:root {
  --bg: var(--tg-theme-bg-color, #fdfdfc);
  --fg: var(--tg-theme-text-color, #12100e);
  --muted: var(--tg-theme-hint-color, #8d8a85);
  --line: rgba(140, 135, 128, 0.28);
  --btn: var(--tg-theme-button-color, #12100e);
  --btn-fg: var(--tg-theme-button-text-color, #fdfdfc);
  --ok: #2f9e5f;
  --no: #d1435b;
  --tint-ok: rgba(47, 158, 95, 0.12);
  --tint-no: rgba(209, 67, 91, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--tg-theme-bg-color, #17171a);
    --fg: var(--tg-theme-text-color, #f2f1ef);
    --muted: var(--tg-theme-hint-color, #8f8d8a);
    --line: rgba(160, 158, 155, 0.24);
    --btn: var(--tg-theme-button-color, #f2f1ef);
    --btn-fg: var(--tg-theme-button-text-color, #17171a);
    --ok: #4cc182;
    --no: #ef6f80;
    --tint-ok: rgba(76, 193, 130, 0.14);
    --tint-no: rgba(239, 111, 128, 0.12);
  }
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  /* Полоса прокрутки в мини-аппе только мешает: обрезанный текст и так
     показывает, что дальше есть куда листать. */
  scrollbar-width: none;
  -ms-overflow-style: none;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar { width: 0; height: 0; display: none; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 34rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem calc(2rem + env(safe-area-inset-bottom));
}

/* шапка */

.top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.kicker,
.score,
.lang-opt {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.score { font-variant-numeric: tabular-nums; }

.tools {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex: none;
}

.lang { display: inline-flex; align-items: baseline; }

.lang-opt {
  position: relative;
  appearance: none;
  padding: 0.125rem 0.375rem;
  border: 0;
  background: none;
  font-family: inherit;
  line-height: 1;
  opacity: 0.5;
  cursor: pointer;
  transition: opacity 0.2s, color 0.2s;
}

/* Буквы мелкие, а палец нет: расширяем область нажатия, не трогая вёрстку. */
.lang-opt::after,
.switch::after {
  content: "";
  position: absolute;
  inset: -0.625rem -0.25rem;
}

.lang-opt + .lang-opt { border-left: 1px solid var(--line); }

.lang-opt.on {
  color: var(--fg);
  opacity: 1;
}

/* цитата */

.card { min-height: 6.5rem; }

.quote {
  margin: 0;
  font-family: ui-serif, Georgia, "Times New Roman", serif;
  font-size: 1.5rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.author {
  margin: 1rem 0 0;
  font-size: 0.9375rem;
  color: var(--muted);
  animation: rise 0.35s ease both;
}

.author::before { content: "— "; }

/* перевод ↔ оригинал */

.switch {
  position: relative;
  appearance: none;
  margin: 1rem 0 0;
  padding: 0 0 1px;
  border: 0;
  border-bottom: 1px dashed var(--line);
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  animation: rise 0.3s ease both;
}

.switch:active { opacity: 0.6; }

.ask {
  margin: 1.75rem 0 0.875rem;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* варианты */

.options {
  display: grid;
  gap: 0.5rem;
}

.opt {
  appearance: none;
  width: 100%;
  padding: 0.9375rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.875rem;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, opacity 0.2s, transform 0.1s;
  animation: rise 0.3s ease both;
}

.opt:active { transform: scale(0.99); }

.options.locked .opt { cursor: default; }
.options.locked .opt:active { transform: none; }

.opt.correct {
  border-color: var(--ok);
  background: var(--tint-ok);
  color: var(--ok);
}

.opt.wrong {
  border-color: var(--no);
  background: var(--tint-no);
  color: var(--no);
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}

.opt.dim { opacity: 0.4; }

/* разбор */

.reveal {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.verdict {
  margin: 0 0 1.25rem;
  font-size: 0.9375rem;
  animation: rise 0.3s ease both;
}

.verdict b { font-weight: 600; }
.verdict.yes b { color: var(--ok); }
.verdict.no b { color: var(--no); }

.topic {
  margin-left: 0.375rem;
  padding: 0.125rem 0.4375rem;
  border-radius: 0.375rem;
  background: var(--tint-ok);
  background: color-mix(in srgb, var(--muted) 14%, transparent);
  font-size: 0.75rem;
  color: var(--muted);
}

.item {
  padding: 0.875rem 0 0.875rem 0.875rem;
  border-left: 2px solid var(--line);
  animation: rise 0.35s ease both;
}

.item + .item { margin-top: 0.75rem; }

.item.is-answer { border-left-color: var(--ok); }

.who {
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.3125rem;
}

.item.is-answer .who { color: var(--ok); }

.said {
  font-family: ui-serif, Georgia, "Times New Roman", serif;
  font-size: 1rem;
  line-height: 1.45;
  text-wrap: pretty;
}

/* ещё */

.next {
  appearance: none;
  width: 100%;
  margin-top: 1.75rem;
  padding: 0.9375rem 1rem;
  border: 0;
  border-radius: 0.875rem;
  background: var(--btn);
  color: var(--btn-fg);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  animation: rise 0.35s ease both;
}

.next:active { opacity: 0.85; }

/* подпись */

.credit {
  margin: 2.5rem 0 0;
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  text-align: center;
  color: var(--muted);
  opacity: 0.6;
}

/* состояния */

.loading .quote {
  color: transparent;
  background: linear-gradient(90deg, var(--line), transparent 60%);
  background-size: 200% 100%;
  border-radius: 0.5rem;
  animation: shimmer 1.2s linear infinite;
}

.error {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

@keyframes shimmer {
  from { background-position: 100% 0; }
  to { background-position: -100% 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; }
}