.internal-link {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: all 0.2s ease;
}

.internal-link:hover {
    text-decoration-thickness: 2px;
}

/* Content type specific colors */
.ingredient-link {
    color: #2563eb;
}

.ingredient-link:hover {
    color: #1d4ed8;
}

.system-link {
    color: #7c3aed;
}

.system-link:hover {
    color: #6d28d9;
}

.category-link {
    color: #059669;
}

.category-link:hover {
    color: #047857;
}

.research-link {
    color: #ea580c;
}

.research-link:hover {
    color: #c2410c;
}

.content-link {
    color: #4b5563;
}

.content-link:hover {
    color: #374151;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .internal-link {
        text-decoration-thickness: 2px;
        font-weight: 500;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .internal-link {
        transition: none;
    }
}