✨ Feature: Persist Navbar Underline for Active Section

[archangel2006]

Description

Navbar links currently show an underline on hover, but:

• the underline disappears after clicking a link
• there is no indication of the active section while scrolling

This makes navigation less intuitive.

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Goal

Ensure the navbar link for the current section:

• remains underlined after being clicked
• stays highlighted while the section is in view

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Implementation

• Use an .active class for navbar links
• Reuse existing hover styles for the active state

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Acceptance Criteria

• Clicking a navbar link keeps it underlined
• Active section link updates correctly while scrolling
• No flickering or multiple active links
• No changes to existing color scheme

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Relevant Files

• style.css (active underline styling)
• script.js (click/scroll logic)

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⚠️ Notes

• Keep implementation clean and reusable
• Avoid hardcoding styles or inline fixes

[Vnshk-sharma]

@archangel2006 please assign this to me.