.uiOptionsClose {
  display: grid; place-items: center; flex: none; width: 44px; height: 44px;
  border: 0; border-radius: 50%; background: #F2F2F7; color: #4C4C52; font-size: 30px; cursor: pointer;
}
.uiOptionsClose:focus-visible { outline: 3px solid #0071E3; outline-offset: 3px; }
.uiInstallButton {
  min-height: 44px; padding: 10px 15px; border: 1px solid #D8DFE8; border-radius: 12px;
  background: #fff; color: #005EBE; font: inherit; font-size: 15px; font-weight: 650; cursor: pointer;
}
.uiInstallButton:focus-visible { outline: 3px solid #0071E3; outline-offset: 3px; }
.uiInstallButton:disabled { cursor: default; opacity: .6; }
.uiInstallButton[hidden] { display: none; }
@media (max-width: 520px) {
  .reader > .readerNav { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; padding-block: 6px; }
  .reader > .readerNav #back { grid-area: 1 / 1; }
  .reader > .readerNav #title { grid-area: 1 / 2 / 2 / 4; min-width: 0; }
  .reader > .readerNav #fullScreen { grid-area: 2 / 2; justify-self: center; }
  .reader > .readerNav #prev { grid-area: 2 / 1; }
  .reader > .readerNav #next { grid-area: 2 / 3; }
  .presentationNav #back { order: 0; }
  .presentationNav #title { order: 1; flex-basis: calc(100% - 78px); }
  .presentationNav > :not(#back):not(#title) { order: 3; }
}
.uiInstallGuide {
  box-sizing: border-box; width: min(540px, calc(100% - 24px));
  max-height: calc(100dvh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
  margin: auto; padding: 26px; border: 0; border-radius: 24px; background: #fff; color: #1D1D1F;
  box-shadow: 0 24px 80px rgba(0,0,0,.24); overflow: auto; overscroll-behavior: contain;
  text-align: left; font-family: inherit;
}
.uiInstallGuide::backdrop { background: rgba(15,23,42,.56); }
.uiInstallGuideHead { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.uiInstallGuideHead h2 { margin: 0; font-size: 29px; font-weight: 700; line-height: 1.15; letter-spacing: -.5px; }
.uiInstallGuideHead h2:focus { outline: none; }
.uiInstallGuideIntro { margin: 12px 0 22px; color: #535961; font-size: 17px; line-height: 1.45; }
.uiInstallDevices { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 4px; margin: 20px 0 18px; padding: 4px; border-radius: 14px; background: #F0F2F5; }
.uiInstallDevices button { min-width: 0; min-height: 46px; padding: 8px; border: 0; border-radius: 10px; background: transparent; color: #505864; font: inherit; font-size: 14px; line-height: 1.2; font-weight: 600; cursor: pointer; }
.uiInstallDevices button[aria-pressed="true"] { background: #fff; color: #005EBE; box-shadow: 0 1px 5px rgba(25,42,65,.12); }
.uiInstallDevices button:focus-visible { outline: 3px solid #0071E3; outline-offset: 2px; }
.uiInstallMenuStack { display: grid; gap: 8px; }
.uiInstallMenuStack .uiInstallMenuRow { font-size: 14px; }
.uiInstallMenuChevron { margin-left: auto; font-size: 25px; color: #677586; }
.uiInstallMacMenu { display: flex; align-items: center; gap: 24px; min-height: 48px; padding: 0 12px; border-radius: 9px; background: #E9EDF2; color: #26394F; font-size: 16px; }
.uiInstallTapTarget { position: relative; }
.uiInstallTapTarget::after { content: ""; position: absolute; right: 7px; bottom: 3px; width: 20px; height: 20px; border: 2px solid #0071E3; border-radius: 50%; background: rgba(0,113,227,.1); pointer-events: none; animation: uiInstallTap 1.8s ease-out 3; }
@keyframes uiInstallTap { 0%, 100% { transform: scale(1); opacity: .3; } 35% { transform: scale(.65); opacity: 1; } 70% { transform: scale(1.4); opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .uiInstallTapTarget::after { animation: none; opacity: .5; } }
.uiInstallGuideSteps { display: grid; gap: 20px; margin: 0; padding: 0; list-style: none; }
.uiInstallGuideStep { display: grid; grid-template-columns: 38px minmax(0, 1fr); gap: 12px; margin: 0; }
