/* ===== 1. ЦВЕТА =====
   Все цвета в одном месте. Тёмная тема просто подменяет их. */
:root {
  --bg: #F2F3F5;
  --card: #FFFFFF;
  --text: #1A1A1A;
  --muted: #5E6470;
  --line: #E6E8EC;
  --accent: #3D5AFE;
  --accent-soft: #E4E8FF;
  --good: #1E7A45;
  --good-soft: #DDF3E6;
  --warn: #8A5300;
  --warn-soft: #FFF0D6;
  --bad: #A3201D;
  --bad-soft: #FDE2E2;
  --radius: 24px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111216; --card: #1E1F24; --text: #F2F2F2; --muted: #A3A8B3;
    --line: #33353D; --accent: #5B74FF; --accent-soft: #262A3D;
    --good: #5FD18F; --good-soft: #1C3326; --warn: #F2B65A; --warn-soft: #3A2E1A;
    --bad: #FF8A84; --bad-soft: #3A1F1F;
  }
}
:root[data-theme="dark"] {
  --bg: #111216; --card: #1E1F24; --text: #F2F2F2; --muted: #A3A8B3;
  --line: #33353D; --accent: #5B74FF; --accent-soft: #262A3D;
  --good: #5FD18F; --good-soft: #1C3326; --warn: #F2B65A; --warn-soft: #3A2E1A;
  --bad: #FF8A84; --bad-soft: #3A1F1F;
}

/* ===== 2. ОБЩЕЕ ===== */
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Manrope, system-ui, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
button, input { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
button:disabled { cursor: default; opacity: .6; }
svg {
  width: 22px; height: 22px; flex-shrink: 0;
  fill: none; stroke: currentColor; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
}

/* ===== 3. РАСКЛАДКА: телефон ===== */
.app { min-height: 100vh; }
.screens {
  max-width: 560px;
  margin: 0 auto;
  padding: 20px 16px calc(96px + env(safe-area-inset-bottom));
  display: flex; flex-direction: column; gap: 14px;
}
.screen, .stack { display: flex; flex-direction: column; gap: 14px; }

/* ===== 4. МЕНЮ ===== */
.menu {
  position: fixed; left: 0; right: 0; bottom: 0;
  padding-bottom: env(safe-area-inset-bottom);
  background: var(--card);
  border-top: 1px solid var(--line);
  z-index: 10;
}
.menu__items {
  height: 68px;
  display: grid; grid-template-columns: repeat(var(--items, 4), 1fr);
}
.menu__logo { display: none; }
.menu__item {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 4px; font-size: 11px; font-weight: 600; color: var(--muted);
}
.menu__item.is-active { color: var(--accent); font-weight: 700; }

/* ===== 5. РАСКЛАДКА: ноутбук ===== */
@media (min-width: 900px) {
  .app { display: flex; gap: 24px; padding: 24px; }
  .menu {
    position: sticky; top: 24px;
    width: 240px; align-self: flex-start;
    border: none; border-radius: var(--radius); padding: 16px;
  }
  .menu__items { height: auto; display: flex; flex-direction: column; gap: 4px; }
  .menu__logo {
    display: flex; align-items: center; gap: 10px;
    font-size: 18px; font-weight: 800; padding: 4px 6px 14px;
  }
  .menu__item {
    flex-direction: row; justify-content: flex-start;
    height: 44px; padding: 0 12px; border-radius: 14px; font-size: 15px; gap: 10px;
  }
  .menu__item.is-active { background: var(--accent-soft); }
  .screens { flex: 1; padding: 0; }
}

/* ===== 6. ТЕКСТ ===== */
.title { margin: 0; font-size: 26px; font-weight: 800; line-height: 1.2; }
.subtitle { margin: 6px 0 0; font-size: 18px; font-weight: 800; }
.muted { color: var(--muted); font-size: 14px; margin: 0; }
.small { font-size: 13px; }
.label {
  font-size: 13px; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: .06em;
}
.hint {
  margin: 0; padding: 8px 12px; border-radius: 12px;
  background: var(--accent-soft); color: var(--accent); font-size: 13px; font-weight: 700;
}
.good { color: var(--good); }
.warn { color: var(--warn); }
.bad { color: var(--bad); }
.error { color: var(--bad); font-size: 14px; margin: 0; }

/* ===== 7. ШАПКА ЭКРАНА ===== */
.top { display: flex; align-items: center; gap: 12px; }
.top__text { flex: 1; min-width: 0; }
.icon-btn {
  width: 44px; height: 44px; border-radius: 14px; flex-shrink: 0;
  background: var(--card);
  display: flex; align-items: center; justify-content: center;
}
.logo-icon {
  width: 40px; height: 40px; border-radius: 12px;
  background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
}
.logo-icon--big { width: 72px; height: 72px; border-radius: 22px; }
.logo-icon--big svg { width: 36px; height: 36px; }

