/* Навигация и прогресс чтения материалов «Лаборатории». */
.gelta-reader-bar,
.gelta-reader-nav,
.gelta-reader-mobile {
  box-sizing: border-box;
  font-family: var(--font-body, system-ui, sans-serif);
}

.gelta-reader-bar[hidden],
.gelta-reader-nav[hidden],
.gelta-reader-mobile[hidden] {
  display: none !important;
}

.gelta-reader-bar {
  position: fixed;
  top: var(--gelta-reader-top, 0px);
  right: 0;
  left: 0;
  z-index: 40;
  background: rgba(255, 255, 255, .97);
  color: #29252f;
  box-shadow: 0 2px 8px #0000000d;
  font-size: 13px;
  line-height: 1.4;
}

.gelta-reader-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  max-width: 900px;
  margin: 0 auto;
  padding: 10px 24px;
}

.gelta-reader-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gelta-reader-percent {
  flex-shrink: 0;
  color: var(--violet, #7828ff);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.gelta-reader-track {
  height: 3px;
  overflow: hidden;
  background: #eee;
}

.gelta-reader-fill {
  width: 0;
  height: 100%;
  background: var(--violet, #7828ff);
}

.gelta-reader-nav {
  position: fixed;
  top: var(--gelta-reader-offset, 140px);
  left: var(--gelta-reader-left, 16px);
  z-index: 20;
  width: 220px;
  max-height: calc(100vh - var(--gelta-reader-offset, 140px) - 24px);
  max-height: calc(100dvh - var(--gelta-reader-offset, 140px) - 24px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  color: #6b6690;
  font-size: 13px;
  line-height: 1.4;
}

.gelta-reader-title {
  display: block;
  margin: 0 0 8px 12px;
  color: #6b6690;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.gelta-reader-nav a {
  display: block;
  padding: 6px 10px;
  border-left: 2px solid #e4e1f5;
  color: inherit;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.gelta-reader-nav a:hover {
  color: var(--violet, #7828ff);
  background: var(--mist, #f2f1fa);
}

.gelta-reader-nav a[aria-current="location"] {
  border-left-color: var(--violet, #7828ff);
  color: var(--ink, #1f145d);
  font-weight: 600;
}

.gelta-reader-mobile {
  position: fixed;
  right: 16px;
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 45;
  max-width: calc(100vw - 32px);
  color: #29252f;
  font-size: 14px;
  line-height: 1.4;
}

.gelta-reader-mobile > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
  padding: 11px 16px;
  border-radius: 999px;
  background: #1d1d1f;
  color: #fff;
  box-shadow: 0 6px 20px #00000030;
  font-weight: 600;
  list-style: none;
  cursor: pointer;
}

.gelta-reader-mobile > summary::-webkit-details-marker {
  display: none;
}

.gelta-reader-mobile > summary::after {
  content: "⌃";
  flex-shrink: 0;
  font-size: 18px;
  line-height: 1;
}

.gelta-reader-mobile[open] > summary::after {
  transform: rotate(180deg);
}

.gelta-reader-mobile > nav {
  position: absolute;
  right: 0;
  bottom: calc(100% + 10px);
  width: min(360px, calc(100vw - 32px));
  max-height: min(65vh, calc(100vh - var(--gelta-reader-offset, 140px) - 90px));
  max-height: min(65dvh, calc(100dvh - var(--gelta-reader-offset, 140px) - 90px));
  padding: 12px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 1px solid #e4e1f5;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 8px 32px #1f145d26;
}

.gelta-reader-mobile > nav .gelta-reader-title {
  margin: 4px 8px 8px;
}

.gelta-reader-mobile > nav a {
  display: block;
  padding: 12px 8px;
  border-bottom: 1px solid #eeecf6;
  color: inherit;
  font-size: 14px;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.gelta-reader-mobile > nav a:last-child {
  border-bottom: 0;
}

.gelta-reader-mobile > nav a:hover,
.gelta-reader-mobile > nav a[aria-current="location"] {
  color: var(--violet, #7828ff);
  background: var(--mist, #f2f1fa);
}

.gelta-reader-mobile > nav a[aria-current="location"] {
  font-weight: 600;
}

.gelta-reader-nav a:focus-visible,
.gelta-reader-mobile a:focus-visible,
.gelta-reader-mobile > summary:focus-visible {
  outline: 2px solid var(--violet, #7828ff);
  outline-offset: -2px;
}

.gelta-reader-mobile > summary:focus-visible {
  outline: 3px solid var(--yellow, #fecb00);
  outline-offset: 3px;
}

.gelta-reader-content,
.gelta-reader-content [id] {
  scroll-margin-top: var(--gelta-reader-offset, 140px);
}

body.gelta-reader-enabled .rgs-side,
body.gelta-reader-enabled .rgs-fab,
body.gelta-reader-enabled .rgs-sheet,
body.gelta-reader-enabled .rgs-shade {
  display: none !important;
}

@media (max-width: 600px) {
  .gelta-reader-bar-inner {
    gap: 10px;
    padding: 9px 16px;
  }
}

@media print {
  .gelta-reader-bar,
  .gelta-reader-nav,
  .gelta-reader-mobile {
    display: none !important;
  }
}