/* 심화과정 3차 시안. 몬크의 브랜드 토큰을 유지하고 강의 전용 조판만 적용한다. */
.classroom-preview{margin:0;background:var(--bg);color:var(--text);font:14px/1.6 'SUIT Variable',sans-serif;word-break:keep-all;overflow-wrap:break-word;--class-ink:#182b45;--class-muted:#5f6874;--class-line:#dbe2ec;--class-blue:#a8c7f0}
.classroom-preview *{box-sizing:border-box}.classroom-preview h1,.classroom-preview h2,.classroom-preview h3,.classroom-preview p{margin:0}.classroom-preview button,.classroom-preview select{font:inherit}.classroom-preview button{cursor:pointer}.classroom-preview a{color:inherit;text-decoration:none}.classroom-preview svg{width:20px;height:20px;flex-shrink:0}.classroom-preview [hidden]{display:none!important}.classroom-preview :focus-visible{outline:3px solid #658bc1;outline-offset:4px}.classroom-preview ::selection{background:#cbdcf2;color:#142c52}.classroom-preview button:disabled{cursor:default;color:#5f6874;background:#eff3f9}.classroom-preview progress{display:block;width:100%;height:4px;border:0;overflow:hidden;appearance:none;background:#e4ebf5}.classroom-preview progress::-webkit-progress-bar{background:#e4ebf5}.classroom-preview progress::-webkit-progress-value{background:#1b3a6b}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.preview-note{height:30px;display:flex;justify-content:center;align-items:center;gap:12px;font-size:12px;color:var(--class-muted);border-bottom:1px solid #e4ebf5}.preview-note>span{font-weight:400}.room-shell{max-width:1224px;margin:auto;padding:30px 40px 64px}.course-brand{display:flex;justify-content:space-between;align-items:center;color:#1b3a6b;font-size:12px;letter-spacing:.04em}.course-brand b{font-weight:400;margin-left:10px;padding-left:10px;border-left:1px solid #aab4c1}.course-brand>span:last-child{font-weight:800;letter-spacing:.12em}.room-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;padding:35px 0 28px}.room-heading h1{font-size:42px;line-height:1.3;font-weight:800;letter-spacing:-.04em}.room-heading p{font-size:15px;color:var(--class-muted);margin-top:10px}.filter-tabs{display:flex;gap:24px;align-self:end;flex-shrink:0}.filter-tabs button{display:flex;gap:9px;align-items:center;min-height:48px;padding:0 2px;border:0;border-bottom:2px solid transparent;background:none;color:var(--class-muted);font-weight:700}.filter-tabs button[aria-pressed=true]{color:#1b3a6b;border-bottom-color:#1b3a6b}.filter-tabs span{font-size:12px}.course-card{min-width:0}.recent{display:grid;grid-template-columns:1.04fr 1fr;gap:48px;padding:32px 0 42px;border-top:1px solid var(--class-line);border-bottom:1px solid var(--class-line)}.course-cover{position:relative;overflow:hidden;border-radius:var(--radius-xs);background:#182b45;color:#fff;isolation:isolate}.intermediate{min-height:380px}.course-content{display:flex;flex-direction:column;justify-content:center;padding:8px 0;min-width:0}.course-topline{display:flex;gap:16px;align-items:center;justify-content:space-between}.course-level{font-size:12px;color:#1b3a6b;font-weight:700}.course-period{font-size:12px;color:#1b3a6b;border:1px solid #b4c3d6;border-radius:999px;padding:3px 10px}.course-content h2{font-size:32px;line-height:1.35;letter-spacing:-.04em;margin-top:14px;font-weight:800}.course-description{font-size:15px;color:var(--class-muted);margin-top:12px!important;line-height:1.7}.course-progress{margin-top:25px}.progress-label{display:flex;justify-content:space-between;font-size:12px;color:var(--class-muted);margin-bottom:8px}.progress-label>span:last-child{color:#1b3a6b;font-weight:700}.resume-context{margin:20px 0 14px}.resume-context>span{font-size:12px;color:var(--class-muted)}.resume-context p{font-size:14px;font-weight:700;margin-top:4px}.resume-context small{font-size:12px;font-weight:400;color:var(--class-muted);margin-left:8px;white-space:nowrap}.resume-action{min-height:56px;display:flex;gap:12px;align-items:center;padding:12px 