/* ============================================================
   Мозговорот — дизайн-система
   Палитра: navy #003366, secondary #0055A4, accent #4CAF50,
   warning #FF8C00 (только «осталось 5 минут до дедлайна»)
   Светлая тема: фон #FFFFFF, панели #E8F4FC
   Тёмная тема: фон #0B1A2B
   ============================================================ */

:root {
  --navy: #003366;
  --navy-2: #0055A4;
  --green: #4CAF50;
  --green-dark: #3d8b40;
  --warning: #FF8C00;

  --bg: #FFFFFF;
  --panel: #E8F4FC;
  --panel-2: #F5FAFE;
  --text: #16283A;
  --text-2: #4A6076;
  --text-inv: #FFFFFF;
  --border: #C9DCEC;
  --danger: #C62828;
  --danger-bg: #FDECEA;
  --shadow: 0 1px 3px rgba(0, 51, 102, 0.10), 0 4px 16px rgba(0, 51, 102, 0.06);
  --radius: 14px;
  --focus: 0 0 0 3px rgba(0, 85, 164, 0.35);
}

[data-theme="dark"] {
  --bg: #0B1A2B;
  --panel: #12293F;
  --panel-2: #0F2236;
  --text: #EAF2F9;
  --text-2: #A9C0D4;
  --text-inv: #FFFFFF;
  --border: #24445F;
  --danger: #FF8A80;
  --danger-bg: #2A1518;
  --navy: #7FB2E5;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 4px 16px rgba(0, 0, 0, 0.3);
  --focus: 0 0 0 3px rgba(127, 178, 229, 0.45);
}

/* ---------- Сброс и база ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "Inter", "Golos Text", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  min-height: 100dvh;
  transition: background 0.25s, color 0.25s;
}
img { max-width: 100%; height: auto; display: block; }
h1 { font-size: 1.5rem; line-height: 1.25; margin: 0 0 16px; font-weight: 800; }
h2 { font-size: 1.15rem; margin: 0 0 12px; font-weight: 700; }
h3 { font-size: 1rem; margin: 0 0 8px; font-weight: 700; }
p { margin: 0 0 12px; }
a { color: var(--navy-2); text-decoration: none; }
[data-theme="dark"] a { color: #7FB2E5; }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 6px; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); overflow: hidden; white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy-2);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Topbar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  padding-top: calc(10px + env(safe-area-inset-top));
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.topbar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  font-size: 1.05rem;
  min-height: 44px;
}
.topbar__logo { width: 32px; height: 32px; }
.topbar__logo--dark { display: none; }
[data-theme="dark"] .topbar__logo--light { display: none; }
[data-theme="dark"] .topbar__logo--dark { display: block; }
.topbar__nav { display: flex; align-items: center; gap: 6px; }
.topbar__link {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  color: var(--text-2);
}
.topbar__link:hover { background: var(--panel); color: var(--text); }

.icon-btn {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border: none;
  border-radius: 12px;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.icon-btn:hover { background: var(--panel); color: var(--text); }
.icon-btn:active { transform: scale(0.96); }

.icon--moon { display: none; }
[data-theme="dark"] .icon--sun { display: none; }
[data-theme="dark"] .icon--moon { display: block; }

/* ---------- Layout ---------- */
.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 20px 16px calc(40px + env(safe-area-inset-bottom));
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

/* ---------- Кнопки ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 22px;
  border: 2px solid transparent;
  border-radius: 12px;
  font: inherit;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn--primary { background: var(--navy-2); color: #fff; }
.btn--primary:hover:not(:disabled) { background: #00478f; }
.btn--secondary {
  background: transparent;
  color: var(--navy-2);
  border-color: var(--navy-2);
}
.btn--secondary:hover:not(:disabled) { background: var(--panel); }
.btn--ghost { background: transparent; color: var(--text-2); border-color: var(--border); }
.btn--ghost:hover:not(:disabled) { background: var(--panel); color: var(--text); }
.btn--danger { background: var(--danger); color: #fff; }
.btn--danger:hover:not(:disabled) { filter: brightness(0.92); }
.btn--lg { width: 100%; min-height: 54px; font-size: 1.05rem; }
.btn--sm { min-height: 40px; padding: 8px 14px; font-size: 0.9rem; }

/* ---------- Поля ---------- */
.field { display: block; margin-bottom: 16px; }
.field__label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--text-2);
}
.field__input {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.15s;
}
.field__input:focus { outline: none; border-color: var(--navy-2); box-shadow: var(--focus); }
.field__input::placeholder { color: var(--text-2); opacity: 0.7; }

