/* Ported from nail-implementation-package/apps/player/styles.css — tokens in shared */

:root{
  --surface:var(--panel,#fff);
  --raised:var(--panel,#fff);
  --teal:#0b746f;
  --warm:#f8f0e5;
  --orange:#c66a00;
  --danger:var(--red);
  --danger-soft:var(--red-soft);
  --success-soft:var(--green-soft);
}
.media-stage{width:100%;aspect-ratio:16/9;border-radius:18px;background:#111317;overflow:hidden;display:grid;place-items:center;color:rgba(255,255,255,.7);box-shadow:0 18px 45px rgba(16,22,31,.14)}
.player-main{min-height:calc(100vh - 72px)}
.alert-error{margin:40px auto;max-width:520px;padding:24px;border-radius:16px;background:var(--danger-soft);color:var(--danger);border:1px solid #edc4c7}
.alert-error .alert-title{margin:0;font-weight:800;color:var(--ink)}
.alert-error .mono{margin-top:8px;font-size:12px;color:var(--muted)}
.alert-error .button{margin-top:14px}
.muted{color:var(--muted)}
*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--ink);font-size:14px;line-height:1.45}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}.nail-app{min-height:100vh}.appbar{position:sticky;z-index:50;top:0;height:72px;display:grid;grid-template-columns:minmax(255px,1fr) auto minmax(255px,1fr);align-items:center;padding:0 34px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.92);backdrop-filter:blur(18px)}.brand-zone{min-width:0;display:flex;align-items:center;gap:14px}.brand{width:174px;height:50px;display:flex;align-items:center;flex:0 0 auto;border:0;background:transparent;padding:0}.brand img{width:166px;height:42px;object-fit:contain;object-position:left center}.product-nav{height:34px;display:inline-flex;align-items:center;gap:7px;padding:0 11px;border:1px solid #ead4b5;border-radius:10px;background:#fffdf9;color:#8f4d00;font-size:12px;font-weight:720}.product-nav i{width:6px;height:6px;border-radius:50%;background:#e78000}.product-nav[aria-current=page]{border-color:#d99a4b;background:#fff7eb;color:#6f3a00}.main-nav{height:100%;display:flex;justify-content:center;gap:34px}.main-nav button{position:relative;height:100%;padding:0 2px;border:0;background:transparent;color:var(--muted);font-weight:620}.main-nav button::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:transparent}.main-nav button[aria-current=page]{color:var(--ink)}.main-nav button[aria-current=page]::after{background:var(--ink)}.nail-app[data-has-video=false] [data-requires-video]{display:none}.header-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px}.edit-toggle{height:38px;display:inline-flex;align-items:center;gap:7px;padding:0 12px;border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--muted);font-size:12px;font-weight:680}.edit-toggle[aria-pressed=true]{border-color:#b8cdf2;background:var(--blue-soft);color:var(--blue)}.language{display:flex;align-items:center;gap:3px;padding:4px;border:1px solid var(--line);border-radius:13px;background:#f8f9fa}.language::before{content:"文";display:grid;place-items:center;width:24px;color:var(--blue);font-size:15px}.language button{min-width:34px;height:32px;padding:0 8px;border:0;border-radius:9px;background:transparent;color:var(--muted);font-size:11px;font-weight:780;letter-spacing:.04em}.language button[aria-pressed=true]{background:var(--ink);color:white;box-shadow:0 2px 7px rgba(0,0,0,.13)}
.system-state{min-height:calc(100vh - 72px);display:grid;place-content:center;justify-items:center;color:var(--muted)}.system-state h1{color:var(--ink)}.spinner{width:26px;height:26px;border:3px solid var(--line);border-top-color:var(--blue);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.screen{min-height:calc(100vh - 72px)}.page{width:min(1440px,100%);margin:auto;padding:30px 38px 56px}.eyebrow{display:block;margin-bottom:6px;color:var(--muted);font-size:11px;font-weight:780;letter-spacing:.09em;text-transform:uppercase}.button{min-height:40px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 15px;border:1px solid var(--line);border-radius:11px;background:var(--surface);font-weight:680}.button.primary{border-color:var(--ink);background:var(--ink);color:white}.play-glyph{font-size:10px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:14px}.section-heading h2{margin:0;font-size:22px;letter-spacing:-.02em}.section-heading>span{color:var(--muted)}
