/* ProofPad — the site wears the app's tokens (docs/proofpad-style.md). */
:root{--steel:#28292B;--plate:#333437;--seam:#4B4C50;--chalk:#F2F0EA;--ash:#C7C3B9;--smoke:#97938B;--birch:#C89B6A}
*{box-sizing:border-box;margin:0;padding:0}
html{background:var(--steel);color:var(--chalk);font:17px/1.5 -apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
body{min-height:100vh;display:flex;flex-direction:column}
main{width:100%;max-width:640px;margin:0 auto;padding:72px 24px 48px;flex:1}
.wordmark{font-size:44px;font-weight:600;letter-spacing:.02em;line-height:1;color:var(--chalk);text-decoration:none;display:inline-block}
.lede{font-size:28px;font-weight:600;line-height:1.2;margin-top:40px}
.sub{color:var(--ash);margin-top:14px;font-size:17px}
.quiet{color:var(--smoke);margin-top:28px;font-size:15px}
h1{font-size:28px;font-weight:600;line-height:1.2;margin-top:40px}
h2{font-size:22px;font-weight:600;margin-top:36px;padding-top:20px;border-top:1px solid var(--seam)}
p,li{color:var(--ash);margin-top:12px}
ul{padding-left:22px}
strong{color:var(--chalk);font-weight:600}
a{color:var(--chalk)}
.mono{font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:13px;color:var(--ash)}
footer{width:100%;max-width:640px;margin:0 auto;padding:24px;border-top:1px solid var(--seam);display:flex;gap:20px;flex-wrap:wrap;align-items:baseline}
footer a{color:var(--ash);text-decoration:none;font-size:15px}
footer a:hover{color:var(--chalk)}
footer .motto{color:var(--smoke);font-size:13px;margin-left:auto}
.actions{margin-top:36px;display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:0 22px;height:52px;line-height:52px;border-radius:6px;background:var(--chalk);color:var(--steel);font-weight:500;text-decoration:none}
.btn.secondary{background:transparent;color:var(--chalk);border:1px solid var(--seam)}