* { box-sizing: border-box; margin: 0; padding: 0; }

    body {
      font-family: 'Segoe UI', sans-serif;
      background: #f0f4f8;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      padding: 40px 16px;
    }

    .card {
      background: #fff;
      border-radius: 12px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
      padding: 48px 40px;
      width: 100%;
      max-width: 460px;
    }

    .back-link {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 13px;
      color: #667eea;
      text-decoration: none;
      margin-bottom: 24px;
      cursor: pointer;
    }

    .back-link:hover { text-decoration: underline; }

    h1 {
      font-size: 24px;
      font-weight: 700;
      color: #1a202c;
      margin-bottom: 8px;
    }

    .subtitle {
      font-size: 14px;
      color: #718096;
      margin-bottom: 28px;
    }

    .form-group {
      margin-bottom: 18px;
    }

    label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #4a5568;
      margin-bottom: 6px;
    }

    .required::after {
      content: ' *';
      color: #e53e3e;
    }

    input, select {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      font-size: 14px;
      color: #2d3748;
      outline: none;
      transition: border-color 0.2s;
      background: #fff;
    }

    input:focus, select:focus { border-color: #667eea; }
    input.error, select.error { border-color: #e53e3e; }

    .input-with-button {
      display: flex;
      gap: 8px;
      align-items: center;
    }

    .input-with-button input {
      flex: 1;
      min-width: 0;
    }

    .btn-check {
      flex: 0 0 auto;
      padding: 10px 12px;
      border: 1.5px solid #667eea;
      border-radius: 8px;
      background: #fff;
      color: #667eea;
      font-size: 13px;
      font-weight: 700;
      cursor: pointer;
      white-space: nowrap;
    }

    .btn-check:hover { background: #ebf4ff; }

    .field-hint {
      font-size: 12px;
      color: #a0aec0;
      margin-top: 4px;
    }

    .field-hint.ok { color: #38a169; }
    .field-hint.error { color: #e53e3e; }

    .section-divider {
      font-size: 12px;
      font-weight: 700;
      color: #a0aec0;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin: 28px 0 16px;
      padding-bottom: 6px;
      border-bottom: 1px solid #e2e8f0;
    }

    .btn-primary {
      width: 100%;
      padding: 12px;
      background: #667eea;
      color: #fff;
      border: none;
      border-radius: 8px;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.2s;
      margin-top: 8px;
    }

    .btn-primary:hover { background: #5a67d8; }
    .btn-primary:disabled { background: #a0aec0; cursor: not-allowed; }

    .error-msg {
      display: none;
      color: #e53e3e;
      font-size: 13px;
      margin-top: 12px;
      text-align: center;
      white-space: pre-line;
    }

    .success-msg {
      display: none;
      color: #38a169;
      font-size: 13px;
      margin-top: 12px;
      text-align: center;
    }

    .role-tabs {
      display: flex;
      gap: 8px;
      margin-bottom: 20px;
    }

    .role-tab {
      flex: 1;
      padding: 10px;
      border: 1.5px solid #e2e8f0;
      border-radius: 8px;
      background: #fff;
      color: #718096;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
    }

    .role-tab.active {
      border-color: #667eea;
      color: #667eea;
      background: #ebf4ff;
    }