* {
    box-sizing: border-box;
}

body {
    background-color: #0d1137;
    font-family: sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    margin: 0;
}

.search-container {
    position: relative;
    height: 50px;
}

.search-container .input {
    background-color: #fff;
    border: 0;
    font-size: 16px;
    padding: 15px;
    height: 50px;
    width: 50px;
    transition: width 0.3s ease;
}

.btn {
    background-color: #fff;
    color: #0d1137;
    border: 0;
    cursor: pointer;
    font-size: 24px;
    position: absolute;
    top: 0;
    left: 0;
    height: 50px;
    width: 50px;
    transition: transform 0.4s ease;
}

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

.search-container.active .input {
    width: 250px;
}

.search-container.active .btn {
    transform: translateX(200px);
}