<!DOCTYPE html>
<html lang="ko">
<head>
<style>
.g-box {
display: grid;
grid-template-columns: 1fr 1fr 1fr;
grid-gap: 20px 5px;
}
.g-box div {
border: 1px solid black;
}
</style>
</head>
<body>
<div class="g-box">
<div>1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<div>5</div>
<div>6</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<style>
.grid-container {
background-color: #2196f3;
padding: 10px;
display: grid;
grid-template-columns: 1fr 1fr 1fr;
}
.grid-item {
background-color: #90c9f8;
padding: 20px;
border: 1px solid black;
}
</style>
</head>
<body>
<div class="grid-container">
<div class="grid-item">1</div>
<div class="grid-item">2</div>
<div class="grid-item">3</div>
<div class="grid-item">4</div>
<div class="grid-item">5</div>
<div class="grid-item">6</div>
<div class="grid-item">7</div>
<div class="grid-item">8</div>
<div class="grid-item">9</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<style>
.grid-container {
background-color: #2196f3;
padding: 10px;
}
.grid-item {
background-color: #90c9f8;
padding: 20px;
border: 1px solid black;
}
</style>
</head>
<body>
<div class="grid-container">
<div class="grid-item">1</div>
<div class="grid-item">2</div>
<div class="grid-item">3</div>
<div class="grid-item">4</div>
<div class="grid-item">5</div>
<div class="grid-item">6</div>
<div class="grid-item">7</div>
<div class="grid-item">8</div>
<div class="grid-item">9</div>
</div>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
<style>
.grid-container {
background-color: #2196f3;
padding: 10px;
display: grid;
grid-template-columns: 1fr 3fr 1fr;
}
.grid-item {
background-color: #90c9f8;
padding: 20px;
border: 1px solid black;
}
.header {
grid-column: 1 / 3 span;
}
.footer {
grid-column: 1 / 3 span;
}
</style>
</head>
<body>
<div class="grid-container">
<div class="grid-item header">1</div>
<div class="grid-item nav">2</div>
<div class="grid-item section">3</div>
<div class="grid-item aside">4</div>
<div class="grid-item footer">5</div>
</div>
</body>
</html>

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