:root{
  --sidebar-bg:#0f1b3d;
  --sidebar-bg-2:#152a5c;
  --accent:#1d6fe0;
  --accent-2:#38bdf8;
  --testo:#1e293b;
  --bordo:#e2e8f0;
  --sidebar-w:250px;
}
*{box-sizing:border-box}
body{margin:0;background:#f1f5f9;color:var(--testo);
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;font-size:14px}

.app-shell{display:flex;min-height:100vh}

/* ---------------------------------------------------------- sidebar */
.sidebar{width:var(--sidebar-w);flex:0 0 var(--sidebar-w);
  background:linear-gradient(180deg,var(--sidebar-bg) 0%,var(--sidebar-bg-2) 100%);
  color:#e2e8f0;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.sidebar .brand{display:flex;align-items:center;gap:10px;padding:20px 18px;font-size:17px;
  font-weight:700;color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
.sidebar .brand i{font-size:22px;color:var(--accent-2)}
.sidebar .menu{flex:1;overflow-y:auto;padding:10px 8px}
.sidebar .menu a{display:flex;align-items:center;gap:10px;padding:9px 12px;margin:2px 0;
  border-radius:8px;color:#cbd5e1;text-decoration:none;font-weight:500;transition:.15s}
.sidebar .menu a:hover{background:rgba(255,255,255,.08);color:#fff}
.sidebar .menu a.attivo{background:var(--accent);color:#fff;box-shadow:0 4px 12px rgba(29,111,224,.35)}
.sidebar .menu a i{width:18px;text-align:center;font-size:15px}
.sidebar .sezione{padding:14px 12px 6px;font-size:11px;letter-spacing:.09em;
  text-transform:uppercase;color:#7f93bb;font-weight:700}
.utente-box{margin:10px;padding:12px;border-radius:10px;background:rgba(255,255,255,.07)}
.utente-box .nome{font-weight:600;color:#fff}
.utente-box .ruolo{font-size:11px;text-transform:uppercase;color:#94a3b8;letter-spacing:.05em}

/* ---------------------------------------------------------- layout */
.contenuto{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{display:flex;align-items:center;gap:12px;background:#fff;padding:14px 22px;
  border-bottom:1px solid var(--bordo);position:sticky;top:0;z-index:20}
.titolo-pagina{font-size:19px;font-weight:700;margin:0}
.area-lavoro{flex:1;padding:22px}
.footer{padding:12px 22px;background:#fff;border-top:1px solid var(--bordo);
  color:#64748b;font-size:12px;text-align:center}

/* ---------------------------------------------------------- card e KPI */
.card{border:1px solid var(--bordo);border-radius:12px;box-shadow:0 1px 2px rgba(15,23,42,.04)}
.card-header{background:#fff;border-bottom:1px solid var(--bordo);font-weight:600;
  border-radius:12px 12px 0 0!important}
.kpi{background:#fff;border:1px solid var(--bordo);border-radius:12px;padding:16px 18px;height:100%}
.kpi .etichetta{color:#64748b;font-size:12px;text-transform:uppercase;letter-spacing:.05em;
  font-weight:600}
.kpi .valore{font-size:32px;font-weight:700;line-height:1.15;margin-top:4px}
.kpi .nota{font-size:12px;color:#94a3b8}
.kpi.verde .valore{color:#059669}.kpi.rosso .valore{color:#dc2626}
.kpi.blu .valore{color:var(--accent)}.kpi.viola .valore{color:#7c3aed}

