.eil_sip_calc_container {
    width: 90%;
    max-width: 500px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #f9f9f9;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1);
}

.eil_sip_calc_container h4 {
    margin-bottom: 2rem;
    text-align: center;
    font-size: 2rem; /* Larger, more prominent */
    font-weight: bold;
    background: linear-gradient(to right, #007bff, #00c4b4); /* Gradient from blue to teal */
    -webkit-background-clip: text; /* Apply gradient to text */
    background-clip: text;
    color: transparent; /* Make text transparent to show gradient */
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1); /* Subtle shadow for depth */
    transition: transform 0.3s ease; /* Slight scale on hover for interactivity */
}

.eil_sip_calc_container h4:hover {
    transform: scale(1.05); /* Slight zoom on hover */
}
.eil_sip_calc_container label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.eil_sip_calc_container input[type="number"] {
    width: 100%;
    padding: 8px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

.calculate-button {
    background-color: #007bff;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

.calculate-button:hover {
    background-color: #0056b3;
}

.calculate-button i {
    margin-right: 5px;
}

.eil_sip_calc_result {
    margin-top: 15px;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    color: #28a745;
}

.eil_sip_calc_container .usage-instructions {
    margin-top: 20px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #f5f5f5;
    font-size: 14px;
}

@media (max-width: 400px) {
    .eil_sip_calc_container {
        padding: 15px;
    }
}