:root {
  --bg: #FFF8F0;
  --paper: #FFFFFF;
  --ink: #3B2F2F;
  --muted: #8A7B74;
  --line: #F0E3D6;
  --pink: #F4A6B8;
  --pink-d: #D9708E;
  --sage: #A8C3A0;
  --sky: #A9CFE8;
  --sun: #F7D488;
  --danger: #C8553D;
  --radius: 18px;
  --shadow: 0 2px 4px rgba(59, 47, 47, .05), 0 8px 24px rgba(59, 47, 47, .07);
  --font-head: 'Fredoka', 'Nunito', system-ui, sans-serif;
  --font-body: 'Nunito', system-ui, -apple-system, 'Segoe UI', sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 var(--font-body); }
a { color: var(--pink-d); }
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }
.wrap { width: min(1200px, 100% - 32px); margin-inline: auto; }
.wrap.narrow { width: min(760px, 100% - 32px); }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 48px 0 64px; text-align: center;
  background: radial-gradient(circle at 15% 30%, #FFE3EA 0 120px, transparent 121px),
              radial-gradient(circle at 88% 20%, #E3F1FA 0 90px, transparent 91px),
              radial-gradient(circle at 75% 95%, #FDF0CC 0 110px, transparent 111px), var(--bg); }
.hero .eyebrow { margin: 0; font: 600 14px var(--font-head); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.hero h1 { margin: 4px 0 6px; font: 600 clamp(40px, 8vw, 72px)/1.05 var(--font-head); color: var(--pink-d); }
.hero h1 .star { display: inline-block; color: var(--sun); transform: translateY(-.2em) rotate(12deg); font-size: .55em; }
.hero .sub { margin: 0; color: var(--muted); font-weight: 600; }

/* ---------- controls ---------- */
.controls { position: sticky; top: 0; z-index: 5; margin-top: -32px; padding: 16px; background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-radius: var(--radius); box-shadow: var(--shadow); }
.search { position: relative; }
.search svg { position: absolute; left: 14px; top: 50%; translate: 0 -50%; width: 20px; height: 20px; color: var(--muted); }
.search input { width: 100%; padding: 12px 14px 12px 44px; border: 2px solid var(--line); border-radius: 999px; background: var(--bg); font-size: 17px; outline: none; }
.search input:focus { border-color: var(--pink); background: #fff; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 12px; }
.row select { padding: 8px 34px 8px 14px; border: 2px solid var(--line); border-radius: 999px; background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238A7B74' stroke-width='2' fill='none'/%3E%3C/svg%3E") no-repeat right 12px center;
  appearance: none; -webkit-appearance: none; cursor: pointer; max-width: 100%; }
.row .spacer { flex: 1; }
.view-toggle { display: inline-flex; border: 2px solid var(--line); border-radius: 999px; overflow: hidden; }
.view-toggle button { border: 0; background: #fff; padding: 6px 12px; cursor: pointer; color: var(--muted); display: grid; place-items: center; }
.view-toggle button.on { background: var(--pink); color: #fff; }
.view-toggle svg { width: 18px; height: 18px; }
.link-btn { border: 0; background: none; color: var(--pink-d); font-weight: 700; cursor: pointer; padding: 6px 4px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chip { border: 2px solid var(--line); background: #fff; border-radius: 999px; padding: 5px 12px; font-size: 14px; font-weight: 700; cursor: pointer; color: var(--ink); }
.chip .n { color: var(--muted); font-weight: 600; margin-left: 4px; }
.chip.on { background: var(--sage); border-color: var(--sage); color: #fff; }
.chip.on .n { color: rgba(255, 255, 255, .85); }
.chip:focus-visible, .btn:focus-visible, .card-book:focus-visible { outline: 3px solid var(--sky); outline-offset: 2px; }

.status { color: var(--muted); font-weight: 600; margin: 20px 4px 8px; }

/* ---------- books ---------- */
.books.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 22px 18px; padding-bottom: 40px; }
.card-book { display: flex; flex-direction: column; gap: 8px; padding: 0; border: 0; background: none; text-align: left; cursor: pointer; }
.card-book .cover, .card-book .cover-ph { width: 100%; aspect-ratio: 2 / 3; border-radius: 10px 14px 14px 10px; box-shadow: var(--shadow); transition: transform .15s ease; }
.card-book:hover .cover, .card-book:hover .cover-ph { transform: translateY(-4px) rotate(-1deg); }
.card-book .t { font: 600 16px/1.25 var(--font-head); }
.card-book .a { font-size: 14px; color: var(--muted); }
.tag-mini { display: flex; flex-wrap: wrap; gap: 4px; }
.tag-mini span { font-size: 11px; font-weight: 700; padding: 1px 8px; border-radius: 999px; background: #FDE8EE; color: var(--pink-d); }

