body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    width: 90%;
    max-width: 400px;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    text-align: center;
}

.card {
    border-bottom: 1px solid #eee;
    padding: 20px 0;
}

.card:last-child {
    border-bottom: none;
}

h1, h2 {
    color: #333;
}

input[type="text"], input[type="password"] {
    width: calc(100% - 22px);
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border: none;
    border-radius: 4px;
    background-color: #007bff;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.call-buttons button {
    width: 48%;
    display: inline-block;
}

#hangup-button {
    background-color: #dc3545;
}

#hangup-button:hover {
    background-color: #c82333;
}

#status-message {
    font-weight: bold;
    color: #555;
}

.hidden {
    display: none;
}

#remote-video {
    width: 100%;
    border-radius: 4px;
    margin-top: 20px;
    background-color: #000;
}