body.material-reader-open{overflow:hidden!important}
.material-video-tools{display:flex;gap:12px;align-items:center;flex-wrap:wrap;max-width:1000px;margin:16px auto 8px}.material-video-tools select{min-height:44px;font:inherit;background:transparent;color:inherit;border:1px solid var(--fw-line);border-radius:4px;padding:6px}.material-chapters{display:flex;flex-direction:column;gap:8px;max-width:1000px;margin:16px auto}.material-chapters button{text-align:left;white-space:normal}.material-save-status{font-size:14px;max-width:1000px;margin:8px auto;line-height:1.6}.material-document video{width:100%;max-height:65vh;background:#171510}.material-document video::cue{font-size:1.1em;background:#171510e6;color:#fff}
.material-reader{position:fixed;inset:0;z-index:100000;display:flex;flex-direction:column;background:var(--fw-card);color:var(--fw-text);font-family:"Microsoft YaHei",sans-serif;line-height:1.5;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);box-sizing:border-box}
.material-reader[hidden],.material-reader [hidden]{display:none!important}
.material-reader-frame{display:flex;flex-direction:column;flex:1;min-height:0;min-width:0;width:100%}
.material-course-rail{display:contents}
.material-header{display:flex;align-items:center;gap:12px;padding:8px 12px;border-bottom:1px solid var(--fw-line);background:var(--fw-card);flex-shrink:0}
.material-header h2{font:inherit;font-size:16px;font-weight:600;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin:0}
.material-reader button,.material-reader input{font:inherit;color:inherit;font-size:14px;min-height:44px;border:1px solid var(--fw-line);border-radius:4px;background:var(--fw-card);box-sizing:border-box}
.material-reader button{padding:6px 12px;cursor:pointer;touch-action:manipulation;flex-shrink:0}.material-reader button:active{background:#eadfc9}.material-reader button:disabled{opacity:.4;cursor:default}.material-reader :focus-visible{outline:2px solid var(--fw-line);outline-offset:2px}
.material-toolbar{display:flex;align-items:center;justify-content:center;gap:8px;padding:8px;flex-wrap:wrap;flex-shrink:0;border-bottom:1px solid #ded6c6}.material-toolbar label{display:flex;align-items:center;gap:5px;font-size:14px;white-space:nowrap}.material-toolbar input{width:52px;text-align:center;padding:4px}.material-zoom{display:flex;gap:8px}.material-zoom button{min-width:44px}
.material-status{margin:0;padding:10px 16px;font-size:14px;flex-shrink:0}.material-document{flex:1;min-height:0;overflow:auto;padding:12px;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;box-sizing:border-box}.material-document canvas{display:block;margin:0 auto;background:var(--fw-card);max-width:none!important;box-shadow:0 2px 10px #0001}.material-document img,.material-document video{display:block;max-width:100%;height:auto;margin:0 auto}.material-document audio{display:block;max-width:100%;width:100%;margin:24px auto}.material-document pre{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;font-size:16px;max-width:900px;margin:auto}
@media(max-width:400px){.material-header{gap:8px}.material-header button{padding-inline:8px}.material-toolbar{gap:6px}.material-toolbar>button{padding-inline:8px}.material-toolbar input{width:46px}.material-zoom{justify-content:center;flex-basis:100%}}

.material-icon{display:inline-block;width:24px;height:24px;vertical-align:middle;flex:0 0 24px}
.material-reader button,.material-reader input{min-height:48px;font-size:18px}.material-reader button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:48px}.material-header button{width:52px;min-height:52px;padding:12px}.material-header h2{font-size:18px}.material-toolbar label{font-size:18px}.material-toolbar input{width:60px}.material-zoom button{min-width:48px}
.material-status,.material-save-status{font-size:17px}.material-video-tools{gap:12px}.material-video-tools label{display:flex;align-items:center;gap:8px;font-size:18px}.material-video-tools select{min-height:48px;font-size:18px}.material-video-tools [aria-pressed=true]{border:2px solid currentColor;font-weight:700;text-decoration:underline;text-underline-offset:4px}