.collection-page{max-width:1240px}.collection-hero{min-height:300px;display:grid;grid-template-columns:minmax(0,1fr) 390px;align-items:center;gap:40px;margin-bottom:30px;padding:42px;border-radius:22px;background:linear-gradient(130deg,#16384f,#215d65 58%,#687968);color:#fff;overflow:hidden}.collection-hero .eyebrow{color:rgba(255,255,255,.7)}.collection-hero h1{max-width:720px;margin:0 0 13px;font-size:clamp(36px,4vw,54px);line-height:1.04;letter-spacing:-.045em}.collection-hero p{max-width:720px;margin:0 0 24px;color:rgba(255,255,255,.78);font-size:16px}.collection-hero .button{background:#fff;color:#17363d;border:0}.hero-art{position:relative;height:230px;border-radius:18px;background:linear-gradient(145deg,rgba(255,255,255,.16),rgba(255,255,255,.02));overflow:hidden}.hero-art span:nth-child(1){position:absolute;width:220px;height:220px;border-radius:50%;right:-30px;top:-55px;background:rgba(255,255,255,.12)}.hero-art span:nth-child(2){position:absolute;width:160px;height:160px;border-radius:50%;left:30px;bottom:-80px;background:rgba(137,213,192,.22)}.hero-art span:nth-child(3){position:absolute;left:50%;top:50%;width:74px;height:142px;transform:translate(-50%,-48%) rotate(10deg);border-radius:13px 13px 25px 25px;background:rgba(255,255,255,.87);box-shadow:0 20px 45px rgba(0,0,0,.17)}.video-row{overflow:hidden;border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:0 8px 24px rgba(18,24,35,.04)}.video-row-main{width:100%;display:grid;grid-template-columns:48px 146px minmax(0,1fr) 82px;align-items:center;gap:16px;padding:14px;border:0;background:transparent;text-align:left}.video-index{color:var(--muted);font-size:12px;font-weight:720}.video-thumb{height:78px;display:grid;place-items:center;border-radius:11px;background:linear-gradient(135deg,#17222a,#315964);color:white}.video-thumb .play-glyph{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:rgba(255,255,255,.15)}.video-copy{min-width:0}.video-copy strong{display:block;margin-bottom:5px;font-size:18px}.video-copy small{display:block;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.row-action{justify-self:end;color:var(--blue);font-weight:720}.video-disclosure{width:100%;height:40px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border:0;border-top:1px solid var(--line);background:#fbfbfc;color:var(--muted);font-size:12px;font-weight:670}.video-disclosure[aria-expanded=true] span:last-child{transform:rotate(180deg)}.video-description{padding:18px 22px 22px;border-top:1px solid var(--line)}.video-description>p{max-width:900px;margin:0;color:#424a54}.glossary{display:grid;grid-template-columns:90px 1fr;gap:12px;margin-top:16px!important;color:var(--muted)!important;font-size:12px}.glossary span:first-child{font-weight:760;text-transform:uppercase;letter-spacing:.05em}
.product-page{width:min(1440px,100%);margin:auto;padding:36px 38px 72px}.product-hero{min-height:520px;display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,.9fr);align-items:center;gap:64px;padding:56px 64px;border-radius:26px;background:linear-gradient(135deg,#0d2838,#174e58 58%,#61766b);color:#fff;overflow:hidden}.product-hero .eyebrow{color:#a9d7ce}.product-hero h1{max-width:690px;margin:0 0 18px;font-size:clamp(44px,5.2vw,72px);line-height:.99;letter-spacing:-.055em}.product-hero-copy>p{max-width:630px;margin:0 0 28px;color:rgba(255,255,255,.77);font-size:18px}.product-cta{border:0;background:#fff;color:#17363d}.product-hero-visual{position:relative;padding:20px 0 34px}.product-visual-frame{position:relative;aspect-ratio:16/10;padding:11px;border:1px solid rgba(255,255,255,.2);border-radius:21px;background:rgba(255,255,255,.09);box-shadow:0 30px 70px rgba(0,0,0,.25);overflow:hidden}.product-visual-frame img{width:100%;height:100%;display:block;border-radius:13px;background:#10151a;object-fit:contain}.product-visual-play{position:absolute;left:50%;top:50%;width:54px;height:54px;display:grid;place-items:center;border:1px solid rgba(255,255,255,.35);border-radius:50%;background:rgba(13,20,25,.65);transform:translate(-50%,-50%);font-size:14px}.product-visual-tags{position:absolute;left:34px;right:34px;bottom:4px;display:flex;justify-content:center;gap:8px}.product-visual-tags span{padding:7px 11px;border:1px solid