:root {
  --fondo: #0f1115;
  --panel: #181b22;
  --borde: #2a2f3a;
  --texto: #e8eaf0;
  --tenue: #9aa3b2;
  --acento: #2d7ff9;
  --rojo: #ef4444;
  --verde: #22c55e;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--fondo); color: var(--texto);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
h1 { font-size: 20px; margin: 0; }
button, .boton {
  font: inherit; font-size: 15px; padding: 10px 16px; border-radius: 8px; border: 1px solid var(--borde);
  background: var(--panel); color: var(--texto); cursor: pointer; text-decoration: none; display: inline-block;
}
button.principal { background: var(--acento); border-color: var(--acento); color: #fff; }
button:disabled { opacity: .5; cursor: default; }
input[type=text], input[type=password], select {
  font: inherit; font-size: 16px; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--borde);
  background: var(--fondo); color: var(--texto); width: 100%;
}
label { font-size: 14px; color: var(--tenue); }

/* ---------- Cámara ---------- */
.cam { max-width: 720px; margin: 0 auto; padding: 16px; display: flex; flex-direction: column; gap: 14px; }
.tarjeta { background: var(--panel); border: 1px solid var(--borde); border-radius: 12px; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.fila { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.check { display: flex; gap: 8px; align-items: center; color: var(--texto); font-size: 15px; }
.visor { position: relative; border-radius: 12px; overflow: hidden; background: #000; }
.visor video, .visor canvas { display: block; width: 100%; height: auto; }
.visor canvas { position: absolute; inset: 0; height: 100%; }
.en-vivo { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; color: var(--rojo); }
.en-vivo::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--rojo); animation: latido 1.2s infinite; }
@keyframes latido { 50% { opacity: .3; } }
.estado { font-size: 14px; color: var(--tenue); }
.oculto { display: none !important; }

/* ---------- Login ---------- */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login form { width: 100%; max-width: 340px; }
.error { color: var(--rojo); font-size: 14px; }

/* ---------- Admin ---------- */
.barra {
  position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 12px 16px; background: var(--panel); border-bottom: 1px solid var(--borde);
}
.contador { color: var(--tenue); font-size: 14px; }
.rejilla { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; padding: 16px; }
@media (max-width: 400px) { .rejilla { grid-template-columns: 1fr; padding: 12px; } }
.mosaico { background: var(--panel); border: 1px solid var(--borde); border-radius: 12px; overflow: hidden; cursor: zoom-in; display: flex; flex-direction: column; }
.mosaico .marco { position: relative; width: 100%; aspect-ratio: 4 / 3; background: #000; }
.mosaico .marco video, .mosaico .marco canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.mosaico .marco video { object-fit: contain; }
.mosaico .info { padding: 10px 12px; display: flex; flex-direction: column; gap: 4px; }
.mosaico .nombre { font-weight: 600; display: flex; align-items: center; gap: 8px; }
.mosaico .estado-cam { font-weight: 400; font-size: 13px; color: var(--tenue); margin-left: auto; }
.mosaico .punto { width: 8px; height: 8px; border-radius: 50%; background: var(--verde); flex: none; }
.mosaico.sin-senal .punto { background: var(--tenue); }
.mosaico .resumen { font-size: 13px; color: var(--tenue); min-height: 1.3em; }
.mosaico.ampliado {
  position: fixed; inset: 0; z-index: 10; border-radius: 0; border: 0; cursor: zoom-out;
}
.mosaico.ampliado .marco { flex: 1; min-height: 0; aspect-ratio: auto; }
.vacio { grid-column: 1 / -1; text-align: center; color: var(--tenue); padding: 60px 16px; line-height: 1.6; }