.uiInstallStepNumber {
  display: grid; place-items: center; width: 38px; height: 38px; margin-top: 1px;
  border-radius: 50%; background: #005EBE; color: #fff; font-size: 21px; font-weight: 700;
}
.uiInstallStepContent { min-width: 0; }
.uiInstallStepContent h3 { margin: 0; font-size: 22px; font-weight: 700; line-height: 1.2; letter-spacing: -.25px; }
.uiInstallStepContent > p { margin: 5px 0 0; font-size: 16px; line-height: 1.4; color: #535961; }
.uiInstallExample { position: relative; margin-top: 9px; padding: 17px 8px 7px; border: 1px solid #DFE6EE; border-radius: 12px; background: #F6F8FB; pointer-events: none; user-select: none; }
.uiInstallExampleLabel { position: absolute; top: 4px; left: 9px; color: #65717E; font-size: 10px; font-weight: 600; letter-spacing: .6px; text-transform: uppercase; }
.uiInstallBrowser { border: 1px solid #D8DFE8; border-radius: 8px; background: #fff; overflow: hidden; }
.uiInstallBrowserBar { display: flex; justify-content: space-between; align-items: center; gap: 9px; min-height: 40px; padding: 4px 10px; background: #EEF1F6; }
.uiInstallAddress { overflow: hidden; color: #4C555F; font-size: 12px; white-space: nowrap; text-overflow: ellipsis; }
.uiInstallShareSymbol { position: relative; display: grid; place-items: center; width: 34px; height: 34px; flex: none; border-radius: 8px; color: #005EBE; background: #DFECFF; }
.uiInstallShareSymbol > svg:not(.uiInstallPointer) { width: 25px; height: 25px; }
.uiInstallPointer { position: absolute; top: -28px; left: 5px; width: 24px; height: 24px; transform: rotate(180deg); animation: uiInstallPoint 1.6s ease-in-out 3; }
.uiInstallBrowserPage { display: flex; flex-direction: column; justify-content: center; gap: 5px; height: 33px; padding: 0 10px; }
.uiInstallBrowserPage span { display: block; width: 55%; height: 4px; border-radius: 3px; background: #E7EDF3; }
.uiInstallBrowserPage span + span { width: 35%; }
.uiInstallBrowserTablet .uiInstallPointer { top: auto; bottom: -28px; transform: none; animation-name: uiInstallPointUp; }
.uiInstallMenuRow { display: flex; align-items: center; gap: 8px; min-height: 42px; padding: 3px 8px; border: 1px solid #DDE4EC; border-radius: 8px; color: #26394F; background: #fff; font-size: 15px; line-height: 1.25; font-weight: 600; }
.uiInstallMenuRow svg { flex: none; width: 27px; height: 27px; color: #005EBE; }
.uiInstallConfirm { display: flex; align-items: center; gap: 8px; min-height: 44px; padding: 4px; color: #4C555F; font-size: 13px; line-height: 1.2; }
.uiInstallConfirm img { flex: none; width: 32px; height: 32px; border-radius: 7px; }
.uiInstallAddLabel { margin-left: auto; color: #005EBE; font-size: 16px; font-weight: 700; }
.uiInstallGuideHelp { margin-top: 20px; border-top: 1px solid #E1E6ED; }
.uiInstallGuideHelp summary { padding: 12px 0; min-height: 44px; box-sizing: border-box; color: #0057B8; font-size: 15px; line-height: 1.4; font-weight: 650; cursor: pointer; }
.uiInstallGuideHelp p { margin: 0 0 12px; font-size: 15px; line-height: 1.5; color: #535961; }
.uiInstallGuideDone, .uiInstallGuideCopy { width: 100%; min-height: 50px; padding: 12px 16px; border: 0; border-radius: 12px; font: inherit; font-size: 18px; font-weight: 650; cursor: pointer; }
.uiInstallGuideDone { margin-top: 18px; border: 1px solid #D8DFE8; background: #fff; color: #005EBE; }
.uiInstallGuideCopy { margin-top: 20px; border: 1px solid #0071E3; background: #0071E3; color: #fff; }
.uiInstallCopy label { display: block; margin: 14px 0 5px; color: #535961; font-size: 14px; }
.uiInstallCopy input { box-sizing: border-box; width: 100%; min-height: 44px; padding: 10px; border: 1px solid #CED8E4; border-radius: 8px; background: #fff; color: #26394F; font: inherit; font-size: 16px; }
