:root {
  --bg: #0f1115;
  --card: #171a21;
  --border: #2a2f3a;
  --text: #e6e8ec;
  --muted: #9aa3b2;
  --accent: #4f8cff;
  --accent-2: #3a6fd8;
  --ok: #2ecc71;
  --err: #ff5c5c;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 32px 20px 80px; }
header.brand { display: flex; align-items: baseline; gap: 12px; margin-bottom: 6px; }
header.brand h1 { font-size: 1.5rem; margin: 0; }
header.brand .tag { color: var(--muted); font-size: .85rem; }
.subtitle { color: var(--muted); margin: 0 0 24px; font-size: .95rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; }
.field label .req { color: var(--accent); margin-left: 2px; }
.field .hint { color: var(--muted); font-size: .78rem; margin-top: 4px; }
input, select, textarea {
  width: 100%; padding: 10px 12px; background: #0f131a; color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; font-size: .95rem; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
.section { margin: 26px 0 10px; padding-top: 14px; border-top: 1px solid var(--border);
  font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 8px; }
.check { display: flex; align-items: center; gap: 8px; background: #0f131a; border: 1px solid var(--border);
  border-radius: 8px; padding: 9px 11px; cursor: pointer; font-size: .9rem; }
.check input { width: auto; }
.check.on { border-color: var(--accent); background: #14203a; }
button {
  margin-top: 20px; width: 100%; padding: 13px; background: var(--accent); color: #fff;
  border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer;
}
button:hover { background: var(--accent-2); }
button:disabled { opacity: .6; cursor: not-allowed; }
.msg { margin-top: 18px; padding: 14px 16px; border-radius: 8px; display: none; font-size: .92rem; white-space: pre-wrap; }
.msg.ok { display: block; background: rgba(46,204,113,.12); border: 1px solid var(--ok); color: #b9f6ce; }
.msg.err { display: block; background: rgba(255,92,92,.1); border: 1px solid var(--err); color: #ffc9c9; }
.loading { color: var(--muted); font-size: .9rem; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 540px) { .row2 { grid-template-columns: 1fr; } }