@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

* {
    box-sizing: border-box;
}

body {
    background: url('assets/night-sky.jpg');
    background-repeat: no-repeat;
    background-size: cover;
    font-family: 'Roboto', sans-serif;
    margin: 0;
}
.container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
}
h1 {
    color: #fff;
    font-size: 3rem;
    margin-right: 1rem;
}
.search {
    position: relative;
    height: 50px;
}

.search .input {
    background-color: #fff;
    border: 0;
    font-size: 18px;
    padding: 15px;
    height: 50px;
    width: 50px;
    transition: width 0.3s ease;
}

.btn {
    background-color: #e1e0e0e9;
    border: 0;
    cursor: pointer;
    font-size: 24px;
    position: absolute;
    top: 0;
    left: 0;
    height: 50px;
    width: 50px;
    transition: transform 0.3s ease;
}

.btn:focus,
.input:focus {
    outline: none;
}

.search.active .input {
    width: 500px;
}

.search.active .btn {
    transform: translateX(499px);
}