:root {
  --ink: #1a1a1a;
  --paper: #f4f3ef;
  --navy: #11448e;
  --lime: #c2d227;
  --danger: #b23b2e;
  --line: #d8d5cd;
  --ok: #2e6b3e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
}
.topbar {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.9rem 1.5rem;
  background: var(--navy);
  color: var(--paper);
  border-bottom: 3px solid var(--lime);
}
.brand { font-weight: 700; letter-spacing: 0.08em; font-size: 1.1rem; }
.brand span { color: var(--lime); }
.topbar nav { display: flex; gap: 1.2rem; flex: 1; }
.topbar nav a { color: var(--paper); text-decoration: none; font-size: 0.92rem; }
.topbar nav a:hover { color: var(--lime); }
.logout-form { display: flex; align-items: center; gap: 0.8rem; }
.user-tag { font-size: 0.85rem; opacity: 0.8; }
.topbar button {
  background: transparent; border: 1px solid var(--paper); color: var(--paper);
  padding: 0.3rem 0.7rem; cursor: pointer; font-size: 0.8rem;
}
main { padding: 1.6rem 2rem; max-width: 1200px; margin: 0 auto; }
h1, h2, h3 { font-weight: 600; }
h1 { font-size: 1.4rem; border-bottom: 2px solid var(--navy); padding-bottom: 0.4rem; }
table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; background: #fff; }
th, td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--line); font-size: 0.88rem; }
th { background: var(--navy); color: var(--paper); font-weight: 500; }
tr.alerta { background: #fbeceb; }
.badge { padding: 0.15rem 0.5rem; font-size: 0.75rem; border: 1px solid var(--line); border-radius: 2px; }
.badge-rojo { background: var(--danger); color: #fff; border-color: var(--danger); }
.card {
  background: #fff; border: 1px solid var(--line); padding: 1.2rem; margin-bottom: 1.2rem;
}
form.inline { display: inline; }
label { display: block; font-size: 0.8rem; margin: 0.5rem 0 0.2rem; opacity: 0.75; }
input, select, textarea {
  width: 100%; padding: 0.45rem; border: 1px solid var(--line); font-size: 0.9rem; background: #fff;
}
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 1.2rem; }
.actions { margin-top: 1rem; display: flex; gap: 0.6rem; }
button, .btn {
  background: var(--navy); color: #fff; border: none; padding: 0.55rem 1.1rem;
  cursor: pointer; font-size: 0.88rem; text-decoration: none; display: inline-block;
}
button.secondary, .btn.secondary { background: transparent; color: var(--navy); border: 1px solid var(--navy); }
button.danger { background: var(--danger); }
.tabs { display: flex; gap: 0.2rem; margin-bottom: 1rem; border-bottom: 1px solid var(--line); }
.tabs a { padding: 0.5rem 1rem; text-decoration: none; color: var(--ink); font-size: 0.88rem; }
.tabs a.active { border-bottom: 3px solid var(--lime); font-weight: 600; color: var(--navy); }
.flash { padding: 0.7rem 1rem; margin-bottom: 1rem; }
.flash-error { background: #fbeceb; border-left: 3px solid var(--danger); }
.flash-info { background: #eef3fa; border-left: 3px solid var(--navy); }
.stat { font-size: 2rem; font-weight: 700; }
.stat-label { font-size: 0.8rem; opacity: 0.7; }
.toggle-row { display: flex; align-items: center; gap: 0.6rem; }
.toggle-row input[type=checkbox] { width: auto; }
.login-box {
  max-width: 340px; margin: 4rem auto; background: #fff; border: 1px solid var(--line); padding: 2rem;
}
.table-wrap { overflow-x: auto; }

@media (max-width: 720px) {
  .topbar { flex-wrap: wrap; gap: 0.6rem; padding: 0.7rem 1rem; }
  .topbar nav { flex-basis: 100%; order: 3; gap: 0.9rem; overflow-x: auto; }
  .logout-form { margin-left: auto; }
  main { padding: 1rem; }
  .grid { grid-template-columns: 1fr; }
  table { display: block; overflow-x: auto; white-space: nowrap; }
  .login-box { margin: 2rem auto; max-width: 90%; }
}