:root {
    --bg:         linear-gradient(180deg,#cfd2ff 0%,#9b9dff 40%,#7ba8ff 100%);
    --card:       rgba(255,255,255,0.18);
    --text:       #2b1f3a;
    --muted:      #0b299d;
    --accent:     #ff3cf3;
    --radius:     0.5em;
    --main-width: 40em;
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 1em;
    color: #313131;
    font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, "Helvetica Neue",  Arial, sans-serif;
}

header {
    background-color: aliceblue;
    border: 1px solid lightgray;
    border-bottom-color: transparent;
    border-radius: 1em 1em 0 0;
    padding: 2em;
    width: var(--main-width);
    text-align: center;
}

main {
    background-color: aliceblue;
    border: 1px solid lightgray;
    border-top-color: transparent;
    border-radius: 0 0 1em 1em;
    justify-content: center;
    padding: 2em;
    width: var(--main-width);
    text-align: center;
}

.card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 14px;
    margin-bottom: 16px;
    backdrop-filter: blur(8px);
}

.card h2 {
    font-size: 13px;
    color: var(--muted);
    margin: 0 0 6px;
}