Récapitulatif des sélecteurs, propriétés et valeurs de style CSS

<link rel="stylesheet" href="style.css">

<style>
  body { background-color: lightblue; }
</style>

<p style="color: red;">Texte rouge.</p>

/* Ceci est un commentaire */
p { color: green; }

* { box-sizing: border-box; }

div {
  width: 150px;
  height: 50px;
}

div {
  padding: 20px;
  background-color: #e0f7fa;
}

div {
  border: 2px solid #004a99;
}

div {
  margin: 20px;
  background-color: #e0f7fa;
}

* {
  box-sizing: border-box;
}

p { 
  font-family: Arial, Helvetica, sans-serif; 
}

p { font-size: 16px; }  /* Absolu */
p { font-size: 1.2rem; } /* Relatif */
p { font-size: 100%; }   /* Relatif */

p { font-weight: normal; } /* ou 400 */
p { font-weight: bold; }   /* ou 700 */

p { font-style: normal; }
p { font-style: italic; }
p { font-style: oblique; }

p { color: red; }                  /* Nom */
p { color: #ff0000; }               /* Hexa */
p { color: rgb(255, 0, 0); }       /* RGB */
p { color: rgba(255, 0, 0, 0.5); } /* RGBA */

p { text-align: justify; }

a { text-decoration: underline; }

p { text-transform: capitalize; }

p { line-height: 1.5; } /* Sans unité (recommandé) */
p { line-height: 24px; }

div { background-color: #e3f2fd; }

body { 
  background-image: url('chemin/vers/image.jpg'); 
}

div { 
  background-repeat: no-repeat;
}

div { 
  background-size: cover;
}

ul { list-style-type: none; }
ul { list-style-type: circle; }
ul { list-style-type: square; }
ol { list-style-type: upper-roman; }

ul { 
  list-style-image: url('puce.png'); 
}

ul { 
  list-style-position: inside;
}

div {
  border: 2px solid #004a99;
}

div {
  border-top: 3px dotted red;
  border-left: 5px solid blue;
}

div {
  border: 2px solid #004a99;
  border-radius: 15px;
}

table { 
  border-collapse: collapse; 
}

table { 
  border-collapse: separate;
  border-spacing: 10px 5px;
}

th, td { 
  padding: 15px;
  text-align: left;
}

td { border-width: 4px; }
td { border-width: thin; }

td { border-style: dotted; }
td { border-style: dashed; }

td { border-color: red; }

tr:nth-child(even) { 
  background-color: #f2f2f2; 
}

div { display: block; }

span { display: inline; }

div { 
  display: inline-block;
  width: 100px;
  height: 50px;
}

.hidden { display: none; }

.container {
  display: flex;
}

.container {
  display: grid;
}

.container {
  display: flex;
  justify-content: space-around;
}

.container {
  display: flex;
  align-items: center;
}

.container {
  display: flex;
  gap: 10px;
}

.container {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr;
  gap: 10px;
}

.box { 
  position: relative; 
  top: 10px;
  left: 20px;
}

.parent { position: relative; }
.child { 
  position: absolute; 
  bottom: 5px; 
  right: 5px;
}

.menu { 
  position: fixed;
  top: 0;
  width: 100%;
}

.header {
  position: sticky;
  top: 0;
}

img {
  float: left;
  margin-right: 10px;
}

div {
  width: 120px; height: 60px;
  border: 1px solid #333;
  overflow: visible;
}

div {
  width: 120px; height: 60px;
  border: 1px solid #333;
  overflow: hidden;
}

div {
  width: 120px; height: 60px;
  border: 1px solid #333;
  overflow: scroll;
}

div {
  width: 120px; height: 60px;
  border: 1px solid #333;
  overflow: auto;
}

div {
  overflow-x: hidden; /* Horizontal */
  overflow-y: scroll; /* Vertical */
  white-space: nowrap; /* Force une ligne */
}

.btn {
  background-color: #004a99;
  /* Cible la propriété à animer */
  transition-property: background-color;
  /* Durée (s=secondes, ms=millisecondes) */
  transition-duration: 0.5s;
}
.btn:hover {
  background-color: #e65100;
}

div {
  transition-duration: 1s;
  /* linear: vitesse constante */
  transition-timing-function: linear;
  /* ease: lent-vite-lent (défaut) */
  transition-timing-function: ease;
}

div {
  transition-duration: 0.5s;
  transition-delay: 1s;
}

/* property | duration | timing | delay */
div {
  transition: all 0.4s ease-in-out;
}
/* Transitions multiples (séparées par virgule) */
div {
  transition: width 1s, background-color 0.3s;
}

@media (max-width: 600px) {
  /* Styles pour les écrans de 600px ou moins */
  body {
    background-color: lightblue;
  }
}