20px;background:#1b3a6b;color:#fff!important;border-radius:var(--radius-xs);transition:background .2s}.resume-action:hover{background:#142c52}.resume-action>svg:first-child{width:16px;height:16px}.resume-action>svg:last-child{margin-left:auto}.resume-action strong{font-size:16px;font-weight:700}.course-until{font-size:12px;color:var(--class-muted);text-align:right;margin-top:10px!important}.secondary{display:grid;grid-template-columns:210px minmax(0,1fr) auto;align-items:center;gap:28px;padding:32px 0;border-bottom:1px solid var(--class-line)}.secondary .course-cover{height:146px}.secondary-content .course-topline{justify-content:start;gap:12px}.secondary h2{font-size:22px;line-height:1.4;letter-spacing:-.03em;margin-top:8px}.secondary .course-description{font-size:14px;margin-top:5px!important}.unstarted{font-size:12px;color:var(--class-muted)}.secondary-meta{font-size:12px;color:var(--class-muted);margin-top:14px!important}.secondary-meta span{margin:0 7px}.start-action{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:48px;color:#1b3a6b!important;font-weight:700;padding:8px 0}.start-action svg{width:18px}.start-action:hover{color:#142c52;text-decoration:underline;text-underline-offset:5px}.expired-record{padding:32px 0;border-top:1px solid var(--class-line);border-bottom:1px solid var(--class-line)}.expired-record h2{font-size:26px;margin:12px 0}.expired-record .start-action{max-width:200px;margin-top:20px}.room-note{margin-top:22px!important;color:var(--class-muted);font-size:12px}.preview-footer{display:flex;align-items:center;justify-content:center;gap:16px;border-top:1px solid var(--class-line);padding:26px 20px;font-size:14px;font-weight:800;color:#1b3a6b;letter-spacing:.08em}.preview-footer span{font-size:12px;font-weight:400;letter-spacing:0;color:var(--class-muted)}
/* 시청 화면: 영상의 조작 영역과 목차의 읽는 영역을 구분한다. */
.watch-shell{max-width:1440px;margin:auto;padding:0 40px 50px}.watch-path{min-height:70px;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--class-muted);gap:16px}.watch-path a{min-height:44px;display:flex;align-items:center;gap:6px;color:#1b3a6b;font-weight:700}.watch-path svg{width:16px}.watch-context{display:flex;align-items:center;gap:16px}.watch-context b{font-weight:700;color:#1b3a6b;padding-left:16px;border-left:1px solid var(--class-line)}.watch-grid{display:grid;grid-template-columns:minmax(0,1fr) 332px;column-gap:32px;align-items:start}.player-wrap{grid-column:1;grid-row:1;background:#182b45;color:#f1f4f8;min-width:0;border-radius:var(--radius-xs);overflow:hidden}.video-stage{position:relative;isolation:isolate;aspect-ratio:16/9;background:#eef2f7;overflow:hidden}.lesson-image{position:absolute;inset:0 0 0 auto;width:52%;height:100%;object-fit:cover;object-position:57% center;filter:saturate(.55)}.slide-top{position:absolute;inset:6% 5% auto;display:flex;justify-content:space-between;align-items:center;color:#182b45}.slide-top>span:first-child{font-size:17px;font-weight:800;letter-spacing:.03em}.slide-top small{display:block;font-size:12px;font-weight:400;letter-spacing:.05em;margin-top:2px}.slide-top>span:last-child{font-size:12px;color:#fff;background:#182b45de;padding:4px 8px;border-radius:var(--radius-xs)}.lesson-slide{position:absolute;left:5%;top:35%;width:38%;color:#182b45}.lesson-slide>span{font-size:12px;font-weight:700;color:#1b3a6b}.lesson-slide h1{font-size:30px;font-weight:800;line-height:1.35;letter-spacing:-.04em;margin-top:10px;color:#182b45}.lesson-slide p{font-size:13px;color:#435269;margin-top:18px;line-height:1.7}.stage-play{position:absolute;left:72%;top:47%;transform:translate(-50%,-50%);width:56px;height:56px;border-radius:50%;background:#fff;border:0;color:#1b3a6b;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 24px #172a4733}.stage-play svg{width:20px;height:20px}.playback{padding:0 