/* ============================================================
   ADAPTIVE.CSS — Адаптивная сетка, планшетная/мобильная верстка
   Gramaton.pro — Личный кабинет
   ============================================================ */

/* ---------- БАЗОВАЯ СЕТКА (Desktop first) ---------- */
.lk-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 64px 1fr;
  gap: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: #000000;
  transition: grid-template-columns 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Шапка (топбар) */
.lk-topbar {
  grid-column: 1 / -1;
  grid-row: 1 / 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 64px;
  background: rgba(10, 5, 22, 0.8);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-bottom: 1px solid rgba(122, 34, 166, 0.3);
  z-index: 100;
  position: sticky;
  top: 0;
}

/* Сайдбар (десктоп) */
.lk-sidebar {
  grid-column: 1 / 2;
  grid-row: 2 / -1;
  background: rgba(10, 5, 22, 0.7);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-right: 1px solid rgba(122, 34, 166, 0.4);
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 90;
  transition: width 0.35s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Контентная область — 3-оконная структура */
.lk-main {
  grid-column: 2 / 3;
  grid-row: 2 / -1;
  display: grid;
  grid-template-columns: 320px 1fr;
  grid-template-rows: 1fr auto;
  overflow: hidden;
  position: relative;
  background: radial-gradient(ellipse at 20% 50%, rgba(80, 10, 150, 0.08) 0%, transparent 70%),
              radial-gradient(ellipse at 80% 20%, rgba(0, 163, 255, 0.05) 0%, transparent 60%),
              #000000;
}

/* Окно 1 — Список чатов/контактов */
.lk-contacts {
  grid-column: 1 / 2;
  grid-row: 1 / -1;
  border-right: 1px solid rgba(122, 34, 166, 0.2);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* Окно 2 — Зона сообщений */
.lk-chat {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* Окно 3 — Зона ввода */
.lk-input {
  grid-column: 2 / 3;
  grid-row: 2 / 3;
  border-top: 1px solid rgba(122, 34, 166, 0.2);
  padding: 12px 16px;
  background: rgba(10, 5, 22, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* ---------- Планшет: md (768px – 1024px) ---------- */
@media (max-width: 1024px) {
  .lk-grid {
    grid-template-columns: 72px 1fr;
  }

  .lk-sidebar {
    width: 72px;
    padding: 16px 0;
    align-items: center;
  }

  .sidebar-label {
    display: none;
  }

  .sidebar-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    transition: all 0.2s ease;
  }

  .lk-contacts {
    grid-column: 1 / 2;
  }

  .lk-main {
    grid-template-columns: 280px 1fr;
  }
}

/* ---------- Мобильные: sm (< 768px) ---------- */
@media (max-width: 767px) {
  .lk-grid {
    grid-template-columns: 1fr;
    grid-template-rows: 56px 1fr;
  }

  .lk-topbar {
    height: 56px;
    padding: 0 12px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }

  /* Сайдбар скрыт — превращается в Drawer */
  .lk-sidebar {
    display: none;
  }

  /* Мобильный Drawer (управляется JS) */
  .lk-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 85vw;
    max-width: 360px;
    height: 100vh;
    height: 100dvh;
    z-index: 200;
    background: rgba(10, 5, 22, 0.7);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-right: 1px solid rgba(122, 34, 166, 0.4);
    transform: translate3d(-100%, 0, 0);
    will-change: transform, opacity;
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    display: flex;
    flex-direction: column;
    padding: 16px 0;
    overflow-y: auto;
  }

  .lk-drawer.open {
    transform: translate3d(0, 0, 0);
  }

  /* Бэкдроп (затемнение фона) */
  .lk-drawer-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 199;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s cubic-bezier(0.22, 1, 0.36, 1),
                visibility 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: opacity;
  }

  .lk-drawer-backdrop.active {
    opacity: 1;
    visibility: visible;
  }

  /* Одноконная структура мессенджера */
  .lk-main {
    grid-column: 1 / -1;
    grid-row: 2 / -1;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
  }

  .lk-contacts {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
    border-right: none;
  }

  .lk-chat {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
    display: none;
  }

  .lk-chat.active {
    display: flex;
  }

  .lk-input {
    grid-column: 1 / 2;
    grid-row: 2 / 3;
    display: none;
  }

  .lk-input.active {
    display: block;
  }

  /* Параллакс-эффект при открытом Drawer */
  .lk-grid.drawer-open .lk-main {
    transform: scale(0.96) translate3d(85%, 0, 0);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
  }

  .lk-grid.drawer-open .lk-topbar {
    transform: scale(0.96) translate3d(85%, 0, 0);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
  }

  /* Бургер-иконка */
  .burger-btn {
    width: 40px;
    height: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 8px;
    z-index: 210;
    position: relative;
  }

  .burger-line {
    width: 24px;
    height: 2px;
    background: linear-gradient(135deg, #7A22A6, #3B1154);
    border-radius: 2px;
    transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    transform-origin: center;
  }

  .burger-btn.active .burger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .burger-btn.active .burger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }

  .burger-btn.active .burger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Свайп-зона (30px от левого края) */
  .swipe-zone {
    position: fixed;
    top: 0;
    left: 0;
    width: 30px;
    height: 100%;
    z-index: 150;
    touch-action: pan-y;
  }

  /* Stagger-появление пунктов меню */
  .drawer-item {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    cursor: pointer;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
  }

  .drawer-item:hover,
  .drawer-item:active {
    background: rgba(122, 34, 166, 0.15);
    color: #fff;
  }

  .drawer-item .drawer-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    flex-shrink: 0;
  }

  .drawer-item .drawer-icon svg {
    width: 20px;
    height: 20px;
  }

  .lk-drawer.open .drawer-item {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ---------- Очень маленькие экраны (< 375px) ---------- */
@media (max-width: 374px) {
  .lk-drawer {
    width: 100vw;
  }

  .lk-grid.drawer-open .lk-main,
  .lk-grid.drawer-open .lk-topbar {
    transform: scale(0.96) translate3d(100%, 0, 0);
  }

  .lk-input {
    padding: 8px 12px;
  }
}

/* ---------- Планшетная версия сайдбара (показываем лейблы при ховере) ---------- */
@media (min-width: 768px) and (max-width: 1024px) {
  .sidebar-item {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 0;
    cursor: pointer;
    transition: all 0.2s ease;
  }

  .sidebar-item:hover .sidebar-label-tooltip {
    display: block;
  }

  .sidebar-label-tooltip {
    display: none;
    position: absolute;
    left: 60px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(10, 5, 22, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(122, 34, 166, 0.4);
    padding: 6px 12px;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    color: #fff;
    white-space: nowrap;
    z-index: 100;
    pointer-events: none;
  }
}

/* ---------- Высокие DPI экраны (Retina) ---------- */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .lk-grid {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}

/* ---------- prefers-reduced-motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .lk-grid,
  .lk-sidebar,
  .lk-drawer,
  .lk-drawer-backdrop,
  .lk-main,
  .lk-topbar,
  .burger-line,
  .drawer-item {
    transition: none !important;
    animation: none !important;
  }
}