HTML & CSS ⚡ Recently updatedUpdated on Jun 30, 2026 — this content may still be evolving.

HTML & CSS: Mini Tasks

Hands-on practice. Do these without Bootstrap or Tailwind. Use plain HTML + CSS.

Task 1: Responsive Navbar (30 min)

Requirements:

• Logo on the left, nav links on the right
• Hamburger menu on mobile (< 768px)
• Sticky at top on scroll
• Active link highlighted

Skills tested: Flexbox, media queries, positioning

Bonus: Make hamburger toggle with pure CSS (checkbox hack) or minimal JS

Task 2: Card Grid (20 min)

Requirements:

• 3 columns on desktop, 2 on tablet, 1 on mobile
• Each card: image, title, description, button
• Equal height cards
• 20px gap between cards

Skills tested: CSS Grid, responsive design

/* Starter hint */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

Task 3: Centered Login Form (15 min)

Requirements:

• Form centered horizontally and vertically on page
• Inputs: email, password, submit button
• Proper <label> for each input
• Focus styles on inputs
• Max-width 400px

Skills tested: Flexbox centering, form semantics, accessibility

Task 4: CSS-Only Tooltip (20 min)

Requirements:

• Hover over a button → tooltip appears above it
• No JavaScript
• Use ::after or ::before

Skills tested: Pseudo-elements, positioning

Task 5: Dark Mode Toggle (25 min)

Requirements:

• Toggle button switches between light and dark theme
• Use CSS custom properties
• Preference persists (localStorage + JS is fine for toggle)
• Respect prefers-color-scheme as default

Skills tested: CSS variables, media queries

:root {
  --bg: #ffffff;
  --text: #1a1a1a;
}
[data-theme="dark"] {
  --bg: #1a1a1a;
  --text: #ffffff;
}

Task 6: Accessible Modal (30 min)

Requirements:

• Overlay + centered modal box
• Close button + click outside to close
• Trap focus inside modal when open
• aria-modal="true", role="dialog"

Skills tested: Positioning, z-index, accessibility, basic JS

Task 7: Holy Grail Layout (20 min)

Requirements:

• Header (full width, fixed height)
• Sidebar (left, 250px)
• Main content (fills remaining space)
• Footer (full width, bottom)

Skills tested: Grid or Flexbox layout

/* Grid approach */
.layout {
  display: grid;
  grid-template-areas:
    "header header"
    "sidebar main"
    "footer footer";
  grid-template-columns: 250px 1fr;
  min-height: 100vh;
}

Task 8: Animated Loading Skeleton (15 min)

Requirements:

• Gray placeholder blocks mimicking text lines
• Shimmer animation left to right
• Use @keyframes and background: linear-gradient

Skills tested: Animations, pseudo-elements

Self-Evaluation

After each task, check:

• Works on mobile (375px width)
• No horizontal scroll
• Keyboard navigable
• Clean class names (BEM or logical naming)
• No !important needed

Share your solutions — compare with a friend or push to GitHub for your portfolio.