:root{
  --bg:#0f172a; --card:#1e293b; --card2:#243449; --ink:#e2e8f0; --muted:#94a3b8;
  --line:#334155; --brand:#38bdf8; --green:#22c55e; --red:#ef4444; --yellow:#eab308;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink);font-size:14px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.muted{color:var(--muted)}
.mt{margin-top:12px}

/* Login */
.login-body{display:flex;min-height:100vh;align-items:center;justify-content:center}
.login-card{background:var(--card);padding:32px;border-radius:14px;width:320px;box-shadow:0 10px 40px rgba(0,0,0,.4)}
.login-card h1{margin:0;font-size:22px}
.login-card label{display:block;margin:14px 0 4px}

/* Topbar */
.topbar{display:flex;align-items:center;gap:24px;background:var(--card);padding:12px 20px;border-bottom:1px solid var(--line)}
.brand{font-weight:700;font-size:16px}
.topbar nav{display:flex;gap:18px;flex:1}
.topbar .user{display:flex;align-items:center;gap:12px;color:var(--muted)}

.wrap{max-width:1100px;margin:24px auto;padding:0 16px}
h2{margin:8px 0 16px}
.row-between{display:flex;justify-content:space-between;align-items:center;gap:12px}

/* Inputs */
input,select,textarea{width:100%;background:var(--card2);border:1px solid var(--line);color:var(--ink);
  padding:8px 10px;border-radius:8px;font:inherit}
label{display:block;margin:8px 0}
.btn{background:var(--brand);color:#04202e;border:0;padding:10px 16px;border-radius:8px;font-weight:600;cursor:pointer;margin-top:10px}
.btn:hover{opacity:.9}
.btn-red{background:var(--red);color:#fff}
.btn-green{background:var(--green);color:#04240f}
.btn-sm{display:inline-block;background:var(--card2);border:1px solid var(--line);color:var(--ink);
  padding:5px 10px;border-radius:7px;cursor:pointer;font:inherit}
.btn-sm:hover{border-color:var(--brand);text-decoration:none}
.inline{display:inline-flex;gap:6px;align-items:center}
.inline input,.inline select{width:auto}
.inline-full{display:flex;gap:8px;margin-bottom:12px}
.inline-actions{display:flex;gap:8px;flex-wrap:wrap}

/* Tables */
.tabla{width:100%;border-collapse:collapse;background:var(--card);border-radius:12px;overflow:hidden}
.tabla th,.tabla td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line)}
.tabla th{background:var(--card2);font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}
.tabla tr:hover td{background:rgba(56,189,248,.05)}

/* Cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;margin:16px 0}
.card h3{margin:0 0 12px}
.card-alert{border-color:var(--red)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-form{display:grid;grid-template-columns:repeat(4,1fr) auto;gap:8px;align-items:end}
@media(max-width:800px){.grid2{grid-template-columns:1fr}.grid-form{grid-template-columns:1fr}}

.kv{width:100%}
.kv td{padding:5px 6px;border-bottom:1px solid var(--line)}
.kv td:first-child{color:var(--muted);width:42%}

.meters{display:flex;gap:20px;margin-bottom:12px}
.meter{background:var(--card2);border-radius:10px;padding:12px 18px;text-align:center;flex:1}
.meter span{display:block;color:var(--muted);font-size:12px}
.meter b{font-size:22px}

.lista{list-style:none;padding:0;margin:8px 0 0}
.lista li{padding:6px 0;border-bottom:1px solid var(--line)}

/* Estado dots / badges */
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;vertical-align:middle}
.dot-green{background:var(--green)} .dot-red{background:var(--red)} .dot-gray{background:var(--muted)}
.badge{padding:2px 8px;border-radius:6px;font-size:11px;font-weight:700}
.badge-red{background:var(--red);color:#fff}

.alert{background:#7f1d1d;color:#fee2e2;padding:10px 12px;border-radius:8px;margin:10px 0}
.alert.ok{background:#14532d;color:#dcfce7}
.foot{text-align:center;color:var(--muted);padding:24px;font-size:12px}

/* Explorador dinámico */
.exp-cargando{display:flex;align-items:center;gap:10px;color:var(--muted);padding:18px}
.exp-barra{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:10px 0}
.exp-lista{max-height:320px;overflow:auto;border:1px solid var(--line);border-radius:8px}
.spinner{width:18px;height:18px;border:3px solid var(--line);border-top-color:var(--brand);
  border-radius:50%;display:inline-block;animation:girar .8s linear infinite}
@keyframes girar{to{transform:rotate(360deg)}}