/**
 * LabScope Mobile Shell — premium header, bottom sheet menu, bottom nav
 */

:root {
  --pp-shell-header-height: 68px;
  --pp-shell-header-compact: 56px;
  --pp-shell-sub-header-height: 44px;
  --pp-shell-padding-x: clamp(0.85rem, 3.5vw, 1.25rem);
  --pp-shell-action-gap: 0.5rem;
  --pp-shell-action-size: 48px;
  --pp-shell-bottom-nav-height: 72px;
  --pp-shell-sheet-radius: 20px;
  --pp-shell-ease: cubic-bezier(0.16, 1, 0.3, 1);
  --pp-shell-ease-spring: cubic-bezier(0.34, 1.45, 0.64, 1);
}

/* --- Shell header layout (mobile) --- */
@media (max-width: 899px) {
  .pp-header--shell > .pp-container,
  .pp-header--shell.pp-header--premium > .pp-container {
    width: 100%;
    max-width: none;
    padding-inline: var(--pp-shell-padding-x);
  }

  .pp-header--shell .pp-header__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 0.65rem;
    row-gap: 0;
    min-height: var(--pp-shell-header-height);
    width: 100%;
    flex-wrap: nowrap;
  }

  .pp-header--shell .pp-header__brand {
    flex-direction: row;
    align-items: center;
    min-width: 0;
    flex: 1 1 auto;
    overflow: visible;
  }

  .pp-header--shell .pp-shell-lang,
  .pp-header--shell .pp-shell-actions > .pp-theme-switcher,
  .pp-header--shell .pp-shell-actions > .pp-dark-toggle {
    display: none !important;
  }

  .pp-header--shell .pp-tagline {
    display: none;
  }

  .pp-header--shell .pp-nav--desktop {
    display: none !important;
  }

  .pp-header--shell .pp-shell-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--pp-shell-action-gap);
    margin-left: 0;
    flex-shrink: 0;
    flex-wrap: nowrap;
  }

  .pp-header--shell .pp-shell-lang .pp-lang-switcher {
    height: var(--pp-shell-action-size);
    min-height: var(--pp-shell-action-size);
  }

  .pp-header--shell .pp-shell-lang .pp-lang-switcher__item {
    min-width: 2.15rem;
    height: var(--pp-shell-action-size);
    min-height: var(--pp-shell-action-size);
    padding-inline: 0.5rem;
    font-size: 0.68rem;
  }

  .pp-header--shell.is-scrolled .pp-header__inner {
    min-height: var(--pp-shell-header-compact);
  }

  .pp-header--shell.is-scrolled .pp-logo__mark-svg {
    transform: scale(0.92);
  }

  .pp-header--shell.is-scrolled .pp-logo__wordmark {
    font-size: 1rem;
  }

  .pp-header--shell .pp-logo__desktop-lockup {
    display: none;
  }

  .pp-header--shell .pp-logo__mobile-lockup {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    min-width: 0;
  }

  .pp-header--shell .pp-logo__mark-svg {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    transition: transform 0.32s var(--pp-shell-ease);
  }

  .pp-header--shell .pp-logo__wordmark {
    font-family: var(--pp-font-heading);
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--pp-text);
    line-height: 1.05;
    white-space: nowrap;
    flex-shrink: 0;
    transition: font-size 0.32s var(--pp-shell-ease), opacity 0.32s var(--pp-shell-ease);
  }

  body.pp-shell-bottom-nav {
    padding-bottom: calc(var(--pp-shell-bottom-nav-height) + env(safe-area-inset-bottom, 0px));
  }

  body.pp-demo-research.pp-shell-bottom-nav {
    padding-bottom: calc(var(--pp-shell-bottom-nav-height) + env(safe-area-inset-bottom, 0px)) !important;
  }

  body.pp-shell-menu-open,
  html.pp-search-open,
  html.pp-search-open body {
    overflow: hidden;
    touch-action: none;
  }
}

@media (min-width: 900px) {
  .pp-header--shell .pp-logo__mobile-lockup {
    display: none;
  }

  .pp-header--shell .pp-logo__desktop-lockup--split {
    display: inline-flex !important;
  }

  .pp-header--shell .pp-logo__desktop-lockup:not(.pp-logo__desktop-lockup--split) {
    display: none;
  }