/* ===== 8. ПЛАШКИ ===== */
.hero, .panel, .banner, .deck {
  background: var(--card); border-radius: var(--radius);
  padding: 16px; text-align: left; width: 100%;
}
.hero { display: flex; flex-direction: column; gap: 10px; }
.hero__title { font-size: 20px; font-weight: 800; }
.panel { display: flex; flex-direction: column; gap: 12px; }

.banner { display: flex; align-items: center; gap: 12px; border-radius: 20px; }
.banner b { display: block; }
.banner__icon {
  width: 44px; height: 44px; border-radius: 14px; flex-shrink: 0;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
}
.banner__icon--warn { background: var(--warn-soft); color: var(--warn); }

.progress { display: block; height: 8px; border-radius: 999px; background: var(--line); overflow: hidden; }
.progress__bar { display: block; height: 100%; background: var(--accent); border-radius: 999px; transition: width .3s; }
.progress-row { display: flex; flex-direction: column; gap: 6px; }
.progress-row .row { min-height: 0; }

/* Списки колод, тестов, учеников */
.deck-list { display: flex; flex-direction: column; gap: 10px; }
.deck { display: flex; align-items: center; gap: 12px; border-radius: 18px; padding: 12px 14px; }
.deck > svg { color: var(--muted); }
.deck__badge {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800;
  background: var(--accent-soft); color: var(--accent);
}
.deck__badge--good { background: var(--good-soft); color: var(--good); }
.deck__body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.deck__name { font-size: 16px; font-weight: 700; }
.deck .progress { height: 6px; margin-top: 2px; }
.deck .action { flex-shrink: 0; }

/* Быстрые действия на главной */
.quick { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.quick__item {
  background: var(--card); border-radius: 20px; padding: 14px 8px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 700;
}
.quick__icon {
  width: 44px; height: 44px; border-radius: 14px;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
}

/* Поиск и темы */
.search {
  display: flex; align-items: center; gap: 10px;
  height: 48px; padding: 0 14px; background: var(--card); border-radius: 16px;
  color: var(--muted);
}
.search input { border: none; outline: none; background: none; flex: 1; min-width: 0; font-size: 15px; color: var(--text); }
.chips { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
.chip {
  flex-shrink: 0; height: 36px; padding: 0 14px; border-radius: 999px;
  background: var(--card); font-size: 14px; font-weight: 600;
}
.chip.is-active { background: var(--text); color: var(--bg); font-weight: 700; }

/* ===== 9. КАРТОЧКА ВОПРОС/ОТВЕТ ===== */
.flashcard {
  min-height: 320px;
  background: var(--card); border-radius: 28px; padding: 28px 22px;
  display: flex; flex-direction: column; justify-content: center; gap: 16px;
  text-align: left;
  border: 2px solid transparent;
  transition: border-color .2s;
}
.flashcard:disabled { opacity: 1; }
.flashcard.is-answer { border-color: var(--accent); }
.flashcard__text { font-size: 24px; line-height: 1.25; font-weight: 800; }

/* ===== 10. КНОПКИ ===== */
.actions { display: flex; flex-direction: column; gap: 10px; }
.actions--two { display: grid; grid-template-columns: 1fr 1fr; }
.actions--three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.actions--three .btn { font-size: 14px; padding: 0 4px; }
.action { display: flex; flex-direction: column; gap: 8px; }
.btn {
  min-height: 54px; border-radius: 18px; padding: 0 16px; width: 100%;
  font-size: 16px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.btn--small { min-height: 44px; font-size: 14px; border-radius: 14px; width: auto; }
.btn--main { background: var(--accent); color: #fff; }
.btn--light { background: var(--card); }
.btn--good { background: var(--good-soft); color: var(--good); }
.btn--warn { background: var(--warn-soft); color: var(--warn); }
.btn--bad { background: var(--bad-soft); color: var(--bad); }
.btn--danger { background: none; color: var(--bad); min-height: 44px; }
.btn:active:not(:disabled) { transform: scale(.98); }

/* ===== 11. ТЕСТЫ И ДУЭЛИ ===== */
.question { margin: 0; font-size: 22px; line-height: 1.3; font-weight: 800; }
.options { display: flex; flex-direction: column; gap: 10px; }
.option {
  min-height: 56px; padding: 12px 16px; border-radius: 16px;
  background: var(--card); border: 2px solid var(--line);
  text-align: left; font-size: 16px; font-weight: 600;
}
.option:disabled { opacity: 1; }
.option.is-right { border-color: var(--good); background: var(--good-soft); color: var(--good); }
.option.is-wrong { border-color: var(--bad); background: var(--bad-soft); color: var(--bad); }
.score { display: flex; gap: 12px; font-weight: 800; }

.review {
  background: var(--card); border-radius: 18px; padding: 14px 16px;
  display: flex; flex-direction: column; gap: 6px;
  border-left: 0; font-size: 15px;
}
.review--wrong { box-shadow: inset 0 0 0 2px var(--bad-soft); }

