/* «Устат» — «Виртуальный режим» лабораторий (assets/js/immersive.js) */

/* ---------- Кнопка входа ---------- */
.imv-enter-bar { display: flex; justify-content: flex-end; margin: -8px -6px 8px 0; }
.imv-enter {
  display: inline-flex; align-items: center; gap: 7px; min-height: 36px; padding: 6px 14px 6px 11px;
  border-radius: 999px; border: 1.5px solid var(--border); background: var(--surface-2); color: var(--text);
  font: 700 .86rem/1.1 var(--font); cursor: pointer; box-shadow: var(--shadow-sm); white-space: nowrap;
  transition: border-color var(--transition), color var(--transition), transform var(--transition), background var(--transition);
}
.imv-enter:hover { border-color: var(--primary); color: var(--primary-strong); transform: translateY(-1px); }
.imv-enter:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.imv-enter .imv-ico svg, .imv-ib svg { width: 18px; height: 18px; display: block; }
.imv-root .imv-enter, .imv-root .imv-enter-bar { display: none !important; }
@media (max-width: 380px) { .imv-enter { font-size: .8rem; padding: 6px 11px 6px 9px; } }

/* ---------- Страница во время режима ---------- */
html.imv-open, html.imv-open body { overflow: hidden !important; }
html.imv-open .imv-anc { transform: none !important; filter: none !important; animation: none !important; contain: none !important; will-change: auto !important; z-index: auto !important; }
html.imv-open .modal-backdrop { z-index: 1500; }
html.imv-open .toast { z-index: 1600; }

/* Корень: на весь экран поверх сайта */
.imv-root {
  position: fixed !important; inset: 0 !important; z-index: 1000 !important;
  display: block !important; margin: 0 !important; padding: 0 !important;
  width: auto !important; max-width: none !important; height: auto !important; min-height: 0 !important;
  border: 0 !important; border-radius: 0 !important; box-shadow: none !important;
  background: var(--bg) !important; overflow: hidden !important;
  --imv-gap: 10px; --imv-pw: 360px; --imv-sh: 42vh;
}
.imv-root .imv-path { display: contents !important; }
.imv-root .imv-hide { display: none !important; }

/* Сцена */
.imv-root .imv-stage {
  position: absolute !important; margin: 0 !important; box-sizing: border-box;
  /* сверху — полоса под кнопку «✕ Выйти», чтобы она не закрывала вкладки/фильтры сцены */
  top: calc(var(--imv-gap) + 50px); left: var(--imv-gap); right: var(--imv-gap); bottom: var(--imv-gap);
  width: auto !important; height: auto !important; min-height: 0 !important; max-height: none !important; max-width: none !important;
  display: flex !important; flex-direction: column; gap: 12px;
  overflow: auto !important; overscroll-behavior: contain;
  border-radius: 16px !important; box-shadow: var(--shadow) !important;
  container-type: size;
}
.imv-root .imv-stage > * { flex: none; }
.imv-root .imv-fillpath { display: flex !important; flex-direction: column !important; flex: 1 1 0 !important; min-height: 0 !important; height: auto !important; max-height: none !important; }
.imv-root .imv-fillpath > *:not(.imv-fill):not(.imv-fillpath) { flex: none; }
.imv-root .imv-fill { flex: 1 1 0 !important; min-height: 220px !important; min-height: max(220px, 58cqh) !important; height: auto !important; max-height: none !important; width: 100% !important; }

.imv-root[data-imv-dock="right"]:not(.imv-collapsed) .imv-stage { right: calc(var(--imv-pw) + var(--imv-gap) * 2); }
.imv-root[data-imv-dock="left"]:not(.imv-collapsed) .imv-stage { left: calc(var(--imv-pw) + var(--imv-gap) * 2); }
.imv-root[data-imv-dock="bottom"]:not(.imv-collapsed) .imv-stage { bottom: calc(var(--imv-sh) + var(--imv-gap) * 2); }
.imv-root[data-imv-dock="bottom"].imv-collapsed .imv-stage { bottom: calc(54px + var(--imv-gap) * 2); }
.imv-root[data-imv-dock="left"].imv-collapsed .imv-stage,
.imv-root[data-imv-dock="right"].imv-collapsed .imv-stage { top: calc(54px + var(--imv-gap) * 2); }

