.bt-form {
  max-width: 410px;
  margin: 12px auto;
  padding: 32px 28px;
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 6px 32px rgba(36,40,48,0.09), 0 1.5px 3px rgba(36,40,48,0.08);
  border: 1.5px solid #e5e9ef;
  font-family: 'Segoe UI', 'Arial', sans-serif;
}

#btRegForm input, #btRegForm select {
  margin: 0 !important;
}

#btRegForm .bt-form .bt-row {
  margin-bottom: 0 !important;
}

.bt-form label {
  font-size: 1rem;
  font-weight: 600;
  display: block;
  margin-bottom: 8px;
  color: #23395d;
  letter-spacing: .02em;
}
.bt-form input[type="text"],
.bt-form input[type="email"],
.bt-form input[type="password"],
.bt-form select,
.bt-form textarea {
  width: 100%;
  padding: 11px 14px;
  font-size: 1rem;
  border: 1.3px solid #ccd7e6;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #f7fafc;
  color: #142241;
  box-sizing: border-box;
}
.bt-form input[type="text"]:focus,
.bt-form input[type="email"]:focus,
.bt-form input[type="password"]:focus,
.bt-form select:focus,
.bt-form textarea:focus {
  border-color: #2188ff;
  background: #fff;
  box-shadow: 0 0 0 1.5px #2188ff33;
}
.bt-form input[type="submit"],
.bt-form .button.button-primary {
  width: 100%;
  padding: 12px 0;
  background: linear-gradient(90deg, #2188ff 0%, #1047a9 100%);
  color: #fff;
  border: none;
  border-radius: 7px;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .03em;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(33,136,255,0.09);
  transition: background 0.15s, box-shadow 0.15s;
}
.bt-form input[type="submit"]:hover,
.bt-form .button.button-primary:hover {
  background: linear-gradient(90deg, #1047a9 0%, #2188ff 100%);
  box-shadow: 0 4px 18px rgba(33,136,255,0.13);
}
.bt-form select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url('data:image/svg+xml;charset=UTF-8,<svg fill="gray" height="20" viewBox="0 0 20 20" width="20" xmlns="http://www.w3.org/2000/svg"><path d="M7 7l3-3 3 3" fill="none" stroke="gray" stroke-width="2"/></svg>');
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 18px 18px;
}
.bt-form .g-recaptcha {
  margin: 0 auto 16px auto;
  display: flex;
  justify-content: center;
}

.bt-error {
  border-color: #d60024 !important;
  background: #fff6f7 !important;
}
.bt-help {
  display: block;
  font-size: 0.95em;
  color: #d60024;
  margin-top: 4px;
  min-height: 20px;
  font-weight: 400;
  letter-spacing: 0.01em;
}


@media (max-width: 600px) {
  .bt-form {
      padding: 12px 8px;
      border-radius: 12px;
  }
  .bt-form input[type="submit"],
  .bt-form .button.button-primary {
      font-size: 1rem;
      padding: 11px 0;
  }
}