app.css

/* General page styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    overscroll-behavior: none;
    scroll-behavior: smooth;
    font-family: 'Open Sans', sans-serif;
    font-weight: 100;
    background: center/cover url(https://images.unsplash.com/photo-1546471364-2735697e52d2?w=800&auto=format&fit=crop&q=60&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxzZWFyY2h8NTJ8fGtvcmVhbiUyMGZvb2R8ZW58MHx8MHx8fDA%3D);
}

a {
    text-decoration: underline;
    color: inherit;
}

/* General class styles */
.head-font {
    font-family: 'Lobster Two', sans-serif;
}

.light {
    font-weight: lighter;
    margin-bottom: 10px;
}

.centered {
    text-align: center;
}


.container {
    height: 60%;
    width: 85%;
    margin: 0 auto;
    padding: 60px 30px 20px 30px;
    container: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: rgba(2, 36, 2, 0.7);
    color: white;
}

.white-text {
    color: white;
    font-size: 1.05rem;
    font-weight: 400;
    border-radius: 10px;
}

/* General elements style */
h2:not(#dishes h2) {
    margin-bottom: 7px;
    text-decoration: underline;
}

header a:not(a.light), footer > a:last-of-type {
    text-decoration: none;
}

section {
    max-width: 90vw;
    padding: 10px;
    margin-top: 20px;
}

/* Navigation bar */
#navbar {
    width: 100%;
    height: 7%;
    background: linear-gradient( 45deg, rgba(255, 228, 196, 0.9), rgba(242, 234, 234,0.9));
    border-radius: 0 0 10px 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
    position: fixed;
    top: 0;
    font-size: 1.2rem;
}

#navbar h1 {
    font-size: 1.7rem;
    margin-left: 1%;
}

#navbar a {
    margin-right: 20px;
}

#navbar a:hover, #navbar a:active {
    color: rgba(231, 115, 37);
}

#navbar div ul, #navbar div li {
    list-style: none;
}

#navbar div ul {
    flex: 1;
    width: 700px;
    display: flex;
    justify-content: space-evenly;
    height: 100%;
    margin: 0 50px;
    padding: 0;
}

#navbar div li {
    display: block;
    text-align: center;
    width: 500px;
    padding: 25px 0;
 } 

 #navbar div li:hover {
    background-color: rgba(231, 115, 37, 0.5);
}

/* 1s section: Intro */
#intro {
    width: 66%;
    text-align: justify;
    margin: 35px auto 15px;
    font-size: 1.16rem;
}

/* 2nd section: Dishes */
img {
    width: 100%;
    min-height: 350px;
    border-radius: 5px;
}

#side > img {
    max-height: 300px important!;
}

#dishes {
    display: flex;
    justify-content: space-evenly;
    color: black;
    width: 95%;
    margin: 10px auto 0;
}

#dishes article {
    width: calc(98% / 3);
    text-align: justify;
    background: linear-gradient(bisque, rgb(242, 234, 234));
    border-radius: 10px;
    padding: 10px;
    transition: 300ms ease-in-out;
}

#dishes article:hover {
    border-top: 0.70rem solid rgba(231, 115, 37, 0.5);
    border-bottom: 0.70rem solid rgba(231, 115, 37, 0.5);
    border-radius: 5px;
    transform: scale(1.07);
}


span a {
    font-style: italic;
    font-weight: bold;
}

span a:hover {
    color: rgba(231, 115, 37);
}

span a:focus {
    color: rgb(106, 17, 76);
}

/* 3rd section: Learn more */
#more {
    width: 60%;
    border: 2px solid white;
    border-radius: 10px;
    margin: 40px auto;
    padding: 30px;
    line-height: 40px;
    background-color: rgba(231, 115, 37, 0.4);
    text-shadow: 2px 0 0 black;
}

#more div:not(:nth-of-type(3)) {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#email {
    display: block;
    border-radius: 5px;
    width: 53%;
    height: 28px;
}

#frequency {
    display: block;
    font-family: inherit;
    border-radius: 5px;
    width: 330px;
    height: 25px;
}

label[for="frequency"] {
    margin-top: 10px;
}

#agree_tos {
    font-family: inherit;
    margin: 30px 0;
}

label[for="agree_tos"] {
    font-style: italic;
}

#subscribe {
    height: 45px;
    width: 150px;
    padding: 5px;
    font-family: inherit;
    border-radius: 7px;
    border: 5px double rgba(243, 246, 243, 0.7);
    text-transform: uppercase;
    font-size: 0.85rem;
    color: white;
    background: linear-gradient(rgb(2, 36, 2), rgb(10, 83, 49) , rgb(2, 36, 2));
    transition: 150ms ease-in-out;
}

