:root{
  --bg:#0b1220;
  --card:rgba(255,255,255,.08);
  --card2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.12);
  --text:rgba(255,255,255,.92);
  --muted:rgba(255,255,255,.65);
  --shadow:0 18px 50px rgba(0,0,0,.35);
  --radius:18px;
}

*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0;
  background:
    radial-gradient(1200px 700px at 10% -10%, rgba(59,130,246,.35), transparent 60%),
    radial-gradient(900px 600px at 95% 0%, rgba(16,185,129,.22), transparent 65%),
    radial-gradient(700px 600px at 50% 100%, rgba(168,85,247,.18), transparent 60%),
    var(--bg);
  color:var(--text);
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
}

/* ===== Topbar ===== */
.topbar{
  position:sticky; top:0; z-index:50;
  backdrop-filter:blur(14px);
  background:rgba(11,18,32,.55);
  border-bottom:1px solid var(--line);
}

.brand-logo{
  width:42px;height:42px;
  border-radius:12px;
  object-fit:contain;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.08);
  padding:4px;
}
.brand-title{font-weight:800}
.brand-subtitle{font-size:.86rem;color:var(--muted)}

/* ===== Layout container ===== */
.main{padding:16px 0 22px}

.panel{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(180deg,var(--card),var(--card2));
  box-shadow:var(--shadow);
  overflow:hidden;
}
.panel-head,.panel-foot{
  padding:10px 12px;
  border-bottom:1px solid var(--line);
}
.panel-foot{border-top:1px solid var(--line);border-bottom:none}
.panel-body{padding:12px;position:relative}
.viewer-wrap{min-height:720px}

/* ===== Two columns (sidebar + viewer) ===== */
.layout{
  display:grid;
  grid-template-columns:320px 1fr;
  gap:12px;
}
@media(max-width:992px){
  .layout{grid-template-columns:1fr}
  .sidebar{order:2}
}

/* ===== Sidebar ===== */
.sidebar{
  border:1px solid rgba(255,255,255,.14);
  border-radius:16px;
  background:rgba(0,0,0,.22);
  overflow:hidden;
  min-height:640px;
}

.side-head{
  padding:10px;
  border-bottom:1px solid rgba(255,255,255,.12);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:8px;
}
.side-title{font-weight:800}
.badge-mini{
  font-size:.72rem;
  padding:3px 8px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.12);
  color:var(--muted);
}

.side-body{
  padding:10px;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.search{
  display:flex;
  gap:8px;
  align-items:center;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.06);
  border-radius:12px;
  padding:8px 10px;
}
.search input{
  border:none;outline:none;
  background:transparent;
  color:var(--text);
  width:100%;
}

.section{display:flex;flex-direction:column;gap:6px}
.section h6{margin:0;font-size:.85rem;color:var(--muted)}

.list{
  border:1px solid rgba(255,255,255,.12);
  border-radius:14px;
  overflow:hidden;
  background:rgba(0,0,0,.18);
}
.list-scroll{max-height:260px;overflow:auto}

@media(max-width:992px){
  .list-scroll{max-height:220px}
}

.list-item{
  padding:10px;
  display:flex;
  gap:10px;
  justify-content:space-between;
  align-items:flex-start;
  border-bottom:1px solid rgba(255,255,255,.08);
  cursor:pointer;
}
.list-item:last-child{border-bottom:none}
.list-item:hover{background:rgba(255,255,255,.06)}
.list-item.active{background:rgba(59,130,246,.16)}
.list-item .meta{min-width:0}
.list-item .title{
  font-weight:800;
  font-size:.95rem;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.list-item .sub{font-size:.78rem;color:var(--muted);margin-top:2px}
.list-item .actions{display:flex;gap:6px;align-items:center;flex:0 0 auto}

/* ===== Toolbar pills ===== */
.page-pill,.zoom-pill{
  display:flex;
  align-items:center;
  gap:8px;
  padding:7px 10px;
  border:1px solid rgba(255,255,255,.14);
  border-radius:999px;
  background:rgba(255,255,255,.06);
}
.page-input{
  width:86px;
  padding:4px 8px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(0,0,0,.15);
  color:var(--text);
  outline:none;
}

/* ===== Viewer ===== */
.book-shell{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  min-height:640px;
  position:relative;
}

