:root { color-scheme: dark; }
* { box-sizing: border-box; margin: 0; }
html, body { height: 100%; }
body {
  background: #0D0F12; color: #E8EBF0;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  display: flex; align-items: center; justify-content: center;
  padding: 16px; text-align: center;
}
main { max-width: 32rem; }
.mark { width: 104px; height: 56px; margin: 0 auto 28px; display: block; }
h1 { font-size: clamp(2rem, 8vw, 3rem); font-weight: 500; letter-spacing: 0.08em; }
h1 .ai { color: #7CC4FF; }
h1 .dot { color: #5C6470; }
p { margin-top: 16px; color: #8A929E; font-size: 1rem; line-height: 1.5; }