:root {
  --bg: #0e1420; --card: #171f2f; --line: #26324a;
  --tx: #e8edf6; --mut: #93a1b8; --sol: #f5b942; --verde: #34d399;
}
* { box-sizing: border-box; margin: 0; }
body {
  background: var(--bg); color: var(--tx); min-height: 100vh;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex; flex-direction: column;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px; border-bottom: 1px solid var(--line);
  background: rgba(23, 31, 47, .7);
}
.brand { display: flex; gap: 10px; align-items: center; font-size: 1.15rem; }
.brand .logo-app { width: 30px; height: 30px; object-fit: contain; }
.logo-login { width: 210px; height: auto; object-fit: contain; margin: 0 auto 6px; display: block; }
.sel-form { display: inline; margin-right: 14px; }
.sel-inst {
  background: var(--card); color: var(--tx); border: 1px solid var(--line);
  border-radius: 999px; padding: 6px 12px; font-size: .9rem; cursor: pointer;
}
.sel-inst:hover { border-color: var(--sol); }
.sel-demo {
  border-color: #a78bfa; background: linear-gradient(135deg, rgba(167,139,250,.12), rgba(139,92,246,.08));
  font-weight: 600;
}
.sel-demo:hover { border-color: #8b5cf6; }
.demo-badge {
  display: inline-block; font-size: .75rem; font-weight: 700;
  padding: 3px 10px; border-radius: 999px; margin-left: 8px;
  background: linear-gradient(135deg, #a78bfa, #7c3aed); color: #fff;
  vertical-align: middle;
}
.demo-desc {
  display: inline-block; font-size: .72rem; color: var(--mut);
  margin-left: 6px; vertical-align: middle; font-style: italic;
}

/* ---------- Estado del sistema y alarmas ---------- */
.estado-badge {
  font-size: .78rem; font-weight: 700; padding: 4px 12px;
  border-radius: 999px; margin-left: 10px; vertical-align: middle;
}
.estado-badge.conectado { color: #34d399; border: 1px solid #34d39966; }
.estado-badge.desconectado { color: var(--mut); border: 1px solid var(--line); }
.estado-badge.alarma { color: #f87171; border: 1px solid #f8717166; background: #f8717115; }
.link-alarmas {
  float: right; margin-right: 14px;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 5px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card);
  color: var(--tx); font-size: .85rem; font-weight: 600; text-decoration: none;
  transition: border-color .15s, color .15s, box-shadow .15s;
}
.link-alarmas:hover { border-color: var(--sol); color: var(--sol); }
.link-alarmas.tiene {
  border-color: #f8717177; color: #f87171;
  box-shadow: 0 0 10px #f8717133;
}
.link-alarmas .chip {
  background: #ef4444; color: #fff; border-radius: 999px;
  padding: 1px 8px; font-size: .75rem; font-weight: 800; line-height: 1.5;
}
.filtro-alarmas { float: right; display: flex; gap: 8px; }
.filtro-alarmas .btn-sec.sel { border-color: var(--sol); color: var(--sol); }
.tag-activa { color: #f87171; font-weight: 700; font-size: .8rem; }
.fila-resuelta td { opacity: .45; }
.btn-mini { padding: 3px 10px !important; font-size: .78rem !important; }
.inline { display: inline; }
.brand b, .login-box b { color: var(--sol); }
nav a {
  color: var(--tx); text-decoration: none; margin-left: 18px; padding: 6px 12px;
  border-radius: 999px;
}
nav a:hover { background: var(--card); }
nav a.muted { color: var(--mut); }
main { flex: 1; padding: 26px; max-width: 1100px; margin: 0 auto; width: 100%; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 20px 22px;
}
.card.wide { grid-column: 1 / -1; }
h2 { font-size: 1rem; color: var(--mut); font-weight: 600; margin-bottom: 12px; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 14px; }
.kpi { background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 14px; display: flex; flex-direction: column; }
.kpi .k { font-size: 1.45rem; font-weight: 700; color: var(--sol); }
.kpi .l { color: var(--mut); font-size: .85rem; }
.muted { color: var(--mut); font-size: .88rem; }
.aviso { color: var(--sol); }
.lista { list-style: none; }
.lista li { padding: 7px 0; border-bottom: 1px dashed var(--line); }
.card.wide .lista-umbrales { max-width: 560px; }
.mapas { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.mapa { position: relative; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); }
.mapa img { display: block; width: 100%; height: auto; filter: saturate(.8) brightness(.9); }
.mapa-etq {
  position: absolute; left: 10px; bottom: 10px;
  font-size: .68rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
  background: rgba(14, 20, 32, .8); border: 1px solid var(--line);
  border-radius: 999px; padding: .16rem .6rem; color: var(--mut);
}
.pin {
  position: absolute; left: 50%; top: 50%; width: 14px; height: 14px;
  transform: translate(-50%, -100%);
}
.pin::before {
  content: ""; position: absolute; inset: 0; border-radius: 50% 50% 50% 0;
  background: #ef4444; transform: rotate(-45deg);
  box-shadow: 0 0 0 4px rgba(239, 68, 68, .25);
}
.login-box {
  max-width: 340px; margin: 70px auto; text-align: center;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 34px 30px;
}
.login-box h1 { font-size: 1.5rem; margin: 10px 0 4px; }
.login-hint { color: var(--mut); margin-bottom: 16px; }
.error { color: #ef4444; margin-bottom: 10px; }
input[type="password"], input[type="text"] {
  width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--tx); font-size: 1rem;
}
button[type="submit"] {
  width: 100%; margin-top: 12px; padding: 10px; border: 0; border-radius: 10px;
  background: var(--sol); color: #201a08; font-weight: 700; font-size: 1rem; cursor: pointer;
}
button[type="submit"]:hover { filter: brightness(1.08); }
footer { border-top: 1px solid var(--line); padding: 16px 28px; margin-top: 30px; }