.book-wrap{
  width:min(1180px,100%);
  position:relative;
}

.book{
  width:100%;
  aspect-ratio:16/10;
  border-radius:22px;
  border:1px solid rgba(255,255,255,.14);
  background:
    radial-gradient(700px 280px at 50% 40%, rgba(255,255,255,.10), transparent 60%),
    rgba(0,0,0,.25);
  box-shadow:0 30px 70px rgba(0,0,0,.35);
  display:flex;
  overflow:hidden;
  position:relative;

  /* penting untuk HP: tetap bisa scroll vertikal & pinch */
  touch-action: pan-y pinch-zoom;
}

.page{
  width:50%;
  height:100%;
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:14px;
}
.page.left{border-right:1px solid rgba(255,255,255,.10)}

.page canvas{
  max-width:100%;
  max-height:100%;
  border-radius:16px;
  background:#fff;
  box-shadow:0 18px 40px rgba(0,0,0,.35);
}

.page-label{
  position:absolute;
  bottom:10px;
  right:12px;
  font-size:.85rem;
  color:rgba(0,0,0,.65);
  background:rgba(255,255,255,.72);
  padding:5px 10px;
  border-radius:999px;
  border:1px solid rgba(0,0,0,.08);
}

/* ===== Nav arrows ===== */
.nav-btn{
  position:absolute;top:50%;transform:translateY(-50%);
  width:46px;height:46px;
  display:flex;align-items:center;justify-content:center;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(0,0,0,.35);
  color:#fff;
  cursor:pointer;
  backdrop-filter:blur(8px);
  z-index:5;
}
.nav-btn:hover{background:rgba(0,0,0,.5)}
.nav-btn:disabled{opacity:.35;cursor:not-allowed}
.nav-left{left:-10px}
.nav-right{right:-10px}
@media(max-width:576px){
  .nav-left{left:6px}
  .nav-right{right:6px}
}

.hint{margin-top:10px;color:var(--muted);font-size:.9rem;text-align:center}

/* ===== Loading & Error overlay ===== */
.loading{
  position:absolute;inset:12px;
  border-radius:18px;
  background:rgba(0,0,0,.35);
  border:1px solid rgba(255,255,255,.14);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  backdrop-filter:blur(8px);
}
.error{
  position:absolute;inset:12px;
  border-radius:18px;
  background:rgba(220,38,38,.12);
  border:1px solid rgba(220,38,38,.35);
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  justify-content:center;
  padding:18px;
}

/* ===== Buttons theme ===== */
.btn-light{background:rgba(255,255,255,.10)!important;color:var(--text)!important}
.btn-outline-primary{color:#9ec5fe!important;border-color:rgba(158,197,254,.6)!important}
.btn-primary{box-shadow:0 12px 30px rgba(37,99,235,.25)}
a,.btn-link{color:#bcd7ff!important}

/* ===== Fullscreen ===== */
.fullscreen .main{padding:0}
.fullscreen .panel{border-radius:0;height:100vh}
.fullscreen .viewer-wrap{min-height:calc(100vh - 118px)}

/* ===== Modal readability (Bootstrap modal default light) ===== */
.modal .modal-content{ color:#111 !important; }
.modal .modal-content .text-muted{ color:#555 !important; }
.modal .modal-content .form-label{ color:#111 !important; }
.modal .modal-content .btn-close{ filter:none; }

/* ============================================================
   SINGLE PAGE MODE (1 halaman, full untuk HP/Tablet)
   ============================================================ */
.book.single{
  /* lepas aspect-ratio supaya tinggi bisa mengikuti layar */
  aspect-ratio: auto !important;
}
.book.single .page.right{display:none !important;}
.book.single .page.left{
  width:100% !important;
  border-right:none !important;
  padding:10px !important;
}

/* Canvas jadi “besar & kebaca” */
.book.single .page canvas{
  width:100% !important;
  height:auto !important;
  max-width:100% !important;

  /* pakai tinggi layar, biar di HP/Tablet kebaca besar */
  max-height: min(78vh, 980px) !important;
}

/* Saat fullscreen: dorong maksimal */
:fullscreen .book.single .page canvas{
  max-height: calc(100vh - 40px) !important;
}