.ac-calculator {
    max-width: 500px;
    margin: 20px auto;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    padding: 20px;
    font-family: 'Segoe UI', system-ui, sans-serif;
}
.ac-calculator h3 {
    margin: 0 0 15px;
    text-align: center;
    color: #1e293b;
}
.ac-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.ac-field {
    display: flex;
    flex-direction: column;
}
.ac-field label {
    margin-bottom: 5px;
    font-weight: 500;
    color: #334155;
}
.ac-field input, .ac-field select {
    padding: 10px;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    font-size: 14px;
}
.ac-field input:focus, .ac-field select:focus {
    border-color: #22C55E;
    outline: none;
    box-shadow: 0 0 0 3px rgba(34,197,94,0.1);
}
.ac-btn {
    background: #22C55E;
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}
.ac-btn:hover {
    background: #16A34A;
}
.ac-result {
    margin-top: 15px;
    padding: 12px;
    background: #f8fafc;
    border-radius: 12px;
    text-align: center;
    font-size: 15px;
}
@media (max-width: 480px) {
    .ac-calculator { margin: 10px; padding: 15px; }
}