.learn-video_player__Ln1TZ{--vc-text:var(--ui-media-nav-text,#fff);--vc-dim:rgb(255 255 255/0.72);--vc-menu:color-mix(in srgb,var(--ui-media-nav-bg,#0b0d0f) 90%,transparent);--vc-hover:rgb(255 255 255/0.12);position:absolute;inset:0;overflow:hidden;background:#000;color:var(--vc-text);outline:none}.learn-video_player__Ln1TZ:focus-visible{box-shadow:inset 0 0 0 2px var(--ui-focus-ring)}.learn-video_player__Ln1TZ[data-chrome=off]{cursor:none}.learn-video_player__Ln1TZ video{position:absolute;inset:0;width:100%;height:100%;background:#000;object-fit:contain}.learn-video_surface__Bulea{position:absolute;inset:0;z-index:1}.learn-video_bigPlay__uN_va{position:absolute;top:50%;left:50%;z-index:2;display:grid;width:64px;height:64px;place-items:center;padding-left:4px;border-radius:999px;background:rgb(0 0 0/.55);color:#fff;transform:translate(-50%,-50%);transition:background var(--ui-ease),transform var(--ui-ease)}.learn-video_bigPlay__uN_va:focus-visible,.learn-video_bigPlay__uN_va:hover{background:var(--ui-brand);transform:translate(-50%,-50%) scale(1.04)}.learn-video_spinner__fPz8Y{position:absolute;top:50%;left:50%;z-index:2;color:#fff;transform:translate(-50%,-50%);pointer-events:none}.learn-video_spinner__fPz8Y svg{animation:learn-video_spin__R7n7G .9s linear infinite}.learn-video_chrome__uGNTT{position:absolute;right:0;bottom:0;left:0;z-index:3;padding:26px 12px 6px;background:linear-gradient(0deg,rgb(0 0 0/.72),rgb(0 0 0/.38) 55%,transparent);transition:opacity var(--ui-duration-normal) var(--ui-ease-standard)}.learn-video_player__Ln1TZ[data-chrome=off] .learn-video_chrome__uGNTT{opacity:0;pointer-events:none}.learn-video_progress__Na1rD{display:flex;height:14px;align-items:center}.learn-video_progress__Na1rD input{width:100%;height:4px;margin:0;border-radius:999px;background:linear-gradient(to right,var(--ui-brand) 0 var(--played,0),rgb(255 255 255/.42) var(--played,0) var(--loaded,0),rgb(255 255 255/.2) var(--loaded,0) 100%);cursor:pointer;appearance:none;transition:height var(--ui-duration-fast) var(--ui-ease-standard)}.learn-video_progress__Na1rD input:focus-visible,.learn-video_progress__Na1rD:hover input{height:6px}.learn-video_progress__Na1rD input::-webkit-slider-thumb{width:12px;height:12px;border:0;border-radius:999px;background:var(--ui-brand);box-shadow:0 0 0 3px rgb(255 255 255/.18);opacity:0;appearance:none;-webkit-transition:opacity var(--ui-duration-fast);transition:opacity var(--ui-duration-fast)}.learn-video_progress__Na1rD input::-moz-range-thumb{width:12px;height:12px;border:0;border-radius:999px;background:var(--ui-brand);opacity:0}.learn-video_progress__Na1rD input:focus-visible::-webkit-slider-thumb,.learn-video_progress__Na1rD:hover input::-webkit-slider-thumb{opacity:1}.learn-video_progress__Na1rD input:focus-visible::-moz-range-thumb,.learn-video_progress__Na1rD:hover input::-moz-range-thumb{opacity:1}.learn-video_bar__Pj0kc{display:flex;height:38px;align-items:center;justify-content:space-between;gap:12px}.learn-video_group__A7_hs{display:flex;min-width:0;align-items:center;gap:4px}.learn-video_icon__jvtdA,.learn-video_text__de2Ud{display:inline-flex;height:32px;align-items:center;justify-content:center;border-radius:6px;color:var(--vc-text);transition:background var(--ui-duration-fast),color var(--ui-duration-fast)}.learn-video_icon__jvtdA{width:34px}.learn-video_text__de2Ud{min-width:44px;padding:0 