-s: 4px;
  --radius-m: 8px;
  --font-display: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --maxw: 1120px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-ui);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;margin:0 0 .4em;color:var(--ink);}
p{margin:0 0 1em;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
@media (prefers-reduced-motion: reduce){ *{animation:none !important;transition:none !important;} }

/* ---------- Header ---------- */
.site-header{
  background:var(--paper);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:40;
}
.site-header .wrap{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;gap:24px;
}
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:42px;height:42px;border-radius:var(--radius-s);
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:700;font-size:19px;
  flex:none;
}
.brand-text{line-height:1.2;}
.brand-text strong{display:block;font-family:var(--font-display);font-size:18px;letter-spacing:.2px;}
.brand-text span{display:block;font-size:12.5px;color:var(--ink-soft);}
.main-nav{display:flex;align-items:center;gap:28px;}
.main-nav a{font-size:14.5px;color:var(--ink-soft);padding:6px 0;border-bottom:2px solid transparent;}
.main-nav a:hover{color:var(--primary);}
.main-nav a[aria-current="page"]{color:var(--primary);border-color:var(--accent);font-weight:600;}
.btn-admin{
  border:1px solid var(--primary);color:var(--primary);
  padding:9px 16px;border-radius:var(--radius-s);font-size:14px;font-weight:600;
  white-space:nowrap;
}
.btn-admin:hover{background:var(--primary);color:#fff;}
.nav-toggle{display:none;background:none;border:0;font-size:24px;color:var(--ink);}

@media (max-width:860px){
  .main-nav{
    position:fixed;inset:72px 0 0 0;background:var(--paper);
    flex-direction:column;align-items:flex-start;padding:24px;gap:6px;
    transform:translateX(100%);transition:transform .25s ease;
    border-top:1px solid var(--line);
  }
  .main-nav.open{transform:translateX(0);}
  .main-nav a{width:100%;padding:12px 4px;border-bottom:1px solid var(--line);}
  .nav-toggle{display:block;}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-s);font-size:14.5px;font-weight:600;
  border:1px solid transparent;line-height:1;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);}
.btn-outline{background:transparent;border-color:var(--line);color:var(--ink);}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:#a56e1c;}
.btn-danger{background:transparent;color:var(--danger);border-color:#e4c9c0;}
.btn-danger:hover{background:#fbeeea;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.55;pointer-events:none;}

/* ---------- Hero (motif kartu katalog perpustakaan) ---------- */
.hero{background:var(--primary);color:#fff;padding:56px 0 72px;}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;}
.hero-eyebrow{color:var(--accent-tint);font-size:14px;margin:0 0 14px;font-weight:600;}
.hero h1{color:#fff;font-size:clamp(28px,3.6vw,42px);line-height:1.18;max-width:16ch;}
.hero p.lede{color:#DCEAE7;font-size:16.5px;max-width:46ch;margin-bottom:26px;}
.search-box{
  background:#fff;border-radius:var(--radius-m);padding:6px;
  display:flex;gap:6px;max-width:520px;box-shadow:0 12px 30px -12px rgba(0,0,0,.35);
}
.search-box input{
  flex:1;border:0;padding:12px 14px;font-size:15px;font-family:inherit;color:var(--ink);border-radius:var(--radius-s);
}
.search-box input:focus{outline:none;}
.search-box button{
  background:var(--accent);color:#fff;border:0;padding:0 20px;border-radius:var(--radius-s);font-weight:600;font-size:14.5px;
}
.popular-tags{margin-top:16px;font-size:13.5px;color:#CFE4E0;display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.popular-tags a{border:1px solid rgba(255,255,255,.35);padding:5px 12px;border-radius:20px;color:#fff;}
.popular-tags a:hover{background:rgba(255,255,255,.15);}

/* kartu katalog dekoratif */
.catalog-card{
  background:var(--paper);color:var(--ink);border-radius:var(--radius-m);
  padding:26px 26px 22px;position:relative;
  border:1px dashed #C7DAD7;
  transform:rotate(1.4deg);
  box-shadow:0 24px 46px -20px rgba(0,0,0,.45);
}
.catalog-card::before{
  content:"KARTU KATALOG";
  position:absolute;top:-11px;left:22px;background:var(--accent);color:#fff;
  font-size:11px;letter-spacing:.06em;padding:3px 10px;border-radius:3px;font-weight:700;
}
.catalog-row{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-faint);border-bottom:1px solid var(--line);padding:7px 0;}
.catalog-row strong{color:var(--ink);font-weight:600;}
.catalog-title{font-family:var(--font-display);font-size:19px;margin:14px 0 4px;}
.catalog-sub{font-size:13px;color:var(--ink-soft);margin-bottom:14px;}