.material-chapter-list{max-width:1000px;margin:12px auto}.material-chapter-list summary{cursor:pointer;min-height:48px;padding:12px 0;box-sizing:border-box;font-size:18px}.material-chapters{margin:0}.material-chapters button{justify-content:flex-start;line-height:1.6}
.material-finish{max-width:1000px;margin:20px auto;padding-block:16px;border-top:1px solid var(--fw-line);font-size:18px}.material-finish button{min-height:52px}.material-finish p{margin:0 0 12px}
@media(max-width:400px){.material-toolbar{gap:8px}.material-toolbar input{width:56px}.material-header h2{font-size:17px}}

@font-face{font-family:BoardChalk;src:url('/fonts/board-chalk.woff2') format('woff2');font-display:swap}
@font-face{font-family:BoardLatin;src:url('/fonts/board-latin.woff2') format('woff2');font-display:swap}
@font-face{font-family:BoardDeva;src:url('/fonts/board-deva.woff2') format('woff2');font-display:swap}
.material-blackboard{width:100%;max-width:1000px;margin:0 auto}
.material-board-surface{position:relative;background:#21483c;border:3px solid #796146;box-sizing:border-box;overflow:hidden}
.material-board-surface video{width:100%;max-height:none;aspect-ratio:16/9;object-fit:contain;background:#21483c;filter:brightness(1.15)}
.material-reader .material-board-toggle{position:absolute;right:8px;bottom:54px;z-index:2;width:44px;min-width:44px;height:44px;min-height:44px;padding:8px;border:1px solid #bdcdb5;border-radius:8px;background:#21483cef;color:#fff8dd;box-shadow:0 1px 4px #0003}
.material-board-toggle svg,.material-board-play svg{display:block;width:24px;height:24px}
.material-reader .material-board-toggle:active{background:#386250}
.material-reader .material-board-toggle:focus-visible{outline:3px solid #fff1a9;outline-offset:-4px}
.material-blackboard.is-portrait{max-width:580px}
.is-portrait .material-board-surface{aspect-ratio:3/4}
.is-portrait .material-board-surface video{position:absolute;inset:0;width:100%;height:100%}
.material-board-paper{position:absolute;inset:0;overflow-y:auto;overflow-x:hidden;background:#21483c;color:#f6f3df;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.material-board-reading{box-sizing:border-box;min-height:100%;padding:22px 20px 66px;display:flex;flex-direction:column;gap:20px;font-family:BoardChalk,BoardLatin,BoardDeva,KaiTi,serif;font-size:23px;line-height:1.65;overflow-wrap:anywhere;word-break:normal;text-shadow:.2px .25px #ffffe62b}
.material-board-reading p,.material-board-reading h3{margin:0;color:inherit;font-family:inherit}
.material-board-reading h3{font-size:27px;line-height:1.4;font-weight:400}
.material-board-reading .board-eyebrow{font-size:16px;color:#eee5b4}
.board-body{flex:1;display:flex;flex-direction:column;justify-content:center;gap:14px}
.board-body p,.board-answer p{white-space:pre-line}
.material-board-reading img{display:block;width:100%;height:auto;object-fit:contain;margin:6px auto;background:transparent}
.board-answer{border-top:1px solid #b8cbb0;padding-top:16px}
.board-answer p:first-child{color:#fff0ac}
.material-board-reading .board-source{border-top:1px solid #90b49b;padding-top:12px;color:#eee5b4;font-size:14px;line-height:1.6}
.material-board-reading .board-caption{padding:10px 12px;background:#183b30;font-size:19px;line-height:1.6}
.is-portrait .material-board-toggle{bottom:10px}
.material-board-controls{display:flex;align-items:center;gap:8px;padding:10px 0;flex-wrap:wrap}
.material-reader .material-board-play{width:48px;height:48px;padding:10px}
.material-reader .material-board-controls input{flex:1;min-width:80px;height:48px;border:0;padding:0;background:transparent;accent-color:var(--fw-accent);touch-action:pan-y}
.material-board-time{font-size:14px;font-variant-numeric:tabular-nums;white-space:nowrap}
@media(max-width:360px){.material-board-reading{padding:18px 16px 64px;font-size:22px;gap:16px}.material-board-reading h3{font-size:25px}}

.material-reader .material-board-more{position:absolute;left:10px;bottom:10px;z-index:2;min-width:44px;width:44px;min-height:44px;height:44px;padding:10px;border:0;background:#21483cef;color:#fff0ac;border-radius:8px}
