body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
    line-height: 1.6;
}

h1 {
    color: #333;
    text-align: center;
    margin-top: 30px;
}

p {
    text-align: center;
}

.button-container {
    text-align: center;
    margin-top: 50px;
}

.program-container {
    display: none;
    margin-top: 20px;
}

.program-container.active {
    display: block;
}

button, .button {
    padding: 5px 20px;
    margin: 5px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
}
button.big, .button.big {
    padding: 15px 30px;
    font-size: 18px;
}

button:hover, .button:hover {
    background-color: #0056b3;
}

form {
    max-width: 1024px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

input[type="text"],
input[type="number"] {
    width: 100%;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

canvas {
    display: block;
    margin: 20px auto;
    width: 800px;
    height: 600px;
}

#blendRatios {
    text-align: center;
    margin-top: 20px;
}

#chart-holder {
    text-align: center;
    margin: 20px 0;
    min-height: 400px;
}

#downloadPDF {
    display: none;
    margin: 20px auto;
}

button[disabled] {
    opacity: 0.4;
    cursor:not-allowed;
}

footer {
    margin-top: 40px;
}

h2 {
    margin-top: 30px;
}

.select-box select {
    /* display: block; */
    margin: 10px 0;
    min-width: 180px;
}