Learn CSS with Real Code Examples

body, html {
    height: 100%;
    margin: 0;
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background: #f0f0f0;
}

.box {
    width: 200px;
    height: 200px;
    background: #007bff;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
}

Centers content horizontally and vertically using Flexbox.

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    padding: 1rem;
}

.gallery img {
    width: 100%;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.gallery img:hover {
    transform: scale(1.05);
}

Creates a responsive image gallery using CSS Grid.

:root {
    --primary-color: #ff6347;
    --secondary-color: #4caf50;
}

body {
    background: var(--secondary-color);
    color: white;
    font-family: sans-serif;
}

.button {
    background: var(--primary-color);
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    color: white;
    cursor: pointer;
    transition: background 0.3s ease;
}

.button:hover {
    background: darken(var(--primary-color), 10%);
}

Demonstrates using CSS custom properties for color theming.

.card {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

Adds a smooth scale-up effect on card hover using transitions.

.ripple-button {
    position: relative;
    overflow: hidden;
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    background: #007bff;
    color: white;
    cursor: pointer;
}

.ripple-button::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.3);
    top: 0;
    left: 0;
    transform: scale(0);
    border-radius: 50%;
    transition: transform 0.5s, opacity 1s;
}

.ripple-button:active::after {
    transform: scale(2);
    opacity: 0;
    transition: 0s;
}

Creates a ripple effect on button click using pseudo-elements and transitions.

h1 {
    font-size: clamp(1.5rem, 2vw + 1rem, 3rem);
}
p {
    font-size: clamp(1rem, 1.5vw + 0.5rem, 1.5rem);
}

Adjusts font sizes dynamically using clamp() for responsive text.

.cards {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.card {
    flex: 1 1 200px;
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

Arranges multiple cards in a responsive Flexbox layout.

.loader {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

Creates a spinning loader using keyframes animation.

body {
    background: linear-gradient(135deg, #007bff, #6c757d);
    color: white;
    font-family: sans-serif;
}

.radial-box {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, #ff6347, #ffeb3b);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
}

Uses linear and radial gradients for backgrounds.

header {
    position: sticky;
    top: 0;
    background: #007bff;
    color: white;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 1000;
}

Demonstrates a sticky header that stays visible while scrolling.