.material-board-more svg{display:block;width:24px;height:24px}
@media(prefers-reduced-motion:reduce){.material-board-paper{scroll-behavior:auto}}

/* Course focus: board, transport and test share one viewport; PDFs keep their reader. */
.material-course:not(.is-course-fullscreen) .material-header{display:grid;grid-template-columns:52px minmax(0,1fr) auto;column-gap:12px;row-gap:6px}
.material-course:not(.is-course-fullscreen) .material-header>[data-material-close]{grid-row:1;grid-column:1}
.material-course:not(.is-course-fullscreen) .material-header>[data-cast-toggle]{grid-row:1;grid-column:2;justify-self:end}
.material-course:not(.is-course-fullscreen) .material-header>.fw-tools{grid-row:1;grid-column:3}
.material-course:not(.is-course-fullscreen) .material-header h2{grid-row:2;grid-column:1/-1;width:100%;min-width:0;overflow:visible;text-overflow:clip;white-space:normal;overflow-wrap:anywhere;line-height:1.4}
.material-course .material-document{display:flex;flex-direction:column;gap:5px;overflow:hidden;padding:8px;position:relative}
.material-course .material-blackboard{flex:1;min-height:0;display:flex;flex-direction:column;width:100%;max-width:1000px}
.material-course .material-board-surface{flex:1;min-height:0;aspect-ratio:auto}
.material-course .material-blackboard.is-portrait{max-width:680px}
.material-course .material-board-surface video{height:100%;width:100%;aspect-ratio:auto;object-fit:contain}
.material-course .material-board-paper{overflow:hidden;touch-action:none}
.material-course .material-board-reading{position:absolute;left:50%;top:50%;min-height:0;padding:14px 14px 46px;gap:12px;transform-origin:center;will-change:transform}
.material-course .material-board-reading h3{font-size:25px}
.material-course .board-source{font-size:12px;padding-top:6px}
.material-course .board-caption{font-size:17px;padding:6px 10px}
.material-course .board-body{gap:10px}
.material-course .board-answer{padding-top:8px}
.material-course .material-board-controls{flex:none;flex-wrap:nowrap;padding:5px 0 0;gap:6px}
.material-course .material-board-time{font-size:13px}
.material-course .material-video-tools{flex:none;width:100%;max-width:680px;justify-content:center;gap:8px;margin:0 auto}
.material-course .material-video-tools select{min-height:44px;font-size:16px;padding:4px}
.material-course .material-video-tools button{min-height:44px;height:44px;padding:6px}
.material-course .material-audio-attribution{flex:none;text-align:center;font-size:12px;line-height:1.3;margin:0}
.material-course .material-save-status{flex:none;font-size:12px;text-align:center;line-height:1.3;margin:0}
.material-course .material-save-status:empty{display:none}
.material-course .material-finish{flex:none;width:100%;max-width:680px;margin:0 auto;padding:0;border:0}
.material-course .material-finish button{width:100%;min-height:44px;background:var(--fw-accent);color:var(--fw-card);font-weight:700}
.material-course .material-extras{position:absolute;inset:0;z-index:5;background:var(--fw-card);padding:12px;overflow:auto;box-sizing:border-box}
.material-course .material-extras>button{display:flex;margin-left:auto}
.material-course .material-extras .material-chapter-list{margin:8px auto}
.material-course .material-board-toggle{bottom:8px}
.material-course .needs-play .material-board-play{background:var(--fw-accent);color:var(--fw-card)}
.material-testing:not(.material-board-panel-active) .material-document>*:not(.material-quiz){display:none!important}
.material-quiz{display:flex;flex-direction:column;flex:1;min-height:0;gap:10px;width:100%;max-width:680px;margin:auto}
.material-quiz header{display:flex;align-items:center;gap:10px;justify-content:space-between;flex:none}
.material-quiz h3{font-size:20px;margin:0}
.material-quiz-body{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;font-size:18px}
.material-quiz fieldset{border:0;margin:0;padding:0}
.material-quiz legend{font-size:20px;font-weight:700;margin-bottom:12px}
.material-quiz label{display:flex;align-items:center;gap:10px;min-height:48px;padding:8px;margin:8px 0;border:1px solid var(--fw-line);border-radius:8px}
