/* ==========================================================================
   APPLE iOS 27 LIQUID GLASS (НАСТОЯЩАЯ SVG-ЛИНЗА КРОМКИ — КАК В /test-ostrov/)
   100% прозрачный центр + преломление и дисперсия только по краям капсулы.
   Для iPhone (iOS WebKit), где Apple блокирует url(#svg) внутри backdrop-filter,
   автоматически включается единый WebGL-шейдер зеркальной кромки (flow_ios_glass_lens.js),
   отражающий как живое <video>, так и весь интерфейс сайта с плавным переходом в центр.
   ========================================================================== */

/* 1. СТЕКЛЯННАЯ ОБОЛОЧКА ОСТРОВА (ТОЛЬКО НА МОБИЛЬНЫХ И ПЛАНШЕТАХ <= 768px) */
.flow-bottom-dock {
  position: fixed !important;
  bottom: calc(20px + env(safe-area-inset-bottom, 0px)) !important;
  left: 50% !important;
  transform: translateX(-50%) translateZ(0) !important;
  -webkit-transform: translateX(-50%) translateZ(0) !important;
  width: min(362px, calc(100vw - 28px)) !important;
  height: 74px !important;
  border-radius: 9999px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding: 0 16px !important;
  box-sizing: border-box !important;
  z-index: 9990 !important;
  overflow: hidden !important;
  isolation: isolate !important;

  /* КРИСТАЛЬНО ПРОЗРАЧНОЕ СТЕКЛО */
  background: linear-gradient(
    180deg, 
    rgba(255, 255, 255, 0.06) 0%, 
    rgba(30, 32, 36, 0.14) 100%
  ) !important;

  /* Настоящая SVG-линза преломления краёв из /test-ostrov/ (для Android / Desktop) */
  backdrop-filter: url(#ios27-crystal-lens) saturate(135%) contrast(106%) !important;
  -webkit-backdrop-filter: url(#ios27-crystal-lens) saturate(135%) contrast(106%) !important;

  /* Тонкая стеклянная грань и блик воды */
  border: none !important;
  box-shadow: 
    0 14px 35px rgba(0, 0, 0, 0.45),
    inset 0 1px 0.5px rgba(255, 255, 255, 0.55),
    inset 0 -1px 0.5px rgba(255, 255, 255, 0.30),
    inset 0 0 0 0.8px rgba(255, 255, 255, 0.22),
    inset 0 4px 12px rgba(255, 255, 255, 0.08) !important;
}

/* По умолчанию псевдоэлементы выключены */
.flow-bottom-dock::before,
.flow-bottom-dock::after {
  display: none !important;
  content: none !important;
}

/* Темная тема (Единая для всех платформ) */
html.dark-theme .flow-bottom-dock {
  background: linear-gradient(
    180deg, 
    rgba(255, 255, 255, 0.06) 0%, 
    rgba(30, 32, 36, 0.14) 100%
  ) !important;
  box-shadow: 
    0 14px 35px rgba(0, 0, 0, 0.65),
    inset 0 1px 0.5px rgba(255, 255, 255, 0.45),
    inset 0 -1px 0.5px rgba(255, 255, 255, 0.20),
    inset 0 0 0 0.8px rgba(255, 255, 255, 0.15),
    inset 0 4px 12px rgba(255, 255, 255, 0.05) !important;
}

/* ==========================================================================
   1b. ЗЕРКАЛЬНОЕ ОТРАЖЕНИЕ ПО КРОМКЕ ТОЛЬКО ДЛЯ iPHONE (iOS WebKit)
   Единый WebGL-шейдер кромки (для видео И интерфейса страницы) с плавным
   переходом в 100% прозрачный живой центр острова.
   ========================================================================== */
.flow-bottom-dock > canvas.flow-ios-glass-gl {
  display: none;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.12s ease;
}

@supports (-webkit-touch-callout: none) {
  .flow-feed-card, .flow-feed-card:nth-child(n+2) {
    content-visibility: visible !important;
    contain: layout style !important;
  }

  .flow-bottom-dock {
    padding: 0 16px !important;
    background: transparent !important;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
    box-shadow: 0 14px 35px rgba(0, 0, 0, 0.45) !important;
  }

  html.dark-theme .flow-bottom-dock {
    background: transparent !important;
    box-shadow: 0 14px 35px rgba(0, 0, 0, 0.65) !important;
  }

  .flow-bottom-dock > canvas.flow-ios-glass-gl {
    display: block;
  }

  .flow-bottom-dock > canvas.flow-ios-glass-gl.is-on {
    opacity: 1;
  }

  .flow-bottom-dock::after {
    content: "" !important;
    display: block !important;
    position: absolute !important;
    inset: 0 !important;
    border-radius: inherit !important;
    pointer-events: none !important;
    z-index: 2 !important;
    background: linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.04) 0%,
      rgba(30, 32, 36, 0.08) 100%
    ) !important;
    box-shadow:
      inset 0 1px 0.5px rgba(255, 255, 255, 0.55),
      inset 0 -1px 0.5px rgba(255, 255, 255, 0.30),
      inset 0 0 0 0.8px rgba(255, 255, 255, 0.22),
      inset 0 4px 12px rgba(255, 255, 255, 0.06) !important;
  }

