.metal-calculator-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.08);
}

.calculator-header {
    margin-bottom: 30px;
}

.calculator-logo {
    max-height: 60px;
    margin-bottom: 15px;
}

.calculator-title {
    font-weight: 700;
    margin-bottom: 5px;
}

.calculator-subtitle {
    font-size: 14px;
    color: #6c757d;
}

.dimension-title {
    margin: 25px 0 15px;
    font-weight: 600;
}

.button-group {
    display: flex;
    gap: 12px;
    margin-top: 25px;
}

.btn-calc {
    flex: 1;
    background-color: #fed700;
    border-radius: 12px;
    padding: 12px;
    border: none;
    font-weight: 600;
}

.btn-reset {
    flex: 1;
    background: #f1f3f5;
    color: #333;
    border-radius: 12px;
    padding: 12px;
    border: none;
}

.result-box {
    margin-top: 18px;
}

.result-box input {
    font-weight: 600;
    background: #f8f9fa;
}