  .pp-header--shell .pp-nav-toggle {
    display: none;
  }

  .pp-mobile-sheet,
  .pp-bottom-nav {
    display: none !important;
  }

  .pp-header--shell .pp-header__progress {
    display: none;
  }
}

/* --- Premium header surface --- */
.pp-header--shell {
  position: sticky;
  top: 0;
  z-index: 140;
  padding-top: env(safe-area-inset-top, 0px);
  border-bottom: 1px solid color-mix(in srgb, var(--pp-primary) 10%, var(--pp-border));
  background: color-mix(in srgb, var(--pp-header-bg) 82%, transparent);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--pp-surface) 40%, transparent);
  transition:
    background 0.32s var(--pp-shell-ease),
    border-color 0.32s var(--pp-shell-ease),
    box-shadow 0.32s var(--pp-shell-ease),
    backdrop-filter 0.32s var(--pp-shell-ease);
}

.pp-header--shell.is-scrolled {
  background: color-mix(in srgb, var(--pp-header-bg) 94%, transparent);
  border-bottom-color: color-mix(in srgb, var(--pp-primary) 16%, var(--pp-border));
  box-shadow: 0 10px 32px color-mix(in srgb, var(--pp-dark) 8%, transparent);
  backdrop-filter: blur(22px) saturate(1.3);
  -webkit-backdrop-filter: blur(22px) saturate(1.3);
}

.pp-header--shell .pp-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--pp-primary), var(--pp-accent));
  opacity: 0.85;
  pointer-events: none;
  transition: transform 0.12s linear;
}

/* --- Shell action buttons --- */
.pp-shell-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--pp-shell-action-size);
  height: var(--pp-shell-action-size);
  min-width: var(--pp-shell-action-size);
  min-height: var(--pp-shell-action-size);
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--pp-primary) 12%, var(--pp-border));
  border-radius: 999px;
  background: color-mix(in srgb, var(--pp-surface) 92%, transparent);
  color: var(--pp-text);
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  transition:
    transform 0.22s var(--pp-shell-ease),
    border-color 0.22s var(--pp-shell-ease),
    background 0.22s var(--pp-shell-ease),
    box-shadow 0.22s var(--pp-shell-ease),
    color 0.22s var(--pp-shell-ease);
}

.pp-shell-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at center, color-mix(in srgb, var(--pp-accent) 24%, transparent), transparent 70%);
  opacity: 0;
  transform: scale(0.4);
  transition: opacity 0.28s ease, transform 0.28s var(--pp-shell-ease-spring);
  pointer-events: none;
}

.pp-shell-btn:active,
.pp-shell-btn.is-pressed {
  transform: scale(0.94);
}

.pp-shell-btn.is-pressed::after {
  opacity: 1;
  transform: scale(1.2);
}

.pp-shell-btn:focus-visible {
  outline: 2px solid var(--pp-accent);
  outline-offset: 2px;
}

.pp-header--shell .pp-dark-toggle {
  width: var(--pp-shell-action-size);
  height: var(--pp-shell-action-size);
  min-width: var(--pp-shell-action-size);
  min-height: var(--pp-shell-action-size);
  border-radius: 999px;
}

/* Hamburger */
.pp-nav-toggle__bars {
  display: grid;
  gap: 5px;
  width: 18px;
}

.pp-nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  box-shadow: none;
  transition:
    transform 0.28s var(--pp-shell-ease),
    opacity 0.2s ease;
}

.pp-header--shell .pp-nav-toggle__bar {
  box-shadow: none;
}

.pp-nav-toggle[aria-expanded="true"] .pp-nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.pp-nav-toggle[aria-expanded="true"] .pp-nav-toggle__bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0.5);
}

.pp-nav-toggle[aria-expanded="true"] .pp-nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Bottom sheet menu --- */
.pp-mobile-sheet {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  align-items: end;
  pointer-events: none;
}

.pp-mobile-sheet:not([hidden]) {
  pointer-events: auto;
}

.pp-mobile-sheet__backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--pp-dark) 52%, transparent);
  opacity: 0;
  transition: opacity 0.32s var(--pp-shell-ease);
}

.pp-mobile-sheet.is-open .pp-mobile-sheet__backdrop {
  opacity: 1;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.pp-mobile-sheet__panel {
  position: relative;
  width: min(100%, 520px);
  max-height: min(88vh, 720px);
  margin-inline: auto;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  border-radius: var(--pp-shell-sheet-radius) var(--pp-shell-sheet-radius) 0 0;
  background: var(--pp-surface-elevated);
  border: 1px solid color-mix(in srgb, var(--pp-primary) 12%, var(--pp-border));
  border-bottom: 0;
  box-shadow: 0 -24px 64px color-mix(in srgb, var(--pp-dark) 18%, transparent);
  transform: translateY(105%);
  transition: transform 0.42s var(--pp-shell-ease);
  overflow: hidden;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.pp-mobile-sheet.is-open .pp-mobile-sheet__panel {
  transform: translateY(0);
  transition: transform 0.48s var(--pp-shell-ease-spring);
}