rgba(255,255,255,.18);border-radius:999px;background:rgba(16,31,38,.78);color:rgba(255,255,255,.84);font-size:11px}.guide-section{padding:72px 0}.product-section-heading{max-width:700px;margin-bottom:28px}.product-section-heading h2,.business-copy h2{margin:0 0 10px;font-size:clamp(30px,3.3vw,46px);line-height:1.08;letter-spacing:-.04em}.product-section-heading>p,.business-copy>p{margin:0;color:var(--muted);font-size:16px}.guide-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.guide-grid article{min-height:248px;padding:22px;border:1px solid var(--line);border-radius:18px;background:#fff}.guide-grid article>span{display:block;color:#a0a7af;font-size:11px;font-weight:760}.guide-icon{width:42px;height:42px;display:grid;place-items:center;margin:36px 0 20px;border-radius:12px;background:var(--blue-soft);color:var(--blue);font-size:16px;font-weight:760}.guide-grid h3{margin:0 0 7px;font-size:19px}.guide-grid p{margin:0;color:var(--muted)}.business-section{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(420px,.95fr);gap:64px;padding:54px 58px;border:1px solid var(--line);border-radius:24px;background:#fff}.business-copy>p+p{margin-top:15px}.product-flow{margin:0;padding:0;list-style:none}.product-flow li{display:grid;grid-template-columns:42px 1fr;gap:15px;padding:18px 0;border-bottom:1px solid var(--line)}.product-flow li:first-child{padding-top:2px}.product-flow li:last-child{border-bottom:0}.product-flow li>span{width:38px;height:38px;display:grid;place-items:center;border-radius:50%;background:#172b36;color:#fff;font-size:12px;font-weight:760}.product-flow strong{font-size:15px}.product-flow p{margin:4px 0 0;color:var(--muted)}
.product-strip{position:relative;min-height:44px;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:18px;margin-bottom:22px;padding:9px 13px;border:1px solid #ead4b5;border-radius:12px;background:#fffdf9}.product-strip>span{min-width:0;display:flex;align-items:baseline;gap:9px;white-space:nowrap;overflow:hidden}.product-strip i{width:6px;height:6px;flex:0 0 auto;border-radius:50%;background:#e78000}.product-strip small{overflow:hidden;color:var(--muted);text-overflow:ellipsis}.product-strip>button{border:0;background:transparent;color:#ae5b00;font-weight:720}.product-popover{position:absolute;z-index:20;right:0;top:52px;width:min(410px,90vw);padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--raised);box-shadow:var(--shadow)}.product-popover p{margin:6px 0 0;color:var(--muted)}.breadcrumb{margin-bottom:11px;color:var(--muted);font-size:13px}.title-row{display:flex;align-items:end;justify-content:space-between;margin-bottom:24px}.title-row h1,.workspace-head h1{margin:0 0 5px;font-size:clamp(30px,3.2vw,44px);line-height:1.06;letter-spacing:-.045em}.title-row p{margin:0;color:var(--muted);font-size:15px}.video-layout{display:grid;grid-template-columns:minmax(0,1.72fr) minmax(340px,.72fr);gap:22px;align-items:start}.video-media-stack{min-width:0}.video-slot,.workspace-video-slot{width:100%;aspect-ratio:16/9;border-radius:18px;background:#111317;overflow:hidden;box-shadow:0 18px 45px rgba(16,22,31,.14)}.video-stage{position:relative;width:100%;height:100%;background:#111317;overflow:hidden}.video-stage video{display:block;width:100%;height:100%;object-fit:contain;background:#111317}.jump-flash{position:absolute;inset:0;pointer-events:none;border:0 solid rgba(64,137,255,0);box-shadow:inset 0 0 0 0 rgba(64,137,255,0)}.jump-flash.is-active{animation:jumpFlash .72s ease-out}@keyframes jumpFlash{0%{border:4px solid rgba(65,133,255,.9);box-shadow:inset 0 0 32px rgba(65,133,255,.38)}100%{border:4px solid rgba(65,133,255,0);box-shadow:inset 0 0 0 rgba(65,133,255,0)}}
.caption-panel{position:relative;margin-top:12px;padding:13px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.caption-head{display:flex;align-items:center;justify-content:space-between}.caption-panel>p,.workspace-caption-panel>p{min-height:25px;margin:6px 0 0;color:#3c444d;font-size:18px;line-height:1.45}.caption-panel>p span,.workspace-caption-panel>p span{display:inline;padding:2px 4px;border-radius:4px;box-decoration-break:clone;-webkit-box-decoration-break:clone}.workspace-caption-panel{margin-top:12px;padding:11px 13px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.workspace-caption-panel>strong{font-size:12px}.workspace-caption-panel>p{font-size:16px}.quiet-button{height:30px;display:inline-flex;align-items:center;gap:6px;padding:0 