/* ---------- Diagrama de flujo de energia ---------- */
.flujo-wrap { width: 100%; overflow-x: auto; }
.flujo { width: 100%; min-width: 640px; height: auto; }
.etq { fill: var(--mut); font-size: 13px; }
.mini { fill: var(--mut); font-size: 11px; }
.valor { fill: var(--tx); font-size: 15px; font-weight: 700; }
.sol-tx { fill: var(--sol); }
.inv-titulo { fill: var(--tx); font-size: 14px; font-weight: 700; letter-spacing: 2px; }
.inv-sub { fill: var(--mut); font-size: 10px; }
.caja-inv { fill: #1d2940; stroke: var(--sol); stroke-width: 1.5; }
.caja-bat { fill: #1d2940; stroke: #4ade80; stroke-width: 1.5; }
.bat-nivel { fill: #4ade80; }
.icono-torreta { stroke: var(--mut); fill: none; }
.icono-carga-circ { fill: #1d2940; stroke: var(--verde); stroke-width: 1.5; }
.icono-carga { fill: var(--verde); }

/* Linea base: solida, color segun estado */
.flujo-base {
  fill: none; stroke: #374151; stroke-width: 3;
  stroke-linecap: round;
  transition: stroke .4s;
}
.flujo-base.cargando  { stroke: #22c55e; }
.flujo-base.descargando { stroke: #ef4444; }
.flujo-base.red-alimenta { stroke: #ef4444; }
.flujo-base.red-absorbe { stroke: #22c55e; }
.flujo-base.inv-azul   { stroke: #3b82f6; }
.flujo-base.sol-activa { stroke: #f5b942; }

/* Linea de pulso: segmento brillante que viaja */
.flujo-pulso {
  fill: none; stroke-width: 5; stroke-linecap: round;
  stroke-dasharray: 20 80;
}
.flujo-pulso.sol-activa   { stroke: #fcd34d; }
.flujo-pulso.cargando     { stroke: #4ade80; }
.flujo-pulso.descargando  { stroke: #f87171; }
.flujo-pulso.red-alimenta { stroke: #f87171; }
.flujo-pulso.red-absorbe  { stroke: #4ade80; }
.flujo-pulso.inv-azul     { stroke: #60a5fa; }

.cable-etq { fill: var(--tx); font-size: 12px; font-weight: 600;
             paint-order: stroke; stroke: var(--bg); stroke-width: 3px; }

/* ---------- Iconos PNG en diagrama ---------- */
.flujo image { filter: drop-shadow(0 2px 6px rgba(0,0,0,.35)); }
.flujo image:hover { filter: drop-shadow(0 4px 12px rgba(245,185,66,.5)); }

/* ---------- Bateria SVG ---------- */
.caja-bat-svg { fill: #1d2940; stroke: #4ade80; stroke-width: 2; }
.bat-nivel-svg { fill: #4ade80; }
.inv-titulo { fill: var(--tx); font-size: 13px; font-weight: 700; letter-spacing: 1px; }

/* ---------- Controles: refresco y grafica ---------- */
.btn-refrescar {
  float: right; margin-top: -4px; padding: 5px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg); color: var(--tx);
  font-size: .85rem; cursor: pointer;
}
.btn-refrescar:hover:not(:disabled) { border-color: var(--sol); color: var(--sol); }
.btn-refrescar:disabled { opacity: .5; cursor: wait; }
.mini-estado { float: right; margin-right: 10px; font-size: .8rem; color: var(--mut); }
.grafica-controles { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-bottom: 12px; align-items: center; }
.chk { color: var(--mut); font-size: .88rem; display: flex; gap: 5px; align-items: center; cursor: pointer; }
.chk input { accent-color: var(--sol); }
#g-fecha {
  margin-left: auto; background: var(--bg); color: var(--tx);
  border: 1px solid var(--line); border-radius: 8px; padding: 4px 8px;
}
.grafica-wrap { position: relative; height: 340px; }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
  padding: 6px 18px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--bg); color: var(--mut); font-size: .9rem; cursor: pointer;
}
.tab.activo { background: var(--sol); color: #201a08; font-weight: 700; border-color: var(--sol); }
.tabla { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: .88rem; }
.tabla th { text-align: left; color: var(--mut); font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.tabla td { padding: 6px 8px; border-bottom: 1px dashed var(--line); }
.da-controles { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-bottom: 10px; }
.da-parametros summary { cursor: pointer; color: var(--mut); font-size: .9rem; margin-bottom: 8px; }
.grafica-wrap.grande { height: 420px; }

