body {
    font-family: Arial, sans-serif;
    background-color: #1a1a1a;
    color: #f4f4f4;
    margin: 0;
    padding: 0;
}

header {
    background-color: #4d4d4d;
    color: #1a1a1a;
    padding: 1.5rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

    header h1 {
        margin: 0;
        font-size: 2rem;
    }

.btc-price {
    font-size: 2rem;
    color: #4d4d4d;
}

nav {
    background-color: #f7931a;
    padding: 1rem;
    text-align: center;
}

    nav a {
        color: #4d4d4d;
        margin: 0 1rem;
        text-decoration: none;
        font-weight: bold;
    }

.content {
    padding: 2rem;
    max-width: 800px;
    margin: auto;
}

h2 {
    color: #f7931a;
}

footer {
    background-color: #4d4d4d;
    color: #ccc;
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
    margin-top: 2rem;
}

.btc-logo {
    width: 40px;
    height: 40px;
}


ul li a {
    color: #f7931a; /* Bitcoin orange for links */
    text-decoration: none; /* Remove underline */
    font-weight: bold;
    transition: color 0.3s ease;
}

    ul li a:hover,
    ul li a:focus {
        color: #4d4d4d; /* Dark gray on hover/focus */
        text-decoration: underline;
        outline: none;
    }

    /* MOBILE */
/* Responsive layout adjustments */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
    }

    .btc-logo {
        width: 32px;
        height: 32px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    nav {
        font-size: 0.95rem;
        padding: 0.75rem;
    }

    .btc-price {
        font-size: 1.5rem;
    }

    .content {
        padding: 1rem;
    }

    table {
        font-size: 0.9rem;
    }

        table th, table td {
            padding: 0.4rem;
        }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.2rem;
    }

    nav {
        font-size: 0.9rem;
    }

    .btc-price {
        font-size: 1.2rem;
    }

    table {
        display: block;
        overflow-x: auto;
    }
}