:root{--ds-header-surface-padding-block-end:var(--dimension-x4);--ds-header-surface-padding-block-start:var(--dimension-x5);--ds-header-title-block-size:var(--font-size-t8);--ds-header-block-size:calc(var(--ds-header-surface-padding-block-start) + var(--ds-header-title-block-size) + var(--ds-header-surface-padding-block-end));--ds-header-safe-area-block-size:calc(var(--layout-safe-area-inset-top) + var(--ds-header-block-size))}.ds-header,.ds-header__spacer{--ds-header-description-color:var(--fg-text-tertiary);--ds-header-stroke:var(--stroke-glass);--ds-header-content-min-block-size:var(--dimension-x0);--ds-header-overscroll-cover-block-size:var(--dimension-x12);--ds-header-surface-padding-inline:var(--dimension-x4);--ds-header-surface-inline-size:100%;--ds-header-title-color:var(--fg-text-primary);--ds-header-title-font-family:var(--font-family-brand);--ds-header-title-font-size:var(--font-size-t8);--ds-header-title-font-weight:var(--font-weight-bold);--ds-header-title-line-height:1;--ds-header-z-index:calc(var(--elevation-global-default-z-index) + var(--elevation-local-transient-z-index))}.ds-header{z-index:var(--ds-header-z-index);border-block-end:var(--dimension-stroke-component-default) solid var(--stroke-transparent);inline-size:100%;color:var(--ds-header-title-color);font-family:var(--font-family-sans);isolation:isolate;background:0 0;overflow:visible}.ds-header:before{z-index:0;inset-block:var(--dimension-x0);inset-inline:var(--dimension-x0);background:var(--bg-glass-bright);backface-visibility:hidden;-webkit-backdrop-filter:blur(14px)saturate(165%);backdrop-filter:blur(14px)saturate(165%);content:"";pointer-events:none;position:absolute;transform:translate(0,0)}@supports not ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.ds-header:before{background:var(--bg-layer-default)}}.orbi-tutor-native-webview .ds-header:before{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--bg-layer-default)}.ds-header--fixed{inset-block-start:var(--dimension-x0);inset-inline:var(--dimension-x0);backface-visibility:hidden;transition:transform var(--motion-duration-macro-fast) var(--motion-easing-track);position:fixed;transform:translate(0,0)}.ds-header--fixed:before{inset-block-start:calc(var(--ds-header-overscroll-cover-block-size) * -1)}.ds-header--fixed .ds-header__surface{transition:opacity var(--motion-duration-macro-fast) var(--motion-easing-track)}.ds-header--fixed.ds-header--retracted{transform:translateY(-100%)}.ds-header--fixed.ds-header--safe-area.ds-header--retracted{transform:translate3d(0, calc(-100% + var(--layout-safe-area-inset-top)), 0)}.ds-header--fixed.ds-header--retracted .ds-header__surface{opacity:0}.ds-header--sticky{position:sticky;inset-block-start:var(--dimension-x0)}.ds-header--static{position:relative}.ds-header--safe-area{padding-block-start:var(--layout-safe-area-inset-top)}.ds-header__surface{z-index:1;inline-size:min(100%, var(--ds-header-surface-inline-size));padding-block:var(--ds-header-surface-padding-block-start) var(--ds-header-surface-padding-block-end);padding-inline:var(--ds-header-surface-padding-inline);margin-inline:auto;position:relative}.ds-header__content{align-items:center;gap:var(--dimension-x3);min-block-size:var(--ds-header-content-min-block-size);display:flex}.ds-header__title-wrap{gap:var(--dimension-x0_5);min-inline-size:var(--dimension-x0);text-align:start;flex:auto;display:grid}.ds-header__leading{flex:none;justify-content:flex-start;align-items:center;margin-inline-start:calc(var(--dimension-x2) * -1);display:flex}.ds-header__title-row{align-items:center;gap:var(--dimension-x2);min-inline-size:var(--dimension-x0);display:flex}.ds-header__title{min-inline-size:var(--dimension-x0);margin:var(--dimension-x0);color:var(--ds-header-title-color);font-family:var(--ds-header-title-font-family);font-size:var(--ds-header-title-font-size);font-weight:var(--ds-header-title-font-weight);line-height:var(--ds-header-title-line-height);letter-spacing:var(--letter-spacing-default);text-overflow:ellipsis;white-space:nowrap;flex:0 auto;overflow:hidden}.ds-header__title-accessory{min-inline-size:var(--dimension-x0);flex:none;align-items:center;display:inline-flex}.ds-header__description{margin:var(--dimension-x0);color:var(--ds-header-description-color);font-size:var(--font-size-t3-static);font-weight:var(--font-weight-medium);line-height:var(--line-height-t3-static);letter-spacing:var(--letter-spacing-default);text-overflow:ellipsis;-webkit-line-clamp:1;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.ds-header__trailing{justify-content:flex-end;align-items:center;gap:var(--dimension-x1);flex:none;display:flex}.ds-header__spacer{block-size:var(--ds-header-block-size)}.ds-header__spacer--safe-area{block-size:var(--ds-header-safe-area-block-size)}.ds-header__spacer--with-description{block-size:calc(var(--ds-header-surface-padding-block-start) + var(--dimension-x14) + var(--ds-header-surface-padding-block-end))}.ds-header__spacer--safe-area.ds-header__spacer--with-description{block-size:calc(var(--layout-safe-area-inset-top) + var(--ds-header-surface-padding-block-start) + var(--dimension-x14) + var(--ds-header-surface-padding-block-end))}@media (min-width:768px){:root{--ds-header-surface-padding-block-start:var(--dimension-x6)}.ds-header,.ds-header__spacer{--ds-header-surface-inline-size:var(--layout-container-tablet)}}@media (min-width:1024px){.ds-header,.ds-header__spacer{--ds-header-surface-inline-size:var(--layout-container-desktop);--ds-header-surface-padding-inline:var(--dimension-x5)}}