/* ---------- Ajustes ---------- */
.campo { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px;
         color: var(--mut); font-size: .88rem; }
.campo input { max-width: 320px; }
.btn-guardar {
  padding: 9px 22px; border-radius: 10px; border: 0; cursor: pointer;
  background: var(--sol); color: #201a08; font-weight: 700; font-size: .95rem;
}
.btn-sec {
  display: inline-block; padding: 7px 14px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--line); background: var(--bg); color: var(--tx);
  font-size: .88rem; text-decoration: none;
}
.btn-sec:hover { border-color: var(--sol); color: var(--sol); }
.ok-msg { color: var(--verde, #34d399); border-color: #34d39955; }
.export-fila { display: flex; gap: 18px; align-items: end; flex-wrap: wrap; }
.footer-inner { display: flex; align-items: center; gap: 16px; max-width: 1100px; margin: 0 auto; }
.firma { height: 34px; opacity: .9; }
.firma-link { display: inline-flex; text-decoration: none; }
.firma-link:hover .firma { opacity: 1; filter: drop-shadow(0 0 6px rgba(245,185,66,.5)); }
/* ---------- Movil ---------- */
@media (max-width: 760px) {
  main { padding: 10px; }
  .footer-inner { padding: 12px; flex-wrap: wrap; justify-content: center; text-align: center; }
  .grid { grid-template-columns: 1fr; gap: 12px; }
  .card { padding: 14px; border-radius: 13px; }
  .card.wide .lista-umbrales { max-width: none; }
  .mapas { grid-template-columns: 1fr; gap: 10px; }

  /* barra superior apilada y compacta */
  .topbar { flex-direction: column; gap: 6px; padding: 8px 10px; }
  .brand { font-size: 1rem; }
  nav { display: flex; flex-wrap: wrap; justify-content: center;
        gap: 4px; width: 100%; }
  nav a { margin-left: 0; padding: 5px 9px; font-size: .85rem; }
  .sel-form { margin-right: 4px; }
  .sel-inst { max-width: 52vw; padding: 5px 8px; font-size: .82rem; }

  /* titulos de tarjeta: los botones flotantes pasan a linea propia */
  .card h2 { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
  .card h2 > .btn-refrescar,
  .card h2 > .link-alarmas,
  .card h2 > .filtro-alarmas { float: none; margin: 0 0 0 auto; }
  .filtro-alarmas { margin-left: auto; }

  /* diagrama de flujo: escala al ancho SIN scroll y se compensa
     agrandando los textos (el SVG es de 900x350 -> ~0.4x en movil) */
  .flujo-wrap { overflow-x: visible; padding: 0; }
  .flujo { min-width: 0; }
  .etq { font-size: 20px; }
  .valor { font-size: 27px; }
  .mini { font-size: 17px; }
  .cable-etq { font-size: 19px; stroke-width: 3px; }
  .inv-titulo { font-size: 22px; }
  .inv-sub { font-size: 15px; }

  /* kpis mas compactos: 2 por fila */
  .kpis { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .kpi { padding: 10px; }
  .kpi .k { font-size: 1.25rem; }

  /* grafica proporcionada al movil */
  .grafica-wrap { height: 250px; }

  /* tablas desplazables */
  .tabla { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tabla th, .tabla td { white-space: nowrap; padding: 6px 6px; }

  /* formularios y controles */
  .campo input, .sel-inst, input[type="date"], select { max-width: 100%; width: 100%; box-sizing: border-box; }
  .export-fila { flex-direction: column; align-items: stretch; gap: 10px; }
  .export-fila .btn-sec { text-align: center; }
  .da-controles { gap: 8px; }
  .grafica-controles { gap: 6px 10px; }
  .grafica-wrap.grande { height: 280px; }
  .login-box { width: min(92vw, 360px); margin: 40px auto; padding: 22px 18px; }
  .logo-login { width: min(180px, 55vw); }
}

@media (max-width: 380px) {
  nav a { padding: 5px 8px; font-size: .8rem; }
  .kpis { grid-template-columns: repeat(2, 1fr); }
  .kpi .k { font-size: 1.15rem; }
  .valor { font-size: 30px; }
  .etq { font-size: 22px; }
}