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.terminal-practice-view #terminal{display:block}
.terminal-practice-view .workspace,.terminal-practice-view .sidebar{visibility:hidden}
.shell-collapsed .terminal-tools>#practice-fullscreen,.shell-away .terminal-tools>#practice-fullscreen{display:inline-block}

/* Ease down larger reading text while preserving small UI text sizes. */
h1{font-size:1.45rem}
h2{font-size:1.2rem}
h3{font-size:1rem}
.login h1{font-size:2.35rem}
.source-reader h1{font-size:1.5rem}
.lesson-copy p,.objective-guides details p,.reading-links p{font-size:.96rem}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.workspace-heading h1{font-size:1.3rem}}

/* Compact learning layout with clear, reachable menu controls. */
.reading-progress .menu-toggle{font-size:1rem;line-height:1.2;min-width:32px;min-height:28px;padding:2px 8px}
.app-main{padding:18px 24px}
.app-main>section{padding:20px;margin-bottom:16px}
.course-banner{padding:10px 14px;margin-bottom:12px}
.breadcrumbs{margin-bottom:14px}
.workspace-heading{margin:8px 0 12px;gap:16px}
.overview-strip{margin-bottom:16px;gap:14px}
.stats{font-size:.75rem;gap:16px}
.stats b{font-size:.9375rem;margin-right:4px}
.section-heading{padding-bottom:12px;margin-bottom:16px}
.beginner-guide{margin:18px 0 24px}
.beginner-guide h3{margin-top:20px}
.beginner-guide h4{margin:16px 0 8px}
.lesson-copy p,.objective-guides details p,.reading-links p{line-height:1.7}
.lab-steps>li{margin-bottom:18px}
.guide-example{padding:18px 0}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.app-main{padding:12px}.app-main>section{padding:16px}.stats{gap:12px}}

/* Compact navigation rail and a single-column lesson drawer. */
.workspace-page{--sidebar:64px}
.workspace-page .workspace{left:64px}
.lesson-rail{position:fixed;inset:0 auto var(--shell-height) 0;width:64px;display:flex;flex-direction:column;align-items:center;gap:14px;padding:14px 5px;background:#252526;border-right:1px solid var(--border);z-index:41}
.lesson-rail .sidebar-brand{min-height:32px;margin:0;padding:0;border:0;font-size:.875rem;font-weight:700;letter-spacing:1px;color:#ddd}
.lesson-rail .menu-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:52px;min-height:54px;padding:6px 2px;font-size:.625rem;border-color:transparent}
.lesson-rail .menu-toggle[aria-expanded=true]{background:#094771;border-color:#78ade3;color:#fff}
.workspace-page .lesson-drawer{position:fixed;inset:0 auto var(--shell-height) 64px;width:320px;max-height:none;z-index:40;padding:0 14px 18px;background:#25272c;border-right:1px solid #525965;border-radius:0;box-shadow:8px 0 24px #0005;overflow:auto;scrollbar-width:auto}
.drawer-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;position:sticky;top:0;padding:14px 0 10px;background:#25272c;z-index:1}
.drawer-heading strong{font-size:.9375rem}
.drawer-heading button{font-size:1.25rem;line-height:1;min-width:32px;min-height:32px}
.lesson-drawer .lesson-search{margin:0 0 16px;font-size:.8125rem}
.lesson-drawer .lesson-search input{background:#1e2228;font-size:.8125rem}
.lesson-drawer>.eyebrow,.lesson-drawer>.workspace-home{display:none}
.lesson-drawer .path{display:grid;grid-template-columns:1fr;gap:8px}
.lesson-drawer .exam-heading{margin:12px 0 0;color:#9cdcfe}
.lesson-drawer .track-group{padding:0}
.lesson-drawer .track-group>summary{background:#30343b}
.lesson-drawer .lesson-link{align-items:flex-start}
.lesson-drawer .next-card,.lesson-drawer .sidebar-actions{margin:18px 0 0;padding-top:12px}
.workspace-page .mobile-actions,.workspace-page .mobile-path{display:none}
.terminal-practice-view .lesson-rail{display:none}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.workspace-page{--sidebar:52px}.workspace-page .workspace{left:52px}.lesson-rail{width:52px;padding:12px 3px}.lesson-rail .menu-toggle{width:44px;font-size:.625rem}.workspace-page .lesson-drawer{left:52px;width:min(320px,calc(100vw - 52px));padding:0 12px 16px}}

