body {
    font-family: 'Inter', Arial, sans-serif;
    background-color: #121212;
    color: #ffffff;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    text-align: center;
    background: #1e1e1e;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 800px;
}

h1 {
    margin-bottom: 20px;
    color: #00e5ff;
}

.room-controls {
    margin-bottom: 25px;
    display: flex;
    justify-content: center;
    gap: 10px;
}

#roomIdInput {
    padding: 12px;
    border-radius: 8px;
    border: none;
    font-size: 16px;
    width: 250px;
    outline: none;
    background: #333;
    color: #fff;
}

#roomIdInput::placeholder {
    color: #aaa;
}

#joinBtn { background: #ff9800; color: white; }
#joinBtn:hover { background: #f57c00; }

.video-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.video-wrapper {
    position: relative;
    background: #000;
    border-radius: 10px;
    overflow: hidden;
    width: 100%;
    max-width: 350px;
    aspect-ratio: 4/3;
    border: 2px solid #333;
}

video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.label {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.6);
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 14px;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 15px;
}

button {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

#startBtn { background: #2196f3; color: white; }
#startBtn:hover { background: #1976d2; }

#callBtn { background: #4caf50; color: white; }
#callBtn:hover { background: #388e3c; }

#hangupBtn { background: #f44336; color: white; }
#hangupBtn:hover { background: #d32f2f; }

#leaveBtn { background: #e91e63; color: white; }
#leaveBtn:hover { background: #c2185b; }

button:disabled {
    background: #555 !important;
    color: #888;
    cursor: not-allowed;
}