*{
	margin: 0;
	padding: 0;
	border: 0;
	box-sizing: border-box;
    list-style: none;
}

:root { 
    --color-transparent: #00000000;
    --color-black:#000000;
    --color-light_black:#1D1D1F; /*fonts*/
    --color-grey: #333333;
    --color-light_grey: #888888; /*hover*/
    --color-white: #FFFFFF;
}

body {
    margin: 0;
    background-color: var(--color-white);
    color: var(--color-light_black);
    font-family: "Montserrat", "Source Sans Pro", sans-serif;
    font-size: 16px;
    line-height: 1.4;
    letter-spacing: 0.2px;  
    font-style: normal;  
    font-weight: 400;
    text-decoration: none;
} 

.topbar {
    font-family: "Montserrat", "Source Sans Pro", sans-serif;
    font-size: 16px;
    background: var(--color-light_black);
    color: var(--color-light_black);
    text-decoration: none;
}

.topbar a {
    text-decoration: none;
    color: var(--color-white);
}

.topbar_logo {
    display: flex;
    justify-content: space-between;
    margin-left: 12.5px;
}

.topbar .topbar_logo a, 
.topbar .topbar_logo li {
    font-size: 24px;
    font-weight: bold; 
    width: auto;
    height: 60px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.topbar .topbar_nav a,
.topbar .topbar_nav li {
    width: auto;
    height: 60px; 
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: space-around;
}

.topbar_nav {
    position: absolute;
    left: 0;
    right: 0;
    top: -190px;
    margin: 10px;
    border-radius: 20px;
    background-color: var(--color-white);
    transition: 2s;
}

.topbar_nav a {
    color: var(--color-light_black);
}

.topbar a:hover { 
    color: var(--color-light_grey);
    transition: 0.25s;
}
.menu-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 60px;
    height: 60px;
    cursor: pointer;
    transition: all .5s ease-in-out;
    /* border: 3px solid #fff; */
}
.menu-btn_bar {
    width: 35px;
    height: 4px;
    background: var(--color-white);
    border-radius: 5px;
    box-shadow: 0 2px 5px var(--color-light-grey);
    transition: all .5s ease-in-out;
}
.menu-btn_bar::before,
.menu-btn_bar::after {
    content: '';
    position: absolute;
    width: 35px;
    height: 4px;
    background: var(--color-white);
    border-radius: 5px;
    box-shadow: 0 2px 5px var(--color-light-grey);
    transition: all .5s ease-in-out;
}
.menu-btn_bar::before {
    transform: translateY(-11px);
  }
.menu-btn_bar::after {
    transform: translateY(11px);
}

#check {
    display: none;
}

#check:checked ~ .topbar_nav {
    display: block;
    top: 60px;
}

@media only screen and (min-width: 870px) {
    .topbar_container {
        display: flex;
        justify-content: space-between;
        max-width: 1200px;
        height: 60px;
        margin-left: auto;
        margin-right: auto;
    }
    #check:checked ~ .topbar_nav {
        display: flex;
        transition: none;
    }
    .topbar_nav li {
        margin: 0 40px;
    }
    .topbar_nav .site-web {
        margin-left: 80px;
    }
    .topbar_nav .contact { 
        margin-right: 12.5px;
    }
    .topbar_nav {
        display: flex;
        align-content: center;
        justify-content: center;
        align-items: center;
        flex-direction: row;
        justify-content: flex-end;
        position: relative;
        top: 0;
        right: 0;
        background-color: inherit;
        transition: none;
    }

    .topbar_nav a {
        color: var(--color-white);
    }
    .checkbtn {
        display: none;
    }
}



.bg {
    background-image: url("Img/first-bg.jpg");
    background-repeat: no-repeat;
    background-position-x: right;
    background-position-y: center;
    background-size: cover; 
    background-attachment: fixed;
    margin-top: 0;
    width: auto;
    height: 400px;
    transition: 3.5s;
    display: flex;
    flex-direction: column;
    align-content: center;
    justify-content: center;
    align-items: center;
}

.slogan {
    color: var(--color-white);
    font-size: 26px;
    text-align: center;
    max-width: 900px;
}

.vous-souhaitez_container {
    text-align: center;
    background: var(--color-white);
    color: var(--color-light_black);
    font-size: 20px;
    font-weight: 500;
    padding: 40px;
}

/****************************************************************************************************************************************/

.box_sw_container {
    display: flex;
    align-content: center;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

.box_sw {
    color: var(--color-transparent);
    width: 240px;
    height: 140px;
    border-radius: 20px;
    perspective: 1000px;
}

.box-inner_sw {
    position: relative;
    width: inherit;
    height: inherit;
    border-radius: inherit;
    text-align: center;
    transition: transform 0.5s;
    transform-style: preserve-3d;
}

.box_sw:hover .box-inner_sw {
    transform: rotateY(180deg);
}

.box-front_sw, 
.box-back_sw {
    border-radius: inherit;
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-content: center;
    justify-content: center;
    align-items: center;
    backface-visibility: hidden;
}

.box-front_sw {
    background-image: url('Img/bg-box-front.jpg');
    background-size: cover;
    color: var(--color-white);
    font-weight: 700;
}

.box-back_sw {
    background-color: var(--color-grey);
    color: var(--color-white);
    font-size: 16px;
    font-weight: 600;
    line-height: 24px;
    transform: rotateY(180deg);
}

@media only screen and (min-width: 375px) {
    .box_sw {
        width: 295px;
        height: 175px;
    }
}

@media only screen and (min-width: 425px) {
    .box_sw {
        width: 345px;
        height: 205px;
    }
}
/****************************************************************************************************************************************/

.pourquoi-nous_container {
    text-align: center;
    background: var(--color-white);
    color: var(--color-light_black);
    font-size: 20px;
    font-weight: 500;
    padding: 40px;
}