.material-quiz input{min-height:20px;width:22px;height:22px;flex:none}
.material-quiz-score{text-align:center;font-size:36px;font-weight:700;margin:0}
.material-wrong{color:#d53a3a;display:block;font-weight:700;text-decoration-thickness:2px}
.material-correct{color:#d53a3a;font-weight:700}
.material-quiz-error{color:#d53a3a;font-size:14px;margin:0}
.material-quiz-actions{display:flex;flex-wrap:wrap;gap:8px;flex:none}
.material-quiz-actions p{font-size:14px;margin:0}
.material-reader .material-primary{background:var(--fw-accent);color:var(--fw-card);font-weight:700;flex:1}
@media(max-height:620px){.material-course .material-header{padding-block:4px}.material-course .material-header button{min-height:44px;height:44px}.material-course .material-video-tools{gap:5px}.material-quiz{gap:6px}}

/* Fullscreen puts the board behind floating controls, keeping its orientation and playback. */
.material-course.is-course-fullscreen{background:#21483c}
.material-course.is-course-fullscreen .material-document{padding:0;gap:0;height:100%;width:100%}
.material-course.is-course-fullscreen .material-header{position:absolute;inset:env(safe-area-inset-top) 0 auto;z-index:8;padding:3px 8px;min-height:44px;background:transparent;border:0}
.material-course.is-course-fullscreen .material-header h2{display:none}
.material-course.is-course-fullscreen .material-header .fw-tools{margin-left:auto}
.material-course.is-course-fullscreen .material-header>button{min-height:44px;height:44px;width:44px;padding:8px}
.material-course.is-course-fullscreen .material-header .fw-tools{background:var(--fw-card);border-radius:24px}
.material-course.is-course-fullscreen .material-blackboard{max-width:none;width:100%;height:100%;margin:0}
.material-course.is-course-fullscreen .material-board-surface{border-width:0}
.material-course.is-course-fullscreen .material-board-reading{padding:60px 18px 150px;box-sizing:border-box}
.material-course.is-course-fullscreen:not(.course-controls-visible) .material-board-reading{padding:14px 18px 38px}
.material-course.is-course-fullscreen .material-board-controls{position:absolute;left:0;right:0;bottom:86px;z-index:7;padding:6px 8px;background:var(--fw-card)}
.material-course.is-course-fullscreen .material-video-tools{position:absolute;left:0;right:90px;bottom:32px;z-index:7;width:auto;max-width:none;margin:0;min-height:54px;background:var(--fw-card)}
.material-course.is-course-fullscreen .material-finish{position:absolute;right:0;bottom:32px;width:90px;max-width:none;z-index:7;min-height:54px;background:var(--fw-card)}
.material-course.is-course-fullscreen .material-finish button{min-height:54px;border-radius:0}
.material-course.is-course-fullscreen .material-audio-attribution{position:absolute;left:0;right:0;bottom:5px;z-index:7;color:#fff8dd;background:#21483c}
.material-course.is-course-fullscreen .material-save-status{position:absolute;left:8px;bottom:6px;z-index:8;color:#fff8dd;background:#21483c}
.material-course.is-course-fullscreen .material-board-toggle{bottom:145px}
.material-course.is-course-fullscreen:not(.course-controls-visible):not(.material-testing) .material-header,
.material-course.is-course-fullscreen:not(.course-controls-visible):not(.material-testing) .material-board-controls,
.material-course.is-course-fullscreen:not(.course-controls-visible):not(.material-testing) .material-video-tools,
.material-course.is-course-fullscreen:not(.course-controls-visible):not(.material-testing) .material-finish,
.material-course.is-course-fullscreen:not(.course-controls-visible):not(.material-testing) .material-board-toggle{visibility:hidden;pointer-events:none}
.material-course.is-course-fullscreen.material-testing:not(.material-board-panel-active) .material-document{padding:56px 12px 12px;background:var(--fw-card)}
.material-course:fullscreen,.material-course:-webkit-full-screen{width:100%;height:100%;background:var(--fw-card)}

/* Compact, equal-height self-test controls; answer choices retain their touch area. */
