body {
    font-family: 'Roboto', sans-serif;
    background-color: #F8F9FA;
}

.hero-section {
    background: linear-gradient(135deg, #0D47A1 0%, #1976D2 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-section h1 {
    font-weight: 700;
    font-size: 3.5rem;
}

.hero-section p {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 1rem auto;
}

.calculator-card {
    background-color: #FFFFFF;
    border-radius: 0.75rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    padding: 2.5rem;
    margin-top: -4rem;
    position: relative;
    z-index: 10;
}

.form-label {
    font-weight: 500;
}

.btn-primary {
    background: linear-gradient(90deg, #FFC107 0%, #FFD54F 100%);
    border: none;
    border-radius: 2rem;
    padding: 0.75rem 2rem;
    font-weight: 700;
    color: #212529;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(255, 193, 7, 0.3);
    color: #212529;
}

#results-card {
    background-color: #E3F2FD;
    border: 1px solid #90CAF9;
    border-radius: 0.75rem;
    padding: 2rem;
    margin-top: 2rem;
    text-align: center;
}

#results-card h3 {
    color: #0D47A1;
    font-weight: 700;
}

.result-item {
    margin: 1rem 0;
}

.result-item .value {
    font-size: 2.5rem;
    font-weight: 700;
    color: #0D47A1;
}

.result-item .label {
    font-size: 1rem;
    color: #555;
}

.footer {
    padding: 2rem 0;
    background-color: #FFFFFF;
    margin-top: 4rem;
    text-align: center;
    font-size: 0.9rem;
    color: #6c757d;
}