:root {
  --bg: #f4f1ec;
  --card: #ffffff;
  --text: #1f2a24;
  --muted: #5f6b65;
  --accent: #2f5d50;
  --accent-ink: #ffffff;
  --border: #d9d4cc;
  --error: #a33a2a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15201b;
    --card: #1e2b25;
    --text: #eef2ef;
    --muted: #a7b3ac;
    --accent: #7fbfa6;
    --accent-ink: #0f1a15;
    --border: #35463e;
    --error: #f08b7a;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding: 16px;
  min-height: 100vh;
}
.card {
  background: var(--card);
  border-radius: 16px;
  padding: 24px 20px;
  max-width: 520px;
  margin: 0 auto;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}
.eyebrow { text-transform: uppercase; letter-spacing: 0.12em; font-size: 12px; color: var(--accent); margin: 0 0 4px; }
h1 { font-size: 24px; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 0 0 8px; }
.muted { color: var(--muted); }
header p { margin: 0 0 12px; }
form { margin-top: 20px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field { display: block; margin: 0 0 18px; border: 0; padding: 0; min-width: 0; }
.field > span, legend { display: block; font-weight: 600; margin-bottom: 6px; }
.field small { display: block; margin-top: 4px; font-size: 13px; }
input[type="text"], input[type="email"], textarea {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.choice { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px; cursor: pointer; }
.choice input { width: 20px; height: 20px; margin: 0; accent-color: var(--accent); }
button {
  width: 100%;
  font: inherit;
  font-weight: 600;
  font-size: 17px;
  background: var(--accent);
  color: var(--accent-ink);
  border: 0;
  border-radius: 12px;
  padding: 14px;
  cursor: pointer;
}
button[disabled] { opacity: 0.6; cursor: wait; }
.error { color: var(--error); font-weight: 600; margin: 0 0 12px; }
.invalid { border-color: var(--error) !important; }
.result { margin-top: 20px; }
.hp { position: absolute; left: -10000px; top: auto; width: 1px; height: 1px; overflow: hidden; }