.material-quiz>.material-quiz-next{flex:0 0 44px;align-self:flex-end;width:64px;height:44px;min-height:44px;border-radius:12px;margin:0;padding:8px}
.material-quiz-actions{justify-content:flex-end;align-items:center;gap:8px;padding-top:8px;border-top:1px solid var(--fw-line)}
.material-quiz-actions>button,.material-quiz-actions>.material-primary{flex:0 1 auto;min-height:44px;font-size:16px;padding:8px 14px;border-radius:12px}
.material-board-subtitle{position:absolute;z-index:3;left:4%;right:4%;bottom:12px;max-height:25%;overflow:auto;margin:0;padding:7px 12px;border-radius:6px;background:#102d25eb;color:#fff8e8;text-align:center;font:500 clamp(16px,2vw,30px)/1.5 BoardChalk,BoardLatin,BoardDeva,serif;white-space:pre-line;pointer-events:none}
.material-course.is-course-fullscreen .material-board-subtitle{bottom:20px}
.material-course.is-course-fullscreen.course-controls-visible .material-board-subtitle{bottom:150px}
.material-course .material-board-paper{padding-bottom:60px;box-sizing:border-box}
.material-cast-panel{position:absolute;inset:8px;z-index:12;max-width:520px;margin:auto;max-height:calc(100% - 16px);overflow:auto;padding:16px;box-sizing:border-box;border:1px solid var(--fw-line);border-radius:16px;background:var(--fw-card);color:var(--fw-text)}
.material-cast-panel header{display:flex;align-items:center;justify-content:space-between;gap:12px}.material-cast-panel h3{font-size:20px;margin:0}.material-cast-panel p{font-size:16px;line-height:1.6;margin:10px 0 20px}.material-cast-panel button{min-height:44px;border-radius:10px}.material-cast-panel .material-cast-mirror{background:var(--fw-action);color:var(--fw-on-action);margin-top:16px}.material-cast-status:empty{display:none}
/* TV safe area always preserves all four edges. Presentation is not a connection claim. */
.material-course.is-tv-presentation .material-document{padding:3vh 3vw;justify-content:center;background:#10231d}
.material-course.is-tv-presentation .material-blackboard{flex:none;width:min(100%,calc((100dvh - 6vh)*16/9));max-width:none;height:auto;min-height:0;aspect-ratio:16/9;margin:auto}
.material-course.is-tv-presentation .material-board-surface{border:8px solid #8c7252;box-shadow:inset 0 0 0 2px #b19a79;overflow:hidden}
.material-course.is-tv-presentation .material-board-reading{width:1280px!important;min-height:720px!important;padding:40px 56px 92px;gap:20px;font-size:32px}
.material-course.is-tv-presentation .material-board-reading h3{font-size:44px}.material-course.is-tv-presentation .board-source{font-size:18px}
.material-course.is-tv-presentation .material-board-subtitle{bottom:20px;font-size:clamp(16px,2.3vw,36px);left:5%;right:5%;max-height:22%}
.material-course.is-tv-presentation.course-controls-visible .material-board-subtitle{bottom:150px}
.material-course.is-tv-presentation .material-board-toggle{display:none}
.material-course.is-tv-presentation.material-testing:not(.material-board-panel-active) .material-document{padding:56px 12px 12px;background:var(--fw-card)}
.material-course.is-course-fullscreen .material-video-tools{right:72px;flex-wrap:nowrap;gap:4px;min-width:0}
.material-course.is-course-fullscreen .material-video-tools select{width:64px;max-width:64px;min-width:0;font-size:14px}
.material-course.is-course-fullscreen .material-video-tools button{width:44px;min-width:44px;padding:8px}
.material-course.is-course-fullscreen .material-finish{width:72px}
.material-course.is-course-fullscreen .material-finish button{width:72px;white-space:nowrap;gap:4px;padding:6px;font-size:16px}
.material-course.is-tv-presentation.course-controls-visible .material-document{padding:64px 3vw 150px}
.material-course.is-tv-presentation.course-controls-visible .material-blackboard{width:min(100%,calc(max(80px,100dvh - 214px)*16/9))}
.material-course.is-tv-presentation.course-controls-visible .material-board-subtitle{bottom:20px}

/* Tests and chapters use the existing board, separate from its zoomable lecture. */
.material-board-surface.has-board-panel>video,.material-board-surface.has-board-panel>.material-board-paper,.material-board-surface.has-board-panel>.material-board-subtitle,.material-board-surface.has-board-panel>.material-board-toggle{visibility:hidden;pointer-events:none}