#subscribe:hover {
    transform: scale(1.1);
    background: linear-gradient(rgb(3, 58, 3), rgb(14, 112, 66) ,rgb(4, 70, 4));
}

#subscribe:focus {
    transform: scale(1.1);
    background: linear-gradient(rgb(24, 3, 58), rgb(59, 45, 131) ,rgb(24, 3, 58));
}

/* footer  */

footer {
    background: linear-gradient(bisque, rgb(242, 234, 234), bisque);
    padding: 20px;
    height: 120px;
    margin: 0 auto;
    border-radius: 10px 10px 0 0;
    display: flex;
    flex-direction: column;
}

footer p {
    font-size: 0.8rem;
}

footer div p :hover {
    color: rgba(231, 115, 37);
}

footer div p :focus {
color: rgb(106, 17, 76);
}

.back-top-button {
    position: relative;
    left: 70%;
    top: 20%;
    font-weight: 700;
    font-size: 1.2rem;
    columns: rgb(2, 36, 2);
    border: 2px solid rgb(2, 36, 2);
    border-radius: 15px;
    height: 50px;
    width: 110px;
    padding: 8px 10px;
    transition: 100ms ease-in;
    box-shadow: 1px 1px 2px rgb(2, 36, 2);
}

.back-top-button:hover {
    background-color: rgb(2, 36, 2);
    color: white;
    border: 1px double white;
    transform: scale(0.95);
}

/* Responsive styling */
@media only screen and (max-width: 48em) {
    /* General class sytling */
    .container {
        width: 100%;
        padding: 85px 15px 20px 15px;

    }

    /* General element styling */
    section {
        max-width: 100%;
        margin-top: 5px;
    }

    /* Navigation bar */
    #navbar {
        flex-wrap: wrap;
        padding: 10px 10px;
        width: 100%;
        height: 12vh;
        font-size: 1rem;
        justify-content: flex-start;
        align-items: baseline;
        overflow: hidden;
    }

    #navbar h1 {
        width: 220px;
        margin: 0 0 10px 10px;
    }

    #navbar div ul {
        width: 280px;
        height: 50px;
        display: flex;
        justify-content: space-evenly;
        align-items: flex-start;
        margin: 0;
        padding: 0;
    }

    #navbar div li {
        text-align: center;
        width: 91px;
        height: 50px;
        padding: 0;
     } 

     /* 1st section: Intro */
    #intro {
        width: 95%;
        margin-top: 15px;
        padding-bottom: 0;
        font-size: 0.955rem; 
    }

    /* 2nd section: Dishes */
    #dishes {
        display: flex;
        flex-direction: column;
        color: black;
    }

    #dishes article {
        width: 100%;
        text-align: justify;
        font-size: 0.88rem;
        margin: 8px 0;
    }

    #dishes article:hover {
        transform: scale(1.03);
    }

    /* 3rd section: Learn more */

    #more {
        width: 90%;
    }

    #email {
        width: 53%;
    }

    #agree_tos {
        margin-bottom: 5px;
    }

    #subscribe {
        margin-top: 15px;
    }

}

@media (min-width: 48em) and (max-width: 80em) {

    /* Class styling */
    .container {
        flex-wrap: wrap;
        flex-grow: 0.1;
        padding: 50px;
    }

    /* Navigation bar */
    #navbar {
        flex-wrap: wrap;
        padding: 10px 10px;
        width: 100%;
        height: 7vh;
        font-size: 1.15rem;
        justify-content: space-between;
        align-items: baseline;
    }
            
    #navbar h1 {
        width: 220px;
        margin: 0 0 10px 10px;
    }
    
     #navbar div ul {
        width: 400px;
        height: 50px;
        display: flex;
        justify-content: space-evenly;
        align-items: flex-start;
        margin: 0;
        padding: 0;
        }
    
        #navbar div li {
            text-align: center;
            width: 150px;
            height: 50px;
            padding: 0;
         }

    /* 1st section: Intro */
    #intro {
        width: 91%;
        margin-top: 45px;
        padding-bottom: 0;
        font-size: 1.2rem; 
    }

    /* 2nd section: Dishes */
    #dishes {
        flex-wrap: wrap;
    }

    #dishes article {
        width: 100%;
        height: 100%;
        transform: 0.01;
        margin: 20px;
    }

    /* 3rd section: Learn more */
    #more {
        width: 88%;
    }
    
    #email {
         width: 53%;
    }
    
    #agree_tos {
        margin-bottom: 5px;
    }
    
    #subscribe {
        margin-top: 15px;
    }

}

/* Img en local plusieurs taille puis avec classe determiné par media quiery */