:root{
  --bg:#0b0c10;
  --panel:#12141b;
  --panel2:#0f1117;
  --text:#e8eaf0;
  --muted:#a7afc2;
  --line:#23283a;
  --btn:#2a6cff;
  --btn2:#1b2236;
  --good:#42d392;
  --warn:#f5c451;
  --bad:#ff5c5c;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: radial-gradient(1000px 700px at 20% 0%, #141a2b, var(--bg));
  color:var(--text);
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 18px;
  border-bottom:1px solid var(--line);
  background: rgba(10,12,18,0.7);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand{font-weight:800; letter-spacing:0.3px}
.controls{display:flex; gap:10px; align-items:center; flex-wrap:wrap}
.field{display:flex; gap:8px; align-items:center; color:var(--muted); font-size:14px}
select{
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
}

.btn{
  border: 1px solid var(--line);
  background: var(--btn);
  color: white;
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
}
.btn.secondary{
  background: var(--btn2);
  color: var(--text);
}
.btn:active{transform: translateY(1px)}

.layout{
  display:grid;
  grid-template-columns: 360px 1fr;
  gap:14px;
  padding:14px;
}

.panel, .preview{
  background: rgba(18,20,27,0.8);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow:hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
}

.panelHead, .previewHead{
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(15,17,23,0.7);
}
.panelHead{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:10px;
}
h2{margin:0; font-size:16px}
.stats{color:var(--muted); font-size:13px}
.sub{color:var(--muted); font-size:13px; margin-top:6px}

.photoList{
  list-style:none;
  margin:0;
  padding: 10px;
  display:flex;
  flex-direction:column;
  gap:10px;
  max-height: calc(100vh - 220px);
  overflow:auto;
}

.thumb{
  display:grid;
  grid-template-columns: 72px 1fr;
  gap:10px;
  padding:10px;
  border:1px solid var(--line);
  border-radius:16px;
  background: rgba(15,17,23,0.7);
}
.thumb img{
  width:72px; height:72px;
  object-fit:cover;
  border-radius:12px;
  border:1px solid var(--line);
}

.tools{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
}
.miniBtn{
  background: rgba(27,34,54,0.9);
  border:1px solid var(--line);
  color: var(--text);
  border-radius: 10px;
  padding:6px 8px;
  cursor:pointer;
  font-weight:700;
}
.miniBtn.danger{border-color: rgba(255,92,92,0.6)}
.miniSelect{
  background: rgba(27,34,54,0.9);
  border:1px solid var(--line);
  color: var(--text);
  border-radius: 10px;
  padding:6px 8px;
}

.metaRow{
  margin-top:6px;
  font-size: 12px;
  color: var(--muted);
  display:flex;
  justify-content:space-between;
  gap:10px;
}
.badge{
  padding:3px 8px;
  border-radius: 999px;
  font-weight:800;
  font-size: 12px;
  border: 1px solid var(--line);
}
.badge.good{color: var(--good); border-color: rgba(66,211,146,0.4)}
.badge.warn{color: var(--warn); border-color: rgba(245,196,81,0.4)}
.badge.bad{color: var(--bad); border-color: rgba(255,92,92,0.4)}

.hint{
  padding: 10px 14px 14px;
  color: var(--muted);
  font-size: 12px;
}

.preview{
  padding-bottom: 14px;
}
.bookWrap{
  padding: 12px;
  display:flex;
  justify-content:center;
}
.book{
  width: 900px;
  height: 600px;
  border-radius: 18px;
}
.nav{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  padding: 0 14px 14px;
}
.pageIndicator{color: var(--muted); font-weight: 700}

/* Page DOM used by PageFlip */
.page{
  width: 420px;   /* preview size only */
  height: 594px;  /* A4 ratio */
  background: white;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}
.pageInner{
  height: 100%;
  padding: 12px;
  display: grid;
  gap: 10px;
}
.grid-1{ grid-template-columns: 1fr; grid-template-rows: 1fr; }
.grid-2{ grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
.grid-3{ grid-template-columns: 1fr; grid-template-rows: 1fr 1fr 1fr; }
.grid-4{ grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }

.slot{
  background: #f0f0f0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.08);
  position: relative;
}
.slot img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform-origin: center;
  display:block;
}
.slot.contain img{ object-fit: contain; background: white; }
.pageNum{
  position:absolute;
  bottom: 10px;
  right: 12px;
  color: rgba(0,0,0,0.45);
  font-size: 12px;
  font-weight: 700;
}

/* PRINT */
#printArea{
  display:none;
}

/* A4 print layout */
@media print {
  body{ background: white; color: black; }
  header, main{ display:none !important; }

  #printArea{
    display:block;
    padding:0;
    margin:0;
  }

  .printPage{
    width: 210mm;
    height: 297mm;
    page-break-after: always;
    background: white;
    overflow: hidden;
  }

  .printInner{
    height: 100%;
    padding: 10mm; /* margins */
    display:grid;
    gap: 6mm;
  }

  .printInner.grid-1{ grid-template-columns: 1fr; grid-template-rows: 1fr; }
  .printInner.grid-2{ grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
  .printInner.grid-3{ grid-template-columns: 1fr; grid-template-rows: 1fr 1fr 1fr; }
  .printInner.grid-4{ grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }

  .printSlot{
    border-radius: 4mm;
    overflow:hidden;
    border: 0.2mm solid rgba(0,0,0,0.15);
    background: #f4f4f4;
  }
  .printSlot img{
    width:100%;
    height:100%;
    object-fit: cover;
    transform-origin:center;
    display:block;
  }
  .printSlot.contain img{ object-fit: contain; background: white; }
}