:root {
    --ink: #0f172a; --ink-soft: #334155; --muted: #64748b;
    --line: #e2e8f0; --bg: #ffffff; --bg-soft: #f8fafc;
    --accent: #2563eb; --accent-dk: #1d4ed8; --accent-soft: #dbeafe;
  }
  * { box-sizing: border-box; }
  body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: var(--bg-soft); line-height: 1.55; }
  header.nav { background: #fff; border-bottom: 1px solid var(--line); padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; }
  header.nav a { color: var(--ink-soft); text-decoration: none; font-size: 14px; margin-left: 18px; }
  .logo { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; }
  .logo span { color: var(--accent); }

  .container { max-width: 720px; margin: 0 auto; padding: 56px 24px; }
  h1 { font-size: 32px; margin: 0 0 8px; letter-spacing: -0.02em; font-weight: 700; }
  p.lead { font-size: 16px; color: var(--ink-soft); margin: 0 0 32px; }

  form { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 28px; }
  .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .field { margin-bottom: 14px; }
  label { display: block; font-size: 13px; font-weight: 500; color: var(--ink-soft); margin-bottom: 5px; }
  input, select, textarea {
    width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
    font: inherit; color: var(--ink); background: #fff; outline: none; transition: border-color .12s;
  }
  input:focus, select:focus, textarea:focus { border-color: var(--accent); }
  textarea { min-height: 140px; resize: vertical; }
  .req { color: #b91c1c; }
  .honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

  .btn { display: inline-block; padding: 12px 22px; border: 0; border-radius: 8px; font-size: 14px; font-weight: 500; cursor: pointer; }
  .btn-primary { background: var(--ink); color: #fff; }
  .btn-primary:hover { background: var(--accent-dk); }
  .btn-primary:disabled { opacity: .55; cursor: not-allowed; }

  .ok  { background: #dcfce7; color: #166534; padding: 14px 16px; border-radius: 8px; margin-bottom: 18px; }
  .err { background: #fee2e2; color: #991b1b; padding: 12px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }

  .alt { margin-top: 22px; color: var(--muted); font-size: 13px; text-align: center; }
  .alt a { color: var(--accent); text-decoration: none; }

  @media (max-width: 600px) { .row { grid-template-columns: 1fr; } h1 { font-size: 26px; } }