/* ---------- Плавающая панель ---------- */
.imv-panel {
  position: absolute; z-index: 20; display: flex; flex-direction: column; min-height: 0; box-sizing: border-box;
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.15); backdrop-filter: blur(14px) saturate(1.15);
  border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow-lg); color: var(--text);
  font-family: var(--font);
}
.imv-root[data-imv-dock="right"] .imv-panel { top: var(--imv-gap); right: var(--imv-gap); bottom: var(--imv-gap); width: var(--imv-pw); }
.imv-root[data-imv-dock="left"] .imv-panel { top: var(--imv-gap); left: var(--imv-gap); bottom: var(--imv-gap); width: var(--imv-pw); }
.imv-root[data-imv-dock="bottom"] .imv-panel { left: var(--imv-gap); right: var(--imv-gap); bottom: var(--imv-gap); height: var(--imv-sh); }
.imv-root[data-imv-dock="float"] .imv-panel { width: var(--imv-pw); height: min(72vh, 680px); max-height: calc(100% - 12px); }

/* Свёрнута: остаётся только заголовок */
.imv-root.imv-collapsed .imv-panel { height: auto !important; bottom: auto; }
.imv-root.imv-collapsed[data-imv-dock="bottom"] .imv-panel { top: auto; bottom: var(--imv-gap); }
.imv-root.imv-collapsed[data-imv-dock="left"] .imv-panel,
.imv-root.imv-collapsed[data-imv-dock="right"] .imv-panel { width: min(var(--imv-pw), calc(100% - var(--imv-gap) * 2)); }
.imv-root.imv-collapsed .imv-body, .imv-root.imv-collapsed .imv-sub, .imv-root.imv-collapsed .imv-rz { display: none !important; }
.imv-root.imv-collapsed .imv-col svg { transform: rotate(180deg); }
.imv-root[data-imv-dock="bottom"].imv-collapsed .imv-col svg { transform: rotate(180deg); }
.imv-root[data-imv-dock="bottom"]:not(.imv-collapsed) .imv-col svg { transform: none; }

.imv-head {
  display: flex; align-items: center; gap: 6px; padding: 7px 8px 7px 14px; min-height: 52px; box-sizing: border-box;
  border-bottom: 1px solid var(--border); flex: none; position: relative; user-select: none; -webkit-user-select: none; touch-action: none;
}
.imv-root.imv-collapsed .imv-head { border-bottom: 0; }
.imv-root[data-imv-dock="float"] .imv-head { cursor: move; }
.imv-root[data-imv-dock="bottom"]:not(.imv-collapsed) .imv-head { cursor: ns-resize; }
.imv-grip { display: none; position: absolute; top: 5px; left: 50%; width: 40px; height: 4px; margin-left: -20px; border-radius: 4px; background: var(--border); }
.imv-root[data-imv-dock="bottom"] .imv-grip { display: block; }
.imv-title { flex: 1 1 auto; min-width: 0; font-family: var(--font-display); font-size: .98rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.imv-tools { display: flex; align-items: center; gap: 2px; flex: none; }
.imv-ib {
  width: 34px; height: 34px; display: inline-grid; place-items: center; padding: 0; border-radius: 10px;
  border: 1px solid transparent; background: transparent; color: var(--text-muted); cursor: pointer;
}
.imv-ib:hover { background: var(--bg-alt); color: var(--text); }
.imv-ib.on { color: var(--primary-strong); background: var(--primary-soft); }
.imv-ib:focus-visible, .imv-exit:focus-visible { outline: 3px solid var(--primary); outline-offset: 1px; }
.imv-col svg { transition: transform .2s ease; transform: rotate(0); }
.imv-root:not(.imv-collapsed):not([data-imv-dock="bottom"]) .imv-col svg { transform: rotate(180deg); }
.imv-root.imv-collapsed:not([data-imv-dock="bottom"]) .imv-col svg { transform: none; }
.imv-exit {
  margin-left: 4px; display: inline-flex; align-items: center; gap: 5px; min-height: 34px; padding: 4px 12px; border-radius: 999px;
  border: 1.5px solid var(--red); background: var(--red-soft); color: var(--text); font: 800 .84rem var(--font); cursor: pointer; white-space: nowrap;
}
.imv-exit:hover { background: var(--red); color: #fff; }

.imv-exit { min-height: 38px; padding: 6px 14px; font-size: .9rem; box-shadow: var(--shadow-sm); }

