CSS challenges

Practice problem statements with input format, output format, constraints and solutions.

beginner

CSS Introduction challenge

Build a small solution that uses CSS Introduction in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core css introduction pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

beginner

Syntax challenge

Build a small solution that uses Syntax in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core syntax pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

beginner

Selectors challenge

Build a small solution that uses Selectors in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core selectors pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

beginner

Colors challenge

Build a small solution that uses Colors in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core colors pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

beginner

Backgrounds challenge

Build a small solution that uses Backgrounds in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core backgrounds pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

beginner

Borders challenge

Build a small solution that uses Borders in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core borders pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

beginner

Margins challenge

Build a small solution that uses Margins in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core margins pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

beginner

Padding challenge

Build a small solution that uses Padding in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core padding pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

beginner

Box Model challenge

Build a small solution that uses Box Model in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core box model pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

beginner

Text challenge

Build a small solution that uses Text in CSS and handles one normal case plus one edge case.

Input format

Use a short text value, array, query, or sample object depending on the topic.

Output format

Print, render, or return the processed result in a readable format.

Constraints

Keep the solution under 60 lines.
Use descriptive names.
Do not depend on hidden external services.

Starter code

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}

Test cases

basic sample - valid processed result
empty or small sample - safe fallback result

Hint

Focus on the core text pattern before polishing the final output.

Solution

.lesson-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #ffffff;
}