/* Consistent outline symbols, with text labels retained for clarity. */
.section-icon{width:1.1em;height:1.1em;display:inline-block;vertical-align:-.16em;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;margin-right:.5em}
.section-nav [role=tab],.lesson-subnav [role=tab]{display:inline-flex;align-items:center}
.app-main>section>h2>.section-icon,.section-heading h2>.section-icon{color:var(--section-color,var(--accent))}
.track-group>summary>span:nth-child(2)>.section-icon{color:#8fb6d9}

/* Home stays at the right of the tabs, outside their scrollable tab list. */
.top-navigation{display:flex;flex:none;align-items:stretch;min-width:0;background:#2d2d30;border-bottom:1px solid var(--border)}
.top-navigation .section-nav{flex:1;min-width:0;border-bottom:0;padding-right:8px}
.top-home-link{display:flex;flex:none;align-items:center;padding:0 18px;border-left:1px solid var(--border);color:#ccc;font-size:.8125rem;white-space:nowrap}
.top-home-link:hover{background:#373b42;color:#9cdcfe}
.top-home-link .section-icon{color:#8fb6d9}
.learning-full-view .top-navigation{display:none}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.top-home-link{padding:0 12px}.top-home-link span{display:none}.top-home-link .section-icon{margin:0;width:18px;height:18px}}

/* Quiet color accents for the main page's information and learning steps. */
.page-signpost>.section-icon{color:#8fb6d9}
.stats>span{display:inline-flex;align-items:center;white-space:nowrap}
.stats>span>.section-icon{width:16px;height:16px;margin-right:7px}
.stats>span:nth-child(1)>.section-icon{color:#dfb46d}
.stats>span:nth-child(2)>.section-icon{color:#8fb6d9}
.stats>span:nth-child(3)>.section-icon{color:#8cbd88}
.compact-progress .section-icon{color:#dfb46d}
#beginner-heading>.section-icon,.learning-tip strong>.section-icon{color:#dfb46d}
.beginner-guide>h3:not(#beginner-heading)>.section-icon,.job-title h3>.section-icon{color:#69c5b3}
.understanding-check h4>.section-icon{color:#b39bdb}

/* Direct lesson and notes shortcuts share the lesson rail's visual language. */
.lesson-rail{gap:8px;overflow-y:auto}
.lesson-rail .rail-shortcut{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:52px;min-height:54px;padding:6px 2px;font-size:.625rem;border-color:transparent;color:#bfc5ce;flex-shrink:0}
.lesson-rail .rail-shortcut>.section-icon{width:20px;height:20px;margin:0}
.lesson-rail .rail-shortcut[aria-controls=lesson]>.section-icon{color:#69c5b3}
.lesson-rail .rail-shortcut[aria-controls=notes-section]>.section-icon{color:#b39bdb}
.lesson-rail .rail-shortcut[aria-pressed=true]{background:#303943;border-color:#526779;color:#fff}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.lesson-rail .rail-shortcut{width:44px}}

/* Section links belong to their selected lesson inside the course tree. */
.lesson-section-links{display:flex;flex-direction:column;gap:3px;margin:4px 0 10px 18px;padding-left:12px;border-left:1px solid #526779}
.lesson-section-links a{display:flex;align-items:center;padding:6px 10px;border-radius:6px;font-size:.8125rem;color:#bfc5ce}
.lesson-section-links a:hover{background:#343943;color:#fff}
.lesson-section-links a[aria-current=page]{background:#303943;color:#fff}
.lesson-section-links a[data-section=practical] .section-icon{color:#69c5b3}
.lesson-section-links a[data-section=notes-section] .section-icon{color:#b39bdb}
.lesson-section-links a[data-section=theory] .section-icon{color:#8fb6d9}

/* Expand any lesson to choose its own section before navigating. */
.lesson-entry{border:0;padding:0}
.lesson-entry>summary.lesson-link{cursor:pointer;list-style:none}
.lesson-entry>summary.lesson-link::before{content:none}
.lesson-entry>summary.lesson-link .lesson-expand{margin-left:auto;transition:transform .15s}
.lesson-entry[open]>summary.lesson-link .lesson-expand{transform:rotate(180deg)}
.lesson-entry[open]>summary.lesson-link:not(.selected){background:#30343b;color:#fff}

