:root {
  --bg: #f7f3ea;
  --card: #fffdf8;
  --text: #2c2a33;
  --muted: #736f7c;
  --accent: #1f1d1a;
  --accent-text: #fff;
  --border: #e6e0d2;
  --error: #b3372f;
  color-scheme: light;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
main { max-width: 560px; margin: 0 auto; padding: 40px 16px; }
header { text-align: center; margin-bottom: 24px; }
header img { border-radius: 14px; }
h1 { margin: 12px 0 4px; font-size: 24px; }
h2 { margin: 0 0 4px; font-size: 18px; }
header p { margin: 0; color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  margin-bottom: 16px;
}
label { display: block; font-weight: 500; margin-bottom: 8px; }
textarea {
  display: block;
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: inherit;
  font: 14px/1.5 ui-monospace, Consolas, monospace;
  resize: vertical;
}
textarea:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button {
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button:disabled { opacity: .6; cursor: default; }
form button { width: 100%; margin-top: 12px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.actions button { flex: 1 1 160px; }
.error { color: var(--error); margin: 12px 0 0; }
.muted { color: var(--muted); margin: 0; }
.note { font-size: 13px; text-align: center; }
ol { margin: 0; padding-left: 20px; font-size: 14px; }