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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: url('../image_du_site/state_of_decay_2_anime.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    margin: 0em;
    align-items: center;
}

@media only screen and (max-width: 350px) {
    .container-first {
        top: 25em;
    }
}

@media only screen and (min-width: 350px) and (max-width: 600px) {
    .container-first {
        top: 18em;
    }
}

@media only screen and (min-width: 600px) and (max-width: 768px) {
    .container-first {
        top: 20em;
    }
}

@media only screen and (min-width: 768px) and (max-width: 992px) {
    .container-first {
        top: 20em;
    }
}

@media only screen and (min-width: 992px) and (max-width: 1200px) {
    .container-first {
        top: 16em;
    }
}

@media only screen and (min-width: 1200px) and (max-width: 1616px) {
    .container-first {
        top: 16em;
    }
}

@media only screen and (min-width: 1616px) {
    .container-first {
        top: 40em;
    }
}

h1 {
    text-transform: uppercase;
    color: red;
    font-family: "Abril fatface", sans-serif;
}

.btn_ph {
    margin-top: 30%;
    align-items: center;
    text-align: center;
}

.text-align_c {
    text-align: center;
}

.taille-cijv {
    width: 5em;
    border: 0.5em solid #1317d6;
}

.btn-first {
    background: none;
    width: 15em;
    height: 5em;
    border: 0.5em solid #01D758;
    font-size: 1em;
    font-weight: bold;
    color: #01D758;
    transition: .4s linear;
    position: relative;
    cursor: pointer;
}

.btn-first:hover {
    color: white;
}

.lignes {
    position: absolute;
    top: 6%;
    left: 5%;
}

.l1 {
    width: 20em;
    height: 0.3em;
    background: #f1f1f1;
    border-radius: 1em;
}

.l2 {
    width: 10em;
    height: 0.3em;
    background: #f1f1f1;
    border-radius: 1em;
    position: relative;
    top: 2em;
}

@media only screen and (max-width: 350px) {
    .l1 {
        width: 10em;
    }

    .l2 {
        width: 5em;
    }
}

.medias {
    position: absolute;
}

@media only screen and (max-width: 350px) {
    .medias {
        right: 0%;
        bottom: 35%;
    }
}

@media only screen and (min-width: 350px) and (max-width: 600px) {
    .medias {
        right: 0%;
        bottom: 35%;
    }
}

@media only screen and (min-width: 600px) and (max-width: 768px) {
    .medias {
        right: 0%;
        bottom: 35%;
    }
}

@media only screen and (min-width: 768px) and (max-width: 992px) {
    .medias {
        right: 0%;
        bottom: 30%;
    }
}

@media only screen and (min-width: 992px) and (max-width: 1200px) {
    .medias {
        right: 0%;
        bottom: 30%;
    }
}

@media only screen and (min-width: 1200px) {
    .medias {
        right: 0%;
        bottom: 30%;
    }
}

.logo-medias {
    width: 3em;
    height: 3em;
}

.pulse-anim {
    width: 4.2em;
    height: 4.2em;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: white;
    margin: 3em auto 0;
    box-shadow: 0 0 0 0 #000;
    animation: pulse 2s infinite;
    transform: translateY(-40%);
}

@keyframes pulse {
    to {
        box-shadow: 0 0 0 1em rgba(0, 0, 0, 0.01);
    }
}

.floating-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2em;
    border-radius: 20%;
}

.floating-btn .tooltip {
    position: absolute;
    background: #fff;
    padding: 0.7em;
    font-size: 1em;
    border-radius: 20%;
    line-height: 1.4;
    text-align: left;
    width: 5em;
    transform: translate(-7.5em, -78%);
    box-shadow: 0 0.5em 1em rgba(0, 0, 0, 0.2);
    pointer-events: none;
    display: none;
}

.floating-btn:hover .tooltip {
    display: block;
}

a {
    font-size: 1em;
}

/* loader */

.loader {
    width: 100%;
    height: 100%;
    background-color: #000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.lettre-base {
    color: #484848;
    font-size: 0.5em;
    animation: flash 3s linear infinite;
}

.lettre-base-espace {
    color: #484848;
    font-size: 0.5em;
    letter-spacing: 0.75em;
    animation: flash 3s linear infinite;
}

