:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1c1f2a;
  --muted: #5f6577;
  --accent: #2f6df6;
  --accent-dark: #1f4fc2;
  --star: #f5b400;
  --line: #e3e6ef;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12141b; --card: #1b1e28; --text: #eef0f6; --muted: #a0a6b8; --line: #2c3040; --accent: #6f9bff; --accent-dark: #4f7fe6;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding: 24px 16px 48px;
}
.wrap { max-width: 640px; margin: 0 auto; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-top: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; text-decoration: none; color: var(--text); }
.brand .dot { width: 32px; height: 32px; border-radius: 9px; background: var(--accent); display: grid; place-items: center; color: #fff; font-size: 18px; }
h1 { font-size: 30px; line-height: 1.2; margin: 6px 0 12px; }
h2 { font-size: 20px; margin: 24px 0 8px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
ol.steps { padding-left: 22px; }
ol.steps li { margin: 10px 0; }
code { background: rgba(127,127,127,.14); padding: 2px 6px; border-radius: 6px; font-size: 15px; }
.btn {
  display: inline-block; border: 0; cursor: pointer; text-decoration: none;
  background: var(--accent); color: #fff; font-weight: 600; font-size: 17px;
  padding: 12px 20px; border-radius: 10px; margin-top: 8px;
}
.btn:hover { background: var(--accent-dark); }
.btn.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
label { display: block; font-weight: 600; margin: 16px 0 6px; }
input[type=text], input[type=email], textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px; padding: 12px;
}
textarea { min-height: 120px; resize: vertical; }
.stars { display: flex; gap: 6px; font-size: 34px; line-height: 1; margin: 6px 0 4px; }
.stars button { background: none; border: 0; cursor: pointer; color: #c9ccd6; font-size: inherit; padding: 2px; }
.stars button.on { color: var(--star); }
.pin { display: flex; gap: 12px; align-items: flex-start; background: rgba(47,109,246,.08); border-radius: 10px; padding: 12px 14px; margin: 14px 0; }
.pin img { width: 120px; border-radius: 6px; border: 1px solid var(--line); }
.thanks { display: none; }
.foot { margin-top: 28px; font-size: 14px; color: var(--muted); }
.foot a { color: var(--muted); }
.hidden { display: none !important; }