.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.calculator-section {
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 8px;
    transition: transform 0.2s;
}

.calculator-section:hover {
    transform: translateY(-2px);
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.input-group input:focus {
    border-color: #007bff;
    outline: none;
}

.result {
    margin-top: 1rem;
    padding: 1rem;
    background: #e9ecef;
    border-radius: 6px;
    font-weight: 500;
}

.error {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.5rem;
    display: none;
}

.calculator-title {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 1rem;
    text-align: center;
}

.calculator-description {
    text-align: center;
    color: #666;
    margin-bottom: 2rem;
}