/* Фолбэк-палитра для открытия вне Telegram. Внутри Telegram цвета берутся из темы клиента. */
:root {
  --fb-bg: #ffffff;
  --fb-text: #15171c;
  --fb-hint: #6f7581;
  --fb-sec: #f0f1f4;
  --fb-btn: #2b56c6;
  --fb-btn-text: #ffffff;
  --fb-link: #2b56c6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fb-bg: #17191e;
    --fb-text: #eceef2;
    --fb-hint: #8e94a0;
    --fb-sec: #0f1014;
    --fb-btn: #5b84ef;
    --fb-btn-text: #ffffff;
    --fb-link: #86a6f6;
  }
}

:root {
  --bg: var(--tg-theme-bg-color, var(--fb-bg));
  --text: var(--tg-theme-text-color, var(--fb-text));
  --hint: var(--tg-theme-hint-color, var(--fb-hint));
  --sec: var(--tg-theme-secondary-bg-color, var(--fb-sec));
  --btn: var(--tg-theme-button-color, var(--fb-btn));
  --btn-text: var(--tg-theme-button-text-color, var(--fb-btn-text));
  --link: var(--tg-theme-link-color, var(--fb-link));

  /* Собственный акцент курса: сигнальный янтарь, цвет прогресса */
  --signal: #d9951a;
  --signal-ink: #2a1d00;
  --signal-soft: rgba(217, 149, 26, 0.13);
  --signal-mid: rgba(217, 149, 26, 0.45);
  --ok: #24915a;
  --ok-soft: rgba(36, 145, 90, 0.14);
  --bad: #cc4232;
  --bad-soft: rgba(204, 66, 50, 0.13);
  --line: rgba(128, 134, 148, 0.28);

  --display: "Unbounded", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --body: "Onest", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.55 var(--body);
  -webkit-tap-highlight-color: transparent;
}
#app {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 18px calc(36px + env(safe-area-inset-bottom, 0px));
}
a { color: var(--link); }
h1, h2, h3 { margin: 0; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; border-radius: 6px; }
.loading { color: var(--hint); }

/* ---------- Главная ---------- */
.hero { padding: 10px 0 28px; }
.hero-title {
  font: 600 34px/1.08 var(--display);
  letter-spacing: -0.02em;
}
.hero-sub { margin: 12px 0 0; color: var(--hint); max-width: 32em; }
.hero-meta { margin: 16px 0 0; font-weight: 600; }

/* Стек модулей с «хребтом» прогресса слева */
.stack { list-style: none; margin: 0; padding: 0; }
.layer { position: relative; }
.layer::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--line);
}
.layer:first-child::before { top: 22px; }
.layer:last-child::before { bottom: auto; height: 22px; }
.layer.active::before { background: linear-gradient(var(--signal) var(--p), var(--line) var(--p)); }
.layer.done::before { background: var(--signal); }
.layer > a {
  position: relative;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 0 0 22px;
  color: inherit;
  text-decoration: none;
}
.node {
  position: relative;
  z-index: 1;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font: 600 15px/1 var(--display);
  background: var(--bg);
  border: 2px solid var(--line);
  color: var(--hint);
}
.layer.active .node { border-color: var(--signal); color: var(--text); }
.layer.done .node { background: var(--signal); border-color: var(--signal); color: var(--signal-ink); }
.layer-body { padding-top: 2px; min-width: 0; }
.layer-title { display: block; font-weight: 600; font-size: 17px; line-height: 1.3; }
.layer-sub { display: block; color: var(--hint); font-size: 14px; line-height: 1.4; margin-top: 3px; }
.layer-status { display: block; font-size: 13px; margin-top: 6px; color: var(--hint); }
.layer.active .layer-status, .layer.done .layer-status { color: var(--text); }
.layer > a:active .layer-title { color: var(--link); }

.tools { margin-top: 8px; border-top: 1px solid var(--line); }
.tool {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
}
.tool-title { font-weight: 600; }
.tool-meta { color: var(--hint); font-size: 14px; text-align: right; }
.foot {
  margin-top: 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--hint);
  font-size: 13px;
}
.linkbtn {
  background: none;
  border: 0;
  padding: 8px 0;
  color: var(--hint);
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

