body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f0f2f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: #333;
}

.video-container {
    display: flex;
    justify-content: space-around;
    margin: 20px 0;
    flex-wrap: wrap;
}

.video-box {
    margin: 10px;
    text-align: center;
}

video {
    width: 400px;
    height: 300px;
    background: black;
    border: 2px solid #ccc;
    border-radius: 8px;
}

.controls {
    text-align: center;
    margin: 20px 0;
}

button {
    padding: 10px 20px;
    margin: 5px;
    font-size: 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#startBtn {
    background-color: #4CAF50;
    color: white;
}

#acceptBtn {
    background-color: #2196F3;
    color: white;
}

#hangupBtn {
    background-color: #f44336;
    color: white;
}

#acceptBtn:disabled,
#hangupBtn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

.status {
    text-align: center;
    margin: 10px 0;
    padding: 10px;
    border-radius: 4px;
}

.status.connected {
    background-color: #dff0d8;
    color: #3c763d;
}

.status.disconnected {
    background-color: #f2dede;
    color: #a94442;
}

.section {
    background-color: white;
    margin: 20px 0;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.input-area {
    width: calc(100% - 20px);
    height: 40px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: vertical;
}

.btn-group {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
}

.copy-btn {
    background-color: #ff9800;
    color: white;
}

.paste-btn {
    background-color: #9c27b0;
    color: white;
}

label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}