._surface_p2hyj_1{--course-ink:var(--study-text,#102b50);--course-blue:var(--study-solid,#175ad4);--course-line:var(--study-line,#dce6f2);z-index:100;background:var(--study-surface,#fff);color:var(--course-ink);isolation:isolate;scroll-padding-top:90px;font-family:Manrope,Arial,sans-serif;font-size:15px;line-height:1.65;position:fixed;inset:0;overflow:clip auto}._surface_p2hyj_1 *{box-sizing:border-box}._surface_p2hyj_1 button,._surface_p2hyj_1 input,._surface_p2hyj_1 select,._surface_p2hyj_1 textarea{font:inherit}._surface_p2hyj_1 button,._surface_p2hyj_1 a,._surface_p2hyj_1 select{-webkit-tap-highlight-color:transparent}._surface_p2hyj_1 :is(button,a,input,select,textarea,summary):focus-visible{outline:3px solid var(--study-line,#82b6ff);outline-offset:4px}._surface_p2hyj_1 button{cursor:pointer}._surface_p2hyj_1 button:disabled{cursor:default;opacity:.45}._surface_p2hyj_1 h1,._surface_p2hyj_1 h2,._surface_p2hyj_1 h3,._surface_p2hyj_1 p{margin:0}._surface_p2hyj_1 a{color:inherit}._surface_p2hyj_1 h1,._surface_p2hyj_1 h2,._surface_p2hyj_1 h3{letter-spacing:-.045em;font-weight:650}._surface_p2hyj_1 h1{font-size:clamp(30px,3vw,44px);line-height:1.16}._surface_p2hyj_1 h2{font-size:27px;line-height:1.3}._surface_p2hyj_1 h3{font-size:18px;line-height:1.4}._surface_p2hyj_1 small{color:var(--study-muted,#63768e);font-size:12px}._srOnly_p2hyj_74{clip:rect(0, 0, 0, 0)!important;white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}._topbar_p2hyj_85{z-index:20;border-bottom:1px solid var(--course-line);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#fffffff5;align-items:center;gap:28px;min-height:78px;padding:12px max(28px,50vw - 692px);display:flex;position:sticky;top:0}._brand_p2hyj_98{flex-shrink:0;display:flex}._brand_p2hyj_98 img{object-fit:contain;width:148px;height:auto}._partner_p2hyj_107{border-left:1px solid var(--course-line);letter-spacing:.02em;padding-left:26px;font-size:14px;line-height:1.6;display:grid}._partner_p2hyj_107>span+span{color:var(--study-muted,#58718f);letter-spacing:.01em;font-size:10px}._moduleSelect_p2hyj_120{align-items:center;margin-left:auto;display:flex;position:relative}._moduleSelect_p2hyj_120 select{-webkit-appearance:none;appearance:none;border:1px solid var(--study-line,#cddded);background:var(--study-surface,#f5f9ff);color:var(--study-text,#173b67);cursor:pointer;border-radius:9px;max-width:200px;padding:11px 34px 11px 14px;font-weight:650;font-size:13px!important}._moduleSelect_p2hyj_120 svg{pointer-events:none;position:absolute;right:12px}._returnLink_p2hyj_143{white-space:nowrap;align-items:center;gap:8px;font-size:12px;font-weight:600;text-decoration:none;display:flex}._returnLink_p2hyj_143:hover{color:var(--course-blue)}._masthead_p2hyj_155{justify-content:space-between;align-items:flex-end;gap:24px;max-width:1384px;margin:0 auto;padding:38px 28px 22px;display:flex}._eyebrow_p2hyj_164{letter-spacing:.15em;text-transform:uppercase;color:var(--course-blue);margin-bottom:10px;font-size:10px;font-weight:750;display:block}._masthead_p2hyj_155 p{color:var(--study-muted,#60748f);margin-top:10px;font-size:13px}._saveStatus_p2hyj_178{text-align:right;justify-content:flex-end;align-items:center;gap:7px;max-width:190px;display:flex}._saveStatus_p2hyj_178 svg{color:var(--study-muted,#3d759b);flex-shrink:0}._tabs_p2hyj_190{border-bottom:1px solid var(--course-line);gap:29px;max-width:1328px;margin:0 auto;padding:0 0 1px;display:flex}._tabs_p2hyj_190 button{color:var(--study-muted,#667b96);background:0 0;border:0;padding:15px 