312 -strong-
https://developer.mozilla.org/pt-BR/docs/Web/HTML/Element/strong

312 Qualificar-links-externos-para-o-Google
https://developers.google.com/search/docs/advanced/appearance/qualify-outbound-links?hl=pt-br

313 Elementos-HTML
https://developer.mozilla.org/pt-BR/docs/Web/HTML/Element

314 Se-es-e-estrutura-de-um-documento-HTML5
https://developer.mozilla.org/pt-BR/docs/Sections_and_Outlines_of_an_HTML5_document

316 Box-model
https://developer.mozilla.org/pt-BR/docs/Web/CSS/box_model

319 HTML-Input-Types
https://www.w3schools.com/html/html_form_input_types.asp

319 Como-estruturar-um-formul-rio-HTML
https://developer.mozilla.org/pt-BR/docs/Web/Guide/HTML/Forms/How_to_structure_an_HTML_form

324 Exemplo
https://codepen.io/luizomf/pen/KKNwMeG

328 Pseudo-classes
https://developer.mozilla.org/pt-BR/docs/Web/CSS/Pseudo-classes

329 -not-
https://developer.mozilla.org/pt-BR/docs/Web/CSS/:not

330 -nth-child-
https://developer.mozilla.org/pt-BR/docs/Web/CSS/:nth-child

331 Pseudo-elementos
https://developer.mozilla.org/pt-BR/docs/Web/CSS/Pseudo-elementos

332 Especificidade
https://developer.mozilla.org/pt-BR/docs/Web/CSS/Specificity

332 Selectors-Level-3
https://www.w3.org/TR/selectors-3/#specificity

332 Specificity-Calculator
https://specificity.keegan.st/

333 CSS-Inheritance-An-Introduction
https://www.sitepoint.com/css-inheritance-introduction/

333 Cascade-and-inheritance
https://developer.mozilla.org/pt-BR/docs/Aprender/CSS/Construindo_blocos/Cascade_and_inheritance

333 CSS-inherit-Keyword
https://www.w3schools.com/cssref/css_inherit.asp

337 CSS-Units
https://www.w3schools.com/cssref/css_units.asp

338 CSS-Text
https://www.w3schools.com/css/css_text.asp

340 Usando-Media-Queries
https://developer.mozilla.org/pt-BR/docs/Web/Guide/CSS/CSS_Media_queries

340 CSS-media-Rule
https://www.w3schools.com/cssref/css3_pr_mediaquery.asp

340 Media-Queries-Breakpoints-For-Responsive-Design-In-2021
https://devfacts.com/media-queries-breakpoints-2021/

344 Flexbox
https://developer.mozilla.org/pt-BR/docs/Learn/CSS/CSS_layout/Flexbox#um_aparte_no_modelo_flex

346 A-Complete-Guide-to-Flexbox
https://css-tricks.com/snippets/css/a-guide-to-flexbox/

351 grid
https://developer.mozilla.org/pt-BR/docs/Web/CSS/grid

351 CSS-Grid-Layout-Module
https://www.w3schools.com/css/css_grid.asp

351 A-Complete-Guide-to-Grid
https://css-tricks.com/snippets/css/complete-guide-grid/