body {
    font-family: Arial, sans-serif;
    background-color: #f4f6f9;
    color: #333;
    margin: 0;
    padding: 0;
}

header {
    background-color: #1a73e8;
    color: white;
    padding: 1.5em 1em;
    text-align: center;
}

.section {
    margin: 2em auto;
    max-width: 800px;
    padding: 1em;
}

h2 {
    color: #1a73e8;
    border-bottom: 2px solid #1a73e8;
    padding-bottom: 0.2em;
}

ul {
    list-style: none;
    padding: 0;
}

ul li {
    display: flex;
    align-items: center;
    margin-bottom: 0.5em;
    gap: 1rem;
}

ul li img {
    width: 24px;
    height: 24px;
    margin-right: 0.5em;
}

.feature {
    display: flex;
    align-items: center;
    margin-bottom: 1em;
}

.feature img {
    width: 40px;
    height: 40px;
    margin-right: 1em;
}

.diagram {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1em auto;
}

footer {
    text-align: center;
    padding: 1em;
    background-color: #333;
    color: white;
}

ul li i,
.feature i,
.architecture-icon {
    font-size: 1.5em;
    margin-right: 0.5em;
    color: #1a73e8;
}

.feature i {
    font-size: 2em;
}

.architecture-icon {
    display: block;
    margin: 1em auto;
    font-size: 4em;
}