:root { color-scheme: light; --paper: #f3f5ee; --ink: #16332d; --green: #1d463d; --mint: #ddf59b; --muted: #536a60; --line: #d6ded5; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: ui-sans-serif, system-ui, sans-serif; }
.shell { width: min(1100px, calc(100% - 48px)); margin-inline: auto; }
header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; min-height: 96px; border-bottom: 1px solid var(--line); }
.wordmark { display: inline-flex; gap: .65rem; align-items: center; font-weight: 800; font-size: 1.3rem; color: inherit; text-decoration: none; letter-spacing: -.05em; }
.mark { width: 31px; height: 31px; border-radius: 10px; background: var(--green); position: relative; transform: rotate(-12deg); }
.mark::before, .mark::after { content: ""; position: absolute; left: 8px; top: 11px; width: 15px; height: 3px; border-radius: 3px; background: var(--mint); }
.mark::after { left: 13px; top: 17px; width: 10px; }
button { font: inherit; color: var(--ink); border: 1px solid var(--line); border-radius: 10px; padding: .65rem .85rem; background: transparent; cursor: pointer; }
:focus-visible { outline: 3px solid #477c67; outline-offset: 4px; }
.layout { display: grid; grid-template-columns: 1.35fr 1fr; gap: clamp(2rem, 7vw, 5.5rem); align-items: center; padding-block: clamp(3rem, 9vw, 8rem); }
.platform { font-weight: 650; }
h1 { font-size: clamp(2.8rem, 6vw, 5.6rem); line-height: .98; letter-spacing: -.065em; margin: .9rem 0 1.4rem; max-width: 12ch; }
.summary { font-size: 1.19rem; line-height: 1.6; color: var(--muted); max-width: 34ch; }
.status { display: inline-block; border-radius: 99px; padding: .6rem .9rem; font-size: .9rem; font-weight: 700; background: #e2ebdd; }
.demo { display: grid; grid-template-columns: 1fr auto; gap: .7rem; padding: clamp(1.25rem, 4vw, 2.4rem); background: var(--green); color: white; border-radius: 27px; }
.demo-tag, .next-label, output, input, .hint { grid-column: 1 / -1; }
.demo-tag { font-weight: 700; color: var(--mint); margin: 0 0 1.3rem; }
.next-label, .hint { color: #e2ebe1; margin: 0; }
output { display: block; font-size: clamp(3rem, 7.4vw, 5.5rem); line-height: 1; font-weight: 750; letter-spacing: -.07em; margin-bottom: 1rem; }
output, strong { font-variant-numeric: tabular-nums; }
input { width: 100%; height: 32px; margin: 0; accent-color: var(--mint); }
input:focus-visible { outline-color: var(--mint); }
.hint { font-size: .88rem; }
footer { padding-block: 1.5rem; border-top: 1px solid var(--line); color: var(--muted); }
@media (max-width: 760px) {
  header { min-height: 76px; }
  .layout { grid-template-columns: 1fr; }
}