  html.dark-theme .flow-bottom-dock::after {
    box-shadow:
      inset 0 1px 0.5px rgba(255, 255, 255, 0.45),
      inset 0 -1px 0.5px rgba(255, 255, 255, 0.20),
      inset 0 0 0 0.8px rgba(255, 255, 255, 0.15),
      inset 0 4px 12px rgba(255, 255, 255, 0.05) !important;
  }
}

html.ios-glass-active .flow-feed-card,
html.is-ios-device .flow-feed-card, .flow-feed-card:nth-child(n+2) {
  content-visibility: visible !important;
  contain: layout style !important;
}

html.ios-glass-active .flow-bottom-dock,
html.is-ios-device .flow-bottom-dock,
body.is-ios-device .flow-bottom-dock {
  padding: 0 16px !important;
  background: transparent !important;
  -webkit-backdrop-filter: none !important;
  backdrop-filter: none !important;
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.45) !important;
}

html.dark-theme.ios-glass-active .flow-bottom-dock,
html.dark-theme.is-ios-device .flow-bottom-dock,
html.dark-theme body.is-ios-device .flow-bottom-dock {
  background: transparent !important;
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.65) !important;
}

html.ios-glass-active .flow-bottom-dock > canvas.flow-ios-glass-gl,
html.is-ios-device .flow-bottom-dock > canvas.flow-ios-glass-gl,
body.is-ios-device .flow-bottom-dock > canvas.flow-ios-glass-gl {
  display: block;
}

html.ios-glass-active .flow-bottom-dock > canvas.flow-ios-glass-gl.is-on,
html.is-ios-device .flow-bottom-dock > canvas.flow-ios-glass-gl.is-on,
body.is-ios-device .flow-bottom-dock > canvas.flow-ios-glass-gl.is-on {
  opacity: 1;
}

html.ios-glass-active .flow-bottom-dock::after,
html.is-ios-device .flow-bottom-dock::after,
body.is-ios-device .flow-bottom-dock::after {
  content: "" !important;
  display: block !important;
  position: absolute !important;
  inset: 0 !important;
  border-radius: inherit !important;
  pointer-events: none !important;
  z-index: 2 !important;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.04) 0%,
    rgba(30, 32, 36, 0.08) 100%
  ) !important;
  box-shadow:
    inset 0 1px 0.5px rgba(255, 255, 255, 0.55),
    inset 0 -1px 0.5px rgba(255, 255, 255, 0.30),
    inset 0 0 0 0.8px rgba(255, 255, 255, 0.22),
    inset 0 4px 12px rgba(255, 255, 255, 0.06) !important;
}

html.dark-theme.ios-glass-active .flow-bottom-dock::after,
html.dark-theme.is-ios-device .flow-bottom-dock::after,
html.dark-theme body.is-ios-device .flow-bottom-dock::after {
  box-shadow:
    inset 0 1px 0.5px rgba(255, 255, 255, 0.45),
    inset 0 -1px 0.5px rgba(255, 255, 255, 0.20),
    inset 0 0 0 0.8px rgba(255, 255, 255, 0.15),
    inset 0 4px 12px rgba(255, 255, 255, 0.05) !important;
}

/* ==========================================================================
   2. НАВИГАЦИОННЫЕ ИКОНКИ И АКТИВНЫЕ ТАБЛЕТКИ (ПОВЕРХ СТЕКЛА)
   ========================================================================== */
.flow-bottom-dock > .flow-nav-item,
.flow-bottom-dock > button,
.flow-bottom-dock > a {
  position: relative !important;
  z-index: 10 !important;
  color: #ffffff !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  text-decoration: none !important;
  background: transparent !important;
  border: none !important;
  outline: none !important;
  cursor: pointer !important;
  padding: 0 !important;
  width: 52px !important;
  height: 52px !important;
  border-radius: 9999px !important;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1) !important;
  -webkit-tap-highlight-color: transparent !important;
}

.flow-bottom-dock > .flow-nav-item svg,
.flow-bottom-dock > button svg,
.flow-bottom-dock > a svg {
  width: 24px !important;
  height: 24px !important;
  color: #ffffff !important;
  stroke: #ffffff !important;
  z-index: 10 !important;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.5)) !important;
}

/* Активная таблетка вокруг выбранной иконки */
.flow-bottom-dock > .flow-nav-item.active,
.flow-bottom-dock > a.active,
.flow-bottom-dock > button.active {
  background: rgba(255, 255, 255, 0.24) !important;
  border-radius: 9999px !important;
  height: 52px !important;
  min-width: 72px !important;
  box-shadow: 
    inset 0 1px 0.5px rgba(255, 255, 255, 0.45),
    0 2px 8px rgba(0, 0, 0, 0.12) !important;
  backdrop-filter: blur(2px) !important;
  -webkit-backdrop-filter: blur(2px) !important;
}

.flow-bottom-dock > .flow-nav-item .flow-nav-avatar {
  width: 26px !important;
  height: 26px !important;
  border-radius: 50% !important;
  object-fit: cover !important;
  border: 1.5px solid rgba(255, 255, 255, 0.85) !important;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.5)) !important;
}

/* ==========================================================================
   3. НАСТРОЙКИ ДЛЯ ПК (DESKTOP SCREENS > 768px):
   На компьютерах вся навигация расположена в верхней шапке Flow.
   Нижний плавающий остров-док скрыт на ПК.
   ========================================================================== */
@media (min-width: 769px) {
  .flow-bottom-dock {
    display: none !important;
    visibility: hidden !important;
    pointer-events: none !important;
    opacity: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
  }
}