8px;font-size:13px;font-weight:600;letter-spacing:.02em;white-space:nowrap}.learn-video_icon__jvtdA:focus-visible,.learn-video_icon__jvtdA:hover,.learn-video_text__de2Ud:focus-visible,.learn-video_text__de2Ud:hover,.learn-video_text__de2Ud[aria-expanded=true]{background:var(--vc-hover);color:#fff}.learn-video_text__de2Ud[aria-expanded=true]{color:var(--ui-brand-text,var(--ui-brand))}.learn-video_clock__zf9OY{margin-left:6px;color:var(--vc-dim);font-size:12px;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;white-space:nowrap}.learn-video_menuAnchor__TponH{position:relative}.learn-video_menu__u5Evy{position:absolute;bottom:calc(100% + 10px);left:50%;display:grid;min-width:132px;padding:6px;border:1px solid rgb(255 255 255/.08);border-radius:var(--ui-radius-sm);background:var(--vc-menu);box-shadow:var(--ui-shadow-popover);transform:translateX(-50%);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:learn-video_menuIn__aXzdL var(--ui-duration-fast) var(--ui-ease-standard)}.learn-video_menu__u5Evy button{display:flex;height:32px;align-items:center;padding:0 12px;border-radius:6px;color:var(--vc-text);font-size:13px;text-align:left;white-space:nowrap}.learn-video_menu__u5Evy button:focus-visible,.learn-video_menu__u5Evy button:hover{background:var(--vc-hover)}.learn-video_menu__u5Evy button[aria-checked=true]{color:var(--ui-brand);font-weight:600}.learn-video_volume__QvEkL{display:flex;align-items:center}.learn-video_volume__QvEkL input{width:0;height:4px;margin:0;border-radius:999px;background:linear-gradient(to right,#fff 0 var(--level,100%),rgb(255 255 255/.28) var(--level,100%) 100%);opacity:0;cursor:pointer;appearance:none;transition:width var(--ui-duration-normal) var(--ui-ease-standard),opacity var(--ui-duration-normal),margin var(--ui-duration-normal)}.learn-video_volume__QvEkL:focus-within input,.learn-video_volume__QvEkL:hover input{width:72px;margin:0 8px 0 2px;opacity:1}.learn-video_volume__QvEkL input::-webkit-slider-thumb{width:11px;height:11px;border-radius:999px;background:#fff;appearance:none}.learn-video_volume__QvEkL input::-moz-range-thumb{width:11px;height:11px;border:0;border-radius:999px;background:#fff}@keyframes learn-video_menuIn__aXzdL{0%{opacity:0;transform:translate(-50%,4px)}to{opacity:1;transform:translate(-50%)}}@keyframes learn-video_spin__R7n7G{to{transform:rotate(1turn)}}@media (hover:none){.learn-video_volume__QvEkL input{display:none}}@media (max-width:560px){.learn-video_clock__zf9OY{display:none}.learn-video_text__de2Ud{min-width:38px;padding:0 6px;font-size:12px}.learn-video_icon__jvtdA{width:30px}}@media (prefers-reduced-motion:reduce){.learn-video_menu__u5Evy{animation:none}.learn-video_spinner__fPz8Y svg{animation-duration:2s}}.learn-player_stage__i52D1{position:relative;overflow:hidden;aspect-ratio:16/9;border-radius:var(--ui-radius-md);background:var(--ui-soft)}.learn-player_poster__rnY55,.learn-player_poster__rnY55 img,.learn-player_stage__i52D1 iframe,.learn-player_stage__i52D1 video{position:absolute;inset:0;width:100%;height:100%;border:0}.learn-player_poster__rnY55{background:var(--ui-soft)}.learn-player_poster__rnY55 img{object-fit:cover}.learn-player_note__sB_60,.learn-player_play__L5Anx,.learn-player_retry__lyikY{position:absolute;inset:0;display:grid;place-items:center;padding:24px;color:var(--ui-text);text-align:center}.learn-player_play__L5Anx button,.learn-player_retry__lyikY button{display:inline-flex;min-height:48px;align-items:center;gap:10px;border-radius:999px;padding:0 20px;background:var(--ui-overlay-button-bg);color:var(--ui-overlay-button-text);font-size:14px;box-shadow:var(--ui-shadow-popover);transition:background var(--ui-ease),transform var(--ui-ease)}.learn-player_play__L5Anx button:focus-visible,.learn-player_play__L5Anx button:hover,.learn-player_retry__lyikY button:focus-visible,.learn-player_retry__lyikY