9px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--muted);font-size:12px}.caption-settings{position:absolute;z-index:25;right:0;top:48px;width:330px;display:grid;grid-template-columns:1fr 1fr;gap:13px;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--raised);box-shadow:var(--shadow)}.caption-settings label{display:grid;gap:5px;color:var(--muted);font-size:11px;font-weight:680}.caption-settings label:nth-child(2){grid-column:1/-1}.caption-settings select,.caption-settings input[type=color]{height:34px;border:1px solid var(--line);border-radius:8px;background:#fff}.caption-settings input[type=color]{width:100%;padding:3px}.caption-settings .check{display:flex;flex-direction:row;align-items:center;gap:7px}.caption-settings input[type=range]{width:100%}
.chapters-panel{height:720px;min-height:0;display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line);border-radius:18px;background:var(--surface)}.video-side-tabs{flex:0 0 auto;display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:6px;border-bottom:1px solid var(--line);background:#f5f6f8}.video-side-tabs button{height:36px;border:0;border-radius:9px;background:transparent;color:var(--muted);font-size:12px;font-weight:720}.video-side-tabs button[aria-selected=true]{background:#fff;color:var(--ink);box-shadow:0 2px 8px rgba(17,24,39,.08)}.video-side-pane{min-height:0;display:flex;flex:1;flex-direction:column}.panel-head{display:flex;flex:0 0 auto;align-items:start;justify-content:space-between;gap:12px;padding:20px 20px 14px;border-bottom:1px solid var(--line)}.panel-head h2{margin:0 0 4px;font-size:22px;letter-spacing:-.025em}.panel-head p{margin:0;color:var(--muted);font-size:12px}.follow-toggle{display:flex;align-items:center;gap:7px;white-space:nowrap;color:var(--muted);font-size:11px}.follow-toggle input{accent-color:var(--teal)}.chapters-list,.slide-text-list{min-height:0;flex:1;overflow:auto;scrollbar-gutter:stable}.slide-text-list{display:grid;align-content:start;gap:9px;padding:12px;background:#fafbfc}.slide-text-card{padding:15px;border:1px solid var(--line);border-radius:12px;background:#fff;transition:border-color .18s ease,background .18s ease,box-shadow .18s ease}.slide-text-card.is-video-active{border-color:#b8cdf2;background:#f6f9ff;box-shadow:inset 3px 0 0 var(--blue)}.slide-text-card-head{display:grid;grid-template-columns:1fr 29px;align-items:start;gap:10px;margin-bottom:9px}.slide-text-card-head h3{margin:2px 0 0;font-size:14px;line-height:1.35}.slide-text-card .image-i2t{color:#424b55;font-size:12px}.slide-text-card .image-i2t h3,.slide-text-card .image-i2t h4,.slide-text-card .image-i2t h5{font-size:13px}.chapter{border-bottom:1px solid var(--line)}.chapter:last-child{border-bottom:0}.chapter-title{width:100%;display:grid;grid-template-columns:28px 1fr 20px;align-items:start;gap:8px;padding:15px 18px;border:0;background:transparent;text-align:left}.chapter-title:hover{background:#fafbfc}.chapter.is-active>.chapter-title{background:#f6f9ff}.chapter-number{width:24px;height:24px;display:grid;place-items:center;border-radius:50%;background:var(--soft);color:var(--muted);font-size:10px;font-weight:760}.chapter.is-active .chapter-number{background:var(--blue);color:white}.chapter-title strong{font-size:13px;line-height:1.35}.chapter-title>span:last-child{color:var(--muted)}.chapter-body{padding:0 18px 18px 54px}.chapter-body>p{margin:0 0 14px;color:#4e5762;font-size:13px}.chapter-actions{display:flex;align-items:center;gap:7px;margin-bottom:14px}.play-button{width:29px;height:29px;display:inline-grid;place-items:center;flex:0 0 auto;border:1px solid #cddaf0;border-radius:50%;background:var(--blue-soft);color:var(--blue);font-size:9px}.play-button:hover{border-color:var(--blue);transform:translateY(-1px)}.chapter-layers{display:flex;gap:5px;margin-bottom:10px}.chapter-layers button,.learning-tabs button,.practice-levels button{border:0;background:transparent}.chapter-layers button{height:29px;padding:0 9px;border-radius:8px;color:var(--muted);font-size:11px;font-weight:710}.chapter-layers button[aria-selected=true]{background:var(--soft);color:var(--ink)}.chapter-learning{display:grid;gap:8px}.chapter-learning-row,.learning-row{display:grid;grid-template-columns:1fr 30px;align-items:start;gap:10px}.chapter-learning-row p{margin:0;color:#4c5560;font-size:12px}
