:root{
  --ink:#f5f5f4; --dim:#a1a1aa; --faint:#71717a;
  --bg:#0a0a0b; --line:rgba(255,255,255,.09); --accent:#f97316;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg); color:var(--ink);
  font:400 17px/1.65 ui-sans-serif,system-ui,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:44rem;margin:0 auto;padding:0 1.5rem}
header{padding:2.5rem 0 0}
.mark{display:flex;align-items:center;gap:.6rem}
.mark svg{width:30px;height:30px;display:block}
.mark b{font-weight:800;letter-spacing:-.01em;font-size:1.05rem}
.mark a{border:0;color:inherit;display:flex;align-items:center;gap:.6rem}

h1{font-size:clamp(2rem,5vw,2.6rem);line-height:1.1;letter-spacing:-.03em;
   font-weight:800;margin:4rem 0 .4rem}
.small{color:var(--faint);font-size:.85rem}
h2{font-size:1.05rem;font-weight:700;margin:2.6rem 0 .6rem}
p,li{color:var(--dim);margin-bottom:.8rem}
ul{padding-left:1.2rem;margin-bottom:.8rem}
a{color:var(--ink);text-decoration:none;border-bottom:1px solid rgba(255,255,255,.25)}
a:hover{border-bottom-color:var(--accent)}
footer{border-top:1px solid var(--line);margin-top:4rem;padding:2rem 0 4rem;
       color:var(--faint);font-size:.85rem;display:flex;justify-content:space-between;
       gap:1rem;flex-wrap:wrap}

label{display:block;color:var(--ink);font-size:.9rem;font-weight:600;margin:1.4rem 0 .4rem}
input,textarea{
  width:100%;background:#111114;color:var(--ink);border:1px solid var(--line);
  border-radius:.6rem;padding:.7rem .8rem;font:inherit;font-size:1rem;
}
input:focus,textarea:focus{outline:none;border-color:var(--accent)}
textarea{min-height:9rem;resize:vertical}
button{
  margin-top:1.6rem;background:var(--accent);color:#0a0a0b;border:0;border-radius:.6rem;
  padding:.75rem 1.4rem;font:inherit;font-weight:700;cursor:pointer;
}
button:hover{filter:brightness(1.08)}
.hp{position:absolute;left:-9999px}
.note{border:1px solid var(--line);border-radius:.6rem;padding:1rem 1.1rem;margin-top:1.5rem}
.ok{border-color:rgba(249,115,22,.5)}
.err{border-color:rgba(248,113,113,.5)}