body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    text-align: center;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 400px;
}

h1 {
    margin-bottom: 10px;
    color: #333;
}

.input-area {
    display: flex;
    margin-bottom: 20px;
    gap: 10px;
}

input[type="tel"] {
    margin-left: 10px;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
    width: 60%;
}

button {
    padding: 10px 20px;
    border: none;
    background-color: #28a745;
    color: white;
    font-size: 16px;
    cursor: pointer;
    border-radius: 4px;
}

button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0 0 20px 0;
}

ul li {
    background: #f1f1f1;
    padding: 10px;
    margin-bottom: 5px;
    border-radius: 4px;
}

#results {
    margin-top: 20px;
    text-align: left;
}