.timeline{margin-top:12px;padding:13px 15px 12px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.timeline-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:10px}.timeline-label{min-width:0;display:flex;align-items:center;gap:8px}.timeline-label strong{font-size:12px}.timeline-label span{min-width:0;color:var(--muted);font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.auto-stop{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:11px;white-space:nowrap}.auto-stop input{accent-color:var(--blue)}.timeline-track{position:relative;height:34px}.timeline-base{position:absolute;left:0;right:0;top:16px;height:4px;border-radius:6px;background:#dfe4ea}.timeline-range{position:absolute;top:14px;height:8px;min-width:3px;border-radius:7px;background:var(--blue);box-shadow:0 0 0 2px rgba(23,92,211,.08)}.timeline-playhead{position:absolute;z-index:4;top:6px;width:2px;height:24px;background:var(--green);transform:translateX(-1px);transition:left .08s linear}.timeline-playhead::before{content:"";position:absolute;left:50%;top:-2px;width:7px;height:7px;border-radius:50%;background:var(--green);transform:translateX(-50%)}.task-marker{position:absolute;z-index:6;top:7px;width:20px;height:20px;margin-left:-10px;border:0;background:transparent}.task-marker::before{content:"";position:absolute;left:6px;top:6px;width:8px;height:8px;border:2px solid #fff;border-radius:50%;background:#26313c;box-shadow:0 0 0 1px rgba(38,49,60,.45)}.task-marker:hover::before,.task-marker:focus-visible::before{background:var(--blue);transform:scale(1.25)}.timeline-scale{display:flex;justify-content:space-between;color:#89919b;font-size:9px}
.learning-section{margin-top:34px;padding:28px;border:1px solid var(--line);border-radius:18px;background:var(--surface)}.video-materials-card{margin:-7px 0 25px;border-bottom:1px solid var(--line)}.video-description-toggle{width:100%;min-height:48px;display:grid;grid-template-columns:130px minmax(0,1fr) auto;align-items:center;gap:14px;padding:0 0 13px;border:0;background:transparent;text-align:left}.video-description-toggle>strong{font-size:13px}.video-description-preview{min-width:0;color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.video-description-action{color:var(--blue);font-size:12px;font-weight:720;white-space:nowrap}.video-description-action i{display:inline-block;margin-left:3px;font-style:normal;transition:transform .18s ease}.video-materials-card.is-open .video-description-action i{transform:rotate(180deg)}.video-materials-details{padding:0 0 20px 144px}.video-description-full{max-width:980px;margin:0;color:#444d57}.video-glossary{display:grid;grid-template-columns:84px minmax(0,1fr);gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}.video-glossary>strong{color:var(--muted);font-size:10px;letter-spacing:.07em;text-transform:uppercase}.video-glossary-list{line-height:1.8}.video-glossary-list button{padding:0;border:0;border-bottom:1px dotted #8f9dad;background:transparent;color:#33404d;font-size:12px}.video-glossary-list button:hover,.video-glossary-list button[aria-pressed=true]{border-bottom-color:var(--blue);color:var(--blue)}.video-glossary-separator{color:#a4abb3}.video-term-detail{display:grid;grid-template-columns:minmax(0,1fr) 29px;align-items:start;gap:14px;margin:15px 0 0 96px;padding:14px 15px;border-radius:12px;background:var(--blue-soft)}.video-term-detail h3{margin:0 0 4px;font-size:14px}.video-term-detail p{margin:0;color:#475668;font-size:13px}.learning-heading{margin-top:0}.learning-tabs{display:flex;gap:7px;margin:18px 0;padding:5px;border-radius:12px;background:var(--soft)}.learning-tabs button{flex:1;min-height:38px;border-radius:9px;color:var(--muted);font-weight:720}.learning-tabs button[aria-selected=true]{background:#fff;color:var(--ink);box-shadow:0 2px 8px rgba(17,24,39,.08)}.learning-list{display:grid;grid-template-columns:1fr 1fr;gap:0 28px}.learning-row{padding:13px 0;border-bottom:1px solid var(--line)}.learning-row p{margin:0;color:#3f4750}.learning-row:nth-last-child(-n+2){border-bottom:0}
