html, body {
    margin: 0;
    padding: 0;
}

:root {
    --search-border: #bbb;
    --search-focus-border: #3a71ca;
}

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    padding: 1rem;
}

.search-bar {
    width: 33%;
    transition: width 0.3s;
    border: 0.15em solid var(--search-border);
    padding: 0.5em 0.15em;
    border-radius: 0.3rem;
}

.search-bar:focus {
    width: 100%;
    border: 0.2em solid var(--search-focus-border);
}

.search-bar:focus::placeholder {
    color: transparent;
}

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0,0,0,0);
	white-space: nowrap;
	border: 0;
}