0;font-size:13px;font-weight:650;position:relative}._tabs_p2hyj_190 button[aria-selected=true]{color:var(--course-blue)}._tabs_p2hyj_190 button[aria-selected=true]:after{content:"";background:var(--course-blue);border-radius:2px 2px 0 0;height:3px;position:absolute;bottom:-2px;left:0;right:0}._count_p2hyj_220{background:var(--study-surface,#eef4fc);color:var(--study-muted,#52749d);border-radius:5px;margin-left:7px;padding:2px 5px;font-size:10px}._body_p2hyj_228{max-width:1384px;margin:auto;padding:0 28px 60px}._studyLayout_p2hyj_233{grid-template-columns:270px minmax(0,1fr);min-height:calc(100dvh - 245px);display:grid}._rail_p2hyj_238{border-right:1px solid var(--course-line);scrollbar-width:thin;scrollbar-color:#cedcec transparent;align-self:start;max-height:calc(100dvh - 100px);padding:25px 23px 0 0;position:sticky;top:80px;overflow:auto}._railTitle_p2hyj_249{color:var(--study-muted,#59718d);letter-spacing:.06em;text-transform:uppercase;justify-content:space-between;align-items:center;margin-bottom:15px;font-size:11px;font-weight:700;display:flex}._search_p2hyj_260{border:1px solid var(--study-line,#d2dfed);background:var(--study-surface,#f8faff);border-radius:9px;align-items:center;gap:8px;padding:0 11px;display:flex}._search_p2hyj_260 svg{color:var(--study-muted,#6c85a0);flex-shrink:0}._search_p2hyj_260 input{width:100%;min-width:0;color:var(--course-ink);background:0 0;border:0;outline:none;padding:11px 0;font-size:12px}._search_p2hyj_260:focus-within{border-color:var(--study-line,#7ca9ed);box-shadow:0 0 0 3px #dceaff}._filters_p2hyj_287{gap:8px;margin:10px 0 18px;display:grid}._filters_p2hyj_287 select{background:var(--study-surface,#fff);width:100%;min-width:0;color:var(--study-muted,#526d8a);border:1px solid var(--study-line,#dce6f2);border-radius:7px;padding:8px 9px;font-size:11px}._wordList_p2hyj_302,._topicList_p2hyj_303{gap:4px;display:grid}._wordList_p2hyj_302 button,._topicList_p2hyj_303 button{text-align:left;width:100%;color:var(--study-muted,#385474);background:0 0;border:1px solid #0000;border-radius:8px;align-items:center;gap:10px;padding:10px 11px;transition:background .16s,border-color .16s;display:flex}._wordList_p2hyj_302 button:hover,._topicList_p2hyj_303 button:hover{background:var(--study-surface,#f5f8fd)}._wordList_p2hyj_302 button[aria-current=true],._topicList_p2hyj_303 button[aria-current=true]{color:var(--study-accent,#1048a9);background:var(--study-surface,#edf4ff);border-color:var(--study-line,#dceaff)}._wordList_p2hyj_302 button>span:first-child{gap:0;min-width:0;display:grid}._wordList_p2hyj_302 b{overflow-wrap:anywhere;font-size:13px;font-weight:650}._wordList_p2hyj_302 small{text-overflow:ellipsis;white-space:nowrap;max-width:160px;font-size:10px;overflow:hidden}._statusDot_p2hyj_350{background:var(--study-surface,#d5deea);border-radius:50%;flex-shrink:0;width:6px;height:6px;margin-left:auto}._statusDot_p2hyj_350[data-status=review]{background:var(--study-solid-warm,#c98528)}._statusDot_p2hyj_350[data-status=correct]{background:var(--study-solid-green,#2b8a6d)}._statusDot_p2hyj_350[data-status=started]{background:var(--study-solid,#6f9ee8)}._topicList_p2hyj_303 span{color:var(--study-muted,#83a0bf);flex-shrink:0;font-size:10px}._topicList_p2hyj_303 b{font-size:12px;font-weight:600;line-height:1.55}._railEnd_p2hyj_377{color:var(--study-muted,#5f7692);margin:18px 10px 0;font-size:10px}._content_p2hyj_382{min-width:0;padding:37px 0 0 54px}._contentTop_p2hyj_386{justify-content:space-between;align-items:center;gap:12px;margin-bottom:15px;display:flex}._contentTop_p2hyj_386 