.btc-narrator {
    text-align: center;
    padding: 5px 0;
    margin-bottom: 1px;
}

.btc-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #00afb5;
    border: none;
    color: white;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
    margin-bottom: 10px;
}

.btc-btn:hover {
    transform: scale(1.05);
    background: #008c91;
}

.btc-btn[data-reading="true"] {
    background: #dc3545;
}

.btc-btn i {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btc-progress {
    width: 63%;
    height: 4px;
    background: #e0e0e0;
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto;
}

.btc-bar {
    height: 100%;
    width: 0;
    background: #00afb5;
    transition: width 0.2s;
}