.uiInstallCopy [data-ui-copy-status] { margin: 10px 0 0; color: #26394F; font-size: 16px; line-height: 1.4; }
.uiInstallCopy [data-ui-copy-status]:empty { display: none; }
.uiInstallGuideDone:focus-visible, .uiInstallGuideCopy:focus-visible, .uiInstallGuideHelp summary:focus-visible, .uiInstallCopy input:focus-visible { outline: 3px solid #0071E3; outline-offset: 3px; }
@keyframes uiInstallPoint { 0%, 100% { transform: translateY(-3px) rotate(180deg); } 50% { transform: translateY(2px) rotate(180deg); } }
@keyframes uiInstallPointUp { 0%, 100% { transform: translateY(3px); } 50% { transform: translateY(-2px); } }
@media (max-width: 430px) {
  .uiInstallGuide { padding: 20px; }
  .uiInstallGuideHead h2 { font-size: 26px; }
  .uiInstallGuideIntro { margin-bottom: 18px; font-size: 16px; }
  .uiInstallGuideSteps { gap: 17px; }
  .uiInstallGuideStep { grid-template-columns: 32px minmax(0, 1fr); gap: 10px; }
  .uiInstallStepNumber { width: 32px; height: 32px; font-size: 19px; }
  .uiInstallStepContent h3 { font-size: 20px; }
}
@media (max-width: 350px) {
  .uiInstallGuide { padding: 16px; }
  .uiInstallGuideHead h2 { font-size: 24px; }
  .uiInstallGuideStep { gap: 8px; }
  .uiInstallConfirm { flex-wrap: wrap; }
  .uiInstallConfirm > span:not(.uiInstallAddLabel) { flex: 1; }
}
@media (max-height: 500px) {
  .uiInstallGuide { margin-block: 12px; max-height: calc(100dvh - 24px); }
}
@media (prefers-reduced-motion: reduce) {
  .uiInstallPointer { animation: none; }
}

/* Decorative line icons stay separate from translated button labels. */
:root {
  --ui-icon-options: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22M4%206h4m4%200h8M4%2012h10m4%200h2M4%2018h2m4%200h10%22/%3E%3Ccircle%20cx%3D%2210%22%20cy%3D%226%22%20r%3D%222%22/%3E%3Ccircle%20cx%3D%2216%22%20cy%3D%2212%22%20r%3D%222%22/%3E%3Ccircle%20cx%3D%228%22%20cy%3D%2218%22%20r%3D%222%22/%3E%3C/svg%3E");
  --ui-icon-share: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22M8%209H5v12h14V9h-3M12%2015V2m-4%204%204-4%204%204%22/%3E%3C/svg%3E");
  --ui-icon-download: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22M12%203v12m-4-4%204%204%204-4M4%2016v5h16v-5%22/%3E%3C/svg%3E");
  --ui-icon-install: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Crect%20x%3D%225%22%20y%3D%222%22%20width%3D%2214%22%20height%3D%2220%22%20rx%3D%223%22/%3E%3Cpath%20d%3D%22M12%207v8m-4-4h8M10%2019h4%22/%3E%3C/svg%3E");
  --ui-icon-copy: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Crect%20x%3D%228%22%20y%3D%228%22%20width%3D%2212%22%20height%3D%2213%22%20rx%3D%222%22/%3E%3Cpath%20d%3D%22M16%208V5a2%202%200%200%200-2-2H5a2%202%200%200%200-2%202v10a2%202%200%200%200%202%202h3%22/%3E%3C/svg%3E");
  --ui-icon-book: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22M12%205v16M12%205C9%203%206%203%203%204v15c3-1%206-1%209%201%203-2%206-2%209-1V4c-3-1-6-1-9%201Z%22/%3E%3C/svg%3E");
  --ui-icon-back: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22m14%205-7%207%207%207%22/%3E%3C/svg%3E");
  --ui-icon-next: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22m10%205%207%207-7%207%22/%3E%3C/svg%3E");
  --ui-icon-expand: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22M8%203H3v5m13-5h5v5M3%2016v5h5m13-5v5h-5%22/%3E%3C/svg%3E");
  --ui-icon-link: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22m10%2013%204-4M8%2016l-2%202a3.5%203.5%200%200%201-5-5l4-4a3.5%203.5%200%200%201%205%200m4-1%202-2a3.5%203.5%200%200%201%205%205l-4%204a3.5%203.5%200%200%201-5%200%22%20transform%3D%22translate%281%200%29%22/%3E%3C/svg%3E");
  --ui-icon-clear: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22black%22%20stroke-width%3D%221.7%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22M5%207h14M9%207V4h6v3M7%207l1%2014h8l1-14M10%2011v6m4-6v6%22/%3E%3C/svg%3E");
}
