* {
  margin: 0;
  padding: 0;
}

* {
  box-sizing: border-box;
}

html {    
    color: hsla(0, 0%, 100%, 1);
    font-family: "Inter var", sans-serif;
    font-size: 16px;
    background-color: hsla(222, 10%, 19%, 1);
}

.blue {
    color: hsla(215, 79%, 51%, 1);
}

.pink {
    color: hsla(331, 100%, 56%, 1);
}

.green {
    color: hsla(129, 60%, 53%, 1);
}


/* Nav Bar */

header {
    position: fixed;
    top: 0;
    z-index: 2;
    width: 100%;
    background-color: hsla(222, 10%, 19%, 1);
    border-bottom: 0.1rem solid hsla(218, 11%, 15%, 1);
}

#logo div {
    display: inline-block;  
}

#logo img {
    height: 1.25rem;
    width: auto;
    padding-left: 1.25rem;
    padding-right: 0;
}

#logo-title {
    color: hsla(0, 0%, 100%, 1);
    font-size: 1rem;
    padding-left: 0.25rem;
}

#nav-bar {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.nav-button {
  float: left;
}

.nav-button a {
  display: block;
  text-align: center;
  padding: 1rem 1rem;
  text-decoration: none;
  color: hsla(225, 7%, 78%, 1);
}

.nav-button a:hover {
    cursor: pointer;
    color: hsla(210, 2%, 78%, 1);
    background-color: hsla(218, 11%, 15%, 1);
    text-decoration: none;
}

.nav-button a:active {
    color: hsla(210, 2%, 78%, 1);
    border: 1px solid hsla(0, 0%, 100%, 1);
}
    



/* Main Content */

main {
    text-align: center;
    position: relative;
    top: 7.2rem;
    margin-bottom: 9rem;
}

h1 {
    margin-bottom: 4rem;
    font-size: 2.5rem;
}

article {
    padding: 4rem;
    text-align: center;
    background-color: hsla(218, 11%, 15%, 1);
    border-radius: 0.75rem;
    padding: 2rem;
    width: 45rem;
    margin-left: auto;
    margin-right: auto;
    margin-top: 1rem;
    margin-bottom: 3rem;
    line-height: 1.5rem;
}

.article-title {
    margin-top: 1.5rem;
    margin-bottom: 3rem;
    font-size: 1.75rem;
}

#prior-work p,
#what p {
    margin: 0 1.5rem 1.5rem 1.5rem;
    text-align: left;
    font-size: 1.25rem;
    line-height: 1.75rem;
    letter-spacing: 0.05rem;
    color: hsla(225, 7%, 78%, 1);
}


ol {
    font-size: 0.9rem;
    margin: 3.125rem 3.75rem 0 3.75rem;
    text-align: left;
    letter-spacing: 0.02rem;
    color: hsla(225, 7%, 78%, 1);
}

ol li {
    margin: 2rem 0;
}

a {
    color: hsla(215, 79%, 51%, 1);
    text-decoration: none;
} 

a:hover {
    cursor: pointer;
    color: hsla(215, 79%, 41%, 1);
    text-decoration: underline;
}

a:active {
    color: hsla(215, 79%, 51%, 1);
    text-decoration: none;
}

.blank {
    height: 2.5rem;
}
    

/* Footer */
footer {
    position: relative;
    left: 0;
    bottom: 0;
    width: 100%;
    font-size: 1rem;
    letter-spacing: 0.05rem;
    line-height: 2rem;
    margin-left: 1rem;
    border-top: 0.1rem solid hsla(218, 11%, 15%, 1);
    padding: 1rem 0;
}

#footer-first-line {
    width: 100%;
    display: inline-flex;
    justify-content: space-between;
}

#logo-footer div {
    display: inline-block;  
    font-size: 1.5rem;
}

#logo-footer img {
    height: 1.75rem;
    width: auto;
    padding-left: 0;
    padding-right: 0;
    
}

.disclaimer {
    font-size: 0.75rem;
    margin-right: 2rem;
}


/* Screen size differences */

#logo-page-hero div {
    display: inline-block;
}


#logo-page-hero img {
    height: 2rem;
    width: auto;
}

#logo-page-hero h1 {
    padding-bottom: 2rem;
    margin-bottom: 2rem;
}


.small-screen {
    display: none;
}


@media only screen and (max-width: 845px) {
    .small-screen {
        display: block;
        position: fixed;
        top: 0;
        z-index: 2;
        width: 100%;
        text-align: center;
        margin-top: 8rem;
    }
    
    .small-screen h2 {
        margin-bottom: 2rem;
    }
    
    header {
        display: none;
    }
    
    main {
        display: none;
    }
    
    footer {
        display: none;
    }
}