/* Choose the lesson in the first row, then its section in the second row. */
.workspace-page{--sidebar:0px}
.workspace-page .workspace{left:0}
.lesson-picker-row{display:flex;flex:none;align-items:center;gap:16px;padding:9px 16px;min-height:58px;background:#25272c;border-bottom:1px solid var(--border)}
.lesson-picker-row .menu-toggle{display:flex;align-items:center;gap:7px;flex:none;font-size:.8125rem;padding:6px 10px}
.lesson-picker-row .menu-toggle[aria-expanded=true]{background:#094771;border-color:#78ade3}
.current-lesson{min-width:0;flex:1;line-height:1.4}
.current-lesson span{display:block;color:#a6a6a6;font-size:.6875rem}
.current-lesson strong{display:block;color:#ddd;font-size:.8125rem;font-weight:600;overflow-wrap:anywhere}
.lesson-picker-row .top-home-link{border:0;padding:8px 0 8px 12px}
.top-navigation .section-nav{padding-left:12px}
.top-navigation .section-nav [role=tab]{font-size:.75rem;padding:8px 11px}
.lesson-subnav [role=tab]{font-size:.75rem;padding:6px 11px}
.workspace-page .lesson-drawer{inset:var(--picker-height,58px) auto var(--shell-height) 12px;width:min(350px,calc(100vw - 24px));border:1px solid #525965;border-radius:0 0 10px 10px}
.lesson-welcome{display:none;padding:24px 4px}
.choosing-lesson .lesson-welcome{display:block}
.choosing-lesson .app-main>:not(.lesson-welcome),.choosing-lesson .top-navigation,.choosing-lesson .lesson-subnav,.choosing-lesson .reading-progress{display:none}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.lesson-picker-row{padding:8px 10px;gap:10px}.lesson-picker-row .menu-toggle{padding:6px 8px}.current-lesson strong{font-size:.75rem}.workspace-page .lesson-drawer{left:8px;width:calc(100vw - 16px)}}

/* Keep lesson identity and small progress stats in the header, not the reading pane. */
.current-lesson h1{font-size:.8125rem;font-weight:600;line-height:1.4;letter-spacing:0;margin:0;color:#ddd;overflow-wrap:anywhere}
.app-main>.course-banner,.app-main>.breadcrumbs,.app-main>.workspace-heading,.app-main>.overview-strip,#lesson>.section-heading{display:none}
.lesson-picker-row .top-stats{flex:none;font-size:.6875rem;gap:12px;align-items:center}
.lesson-picker-row .top-stats b{font-size:.8125rem;font-weight:600}
.lesson-picker-row .top-stats .section-icon{width:14px;height:14px;margin-right:5px}
.course-progress-details{display:flex;flex-wrap:wrap;align-items:center;gap:20px;border-top:1px solid var(--border);margin-top:20px;padding-top:16px}
.course-progress-details .compact-progress{align-items:flex-start}
@media(max-width:1100px){.lesson-picker-row{flex-wrap:wrap}.lesson-picker-row .top-stats{order:4;width:100%;justify-content:flex-start;gap:16px}}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.current-lesson h1{font-size:.75rem}.lesson-picker-row .top-stats{gap:10px;flex-wrap:wrap}.lesson-picker-row .top-stats b{font-size:.75rem}}

/* A lesson is one reading page; course tools stay beside overall progress. */
.course-tools{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.course-tools button{display:inline-flex;align-items:center;font-size:.6875rem;padding:4px 7px;white-space:nowrap}
.course-tools button[aria-pressed=true]{color:#fff;border-color:#78ade3;background:#094771}
.continuous-lesson #practical{margin-top:28px;padding-top:22px;border-top:1px solid #52776f}
#lesson.continuous-lesson{background:#242a32;border-top:3px solid #78ade3}
.app-main>#notes-section{background:#2b2733;border-top:3px solid #b39bdb}
.app-main>#knowledge{background:#302b23;border-top:3px solid #dfb46d}
.app-main>#skills{background:#252e26;border-top:3px solid #8cbd88}
.app-main>#journal{background:#30262c;border-top:3px solid #d69cac}
.app-main>#exam-guide{background:#232e33;border-top:3px solid #82c5d5}
@media(max-width:1400px){.lesson-picker-row{flex-wrap:wrap}.lesson-picker-row .top-stats{order:4;width:auto}.course-tools{order:5}.lesson-picker-row .top-home-link{margin-left:auto}}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.course-tools{width:100%}}

/* Four compact tabs belong only to the selected lesson. */
.lesson-tabs{display:flex;flex:none;gap:4px;padding:0 12px;background:#25272c;border-bottom:1px solid var(--border);overflow-x:auto;scrollbar-width:thin}
.lesson-tabs button{display:inline-flex;align-items:center;flex:none;background:transparent;border:0;border-bottom:2px solid transparent;border-radius:0;color:#bfc5ce;font-size:.75rem;padding:9px 12px;white-space:nowrap}
.lesson-tabs button:hover{background:#333841;color:#fff}
.lesson-tabs button[aria-selected=true]{color:#9cdcfe;border-bottom-color:#78ade3;background:#2e3540}
.lesson-tabs button[aria-controls=practical] .section-icon{color:#69c5b3}
.lesson-tabs button[aria-controls=notes-section] .section-icon{color:#b39bdb}
.lesson-tabs button[aria-controls=knowledge] .section-icon{color:#dfb46d}
.app-main>#lesson{background:#242a32;border-top:3px solid #78ade3}
.app-main[data-section=practical]>#lesson{background:#222e2c;border-top-color:#69c5b3}
.learning-full-view .lesson-tabs{display:none}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.lesson-tabs{padding:0 6px}.lesson-tabs button{padding:8px 9px}}