body :is(.uiInstallButton, .shareTrigger, .dlBtn, .dlRow, .downloadTool, .uiInstallGuideCopy, #dlBtn, #savePdf, #download, #clearAnswers, #fullScreen, #prev, #next, .courseShareButton):not([hidden]) {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  box-sizing: border-box; min-height: 44px; line-height: 1.3; vertical-align: middle;
}
body :is(.uiInstallButton, .shareTrigger, .dlBtn, .dlRow, .downloadTool, .uiInstallGuideCopy, #dlBtn, #savePdf, #download, #clearAnswers, #fullScreen, #prev, #next, .courseShareButton)::before {
  content: ""; display: block; flex: none; width: 19px; height: 19px; background-color: currentColor;
  -webkit-mask: var(--ui-action-icon) center / contain no-repeat;
  mask: var(--ui-action-icon) center / contain no-repeat;
}
body :is(.uiInstallButton) { --ui-action-icon: var(--ui-icon-install); }
body :is(.shareTrigger, .shareRow), body .courseShareNative { --ui-action-icon: var(--ui-icon-share); }
body :is(.dlBtn:not(.shareTrigger), .dlRow:not(.shareRow), .downloadTool, #dlBtn, #savePdf, #download) { --ui-action-icon: var(--ui-icon-download); }
body .uiInstallGuideCopy { --ui-action-icon: var(--ui-icon-copy); }
body .courseShareCreate { --ui-action-icon: var(--ui-icon-link); }
body #prev { --ui-action-icon: var(--ui-icon-back); }
body #next { --ui-action-icon: var(--ui-icon-next); }
body #fullScreen { --ui-action-icon: var(--ui-icon-expand); }
body #clearAnswers { --ui-action-icon: var(--ui-icon-clear); }
body :is(.uiInstallButton) {
  border: 1px solid #D8DFE8; border-radius: 12px; background: #fff; color: #005EBE;
  box-shadow: 0 1px 2px rgba(20, 35, 50, .03); font-weight: 600;
}
body .catalogActions { gap: 10px; }
body .catalogActions :is(.catalogDownload, .uiInstallButton) {
  margin: 8px 0 0; padding: 10px 13px; border: 1px solid #D8DFE8; border-radius: 12px;
  background: #fff; color: #005EBE; font-size: 15px; font-weight: 600;
}
body :is(.dlBtn, .wBtn) { border-radius: 12px; }
body :is(.dlRow, .shareTrigger) { font-weight: 600; }
body .dlRow { border-radius: 10px; }
body :is(.uiInstallButton, .shareTrigger, .dlBtn, .dlRow, .downloadTool, .uiInstallGuideCopy, #dlBtn, #savePdf, #download, #clearAnswers, #fullScreen, #prev, #next, .courseShareButton):focus-visible {
  outline: 3px solid #0071E3; outline-offset: 3px;
}
body :is(.uiInstallButton, .shareTrigger, .dlBtn, .dlRow, .downloadTool, #dlBtn, #savePdf, #download, #clearAnswers, #fullScreen, #prev, #next, .courseShareButton):not(:disabled):active { filter: brightness(.95); }
@media (hover: hover) {
  body :is(.uiInstallButton):not(:disabled):hover { background: #EDF2F8; border-color: #C4D1DF; }
  body .catalogActions .catalogDownload:not(:disabled):hover { background: #F4F8FD; border-color: #C4D1DF; }
}
@media (max-width: 520px) {
  body :is(.answerActions .wBtn, .presentationNav .navBtn) { gap: 6px; }
  body :is(.answerActions .wBtn, .presentationNav .navBtn)::before { width: 17px; height: 17px; }
}


.uiInstallNativeLabel { display: block; margin: 0 0 8px; color: #535961; font-size: 15px; line-height: 1.4; }
.uiInstallGuide [data-ui-native-language] { min-height: 44px; width: 100%; margin-bottom: 14px; padding: 8px 12px; border: 1px solid #CED8E4; border-radius: 10px; background: #fff; color: #26394F; font: inherit; font-size: 16px; }
.uiInstallGuide [data-ui-native-language]:focus-visible { outline: 3px solid #0071E3; outline-offset: 3px; }

.uiInstallRealExample { margin-top: 4px; }
.uiInstallRealExample summary { display: list-item; min-height: 44px; padding: 12px 0 8px; color: #0057B8; font-size: 15px; line-height: 1.4; font-weight: 600; cursor: pointer; }
.uiInstallRealExample summary:focus-visible { outline: 3px solid #0071E3; outline-offset: 3px; }
.uiInstallRealExample figure { margin: 0; }
