:root{
  --azul:#005a8c; --azul-osc:#0b3d66; --teal:#0e8c7f; --naranja:#e8843c;
  --fondo:#0e1622; --panel:#16222f; --panel2:#1c2c3d; --texto:#dfe8f0; --gris:#8fa3b5;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Segoe UI',Arial,sans-serif;background:var(--fondo);color:var(--texto);display:flex;min-height:100vh}
.sidebar{width:250px;min-width:250px;background:var(--panel);height:100vh;position:sticky;top:0;overflow-y:auto;padding:14px 10px;border-right:1px solid #24384c}
.brand{font-size:20px;font-weight:800;margin-bottom:16px;padding:4px 8px}
.brand .logo{color:#fff;background:var(--azul);border-radius:6px;padding:1px 7px}
.brand .tag{display:block;font-size:10px;color:var(--gris);letter-spacing:3px;text-transform:uppercase;margin-top:4px}
.nav-item{display:block;color:var(--texto);text-decoration:none;padding:8px 10px;border-radius:6px;margin:2px 0;font-size:14px}
.nav-item:hover{background:var(--panel2)}
.nav-item.admin{color:var(--naranja)}
.nav-item.salir{margin-top:18px;color:var(--gris);font-size:12px}
.menu-group{margin:2px 0}
.menu-toggle{width:100%;text-align:left;background:none;border:none;color:var(--teal);font-size:13px;font-weight:700;padding:7px 10px;cursor:pointer;border-radius:6px}
.menu-toggle:hover{background:var(--panel2)}
.submenu{display:none;padding-left:8px}
.sub-item{display:block;color:var(--texto);text-decoration:none;font-size:12.5px;padding:5px 10px;border-left:2px solid #24384c;margin:1px 0}
.sub-item:hover{border-left-color:var(--naranja);background:var(--panel2)}
.content{flex:1;padding:26px 34px;max-width:1100px}
.content-solo{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px}
h1{color:#fff;font-size:24px;margin-bottom:14px}
h2{color:var(--azul);font-size:17px;margin:18px 0 8px;color:#7db6d9}
h3{font-size:14px;margin:12px 0 6px;color:#fff}
.card{background:var(--panel);border:1px solid #24384c;border-radius:10px;padding:16px 18px;margin-bottom:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.metric{background:var(--panel2);border-radius:8px;padding:10px 14px}
.metric .k{font-size:11px;color:var(--gris);text-transform:uppercase;letter-spacing:1px}
.metric .v{font-size:17px;font-weight:700;color:#fff;word-break:break-word}
table{border-collapse:collapse;width:100%;font-size:13px;margin:8px 0}
th{background:var(--azul);color:#fff;text-align:left;padding:6px 9px}
td{padding:5px 9px;border-bottom:1px solid #24384c}
tr:hover td{background:var(--panel2)}
input,select,textarea{width:100%;padding:8px 10px;border-radius:6px;border:1px solid #33506b;background:#0d1622;color:var(--texto);font-size:14px;margin:3px 0 10px}
label{font-size:12.5px;color:var(--gris)}
button,.btn{background:var(--azul);color:#fff;border:none;border-radius:7px;padding:9px 18px;font-size:14px;cursor:pointer;text-decoration:none;display:inline-block}
button:hover,.btn:hover{filter:brightness(1.15)}
.btn.sec{background:var(--panel2);border:1px solid #33506b}
.btn.mini{padding:4px 10px;font-size:12px}
.btn.peligro{background:#8c2f39}
.flash{padding:10px 16px;border-radius:8px;margin-bottom:12px;font-size:14px}
.flash.ok{background:#0e4d3a;border:1px solid var(--teal)}
.flash.error{background:#5a1f28;border:1px solid #a33}
.flash.warn{background:#5a4a1f;border:1px solid #b90}
.aviso{background:#233246;border-left:3px solid var(--naranja);padding:8px 12px;border-radius:6px;font-size:13px;margin:6px 0}
.fig{background:#fff;border-radius:8px;padding:8px;margin:10px 0;text-align:center}
.fig img{max-width:100%}
.pie{margin-top:40px;font-size:11px;color:var(--gris)}
.login-card{background:var(--panel);border:1px solid #24384c;border-radius:12px;padding:32px;width:340px}
.login-card h1{text-align:center}
.chips a{margin:2px 4px 2px 0;display:inline-block}
@media(max-width:800px){.sidebar{position:fixed;z-index:9;transform:translateX(-100%)}body{flex-direction:column}}