.pp-mobile-sheet.is-closing .pp-mobile-sheet__panel {
  transform: translateY(105%);
}

.pp-mobile-sheet__header {
  padding: 0.65rem var(--pp-shell-padding-x) 0.35rem;
}

.pp-mobile-sheet__handle {
  width: 42px;
  height: 4px;
  margin: 0 auto 0.75rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--pp-text) 18%, transparent);
}

.pp-mobile-sheet__title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.pp-mobile-sheet__title {
  margin: 0;
  font-family: var(--pp-font-heading);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.pp-mobile-sheet__nav {
  overflow: auto;
  overscroll-behavior: contain;
  padding: 0.35rem var(--pp-shell-padding-x) 0.75rem;
  grid-row: 2;
  min-height: 0;
}

.pp-mobile-sheet__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.pp-mobile-sheet__item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 92px;
  padding: 0.65rem 0.35rem;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--pp-primary) 8%, var(--pp-border));
  background: color-mix(in srgb, var(--pp-surface) 96%, transparent);
  color: var(--pp-text);
  text-align: center;
  overflow: hidden;
  transition:
    transform 0.22s var(--pp-shell-ease),
    border-color 0.22s ease,
    background 0.22s ease,
    box-shadow 0.22s ease;
}

.pp-mobile-sheet__item::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, color-mix(in srgb, var(--pp-accent) 16%, transparent), transparent 72%);
  opacity: 0;
  transition: opacity 0.24s ease;
}

.pp-mobile-sheet__item:active {
  transform: scale(0.96);
}

.pp-mobile-sheet__item:active::before {
  opacity: 1;
}

.pp-mobile-sheet__item.is-active {
  border-color: color-mix(in srgb, var(--pp-primary) 42%, var(--pp-border));
  background: color-mix(in srgb, var(--pp-primary) 8%, var(--pp-surface));
  color: var(--pp-primary);
}

.pp-mobile-sheet__item--action .pp-shell-icon--chevron {
  position: absolute;
  top: 0.55rem;
  right: 0.45rem;
  width: 14px;
  height: 14px;
  opacity: 0.45;
}

.pp-mobile-sheet__icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--pp-primary) 7%, transparent);
  color: var(--pp-primary);
}

.pp-mobile-sheet__label {
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.2;
}

.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li {
  animation: pp-sheet-item-in 0.42s var(--pp-shell-ease) both;
}

.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(1) { animation-delay: 40ms; }
.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(2) { animation-delay: 60ms; }
.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(3) { animation-delay: 80ms; }
.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(4) { animation-delay: 100ms; }
.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(5) { animation-delay: 120ms; }
.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(6) { animation-delay: 140ms; }
.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(7) { animation-delay: 160ms; }
.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(8) { animation-delay: 180ms; }
.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(9) { animation-delay: 200ms; }
.pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li:nth-child(10) { animation-delay: 220ms; }

@keyframes pp-sheet-item-in {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.94);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Bookmarks panel */
.pp-mobile-sheet__bookmarks {
  grid-row: 2;
  overflow: auto;
  padding: 0.5rem var(--pp-shell-padding-x) 0.75rem;
  min-height: 0;
}

.pp-mobile-sheet__bookmarks-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.pp-mobile-sheet__bookmarks-head h3 {
  margin: 0;
  font-size: 1rem;
}

.pp-mobile-sheet__back {
  border: 0;
  background: none;
  color: var(--pp-primary);
  font-weight: 600;
  cursor: pointer;
  padding: 0.35rem 0;
}

.pp-mobile-sheet__bookmark-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.pp-mobile-sheet__bookmark-list a {
  display: block;
  padding: 0.75rem 0.85rem;
  border-radius: 12px;
  border: 1px solid var(--pp-border);
  color: var(--pp-text);
  font-weight: 600;
  font-size: 0.88rem;
}

.pp-mobile-sheet__empty {
  margin: 0.5rem 0 0;
  color: var(--pp-text-muted);
  font-size: 0.88rem;
}

.pp-mobile-sheet__footer {
  padding: 0.85rem var(--pp-shell-padding-x) calc(0.85rem + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--pp-border);
  background: color-mix(in srgb, var(--pp-surface-muted) 70%, var(--pp-surface));
  display: grid;
  gap: 0.75rem;
}

