:root {
  --bg: #0b0d12;
  --bg-elevated: #12151c;
  --sidebar-bg: #0e1015;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e7e9ee;
  --text-muted: #8b93a7;
  --red: #e11d2e;
  --red-dark: #b5121f;
  --green: #22c55e;
  --amber: #f2b705;
  --radius: 10px;
}

* { box-sizing: border-box; }

/* El atributo `hidden` debe ganarle a cualquier `display` declarado aquí.
   Sin esta regla, `.modal-overlay { display: flex }` (origen de autor) vence a la
   hoja del navegador y los modales quedan visibles de forma permanente. */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
}

a { color: inherit; text-decoration: none; }

/* ---------- Layout ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 14px;
  flex-shrink: 0;
}

.sidebar-brand { display: flex; align-items: center; gap: 10px; padding: 0 6px 20px; }
.brand-icon { font-size: 26px; }
.sidebar-brand strong { display: block; font-size: 14px; }
.sidebar-brand small { color: var(--text-muted); font-size: 11px; }

.sidebar-nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.sidebar-nav a {
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 14px;
}
.sidebar-nav a:hover { background: rgba(255, 255, 255, 0.04); color: var(--text); }
.sidebar-nav a.active { background: var(--red); color: #fff; font-weight: 600; }

.sidebar-user {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 14px;
  margin-top: 14px;
}
.sidebar-user strong { display: block; font-size: 13px; }
.sidebar-user small { color: var(--text-muted); font-size: 11px; }

.main-content { flex: 1; padding: 28px 32px; overflow-x: hidden; min-width: 0; }

.topbar { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.topbar h1 { margin: 0 0 4px; font-size: 22px; }
.topbar p { margin: 0; color: var(--text-muted); font-size: 13px; }
.topbar-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ---------- KPI cards ---------- */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.kpi-grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.kpi-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.kpi-label { font-size: 12px; color: var(--text-muted); }
.kpi-value { font-size: 24px; font-weight: 700; }
.kpi-delta { font-size: 12px; color: var(--text-muted); }
.delta-up { color: var(--green); }
.delta-down { color: var(--red); }
.kpi-warning { border-color: rgba(225, 29, 46, 0.4); }
.kpi-warning .kpi-value { color: var(--red); }
.kpi-accent { background: linear-gradient(135deg, rgba(225, 29, 46, 0.18), var(--bg-elevated)); border-color: rgba(225, 29, 46, 0.4); }
.kpi-highlight { border-color: rgba(225, 29, 46, 0.3); }

/* ---------- Panels ---------- */
.panel-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
@media (max-width: 900px) {
  .panel-grid { grid-template-columns: 1fr; }
  .sidebar { width: 200px; }
  .main-content { padding: 20px; }
}

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  overflow-x: auto;
}
.panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; flex-wrap: wrap; gap: 10px; }
.panel-header h2 { margin: 0; font-size: 15px; }

/* ---------- Tables ---------- */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th { text-align: left; color: var(--text-muted); font-weight: 600; padding: 10px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.data-table td { padding: 10px 8px; border-bottom: 1px solid var(--border); }
.data-table tbody tr:hover { background: rgba(255, 255, 255, 0.03); }
.empty-state { text-align: center; color: var(--text-muted); padding: 24px !important; }
.text-danger { color: var(--red); font-weight: 600; }

/* ---------- Buttons ---------- */
.btn {
  border: none;
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.btn-primary { background: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-dark); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--red); }
.btn-block { width: 100%; margin-top: 16px; }
.btn-icon { background: transparent; border: none; color: var(--text-muted); cursor: pointer; font-size: 16px; }
.btn-icon:hover { color: var(--red); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ---------- Filtros ---------- */
.filtros { display: flex; gap: 8px; }
.filtro-btn { background: transparent; border: 1px solid var(--border); color: var(--text-muted); padding: 6px 14px; border-radius: 20px; font-size: 12px; cursor: pointer; }
.filtro-btn.active { background: var(--red); border-color: var(--red); color: #fff; }

/* ---------- Badges ---------- */
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 700; letter-spacing: 0.3px; }
.badge-critico { background: rgba(225, 29, 46, 0.18); color: #ff6b7a; }
.badge-atencion { background: rgba(242, 183, 5, 0.18); color: var(--amber); }
.badge-ok { background: rgba(34, 197, 94, 0.18); color: var(--green); }
.badge-alta { background: rgba(34, 197, 94, 0.18); color: var(--green); }
.badge-baja { background: rgba(225, 29, 46, 0.18); color: #ff6b7a; }

/* ---------- Recommendation / signal lists ---------- */
.reco-list { display: flex; flex-direction: column; gap: 10px; }
.reco-item { background: rgba(255, 255, 255, 0.03); border-left: 3px solid var(--text-muted); border-radius: 8px; padding: 12px 14px; font-size: 13px; }
.reco-item strong { display: block; margin-bottom: 4px; }
.reco-item p { margin: 0 0 6px; color: var(--text-muted); }
.reco-item span { font-size: 11px; color: var(--text-muted); }
.reco-item .badge { margin-bottom: 6px; }
.reco-item.reco-critico { border-left-color: var(--red); }
.reco-item.reco-atencion { border-left-color: var(--amber); }
.reco-item.reco-ok { border-left-color: var(--green); }

/* ---------- Forms ---------- */
form label { display: block; font-size: 12px; color: var(--text-muted); margin: 12px 0 6px; }
form input, form select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
}
form input:focus, form select:focus { outline: none; border-color: var(--red); }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-error { color: var(--red); font-size: 12px; margin-top: 10px; }

.item-venta { display: grid; grid-template-columns: 1fr 90px 32px; gap: 8px; align-items: center; margin-bottom: 10px; }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 16px;
}
.modal {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 480px;
  padding: 24px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-header { display: flex; justify-content: space-between; align-items: center; }
.modal-header h2 { margin: 0; font-size: 16px; }

/* ---------- Login ---------- */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: radial-gradient(circle at top, #171a22, #0b0d12); }
.login-card { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 16px; padding: 36px; width: 100%; max-width: 380px; }
.login-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.login-brand-icon { font-size: 30px; }
.login-brand h1 { margin: 0; font-size: 16px; }
.login-brand p { margin: 0; color: var(--text-muted); font-size: 11px; }
.login-card h2 { margin: 0 0 4px; font-size: 20px; }
.login-sub { color: var(--text-muted); font-size: 13px; margin: 0 0 10px; }
.login-demo { margin-top: 22px; border-top: 1px solid var(--border); padding-top: 14px; }
.login-demo p { font-size: 11px; color: var(--text-muted); margin: 0 0 8px; }
.login-demo code { display: block; font-size: 11px; color: var(--text); background: rgba(255, 255, 255, 0.04); padding: 6px 10px; border-radius: 6px; margin-bottom: 6px; }