:root{
  --bg:#f4f7f8; --panel:#ffffff; --ink:#0f2933; --muted:#5b7480;
  --brand:#0e5a6b; --brand-2:#1aa39a; --line:#e2ebee; --danger:#c0392b;
  --ok:#1e8a5f; --warn:#b7791f;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:14px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0 0 12px}
.container{max-width:1200px;margin:0 auto;padding:20px}

/* Layout panel profesional */
.layout{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.sidebar{background:var(--brand);color:#fff;padding:20px 0;position:sticky;top:0;height:100vh}
.sidebar .brand{font-size:20px;font-weight:700;padding:0 20px 20px;border-bottom:1px solid rgba(255,255,255,.15)}
.sidebar .brand span{color:var(--brand-2)}
.sidebar nav a{display:block;padding:12px 20px;color:#d8ecef;border-left:3px solid transparent}
.sidebar nav a:hover,.sidebar nav a.active{background:rgba(0,0,0,.15);color:#fff;border-left-color:var(--brand-2);text-decoration:none}
.main{padding:24px 32px}
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}
.topbar .user{color:var(--muted)}

/* Cards */
.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:20px;margin-bottom:16px}
.card h2{font-size:16px;color:var(--brand);margin-bottom:16px}

/* Tabla */
table{width:100%;border-collapse:collapse;background:var(--panel)}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line)}
th{background:#eaf1f3;color:var(--brand);font-weight:600;font-size:12px;text-transform:uppercase}
tr:hover td{background:#f8fbfc}

/* Forms */
label{display:block;margin:12px 0 4px;font-weight:600;color:var(--muted);font-size:12px;text-transform:uppercase}
input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:6px;background:#fff;font:inherit;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(26,163,154,.15)}
textarea{resize:vertical;min-height:80px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}

/* Botones */
.btn{display:inline-block;padding:9px 16px;background:var(--brand);color:#fff;border:none;border-radius:6px;cursor:pointer;font:inherit;font-weight:600}
.btn:hover{background:#0a4551;text-decoration:none;color:#fff}
.btn.secondary{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn.ok{background:var(--ok)}
.btn.danger{background:var(--danger)}
.btn.sm{padding:5px 10px;font-size:12px}

/* Badges */
.badge{display:inline-block;padding:3px 8px;border-radius:12px;font-size:11px;font-weight:600;background:#eaf1f3;color:var(--brand)}
.badge.ok{background:#dcf1e6;color:var(--ok)}
.badge.warn{background:#fbf1d9;color:var(--warn)}
.badge.danger{background:#f8dcd8;color:var(--danger)}
.badge.muted{background:#e8edef;color:var(--muted)}

/* Flash */
.flash{padding:12px 16px;border-radius:6px;margin-bottom:16px;font-weight:600}
.flash.success{background:#dcf1e6;color:var(--ok)}
.flash.error{background:#f8dcd8;color:var(--danger)}
.flash.info{background:#dbeef2;color:var(--brand)}

/* Login page */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2))}
.login-card{background:#fff;padding:32px;border-radius:12px;width:100%;max-width:380px;box-shadow:0 12px 40px rgba(0,0,0,.15)}
.login-card h1{color:var(--brand);text-align:center;margin-bottom:6px}
.login-card p.sub{text-align:center;color:var(--muted);margin-bottom:24px}

/* Portal (mobile-first) */
.portal-header{background:var(--brand);color:#fff;padding:14px 20px;display:flex;justify-content:space-between;align-items:center}
.portal-header .brand{font-weight:700;font-size:18px}
.portal-header nav a{color:#d8ecef;margin-left:14px}
.portal-main{max-width:720px;margin:0 auto;padding:20px}

/* Tabs simples */
.tabs{display:flex;gap:4px;border-bottom:2px solid var(--line);margin-bottom:20px;flex-wrap:wrap}
.tabs a{padding:10px 16px;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-2px;font-weight:600}
.tabs a.active{color:var(--brand);border-bottom-color:var(--brand-2)}

/* Utilidades */
.right{text-align:right}
.muted{color:var(--muted)}
.mt{margin-top:16px}
.print-only{display:none}
@media print{
  .no-print,.sidebar,.topbar{display:none !important}
  .layout{display:block}
  .main{padding:0}
  .print-only{display:block}
  body{background:#fff}
}
@media (max-width:800px){
  .layout{grid-template-columns:1fr}
  .sidebar{position:relative;height:auto}
  .row,.row-3{grid-template-columns:1fr}
}