body {
    font-family: "Ubuntu Mono", sans-serif;
}

.container {
    max-width: 1400px;
}

h1 {
    color: #ffffff;
    font-weight: bold;
    line-height: 1.2;
}

h2 {
    line-height: 1.4;
    color: #ffffff;
    font-weight: bold;
    margin-bottom: 0;
}

h3 {
    color: #000000;
    font-weight: normal;
}

.header {
    margin: 3rem auto 1.25rem;
}

#logo {
    width: 330px;
    max-width: 100%;
}

body.main-page .presentation {
    background-color: #A8282B;
}

body.main-page .presentation .content {
    padding: 1.5rem 0;
    background-image: url("../img/ruby-on-rails.svg");
    background-position: center bottom;
    background-repeat: no-repeat;
    background-size: contain;
}

body.main-page .reference {
    padding: 1.5rem 0 2rem;
    background-color: #E6E6E6;
}

body.main-page .reference img {
    width: 100%;
    box-shadow: 10px 10px 30px rgba(0, 0, 0, 0.85);
}

body.main-page .reference h3 a {
    color: #00B7EA;
    display: inline-block;
    line-height: 0.85;
    font-weight: bold;
    cursor: pointer;
}

body.main-page .reference h3 span.description {
    display: block;
}

body.main-page .contact {
    background-color: #E6E6E6;
}

body.main-page .contact .box {
    padding: 1rem 0 0.4rem;
    background-color: #000000;
}

body.main-page .contact p {
    color: #ffffff;
    line-height: 1.2;
    margin-bottom: 0;
}

body.main-page .contact p span {
    display: inline-block;
}

body.main-page .contact a {
    color: #ffffff;
    line-height: 1.2;
    font-weight: bold;
}

body.main-page .contact .separator {
    display: inline-block;
    padding: 0 1rem;
    color: #ffffff;
    line-height: 1.2;
    font-weight: bold;
}

.footer {
    color: #ffffff;
    font-weight: bold;
    background-color: #A8282B;
}

.footer p {
    margin-bottom: 0;
}

.footer .separator {
    padding: 0 0.5rem;
}

.footer a {
    color: #ffffff;
    font-weight: bold;
}

.footer p,
.footer a {
    text-align: center;
}

a:hover, a:focus {
    text-decoration: none;
}

h1 {
    font-size: 32px;
}
h2 {
    font-size: 18px;
}
h3 {
    font-size: 24px;
}
body.main-page .reference h3 a {
    font-size: 34px;
}
body.main-page .reference h3 span {
    font-size: 18px;
}
body.main-page .contact p {
    font-size: 18px;
}
body.main-page .contact a,
body.main-page .contact .separator {
    font-size: 26px;
}
.footer {
    font-size: 24px;
}

.img-responsive {
    max-width: 100%;
}

@media (min-width: 576px) {
    h1 {
        font-size: 40px;
    }
    h2 {
        font-size: 26px;
    }
    h3 {
        font-size: 28px;
    }
    #logo {
        width: 500px;
    }
    body.main-page .reference h3 a {
        font-size: 40px;
    }
    body.main-page .reference h3 span {
        font-size: 22px;
    }
    body.main-page .contact p {
        font-size: 22px;
    }
    body.main-page .contact a,
    body.main-page .contact .separator {
        font-size: 26px;
    }
    body.main-page .contact a {
        display: block;
    }
    body.main-page .contact .separator {
        display: none;
    }
    .footer {
        font-size: 28px;
    }
}

@media (min-width: 768px) {
    h2 {
        margin-bottom: .5rem;
    }
    body.main-page .presentation .content {
        padding: 4rem 0;
    }
    body.main-page .reference {
        padding: 2.5rem 0 2rem;
    }
    body.main-page .reference img {
        width: 700px;
        max-width: 60%;
    }
    body.main-page .reference h3 {
        padding: 0 0.5rem 0 1.5rem;
    }
    body.main-page .reference h3 a {
        display: block;
        line-height: 1.41;
    }
    body.main-page .reference h3 span {
        display: block;
    }
    body.main-page .contact .box {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        margin-left: auto;
        margin-right: auto;
        width: 400px;
        padding: 5px 0 10px;
        background-color: rgba(0,0,0, 0.7);
        z-index: 20;
    }
    body.main-page .contact p{
        margin-bottom: 1rem;
    }
    .footer .separator {
        padding: 0 2rem;
    }
    .footer p,
    .footer a {
        width: 300px;
    }
}

@media (min-width: 1200px) {
    h1 {
        font-size: 48px;
    }
    h2 {
        font-size: 34px;
    }
    h3 {
        font-size: 34px;
    }
    .header {
        margin: 5.5rem auto 3rem;
    }
    #logo {
        width: 600px;
    }
    body.main-page .reference h3 {
        text-align: right;
        padding: 0 1.75rem;
    }
    body.main-page .reference h3 a {
        font-size: 46px;
    }
    body.main-page .reference h3 span {
        font-size: 26px;
    }
    body.main-page .presentation .content {
        background-size: 100% 120%;
    }
    body.main-page .contact p {
        font-size: 26px;
    }
    body.main-page .contact a,
    body.main-page .contact .separator {
        font-size: 48px;
    }
    .footer {
        font-size: 32px;
    }
}

@media (max-width: 380px) {
    .footer {
        font-size: 18px;
        padding: 0.5rem 0;
    }
    body.main-page .contact .separator {
        display: none;
    }
}