#An Introduction to Responsive Web Design

Responsive web design ensures that your website looks great on all devices. Key concepts include:

• Fluid Grids
• Flexible Images
• Media Queries

#Fluid Grids

Fluid grids use relative units like percentages for widths...

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}