@media only screen and (max-width: 350px) {

    .lettre-base,
    .lettre-base-espace {
        font-size: 0.25em;
    }
}

@media only screen and (min-width: 350px) and (max-width: 600px) {

    .lettre-base,
    .lettre-base-espace {
        font-size: 0.25em;
    }
}

@media only screen and (min-width: 600px) and (max-width: 768px) {

    .lettre-base,
    .lettre-base-espace {
        font-size: 0.5em;
    }
}

@media only screen and (min-width: 768px) and (max-width: 992px) {

    .lettre-base,
    .lettre-base-espace {
        font-size: 0.5em;
    }
}

.lettre {
    color: #484848;
    font-size: 3em;
    letter-spacing: 0.5em;
    margin-bottom: 3em;
    animation: flash 1.2s linear infinite;
}

@media only screen and (max-width: 350px) {
    .lettre {
        font-size: 1em;
    }
}

@media only screen and (min-width: 350px) and (max-width: 600px) {
    .lettre {
        font-size: 1.5em;
    }
}

@media only screen and (min-width: 600px) and (max-width: 768px) {
    .lettre {
        font-size: 2em;
    }
}

@media only screen and (min-width: 768px) and (max-width: 992px) {
    .lettre {
        font-size: 2em;
    }
}

p {
    color: red;
    text-align: center;
}

@keyframes flash {
    0% {
        color: #fff900;
        text-shadow: 0 0 0.2em #fff900;
    }

    90% {
        color: #484848;
        text-shadow: none;
    }

    100% {
        color: #fff900;
        text-shadow: 0 0 0.2em #fff900;
    }
}

.lettre:nth-child(1) {
    animation-delay: 0.1s;
}

.lettre:nth-child(2) {
    animation-delay: 0.2s;
}

.lettre:nth-child(3) {
    animation-delay: 0.3s;
}

.lettre:nth-child(4) {
    animation-delay: 0.4s;
}

.lettre:nth-child(5) {
    animation-delay: 0.5s;
}

.lettre:nth-child(6) {
    animation-delay: 0.6s;
}

.lettre:nth-child(7) {
    animation-delay: 0.7s;
}

.lettre:nth-child(8) {
    animation-delay: 0.8s;
}

.lettre:nth-child(9) {
    animation-delay: 0.9s;
}

.lettre:nth-child(10) {
    animation-delay: 1s;
}

.lettre:nth-child(11) {
    animation-delay: 1.1s;
}

.lettre:nth-child(12) {
    animation-delay: 1.2s;
}

.lettre:nth-child(13) {
    animation-delay: 1.3s;
}

/* lettre-base */

.lettre-base:nth-child(1) {
    animation-delay: 0.1s;
}

.lettre-base:nth-child(2) {
    animation-delay: 0.2s;
}

.lettre-base:nth-child(3) {
    animation-delay: 0.3s;
}

.lettre-base:nth-child(4) {
    animation-delay: 0.4s;
}

.lettre-base:nth-child(5) {
    animation-delay: 0.5s;
}

.lettre-base:nth-child(6) {
    animation-delay: 0.6s;
}

.lettre-base:nth-child(7) {
    animation-delay: 0.7s;
}

.lettre-base:nth-child(8) {
    animation-delay: 0.8s;
}

.lettre-base:nth-child(9) {
    animation-delay: 0.9s;
}

.fondu-out {
    opacity: 0;
    transition: opacity 0.4s ease-out;
}

.button-base {
    border: 0;
    background: transparent;
    color: white;
    position: relative;
    overflow: hidden;
    padding: 20px 50px;
    border-radius: 0.5em;
    cursor: pointer;
    font-size: 1.5em;
    box-shadow: 0em -0em 0em 0em rgba(143, 64, 248, .5), 0em 0em 0em 0em rgba(39, 200, 255, .5);
    transition: all .10s;
}

@media only screen and (max-width: 350px) {
    .button-base {
        font-size: 1em;
        margin-top: 30em;
    }
}

.button-base::after {
    content: "";
    width: 25em;
    height: 15em;
    background: linear-gradient(225deg, #00ff62 0%, #4b59da 50%, #ff3c00 100%);
    z-index: -1;
    position: absolute;
    left: -5em;
    top: -7em;
    transition: all .1s;
}

.button-base:hover::after {
    transform: rotate(200deg);
}

.button-base:hover {
    transform: translate(0, -0.5em);
    box-shadow: 1em -1em 1.5em 0 rgba(143, 64, 248, .25), -1em 1em 1.5em 0em rgba(39, 200, 255, .25);
}