:root{
  /* Paleta — "cristal oscuro" */
  --bg-0:#0a0e1a;          /* fondo profundo */
  --bg-1:#111726;
  --glass:rgba(22,29,46,.72);
  --glass-hi:rgba(40,50,78,.55);
  --stroke:rgba(255,255,255,.08);
  --stroke-hi:rgba(255,255,255,.16);
  --ink:#e9edf6;
  --ink-dim:#97a0b8;
  --accent:#4f8cff;        /* azul eléctrico */
  --accent-2:#7b5cff;      /* violeta */
  --danger:#ff5d6c;
  --ok:#3ddc97;
  --shadow:0 24px 60px -12px rgba(0,0,0,.7);
  --radius:14px;
  --tb-h:52px;             /* alto de la taskbar */
  --font: "Segoe UI", system-ui, -apple-system, "Inter", sans-serif;
  --mono: ui-monospace, "SF Mono", Consolas, monospace;
}

*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden;font-family:var(--font);color:var(--ink);
  -webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select{font-family:inherit}

/* ============ FONDO ============ */
#scene{position:fixed;inset:0;
  background:
    radial-gradient(1200px 800px at 75% -10%, rgba(79,140,255,.18), transparent 60%),
    radial-gradient(900px 700px at 10% 110%, rgba(123,92,255,.16), transparent 60%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1));
  background-size:cover;background-position:center}

/* ============ LOGIN ============ */
#login{position:fixed;inset:0;display:grid;place-items:center;z-index:1000;
  transition:opacity .5s ease, transform .5s ease}
#login.hide{opacity:0;transform:scale(1.04);pointer-events:none}
.card{width:min(380px,90vw);padding:38px 34px;border-radius:20px;
  background:var(--glass);backdrop-filter:blur(28px) saturate(140%);
  -webkit-backdrop-filter:blur(28px) saturate(140%);
  border:1px solid var(--stroke-hi);box-shadow:var(--shadow)}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:26px}
.logo{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  font-weight:800;font-size:18px;letter-spacing:-1px;box-shadow:0 6px 18px rgba(79,140,255,.4)}
.brand h1{font-size:18px;margin:0;font-weight:650;letter-spacing:.3px}
.brand p{margin:2px 0 0;font-size:12px;color:var(--ink-dim)}
.field{margin-bottom:14px}
.field label{display:block;font-size:12px;color:var(--ink-dim);margin-bottom:6px}
.field input{width:100%;padding:12px 14px;border-radius:11px;font-size:14px;
  background:rgba(0,0,0,.25);border:1px solid var(--stroke);color:var(--ink);outline:none;
  transition:border-color .2s, box-shadow .2s}
.field input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,140,255,.18)}
.btn{width:100%;padding:13px;border-radius:11px;font-size:14px;font-weight:600;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;
  transition:filter .2s, transform .1s}
.btn:hover{filter:brightness(1.08)} .btn:active{transform:translateY(1px)}
.err{color:var(--danger);font-size:13px;min-height:18px;margin:4px 2px 12px;text-align:center}

/* ============ ESCRITORIO ============ */
#desktop{position:fixed;inset:0 0 var(--tb-h) 0;z-index:1}
.dz-icon{position:absolute;width:88px;text-align:center;padding:8px 4px;border-radius:10px;
  cursor:default;user-select:none;transition:background .15s}
.dz-icon:hover{background:rgba(255,255,255,.07)}
.dz-icon.sel{background:rgba(79,140,255,.22);outline:1px solid rgba(79,140,255,.5)}
.dz-icon .ic{font-size:34px;line-height:1;height:40px;display:grid;place-items:center}
.dz-icon .lb{font-size:12px;margin-top:6px;color:var(--ink);word-break:break-word;
  text-shadow:0 1px 4px rgba(0,0,0,.6);max-height:32px;overflow:hidden}