/* Всегда видимая кнопка выхода поверх сцены (не зависит от состояния панели) */
.imv-fexit {
  position: absolute; z-index: 25; top: calc(var(--imv-gap) + 4px); left: var(--imv-gap);
  display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 6px 16px; border-radius: 999px;
  border: 2px solid var(--red); background: var(--surface); color: var(--text); font: 800 .95rem var(--font);
  box-shadow: var(--shadow-lg); cursor: pointer; white-space: nowrap;
}
.imv-fexit:hover { background: var(--red); color: #fff; }
.imv-fexit:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.imv-fexit kbd { font: 700 .72rem var(--font); padding: 1px 6px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg-alt); color: var(--text-muted); }
.imv-fexit:hover kbd { color: var(--text); }
.imv-root[data-imv-dock="left"] .imv-fexit { left: auto; right: var(--imv-gap); }
.imv-root.imv-collapsed[data-imv-dock="left"] .imv-fexit,
.imv-root.imv-collapsed[data-imv-dock="right"] .imv-fexit { top: calc(var(--imv-gap) + 7px); }

.imv-sub { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 8px 10px 8px 14px; flex: none; border-bottom: 1px solid var(--border); }
.imv-docks { display: flex; gap: 2px; margin-left: auto; flex: none; }
/* Список опытов — на всю ширину панели, кнопки раскладки переносятся ниже */
.imv-sw-wrap { display: flex; flex-direction: column; align-items: stretch; gap: 4px; flex: 1 1 100%; min-width: 0; }
.imv-sw-wrap[hidden] { display: none; }
.imv-sw-l { font-size: .8rem; font-weight: 700; color: var(--text-muted); flex: none; }
.imv-sw { width: 100%; max-width: 100%; min-width: 0; box-sizing: border-box; padding: 7px 30px 7px 10px; font-size: .92rem; white-space: normal; text-overflow: ellipsis; }

.imv-body { flex: 1 1 auto; min-height: 0; overflow: auto; overscroll-behavior: contain; padding: 12px 14px 14px; -webkit-overflow-scrolling: touch; }
.imv-body > .lab-panel { background: transparent !important; border: 0 !important; box-shadow: none !important; padding: 0 !important; margin: 0 !important; border-radius: 0 !important; }
.imv-body > .card { background: transparent !important; border: 0 !important; box-shadow: none !important; padding: 0 !important; border-radius: 0 !important; }
.imv-body > * + * { margin-top: 12px; }

/* Край для изменения ширины */
.imv-rz { position: absolute; top: 14px; bottom: 14px; width: 10px; cursor: ew-resize; touch-action: none; display: none; }
.imv-rz::after { content: ""; position: absolute; top: 50%; left: 3px; width: 4px; height: 42px; margin-top: -21px; border-radius: 4px; background: var(--border); opacity: 0; transition: opacity .2s; }
.imv-panel:hover .imv-rz::after { opacity: 1; }
.imv-root[data-imv-dock="right"] .imv-rz { display: block; left: -5px; }
.imv-root[data-imv-dock="left"] .imv-rz, .imv-root[data-imv-dock="float"] .imv-rz { display: block; right: -5px; }

/* ---------- Телефон: нижний лист ---------- */
@media (max-width: 699px) {
  .imv-root { --imv-gap: 6px; }
  .imv-root .imv-dockb { display: none; }
  .imv-root .imv-sub:has(.imv-sw-wrap[hidden]) { display: none; }
  .imv-root .imv-stage { border-radius: 12px !important; padding: 10px !important; }
  .imv-root .imv-fill { min-height: max(220px, 80cqh) !important; }
  .imv-root[data-imv-dock="bottom"] .imv-panel {
    left: 0; right: 0; bottom: 0; border-radius: 18px 18px 0 0; border-bottom: 0;
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
  .imv-root[data-imv-dock="bottom"]:not(.imv-collapsed) .imv-stage { bottom: calc(var(--imv-sh) + var(--imv-gap)); }
  .imv-root[data-imv-dock="bottom"].imv-collapsed .imv-stage { bottom: calc(54px + env(safe-area-inset-bottom, 0px) + var(--imv-gap)); }
  .imv-root.imv-collapsed[data-imv-dock="bottom"] .imv-panel { bottom: 0; }
  .imv-head { padding: 12px 6px 6px 12px; min-height: 54px; }
  .imv-exit { padding: 4px 10px; }
  .imv-root .imv-stage { top: calc(var(--imv-gap) + 46px); }
  .imv-fexit { top: calc(var(--imv-gap) + 2px); left: var(--imv-gap); min-height: 38px; padding: 5px 13px; font-size: .9rem; }
  .imv-fexit kbd { display: none; }
}
@media print { .imv-fexit { display: none !important; } }

@media (prefers-reduced-motion: reduce) { .imv-col svg, .imv-enter { transition: none; } }
@media print { .imv-enter-bar, .imv-enter { display: none !important; } }