:root {
  --primary: #09494E;
  --primary-hover: #0b5a60;
  --primary-active: #073a3e;
  --bg: rgba(247, 241, 237, 0.9);
  --text: #1a1a1a;
  --muted: #5a5a5a;
  --error: #b3261e;
  --border: #cdc6c1;
  --border-focus: #09494E;
  --radius: 10px;
}

* { box-sizing: border-box; }

/* Author display rules below override the UA [hidden] rule otherwise. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: transparent;
  font-family: 'Bitter', Georgia, serif;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
  line-height: 1.5;
}

.form-block {
  max-width: 640px;
  margin: 0 auto;
  padding: 28px 28px 32px;
  background: var(--bg);
  border-radius: 14px;
}

form { display: flex; flex-direction: column; gap: 16px; }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

@media (max-width: 540px) {
  .row { grid-template-columns: 1fr; }
  .form-block { padding: 20px; border-radius: 10px; }
}

fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 18px;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

legend {
  padding: 0 6px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary);
}

.field { display: flex; flex-direction: column; gap: 6px; }

label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}

.req { color: var(--primary); }
.optional { color: var(--muted); font-weight: 400; font-size: 0.85rem; }

input[type="text"],
input[type="email"],
select {
  font-family: inherit;
  font-size: 1rem;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  transition: border-color 120ms ease, box-shadow 120ms ease;
  width: 100%;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(9, 73, 78, 0.18);
}

input[aria-invalid="true"],
select[aria-invalid="true"] {
  border-color: var(--error);
}

.checkbox label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 400;
  cursor: pointer;
}

.checkbox input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

button[type="submit"] {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  padding: 13px 22px;
  border: none;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  transition: background-color 120ms ease, transform 80ms ease;
  margin-top: 4px;
}

button[type="submit"]:hover { background: var(--primary-hover); }
button[type="submit"]:active { background: var(--primary-active); transform: translateY(1px); }
button[type="submit"]:disabled { background: var(--muted); cursor: progress; opacity: 0.8; }

.form-error {
  color: var(--error);
  font-size: 0.9rem;
  margin: 0;
}

.thank-you {
  text-align: center;
  padding: 24px 8px 8px;
}

.thank-you h2 {
  font-family: inherit;
  color: var(--primary);
  margin: 0 0 8px;
}

.thank-you p { margin: 0; color: var(--text); }