body, html {

margin: 0;

padding: 0;

font-family: Arial, sans-serif;

}

.container {

width: 100%;

max-width: 1200px;

margin: 0 auto;

padding: 20px;

box-sizing: border-box;

}

header, footer {

background-color: #f1f1f1;

padding: 10px 20px;

text-align: center;

}

main {

padding: 20px;

text-align: left;

}

img {

max-width: 100%;

height: auto;

}