:root {
  color-scheme: dark;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
  color: #17202a;
  background: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

.form-shell {
  width: min(100%, 720px);
  margin: 0 auto;
  padding: 20px;
}

.contact-form {
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 6px;
  font-weight: 700;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid #b9c2cc;
  border-radius: 6px;
  padding: 11px 12px;
  font: inherit;
  color: #17202a;
  background: #ffffff;
}

.field textarea {
  resize: vertical;
  min-height: 150px;
}

.field input:focus,
.field textarea:focus {
  border-color: #2463a6;
  outline: 3px solid rgba(36, 99, 166, 0.18);
}

.checkbox {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  align-items: start;
  font-size: 14px;
}

.checkbox input {
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
}

a {
  color: #0f5e9c;
}

.captcha-status {
  margin: 0;
  color: #52606d;
  font-size: 14px;
}

.form-message {
  border-radius: 6px;
  padding: 12px;
  font-weight: 700;
}

.form-message.is-success {
  color: #10572a;
  background: #e6f4ea;
}

.form-message.is-error {
  color: #8a1c1c;
  background: #fdeaea;
}

button {
  min-height: 46px;
  border: 0;
  border-radius: 6px;
  padding: 11px 18px;
  font: inherit;
  font-weight: 700;
  color: #ffffff;
  background: var(--button-color, #1f5f99);
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

@media (max-width: 520px) {
  .form-shell {
    padding: 14px;
  }
}