.form-error {
  color: var(--danger);
  font-weight: 600;
  font-size: 0.9rem;
  background: var(--danger-bg);
  border-radius: 10px;
  padding: 10px 14px;
  margin: 0 0 12px;
}

/* ---------- Auth ---------- */
.auth { display: grid; place-items: center; min-height: calc(100dvh - 140px); }
.auth__card { width: 100%; max-width: 420px; text-align: center; }
.auth__logo { display: grid; place-items: center; margin-bottom: 12px; }
.auth__title { font-size: 1.4rem; margin-bottom: 8px; }
.auth__text { color: var(--text-2); margin-bottom: 20px; }
.auth__img { margin: 0 auto 16px; border-radius: 12px; }
.auth__switch { margin-top: 18px; color: var(--text-2); }

/* ---------- Home ---------- */
.home__head { margin-bottom: 16px; }
.home__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}
@media (max-width: 420px) { .home__actions { grid-template-columns: 1fr; } }

.groups { display: grid; gap: 12px; }
.group-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text);
  transition: border-color 0.15s, transform 0.1s;
}
.group-card:hover { border-color: var(--navy-2); }
.group-card:active { transform: scale(0.99); }
.group-card__name { font-weight: 700; font-size: 1.05rem; }
.group-card__meta { color: var(--text-2); font-size: 0.85rem; margin-top: 2px; }
.group-card__arrow { color: var(--text-2); flex-shrink: 0; }

.skeleton {
  color: var(--text-2);
  text-align: center;
  padding: 32px;
}

/* ---------- Модалки ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: end center;
  background: rgba(8, 24, 40, 0.55);
  padding: 16px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
}
@media (min-width: 560px) { .modal-backdrop { place-items: center; } }
.modal { width: 100%; max-width: 420px; }
.modal__btns {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 8px;
}

/* ---------- Группа: шапка и вкладки ---------- */
.group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.group__head h1 { margin: 0; }
.group__invite {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-2);
  background: var(--panel-2);
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 6px 10px;
}
.group__invite code {
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text);
}

.tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-bottom: 2px solid var(--border);
  margin-bottom: 18px;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tabs__tab {
  appearance: none;
  border: none;
  background: transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-2);
  padding: 12px 16px;
  min-height: 48px;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
}
.tabs__tab:hover { color: var(--text); }
.tabs__tab.is-active { color: var(--navy-2); border-bottom-color: var(--navy-2); }
[data-theme="dark"] .tabs__tab.is-active { color: #7FB2E5; border-bottom-color: #7FB2E5; }

.tab-panel { display: none; }
.tab-panel.is-active { display: block; animation: fadein 0.2s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ---------- Карточка задачи ---------- */
.task-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}
.badge--navy { background: var(--navy-2); color: #fff; }
[data-theme="dark"] .badge--navy { background: #1B3A5C; color: #BBD7F2; }

.task-card__timer {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-2);
  font-size: 0.95rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--panel-2);
  border: 1px solid var(--border);
}
.task-card__timer.is-warning {
  color: var(--warning);
  border-color: var(--warning);
  background: transparent;
  animation: pulse 1.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 140, 0, 0.35); }
  50% { box-shadow: 0 0 0 6px rgba(255, 140, 0, 0); }
}

.task-card__text {
  font-size: 1.08rem;
  line-height: 1.6;
  margin-bottom: 20px;
  white-space: pre-line;
}

.answer-saved, .answer-deadline {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 0.95rem;
}
.answer-saved {
  background: rgba(76, 175, 80, 0.12);
  color: var(--green-dark);
  border: 1px solid rgba(76, 175, 80, 0.4);
}
[data-theme="dark"] .answer-saved { color: #8FD694; }
.answer-deadline {
  background: var(--panel-2);
  color: var(--text-2);
  border: 1px solid var(--border);
}
.answer-saved svg, .answer-deadline svg { flex-shrink: 0; }

/* ---------- Результаты ---------- */
.task-card__results { border-top: 2px solid var(--border); margin-top: 20px; padding-top: 20px; }
.task-card__results h2 { margin-bottom: 8px; }
#results-answered { color: var(--text-2); margin-bottom: 14px; }

.winners { list-style: none; margin: 0 0 18px; padding: 0; display: grid; gap: 8px; }
.winners li {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 600;
}
.winners__medal { font-size: 1.2rem; }
.winners__points { margin-left: auto; font-weight: 800; color: var(--navy-2); font-variant-numeric: tabular-nums; }
[data-theme="dark"] .winners__points { color: #7FB2E5; }
.winners__empty { color: var(--text-2); font-weight: 400; padding: 10px 0; }

