/* ── Reset y base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f1117;
  --surface:   #1a1d27;
  --surface2:  #22263a;
  --border:    #2e3350;
  --text:      #e8eaf0;
  --muted:     #7b82a0;
  --primary:   #4f6ef7;
  --primary-h: #3a57d4;
  --success:   #22c55e;
  --warning:   #f59e0b;
  --danger:    #ef4444;
  --sidebar-w: 220px;
  --radius:    10px;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }

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

.sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.sidebar-logo {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar-logo .marca { font-size: 16px; font-weight: 700; color: var(--text); }
.sidebar-logo .sub   { font-size: 11px; color: var(--muted); margin-top: 2px; }

.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px;
  color: var(--muted);
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all .15s;
  text-decoration: none;
  font-size: 13.5px;
}
.nav-item:hover { color: var(--text); background: var(--surface2); }
.nav-item.active { color: var(--primary); border-left-color: var(--primary); background: rgba(79,110,247,.08); }
.nav-item svg { width: 16px; height: 16px; flex-shrink: 0; }

.sidebar-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
}
.usuario-info { font-size: 12px; color: var(--muted); }
.usuario-info .nombre { color: var(--text); font-weight: 500; font-size: 13px; }
.btn-logout {
  margin-top: 8px;
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 5px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  width: 100%;
  transition: all .15s;
}
.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topbar {
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
}
.topbar h1 { font-size: 18px; font-weight: 600; }

.contenido { padding: 24px 28px; flex: 1; }

/* ── Botones ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 7px;
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all .15s;
}
.btn-primary  { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-h); }
.btn-outline  { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger   { background: transparent; border: 1px solid var(--border); color: var(--danger); }
.btn-danger:hover { background: rgba(239,68,68,.1); border-color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #16a34a; }

/* ── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

/* ── Badges ───────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
}
.badge-blue   { background: rgba(79,110,247,.15); color: #818cf8; }
.badge-green  { background: rgba(34,197,94,.15);  color: #4ade80; }
.badge-yellow { background: rgba(245,158,11,.15); color: #fbbf24; }
.badge-gray   { background: rgba(123,130,160,.15);color: var(--muted); }
.badge-orange { background: rgba(245,158,11,.15);  color: #fb923c; }
.badge-red    { background: rgba(239,68,68,.15);   color: #f87171; }

/* ── Alertas de stock ────────────────────────────────────── */
.alerta-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  min-width: 160px;
}
.alerta-card.alerta-warn   { border-color: rgba(245,158,11,.4); background: rgba(245,158,11,.05); }
.alerta-card.alerta-danger { border-color: rgba(239,68,68,.4);  background: rgba(239,68,68,.05); }
.alerta-nombre { font-weight: 600; font-size: 0.875rem; margin-bottom: 2px; }
.alerta-meta   { color: var(--muted); font-size: 0.75rem; margin-bottom: 6px; }
.alerta-stock  { display: flex; align-items: center; gap: 8px; }

/* ── Tabla ────────────────────────────────────────────────── */
.tabla-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th {
  text-align: left;
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--surface2); }

/* ── Modales ──────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  z-index: 200;
  align-items: center;
  justify-content: center;
}
.modal-overlay.visible { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 480px;
  max-width: 95vw;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-header h2 { font-size: 15px; font-weight: 600; }
.modal-close { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 20px; line-height: 1; }
.modal-close:hover { color: var(--text); }
.modal-body { padding: 20px; }
.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* ── Formularios ──────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 12px; font-weight: 500; color: var(--muted); margin-bottom: 6px; }
.form-control {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 9px 12px;
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: border-color .15s;
}
.form-control:focus { border-color: var(--primary); }
.form-control::placeholder { color: var(--muted); }
select.form-control option { background: var(--surface2); }

/* ── Filtros / búsqueda ───────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.toolbar .buscar {
  flex: 1;
  min-width: 180px;
  max-width: 300px;
}

/* ── Producto acordeón ────────────────────────────────────── */
.producto-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  overflow: hidden;
}
.producto-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  transition: background .15s;
  user-select: none;
}
.producto-header:hover { background: var(--surface2); }
.producto-header .chevron { margin-left: auto; color: var(--muted); transition: transform .2s; }
.producto-header .chevron.abierto { transform: rotate(180deg); }
.producto-nombre { font-weight: 500; font-size: 14px; }
.producto-meta { font-size: 12px; color: var(--muted); margin-top: 2px; }
.producto-body { display: none; border-top: 1px solid var(--border); }
.producto-body.visible { display: block; }
.variantes-tabla { width: 100%; }
.variantes-toolbar {
  padding: 10px 18px;
  display: flex;
  justify-content: flex-end;
  background: rgba(0,0,0,.15);
}

/* ── Alertas ──────────────────────────────────────────────── */
.alerta {
  padding: 10px 14px;
  border-radius: 7px;
  font-size: 13px;
  margin-bottom: 16px;
}
.alerta-error   { background: rgba(239,68,68,.1);  border: 1px solid rgba(239,68,68,.3);  color: #fca5a5; }
.alerta-success { background: rgba(34,197,94,.1);  border: 1px solid rgba(34,197,94,.3);  color: #86efac; }

/* ── Estado vacío ─────────────────────────────────────────── */
.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
}
.empty-icon { font-size: 40px; margin-bottom: 12px; }
.empty p { font-size: 14px; }

/* ── Login ────────────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  width: 360px;
}
.login-box .logo { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.login-box .sub  { color: var(--muted); font-size: 13px; margin-bottom: 28px; }

/* ── Spinner ──────────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }