/* ══════════════════════════════════════════════════════════════════
   CoreTube · sistema de diseño
   Paleta: turquesa + rosa neón sobre navy casi negro (o gris claro).
   ══════════════════════════════════════════════════════════════════ */
:root{
  --turq:#2DE6C4; --turq-2:#12b39a; --pink:#FF2E9A; --pink-2:#d61f7d;
  --blue:#4C8DFF; --amber:#F59E0B; --green:#A6E22E; --red:#FF5470;
  --bg:#0a0e17; --bg-2:#0f1421; --panel:#131a2a; --panel-2:#182236;
  --border:#243049; --border-2:#2f3d5c;
  --text:#e7ecf2; --muted:#9fb0c9; --muted-2:#7c8aa0;
  --shadow:0 18px 50px -24px rgba(0,0,0,.7);
  --radius:16px; --radius-sm:10px;
  --grad:linear-gradient(135deg,var(--turq),#1fb7d8 55%,var(--pink));
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
body.light-mode{
  --turq:#0C9C86; --turq-2:#0a8271; --pink:#D6266E; --pink-2:#b81f5d;
  --bg:#f4f6fb; --bg-2:#eef1f8; --panel:#ffffff; --panel-2:#f7f9fc;
  --border:#e2e7f0; --border-2:#d3dae6;
  --text:#111a2b; --muted:#54617a; --muted-2:#7c8aa0;
  --shadow:0 18px 50px -30px rgba(30,50,90,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);
  font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--turq);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0 0 .4em;line-height:1.2;letter-spacing:-.02em}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)}
.small{font-size:12px}
.center{text-align:center}

/* ─── Botones ───────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:10px 18px;border-radius:var(--radius-sm);border:1px solid var(--border-2);
  background:var(--panel-2);color:var(--text);font-weight:600;font-size:13.5px;
  cursor:pointer;transition:.15s;text-decoration:none;font-family:inherit}
.btn:hover{border-color:var(--turq);transform:translateY(-1px);text-decoration:none}
.btn.primary{background:linear-gradient(135deg,#0C9C86,#1179c4 55%,#D6266E);border:none;color:#fff;font-weight:800;
  text-shadow:0 1px 2px rgba(0,0,0,.3);box-shadow:0 10px 24px -12px rgba(17,121,196,.6)}
.btn.primary:hover{filter:brightness(1.06)}
/* Los <dialog> no heredan el color del body: fíjalo al tema */
dialog{color:var(--text)}
dialog::backdrop{background:rgba(4,8,16,.55)}
.btn.pink{background:linear-gradient(135deg,var(--pink),var(--pink-2));border:none;color:#fff}
.btn.ghost{background:transparent}
.btn.danger{color:var(--red);border-color:transparent;background:rgba(255,84,112,.1)}
.btn.danger:hover{border-color:var(--red)}
.btn.small{padding:6px 12px;font-size:12px}
.btn.block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ─── Paneles / tarjetas ────────────────────────────────────────── */
.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow)}
.panel-head{display:flex;align-items:center;justify-content:space-between;
  gap:12px;margin-bottom:16px;flex-wrap:wrap}
.grid{display:grid;gap:16px}
.grid.k2{grid-template-columns:repeat(2,1fr)}
.grid.k3{grid-template-columns:repeat(3,1fr)}
.grid.k4{grid-template-columns:repeat(4,1fr)}

/* KPI */
.kpi{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px 20px;position:relative;overflow:hidden}
.kpi::before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:var(--grad)}
.kpi .n{font-size:30px;font-weight:800;letter-spacing:-.03em}
.kpi .l{color:var(--muted);font-size:12.5px;margin-top:2px}
.kpi.warn .n{color:var(--amber)} .kpi.bad .n{color:var(--red)} .kpi.ok .n{color:var(--turq)}

