:root{color-scheme:dark;font-family:Inter,ui-sans-serif,system-ui,sans-serif;background:#0b1020;color:#f4f7ff}body{margin:0;min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top,#1e315c,#0b1020 58%)}main{width:min(680px,calc(100% - 48px));padding:48px 0}.eyebrow{color:#8db4ff;letter-spacing:.12em;font-size:.75rem;font-weight:700}h1{font-size:clamp(2.25rem,8vw,4.5rem);letter-spacing:-.06em;margin:.2rem 0 1rem}.intro{color:#c5cde0;font-size:1.1rem;line-height:1.6}.picker{display:block;margin:2rem 0;padding:1.2rem 1.4rem;border:1px dashed #6f9fff;border-radius:14px;background:#101a31;cursor:pointer;font-weight:650}.picker input{display:block;margin-top:.7rem;color:#b8c7e8}section{padding:1.2rem 1.4rem;border-radius:14px;background:#121b30;border:1px solid #273657;min-height:86px}ul{padding-left:1.2rem}.ok{color:#91e2bc}.error{color:#ffb1bd}.note{color:#8997b7;font-size:.88rem;line-height:1.5;margin-top:1.3rem}code{color:#a6c8ff}