.workspace-page{min-height:calc(100vh - 72px);display:grid;grid-template-columns:minmax(350px,32%) minmax(0,1fr)}.workspace-media{position:sticky;top:72px;height:calc(100vh - 72px);padding:24px;border-right:1px solid var(--line);background:#eef1f4;overflow:auto}.back-link{margin-bottom:14px;padding:0;border:0;background:transparent;color:var(--muted);font-size:12px;font-weight:680}.workspace-video-slot{border-radius:14px}.workspace-video-slot.is-fitted{aspect-ratio:auto}.workspace-media .timeline{padding:12px;margin-top:12px}.workspace-media .timeline-head{display:block}.workspace-media .auto-stop{margin-top:8px}.workspace-now{margin-top:14px;padding:12px 14px;border-radius:12px;background:#fff}.workspace-now span{display:block;margin-bottom:3px;color:var(--muted);font-size:10px;font-weight:760;text-transform:uppercase;letter-spacing:.08em}.workspace-now strong{font-size:12px}.workspace-content{min-width:0;padding:30px 36px 60px;background:#fafbfc}.workspace-head{margin-bottom:24px}.workspace-head h1{font-size:31px}.workspace-tabs{display:flex;gap:3px;overflow:auto;border-bottom:1px solid var(--line)}.workspace-tabs button{height:44px;padding:0 15px;border:0;border-bottom:2px solid transparent;background:transparent;color:var(--muted);white-space:nowrap;font-weight:680}.workspace-tabs button[aria-selected=true]{border-bottom-color:var(--ink);color:var(--ink)}.workspace-tabs button:disabled{opacity:.42;cursor:default}.tab-count{display:inline-grid;place-items:center;min-width:20px;height:18px;margin-left:6px;padding:0 5px;border-radius:9px;background:var(--soft);font-size:10px}.workspace-panel{padding-top:24px}.panel-intro{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}.panel-intro h2{margin:0 0 4px;font-size:24px;letter-spacing:-.03em}.panel-intro p{margin:0;color:var(--muted)}
.practice-levels{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:18px}.practice-levels button{min-height:68px;padding:12px 15px;border:1px solid var(--line);border-radius:13px;background:#fff;text-align:left}.practice-levels button span{display:block;color:var(--muted);font-size:11px}.practice-levels button strong{font-size:15px}.practice-levels button[aria-selected=true]{border-color:#aec7f1;background:var(--blue-soft);box-shadow:0 0 0 2px rgba(23,92,211,.05)}.task-types{display:flex;gap:7px;margin-bottom:16px}.task-types button{height:33px;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--muted);font-size:12px;font-weight:680}.task-types button[aria-selected=true]{border-color:var(--ink);background:var(--ink);color:#fff}.task-stack{display:grid;gap:12px}.task-card{border:1px solid var(--line);border-radius:15px;background:#fff;overflow:hidden}.task-card>header{display:grid;grid-template-columns:1fr 32px;align-items:start;gap:12px;padding:17px 18px}.task-card>header h3{margin:0;font-size:16px;line-height:1.35}.task-card>header p{margin:4px 0 0;color:var(--muted);font-size:12px}.task-body{padding:0 18px 18px}.task-body textarea{width:100%;min-height:120px;resize:vertical;padding:12px;border:1px solid var(--line);border-radius:10px;background:#fbfcfd;line-height:1.5}.task-actions{display:flex;align-items:center;gap:8px;margin-top:11px}.feedback{margin-top:12px;padding:12px 14px;border-radius:10px;background:var(--soft)}.feedback.correct{background:var(--success-soft);color:#0d633a}.feedback.wrong{background:var(--danger-soft);color:var(--danger)}.evidence-block,.model-answer{margin-top:12px;padding:14px;border:1px solid var(--line);border-radius:11px;background:#fbfcfd}.evidence-block h4,.model-answer h4{margin:0 0 8px;font-size:12px}.evidence-row{display:grid;grid-template-columns:1fr 29px;align-items:start;gap:10px;padding:8px 0;border-top:1px solid var(--line)}.evidence-row:first-of-type{border-top:0}.evidence-row p{margin:0;color:#4d5661;font-size:12px}.self-rating{margin-top:12px}.self-rating label{display:grid;gap:5px;color:var(--muted);font-size:11px;font-weight:680}.self-rating select{height:38px;padding:0 10px;border:1px solid var(--line);border-radius:9px;background:#fff}.option-list{display:grid;gap:8px}.option{width:100%;display:grid;grid-template-columns:28px 1fr 28px;align-items:center;gap:10px;padding:11px;border:1px solid var(--line);border-radius:11px;background:#fff;text-align:left}.option:hover{border-color:#bdc9d9}.option .letter{width:26px;height:26px;display:grid;place-items:center;border-radius:50%;background:var(--soft);font-size:11px;font-weight:760}.option.is-correct{border-color:#8bc9a8;background:var(--success-soft)}.option.is-wrong{border-color:#e5a29c;background:var(--danger-soft)}.match-list{display:grid;gap:10px}.match-row{display:grid;grid-template-columns:minmax(180px,.8fr) 1.2fr 34px;align-items:center;gap:12px;padding:12px;border:1px solid var(--line);border-radius:11px}.match-row strong{font-size:13px}.match-row select{width:100%;height:38px;padding:0 10px;border:1px solid var(--line);border-radius:8px;background:#fff}.match-status{width:27px;height:27px;display:grid;place-items:center;border-radius:50%;background:var(--soft)}.rubric-list{display:grid;gap:8px;margin-top:13px}.rubric-item{border:1px solid var(--line);border-radius:11px;background:#fff}.rubric-item>button{width:100%;display:flex;justify-content:space-between;gap:12px;padding:12px 13px;border:0;background:transparent;text-align:left;font-weight:680}.rubric-detail{padding:0 13px 13px}.rubric-levels{display:grid;gap:8px}.rubric-level{padding:12px;border-radius:10px;background:var(--soft)}.rubric-level h5{margin:0 0 4px;font-size:12px}.rubric-level p{margin:0 0 7px;color:#4d5660;font-size:12px}.rubric-level details{margin-top:6px}.rubric-level summary{cursor:pointer;color:var(--blue);font-size:11px;font-weight:680}.rubric-level ul{margin:7px 0 0;padding-left:18px;color:#4d5660;font-size:12px}.rubric-level li+li{margin-top:4px}
.text-toolbar,.search-box{display:flex;gap:8px;margin-bottom:16px}.text-toolbar{align-items:center;flex-wrap:wrap}.text-toolbar button{height:33px;padding:0 11px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--muted);font-size:12px}.text-toolbar button[aria-selected=true]{background:var(--ink);color:#fff}.text-follow,.image-follow{display:flex;align-items:center;gap:7px;margin-left:auto;color:var(--muted);font-size:11px;white-space:nowrap}.text-follow input,.image-follow input{accent-color:var(--teal)}.transcript-list,.content-list,.concept-list,.search-results{display:grid;gap:8px}.transcript-list,.chapter-text-list{max-height:calc(100vh - 275px);overflow:auto;padding:2px 5px 2px 2px;scrollbar-gutter:stable}.transcript-row,.content-card,.concept-card,.search-result{display:grid;grid-template-columns:1fr 32px;align-items:start;gap:12px;padding:13px 15px;border:1px solid var(--line);border-radius:12px;background:#fff;transition:border-color .18s ease,background .18s ease,box-shadow .18s ease}.transcript-row p,.content-card p,.concept-card p,.search-result p{margin:0;color:#434c56}.content-card h3,.concept-card h3,.search-result h3{margin:0 0 5px;font-size:14px}.transcript-row.is-video-active,.chapter-text-list .content-card.is-video-active{border-color:#b8cdf2;background:#f6f9ff;box-shadow:inset 3px 0 0 var(--blue)}.concept-aliases{margin-top:6px!important;color:var(--muted)!important;font-size:11px}.search-box input{flex:1;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:11px;background:#fff}.empty-state{padding:36px;border:1px dashed #cbd2da;border-radius:14px;text-align:center;color:var(--muted)}.image-grid{display:grid;grid-template-columns:1fr;gap:18px}.image-card{height:390px;display:grid;grid-template-columns:minmax(360px,.92fr) minmax(420px,1.08fr);border:1px solid var(--line);border-radius:15px;background:#fff;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}.image-card.is-video-active{border-color:#9ebbea;box-shadow:0 0 0 3px rgba(23,92,211,.08)}.image-media{min-width:0;display:flex;align-items:center;justify-content:center;padding:12px;background:#15181d}.image-card img{display:block;width:100%;height:100%;object-fit:contain}.image-text{min-width:0;height:100%;overflow:auto;padding:20px 22px}.image-text-head{position:sticky;z-index:2;top:-20px;display:flex;align-items:start;justify-content:space-between;gap:12px;margin:-20px -22px 14px;padding:20px 22px 12px;background:linear-gradient(#fff 82%,rgba(255,255,255,0))}.image-text h3{margin:0;font-size:18px;line-height:1.3}.image-i2t h3,.image-i2t h4,.image-i2t h5{margin:14px 0 7px;line-height:1.3}.image-i2t h3:first-child,.image-i2t h4:first-child{margin-top:0}.image-i2t p{margin:0 0 9px;color:#414a54}.image-i2t ul,.image-i2t ol{margin:0 0 12px;padding-left:20px}.image-i2t li+li{margin-top:5px}.image-graphic-description{margin:16px 0 0;padding-top:13px;border-top:1px solid var(--line);color:var(--muted);font-size:12px;line-height:1.5}