/* ============ TASKBAR ============ */
#taskbar{position:fixed;left:0;right:0;bottom:0;height:var(--tb-h);z-index:900;
  display:flex;align-items:center;gap:8px;padding:0 12px;
  background:var(--glass);backdrop-filter:blur(24px);border-top:1px solid var(--stroke)}
#startBtn{display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:10px;
  font-weight:600;font-size:13px;transition:background .15s}
#startBtn:hover{background:var(--glass-hi)}
#startBtn .dot{width:20px;height:20px;border-radius:6px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2))}
#taskItems{display:flex;gap:6px;flex:1;overflow:hidden}
.task-pill{display:flex;align-items:center;gap:7px;padding:7px 12px;border-radius:9px;
  font-size:12px;max-width:180px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  background:var(--glass-hi);border:1px solid var(--stroke);transition:background .15s}
.task-pill:hover{background:rgba(255,255,255,.12)}
.task-pill.active{border-color:var(--accent)}
#clock{font-size:12px;color:var(--ink-dim);font-variant-numeric:tabular-nums;text-align:right;line-height:1.3}

/* ============ MENÚ INICIO ============ */
#startMenu{position:fixed;left:12px;bottom:calc(var(--tb-h) + 10px);z-index:950;
  width:420px;max-width:92vw;padding:18px;border-radius:16px;
  background:var(--glass);backdrop-filter:blur(28px);border:1px solid var(--stroke-hi);
  box-shadow:var(--shadow);opacity:0;transform:translateY(12px) scale(.98);pointer-events:none;
  transition:opacity .2s, transform .2s}
#startMenu.show{opacity:1;transform:none;pointer-events:auto}
#startMenu h3{margin:0 0 12px;font-size:12px;color:var(--ink-dim);text-transform:uppercase;letter-spacing:1px}
.app-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.app-tile{display:flex;flex-direction:column;align-items:center;gap:8px;padding:14px 6px;
  border-radius:12px;transition:background .15s;font-size:12px;text-align:center}
.app-tile:hover{background:var(--glass-hi)}
.app-tile .ic{font-size:30px}
.sm-footer{display:flex;justify-content:space-between;align-items:center;margin-top:16px;
  padding-top:14px;border-top:1px solid var(--stroke)}
.sm-user{display:flex;align-items:center;gap:10px;font-size:13px}
.sm-user .av{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));font-weight:700;font-size:13px}
.sm-actions{display:flex;gap:6px}
.sm-actions button{padding:8px 10px;border-radius:8px;font-size:12px;background:var(--glass-hi)}
.sm-actions button:hover{background:rgba(255,255,255,.14)}

/* ============ VENTANAS ============ */
.win{position:absolute;min-width:320px;min-height:200px;border-radius:var(--radius);
  background:var(--glass);backdrop-filter:blur(24px);border:1px solid var(--stroke);
  box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden;
  transition:opacity .15s, transform .15s}
.win.min{opacity:0;transform:scale(.9);pointer-events:none}
.win-bar{height:40px;display:flex;align-items:center;gap:10px;padding:0 8px 0 14px;
  cursor:move;user-select:none;background:linear-gradient(90deg,rgba(79,140,255,.08),transparent);
  border-bottom:1px solid var(--stroke)}
.win.focus .win-bar{background:linear-gradient(90deg,rgba(79,140,255,.22),rgba(123,92,255,.08))}
.win-title{flex:1;font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.win-btns{display:flex;gap:4px}
.win-btns button{width:30px;height:26px;border-radius:7px;font-size:13px;color:var(--ink-dim);
  display:grid;place-items:center;transition:background .15s,color .15s}
.win-btns button:hover{background:var(--glass-hi);color:var(--ink)}
.win-btns .close:hover{background:var(--danger);color:#fff}
.win-body{flex:1;overflow:auto;position:relative}
.win-body iframe{width:100%;height:100%;border:none;background:#fff}
.win-resize{position:absolute;width:16px;height:16px;right:0;bottom:0;cursor:nwse-resize}

