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

body {
    background: #333 url('ressources/SoftwareEngineer.jpg') no-repeat center center fixed;
    background-size: cover;
    font-family: 'Arial', 'Helvetica', sans-serif;
    height: 100vh;
    position: relative;
    overflow-x: hidden;
}

.container-first {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

h1 {
    text-transform: uppercase;
    font-size: 4vw;
    color: #f1f1f1;
    font-family: 'Abril Fatface', sans-serif;
    animation: colorChange 2s infinite alternate;
}

@keyframes colorChange {
    0%, 100% {
        color: #f1f1f1;
    }
    50% {
        color: #ff9900;
    }
}

.container-btns {
    margin-top: 20px;
}

.btn-first {
    border: 2px solid #f1f1f1;
    outline: none;
    background: transparent;
    font-size: 2vw;
    padding: 1.5vw 2vw;
    color: #f1f1f1;
    cursor: pointer;
    text-decoration: none;
}

.btn-first:not(:last-child) {
    margin-right: 2vw;
}

.btn-first:hover {
    transition: all 0.3s ease-in-out;
    background: #f1f1f1;
    color: #333;
}

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

.l1 {
    width: 15vw;
    height: 1px;
    background: #f1f1f1;
    border-radius: 5px;
}

.l2 {
    width: 8vw;
    height: 1px;
    background: #f1f1f1;
    border-radius: 5px;
    position: relative;
    top: 1vh;
}

.logo {
    position: absolute;
    right: 3vw;
    top: 4vh;
    width: 10vw;
    height: auto;
    cursor: pointer;
    filter: opacity(70%) grayscale(100%);
    transition: filter 0.3s ease-in-out;
}

.logo:hover {
    filter: opacity(100%) grayscale(0%);
}

.medias {
    list-style-type: none;
    position: absolute;
    right: 3vw;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.bulle {
    width: 6vw;
    height: 6vw;
    border-radius: 50%;
    border: 1px solid #f1f1f1;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 1vw 0;
    background: #f1f1f1;
    cursor: pointer;
    position: relative;
    transition: transform 0.3s ease-in-out;
}

.bulle:hover {
    transform: scale(1.5);
}

.logo-medias {
    width: 4vw;
    height: auto;
}