.material-board-overlay{position:absolute;inset:0;z-index:6;display:flex;flex-direction:column;min-height:0;padding:14px;background:#21483c;color:#f6f3df;font-family:BoardChalk,BoardLatin,BoardDeva,KaiTi,serif;overflow:hidden;box-sizing:border-box;touch-action:pan-y}
.material-board-overlay .material-quiz{max-width:none;margin:0;gap:8px}
.material-board-overlay .material-quiz header{min-height:44px}
.material-board-overlay .material-quiz h3{font-size:23px;line-height:1.4}
.material-board-overlay .material-quiz-body{font-size:21px;line-height:1.6;touch-action:pan-y}
.material-board-overlay .material-quiz legend{font-size:23px;line-height:1.5}
.material-board-overlay .material-quiz label{border-color:#90b49b;padding:8px 10px;margin:8px 0;gap:10px}
.material-board-overlay .material-quiz input{accent-color:#ead89e}
.material-board-overlay button{background:transparent;color:#f6f3df;border-color:#90b49b;font-family:inherit}
.material-board-overlay button:active{background:#386250}
.material-board-overlay .material-primary{background:#eee5b4;color:#183b30;border-color:#eee5b4}
.material-board-overlay :focus-visible{outline:2px solid #fff1a9;outline-offset:-3px}
.material-board-overlay .material-wrong,.material-board-overlay .material-correct,.material-board-overlay .material-quiz-error{color:#ff9c91}
.material-board-overlay .material-quiz-actions{border-color:#90b49b}
.material-course .material-board-overlay .material-extras{position:static;inset:auto;flex:1;min-height:0;width:100%;background:transparent;color:inherit;padding:0;overflow:auto;touch-action:pan-y}
.material-board-overlay .material-chapter-list{margin:0}
.material-board-overlay .material-chapter-list summary{font-size:22px}
.material-board-overlay .material-chapters button{font-size:21px;width:100%;min-height:48px}
.material-course.is-course-fullscreen .material-board-overlay{padding:56px 14px 150px}
.material-course.is-course-fullscreen.material-board-panel-active:not(.is-tv-presentation) .material-board-surface{border-width:3px}
.material-course.is-tv-presentation .material-board-overlay{padding:14px 22px}
@media(max-height:620px){.material-board-overlay{padding:8px}.material-board-overlay .material-quiz-body,.material-board-overlay .material-quiz legend,.material-board-overlay .material-chapters button{font-size:18px}.material-board-overlay .material-quiz label{min-height:44px;margin:6px 0}}

/* Screen mirroring uses the page board; avoid an extra filtered video compositor layer. */
.material-course.is-tv-presentation .material-board-surface video{filter:none}
.material-course.is-tv-presentation .material-board-reading{will-change:auto;text-shadow:none}
.material-course.is-tv-presentation .material-board-paper{-webkit-overflow-scrolling:auto}
.material-cast-panel{inset:auto 8px;top:50%;transform:translateY(-50%);max-height:calc(100% - 16px);height:max-content;overflow:auto}

/* A 16:9 mirror frame can be shallow on phones: scroll the whole test instead of collapsing its answers. */
.material-course.is-tv-presentation .material-board-overlay{overflow-y:auto}
.material-course.is-tv-presentation .material-board-overlay .material-quiz{flex:none;height:auto;min-height:100%}
.material-course.is-tv-presentation .material-board-overlay .material-quiz-body{flex:none;overflow:visible}

/* Native TV video is independent of the portrait phone controller. */
.material-course.is-tv-remote .material-board-surface video{filter:none}
.material-cast-connection{flex-basis:100%;margin:0;text-align:center;font-size:13px}
.material-cast-help{font-size:13px}

/* Landscape lesson: rotate the inner frame when the host stays portrait, including native fullscreen. */
.material-course.is-course-landscape{padding:0;background:var(--fw-card)}
.material-course.is-course-landscape .material-reader-frame{position:absolute;inset:0;width:100%;height:100%}
