/* --- ESTILOS COMPARTIDOS --- */
:root {
  --primary-color: #007bff;
  --secondary-color: #28a745;
  --danger-color: #dc3545;
  --background-color: #f4f7f6;
  --sidebar-color: #2c3e50;
  --text-light: #ecf0f1;
  --card-bg: #ffffff;
  --warning-color: #ffc107;
  --info-color: #17a2b8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--background-color);
  line-height: 1.6;
}
.dashboard-container {
  display: flex;
  min-height: 100vh;
}
.sidebar {
  width: 250px;
  background-color: var(--sidebar-color);
  color: var(--text-light);
  padding: 20px;
  box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
}
.logo {
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 30px;
  color: var(--primary-color);
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  padding: 12px 15px;
  color: var(--text-light);
  text-decoration: none;
  border-radius: 5px;
  margin-bottom: 10px;
  transition: background-color 0.3s, color 0.3s;
}
.sidebar-nav a:hover,
.sidebar-nav a.active {
  background-color: #34495e;
  color: var(--primary-color);
}
.sidebar-nav a i {
  margin-right: 10px;
}
.main-content {
  flex-grow: 1;
  padding: 30px;
}
.content-section {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  margin-bottom: 20px;
}
.content-section:not(.active) {
  display: none;
}
h2 {
  color: var(--sidebar-color);
  margin-bottom: 25px;
  border-bottom: 2px solid #eee;
  padding-bottom: 10px;
}
h2 i {
  margin-right: 10px;
  color: var(--primary-color);
}

/* --- Formularios y Elementos --- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}
.form-grid.single-col {
  grid-template-columns: 1fr;
}
.form-group {
  display: flex;
  flex-direction: column;
}
.form-group label {
  margin-bottom: 8px;
  font-weight: 600;
  color: #555;
}
input:not([type="checkbox"]),
select {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 16px;
  transition: border-color 0.3s;
}
input:focus,
select:focus {
  border-color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: bold;
  transition: background-color 0.3s, opacity 0.3s;
}
.primary-btn {
  background-color: var(--primary-color);
  color: white;
}
.primary-btn:hover:not(:disabled) {
  background-color: #0056b3;
}
.secondary-btn {
  background-color: var(--secondary-color);
  color: white;
}
.secondary-btn:hover:not(:disabled) {
  background-color: #218838;
}
.danger-btn {
  background-color: var(--danger-color);
  color: white;
}
.danger-btn:hover:not(:disabled) {
  background-color: #b02a37;
}
.full-width {
  grid-column: 1 / -1;
  margin-top: 10px;
}

/* --- Mensajes y Advertencias --- */
.status-message {
  margin-top: 20px;
  padding: 15px;
  border-radius: 4px;
  font-weight: bold;
  display: none;
}
.status-message.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}
.status-message.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}
.status-message.info {
  background-color: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}
.status-message.warning {
  background-color: #fff3cd;
  color: #856404;
  border: 1px solid #ffeeba;
}

/* Filtro de Producto (Mostrar detalles) */
.product-details {
  margin-top: 15px;
  padding: 15px;
  border-left: 5px solid var(--primary-color);
  background-color: #f8f9fa;
  border-radius: 4px;
}
.product-details p {
  margin: 5px 0;
}
.product-details.hidden {
  display: none;
}

/* Tablas */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}
.data-table th,
.data-table td {
  border: 1px solid #ddd;
  padding: 12px;
  text-align: left;
}
.data-table th {
  background-color: #f2f2f2;
  font-weight: 700;
  color: #333;
}
.data-table tr:nth-child(even) {
  background-color: #f9f9f9;
}

/* Gráficos */
.chart-container {
  width: 100%;
  height: 400px;
  margin: 20px 0;
}

/* Dashboard Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}
.stat-card {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  text-align: center;
  border-left: 4px solid;
}
.stat-card.ventas {
  border-color: var(--primary-color);
}
.stat-card.compras {
  border-color: var(--info-color);
}
.stat-card.ganancias {
  border-color: var(--secondary-color);
}
.stat-card.gastos {
  border-color: var(--danger-color);
}
.stat-value {
  font-size: 2rem;
  font-weight: bold;
  margin: 10px 0;
}
.stat-label {
  color: #666;
  font-size: 0.9rem;
}

/* Responsivo */
@media (max-width: 768px) {
  .dashboard-container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: auto;
    padding: 15px 20px;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  .sidebar .logo {
    margin-bottom: 0;
  }
  .sidebar-nav {
    display: flex;
    overflow-x: auto;
    padding-bottom: 5px;
  }
  .sidebar-nav a {
    padding: 8px 10px;
    flex-shrink: 0;
  }
  .main-content {
    padding: 20px;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}