small{font-size:11px}._wordTitle_p2hyj_396{overflow-wrap:anywhere;letter-spacing:-.06em!important;font-size:clamp(38px,4vw,58px)!important;line-height:1.1!important}._partOfSpeech_p2hyj_402{color:var(--study-muted,#547a9f);letter-spacing:.05em;text-transform:uppercase;background:var(--study-surface,#eff5fc);vertical-align:middle;white-space:nowrap;border-radius:4px;margin-left:12px;padding:3px 8px;font-size:10px;font-weight:600;display:inline-flex}._wordMeaning_p2hyj_416{letter-spacing:-.02em;font-size:20px;margin-top:13px!important}._definition_p2hyj_421{color:var(--study-muted,#617690);max-width:640px;font-size:14px;margin-top:5px!important}._bookmark_p2hyj_427{color:var(--study-muted,#6c83a1);background:0 0;border:0;align-items:center;gap:6px;padding:8px;display:flex;font-size:11px!important}._bookmark_p2hyj_427[aria-pressed=true]{color:var(--study-accent,#175ad4)}._bookmark_p2hyj_427[aria-pressed=true] svg{fill:var(--study-surface,#e4efff)}._exampleList_p2hyj_443{grid-template-columns:1fr 1fr;gap:24px;margin:31px 0;display:grid}._example_p2hyj_443{border-top:2px solid var(--study-line,#dbe9fc);align-content:start;gap:10px;padding:16px 0 0;display:grid}._example_p2hyj_443 span{color:var(--study-muted,#5d7c9f);letter-spacing:.12em;font-size:10px;font-weight:700}._example_p2hyj_443 p{letter-spacing:-.015em;font-size:16px;line-height:1.85}._wordInfo_p2hyj_467{border-top:1px solid var(--course-line);grid-template-columns:1fr 1fr;gap:26px;padding-top:24px;display:grid}._sectionLabel_p2hyj_474{color:var(--study-muted,#526f90);text-transform:uppercase;letter-spacing:.1em!important;margin-bottom:12px!important;font-size:10px!important;font-weight:750!important}._phrases_p2hyj_482{flex-wrap:wrap;gap:8px;display:flex}._phrases_p2hyj_482 span{color:var(--study-muted,#2f5a8b);background:var(--study-surface,#f2f7fe);border-radius:6px;padding:6px 10px;font-size:12px}._usage_p2hyj_494{border-left:3px solid var(--study-line,#9cc3fd);background:linear-gradient(100deg, var(--study-surface,#f1f7ff), transparent);color:var(--study-muted,#4d6987);margin-top:25px;padding:17px 20px;font-size:13px}._entryActions_p2hyj_502{border-top:1px solid var(--course-line);justify-content:space-between;align-items:center;gap:18px;margin-top:32px;padding-top:21px;display:flex}._entryActions_p2hyj_502 small{max-width:260px}._primary_p2hyj_514,._secondary_p2hyj_515,._textButton_p2hyj_516{border-radius:9px;justify-content:center;align-items:center;gap:9px;min-height:43px;padding:11px 17px;font-weight:650;line-height:1.5;text-decoration:none;transition:transform .15s,box-shadow .15s,background .15s;display:inline-flex;font-size:12px!important}._primary_p2hyj_514{color:var(--study-on-solid,#fff);background:linear-gradient(165deg, var(--study-solid,#216cef), var(--study-solid,#104ccf));border:1px solid var(--study-line,#4b86ef);box-shadow:inset 0 1px #ffffff40,0 3px 7px #175ad41a}._primary_p2hyj_514:not(:disabled):hover{transform:translateY(-1px);box-shadow:inset 0 1px #ffffff60,0 5px 13px #175ad42e}._primary_p2hyj_514:not(:disabled):active{transform:translateY(0)}._secondary_p2hyj_515{background:var(--study-surface,#fff);color:var(--study-accent,#244d7d);border:1px solid var(--study-line,#cddded);box-shadow:0 1px 2px #102b5005}._secondary_p2hyj_515:hover{background:var(--study-surface,#f6f9fe)}._textButton_p2hyj_516{color:var(--study-muted,#5a7597);background:0 0;border:0;min-height:40px;padding:8px 