:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1d2330;
  --muted: #6b7280;
  --line: #e2e5ea;
  --accent: #3b6cf6;
  --accent-text: #ffffff;
  --good: #16a34a;
  --bad: #dc2626;
  --field: #0f172a;
  --letter: #f8fafc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --card: #151b26;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --line: #273042;
    --accent: #5b85ff;
    --good: #22c55e;
    --bad: #f87171;
    --field: #05080e;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.app { max-width: 820px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { margin: 0 0 4px; font-size: 32px; }
h2 { margin: 0 0 12px; font-size: 20px; }
.subtitle, .muted { color: var(--muted); }
.subtitle { margin: 0 0 20px; }
.good { color: var(--good); }
.bad { color: var(--bad); }

.screen { display: none; }
.screen.active { display: block; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.row {
  display: grid;
  grid-template-columns: 140px 1fr;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
input, select, button { font: inherit; color: inherit; }
input:not([type]), input[type="text"], select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
}
.segmented { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { display: block; padding: 8px 16px; cursor: pointer; }
.segmented input:checked + span { background: var(--accent); color: var(--accent-text); }
.segmented input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: -2px; }
.check { display: flex; gap: 8px; align-items: center; margin: 4px 0 18px; }

button {
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.link { border: 0; background: none; padding: 0; color: var(--muted); text-decoration: underline; }
button:disabled { opacity: .5; cursor: default; }

.history-head { display: flex; justify-content: space-between; align-items: baseline; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { color: var(--muted); font-weight: 500; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table-wrap { overflow-x: auto; }

/* Игра */
.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 10px;
  font-variant-numeric: tabular-nums;
}
#hud-info { color: var(--muted); margin-right: auto; }
.playfield {
  position: relative;
  height: min(70vh, 560px);
  background: var(--field);
  border-radius: 12px;
  overflow: hidden;
  user-select: none;
}
.playfield::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 4px;
  background: var(--bad);
  opacity: .6;
}
.letter {
  position: absolute;
  top: 0;
  width: 56px;
  margin-left: -28px;
  text-align: center;
  font: 700 44px/56px ui-monospace, Menlo, Consolas, monospace;
  color: var(--letter);
  will-change: transform;
}
.letter.hit { color: var(--good); animation: pop .25s ease-out forwards; }
.letter.missed { color: var(--bad); animation: fade .4s ease-out forwards; }
@keyframes pop { to { opacity: 0; scale: 1.8; } }
@keyframes fade { to { opacity: 0; } }
.playfield.flash { box-shadow: inset 0 0 0 4px var(--bad); }

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(5, 8, 14, .7);
  color: #fff;
  font-size: 56px;
  font-weight: 700;
  z-index: 2;
}
.overlay[hidden] { display: none; }
.overlay small { font-size: 16px; font-weight: 400; opacity: .8; }
.hint { color: var(--muted); font-size: 14px; }

/* Результат */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 16px 0;
}
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.stat b { display: block; font-size: 28px; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: 14px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }

@media (max-width: 520px) {
  .row { grid-template-columns: 1fr; gap: 4px; }
}