.material-calculator-block {
    background: #ffffff;
    border-radius: 16px;
    padding: 30px;
    max-width: 650px;
    margin: 40px auto;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    border: 1px solid #e6e6e6;
}

.material-calculator-block h2 {
    font-size: 1.7rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.material-calculator-block p {
    color: #555;
    font-size: 1rem;
}

.material-calculator-block form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.material-calculator-block label {
    font-weight: 600;
    color: #444;
}

.material-calculator-block input,
.material-calculator-block select {
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid #ccc;
    background: #fafafa;
    font-size: 1rem;
    transition: 0.2s ease;
}

.material-calculator-block input:focus,
.material-calculator-block select:focus {
    border-color: #007bff;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(0,123,255,0.2);
    outline: none;
}

.material-calculator-block button {
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
}

.material-calculator-block button:hover {
    background-color: #005dc4;
}

.material-calculator-block button:active {
    transform: scale(0.98);
}

.calc-result {
    margin-top: 25px;
    background: #f6f9ff;
    border: 1px solid #d9e4ff;
    padding: 20px;
    border-radius: 12px;
}

.calc-result h3 {
    margin-bottom: 12px;
    color: #333;
}

.calc-result ul {
    list-style: none;
    padding: 0;
}

.calc-result li {
    padding: 6px 0;
    border-bottom: 1px solid #eee;
}

.calc-result li:last-child {
    border-bottom: none;
}