body {
    margin: 0;
    background: linear-gradient(45deg, #a52a2a, rgb(44, 149, 179));
    height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}
.bloc-connexion {
    position: relative;
}
form {
    background: rgba(255,255,255,.2);
    padding: 3rem;
    height: 320px;
    border-radius: 20px;
    border-left: 1px solid rgba(255,255,255, .3);
    border-top: 1px solid rgba(255,255,255, .3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    -moz-backdrop-filter: blur(10px);
    box-shadow: 20px 20px 40px -6px rgba(0,0,0, .2);
    text-align: center;
}
form h1 {
    color: white;
    font-weight: 500;
    opacity: .7;
    font-size: 2rem;
    margin-bottom:  40px;
    text-shadow: 2px 2px 4px rgba(0,0,0, .2);
}
button {
    background: transparent;
    border: none;
    border-left: 1px solid rgba(255,255,255, .3);
    border-top: 1px solid rgba(255,255,255, .3);
    padding: 1rem;
    border-radius: 50px;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    -moz-backdrop-filter: blur(5px);
    box-shadow: 4px 4px 60px rgba(0,0,0, .2);
    color: white;
    font-weight: 500;
    text-shadow: 2px 2px 4px rgba(0,0,0, .2);
    transition: all .3s;
    margin-bottom: 2em;
    width: 150px;
    margin-top: 10px;
}
button:hover {
    text-shadow: 2px 2px 6px #00000040;
}
button:active {
    text-shadow: none;
}
form input{
    background: transparent;
    border: none;
    border-left: 1px solid rgba(255,255,255, .3);
    border-top: 1px solid rgba(255,255,255, .3);
    padding: 1rem;
    width: 200px;
    border-radius: 50px;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    -moz-backdrop-filter: blur(5px);
    box-shadow: 4px 4px 60px rgba(0,0,0, .2);
    color: white;
    font-weight: 500;
    text-shadow: 2px 2px 4px rgba(0,0,0, .2);
    transition: all .3s;
    margin-bottom: 2em;
}
input:hover,
input[type="identifiant"]:focus,
input[type="password"]:focus {
    background: rgba(255,255,255,0.1);
    box-shadow: 4px 4px 60px 8px rgba(0, 0,0,0.2);
}
::placeholder {
    color: #fff;
}

.back-button {
    position: absolute;
    top: 20px;
    left: 20px;
    background-color: rgb(89, 255, 0);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 16px;
    background: rgba(255,255,255,.2);
    border-radius: 50px;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    -moz-backdrop-filter: blur(5px);
}

.back-button:hover {
    background-color: #448d9b;
}
.drop {
    background: rgba(255,255,255, .3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 10px;
    border-left: 1px solid rgba(255,255,255, .3);
    border-top: 1px solid rgba(255,255,255, .3);
    box-shadow: 10px 10px 60px -8px;
    position: absolute;
    transition: all 0.2s ease;
}
.drop-1 {
    height: 50px; width: 50px;
    top: -30px; left: 270px;
}
.drop-2 {
    height: 80px; width: 80px;
    top: -30px; left: -30px;
}
.drop-3 {
    height: 120px; width: 100px;
    top: 120px; left: -50px;
    z-index: -1;
}
.drop-4 {
    height: 100px; width: 60px;
    top: -20px; left: 300px;
    z-index: -1;
}
.drop-5 {
    height: 80px; width: 80px;
    top: 360px; left: 280px;
    z-index: -1;
}