20px 12px}.timeline{display:flex;align-items:center;gap:12px;font-size:12px;font-variant-numeric:tabular-nums;color:#d5e4f7}.timeline input{min-width:0;flex:1;min-height:44px;margin:0;accent-color:#a8c7f0;cursor:pointer}.transport{display:flex;align-items:center;gap:8px}.transport button{min-width:44px;min-height:44px;padding:0 8px;color:#e4ebf5;background:none;border:0;border-radius:var(--radius-xs);display:flex;align-items:center;justify-content:center;gap:4px}.transport button:hover{background:#314a6b}.transport #play-toggle{background:#fff;color:#1b3a6b;border-radius:50%;width:44px;padding:0}.transport #play-toggle svg{width:18px;height:18px}.transport>button:not(.transport-play){flex-direction:column;gap:0;font-size:12px}.transport>button svg{width:17px;height:17px}.transport-options{display:flex;gap:12px;margin-left:auto;align-items:center}.speed-label select{min-height:44px;font-size:16px;padding:0 8px;background:#314a6b;color:#fff;border:0;border-radius:var(--radius-xs);max-width:78px}.transport-options #repeat-toggle{font-size:12px;min-width:76px;gap:6px}.transport-options #repeat-toggle svg{width:17px}.transport-options #repeat-toggle[aria-expanded=true]{background:#314a6b}.repeat-panel{padding:16px 0 4px;font-size:12px;color:#e4ebf5}.repeat-actions{display:flex;gap:8px;margin:10px 0}.repeat-actions button{min-height:44px;min-width:44px;border:1px solid #a8c7f0;border-radius:var(--radius-xs);color:#fff;background:none;padding:8px 12px}.repeat-actions button:last-child{margin-left:auto;border:0}.lesson-info{grid-row:2;grid-column:1;padding:26px 0;border-bottom:1px solid var(--class-line)}.lesson-title-row{display:flex;align-items:center;justify-content:space-between;gap:16px}.lesson-title-row>div{min-width:0}.lesson-title-row p{font-size:12px;color:#1b3a6b}.lesson-title-row h2{font-size:26px;font-weight:800;line-height:1.4;letter-spacing:-.035em;margin-top:6px}.next-lesson{width:44px;height:44px;flex-shrink:0;border-radius:50%;display:flex;align-items:center;justify-content:center;border:1px solid #798798;color:#1b3a6b;background:white}.lesson-meta{font-size:12px;color:var(--class-muted);margin-top:8px!important}.learning-tabs{display:none;gap:24px;grid-column:1;grid-row:3;border-bottom:1px solid var(--class-line)}.learning-tabs button{display:flex;align-items:center;gap:8px;min-height:52px;background:none;border:0;border-bottom:2px solid transparent;color:var(--class-muted);padding:0;font-weight:700}.learning-tabs button[aria-selected=true]{color:#1b3a6b;border-color:#1b3a6b}.learning-tabs span{font-size:12px}.lesson-panel{grid-column:2;grid-row:1/5;min-width:0;border:1px solid var(--class-line);border-radius:var(--radius-xs);overflow:hidden}.list-course{padding:24px;background:#f4f7fc}.list-course>span{font-size:12px;color:#1b3a6b;font-weight:700}.list-course h2{font-size:23px;font-weight:800;letter-spacing:-.035em;margin-top:8px}.list-course p{font-size:12px;color:var(--class-muted);margin-top:6px}.list-heading{display:flex;align-items:center;justify-content:space-between;padding:22px 20px 16px}.list-heading h2{font-size:14px;font-weight:700}.list-heading span{font-size:12px;color:var(--class-muted)}.chapter{border-top:1px solid var(--class-line)}.chapter>summary{display:flex;gap:10px;align-items:center;list-style:none;min-height:64px;padding:16px;cursor:pointer;font-weight:700;font-size:14px}.chapter>summary::-webkit-details-marker,.completed-lessons>summary::-webkit-details-marker{display:none}.chapter>summary span:first-child{font-size:12px;color:var(--class-muted)}.chapter>summary small{margin-left:auto;font-size:12px;color:var(--class-muted);font-weight:400;white-space:nowrap}.chapter>summary svg{width:16px;transition:transform .18s}.chapter[open]>summary svg{transform:rotate(180deg)}.chapter-content{padding:0 8px 12px}.lesson-row{display:grid;grid-template-columns:24px