CSS
Anatomy

CSS selectors target HTML elements for styling. They range from simple element selectors to complex combinations that precisely target specific elements.

/* Element selector */
p {
  color: #333;
}

/* Class selector */
.highlight {
  background: yellow;
}

/* ID selector */
#header {
  font-size: 2rem;
}

The CSS Box Model describes how elements are rendered as boxes with content, padding, borders, and margins.

.box {
  width: 200px;
  height: 100px;
  padding: 20px;
  border: 2px solid blue;
  margin: 10px;
  box-sizing: border-box;
}

Flexbox is a powerful layout system for arranging elements in one dimension (row or column) with flexible sizing and alignment.

.container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.item {
  flex: 1;
}

CSS Grid is a two-dimensional layout system that allows you to create complex layouts with rows and columns.

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.featured {
  grid-column: span 2;
}

CSS provides multiple ways to define colors and create beautiful gradients for backgrounds and elements.

.solid {
  background: #4C51BF;
}

.gradient {
  background: linear-gradient(
    135deg,
    #667eea 0%,
    #764ba2 100%
  );
}

.rgba {
  background: rgba(255, 0, 0, 0.5);
}

CSS animations and transitions bring your designs to life with smooth, performant motion effects.

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.animated {
  animation: fadeIn 1s ease-in;
}