/* ─── Formularios ───────────────────────────────────────────────── */
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px;font-weight:600}
input,select,textarea{width:100%;padding:11px 13px;border-radius:var(--radius-sm);
  border:1px solid var(--border-2);background:var(--bg-2);color:var(--text);
  font-family:inherit;font-size:14px;transition:.15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--turq);
  box-shadow:0 0 0 3px rgba(45,230,196,.15)}
input.mono{font-family:var(--mono)}
textarea{resize:vertical;min-height:80px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row>*{flex:1;min-width:0}
.check{display:flex;align-items:center;gap:8px;font-size:13px}
.check input{width:auto}

/* ─── Tablas ────────────────────────────────────────────────────── */
table{width:100%;border-collapse:collapse;font-size:13px}
th{text-align:left;padding:11px 12px;color:var(--muted);font-weight:600;
  border-bottom:1px solid var(--border);white-space:nowrap;font-size:12px}
td{padding:11px 12px;border-bottom:1px solid var(--border);vertical-align:middle}
tbody tr:hover{background:var(--panel-2)}
.table-wrap{overflow-x:auto;border-radius:var(--radius)}

/* ─── Badges / tags ─────────────────────────────────────────────── */
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11.5px;
  font-weight:600;border:1px solid var(--border-2)}
.tag{display:inline-block;padding:2px 9px;border-radius:6px;font-size:11px;
  border:1px solid var(--border-2);color:var(--muted)}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:6px}

/* ─── Flash / alertas ───────────────────────────────────────────── */
.flash{padding:12px 16px;border-radius:var(--radius-sm);margin-bottom:12px;font-size:13px;
  border:1px solid var(--border-2);display:flex;gap:10px;align-items:center}
.flash.success{background:rgba(45,230,196,.1);border-color:rgba(45,230,196,.4);color:var(--turq)}
.flash.error{background:rgba(255,84,112,.1);border-color:rgba(255,84,112,.4);color:var(--red)}
.flash.warning{background:rgba(245,158,11,.1);border-color:rgba(245,158,11,.4);color:var(--amber)}
.flash.info{background:rgba(76,141,255,.1);border-color:rgba(76,141,255,.4);color:var(--blue)}

/* ─── App shell (sidebar + topbar) ──────────────────────────────── */
.shell{display:flex;min-height:100vh}
.sidebar{width:250px;flex-shrink:0;background:var(--bg-2);border-right:1px solid var(--border);
  padding:20px 14px;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;
  padding:6px 10px 18px;letter-spacing:-.02em}
.brand .logo{width:28px;height:28px;flex-shrink:0}
.nav a{display:flex;align-items:center;gap:11px;padding:10px 13px;border-radius:10px;
  color:var(--muted);font-weight:600;font-size:13.5px;margin-bottom:2px}
.nav a:hover{background:var(--panel);color:var(--text);text-decoration:none}
.nav a.active{background:var(--panel);color:var(--text)}
.nav a.active{position:relative}
.nav a.active::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  border-radius:3px;background:var(--grad)}
.nav .ico{width:18px;text-align:center}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 26px;border-bottom:1px solid var(--border);background:var(--bg-2);
  position:sticky;top:0;z-index:20}
.content{padding:26px;max-width:1240px;width:100%;margin:0 auto}
.page-title{font-size:24px;margin-bottom:4px}
.page-sub{color:var(--muted);margin-bottom:20px;font-size:13.5px}
.icon-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--border-2);
  background:var(--panel);color:var(--text);cursor:pointer;font-size:16px;
  display:inline-flex;align-items:center;justify-content:center}
.icon-btn:hover{border-color:var(--turq)}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--grad);color:#04121a;
  font-weight:800;display:flex;align-items:center;justify-content:center;font-size:13px}

/* progress bar */
.pbar{height:8px;border-radius:6px;background:var(--bg-2);overflow:hidden;border:1px solid var(--border)}
.pbar>span{display:block;height:100%;background:var(--grad)}

@media(max-width:900px){
  .grid.k4{grid-template-columns:repeat(2,1fr)}
  .grid.k3,.grid.k2{grid-template-columns:1fr}
  .shell{flex-direction:column}
  .sidebar{width:100%;height:auto;position:static;display:flex;flex-direction:column}
  .nav{display:flex;flex-wrap:wrap;gap:4px}
  .nav a{margin:0}
}