.pp-mobile-sheet__setting {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.pp-mobile-sheet__setting-label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--pp-text);
}

.pp-mobile-sheet__version {
  margin: 0.15rem 0 0;
  font-size: 0.72rem;
  color: var(--pp-text-muted);
  letter-spacing: 0.02em;
}

/* --- Bottom navigation --- */
.pp-bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 130;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  border-top: 1px solid color-mix(in srgb, var(--pp-primary) 10%, var(--pp-border));
  background: color-mix(in srgb, var(--pp-header-bg) 88%, transparent);
  backdrop-filter: blur(18px) saturate(1.25);
  -webkit-backdrop-filter: blur(18px) saturate(1.25);
  box-shadow: 0 -8px 32px color-mix(in srgb, var(--pp-dark) 8%, transparent);
  transform: translateY(0);
  transition: transform 0.34s var(--pp-shell-ease);
}

.pp-bottom-nav.is-hidden {
  transform: translateY(calc(100% + 8px));
}

.pp-bottom-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: stretch;
  min-height: var(--pp-shell-bottom-nav-height);
}

.pp-bottom-nav__list > li {
  display: flex;
  min-width: 0;
}

.pp-bottom-nav__item {
  position: relative;
  display: flex;
  flex: 1 1 auto;
  width: 100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.28rem;
  padding: 0.5rem 0.2rem 0.42rem;
  border: 0;
  background: none;
  color: var(--pp-text-muted);
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition: color 0.22s ease, transform 0.18s ease;
}

.pp-bottom-nav__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}

.pp-bottom-nav__icon .pp-shell-icon {
  width: 22px;
  height: 22px;
}

.pp-bottom-nav__label {
  display: block;
  width: 100%;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.015em;
  line-height: 1.1;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pp-bottom-nav__indicator {
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 20px;
  height: 3px;
  margin-left: -10px;
  border-radius: 999px;
  background: var(--pp-accent);
  transform: scaleX(0);
  transition: transform 0.28s var(--pp-shell-ease-spring);
}

.pp-bottom-nav__item.is-active {
  color: var(--pp-primary);
}

.pp-bottom-nav__item.is-active .pp-bottom-nav__indicator {
  transform: scaleX(1);
}

.pp-bottom-nav__item::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 12px;
  background: radial-gradient(circle at center, color-mix(in srgb, var(--pp-accent) 22%, transparent), transparent 72%);
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.28s ease, transform 0.32s var(--pp-shell-ease-spring);
  pointer-events: none;
}

.pp-bottom-nav__item.is-pressed::after {
  opacity: 1;
  transform: scale(1.15);
}

.pp-bottom-nav__item.is-pressed {
  transform: scale(0.96);
}

.pp-bottom-nav__item.is-pressed .pp-bottom-nav__icon {
  transform: scale(0.94);
}

/* --- Mobile utility bar --- */
@media (max-width: 899px) {
  .pp-utility-bar {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: nowrap;
    gap: 0.45rem;
    min-height: var(--pp-shell-sub-header-height);
    padding: 0.38rem var(--pp-shell-padding-x);
    border-top: 1px solid color-mix(in srgb, var(--pp-primary) 8%, var(--pp-border));
    background: color-mix(in srgb, var(--pp-surface-muted) 76%, transparent);
    overflow: hidden;
    max-height: 52px;
    opacity: 1;
    transform: translate3d(0, 0, 0);
    transition:
      opacity 0.34s var(--pp-shell-ease),
      transform 0.34s var(--pp-shell-ease),
      max-height 0.34s var(--pp-shell-ease),
      min-height 0.34s var(--pp-shell-ease),
      padding 0.34s var(--pp-shell-ease),
      border-color 0.34s var(--pp-shell-ease);
    will-change: opacity, transform, max-height;
  }

  .pp-header--shell.is-utility-collapsed .pp-utility-bar {
    opacity: 0;
    transform: translate3d(0, -10px, 0);
    max-height: 0;
    min-height: 0;
    padding-block: 0;
    border-top-color: transparent;
    pointer-events: none;
  }

  .pp-utility-bar__group {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
  }

  .pp-utility-bar__group--lang .pp-lang-switcher {
    display: inline-flex;
    height: 32px;
    padding: 2px;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--pp-primary) 12%, var(--pp-border));
    background: color-mix(in srgb, var(--pp-surface) 92%, transparent);
  }

