style.css

:root {
    --font-family-open-sans: "Open Sans", sans-serif;
    --font-family-raleway: "Raleway", sans-serif;
    --dark-blue-1: hsl(217, 28%, 15%);
    --dark-blue-2: hsl(218, 28%, 13%);
    --dark-blue-3: hsl(216, 53%, 9%);
    --dark-blue-4: hsl(219, 30%, 18%);
    --cyan: hsl(176, 68%, 64%);
    --cyan-opaque: hsla(176, 68%, 64%, 0.7);
    --blue: hsl(198, 60%, 50%);
    --blue-opaque: hsla(198, 60%, 50%, 0.5);
    --light-red: hsl(0, 100%, 63%);
    --white: hsl(0, 0%, 100%);
    --black: #000000;
    --grey: #303841;
    --red: #be3144;
    --orange: #ff7f50;
    --yellow: #ffdd40;
    --green: #37af65;
    --purple: #ae63e4;
}

html {
    box-sizing: border-box;
    font-family: var(--font-family-open-sans);
    font-size: 14px;
    color: var(--white);
}


* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

}
*,
*:before,
*:after {
    box-sizing: inherit;
}

body {
    max-width: 1440px;
    margin: auto;
    height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-family-raleway);
    font-weight: 700;
}

h1 {
    font-size: 2.5em;
}
h2 {
    font-size: 2em;
}
h3 {
    font-size: 1.17em;
}

ul {
    list-style: none;
}

a {
    display: inline-block;
    text-decoration: none;
    color: inherit;
}
.button {
    display: inline-block;
    background-image: linear-gradient(to right, var(--cyan), var(--blue));
    border-radius: 30px;
}

.button:hover {
    background-image: linear-gradient(to bottom, var(--cyan), var(--cyan));
}

header {
    background: var(--dark-blue-1);
    padding: 65px 70px;
    display: grid;
    grid-template-columns: 1fr;
    grid-auto-flow: column;
    align-items: center;
}

header ul {
    display: grid;
    grid-auto-flow: column;
    justify-items: center;
    grid-column-gap: 50px;
}

header a:hover {
    font-weight: 700;
    text-decoration: underline;
}

#intro {
    background: var(--dark-blue-1);
    background-image: url("images/bg-curvy-desktop.svg");
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center bottom;
}

#intro .content-container {
    max-width: 720px;
    margin: auto;
    text-align: center;
    padding-bottom: 125px;
}

#intro .content-container img {
    width: 100%;
}

#intro.content-container h1 {
    padding: 25px 0;
    line-height: 1.5;
}

#intro .content-container p {
    padding: 0 100px;
    line-height: 1.5;
    font-size: 1.17em;
    font-weight: 400;
}

#intro .button {
    padding: 15px 85px;
    margin: 25px 0;
}

#features {
    background-color: var(--dark-blue-2);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    grid-gap: 65px 130px;
    padding: 0 200px;
}

.features-wrapper {
    display: grid;
    justify-items: center;
    text-align: center;
}

.features-wrapper img {
    display: block;
}

.features-wrapper h3 {
    padding: 10px 0;
}

.features-wrapper p {
    line-height: 1.5;
}

#explanation {
    background-color: var(--dark-blue-2);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(375px, 1fr));
    grid-gap: 50px;
    padding: 75px;
    align-items: center;
}  
#explanation img {
    display: block;
    justify-self: center;
    width: 100%;
    max-width: 612px;
}

#explanation .content-container h1 {
    padding: 10px 0;
}  
#explanation .content-container p {
    line-height: 1.5;
    padding: 10px 0;
}

#explanation .anchor {
    display: inline-block;
    border-bottom: 1px solid var(--cyan);
    padding: 5px 0;
}
#explanation .anchor a {
    color: var(--cyan);
}
#explanation .anchor img {
    display: inline-block;
    padding-left: 5px;
    vertical-align: middle;
    width: auto;
}

#testimonials {
    background-color: var(--dark-blue-2);
    background-image: url("images/bg-quotes.png");
    background-repeat: no-repeat;
    background-position: 115px 40px;
    padding: 75px 125px 335px 125px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    grid-gap: 40px;
}  
.testimonial-container {
    background-color: var(--dark-blue-4);
    box-shadow: 10px 5px var(--dark-blue-1);
    padding: 20px;
    border-radius: var(5px);
}

.testimonial-container p {
    padding: 20px 0;
}


.profile-container {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    align-items: center;
    font-size: 12px;
}

.profile-container .image-wrapper {
    width: 30px;
    height: 30px;
    grid-column: 1;
    grid-row: 1 / span 2;
}

.profile-container .image-wrapper img {
    width: 100%;
    border-radius: 50%;
}