/* ---------------------------------------------------------- tabelle */
table.dataTable thead th{background:#f8fafc;font-size:12px;text-transform:uppercase;
  letter-spacing:.04em;color:#475569;border-bottom:2px solid var(--bordo)!important}
table.dataTable tbody tr:hover{background:#f8fafc}
table.dataTable td{vertical-align:middle}
.dt-filtro-colonna{width:100%;font-size:12px;padding:3px 6px;border:1px solid var(--bordo);
  border-radius:5px}
.badge-stato{font-size:11px;padding:4px 8px;border-radius:20px;font-weight:600}
.st-online{background:#dcfce7;color:#166534}
.st-offline{background:#fee2e2;color:#991b1b}
.st-attiva{background:#dbeafe;color:#1e40af}
.st-programmata{background:#fef3c7;color:#92400e}
.st-scaduta{background:#e2e8f0;color:#475569}
.st-disabilitata{background:#f1f5f9;color:#94a3b8}

/* ---------------------------------------------------------- albero */
.jstree-default .jstree-anchor{font-size:13.5px}
.riquadro-albero{background:#fff;border:1px solid var(--bordo);border-radius:12px;padding:14px;
  max-height:70vh;overflow:auto}
li.nodo-dispositivo.stato-online > a > .jstree-icon.bi-tv{color:#059669}
li.nodo-dispositivo.stato-offline > a > .jstree-icon.bi-tv{color:#dc2626}

/* ---------------------------------------------------------- playlist editor */
.riga-contenuto{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--bordo);
  border-radius:10px;padding:8px 12px;margin-bottom:8px}
.riga-contenuto.sortable-ghost{opacity:.4}
.maniglia{cursor:grab;color:#94a3b8;font-size:18px}
.riga-contenuto img,.riga-contenuto .segnaposto{width:76px;height:44px;object-fit:cover;
  border-radius:6px;background:#0f172a;color:#fff;display:flex;align-items:center;
  justify-content:center;flex:0 0 76px}
.griglia-media{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px}
.tessera{background:#fff;border:1px solid var(--bordo);border-radius:10px;overflow:hidden;
  cursor:pointer;transition:.15s}
.tessera:hover{border-color:var(--accent);box-shadow:0 6px 18px rgba(15,23,42,.09)}
.tessera.selezionata{border-color:var(--accent);box-shadow:0 0 0 2px rgba(29,111,224,.3)}
.tessera[draggable="true"]{cursor:grab}
.tessera[draggable="true"]:active{cursor:grabbing}
#alberoCartelle a.jstree-anchor.bg-primary-subtle{outline:2px dashed var(--accent);border-radius:4px}
kbd{background:#1e293b;color:#fff;padding:1px 5px;border-radius:4px;font-size:11px}
.tessera .miniatura{height:110px;background:#0f172a;display:flex;align-items:center;
  justify-content:center;color:#64748b}
.tessera .miniatura img{width:100%;height:100%;object-fit:cover}
.tessera .info{padding:8px 10px;font-size:12px}
.tessera .info .nome{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------------------------------------------------------- player */
#palcoPlayer{background:#000;border-radius:10px;overflow:hidden;position:relative;
  aspect-ratio:16/9;display:flex;align-items:center;justify-content:center}
/* Anteprima uguale al player: palco nelle coordinate della risoluzione dichiarata,
   scalato in blocco; sfondo sotto; contenuto dentro il riquadro. */
.ap-palco{position:absolute;left:50%;top:50%;transform-origin:center center;overflow:hidden}
.ap-sfondo{position:absolute;inset:0;background:#000 center/contain no-repeat}
.ap-scena{position:absolute;overflow:hidden;display:flex;
  align-items:flex-start;justify-content:flex-start}
/* durante la dissolvenza i due contenuti convivono: il piu' vecchio e' in posizione
   assoluta e sfuma sotto quello nuovo */
.ap-scena>[style*="position: absolute"]{top:0;left:0}
/* nativa: dimensione reale, ridotta in proporzione solo se non ci sta, mai ritagliata */
.ap-scena img,.ap-scena video{max-width:100%;max-height:100%;width:auto;height:auto;
  object-fit:contain;flex:0 0 auto}
.ap-scena.adatta,.ap-scena.riempi{align-items:center;justify-content:center}
.ap-scena.adatta img,.ap-scena.adatta video{width:100%;height:100%;object-fit:contain}
.ap-scena.riempi img,.ap-scena.riempi video{width:100%;height:100%;object-fit:cover}
.ap-messaggio{color:#94a3b8;font-size:13px;padding:10px}
/* contorno del riquadro con le quote: si vede quanto spazio resta per le altre app */
.ap-contorno{position:absolute;display:none;pointer-events:none;
  outline:2px dashed rgba(255,255,255,.85);outline-offset:-1px;
  box-shadow:0 0 0 2px rgba(0,0,0,.35) inset}
.ap-quota{position:absolute;left:0;bottom:100%;white-space:nowrap;
  background:rgba(0,0,0,.7);color:#fff;font:12px ui-monospace,Consolas,monospace;
  padding:2px 6px;border-radius:4px 4px 0 0}
/* in 1:1 il palco puo' essere piu' grande della finestra: si scorre */
#palcoPlayer.reale{overflow:auto;aspect-ratio:auto;height:60vh;align-items:flex-start;
  justify-content:flex-start}
#palcoPlayer.reale .ap-palco{position:relative;left:0;top:0;transform-origin:top left}
#palcoPlayer.verticale{aspect-ratio:9/16;max-height:70vh;margin:0 auto}
.barra-avanzamento{height:4px;background:var(--accent);width:0;transition:width .2s linear}