.uiInstallScreenshotCrop { position: relative; width: 100%; aspect-ratio: 608 / 130; overflow: hidden; border-radius: 10px; background: #F2F2F7; }
.uiInstallScreenshotCrop img { display: block; width: 100%; height: auto; }
.uiInstallScreenshotRing { position: absolute; left: 24.02%; top: 45.38%; width: 11%; aspect-ratio: 1; border: 2px solid #0071E3; border-radius: 50%; box-shadow: 0 0 0 2px rgba(255,255,255,.9); transform: translate(-50%, -50%); }
.uiInstallScreenshotRing { animation: uiInstallScreenshotPulse 1.6s ease-in-out 3; }
.uiInstallRealExample figcaption { margin: 7px 0 10px; color: #535961; font-size: 13px; line-height: 1.4; }
.uiInstallPhoto { margin: 14px 0 8px; }
.uiInstallPhotoCrop { position: relative; overflow: hidden; border: 1px solid #DEE4EC; border-radius: 12px; background: #F4F5F7; }
.uiInstallPhotoCrop img { display: block; width: 100%; height: auto; }
.uiInstallPhotoRing { position: absolute; box-sizing: border-box; width: 12%; aspect-ratio: 1; border: 2px solid #0071E3; border-radius: 50%; box-shadow: 0 0 0 2px rgba(255,255,255,.95); transform: translate(-50%, -50%); animation: uiInstallScreenshotPulse 1.6s ease-in-out 3; }
.uiInstallClassicToolbar .uiInstallPhotoRing { left: 50%; top: 62%; }
.uiInstallShareAction .uiInstallPhotoRing { left: 15.5%; top: 49%; width: 15%; }
.uiInstallPhoneMore .uiInstallPhotoRing { left: 87.5%; top: 35.3%; width: 19%; }
.uiInstallMoreMenu .uiInstallPhotoRing { left: 84.4%; top: 44%; width: 19%; }
.uiInstallPhoto figcaption { margin: 8px 0 0; color: #535961; font-size: 14px; line-height: 1.4; }
@keyframes uiInstallScreenshotPulse { 0%, 100% { transform: translate(-50%, -50%) scale(1); } 50% { transform: translate(-50%, -50%) scale(1.12); } }
@media (prefers-reduced-motion: reduce) { .uiInstallScreenshotRing, .uiInstallPhotoRing { animation: none; } }

/* Keep the exit control visible without covering the lesson. */
.readerFullScreenBar { flex: none; display: flex; justify-content: flex-end; padding: max(6px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) 6px max(12px, env(safe-area-inset-left)); border-bottom: 1px solid #E4E7EC; background: #fff; }
.readerFullScreenBar[hidden] { display: none; }
#exitFullScreen { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-size: 14px; }
.reader.is-fullscreen > :is(.readerNav, .answerTools) { display: none; }
.reader.is-fullscreen .pdfArea { min-height: 0; padding: 12px max(12px, env(safe-area-inset-right)) 12px max(12px, env(safe-area-inset-left)); background: #15171B; }
.reader.is-fullscreen .pdfArea:focus { outline: none; }
.reader.is-fullscreen #pdfBox { min-width: 0; min-height: 100%; justify-content: center; gap: 0; }
.pg[hidden] { display: none; }
.readerSlideControls { display: grid; flex: none; grid-template-columns: 52px minmax(90px, 160px) 52px; align-items: center; justify-content: center; gap: 16px; padding: 10px max(16px, env(safe-area-inset-right)) max(10px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left)); border-top: 1px solid #E4E7EC; background: #fff; }
.readerSlideControls[hidden] { display: none; }
.readerSlideControls button { display: grid; place-items: center; width: 52px; height: 48px; min-width: 0; padding: 0; border: 1px solid #0071E3; border-radius: 12px; color: #fff; background: #0071E3; cursor: pointer; }
.readerSlideControls button:disabled { border-color: #E1E4E9; color: #9299A4; background: #F2F3F5; cursor: default; }
.readerSlideControls button:focus-visible { outline: 3px solid #0071E3; outline-offset: 3px; }
.readerSlideControls button:not(:disabled):active { background: #005EBE; }
#slideCount { text-align: center; color: #4C4C52; font-size: 16px; font-weight: 650; font-variant-numeric: tabular-nums; }
@media (max-width: 360px) {
  .reader > .readerNav #fullScreen { grid-area: 3 / 1 / 4 / 4; width: 100%; }
}