* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: none;
    outline: none;
}

::selection {
	background: rebeccapurple;
	color: white;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #fafafa;
}

.header {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    padding: 10px;
    align-items: center;
    background: transparent;
    animation: navbar 1s linear both;
    animation-timeline: scroll(root block);
    animation-range: 0 160px;
}

@keyframes navbar {
    to {
        backdrop-filter: blur(32px) contrast(120%) saturate(110%);
        box-shadow: 0 0 10px rgba(0, 0, 0, .4);
    }
}

h1 {
    position: relative;
}

h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    background: linear-gradient(320deg, mediumpurple, purple);
    width: 40%;
    height: 3px;
    border-radius: 20px;
}