* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    padding: 20px;
    font-family: Arial, sans-serif;
}

header, main, footer {
    background-color: #f5b9a1;
    border: 2px solid #a52a2a;
    padding: 30px 20px 20px 20px;
    margin-bottom: 20px;
    position: relative;
}

nav {
    background-color: #d2e9af;
    border: 2px solid #5d8233;
    height: 80px;
    position: relative;
}

.main-container {
    display: flex;
    gap: 20px;
    margin-top: 10px;
}

article {
    background-color: #e0e0e0;
    border: 2px solid #444;
    padding: 30px 20px 20px 20px;
    flex: 3;
    position: relative;
}

aside {
    background-color: #e0e0e0;
    border: 2px solid #444;
    flex: 1;
    min-height: 400px;
    position: relative;
}

section {
    background-color: #d0f0fd;
    border: 2px solid #2b7094;
    height: 100px;
    margin-bottom: 15px;
    position: relative;
}

section:last-child {
    margin-bottom: 0;
}

.label {
    position: absolute;
    top: 0;
    left: 0;
    background-color: #444;
    color: white;
    padding: 2px 8px;
    font-size: 14px;
}

header > .label, main > .label, footer > .label {
    background-color: #a52a2a;
}

nav > .label {
    background-color: #5d8233;
}

section > .label {
    background-color: #2b7094;
}