.bitcoin-logo {
    position: relative;
    width: 80px;
    height: 80px;
    background: #5aa9a4;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: white;
    font-size: 36px;
    box-shadow: 0 0 10px rgba(235, 109, 25, 0.5);
}

.bitcoin-logo::after {
    content: "";
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border: 2px dashed rgba(235, 109, 25, 0.5);
    border-radius: 50%;
    animation: spin 20s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Version plus petite pour la navbar */
.bitcoin-logo.navbar {
    width: 50px;
    height: 50px;
    font-size: 24px;
}

.bitcoin-logo.navbar::after {
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    border-width: 1px;
}