body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f8ff;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    background-color: #343a40;
    color: white;
    width: 100%;
    text-align: center;
    padding: 20px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header h1 {
    color: white;
    margin: 0;
}

#calculator {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    width: 90%;
    max-width: 1200px;
    margin: 20px 0;
}

.input-container {
    flex: 1 1 300px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin: 10px;
}

.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-bottom: 10px;
}

input[type="range"] {
    width: 100%;
}

#results {
    flex: 1 1 300px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin: 10px;
}

#results h2 {
    margin-top: 0;
}

#mat-value {
    font-size: 1.5em;
    color: #007bff;
    font-weight: bold;
}

#chart-container {
    flex: 1 1 300px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
}

@media (max-width: 768px) {
    #calculator {
        flex-direction: column;
    }
}