.profile-container .profile-name {
    grid-column: 2;
    grid-row: 1;
    font-weight: 700;
    padding: 0 10px;
}

.profile-container .profile-title {
    grid-column: 2;
    grid-row: 2;
    padding: 0 10px;
}

#email-signup {
    background-color: #fff;
    height: 0;
}

#email-signup .content-container {
    position: relative;
    max-width: 760px;
    top: -125px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--dark-blue-1);
    box-shadow: 5px 5px var(--dark-blue-3);
    border-radius: 10px;
    text-align: center;
    padding: 25px 75px;
}
#email-signup .content-container h2 {
    padding: 10px 0;
}
#email-signup .content-container p {
    line-height: 1.5;
    padding: 10px 0;
}

#email-signup .signup-form {
    display: grid;
    grid-template-columns: 1fr;
    grid-auto-flow: column;
    grid-gap: 25px;
    align-items: center;
    padding: 25px 0;
}
#email-signup .content-container .button {
    padding: 10px 25px;
}

#email-signup .content-container input {
    width: 100%;
    padding: 10px 25px;
    border-radius: 30px;
    border: 0;
}

input[type="email"]:invalid {
    color: red;
}

footer {
    background: var(--dark-blue-3);
    padding: 200px 100px 100px 100px;
}
footer .logo {
    padding-bottom: 50px;
}

.footer-container {
    display: grid;
    justify-content: center;
    grid-template-columns: 1fr;
    grid-auto-flow: column;
    align-items: start;
    grid-gap: 100px;
}

.contact-info-container {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: repeat(2, 1fr);
    grid-auto-flow: column;
    align-items: start;
    grid-column-gap: 50px;
}

.contact-1 {
    grid-column: 1;
    grid-row: 1 / 3;
}

.contact-2 {
    grid-column: 2;
    grid-row: 1;
}

.contact-3 {
    grid-column: 2;
    grid-row: 2;
}

.contact-info-wrapper {
    display: grid;
    grid-template-columns: repeat(2, auto);
    grid-column-gap: 15px;
    justify-content: start;
    align-items: start;
}

.contact-info-wrapper i {
    display: inline-block;
    padding-top: 5px;
}
.contact-info-wrapper p {
    display: inline-block;
    line-height: 1.5;
}

.footer-navbar {
    justify-content: stretch;
}
.footer-navbar ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, auto);
    grid-gap: 15px 55px;
}

.footer-navbar li {
}
.footer-navbar a {
}

.footer-navbar a:hover {
    font-weight: 700;
}

.social-media-container {
    display: inline-block;
    text-align: center;
}

.social-media-container a {
    display: inline-block;
    border-color: inherit;
    border: 1px solid;
    border-radius: 50%;
    padding: 5px;
    margin: 0 5px;
}

.social-media-container a:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}


@media screen and (max-width: 1100px) {
    .contact-info-container {
        grid-auto-flow: row;
        grid-row-gap: 20px;
    }

    .contact-2 {
        grid-column: 1;
        grid-row: 3;
    }

    .contact-3 {
        grid-column: 1;
        grid-row: 4;
    }
}

@media screen and (max-width: 900px) {
    .footer-navbar ul {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    h1 {
        font-size: 2em;
    }


    header {
        padding: 10px;
    }
    header .logo {
        width: 50%;
        height: 50%;
    }
    header .logo img {
        width: 100%;
    }

    header ul {
        grid-column-gap: 20px;
    }

    #intro{
        background-image: url("images/bg-curvy-mobile.svg");
        grid-template-columns: 1fr;
    }
    #intro .content-container p {
        padding: 0 10px;
    }

    #features {
        padding: 0 20px;
    }

    #explanation {
        padding: 75px 20px;
    }


    #testimonials {
        background-position: 15px 40px;
        padding: 75px 25px 335px 25px;
    }

    #email-signup {
        background-color: #fff;
        height: 0;
        padding: 0 20px;
    }

    #email-signup .content-container {
        position: relative;
        top: -125px;
        left: 50%;
        transform: translateX(-50%);
        padding: 25px 50px;
    }
    /* #email-signup .content-container h2 {
        
    } */

    #email-signup .signup-form {
        grid-auto-flow: row;
    }

    footer {
        padding: 300px 20px 100px 20px;
    }

    footer .logo {
        padding-bottom: 50px;
    }
    .footer-container {
        grid-auto-flow: row;
    }

    .contact-info-container {
        grid-auto-flow: row;
        grid-row-gap: 20px;
    }

    .contact-2 {
        grid-column: 1;
        grid-row: 3;
    }

    .contact-3 {
        grid-column: 1;
        grid-row: 4;
    }
    .footer-navbar ul {
        grid-template-columns: 1fr;
    }
}