:root {
  --bg: #14161a; --panel: #1e2228; --fg: #e8e6e3; --muted: #9aa4b0;
  --accent: #c8553d; --ok: #4c9a5b; --bad: #b3452f; --line: #2c313a;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", "Noto Sans CJK SC", sans-serif;
}
#app { max-width: 640px; margin: 0 auto; padding: 24px 18px 60px; }
h1, h2 { font-weight: 600; }
.center, .home { display: flex; flex-direction: column; gap: 12px; }
.center { align-items: center; text-align: center; padding-top: 12vh; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.hint { color: var(--muted); font-style: italic; }
.bar { display: flex; justify-content: space-between; color: var(--muted); font-size: 14px;
  border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.cardbox { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 22px 0; }
.glyph { font-size: 96px; line-height: 1.1; }
.prompt { white-space: pre-line; font-size: 18px; }
.answer, .peek {
  white-space: pre-line; background: var(--panel); border: 1px solid var(--line);
  border-radius: 8px; padding: 12px 14px; font-family: inherit; margin: 8px 0;
}
.peek { max-height: 60vh; overflow: auto; }
.hidden { display: none; }
input, textarea, button {
  font: inherit; color: var(--fg); background: var(--panel);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px;
}
input, textarea { width: 100%; }
form { display: flex; gap: 8px; }
form input { flex: 1; }
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.row { display: flex; gap: 8px; margin-top: 8px; }
.actions, .grades { display: flex; flex-wrap: wrap; gap: 8px; }
.grades button { flex: 1; min-width: 72px; }
.ok { color: var(--ok); } .bad { color: var(--bad); }
ul.plain { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 14px; }
.results { display: flex; flex-direction: column; gap: 4px; max-height: 60vh; overflow: auto; }
.result { display: flex; gap: 10px; align-items: baseline; padding: 8px; border-radius: 6px; cursor: pointer; }
.result:hover { background: var(--panel); }
.result b { font-size: 20px; }