/* ============================================================
   Book OS — admin panel layout
   ============================================================ */

.adm { display: grid; grid-template-columns: 248px 1fr; min-height: 100vh; }

.adm-side {
  background: var(--surface); border-right: 1px solid var(--border);
  padding: 20px 14px; position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.adm-side .brand { padding: 6px 8px 20px; }
.adm-nav { display: flex; flex-direction: column; gap: 2px; }
.adm-nav a {
  display: flex; align-items: center; gap: 11px; padding: 10px 12px;
  border-radius: 11px; color: var(--ink-2); font-weight: 600; font-size: 14px;
}
.adm-nav a:hover { background: var(--surface-2); text-decoration: none; }
.adm-nav a.active { background: #edeaff; color: var(--primary-ink); }
.adm-nav a.active .icon { color: var(--primary); }
.adm-nav .sep { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 16px 12px 6px; }

.adm-main { display: flex; flex-direction: column; min-width: 0; }
.adm-top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 16px 28px; background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
}
.adm-top h1 { font-size: 20px; margin: 0; letter-spacing: -.3px; }
.adm-body { padding: 28px; }

.adm-user { display: flex; align-items: center; gap: 10px; }
.avatar { width: 38px; height: 38px; border-radius: 50%; background: var(--grad); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 14px; }

/* auth screen */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px;
  background: radial-gradient(1200px 500px at 50% -10%, #ece9ff 0%, var(--bg) 60%); }
.auth-card { width: 100%; max-width: 400px; }
.auth-card .brand { justify-content: center; flex-direction: column; text-align: center; margin-bottom: 8px; }
.auth-card .brand-mark { width: 60px; height: 60px; border-radius: 18px; }
.auth-card img.brand-mark { width: 60px; height: 60px; }

/* page grid tools */
.pagegrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 14px; }
.pcell {
  position: relative; border: 1px solid var(--border); border-radius: var(--r); overflow: hidden;
  background: var(--surface-2); cursor: grab;
}
.pcell.sortable-ghost { opacity: .4; }
.pcell.sortable-chosen { box-shadow: var(--shadow-lg); }
.pcell img { width: 100%; aspect-ratio: 3/4; object-fit: cover; background: #fff; }
.pcell .pnum { position: absolute; top: 6px; left: 6px; background: rgba(30,36,71,.82); color: #fff;
  font-size: 11px; font-weight: 700; padding: 2px 7px; border-radius: 999px; }
.pcell .pdel { position: absolute; top: 6px; right: 6px; background: rgba(255,255,255,.92);
  border: 0; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center;
  color: var(--coral); cursor: pointer; opacity: 0; transition: .15s; }
.pcell:hover .pdel { opacity: 1; }

/* dropzone */
.dropzone {
  border: 2px dashed var(--border-2); border-radius: var(--r-lg); padding: 34px;
  text-align: center; color: var(--muted); background: var(--surface-2); transition: .15s; cursor: pointer;
}
.dropzone.drag { border-color: var(--primary); background: #f3f1ff; color: var(--primary-ink); }
.dropzone .icon { color: var(--primary); }

.up-item { display: flex; align-items: center; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.up-item .bar { flex: 1; }

/* nested tree editor */
.tree-unit { border: 1px solid var(--border); border-radius: var(--r); margin-bottom: 12px; overflow: hidden; }
.tree-unit > header { display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: var(--surface-2); }
.tree-unit > header .grow { font-weight: 700; }
.tree-ch { display: flex; align-items: center; gap: 10px; padding: 9px 14px 9px 32px; border-top: 1px solid var(--border); }
.tree-ch .grow { font-size: 14px; }

@media (max-width: 860px) {
  .adm { grid-template-columns: 1fr; }
  .adm-side { position: fixed; z-index: 50; width: 248px; transform: translateX(-100%); transition: .2s; }
  .adm-side.open { transform: none; }
  .adm-body { padding: 18px; }
}