:root {
  --fg: #1a1c1e;
  --muted: #5b6168;
  --line: #d4d8dd;
  --brand: #0b4f9c;
  --brand-dark: #08376c;
  --ok: #1c7c3c;
  --err: #b3261e;
  --bg: #f4f6f8;
  --card: #ffffff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
}
main {
  max-width: 680px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}
.head h1 { font-size: 1.5rem; margin: 0 0 4px; }
.sub { color: var(--muted); margin: 0 0 8px; }
form {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
fieldset {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px 4px;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
legend { font-weight: 600; color: var(--brand-dark); padding: 0 6px; }
label { display: flex; flex-direction: column; gap: 4px; font-weight: 600; }
.row { display: flex; gap: 14px; flex-wrap: wrap; }
.row > label { flex: 1 1 160px; }
input, textarea {
  font: inherit;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--fg);
  width: 100%;
}
input:focus, textarea:focus {
  outline: 2px solid var(--brand);
  outline-offset: 0;
  border-color: var(--brand);
}
textarea { resize: vertical; font-weight: 400; }
.req { color: var(--err); }
.opt { color: var(--muted); font-weight: 400; font-size: 0.85em; }
.hint { color: var(--muted); font-weight: 400; font-size: 0.85em; }
button {
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--brand);
  border: 0;
  border-radius: 8px;
  padding: 12px 16px;
  cursor: pointer;
}
button:hover { background: var(--brand-dark); }
button:disabled { background: #9aa4af; cursor: not-allowed; }
.muted { color: var(--muted); font-size: 0.9em; }
#progress-wrap { display: flex; flex-direction: column; gap: 6px; }
.bar {
  height: 10px;
  background: #e6e9ed;
  border-radius: 6px;
  overflow: hidden;
}
#bar-fill {
  height: 100%;
  width: 0%;
  background: var(--brand);
  transition: width 0.15s ease;
}
#status { margin: 0; font-weight: 600; min-height: 1.2em; }
#status.err { color: var(--err); }
#status.ok { color: var(--ok); }
.done {
  background: #eef7f0;
  border: 1px solid #bfe2c8;
  border-radius: 12px;
  padding: 20px;
  margin-top: 16px;
}
.done h2 { margin: 0 0 8px; color: var(--ok); }
.foot { margin-top: 20px; }
code { background: #eceff2; padding: 1px 6px; border-radius: 4px; }

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e8ea; --muted: #9aa2ab; --line: #333a41;
    --bg: #16191c; --card: #1e2227; --brand: #4a92e0; --brand-dark: #6aa8ec;
  }
  input, textarea { background: #14171a; }
  .bar { background: #2a2f35; }
  .done { background: #16241a; border-color: #2c4a34; }
  code { background: #2a2f35; }
}