minmax(0,1fr) 28px;gap:8px;align-items:center;width:100%;min-height:72px;padding:12px 10px;background:white;border:0;border-radius:var(--radius-xs);text-align:left;color:#1e2229}.lesson-row:hover{background:#f4f7fc}.lesson-row[aria-current=true]{background:#eff3f9}.lesson-row[aria-current=true] strong{color:#1b3a6b}.lesson-row>span:first-child{font-size:12px;color:var(--class-muted);text-align:center}.lesson-row strong{display:block;font-size:14px;font-weight:700;line-height:1.5}.lesson-row small{display:block;font-size:12px;color:var(--class-muted);margin-top:4px}.lesson-state{font-size:12px;color:#1b3a6b}.lesson-state svg{width:16px;height:16px}.completed-lessons>summary{list-style:none;display:flex;align-items:center;gap:8px;min-height:44px;padding:0 12px;font-size:12px;color:var(--class-muted);cursor:pointer}.completed-lessons>summary svg{width:14px;height:14px}.materials-panel{grid-column:1;grid-row:4;padding:26px 0}.materials-panel h2{font-size:16px;font-weight:800;margin-bottom:16px}.resource-card{width:100%;display:flex;align-items:center;gap:16px;padding:16px;text-align:left;border:1px solid #798798;border-radius:var(--radius-xs);background:white;color:#1b3a6b}.file-icon{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:44px;height:52px;background:#eff3f9;font-size:12px;font-weight:700;border-radius:var(--radius-xs)}.resource-card strong{display:block;font-size:14px;color:#1e2229}.resource-card small{display:block;font-size:12px;color:var(--class-muted);margin-top:4px}.resource-card>svg{margin-left:auto}.material-caption{font-size:12px;color:var(--class-muted);margin-top:10px!important}.inline-message{font-size:14px;line-height:1.6;color:#1b3a6b;background:#eff3f9;padding:16px;border-radius:var(--radius-xs);margin-top:16px}.practice-guide{margin-top:30px}.practice-guide h3{font-size:14px;font-weight:700}.practice-guide ol{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;list-style:none;counter-reset:steps;padding:0;margin:16px 0 0}.practice-guide li{counter-increment:steps;color:var(--class-muted);font-size:12px}.practice-guide li:before{content:counter(steps,decimal-leading-zero);display:block;font-size:12px;color:#1b3a6b;margin-bottom:8px}.practice-guide li span{display:block;font-size:14px;color:#1e2229;font-weight:700;margin-bottom:6px}.player-wrap.expanded{position:fixed;inset:78px 40px 20px;z-index:900;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:16px}.player-wrap.expanded .video-stage{width:min(100%,1000px);max-height:calc(100vh - 240px)}.player-wrap.expanded .playback{width:min(100%,1000px)}
@media(max-width:1000px){.room-shell{padding-inline:28px}.recent{gap:32px}.intermediate{min-height:350px}.secondary{grid-template-columns:180px minmax(0,1fr);gap:24px}.secondary .start-action{grid-column:2;justify-content:start;margin-top:-12px}.secondary .course-cover{grid-row:1/3;height:160px}.watch-shell{padding-inline:24px}.watch-grid{grid-template-columns:minmax(0,1fr) 296px;gap:24px}.lesson-slide h1{font-size:22px}.lesson-slide p{display:none}.list-course{padding:20px}.chapter>summary{gap:6px;padding-inline:12px}.list-course h2{font-size:21px}.transport-options{gap:8px}.transport-options #repeat-toggle{min-width:62px;flex-direction:column;gap:0}.slide-top small{font-size:12px}}
@media(max-width:800px){.room-heading h1{font-size:34px}.room-heading{align-items:start}.room-heading p{max-width:26ch}.recent{gap:26px}.course-content h2{font-size:26px}.course-description{font-size:14px}.resume-context small{display:block;margin:4px 0 0}.watch-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:0}.watch-path{min-height:58px}.player-wrap{position:sticky;top:57px;z-index:20}.lesson-slide h1{font-size:30px}.lesson-slide p{display:block}.lesson-info{padding:22px 0;border:0}.learning-tabs{display:flex}.lesson-panel{grid-column:1;grid-row:4;border:0;border-radius:0}.list-course,.list-heading{display:none}.chapter{border-top:0;border-bottom:1px solid var(--class-line)}.chapter>summary{padding:16px 0}.chapter-content{padding:0 0 12px}.materials-panel{display:none}.watch-grid[data-tab=materials] .materials-panel{display:block}.watch-grid[data-tab=materials] .lesson-panel{display:none}.player-wrap.expanded{inset:57px 0 0;padding:0}.watch-context{font-size:12px;gap:10px}.watch-context b{padding-left:10px}}
