:root {
  --bg: var(--tg-theme-bg-color, #fff);
  --text: var(--tg-theme-text-color, #000);
  --hint: var(--tg-theme-hint-color, #8a8a8e);
  --accent: var(--tg-theme-button-color, #2481cc);
  --accent-text: var(--tg-theme-button-text-color, #fff);
  --card: var(--tg-theme-secondary-bg-color, #f1f1f4);
  --good: #31b545;
  --bad: #e5484d;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body {
  font: 16px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 16px 16px calc(16px + env(safe-area-inset-bottom));
  -webkit-tap-highlight-color: transparent;
}
button { font: inherit; color: inherit; cursor: pointer; }
.hero h1 { margin: 4px 0 0; font-size: 28px; }
.hint { color: var(--hint); margin: 2px 0 16px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 16px; }
.stat { background: var(--card); border-radius: 12px; padding: 10px; text-align: center; }
.stat b { display: block; font-size: 20px; }
.stat span { font-size: 12px; color: var(--hint); }

.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mode {
  text-align: left; border: 0; border-radius: 14px; padding: 12px;
  background: var(--card); display: flex; flex-direction: column; gap: 2px;
}
.mode span { font-size: 13px; color: var(--hint); }
.mode.primary { grid-column: 1 / -1; background: var(--accent); color: var(--accent-text); }
.mode.primary span { color: inherit; opacity: .8; }
.mode:active { opacity: .7; }

.q-text { font-size: 20px; margin: 8px 0 20px; white-space: pre-wrap; }
.q-text strong { color: var(--accent); }
.options { display: flex; flex-direction: column; gap: 8px; }
.option {
  border: 2px solid transparent; border-radius: 12px; padding: 14px;
  background: var(--card); text-align: left; font-size: 17px;
}
.option:disabled { cursor: default; }
.option.correct { border-color: var(--good); background: color-mix(in srgb, var(--good) 18%, var(--card)); }
.option.wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 18%, var(--card)); }
.translation { margin-top: 16px; color: var(--hint); font-style: italic; }
.report { margin-top: 16px; background: var(--card); border-radius: 12px; padding: 14px; white-space: pre-wrap; }

#vocab-search {
  width: 100%; padding: 10px 12px; border-radius: 10px; border: 0;
  background: var(--card); color: var(--text); font: inherit; margin-bottom: 12px;
}
.cat h2 { font-size: 15px; color: var(--hint); text-transform: uppercase; letter-spacing: .03em; margin: 16px 0 6px; }
.word { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--card); }
.word .gr { font-weight: 600; }
.word .gr i { font-weight: 400; color: var(--hint); font-style: normal; }
.word .en { color: var(--hint); text-align: right; }

.error {
  position: fixed; left: 16px; right: 16px; bottom: 16px; padding: 12px;
  border-radius: 12px; background: var(--bad); color: #fff;
}