.scoreboard { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.player {
  background: var(--card); border-radius: 18px; padding: 12px 14px;
  display: flex; flex-direction: column; gap: 6px;
}
.player.is-me { box-shadow: inset 0 0 0 2px var(--accent); }
.player__name { font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.player__score { font-size: 28px; font-weight: 800; }
.waiting { align-items: center; text-align: center; }
.duel-score { margin: 0; font-size: 44px; font-weight: 800; }
.result--win { box-shadow: inset 0 0 0 2px var(--good); }
.result--win .title { color: var(--good); }
.result--lose .title { color: var(--bad); }

/* ===== 12. ИТОГ ===== */
.result {
  background: var(--card); border-radius: 28px; padding: 28px 20px;
  display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center;
}
.ring {
  --pct: 0;
  width: 150px; height: 150px; border-radius: 50%;
  background: conic-gradient(var(--accent) calc(var(--pct) * 1%), var(--line) 0);
  display: flex; align-items: center; justify-content: center;
}
.ring__inner {
  width: 126px; height: 126px; border-radius: 50%;
  background: var(--card);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.ring b { font-size: 34px; font-weight: 800; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); gap: 10px; }
.stat {
  background: var(--card); border-radius: 18px; padding: 14px 8px;
  display: flex; flex-direction: column; align-items: center; gap: 4px; text-align: center;
}
.stat b { font-size: 22px; font-weight: 800; }
.stat .muted { font-size: 12px; }

/* ===== 13. ФОРМЫ И КОДЫ ===== */
.input {
  height: 54px; border-radius: 16px; padding: 0 16px; width: 100%;
  border: 2px solid var(--line); background: var(--bg);
  font-size: 17px; font-weight: 600;
}
.input--code { font-size: 22px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.input:focus { outline: none; border-color: var(--accent); }
.code-box { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.code-box__code { font-size: 34px; font-weight: 800; letter-spacing: .14em; color: var(--accent); }
.waiting .code-box { align-items: center; }
.code-chip {
  padding: 6px 10px; border-radius: 10px; background: var(--bg);
  font-size: 13px; font-weight: 800; letter-spacing: .08em;
}

/* ===== 14. РОЛЬ, ПРИВЕТСТВИЕ, ОШИБКИ ВХОДА ===== */
.welcome, .fatal {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  text-align: center; padding: 24px 8px 8px;
}
.fatal { padding-top: 15vh; }
.role-card {
  display: flex; align-items: center; gap: 14px; width: 100%;
  background: var(--card); border-radius: var(--radius); padding: 18px 16px;
  text-align: left; border: 2px solid transparent;
}
.role-card b { display: block; font-size: 17px; margin-bottom: 2px; }
.role-card[aria-pressed="true"] { border-color: var(--accent); }
.role-card__icon {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
}

/* ===== 15. ПРОФИЛЬ И УЧЕНИКИ ===== */
.profile { flex-direction: row; align-items: center; gap: 14px; }
.avatar {
  width: 64px; height: 64px; border-radius: 50%; flex-shrink: 0;
  background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 800;
}
.avatar--small { width: 40px; height: 40px; font-size: 16px; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 44px; font-weight: 600; }
.row--link { width: 100%; text-align: left; }
.members { gap: 8px; }
.member { display: flex; align-items: center; gap: 12px; font-weight: 600; }
.member.is-me { color: var(--accent); }
.hard-card { display: flex; flex-direction: column; gap: 2px; padding: 4px 0; font-weight: 600; }

.switch {
  width: 52px; height: 32px; border-radius: 999px; padding: 3px; flex-shrink: 0;
  background: var(--line); display: flex; transition: background .2s;
}
.switch span { width: 26px; height: 26px; border-radius: 50%; background: #fff; transition: transform .2s; }
.switch[aria-checked="true"] { background: var(--accent); }
.switch[aria-checked="true"] span { transform: translateX(20px); }

/* ===== 16. СОСТОЯНИЯ ===== */
.demo-note {
  margin: 0; align-self: flex-start;
  padding: 6px 12px; border-radius: 999px;
  background: var(--warn-soft); color: var(--warn);
  font-size: 13px; font-weight: 700;
}
.state {
  background: var(--card); border-radius: 18px; padding: 16px;
  display: flex; flex-direction: column; align-items: flex-start; gap: 10px;
}
.state--loading { flex-direction: row; align-items: center; }
.spinner {
  width: 22px; height: 22px; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 3s; } }

.toast {
  position: fixed; left: 50%; bottom: calc(88px + env(safe-area-inset-bottom));
  transform: translateX(-50%); z-index: 20;
  max-width: calc(100% - 32px);
  padding: 12px 18px; border-radius: 14px;
  background: var(--text); color: var(--bg); font-size: 14px; font-weight: 700;
}

button:focus-visible, input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }