/* Green Theme Variables */
:root {
    --primary-green: #2e7d32;
    --dark-green: #1b5e20;
    --light-green: #e8f5e9;
    --lime-green: #8bc34a;
    --mint-green: #d4edda;
}

.green-theme {
    background-color: #f8fff8;
}

/* Card Styling */
.card {
    border-radius: 12px;
    border: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(46, 125, 50, 0.15);
}

.card-header {
    background-color: var(--primary-green) !important;
    color: white;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* Buttons */
.calculate-button {
    background-color: var(--primary-green);
    border: none;
    padding: 12px;
    font-weight: 500;
    transition: all 0.3s;
}

.calculate-button:hover {
    background-color: var(--dark-green);
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.3);
}

/* Results Display */
.display-6 {
    font-weight: 700;
    color: #343a40;
}

.bg-light-green {
    background-color: var(--light-green);
}

.border-success {
    border: 1px solid var(--primary-green) !important;
}

.alert-light-green {
    background-color: var(--light-green);
    border-color: var(--primary-green);
}

/* Loading Spinner */
.spinner-border {
    color: var(--primary-green);
    width: 3rem;
    height: 3rem;
    margin: 1rem auto;
    display: block;
}

/* Color Coding */
.text-success { color: var(--primary-green) !important; }
.text-primary { color: var(--lime-green) !important; }
.text-warning { color: #ffc107 !important; }
.text-danger { color: #dc3545 !important; }

/* Responsive Adjustments */
@media (max-width: 768px) {
    .display-6 {
        font-size: 1.5rem;
    }
    .card-body .display-4 {
        font-size: 2rem;
    }
}