maîtrisez tous les sélecteurs CSS

* {
    margin: 0;
    padding: 0;
    border: 1px dashed #3498db;
}

p {
    color: #e74c3c;
    font-weight: bold;
}

.highlight {
    background: #f9e79f;
    padding: 10px;
    border-radius: 8px;
}

#unique {
    background: #2c3e66;
    color: white;
    padding: 15px;
    border-radius: 8px;
}

input[type="text"] {
    border: 2px solid #3498db;
    padding: 8px;
    border-radius: 6px;
}
input[type="password"] {
    border: 2px solid #e74c3c;
    padding: 8px;
    border-radius: 6px;
}

div p {
    background: #d4f1f9;
    padding: 5px;
}

div > p {
    background: #fdebd0;
    padding: 5px;
}

h4 + p {
    color: #e74c3c;
    font-weight: bold;
}

h4 ~ p {
    background: #d5f5e3;
    padding: 5px;
}

h3, h4, p {
    color: #8e44ad;
    font-style: italic;
}

button:hover {
    background: #e74c3c;
    transform: scale(1.05);
}

input:focus {
    border-color: #2ecc71;
    outline: none;
    box-shadow: 0 0 5px #2ecc71;
}

button:active {
    transform: scale(0.95);
}

li:first-child {
    background: #2ecc71;
    color: white;
}

li:last-child {
    background: #e74c3c;
    color: white;
}

li:nth-child(odd) { background: #d4f1f9; }
li:nth-child(even) { background: #fdebd0; }

li:not(.special) {
    color: #95a5a6;
}

input:checked + label {
    color: #2ecc71;
    text-decoration: line-through;
}

input:disabled {
    background: #ecf0f1;
    cursor: not-allowed;
}

input:required {
    border-left: 3px solid #e74c3c;
}

p::before {
    content: "👉 ";
}

a::after {
    content: " 🔗";
}

p::first-letter {
    font-size: 3em;
    color: #e74c3c;
    float: left;
    margin-right: 5px;
}

p::first-line {
    font-weight: bold;
    color: #2c3e66;
}

p::selection {
    background: #f1c40f;
    color: black;
}