/* Schermo intero dell'anteprima: il palco occupa tutto lo spazio disponibile e i
   comandi restano visibili in basso (in fullscreen l'elemento e' fuori dal modale). */
#areaPlayer:fullscreen{background:#000;padding:14px;display:flex;flex-direction:column;gap:8px}
#areaPlayer:fullscreen #palcoPlayer{flex:1;aspect-ratio:auto;border-radius:0;max-height:none}
#areaPlayer:fullscreen #palcoPlayer.verticale{aspect-ratio:auto;max-height:none}
#areaPlayer:fullscreen .comandi-player{color:#e2e8f0}
#areaPlayer:fullscreen .comandi-player .btn{--bs-btn-color:#e2e8f0;--bs-btn-border-color:#475569}

.zona-drop{border:2px dashed #94a3b8;border-radius:12px;padding:28px;text-align:center;
  color:#64748b;background:#fff}
.zona-drop.attiva{border-color:var(--accent);background:#eff6ff;color:var(--accent)}

@media (max-width:991.98px){
  .sidebar{position:fixed;left:-260px;z-index:1050;transition:left .2s}
  .sidebar.aperta{left:0}
}

/* ---------------------------------------------------------- stampa */
@media print{
  .sidebar,.topbar,.footer,.no-stampa{display:none!important}
  .area-lavoro{padding:0}
  body{background:#fff;font-size:11px}
  .foglio{page-break-inside:avoid}
  table{width:100%;border-collapse:collapse}
  table th,table td{border:1px solid #94a3b8;padding:4px 6px}
  thead{display:table-header-group}
}
.foglio{background:#fff;padding:24px;border-radius:10px}
.intestazione-stampa{border-bottom:2px solid var(--sidebar-bg);padding-bottom:10px;margin-bottom:16px}

/* Titolo di sezione dentro i form: deve saltare all'occhio e separare i gruppi di campi */
.sezione-form{display:flex;align-items:center;gap:8px;margin-top:6px;
  padding:9px 12px;border-radius:8px;border-left:4px solid var(--accent);
  background:#eef4fd;
  color:var(--accent);font-weight:700;font-size:14px;letter-spacing:.03em;
  text-transform:uppercase}
.sezione-form i{font-size:16px;line-height:1}
/* schermo gia' coperto da un nodo superiore spuntato: riceve, ma non l'hai scelto tu */
li.nodo-coperto > a{opacity:.75}
li.nodo-coperto > a::after{content:" via nodo superiore";font-size:.75em;color:#0369a1;
  background:#e0f2fe;border-radius:6px;padding:1px 6px;margin-left:6px}