button:hover{background:var(--ui-overlay-button-hover);transform:translateY(-1px)}.learn-player_note__sB_60{color:var(--ui-text-secondary);font-size:13px;background:color-mix(in srgb,var(--ui-soft) 86%,#000 14%)}.learn-player_warn__dRzna{margin:10px 0 0;color:var(--ui-danger);font-size:12px}.learn-player_caption__tr3C3{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-top:12px}.learn-player_caption__tr3C3 p{margin:0;color:var(--ui-text-secondary);font-size:12px}.learn-player_caption__tr3C3 strong{color:var(--ui-text);font-size:14px;font-weight:600}.learn-player_hoverTitle__Vclv9{position:absolute;top:14px;left:16px;z-index:4;max-width:70%;overflow:hidden;padding:7px 10px;border-radius:6px;background:rgb(0 0 0/.68);color:#fff;font-size:13px;font-weight:600;opacity:0;transform:translateY(-5px);text-overflow:ellipsis;white-space:nowrap;transition:opacity .18s,transform .18s;pointer-events:none}.learn-player_stage__i52D1:focus-within .learn-player_hoverTitle__Vclv9,.learn-player_stage__i52D1:hover .learn-player_hoverTitle__Vclv9{opacity:1;transform:none}.learn-rail_rail__oG_wk{position:sticky;top:calc(var(--topbar, 64px) + 16px);min-width:0}.learn-rail_rail__oG_wk h2{margin:0 0 14px;font-size:15px;font-weight:650}.learn-rail_list__jg9Yt,.learn-rail_thumbs__KO0ap{display:grid;gap:8px;margin:0;padding:0;list-style:none}.learn-rail_item__sKZgz,.learn-rail_thumb__fzQPY{display:grid;width:100%;gap:12px;align-items:center;border:1px solid transparent;border-radius:var(--ui-radius-sm);padding:8px;background:transparent;color:inherit;text-align:left;transition:background var(--ui-ease),border-color var(--ui-ease)}.learn-rail_item__sKZgz{grid-template-columns:36px 1fr auto}.learn-rail_thumb__fzQPY{grid-template-columns:88px 1fr}.learn-rail_item__sKZgz:focus-visible,.learn-rail_item__sKZgz:hover,.learn-rail_thumb__fzQPY:focus-visible,.learn-rail_thumb__fzQPY:hover{background:var(--ui-soft)}.learn-rail_item__sKZgz[aria-current=true],.learn-rail_on__kLgGH,.learn-rail_thumb__fzQPY[aria-current=true]{border-color:var(--ui-brand);background:var(--ui-brand-soft)}.learn-rail_cover__h2csX{overflow:hidden;aspect-ratio:16/10;border-radius:6px;background:var(--ui-soft)}.learn-rail_cover__h2csX img{transition:transform var(--ui-ease)}.learn-rail_thumb__fzQPY:hover .learn-rail_cover__h2csX img{transform:scale(1.04)}.learn-rail_index__VKT83{color:var(--ui-text-secondary);font-size:12px}.learn-rail_copy__61bZb{min-width:0}.learn-rail_copy__61bZb strong{display:block;overflow:hidden;font-size:13px;font-weight:600;line-height:1.45;text-overflow:ellipsis;white-space:nowrap}.learn-rail_copy__61bZb small,.learn-rail_meta__MH9A3{display:block;margin-top:4px;color:var(--ui-text-secondary);font-size:11px}.learn-rail_card__pAGP9{display:grid;grid-template-columns:88px 1fr;gap:12px;align-items:center;border-radius:var(--ui-radius-sm);padding:8px;color:inherit;transition:background var(--ui-ease)}.learn-rail_card__pAGP9:focus-visible,.learn-rail_card__pAGP9:hover{background:var(--ui-soft)}.learn-rail_card__pAGP9 h3{margin:0;font-size:13px;font-weight:600;line-height:1.45}.learn-rail_empty__qedu4{color:var(--ui-text-secondary);font-size:12px}.learn-rail_card__pAGP9{grid-template-columns:minmax(110px,42%) minmax(0,1fr);align-items:start;padding:6px 0}.learn-rail_card__pAGP9 .learn-rail_cover__h2csX{position:relative;aspect-ratio:16/9}.learn-rail_card__pAGP9 h3{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-weight:500}.learn-rail_duration__NEiM6{position:absolute;right:5px;bottom:5px;padding:2px 4px;border-radius:3px;background:rgb(0 0 0/.7);color:#fff;font-size:10px}