/* ---------- Sections ---------- */
.section{padding:52px 0;}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:22px;gap:16px;}
.section-head h2{font-size:24px;}
.section-head .muted{color:var(--ink-soft);font-size:14px;margin:0;}
.link-more{font-size:14px;font-weight:600;color:var(--primary);white-space:nowrap;}
.link-more:hover{color:var(--primary-dark);}

.layout-with-side{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:flex-start;}
@media (max-width:900px){.layout-with-side{grid-template-columns:1fr;}}

/* ---------- Book grid & card ---------- */
.book-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
@media (max-width:960px){.book-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.book-grid{grid-template-columns:1fr 1fr;gap:12px;}}

.book-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);
  overflow:hidden;display:flex;flex-direction:column;height:100%;
}
.book-cover{
  aspect-ratio:3/4;background:var(--primary-tint);
  display:flex;align-items:center;justify-content:center;overflow:hidden;
  color:var(--primary);font-family:var(--font-display);font-size:13px;text-align:center;padding:10px;
}
.book-cover img{width:100%;height:100%;object-fit:cover;}
.book-body{padding:14px 14px 16px;display:flex;flex-direction:column;gap:6px;flex:1;}
.call-tag{
  align-self:flex-start;font-size:11px;font-weight:700;letter-spacing:.03em;
  color:var(--accent);background:var(--accent-tint);padding:2px 8px;border-radius:3px;
}
.book-title{font-family:var(--font-display);font-size:15.5px;line-height:1.3;margin:2px 0 0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.book-author{font-size:12.5px;color:var(--ink-soft);}
.book-meta-row{margin-top:auto;padding-top:10px;display:flex;justify-content:space-between;align-items:center;font-size:11.5px;color:var(--ink-faint);border-top:1px solid var(--line);}

/* ---------- Sidebar widgets ---------- */
.widget{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);padding:20px;margin-bottom:20px;}
.widget h3{font-size:14.5px;text-transform:none;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line);}
.stat-row{display:flex;justify-content:space-between;padding:8px 0;font-size:14px;color:var(--ink-soft);}
.stat-row b{color:var(--ink);font-family:var(--font-display);font-size:17px;}
.pop-item{display:flex;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);}
.pop-item:last-child{border-bottom:0;}
.pop-item .pop-cover{width:36px;height:48px;flex:none;background:var(--primary-tint);border-radius:3px;overflow:hidden;}
.pop-item .pop-cover img{width:100%;height:100%;object-fit:cover;}
.pop-item .pop-info{font-size:13px;}
.pop-item .pop-info .t{font-weight:600;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.pop-item .pop-info .a{color:var(--ink-faint);font-size:11.5px;}
.cat-list a{display:flex;justify-content:space-between;padding:8px 0;font-size:14px;color:var(--ink-soft);border-bottom:1px solid var(--line);}
.cat-list a:last-child{border-bottom:0;}
.cat-list a:hover{color:var(--primary);}
.cat-list .count{color:var(--ink-faint);font-size:12.5px;}

/* ---------- Filter / search bar (halaman koleksi) ---------- */
.filter-bar{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:16px;display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px;
}
.filter-bar input[type=text],
.filter-bar select{
  border:1px solid var(--line);border-radius:var(--radius-s);padding:10px 12px;font-size:14px;font-family:inherit;background:#fff;
}
.filter-bar input[type=text]{flex:1;min-width:200px;}

.page-title-block{padding:36px 0 8px;}
.page-title-block h1{font-size:28px;}
.page-title-block .muted{color:var(--ink-soft);}

.pagination{display:flex;gap:8px;justify-content:center;margin-top:32px;flex-wrap:wrap;}
.pagination button{
  min-width:38px;height:38px;border:1px solid var(--line);background:#fff;border-radius:var(--radius-s);font-size:14px;
}
.pagination button[aria-current="true"]{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:700;}
.pagination button:disabled{opacity:.4;}

.empty-state{
  text-align:center;padding:56px 20px;color:var(--ink-soft);
  border:1px dashed var(--line);border-radius:var(--radius-m);background:var(--paper);
}
.empty-state h3{margin-bottom:6px;}

/* ---------- Kategori grid page ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
@media (max-width:760px){.cat-grid{grid-template-columns:1fr 1fr;}}
.cat-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);padding:22px;}
.cat-card .call-tag{margin-bottom:10px;}
.cat-card h3{font-size:17px;margin-bottom:4px;}
.cat-card .muted{font-size:13px;color:var(--ink-soft);}

