html { color-scheme: dark; background: #111722; color: #edf2f8; }
body { margin: 0; font: 16px/1.65 system-ui, sans-serif; }
main { max-width: 760px; margin: auto; padding: 28px 20px 48px; }
article { margin: 25px 0; padding: clamp(18px, 5vw, 38px); border: 1px solid #364458; border-radius: 15px; background: #181f2c; }
h1 { font-size: clamp(24px, 5vw, 36px); line-height: 1.15; margin-top: 0; }
h2 { font-size: 19px; margin-top: 1.5em; }
a { color: #9cf0d8; }
label { display: block; }
button { margin-top: 18px; padding: 12px 20px; border: 0; border-radius: 8px; background: #f5d74d; color: #171a22; font: inherit; font-weight: 700; cursor: pointer; }