body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 0;
    padding: 20px;
    direction: rtl;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    box-sizing: border-box;
}

h1 {
    font-size: 24px;
}

input, select, button {
    margin-top: 10px;
    padding: 10px;
    font-size: 16px;
    width: 90%;
    max-width: 300px;
    box-sizing: border-box;
}

h2 {
    font-size: 32px;
    font-weight: bold;
    color: darkblue;
    margin-bottom: 10px;
}

#test-container, #start-screen, #end-screen {
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#graph-container {
    width: 100%;
    max-width: 90%;
    height: 300px;
    position: relative;
    margin-top: 20px;
}

canvas {
    width: 100% !important;
    height: 100% !important;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

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