.i3k-hash-calculator {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 25px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    max-width: 480px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.i3k-hash-calculator label{
    color: white;
    font-size: 14px;
    font-weight: 600;
}
.i3k-hash-calculator legend {
    color: yellow;
    font-size: 18px;
    font-weight: 600;
}
.i3k-hash-calculator input[type="text"] {
    width: 90%;
    padding: 10px;
    margin: 4px 0 10px;
    font-family: Roboto;
    font-size: 14px;
    border: none;
    border-radius: 6px;
}
.i3k-hash-calculator select {
    width: 90%;
    padding: 10px;
    margin: 4px 0 10px;
    font-family: Roboto;
    font-size: 14px;
    border: none;
    border-radius: 6px;
}
.i3k-hash-calculator fieldset {
    border: none;
    background: rgba(255,255,255,0.05);
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
}
.i3k-hash-calculator fieldset label {
    display: block;
    margin-bottom: 6px;
}
.i3k-hash-calculator fieldset legend {
    text-align: center;
    width: 100%;
    display: block;
}
.i3k-hash-calculator button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    height: 44px;
    line-height: 1.2;
    font-size: 16px;
    font-weight: 600;
    border: 2px solid rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.2);
    color: yellow;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.i3k-hash-calculator button:hover {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.5);
    transform: translateY(-5px);
}
@media (max-width: 600px) {
    .i3k-hash-calculator {
        padding: 20px;
    }
}
#hash-message.error { background: rgba(255,0,0,0.2); border: 1px solid red; color: orange; }