body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f4f6f8;
}

header {
    background: #0a5fa3;
    color: white;
    padding: 20px;
    text-align: center;
}

nav {
    background: #083f6b;
    display: flex;
    flex-wrap: wrap;
}

nav button {
    flex: 1;
    padding: 14px;
    border: none;
    background: #083f6b;
    color: white;
    cursor: pointer;
    min-width: fit-content;
}

nav button:hover {
    background: #0a5fa3;
}

section {
    display: none;
    padding: 20px;
}

section.active {
    display: block;
}

img {
    max-width: 100%;
    height: auto;
}

canvas {
    border: 1px solid #333;
    margin-top: 10px;
}

.card {
    background: white;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1)
}

footer {
    background: #083f6b;
    color: white;
    text-align: center;
    padding: 10px;
}

input,
button,
select {
    margin: 5px;
    padding: 5px;
}