:root{
    font-size: 100%;
}

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

body{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

main{
    width: 100%;
    max-width: 600px;
    padding: 1rem;
}

h1{
    text-align: center;
    margin-bottom: 1rem;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 0.5rem;
    border-radius: 15px;
}

.input-group{
    position: relative;
    margin-bottom: 1rem;
    border-radius: 15px;
    border: solid 3px #fff;   
    overflow: hidden; 
}

.input-group label{
    display: block;
    width: 100%;
    height: 100%;
    padding: 0.5rem 1rem;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    border: none;
}

.input-group input{
    position: absolute;
    top: 0;
    left: 0;
    visibility: hidden;
}

.range-group{
    display: flex;
    flex-direction: column;
    margin-bottom: 2rem;
}

.range-group label{
    font-size: 1.2rem;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 0.5rem;
    border-radius: 15px;
    margin-bottom: 1rem;
}

.range-group input{
    cursor: pointer;
}

.button-group{
    display: flex;
    justify-content: space-around;
}

button{
    padding: 0.5rem 2rem;
    background-color: #fff;
    border-radius: 10px;
    border: none;
    font-size: 1.2rem;
    min-width: 150px;
    transition: background-color 400ms;
    position: relative;
}

button:hover{
    background-color: #eee;
    cursor: pointer;
}

.btn-copy::before{
    display: block;
    width: 100%;
    background-color: #333;
    color: #fff;
    border-radius: 5px;
    content: "✅ copié !";
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
}

.btn-copy.active::before{
    animation: slide-out 1000ms linear both;
}

@keyframes slide-out {
    0%{
        opacity: 1;
    }
    30%{
        opacity: 1;
        transform: translateY(0);
    }
    100%{
        opacity: 0;
        transform: translateY(-150%);
    }
}