body {
    font-family: 'Arial', sans-serif;
    background-color: #f5f5f5;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}
.tabs {
    display: flex;
    margin-bottom: 20px;
}
.tab {
    padding: 10px 20px;
    cursor: pointer;
    background: #4CAF50;
    color: white;
    border: none;
    outline: none;
    margin: 0 5px;
}
.tab.active {
    background: #45a049;
}
.tab-content {
    display: none;
    width: 300px;
    max-width: 100%;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    flex-direction: column;
    align-items: center;
}
.tab-content.active {
    display: flex;
}
h2 {
    color: #4CAF50;
}
h3 {
    color: #333;
}
form {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 300px;
    max-width: 100%;
    margin-bottom: 20px;
}
fieldset {
    border: none;
    margin: 0;
    padding: 0;
}
.radio-buttons {
    display: flex;
    flex-direction: column;
}
.radio-button {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    border: 2px solid #4CAF50;
    border-radius: 4px;
    padding: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
.radio-button input[type="radio"] {
    display: none;
}
.radio-button span {
    margin-left: 10px;
    font-size: 16px;
}
.radio-button.selected {
    background-color: #4CAF50;
    color: #fff;
}
button {
    background: #4CAF50;
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    margin-right: 10px;
}
button:hover {
    background: #45a049;
}
#messageArea {
    margin-bottom: 20px;
    font-weight: bold;
}
.streaks {
    background: #fff;
    padding: 10px 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 300px;
    max-width: 100%;
    text-align: center;
}