4.2. Margen y relleno (Introducción a CSS)
html - A div straight after the body causes a large top margin in firefox only - Stack Overflow
CSS margin-top Property - server2client.com
Learn CSS: How to use Margin and Padding in HTML using CSS? - YouTube
CSS Padding — TutorialBrain
How To Adjust the Content, Padding, Border, and Margins of an HTML Element With CSS | DigitalOcean
.png "margin property (Windows) | Microsoft Learn")
margin property (Windows) | Microsoft Learn
padding-top - CSS: Cascading Style Sheets | MDN
HTML margin-left | How to Set Left Margin for Paragraph in HTML?
scroll-margin | CSS-Tricks - CSS-Tricks
Padding vs Margin
No proper margin-top for headlines in ticket descr...
Learn About Margin CSS: Using CSS Margin Auto and Other Properties
Margin Styles : MGA
CSS 教學- margin-top 失效！外間距會直接影響到上一層【飛肯設計學苑】教學範例區
css - HTML body is not at the top of the page even with margin set to 0 - Stack Overflow
Lesson 2.7. Margin and padding | Lulu's blog
CSS Margin | o7planning.org
Centering HTML Elements on Screen | Travis J. Gosselin
margin-top
The Definitive Guide to Using Negative Margins — Smashing Magazine
CSS Margins and Padding - GeeksforGeeks
The Difference Between Margins and Padding in CSS & HTML | Udacity
html - Why does this CSS margin-top style not work? - Stack Overflow
HTML | DOM Style marginTop Property - GeeksforGeeks
How to Adjust Margins with CSS | Webucator
CSSのmarginプロパティでマージン（HTML要素の間隔）を指定する方法
css - Why <ul> adds extra top margin? - Stack Overflow
