body {
    font-family: 'Inter', sans-serif;
    background-color: #0a0a0a; /* Deep, dark background */
    color: #e0e0e0; /* Light gray text for contrast */
}
.section-heading {
    position: relative;
    padding-bottom: 0.75rem;
    display: inline-block;
}
.section-heading::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 80px; /* Stronger underline */
    height: 5px; /* Thicker underline */
    background-color: #059669; /* Deep emerald green for Thistle */
    border-radius: 9999px; /* Rounded corners for underline */
}
.btn-primary {
    background-color: #059669; /* Deep emerald green */
    transition: background-color 0.3s ease, transform 0.3s ease;
}
.btn-primary:hover {
    background-color: #047857; /* Darker green on hover */
    transform: scale(1.05);
}
.bg-gradient-steel {
    background-image: linear-gradient(to right, #1f2937, #0a0a0a); /* Darker gradient */
}
.text-green-strong {
    color: #059669; /* Strong green */
}
.text-gray-steel {
    color: #cbd5e1; /* Light gray for steel accent */
}
/* Loading spinner styles */
.spinner {
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid #059669;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}