@media(max-width:600px){.preview-note{gap:8px}.room-shell{padding:22px 20px 40px}.course-brand>span:last-child{display:none}.room-heading{display:block;padding:24px 0 0}.room-heading h1{font-size:32px}.room-heading p{font-size:14px;max-width:none;margin-top:8px}.filter-tabs{margin-top:22px;gap:24px;border-bottom:1px solid var(--class-line)}.recent{display:flex;flex-direction:column;padding:24px 0 28px;border-top:0;gap:22px}.intermediate{min-height:0;height:218px}.course-content{padding:0}.course-content h2{font-size:26px;margin-top:10px}.course-description{font-size:14px;margin-top:8px!important}.course-description br{display:none}.course-progress{margin-top:20px}.resume-context{margin-top:18px}.resume-context small{display:inline;margin-left:6px}.resume-action{min-height:54px;padding-inline:16px}.course-until{font-size:12px}.secondary{grid-template-columns:104px minmax(0,1fr);gap:16px;padding:24px 0}.secondary .course-cover{height:126px;grid-row:1}.secondary h2{font-size:19px}.secondary .course-description{font-size:12px}.secondary-meta{font-size:12px;margin-top:8px!important}.secondary-meta span{margin:0 3px}.secondary .start-action{grid-column:1/-1;justify-content:space-between;margin:0;min-height:44px}.secondary-meta{line-height:1.8}.room-note{font-size:12px}.watch-shell{padding:0 20px 32px}.watch-category{display:none}.watch-context{gap:0}.watch-context b{font-size:12px;border:0;padding:0}.player-wrap{margin-inline:-20px;width:calc(100% + 40px);border-radius:0}.slide-top{inset:5% 5% auto}.slide-top>span:first-child{font-size:14px}.slide-top small{font-size:12px;margin-top:0;letter-spacing:0}.slide-top>span:last-child{display:none}.lesson-slide{top:33%;width:39%;left:5%}.lesson-slide h1{font-size:21px;line-height:1.35;margin-top:7px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.lesson-slide>span{font-size:12px}.lesson-slide p{display:none}.stage-play{width:44px;height:44px;top:46%;left:74%}.playback{padding:0 16px 12px}.transport{gap:8px}.transport-options{gap:8px}.speed-label select{max-width:68px;padding:0 4px}.transport-options #repeat-toggle{min-width:62px;font-size:12px;padding:0 2px}.timeline{gap:10px}.lesson-title-row h2{font-size:22px}.lesson-info{padding:24px 0 20px}.practice-guide ol{display:block}.practice-guide li{position:relative;padding-left:30px;margin-top:20px}.practice-guide li:before{position:absolute;left:0;top:0}.repeat-actions{gap:8px}.repeat-actions button{padding-inline:8px}.preview-footer{gap:12px}.lesson-row{min-height:72px}}
@media(max-width:350px){.transport{gap:8px}.transport-options{gap:8px}.transport-options #repeat-toggle{min-width:52px}.speed-label select{max-width:60px}.playback{padding-inline:12px}.lesson-slide h1{font-size:19px}.slide-top small{display:none}.resume-context small{display:block;margin:4px 0 0}.preview-note{font-size:12px;gap:6px}.course-content h2{font-size:24px}.secondary-meta span:last-child{display:none}.secondary-meta{max-width:140px}}
@media(prefers-reduced-motion:reduce){.classroom-preview *{transition:none!important;scroll-behavior:auto!important}}

.expired-view .lesson-image{display:none}.expired-view .lesson-slide{width:80%}.expired-view .lesson-slide h1{-webkit-line-clamp:unset}

/* 데스크톱 시청 공간: 폭을 영상에 배분하고 목차를 같은 면에 붙인다. */
@media(min-width:641px){
 .watch-shell{max-width:none;padding:0 16px 40px}.watch-path{min-height:52px}