/* ---------- Detail buku ---------- */
.detail-grid{display:grid;grid-template-columns:260px 1fr;gap:36px;}
@media (max-width:760px){.detail-grid{grid-template-columns:1fr;}}
.detail-cover{
  aspect-ratio:3/4;background:var(--primary-tint);border-radius:var(--radius-m);overflow:hidden;
  display:flex;align-items:center;justify-content:center;color:var(--primary);font-family:var(--font-display);
  border:1px solid var(--line);
}
.detail-cover img{width:100%;height:100%;object-fit:cover;}
.detail-actions{display:flex;gap:10px;margin:20px 0 24px;flex-wrap:wrap;}
.meta-table{width:100%;border-collapse:collapse;margin:18px 0 22px;font-size:14px;}
.meta-table tr{border-bottom:1px solid var(--line);}
.meta-table td{padding:8px 0;color:var(--ink-soft);}
.meta-table td:first-child{width:150px;color:var(--ink-faint);}
.pdf-frame{width:100%;height:70vh;border:1px solid var(--line);border-radius:var(--radius-m);background:#fff;}

/* ---------- Forms (login & admin) ---------- */
.auth-shell{min-height:calc(100vh - 72px - 200px);display:flex;align-items:center;justify-content:center;padding:48px 20px;}
.auth-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);padding:36px 32px;width:100%;max-width:380px;}
.auth-card h1{font-size:22px;margin-bottom:6px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink-soft);margin-bottom:6px;}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--radius-s);padding:10px 12px;font-size:14.5px;font-family:inherit;background:#fff;color:var(--ink);
}
.field textarea{resize:vertical;min-height:100px;}
.form-msg{font-size:13.5px;padding:10px 12px;border-radius:var(--radius-s);margin-bottom:14px;}
.form-msg.error{background:#FBEEEA;color:var(--danger);}
.form-msg.ok{background:var(--primary-tint);color:var(--primary-dark);}

/* ---------- Admin dashboard ---------- */
.admin-shell{display:grid;grid-template-columns:220px 1fr;min-height:calc(100vh - 72px);}
@media (max-width:760px){.admin-shell{grid-template-columns:1fr;}}
.admin-side{background:var(--paper);border-right:1px solid var(--line);padding:24px 14px;}
.admin-side button{
  display:block;width:100%;text-align:left;padding:11px 14px;border:0;background:transparent;
  border-radius:var(--radius-s);font-size:14.5px;color:var(--ink-soft);margin-bottom:4px;font-weight:600;
}
.admin-side button.active,.admin-side button:hover{background:var(--primary-tint);color:var(--primary-dark);}
.admin-main{padding:32px 28px;}
.admin-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;flex-wrap:wrap;gap:12px;}
.admin-head h1{font-size:22px;margin:0;}

.kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:28px;}
@media (max-width:760px){.kpi-row{grid-template-columns:1fr 1fr;}}
.kpi-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);padding:18px;}
.kpi-card .num{font-family:var(--font-display);font-size:26px;color:var(--primary-dark);}
.kpi-card .lbl{font-size:12.5px;color:var(--ink-soft);}

.data-table{width:100%;border-collapse:collapse;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;}
.data-table th,.data-table td{padding:11px 14px;text-align:left;font-size:13.5px;border-bottom:1px solid var(--line);}
.data-table th{background:var(--primary-tint);color:var(--primary-dark);font-weight:700;font-size:12.5px;text-transform:uppercase;letter-spacing:.03em;}
.data-table tr:last-child td{border-bottom:0;}
.row-actions{display:flex;gap:8px;}
.row-actions button{font-size:12.5px;padding:5px 10px;}
.table-scroll{overflow-x:auto;}
.table-wrap{margin-bottom:34px;}

.modal-backdrop{
  position:fixed;inset:0;background:rgba(23,48,44,.45);display:flex;align-items:flex-start;justify-content:center;
  padding:40px 16px;overflow-y:auto;z-index:100;
}
.modal-card{background:#fff;border-radius:var(--radius-m);padding:28px;max-width:560px;width:100%;}
.modal-card h2{font-size:19px;margin-bottom:18px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 14px;}
.form-grid .field.full{grid-column:1/-1;}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:8px;}
.hint{font-size:12px;color:var(--ink-faint);margin-top:4px;}
.badge-cat{font-size:11px;background:var(--primary-tint);color:var(--primary-dark);padding:3px 8px;border-radius:3px;font-weight:600;}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#C9D6D2;padding:34px 0;margin-top:20px;}
.site-footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:13px;}
.site-footer strong{color:#fff;}

.spinner{width:22px;height:22px;border:2.5px solid var(--line);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite;margin:30px auto;}
@keyframes spin{to{transform:rotate(360deg);}}
.center-note{text-align:center;color:var(--ink-soft);font-size:14px;padding:24px;}