.task-drawer{position:fixed;z-index:100;inset:0;display:grid;grid-template-columns:1fr minmax(480px,680px)}.drawer-backdrop{background:rgba(14,18,24,.28);backdrop-filter:blur(2px)}.task-drawer>section{height:100vh;overflow:auto;padding:26px;background:#f7f8fa;box-shadow:-24px 0 60px rgba(0,0,0,.18)}.task-drawer>section>header{display:flex;align-items:start;justify-content:space-between;gap:18px;margin-bottom:18px}.task-drawer h2{margin:0;font-size:24px}.close-button{width:36px;height:36px;border:1px solid var(--line);border-radius:50%;background:#fff;font-size:22px}.toast{position:fixed;z-index:120;left:50%;bottom:28px;transform:translateX(-50%);padding:11px 15px;border-radius:10px;background:#17191d;color:#fff;box-shadow:var(--shadow);font-size:12px}.nail-app.is-editing [data-editable]{border-radius:4px;outline:1px dashed rgba(23,92,211,.34);outline-offset:3px;cursor:text}.nail-app.is-editing [data-editable]:hover{outline-color:rgba(23,92,211,.75);background:rgba(234,241,255,.5)}.nail-app.is-editing [data-editable]:focus{outline:2px solid rgba(23,92,211,.75);background:#fff;color:var(--ink);box-shadow:0 0 0 5px rgba(23,92,211,.08)}
[hidden]{display:none!important}:focus-visible{outline:3px solid rgba(23,92,211,.32);outline-offset:2px}@media(min-width:1001px){.video-media-stack.is-sticky-ready{position:sticky;top:92px;align-self:start}}@media(max-width:1200px){.product-hero{grid-template-columns:minmax(0,1fr) minmax(360px,.8fr);gap:42px;padding:48px}.guide-grid{grid-template-columns:repeat(2,1fr)}.image-card{height:auto;min-height:340px;grid-template-columns:minmax(320px,.9fr) minmax(360px,1.1fr)}}@media(max-width:1000px){.appbar{grid-template-columns:250px 1fr auto;padding:0 18px}.brand{width:145px}.brand img{width:140px}.brand-zone{gap:9px}.product-nav{padding:0 9px}.main-nav{gap:18px}.page,.product-page{padding:24px 22px}.product-hero{min-height:auto;grid-template-columns:1fr;padding:42px}.product-hero-visual{max-width:650px}.business-section{grid-template-columns:1fr;gap:38px;padding:42px}.video-layout{grid-template-columns:1fr}.chapters-panel{height:auto}.chapters-list,.slide-text-list{max-height:520px;flex:none}.collection-hero{grid-template-columns:1fr 260px}.workspace-page{grid-template-columns:1fr}.workspace-media{position:relative;top:0;height:auto;border-right:0;border-bottom:1px solid var(--line)}.workspace-video-slot,.workspace-caption-panel{max-width:640px}.workspace-content{padding:26px 22px}.transcript-list,.chapter-text-list{max-height:none;overflow:visible;padding-right:2px}.task-drawer{grid-template-columns:1fr minmax(400px,78vw)}}@media(max-width:760px){.header-actions{gap:6px}.edit-toggle{width:38px;padding:0;justify-content:center}.edit-toggle span:last-child{display:none}.product-hero{padding:32px 26px}.product-hero h1{font-size:42px}.guide-grid{grid-template-columns:1fr}.business-section{padding:32px 26px}.video-description-toggle{grid-template-columns:1fr auto}.video-description-preview{grid-column:1/-1;grid-row:2}.video-materials-details{padding-left:0}.video-glossary{grid-template-columns:1fr}.video-term-detail{margin-left:0}.image-card{height:auto;grid-template-columns:1fr}.image-media{aspect-ratio:16/9}.image-text{max-height:360px}}@media(max-width:700px){.appbar{height:auto;min-height:100px;grid-template-columns:1fr auto;grid-template-rows:58px 42px;padding:0 14px}.main-nav{grid-column:1/-1;grid-row:2}.main-nav button{height:42px}.header-actions{grid-column:2;grid-row:1}.brand-zone{grid-column:1;grid-row:1}.brand{width:126px}.brand img{width:122px}.product-nav{height:30px;font-size:11px}.product-page{padding:18px 14px 52px}.product-hero{border-radius:20px}.product-visual-tags{left:10px;right:10px}.product-visual-tags span{padding:5px 8px}.collection-hero{grid-template-columns:1fr;padding:28px}.hero-art{display:none}.video-row-main{grid-template-columns:34px 88px 1fr}.row-action{display:none}.learning-list{grid-template-columns:1fr}.workspace-tabs button{padding:0 10px}.practice-levels{grid-template-columns:1fr}.match-row{grid-template-columns:1fr}.task-drawer{grid-template-columns:1fr}.drawer-backdrop{display:none}.task-drawer>section{padding:20px}}