  .pp-utility-bar__group--lang .pp-lang-switcher__item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2rem;
    height: 28px;
    padding-inline: 0.45rem;
    border-radius: 999px;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-decoration: none;
    color: var(--pp-text-muted);
  }

  .pp-utility-bar__group--lang .pp-lang-switcher__item.is-active {
    background: var(--pp-primary);
    color: #fff;
  }

  .pp-utility-bar__group--theme .pp-dark-toggle {
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--pp-primary) 12%, var(--pp-border));
    background: color-mix(in srgb, var(--pp-surface) 92%, transparent);
  }

  .pp-utility-bar__divider {
    width: 1px;
    height: 18px;
    flex-shrink: 0;
    background: color-mix(in srgb, var(--pp-primary) 14%, var(--pp-border));
    opacity: 0.55;
  }

  .pp-utility-bar__live {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.18rem 0.5rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--pp-accent) 14%, transparent);
    color: var(--pp-accent);
    font-size: 0.58rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .pp-utility-bar__live-dot {
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: var(--pp-accent);
    box-shadow: 0 0 0 0 color-mix(in srgb, var(--pp-accent) 40%, transparent);
    animation: pp-live-pulse 1.8s ease infinite;
  }

  @keyframes pp-live-pulse {
    0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--pp-accent) 45%, transparent); }
    70% { box-shadow: 0 0 0 6px transparent; }
    100% { box-shadow: 0 0 0 0 transparent; }
  }

  .pp-utility-bar__verified {
    display: inline-flex;
    align-items: center;
    gap: 0.32rem;
    min-width: 0;
    flex: 1 1 auto;
    color: color-mix(in srgb, var(--pp-text) 90%, var(--pp-text-muted));
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    white-space: nowrap;
  }

  .pp-utility-bar__verified .pp-icon {
    flex-shrink: 0;
    color: var(--pp-primary);
    opacity: 0.92;
  }

  .pp-utility-bar__verified-text {
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

@media (max-width: 359px) {
  .pp-utility-bar {
    gap: 0.35rem;
  }

  .pp-utility-bar__verified {
    font-size: 0.58rem;
  }
}

@media (min-width: 900px) {
  .pp-utility-bar {
    display: none !important;
  }
}

html.pp-reduced-motion .pp-utility-bar {
  transition: none !important;
}

html.pp-reduced-motion .pp-utility-bar__live-dot {
  animation: none !important;
}

/* Hide duplicate controls when sheet is open on small screens */
@media (max-width: 899px) {
  .pp-mobile-sheet.is-open ~ .pp-bottom-nav {
    transform: translateY(calc(100% + 8px));
  }
}

/* Reduced motion */
html.pp-reduced-motion .pp-mobile-sheet__panel,
html.pp-reduced-motion .pp-bottom-nav,
html.pp-reduced-motion .pp-header--shell {
  transition: none !important;
}

html.pp-reduced-motion .pp-mobile-sheet.is-opening .pp-mobile-sheet__grid > li {
  animation: none !important;
}

/* Flagship refinements */
.pp-demo-research .pp-header--shell {
  border-bottom-color: color-mix(in srgb, var(--pp-primary) 12%, transparent);
}

.pp-demo-research .pp-bottom-nav__item.is-active {
  color: var(--pp-primary);
}

.pp-demo-research .pp-mobile-sheet__item.is-active .pp-mobile-sheet__icon-wrap {
  background: color-mix(in srgb, var(--pp-primary) 14%, transparent);
}

@media (max-width: 380px) {
  .pp-mobile-sheet__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pp-shell-action-gap-adjust {
    --pp-shell-action-gap: 0.35rem;
  }
}

@media (max-width: 899px) {
  .pp-header--shell .pp-shell-actions {
    gap: clamp(0.35rem, 2vw, var(--pp-shell-action-gap));
  }

  .pp-demo-research .pp-container,
  .pp-demo-research .pp-header--shell > .pp-container {
    width: min(calc(100% - (var(--pp-shell-padding-x) * 2)), var(--pp-max-width, 1440px));
    padding-inline: 0;
  }

  .pp-demo-research .pp-home,
  .pp-demo-research .pp-main,
  .pp-demo-research .pp-section,
  .pp-demo-research .pp-container {
    min-width: 0;
    max-width: 100%;
  }

  .pp-demo-research .pp-home {
    overflow-x: clip;
  }

  .pp-demo-research .pp-section__link {
    min-height: 44px;
    align-items: center;
  }

  .pp-demo-research .pp-section__title-row {
    align-items: flex-start;
  }
}