:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --line: #e5e9f0;
  --text: #1a2233;
  --muted: #6b7589;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-soft: #e8efff;
  --ok: #16a34a;
  --ok-soft: #e6f7ec;
  --bad: #dc2626;
  --bad-soft: #fdecec;
  --warn: #d97706;
  --warn-soft: #fff4e0;
  --gray-soft: #eef0f4;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 16px rgba(16, 24, 40, .06);
  --sidebar: 232px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: 26px; } h2 { font-size: 20px; } h3 { font-size: 16px; }
p { margin: 0 0 8px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 26px 0 20px; }
code { font: 500 13px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--gray-soft); padding: 2px 6px; border-radius: 6px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.tiny { font-size: 12px; }
.fuerte { font-weight: 600; color: var(--text); }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
.mt { margin-top: 20px; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.center-row { justify-content: center; }
.grow { flex: 1; }
.scroll-x { overflow-x: auto; }

/* ---------- layout ---------- */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar); flex: 0 0 var(--sidebar); background: #111827; color: #cbd5e1;
  display: flex; flex-direction: column; padding: 18px 14px; position: sticky; top: 0; height: 100vh;
}
.brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; font-size: 16px; padding: 6px 10px 20px; }
.brand:hover { text-decoration: none; }
.brand-icon { font-size: 24px; }
.nav { display: flex; flex-direction: column; gap: 4px; }
.nav a { display: flex; align-items: center; gap: 12px; padding: 11px 12px; border-radius: 10px; color: #cbd5e1; font-weight: 500; font-size: 15px; }
.nav a:hover { background: rgba(255,255,255,.06); color: #fff; text-decoration: none; }
.nav a.active { background: var(--primary); color: #fff; }
.nav .ico { width: 22px; text-align: center; font-size: 17px; }
.sidebar-bottom { margin-top: auto; display: flex; flex-direction: column; gap: 14px; }
.logout { display: flex; justify-content: space-between; align-items: center; padding: 0 6px; }
.link { background: none; border: 0; padding: 0; font: 600 13px Inter, sans-serif; color: #94a3b8; cursor: pointer; }
.link:hover { color: #fff; }

.main { flex: 1; min-width: 0; padding: 28px 36px 60px; }
.topbar { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.page-title { font-size: 26px; }
.topbar-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--card); color: var(--text); border: 1px solid var(--line); border-radius: 11px;
  padding: 10px 16px; font: 600 14px Inter, sans-serif; cursor: pointer; transition: .12s; white-space: nowrap;
}
.btn:hover { background: #f8fafc; border-color: #cfd6e0; text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }
.btn-success { background: var(--ok); border-color: var(--ok); color: #fff; }
.btn-success:hover { background: #15803d; border-color: #15803d; color: #fff; }
.btn-danger { color: var(--bad); border-color: #f5c2c2; background: #fff; }
.btn-danger:hover { background: var(--bad-soft); }
.btn-block { width: 100%; }
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 9px; }
.btn-xl { padding: 14px 20px; font-size: 16px; }

/* ---------- formularios ---------- */
.input {
  width: 100%; background: #fff; border: 1px solid var(--line); border-radius: 11px;
  padding: 10px 13px; font: 400 15px Inter, sans-serif; color: var(--text);
}
.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.input-lg { padding: 13px 15px; font-size: 16px; }
select.input { cursor: pointer; }
textarea.area { min-height: 180px; resize: vertical; line-height: 1.5; font-size: 14px; }
.medidor { margin-top: 5px; min-height: 18px; }
.medidor.bien { color: #15803d; }
.medidor.mal { color: #b91c1c; font-weight: 600; }
.campo { margin-bottom: 16px; }
.campo label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 6px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 16px; }
.form { max-width: 780px; }
.acciones { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
.opciones { display: flex; gap: 10px; flex-wrap: wrap; }
.opcion { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line);
  border-radius: 11px; padding: 10px 15px; cursor: pointer; background: #fff; font-size: 14px; font-weight: 500; }
.opcion:hover { border-color: #cfd6e0; }
.opcion input { accent-color: var(--primary); margin: 0; }
.opcion:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); font-weight: 600; }

.filtros { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.filtros .input { width: auto; }
.filtros .grow { min-width: 240px; }

/* ---------- card / tabla ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 22px; }
.tabla { width: 100%; border-collapse: collapse; }
.tabla th { text-align: left; font-size: 12px; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: .03em; padding: 0 12px 10px; border-bottom: 1px solid var(--line); }
.tabla th.right { text-align: right; }
.tabla td { padding: 13px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.tabla tbody tr:last-child td { border-bottom: 0; }
.tabla tbody tr:hover { background: #fafbfd; }
.card .tabla { margin: -6px 0; }

.pill { display: inline-block; background: var(--gray-soft); color: var(--muted);
  font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.tag { display: inline-block; font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px; }
.tag-verde { background: var(--ok-soft); color: #15803d; }
.tag-azul { background: var(--primary-soft); color: var(--primary-dark); }

/* ---------- avisos ---------- */
.flashes { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.flash { padding: 11px 15px; border-radius: 11px; font-size: 14px; font-weight: 500; }
.flash-ok { background: var(--ok-soft); color: #15803d; }
.flash-error { background: var(--bad-soft); color: #b91c1c; }
.aviso { background: var(--warn-soft); border: 1px solid #f5d9a8; color: #92400e;
  padding: 13px 16px; border-radius: 11px; margin-bottom: 18px; font-size: 14px; }
.aviso a { color: #92400e; font-weight: 600; text-decoration: underline; }

.vacio { text-align: center; padding: 70px 20px; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.vacio-icono { font-size: 46px; margin-bottom: 12px; }
.vacio h2 { margin-bottom: 6px; }
.vacio .row { margin-top: 20px; }

/* ---------- login ---------- */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.login-card { background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  box-shadow: var(--shadow); padding: 34px; width: 100%; max-width: 380px; text-align: center; }
.login-card .campo { text-align: left; margin-top: 16px; }
.login-icono { font-size: 42px; }
.login-card h1 { font-size: 24px; margin-top: 8px; }
.login-card .flash { margin-top: 16px; text-align: left; }
.login-card .btn { margin-top: 22px; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; flex: none; height: auto; position: static; flex-direction: row;
    align-items: center; gap: 12px; padding: 12px 16px; overflow-x: auto; }
  .brand { padding: 0; }
  .brand-text { display: none; }
  .nav { flex-direction: row; }
  .nav a span:not(.ico) { display: none; }
  .sidebar-bottom { margin: 0 0 0 auto; flex-direction: row; align-items: center; gap: 10px; }
  .sidebar-bottom .btn { padding: 8px 12px; font-size: 13px; }
  .logout .small { display: none; }
  .main { padding: 20px 16px 50px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .card { padding: 16px; }
  .tabla thead { display: none; }
  .tabla tbody tr { display: block; padding: 12px 0; border-bottom: 1px solid var(--line); }
  .tabla td { display: flex; justify-content: space-between; gap: 12px; border: 0; padding: 4px 0; }
  .tabla td.right { justify-content: flex-end; padding-top: 10px; }
}