0}._textButton_p2hyj_516:hover{color:var(--study-accent,#175ad4)}._empty_p2hyj_569{text-align:center;justify-items:center;gap:17px;padding:70px 20px;display:grid}._empty_p2hyj_569 svg{color:var(--study-accent,#7ca8df)}._empty_p2hyj_569 p{color:var(--study-muted,#6d8097);font-size:13px}._mobilePicker_p2hyj_583{display:none}._dialog_p2hyj_586{width:100%;max-width:min(90vw,440px);color:var(--study-text,#102b50);background:var(--study-surface,#fff);border:0;border-radius:15px;max-height:85dvh;padding:0}._dialog_p2hyj_586::backdrop{background:var(--study-highlight,#102b5070);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}._dialogHeader_p2hyj_600{border-bottom:1px solid var(--study-line,#dce6f2);justify-content:space-between;align-items:center;padding:15px 20px;display:flex}._dialogHeader_p2hyj_600 button{background:var(--study-surface,#eef4fc);color:var(--study-accent,#244d7d);border:0;border-radius:7px;padding:7px;display:flex}._dialogBody_p2hyj_615{padding:18px 20px}._grammarIntro_p2hyj_618{max-width:720px;color:var(--study-muted,#576e88);font-size:15px;margin-top:13px!important}._comparison_p2hyj_624{grid-template-columns:1fr 1fr;gap:27px;margin-top:31px;display:grid}._comparison_p2hyj_624>div{border-top:2px solid var(--study-line,#a4c7fc);padding-top:17px}._comparison_p2hyj_624>div+div{border-color:var(--study-line,#b8c9d9)}._comparison_p2hyj_624 h3{font-size:20px}._comparison_p2hyj_624 p{color:var(--study-muted,#5c7591);margin-top:8px;font-size:13px}._formula_p2hyj_645{color:var(--study-accent,#275783);background:var(--study-surface,#f3f7fe);border-radius:7px;margin-top:15px;padding:11px 13px;font-size:12px;font-weight:600;line-height:1.65;display:block}._forms_p2hyj_656{border-top:1px solid var(--course-line);margin-top:28px}._formRow_p2hyj_660{border-bottom:1px solid var(--study-line,#edf1f7);grid-template-columns:80px 1fr 1fr;gap:20px;padding:14px 0;font-size:12px;display:grid}._formRow_p2hyj_660>span:first-child{color:var(--study-muted,#5f7692);font-size:11px}._examplesHeading_p2hyj_672{margin-top:33px!important;margin-bottom:17px!important}._contrastRow_p2hyj_676{border-top:1px solid var(--course-line);grid-template-columns:125px 1fr;gap:22px;padding:18px 0;display:grid}._contrastRow_p2hyj_676>span{color:var(--study-muted,#6a83a0);padding-top:4px;font-size:11px}._contrastPair_p2hyj_688{grid-template-columns:1fr 1fr;gap:22px;display:grid}._contrastPair_p2hyj_688 p{font-size:14px;line-height:1.8}._contrastRow_p2hyj_676 small{color:var(--study-muted,#54789e);grid-column:1/-1;margin-top:9px;font-size:11px;display:block}._mistakes_p2hyj_704{border-top:1px solid var(--course-line);margin-top:22px;padding-top:22px}._mistake_p2hyj_704{grid-template-columns:18px 1fr;gap:5px 10px;margin-top:17px;font-size:13px;display:grid}._mistake_p2hyj_704 svg{color:var(--study-text-warm,#bb6a64);margin-top:4px}._mistake_p2hyj_704 svg+del{color:var(--study-muted,#8a7780);-webkit-text-decoration-color:var(--study-text-warm,#ce9e9e);text-decoration-color:var(--study-text-warm,#ce9e9e)}._mistake_p2hyj_704 svg:nth-of-type(2){color:var(--study-text-green,#2d8a6d)}._mistake_p2hyj_704 small{grid-column:2;font-size:11px}._grammarBottom_p2hyj_731{border-top:1px solid var(--course-line);justify-content:flex-end;margin-top:28px;padding-top:24px;display:flex}._quizLayout_p2hyj_738{grid-template-columns:270px minmax(0,1fr);padding-top:25px;display:grid}._quizRail_p2hyj_743{border-right:1px solid var(--course-line);padding:0 26px 0 0}._quizRail_p2hyj_743 