:root{
  --navy-900:#062544;
  --navy-800:#0A3868;
  --navy-100:#E8EEF6;
  --orange-500:#F5741B;
  --orange-600:#DB640F;
  --paper:#F6F8FB;
  --ink:#16202E;
  --ink-soft:#4B5A6C;
  --line:#DCE3EC;
  --white:#FFFFFF;
  --green:#1F9D5C;
  --green-bg:#E8F8EF;
  --red:#C0392B;
  --red-bg:#FDECEA;
  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Inter', sans-serif;
  --font-mono:'JetBrains Mono', monospace;
}
*{box-sizing:border-box;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:var(--font-display);color:var(--navy-900);margin:0;}
a{color:inherit;}
button, input, select, textarea{font-family:inherit;}

/* Layout */
header.bit-header{
  background:var(--navy-900);color:#fff;
  padding:16px 24px;
  display:flex;align-items:center;justify-content:space-between;
  position:sticky;top:0;z-index:20;
  flex-wrap:wrap;gap:10px;
}
header.bit-header .brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:16px;}
header.bit-header .brand .tag{
  font-family:var(--font-mono);font-size:11px;font-weight:400;
  color:var(--orange-500);letter-spacing:.05em;text-transform:uppercase;
}
header.bit-header nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
header.bit-header nav a{font-size:13.5px;color:#B9C6D8;text-decoration:none;font-weight:500;}
header.bit-header nav a:hover, header.bit-header nav a.active{color:#fff;}
header.bit-header .user{font-size:13px;color:#8CA0B8;font-family:var(--font-mono);}

main.bit-main{max-width:1180px;margin:0 auto;padding:28px 20px 80px;}

.card{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:22px;margin-bottom:20px;}
.card h2{font-size:16px;margin-bottom:16px;}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 18px;border-radius:7px;font-weight:600;font-size:14px;
  border:1.5px solid transparent;cursor:pointer;text-decoration:none;
  transition:transform .1s ease, background .15s ease;
}
.btn-primary{background:var(--orange-500);color:#fff;}
.btn-primary:hover{background:var(--orange-600);}
.btn-outline{border-color:var(--line);color:var(--navy-800);background:#fff;}
.btn-outline:hover{border-color:var(--navy-800);}
.btn-danger{background:var(--red-bg);color:var(--red);border-color:#F3C7C1;}
.btn-danger:hover{background:#FBDAD5;}
.btn-sm{padding:6px 12px;font-size:12.5px;}

/* Forms */
.field{margin-bottom:14px;}
.field label{display:block;font-size:12.5px;font-weight:600;color:var(--ink-soft);margin-bottom:5px;}
.field input, .field select, .field textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:6px;font-size:14px;background:#fff;
}
.field textarea{min-height:70px;resize:vertical;}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;}

/* Table */
table.bit-table{width:100%;border-collapse:collapse;font-size:13.5px;}
table.bit-table th{
  text-align:left;font-family:var(--font-mono);font-size:11px;text-transform:uppercase;
  letter-spacing:.04em;color:var(--ink-soft);padding:10px 12px;border-bottom:2px solid var(--line);
  white-space:nowrap;
}
table.bit-table td{padding:12px;border-bottom:1px solid var(--line);vertical-align:top;}
table.bit-table tr:hover td{background:var(--paper);}
.badge{
  display:inline-block;padding:3px 9px;border-radius:20px;font-size:11.5px;font-weight:600;
}
.badge-visita{background:#EAF2FF;color:#1D5FBF;}
.badge-mantencion{background:#FFF3E0;color:#B96A00;}
.badge-otro{background:#EFEFEF;color:#555;}
.badge-curso{background:var(--green-bg);color:var(--green);}

.filters{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end;margin-bottom:18px;}
.filters .field{margin-bottom:0;min-width:150px;}

.empty-state{text-align:center;padding:50px 20px;color:var(--ink-soft);}

.toast{background:var(--green-bg);border:1px solid #8FDCB0;color:#1F6E42;padding:12px 16px;border-radius:8px;margin-bottom:18px;font-size:14px;}
.toast-error{background:var(--red-bg);border-color:#F3C7C1;color:var(--red);}

.summary-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px;}
.summary-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;}
.summary-card .label{font-family:var(--font-mono);font-size:11px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.04em;}
.summary-card .value{font-family:var(--font-display);font-size:22px;color:var(--navy-900);margin-top:6px;}

/* Login */
.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:16px;}
.login-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:36px;width:100%;max-width:360px;}
.login-card h1{font-size:18px;margin-bottom:4px;}
.login-card p.sub{color:var(--ink-soft);font-size:13.5px;margin:0 0 22px;}

@media (max-width:820px){
  .row2, .row3{grid-template-columns:1fr;}
  .summary-cards{grid-template-columns:1fr 1fr;}
  table.bit-table{display:block;overflow-x:auto;white-space:nowrap;}
}
@media (max-width:520px){
  .summary-cards{grid-template-columns:1fr;}
  header.bit-header nav{gap:12px;}
}