Introdução a HTML e CSS - Caelum (portuguese)
Especificidade de seletores CSS - Caelum (portuguese)
Guia de Unidades CSS - Alura (portuguese)
Propriedade CSS background - Maujor (portuguese)
Aplicando filtros CSS - Maujor (portuguese)
box-model e box-shadow - YouTube (portuguese)
box-sizing - YouTube (portuguese)
Guia Flexbox - Alura (portuguese)
Guia Flexbox - Origamid (portuguese)
CSS Animations tips and tricks - MDN
Clipping and Masking in CSS - CSS-Tricks
Harmonia das cores (portuguese)
Cores com harmonia (portuguese)
Novos elementos semânticos no HTML5 (portuguese)
O impacto das cores - Medium (portuguese)
Cores e Acessibilidade - Chief of Design (portuguese)
HTML Color Codes - Color names
Itmeo - Gradient colors collection
Materialize - Material Design icons
Material Design's icon design principles
Burst - Imagens grátis (portuguese)
Life of Pix - Free high-resolution photos
Magdeleine - Hand-picked free photos
Pexels - Free stock photos and Videos
Unsplash - Free high-resolution photos
Turing completude (portuguese)
Generative art by Tainá Simões
Rainbow gradient background animation
Metatags - Google (portuguese)
HTML: Linguagem de Marcação de Hipertexto
CSS: Folhas de Estilo em Cascata
Gráficos na Web (canvas, SVG, WebGL, WebRTC)
HTTP: Protocolo de Transferência de Hipertexto
HTML: Hypertext Markup Language
Graphics on the Web (canvas, SVG, WebGL, WebRTC)
HTTP: Hypertext Transfer Protocol
Step by step guide to becoming a modern frontend developer, suggested by Kamran Ahmed
This roadmap cover everything that is there to learn. Don't feel overwhelmed, you don't need to learn it all in the beginning if you are just getting started.
This link compilation first was created to self use and then restructured to help beginner developers. I hope this be useful to you. Feel free to contribute and please star my repository if you liked it.