Merge pull request #17 from foucblg/CSS-solving

src/app/app.component.html

src/app/views/header/header.component.css

src/app/views/header/header.component.html

.../views/quiz/quiz-card/answer-box/answer-box.component.css

.../views/quiz/quiz-card/choice-box/choice-box.component.css

src/app/views/quiz/quiz-endpage/quiz-endpage.component.css

src/app/views/quiz/quiz-endpage/quiz-endpage.component.html

src/app/views/quiz/quiz-endpage/quiz-endpage.component.ts

src/app/views/quiz/quiz-homepage/quiz-homepage.component.css

...app/views/quiz/quiz-homepage/quiz-homepage.component.html

src/app/views/quiz/quiz-time/quiz-time.component.css