 .watch-grid{grid-template-columns:minmax(0,1fr) 260px;column-gap:0;row-gap:0;align-items:start}
 .player-wrap{position:relative;top:auto;z-index:auto;border-radius:8px 0 0 8px;margin:0;width:auto}
 .lesson-panel{display:block!important;grid-column:2;grid-row:1/5;position:sticky;top:76px;border:1px solid var(--class-line);border-left:0;border-radius:0 8px 8px 0;max-height:calc(100vh - 100px);overflow:auto;scrollbar-width:thin;scrollbar-color:#aab4c1 #fff}
 .list-course{display:block;padding:18px}.list-course h2{font-size:19px}.list-course p{font-size:12px}
 .list-heading{display:flex;padding:16px}.chapter{border-top:1px solid var(--class-line);border-bottom:0}
 .chapter>summary{padding:14px 12px;gap:6px;font-size:12px}.chapter>summary small{font-size:12px}
 .chapter-content{padding:0 6px 10px}.lesson-row{grid-template-columns:20px minmax(0,1fr) 24px;gap:6px;padding:12px 8px}.lesson-row strong{font-size:13px}
 .learning-tabs{display:none}.materials-panel{display:block!important}.lesson-info,.materials-panel{padding-right:28px}.lesson-info{border-bottom:1px solid var(--class-line)}
 .player-wrap.expanded{position:fixed;top:78px;margin:0;width:auto;z-index:900;border-radius:8px}
}
@media(min-width:641px) and (max-width:1000px){
 .watch-shell{padding-inline:8px}.watch-grid{grid-template-columns:minmax(0,1fr) 220px}.watch-category{display:none}.watch-context b{border:0}
 .list-course{padding:16px}.list-course p{display:none}.list-heading{padding:14px 12px}.list-heading h2{font-size:12px}.chapter>summary{flex-wrap:wrap}.chapter>summary small{margin-left:auto}
 .lesson-row{grid-template-columns:18px minmax(0,1fr);gap:6px}.lesson-state{display:none}.lesson-row[aria-current=true]>span:first-child{color:#1b3a6b;font-weight:800}
 .lesson-slide{top:30%;width:39%}.lesson-slide h1{font-size:20px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.lesson-slide p{display:none}.slide-top small{display:none}.slide-top>span:last-child{display:none}.stage-play{width:44px;height:44px}
 .playback{padding-inline:12px}.transport-options{gap:8px}.transport-options #repeat-toggle{min-width:56px}.speed-label select{max-width:68px}.lesson-title-row h2{font-size:22px}.lesson-info,.materials-panel{padding-right:16px}.practice-guide ol{grid-template-columns:1fr;gap:16px}
}

.wide-view-button{display:flex;align-items:center;gap:8px;min-height:44px;border:1px solid #798798;background:white;color:#1b3a6b;border-radius:8px;padding:0 12px;white-space:nowrap}.wide-view-button svg{width:16px;height:16px}.wide-view-message{font-size:12px;color:#545c68;padding:8px 0 16px}:fullscreen .watch-page{overflow:auto;background:white}:fullscreen .watch-page .preview-note,:fullscreen .watch-page #navbar,:fullscreen .watch-page .preview-footer{display:none}:fullscreen .watch-page{padding-top:0!important}:fullscreen .watch-page .lesson-panel{top:8px;max-height:calc(100vh - 16px)}
@media(max-width:640px){.wide-view-button{display:none}}

html:fullscreen{background:#fff;overflow:auto}html:fullscreen .watch-shell,html:fullscreen .lesson-panel{background:#fff}html:fullscreen .watch-page{min-height:100vh;width:100%;overflow:visible}

/* 목차를 접어도 같은 위치의 버튼으로 다시 열 수 있다. 모바일 목차 탭은 유지한다. */
.outline-toggle{display:flex;align-items:center;gap:8px;min-height:44px;padding:0 12px;border:1px solid #798798;border-radius:8px;background:#fff;color:#1b3a6b;white-space:nowrap}.outline-toggle svg{width:18px;height:18px}.outline-toggle[aria-expanded=false] svg{transform:scaleX(-1)}
@media(min-width:641px){.watch-grid.is-outline-collapsed{grid-template-columns:minmax(0,1fr)}.watch-grid.is-outline-collapsed .lesson-panel{display:none!important}.watch-grid.is-outline-collapsed .player-wrap{border-radius:8px}.watch-grid.is-outline-collapsed .lesson-info,.watch-grid.is-outline-collapsed .materials-panel{padding-right:0}}
@media(max-width:640px){.outline-toggle{display:none}}