/* ---------- Шапка внутренних экранов ---------- */
.back {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 0;
  font-weight: 600;
  text-decoration: none;
}
.mod-head { padding: 2px 0 18px; }
.mod-num { margin: 0 0 6px; color: var(--hint); font-size: 14px; }
.mod-title { font: 600 23px/1.22 var(--display); letter-spacing: -0.01em; }
.mod-sub { margin: 8px 0 0; color: var(--hint); }

.tabs {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  gap: 4px;
  padding: 4px;
  margin: 0 0 18px;
  background: var(--sec);
  border-radius: 12px;
}
.tab {
  flex: 1;
  padding: 9px 6px;
  border-radius: 9px;
  text-align: center;
  text-decoration: none;
  color: var(--hint);
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
}
.tab[aria-selected="true"] {
  background: var(--bg);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}
.tab-n { font-weight: 500; opacity: 0.7; font-size: 13px; }
@media (max-width: 360px) { .tab { font-size: 14px; } .tab-n { display: none; } }

/* ---------- Кнопки ---------- */
.btn {
  appearance: none;
  border: 0;
  border-radius: 12px;
  min-height: 48px;
  padding: 13px 16px;
  font: 600 16px/1.2 var(--body);
  background: var(--btn);
  color: var(--btn-text);
  cursor: pointer;
}
.btn.ghost { background: var(--sec); color: var(--text); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn.wide { width: 100%; }
.nav-row { display: flex; gap: 10px; margin-top: 20px; }
.nav-row .btn { flex: 1; }
.nav-row.sticky {
  position: sticky;
  bottom: 0;
  margin-top: 8px;
  padding: 12px 0 calc(12px + env(safe-area-inset-bottom, 0px));
  background: var(--bg);
}

/* ---------- Карточки ---------- */
.pager { display: flex; gap: 4px; margin-bottom: 16px; }
.pager span { flex: 1; height: 3px; border-radius: 2px; background: var(--line); }
.pager span.seen { background: var(--signal-mid); }
.pager span.cur { background: var(--signal); }
.card { touch-action: pan-y; }
.card-pos { margin: 0 0 8px; color: var(--hint); font-size: 14px; }
.card-title { font: 600 20px/1.3 var(--display); margin-bottom: 14px; letter-spacing: -0.01em; }
.card p { margin: 0 0 12px; }
.ex {
  margin: 18px 0;
  padding: 2px 0 2px 14px;
  border-left: 3px solid var(--signal);
}
.ex h3, .you h3 { font: 600 14px/1.3 var(--body); margin-bottom: 4px; }
.ex h3 { color: var(--hint); }
.ex p, .you p { margin: 0; }
.you {
  margin: 18px 0 4px;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--signal-soft);
}

/* ---------- Флеш-карты ---------- */
.fc-meta { margin: 0 0 12px; font-weight: 600; }
.flash {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  perspective: 1200px;
}
.flash-inner {
  display: grid;
  transform-style: preserve-3d;
  transition: transform 0.45s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.flash.flipped .flash-inner { transform: rotateY(180deg); }
.flash-face {
  grid-area: 1 / 1;
  min-height: 260px;
  padding: 26px 22px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--sec);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}
.flash-face.front { border-left: 4px solid var(--signal); }
.flash-face.back { transform: rotateY(180deg); justify-content: flex-start; }
.flash-term { font: 600 22px/1.28 var(--display); letter-spacing: -0.01em; }
.flash-term.small { font: 600 15px/1.3 var(--body); color: var(--hint); }
.flash-hint { color: var(--hint); font-size: 14px; }
.flash-def { font-size: 17px; line-height: 1.55; font-weight: 400; }
.fc-left { margin: 12px 0 0; text-align: center; color: var(--hint); font-size: 14px; }

