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50 Most Useful CSS3 Snippets

#css #ux #design #ui

Basics & Typography

1. Reset Margin and Padding 

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
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2. Font Family Setup 

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
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3. Custom Font Import 

@import url('https://fonts.googleapis.com/css2?family=Roboto&display=swap');

body {
  font-family: 'Roboto', sans-serif;
}
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4. Text Centering 

.center-text {
  text-align: center;
}
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5. Text Shadow 

h1 {
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}
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Colors & Backgrounds

6. Gradient Background 

.background-gradient {
  background: linear-gradient(45deg, #6a11cb, #2575fc);
}
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7. Background Image Cover 

.hero {
  background-image: url('hero.jpg');
  background-size: cover;
  background-position: center;
}
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8. Opacity Control 

.transparent {
  opacity: 0.7;
}
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9. Box Shadow 

.card {
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}
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10. CSS Variables 

:root {
  --main-color: #3498db;
}

.button {
  background-color: var(--main-color);
}
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Layout & Flexbox

11. Flex Container 

.flex-container {
  display: flex;
  justify-content: center;
  align-items: center;
}
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12. Flex Item Grow 

.flex-item {
  flex-grow: 1;
}
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13. Centering with Flexbox 

.center-flex {
  display: flex;
  justify-content: center;
  align-items: center;
}
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14. Flex Wrap 

.flex-wrap {
  display: flex;
  flex-wrap: wrap;
}
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15. Nesting Flex Items 

.parent {
  display: flex;
}

.child {
  flex: 1 1 auto;
}
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Grid Layout

16. Basic Grid Setup 

.grid-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 10px;
}
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17. Named Grid Areas 

.grid-container {
  display: grid;
  grid-template-areas:
    "header header header"
    "sidebar content content"
    "footer footer footer";
}

.header { grid-area: header; }
.sidebar { grid-area: sidebar; }
.content { grid-area: content; }
.footer { grid-area: footer; }
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18. Auto-Fit Columns 

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
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19. Align Items in Grid 

.grid-container {
  display: grid;
  align-items: center;
  justify-items: center;
}
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20. Grid Row Span 

.grid-item {
  grid-row: span 2;
}
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Buttons & Interactions

21. Simple Button Style 

.button {
  background-color: #007bff;
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
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22. Button Hover Effect 

.button:hover {
  background-color: #0056b3;
}
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23. Smooth Transitions 

.transition {
  transition: all 0.3s ease;
}
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24. Disabled Button 

.button:disabled {
  background-color: grey;
  cursor: not-allowed;
}
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25. Focus Outline Removal (Use With Caution) 

.button:focus {
  outline: none;
}
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Animations & Effects

26. Fade In Animation 

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

.fade-in {
  animation: fadeIn 1s ease forwards;
}
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27. Bounce Animation 

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.bounce {
  animation: bounce 2s infinite;
}
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28. Rotate Animation 

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

.rotate {
  animation: rotate 2s linear infinite;
}
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29. Hover Grow Effect 

.grow:hover {
  transform: scale(1.1);
  transition: transform 0.3s ease;
}
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30. Text Blink Animation 

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.blink {
  animation: blink 1s step-start infinite;
}
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Responsive Design

31. Media Query Example 

@media (max-width: 768px) {
  .container {
    flex-direction: column;
  }
}
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32. Responsive Image 

img {
  max-width: 100%;
  height: auto;
}
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33. Hide on Mobile 

@media (max-width: 600px) {
  .desktop-only {
    display: none;
  }
}
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34. Fluid Typography 

h1 {
  font-size: clamp(1.5rem, 2vw, 2.5rem);
}
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35. Container Max Width 

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}
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Shadows & Borders

36. Rounded Corners 

.rounded {
  border-radius: 10px;
}
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37. Circular Image 

.avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
}
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38. Border Gradient 

.border-gradient {
  border: 5px solid;
  border-image-slice: 1;
  border-width: 5px;
  border-image-source: linear-gradient(to left, #743ad5, #d53a9d);
}
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39. Inset Box Shadow 

.inset-shadow {
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.3);
}
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40. Outline on Focus 

input:focus {
  outline: 2px solid #4caf50;
}
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Miscellaneous

41. Cursor Pointer 

.pointer {
  cursor: pointer;
}
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42. Hide Scrollbar (Webkit) 

.hide-scrollbar::-webkit-scrollbar {
  display: none;
}
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43. Text Overflow Ellipsis 

.ellipsis {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
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44. Vertical Align Middle 

.vertical-middle {
  display: inline-block;
  vertical-align: middle;
}
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45. CSS Clip Path Circle 

.clip-circle {
  clip-path: circle(50%);
}
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Programmers Known Features

46. CSS Grid with Fraction Units (fr) 

.grid-fr {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
}
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47. CSS Variables with Fallback 

.element {
  color: var(--primary-color, blue);
}
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48. Centering Absolute Element 

.absolute-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
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49. Flexbox Column Reverse 

.flex-column-reverse {
  display: flex;
  flex-direction: column-reverse;
}
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50. Clamp for Responsive Spacing 

.spacing {
  padding: clamp(10px, 2vw, 20px);
}
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