.hkd-to-usd-converter {
    max-width: 400px;
    margin: 20px auto;
    padding: 20px;
    background: linear-gradient(135deg, #ff6ec4, #7873f5);
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
    font-family: 'Arial', sans-serif;
    color: #fff;
    text-align: center;
}

.hkd-to-usd-converter label {
    display: block;
    margin-bottom: 10px;
    font-size: 1.2em;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.8);
}

.hkd-to-usd-converter input[type="number"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 1em;
    box-shadow: inset 0 0 10px rgba(0, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.hkd-to-usd-converter input[type="number"]:focus {
    outline: none;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.8);
}

.hkd-to-usd-converter button {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    background: #00ffcc;
    color: #1a1a3d;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.hkd-to-usd-converter button:hover {
    background: #ff6ec4;
    color: #fff;
    box-shadow: 0 0 20px rgba(255, 105, 180, 0.8);
}

.hkd-to-usd-converter .result {
    margin-top: 20px;
    font-size: 1.2em;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.8);
}

.hkd-to-usd-converter .error {
    margin-top: 20px;
    color: #ff3333;
    font-size: 1em;
    text-shadow: 0 0 5px rgba(255, 51, 51, 0.8);
}

/* Responsive design */
@media (max-width: 600px) {
    .hkd-to-usd-converter {
        padding: 15px;
        margin: 10px;
    }

    .hkd-to-usd-converter label {
        font-size: 1em;
    }

    .hkd-to-usd-converter input[type="number"],
    .hkd-to-usd-converter button {
        font-size: 0.9em;
    }
}