/* ---------- Тест ---------- */
.quiz-intro p { margin: 0 0 10px; }
.quiz-intro .btn { margin-top: 10px; }
.hint { color: var(--hint); }
.q-progress { height: 4px; margin-bottom: 14px; border-radius: 2px; background: var(--line); overflow: hidden; }
.q-progress span { display: block; height: 100%; background: var(--signal); transition: width 0.3s; }
.q-meta { margin: 0 0 8px; color: var(--hint); font-size: 14px; }
.q-text { font: 600 19px/1.4 var(--body); margin-bottom: 16px; }
.opts { display: grid; gap: 8px; }
.opt {
  padding: 14px 16px;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
}
.opt:disabled { cursor: default; color: var(--text); }
.opt.right { border-color: var(--ok); background: var(--ok-soft); }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt.dim { opacity: 0.5; }
.fb { margin: 16px 0 14px; padding: 14px 16px; border-radius: 12px; }
.fb.ok { background: var(--ok-soft); }
.fb.bad { background: var(--bad-soft); }
.fb p { margin: 0; }
.fb .fb-head { font-weight: 700; margin-bottom: 4px; }
.result { padding: 18px 0 6px; }
.result-score { margin: 0; font: 600 56px/1 var(--display); letter-spacing: -0.03em; }
.result.pass .result-score { color: var(--ok); }
.result.fail .result-score { color: var(--bad); }
.result-line { margin: 12px 0 0; }
.mist-h { margin: 24px 0 10px; font: 600 17px/1.3 var(--body); }
.mist { margin: 0; padding-left: 20px; }
.mist li { margin-bottom: 16px; }
.mist p { margin: 0 0 4px; }
.mist-q { font-weight: 600; }
.mist-a { color: var(--ok); }
.mist-e { color: var(--hint); font-size: 15px; }

/* ---------- Пустые состояния ---------- */
.empty { padding: 8px 0; }
.empty h2 { font: 600 20px/1.3 var(--display); margin-bottom: 8px; }
.empty p { margin: 0; color: var(--hint); }

/* ---------- Глоссарий ---------- */
.search {
  width: 100%;
  margin-bottom: 6px;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  background: var(--sec);
  color: var(--text);
  font: inherit;
}
.search::placeholder { color: var(--hint); }
.gloss { margin: 0; }
.g-item { padding: 14px 0; border-bottom: 1px solid var(--line); }
.g-item dt { font-weight: 700; margin-bottom: 4px; }
.g-item dd { margin: 0; }
.g-mod { margin-left: 4px; color: var(--hint); font-size: 13px; white-space: nowrap; }
.empty-line { color: var(--hint); margin-top: 16px; }

@media (min-width: 560px) {
  .hero-title { font-size: 42px; }
  .mod-title { font-size: 26px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* ---------- Дашборд владельца ---------- */
.foot-actions { display: flex; gap: 16px; align-items: center; }
.kpis { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-bottom: 22px; }
.kpi { background: var(--sec); border-radius: 14px; padding: 14px 14px 12px; }
.kpi b { display: block; font: 600 24px/1.1 var(--display); }
.kpi span { color: var(--hint); font-size: 13px; }
.dash-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.dash-row { padding: 14px 0; border-bottom: 1px solid var(--line); }
.dash-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.dash-name { font-weight: 600; overflow-wrap: anywhere; }
.dash-tag { font-size: 11px; font-weight: 600; color: var(--signal-ink); background: var(--signal-mid);
  border-radius: 6px; padding: 1px 6px; vertical-align: 2px; }
.dash-pct { font-weight: 600; font-variant-numeric: tabular-nums; }
.dash-bar { height: 5px; border-radius: 3px; background: var(--signal-soft); margin: 8px 0; overflow: hidden; }
.dash-bar i { display: block; height: 100%; background: var(--signal); border-radius: 3px; }
.dash-meta { color: var(--hint); font-size: 13px; line-height: 1.5; overflow-wrap: anywhere; }
.dash-meta a { color: var(--link); text-decoration: none; }
.dash-meta .ok { color: var(--ok); }
.dash-meta .bad { color: var(--bad); }