.reveal {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-left: 4px solid var(--green);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 18px;
}
.reveal__answer { font-size: 1.15rem; font-weight: 800; color: var(--text); }
.reveal__explanation { color: var(--text-2); white-space: pre-line; margin: 8px 0 0; }

.rate-box { margin-top: 4px; }
#rate-prompt { font-weight: 600; margin-bottom: 8px; }
.stars { display: flex; gap: 6px; }
.stars__btn {
  appearance: none;
  border: 2px solid var(--border);
  background: var(--panel-2);
  border-radius: 10px;
  width: 52px; height: 52px;
  font-size: 1.3rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  color: var(--text-2);
  transition: all 0.12s;
  -webkit-tap-highlight-color: transparent;
}
.stars__btn:hover { border-color: var(--navy-2); transform: scale(1.06); }
.stars__btn.is-selected { background: var(--navy-2); border-color: var(--navy-2); color: #fff; }
#rate-done { color: var(--green-dark); font-weight: 600; margin: 10px 0 0; }
[data-theme="dark"] #rate-done { color: #8FD694; }
#rate-closed { color: var(--text-2); margin: 8px 0 0; }

/* ---------- Пустое состояние ---------- */
.empty {
  text-align: center;
  color: var(--text-2);
  padding: 24px 16px;
  background: var(--panel);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}
.empty img { margin: 0 auto 14px; opacity: 0.85; }

/* ---------- Лидеры ---------- */
.lb-switch {
  display: inline-flex;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 3px;
  margin-bottom: 14px;
}
.lb-switch__btn {
  appearance: none;
  border: none;
  background: transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-2);
  padding: 8px 18px;
  min-height: 40px;
  border-radius: 8px;
  cursor: pointer;
}
.lb-switch__btn.is-active { background: var(--navy-2); color: #fff; }
[data-theme="dark"] .lb-switch__btn.is-active { background: #1B3A5C; color: #BBD7F2; }

.lb { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.lb__row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
}
.lb__rank {
  width: 30px; height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--border);
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--text);
  flex-shrink: 0;
}
.lb__row--1 .lb__rank { background: #FFD700; color: #5c4a00; }
.lb__row--2 .lb__rank { background: #C0C0C0; color: #3a3a3a; }
.lb__row--3 .lb__rank { background: #CD7F32; color: #fff; }
.lb__login { font-weight: 600; overflow: hidden; text-overflow: ellipsis; }
.lb__points { margin-left: auto; font-weight: 800; color: var(--navy-2); font-variant-numeric: tabular-nums; }
[data-theme="dark"] .lb__points { color: #7FB2E5; }
.lb__empty { color: var(--text-2); text-align: center; padding: 20px 0; }

/* ---------- Участники ---------- */
.members { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.members__row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
}
.members__avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--navy-2);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1rem;
  flex-shrink: 0;
}
.members__login { font-weight: 600; }
.members__meta { color: var(--text-2); font-size: 0.82rem; }
.members__role {
  margin-left: auto;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--green-dark);
  background: rgba(76, 175, 80, 0.14);
  padding: 4px 10px;
  border-radius: 999px;
}
[data-theme="dark"] .members__role { color: #8FD694; }
.members__actions { margin-left: auto; display: flex; gap: 6px; }
.members__actions .members__role { margin-left: 0; }
.members__btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: 8px;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 12px;
  min-height: 36px;
  cursor: pointer;
  color: var(--text-2);
}
.members__btn:hover { border-color: var(--navy-2); color: var(--text); }
.members__btn--danger { color: var(--danger); border-color: var(--danger); }
.members__btn--danger:hover { background: var(--danger-bg); }

/* ---------- Админ ---------- */
.admin-panel h2 { margin-top: 22px; }
.admin-panel h2:first-child { margin-top: 0; }
.admin-panel__form { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; }
.admin-panel__form .field { flex: 1 1 200px; margin-bottom: 0; }
.admin-panel__danger {
  border-top: 2px solid var(--danger);
  margin-top: 26px;
  padding-top: 18px;
}
.admin-panel__danger .btn { width: 100%; }

/* ---------- Профиль ---------- */
.profile { max-width: 480px; }
.profile .card { margin-bottom: 16px; }
.profile__login { color: var(--text-2); margin-bottom: 20px; font-weight: 600; }
.profile__push-status { color: var(--text-2); margin-bottom: 14px; }
.card--danger { border-color: var(--danger); }
.card--danger h2 { color: var(--danger); }

/* ---------- Тост ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 60;
  max-width: calc(100% - 32px);
  background: var(--navy);
  color: #fff;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 12px 20px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  animation: toast-in 0.2s ease;
}
[data-theme="dark"] .toast { background: #1B3A5C; color: #DCEAF7; }
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0); } }

/* ---------- A11y / reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}