.cover { object-fit: cover; background: #f3ece6; display: block; }
.cover-ph { display: grid; place-items: center; padding: 12px; background: var(--ph, var(--pink));
  background-image: linear-gradient(90deg, rgba(0, 0, 0, .08) 0 6px, transparent 6px); color: #fff; text-align: center; }
.cover-ph span { font: 600 15px/1.2 var(--font-head); text-shadow: 0 1px 2px rgba(0, 0, 0, .15); display: -webkit-box; -webkit-line-clamp: 5; -webkit-box-orient: vertical; overflow: hidden; }

.books.list { display: flex; flex-direction: column; gap: 10px; padding-bottom: 40px; }
.books.list .card-book { flex-direction: row; align-items: center; gap: 14px; background: #fff; padding: 10px; border-radius: 14px; box-shadow: var(--shadow); }
.books.list .card-book .cover, .books.list .card-book .cover-ph { width: 54px; flex: none; }
.books.list .card-book .cover-ph span { font-size: 9px; }
.books.list .card-book:hover .cover, .books.list .card-book:hover .cover-ph { transform: none; }
.books.list .meta { display: flex; flex-direction: column; gap: 3px; min-width: 0; }

.empty { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty .big { font: 600 22px var(--font-head); color: var(--ink); margin-bottom: 4px; }

/* ---------- detail dialog ---------- */
dialog.detail { width: min(720px, 100% - 24px); max-height: calc(100dvh - 32px); border: 0; border-radius: 22px; padding: 0; box-shadow: 0 20px 60px rgba(59, 47, 47, .3); color: var(--ink); }
dialog.detail::backdrop { background: rgba(59, 47, 47, .45); }
.detail-in { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 24px; }
.detail-in .cover, .detail-in .cover-ph { width: 100%; aspect-ratio: 2 / 3; border-radius: 10px 14px 14px 10px; box-shadow: var(--shadow); }
.detail-in h2 { margin: 0; font: 600 28px/1.15 var(--font-head); }
.detail-in .subt { margin: 4px 0 0; color: var(--muted); font-weight: 600; }
.detail-in .by { margin: 10px 0 0; font-weight: 700; }
.detail-in .desc { margin: 14px 0 0; white-space: pre-line; }
.facts { display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; margin: 16px 0 0; font-size: 14px; }
.facts dt { color: var(--muted); font-weight: 700; }
.facts dd { margin: 0; }
.close-x { position: absolute; top: 10px; right: 10px; width: 36px; height: 36px; border-radius: 50%; border: 0; background: var(--bg); cursor: pointer; font-size: 20px; line-height: 1; }
@media (max-width: 560px) {
  .detail-in { grid-template-columns: 1fr; }
  .detail-in .cover, .detail-in .cover-ph { width: 150px; margin: 0 auto; }
  .books.grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 18px 14px; }
}

footer.foot { text-align: center; padding: 24px 0 40px; font-size: 14px; color: var(--muted); }

/* ---------- admin ---------- */
.topbar { background: #fff; box-shadow: var(--shadow); }
.topbar .wrap { display: flex; align-items: center; gap: 12px; padding: 14px 0; }
.brand { font: 600 22px var(--font-head); color: var(--pink-d); text-decoration: none; }
.badge { font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; background: var(--sun); padding: 2px 10px; border-radius: 999px; }
.topbar .spacer { flex: 1; }
.card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; margin-top: 20px; }
.card h2 { margin: 0 0 6px; font: 600 24px var(--font-head); }
.muted { color: var(--muted); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 2px solid transparent; border-radius: 999px; padding: 10px 18px; font-weight: 800; cursor: pointer; background: var(--sky); color: #23415a; }
.btn svg { width: 20px; height: 20px; }
.btn.primary { background: var(--pink-d); color: #fff; }
.btn.ghost { background: #fff; border-color: var(--line); color: var(--ink); }
.btn.danger { background: #fff; border-color: #F2C9BF; color: var(--danger); }
.btn.danger.armed { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.big { width: 100%; padding: 16px; font-size: 18px; }
.btn.sm { padding: 6px 12px; font-size: 14px; }
.btn:disabled { opacity: .55; cursor: default; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field label, .lbl { font-size: 13px; font-weight: 800; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.input, .field input, .field textarea { width: 100%; border: 2px solid var(--line); border-radius: 12px; padding: 10px 12px; background: var(--bg); outline: none; }
.input:focus, .field input:focus, .field textarea:focus { border-color: var(--pink); background: #fff; }
.pin-row, .isbn-row { display: flex; gap: 10px; margin-top: 14px; }
.pin-row input, .isbn-row input { flex: 1; min-width: 0; font-size: 18px; letter-spacing: .05em; }
.msg { min-height: 1.5em; margin: 10px 0 0; font-weight: 700; color: var(--muted); }
.msg.err { color: var(--danger); }
.msg.ok { color: #4f7a47; }

