:root{
  --bg:#f6f8fb; --card:#fff; --text:#0f172a; --muted:#64748b; --line:#e5e7eb;
  --shadow:0 10px 30px rgba(2,6,23,.08); --shadow2:0 6px 18px rgba(2,6,23,.06);
  --primary:#2563eb; --primary2:#1d4ed8;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: radial-gradient(1200px 700px at 10% 0%, #eaf1ff 0%, rgba(234,241,255,0) 55%),
              radial-gradient(900px 600px at 90% 10%, #f2eaff 0%, rgba(242,234,255,0) 55%),
              var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial;
}
.topbar{
  position:sticky; top:0; z-index:20;
  display:flex; align-items:center; gap:14px;
  padding:14px 18px;
  backdrop-filter: blur(10px);
  background: rgba(246,248,251,.7);
  border-bottom:1px solid var(--line);
}
.brand{font-weight:800; letter-spacing:.2px}
.spacer{flex:1}
.nav a{
  color:var(--muted); text-decoration:none; font-weight:700;
  padding:8px 10px; border-radius:10px;
}
.nav a:hover{background:rgba(37,99,235,.08); color:var(--text)}
.container{max-width:980px; margin:22px auto; padding:0 16px}
.card{
  background:var(--card); border:1px solid var(--line);
  border-radius:18px; box-shadow:var(--shadow);
  padding:18px;
}
h1{font-size:22px; margin:0 0 14px}
h2{font-size:18px; margin:18px 0 10px}
p{margin:8px 0; color:var(--muted)}
.form{display:grid; gap:12px; max-width:520px}
label{display:grid; gap:6px; color:var(--muted); font-weight:700; font-size:.95rem}
input{
  padding:11px 12px; border-radius:12px;
  border:1px solid var(--line); background:#fff; color:var(--text); outline:none;
}
input:focus{border-color:rgba(37,99,235,.55); box-shadow:0 0 0 4px rgba(37,99,235,.12)}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:11px 14px; border-radius:12px;
  border:1px solid rgba(37,99,235,.25);
  background:linear-gradient(180deg,var(--primary) 0%,var(--primary2) 100%);
  color:#fff; text-decoration:none; font-weight:800; cursor:pointer;
}
.btn.secondary{background:#fff; color:var(--text); border:1px solid var(--line)}
.btn.secondary:hover{background:#f8fafc}
.messages{display:grid; gap:10px; margin:0 0 12px}
.msg{padding:10px 12px; border-radius:14px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow2)}
.msg.error{border-color:rgba(180,35,24,.25)}
.msg.info{border-color:rgba(37,99,235,.25)}
.msg.ok{border-color:rgba(22,163,74,.25)}
.pill{display:inline-flex; align-items:center; gap:8px; padding:7px 10px; border-radius:999px; border:1px solid var(--line); background:#fff; font-weight:800}
.pill.ok{border-color:rgba(22,163,74,.25)} .pill.bad{border-color:rgba(180,35,24,.25)}
.splitter{display:grid; grid-template-columns:1fr 1fr; gap:12px}
@media (max-width:880px){.splitter{grid-template-columns:1fr}}
.splititem{border:1px solid var(--line); border-radius:16px; padding:14px; background:#fff; box-shadow:var(--shadow2)}
.splitname{font-weight:900; margin-bottom:8px}
code{display:block; font-family:var(--mono); font-size:.86rem; padding:10px; border-radius:12px; background:#f8fafc; border:1px solid var(--line); overflow:auto}
.muted{color:var(--muted)}
a.link{color:var(--primary); text-decoration:none; font-weight:800}
a.link:hover{text-decoration:underline}
pre.log{font-family:var(--mono); padding:12px; border-radius:14px; border:1px solid var(--line); background:#0b1220; color:#e6edf7; overflow:auto}