main{
 display: flex;
 justify-content: center;
 align-items: center;
}

.login-card {
 position: relative;
 width:400px;
 max-width: 90vw;
 box-shadow: rgba(0, 0, 0, 0.15) 2px 2px 3px;
 background: var(--blanc-lo);
 border-radius: var(--radius);
 padding: 20px;
 border: 1px solid var(--gris)
}

.login-card h1 {
 display: block;
 text-align: center;
 margin-bottom: 1.5rem;
}

.login-card button {
 width: 100%;
}