.tabs { display: flex; gap: 6px; margin-top: 20px; background: #fff; padding: 6px; border-radius: 999px; box-shadow: var(--shadow); }
.tabs button { flex: 1; border: 0; background: none; padding: 10px; border-radius: 999px; font-weight: 800; cursor: pointer; color: var(--muted); }
.tabs button.on { background: var(--pink); color: #fff; }

.scanner { position: relative; margin-bottom: 14px; border-radius: 14px; overflow: hidden; background: #000; aspect-ratio: 4 / 3; }
.scanner video { width: 100%; height: 100%; object-fit: cover; display: block; }
.scan-frame { position: absolute; inset: 30% 10%; border: 3px solid rgba(255, 255, 255, .9); border-radius: 12px; box-shadow: 0 0 0 999px rgba(0, 0, 0, .35); pointer-events: none; }
.scan-frame::after { content: ''; position: absolute; left: 6%; right: 6%; top: 50%; height: 2px; background: #ff5c7a; box-shadow: 0 0 8px #ff5c7a; animation: scanline 1.6s ease-in-out infinite alternate; }
@keyframes scanline { from { top: 15%; } to { top: 85%; } }
.scanner .stop { position: absolute; bottom: 10px; left: 50%; translate: -50% 0; }
.scan-hint { position: absolute; top: 10px; left: 0; right: 0; text-align: center; color: #fff; font-weight: 700; font-size: 14px; text-shadow: 0 1px 3px rgba(0, 0, 0, .6); }

.preview { display: grid; grid-template-columns: 150px 1fr; gap: 20px; }
.preview .cover, .preview .cover-ph { width: 100%; aspect-ratio: 2 / 3; border-radius: 8px 12px 12px 8px; box-shadow: var(--shadow); }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.fields .full { grid-column: 1 / -1; }
@media (max-width: 600px) {
  .preview { grid-template-columns: 1fr; }
  .preview .cover-slot { width: 130px; margin: 0 auto; }
  .fields { grid-template-columns: 1fr; }
}
.form-sec { margin-top: 18px; display: flex; flex-direction: column; gap: 8px; }
.form-sec .chips { margin-top: 0; }
details.more summary { cursor: pointer; font-weight: 800; color: var(--muted); margin-top: 18px; }
details.more .field { margin-top: 10px; }
.actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; flex-wrap: wrap; }

.manage-list { list-style: none; margin: 14px 0 40px; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.manage-list li { display: flex; align-items: center; gap: 12px; background: #fff; padding: 10px; border-radius: 14px; box-shadow: var(--shadow); }
.manage-list .cover, .manage-list .cover-ph { width: 44px; flex: none; aspect-ratio: 2 / 3; border-radius: 4px 6px 6px 4px; }
.manage-list .cover-ph span { font-size: 7px; }
.manage-list .meta { flex: 1; min-width: 0; }
.manage-list .meta .t { font-weight: 800; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.manage-list .meta .a { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.manage-list .btns { display: flex; gap: 6px; flex: none; }

.toast { position: fixed; left: 50%; bottom: 24px; translate: -50% 20px; opacity: 0; pointer-events: none; background: var(--ink); color: #fff; padding: 12px 20px; border-radius: 999px; font-weight: 700; transition: .25s; z-index: 50; max-width: calc(100% - 32px); text-align: center; }
.toast.show { opacity: 1; translate: -50% 0; }
.toast.err { background: var(--danger); }