h2{margin-top:23px;font-size:21px}._quizRail_p2hyj_743>p{color:var(--study-muted,#6f83a0);margin-top:6px;font-size:12px}._quizProgress_p2hyj_756{color:var(--study-muted,#627d9a);gap:10px;margin-top:25px;font-size:11px;display:grid}._quizProgress_p2hyj_756 progress{width:100%;height:3px;accent-color:var(--study-accent,#175ad4)}._questionMap_p2hyj_768{flex-wrap:wrap;gap:7px;margin-top:21px;display:flex}._questionMap_p2hyj_768 button{border:1px solid var(--study-line,#d5e2f2);background:var(--study-surface,#fff);width:31px;height:32px;color:var(--study-muted,#6380a0);border-radius:7px;font-size:11px}._questionMap_p2hyj_768 button[data-state=correct]{background:var(--study-surface,#eef8f2);color:var(--study-text-green,#21815c);border-color:var(--study-line-green,#c5e6d2)}._questionMap_p2hyj_768 button[data-state=wrong]{background:var(--study-surface-warm,#fff4e7);color:var(--study-text-warm,#9d6b28);border-color:var(--study-line-warm,#efd6b0)}._questionMap_p2hyj_768 button[aria-current=step]{border-color:var(--study-line,#175ad4);color:var(--study-accent,#175ad4);box-shadow:0 0 0 1px #175ad4}._questionArea_p2hyj_798{max-width:900px;padding:17px 0 30px 54px}._questionMeta_p2hyj_802{color:var(--study-muted,#58779b);letter-spacing:.1em;justify-content:space-between;gap:15px;margin-bottom:29px;font-size:10px;display:flex}._questionMeta_p2hyj_802 span+span{letter-spacing:0}._questionArea_p2hyj_798>h2{letter-spacing:-.025em;max-width:750px;font-size:clamp(21px,2.2vw,28px);line-height:1.65}._options_p2hyj_820{border:0;gap:10px;min-width:0;margin:27px 0 0;padding:0;display:grid}._option_p2hyj_820{border:1px solid var(--study-line,#d5e2f1);cursor:pointer;border-radius:10px;align-items:center;gap:13px;min-height:57px;padding:13px 17px;font-size:14px;transition:border-color .15s,background .15s,box-shadow .15s;display:flex;position:relative}._option_p2hyj_820:hover{border-color:var(--study-line,#96b9eb);background:var(--study-surface,#fafcff)}._option_p2hyj_820 input{opacity:0;width:1px;height:1px;position:absolute}._option_p2hyj_820:has(input:focus-visible){outline:3px solid var(--study-line,#8fbaff);outline-offset:3px}._optionLetter_p2hyj_858{border:1px solid var(--study-line,#d5e2f1);width:25px;height:25px;color:var(--study-muted,#58789e);border-radius:6px;flex-shrink:0;place-items:center;font-size:10px;display:grid}._option_p2hyj_820[data-selected=true]{background:var(--study-surface,#f0f6ff);border-color:var(--study-line,#6598ee);box-shadow:0 0 0 1px #6598ee22}._option_p2hyj_820[data-selected=true] 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button{width:27px;min-width:27px;height:29px}._surface_p2hyj_1[data-session=true] ._questionArea_p2hyj_798{padding-top:23px}._surface_p2hyj_1[data-session=true] ._quizRail_p2hyj_743>h2{font-size:17px}._surface_p2hyj_1[data-session=true] ._questionMeta_p2hyj_802{margin-bottom:15px}}._quizProgress_p2hyj_756 progress{-webkit-appearance:none;appearance:none;background:var(--study-surface,#e9f0fa);border:0;border-radius:4px;overflow:hidden}._quizProgress_p2hyj_756 progress::-webkit-progress-bar{background:var(--study-surface,#e9f0fa)}._quizProgress_p2hyj_756 progress::-webkit-progress-value{background:var(--study-solid,#175ad4)}._quizProgress_p2hyj_756 progress::-moz-progress-bar{background:var(--study-solid,#175ad4)}@media (max-width:679px){._options_p2hyj_820:disabled ._option_p2hyj_820:not([data-result]){display:none}._options_p2hyj_820:disabled{gap:8px}._feedback_p2hyj_897{margin-top:16px}._dialogBody_p2hyj_615{height:65dvh;overflow:hidden}._dialog_p2hyj_586 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