.material-course.is-course-landscape.is-course-rotated .material-reader-frame{inset:auto;left:0;top:0;width:var(--course-view-height);height:var(--course-view-width);transform:translateX(var(--course-view-width)) rotate(90deg);transform-origin:0 0}
.material-course.is-course-landscape .material-header{inset:0 auto auto 0;width:85%;box-sizing:border-box;gap:4px;padding:4px;background:var(--fw-card);align-items:center}
.material-course.is-course-landscape .material-header h2{display:block;font-size:14px;line-height:1.35;white-space:normal;overflow:visible;text-overflow:clip;overflow-wrap:anywhere}
.material-course.is-course-landscape .material-header .fw-tools{margin-left:auto;flex:none}
.material-course.is-course-landscape .material-document{padding:0;gap:0;height:100%;width:100%;overflow:hidden}
.material-course.is-course-landscape .material-blackboard{width:85%;max-width:none;height:100%;margin:0;padding:calc(var(--course-header-height,52px) + 4px) 4px 4px;box-sizing:border-box}
.material-course.is-course-landscape .material-board-surface{border-width:3px}
.material-course.is-course-landscape .material-board-reading{padding:12px 14px 42px}
.material-course.is-course-landscape .material-board-overlay{padding:8px;overflow-y:auto}
.material-course.is-course-landscape .material-board-overlay .material-quiz{flex:none;min-height:100%;height:auto}
.material-course.is-course-landscape .material-board-overlay .material-quiz-body{flex:none;overflow:visible}
.material-course.is-course-landscape .material-course-rail{position:absolute;right:0;top:0;bottom:0;display:flex;flex-direction:column;align-items:stretch;gap:6px;width:15%;padding:6px 4px;box-sizing:border-box;overflow-y:auto;overscroll-behavior:contain;background:var(--fw-card);touch-action:pan-y}
.material-course.is-course-landscape .material-board-controls{position:static;inset:auto;display:flex;flex-direction:column;gap:2px;flex:none;margin:0;padding:0;min-width:0}
.material-course.is-course-landscape .material-board-controls input{flex:none;width:100%;min-width:0;min-height:24px;height:24px;touch-action:none}
.material-course.is-course-landscape .material-board-time{font-size:11px;text-align:center;white-space:normal}
.material-course.is-course-landscape .material-video-tools{position:static;inset:auto;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;width:100%;min-height:0;margin:0;padding:0;max-width:none}
.material-course.is-course-landscape .material-video-tools label,.material-course.is-course-landscape .material-cast-connection{grid-column:1/-1;min-width:0}
.material-course.is-course-landscape .material-video-tools select{width:100%;min-width:0;font-size:14px;min-height:36px;height:36px;padding:2px}
.material-course.is-course-landscape .material-video-tools button{width:100%;min-width:0;padding:4px}
.material-course.is-course-landscape .material-finish{position:static;inset:auto;width:100%;min-height:0;max-width:none;margin:0}
.material-course.is-course-landscape .material-finish button{width:100%;min-width:0;min-height:44px;height:44px;font-size:14px;padding:4px;gap:3px;border-radius:4px}
.material-course.is-course-landscape .material-save-status{position:static;inset:auto;background:transparent;color:var(--fw-text);margin:0;font-size:11px}
.material-course.is-course-landscape .material-board-toggle{bottom:8px}
.material-course.is-course-fullscreen.is-course-landscape .material-board-subtitle{bottom:8px}
.material-course.is-course-fullscreen.is-course-landscape:not(.course-controls-visible) .material-header,
.material-course.is-course-fullscreen.is-course-landscape:not(.course-controls-visible) .material-board-controls,
.material-course.is-course-fullscreen.is-course-landscape:not(.course-controls-visible) .material-video-tools,
.material-course.is-course-fullscreen.is-course-landscape:not(.course-controls-visible) .material-finish,
.material-course.is-course-fullscreen.is-course-landscape:not(.course-controls-visible) .material-board-toggle{visibility:visible;pointer-events:auto}

/* Keep one course orientation control in the header. */
.material-course .material-header>[data-cast-toggle],.material-course .material-board-toggle{display:none!important}