/* ============ EXPLORADOR DE ARCHIVOS ============ */
.fx{display:flex;flex-direction:column;height:100%;background:var(--bg-1)}
.fx-tool{display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid var(--stroke)}
.fx-tool button{padding:7px 12px;border-radius:8px;font-size:13px;background:var(--glass-hi);
  border:1px solid var(--stroke);transition:background .15s}
.fx-tool button:hover{background:rgba(255,255,255,.14)}
.fx-path{flex:1;font-size:12px;color:var(--ink-dim);font-family:var(--mono)}
.fx-quota{font-size:11px;color:var(--ink-dim)}
.fx-grid{flex:1;overflow:auto;padding:16px;display:grid;
  grid-template-columns:repeat(auto-fill,96px);gap:10px;align-content:start}
.fx-item{display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px 4px;
  border-radius:10px;cursor:default;text-align:center;transition:background .12s}
.fx-item:hover{background:var(--glass-hi)}
.fx-item.sel{background:rgba(79,140,255,.22);outline:1px solid rgba(79,140,255,.5)}
.fx-item .ic{font-size:34px;height:38px;display:grid;place-items:center}
.fx-item .nm{font-size:11px;word-break:break-word;max-height:30px;overflow:hidden}
.fx-empty{color:var(--ink-dim);font-size:13px;padding:30px;text-align:center;grid-column:1/-1}
.fx-drop{outline:2px dashed var(--accent);outline-offset:-10px}

/* ============ MENÚ CONTEXTUAL ============ */
#ctx{position:fixed;z-index:2000;min-width:170px;padding:6px;border-radius:11px;
  background:var(--glass);backdrop-filter:blur(24px);border:1px solid var(--stroke-hi);
  box-shadow:var(--shadow);opacity:0;pointer-events:none;transform:scale(.96);
  transition:opacity .12s, transform .12s}
#ctx.show{opacity:1;pointer-events:auto;transform:none}
#ctx button{display:block;width:100%;text-align:left;padding:9px 12px;border-radius:7px;font-size:13px}
#ctx button:hover{background:var(--glass-hi)}
#ctx hr{border:none;border-top:1px solid var(--stroke);margin:5px 4px}
#ctx .danger{color:var(--danger)}

/* ============ TOAST ============ */
#toasts{position:fixed;bottom:calc(var(--tb-h) + 14px);right:16px;z-index:3000;
  display:flex;flex-direction:column;gap:8px}
.toast{padding:12px 16px;border-radius:11px;font-size:13px;background:var(--glass);
  backdrop-filter:blur(20px);border:1px solid var(--stroke-hi);box-shadow:var(--shadow);
  animation:slideIn .25s ease}
.toast.err{border-color:rgba(255,93,108,.5)}
@keyframes slideIn{from{opacity:0;transform:translateX(30px)}to{opacity:1;transform:none}}

/* ============ ADMIN (dentro de ventana) ============ */
.adm{padding:0;height:100%;display:flex;flex-direction:column;background:var(--bg-1)}
.adm-tabs{display:flex;gap:4px;padding:12px 12px 0;border-bottom:1px solid var(--stroke)}
.adm-tabs button{padding:9px 16px;border-radius:8px 8px 0 0;font-size:13px;color:var(--ink-dim)}
.adm-tabs button.active{background:var(--glass-hi);color:var(--ink)}
.adm-body{flex:1;overflow:auto;padding:18px}
.adm table{width:100%;border-collapse:collapse;font-size:13px}
.adm th,.adm td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--stroke)}
.adm th{color:var(--ink-dim);font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.5px}
.adm input,.adm select{padding:8px 10px;border-radius:8px;background:rgba(0,0,0,.25);
  border:1px solid var(--stroke);color:var(--ink);font-size:13px;outline:none}
.adm input:focus,.adm select:focus{border-color:var(--accent)}
.adm-btn{padding:8px 14px;border-radius:8px;font-size:13px;font-weight:600;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}
.adm-btn.ghost{background:var(--glass-hi);color:var(--ink)}
.adm-btn.del{background:rgba(255,93,108,.18);color:var(--danger)}
.adm-row{display:flex;gap:8px;flex-wrap:wrap;align-items:end;margin-bottom:18px}
.adm-row .f{display:flex;flex-direction:column;gap:4px}
.adm-row label{font-size:11px;color:var(--ink-dim)}
.pill{padding:3px 9px;border-radius:20px;font-size:11px}
.pill.on{background:rgba(61,220,151,.18);color:var(--ok)}
.pill.off{background:rgba(255,93,108,.18);color:var(--danger)}

@media(max-width:600px){
  .app-grid{grid-template-columns:repeat(3,1fr)}
  #startMenu{width:92vw}
}