/* Spacious lesson browsing and a more welcoming study surface. */
.workspace-page{--border:#3b4655;--muted:#adb9c8;--accent:#8bc5ff;background:#171d26}
.workspace-page .lesson-drawer{width:min(560px,calc(100vw - 24px));padding:0 20px 22px;background:#202936;border-color:#50647e;border-radius:0 0 16px 16px;box-shadow:12px 18px 50px #0008}
.lesson-drawer .drawer-heading{background:#202936;padding:18px 0 14px}
.drawer-heading strong{font-size:1.1rem;letter-spacing:-.02em}
.lesson-drawer .lesson-search input{background:#151e2b;border-color:#465970;padding:12px 14px;border-radius:9px}
.lesson-drawer .exam-heading{font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;margin:20px 0 4px;color:#8dd6cf}
.lesson-drawer .track-group>summary{background:#2b3748;padding:13px 12px;border:1px solid #405169;border-radius:9px;color:#e0e9f4}
.lesson-drawer .track-group nav{padding:5px 0}
.lesson-drawer .lesson-link{padding:12px;gap:14px;border:1px solid transparent;border-radius:9px;color:#cbd6e5;transition:background .15s,border-color .15s}
.lesson-drawer .lesson-link:hover{background:#2b3b4f;border-color:#48617d;color:#fff}
.lesson-drawer .lesson-link.selected{background:var(--t-panel,#232d3b);border-color:#5688b4;box-shadow:inset 3px 0 #8bc5ff;color:#fff}
.lesson-drawer .lesson-number{color:#95b8d9;font-size:.75rem;padding-top:2px}
.lesson-drawer .next-card{background:#263c3d;border:1px solid #44635f;border-radius:10px;padding:16px}
.lesson-drawer .next-card .eyebrow{color:#91d3be}
.lesson-picker-row{background:var(--t-panel,#232d3b);border-bottom-color:#43516a;padding-top:12px;padding-bottom:12px}
.current-lesson h1{color:#edf4ff;font-size:.95rem}
.current-lesson span{color:#a8bfd9;margin-bottom:3px}
.lesson-picker-row .menu-toggle{background:#304b68;border-color:#577b9e;border-radius:9px;padding:8px 12px}
.lesson-picker-row .top-stats>span{background:#17233180;border:1px solid #3b4b5d;border-radius:20px;padding:4px 10px}
.lesson-tabs{background:#202832;padding-top:4px;gap:6px}
.lesson-tabs button{border-radius:8px 8px 0 0;padding:10px 15px}
.lesson-tabs button[aria-selected=true]{background:#304057;color:#c2e3ff;border-bottom-color:#90caff}
.reading-progress{background:#1d2733;border-bottom-color:#39485b}
.app-main{background:var(--t-panel,#232d3b);padding:24px 28px}
.app-main>section{box-shadow:0 8px 26px #0002;border-color:#435269;padding:26px;border-radius:14px}
.app-main>#lesson{background:var(--t-panel,#232d3b);border-top-color:#90caff}
.app-main[data-section=practical]>#lesson{background:var(--t-panel,#232d3b)}
.lesson-copy>p:first-of-type{color:#e0e8f3;font-size:1.06rem;line-height:1.8}
.beginner-guide>h3{color:#e1edf9;padding-bottom:9px;border-bottom:1px solid #42536b}
.learning-tip{background:#2b3d35;border-left-color:#99c99d}
.understanding-check{background:#303047;border-color:#555474;border-radius:12px}
.command-block{border-color:#435773;border-left-color:#80b8ed;box-shadow:0 4px 14px #0002}
.command-label{background:#2a384b;color:#aec5de}
.source-card{background:#22383e;border-color:#41606b;padding:20px;border-radius:12px}
.lesson-welcome{position:relative;overflow:hidden;padding:clamp(26px,5vw,70px);margin:12px 0;background:var(--t-panel,#232d3b);border:1px solid #4b657e;border-radius:18px;box-shadow:0 16px 40px #0002}
.lesson-welcome::before{content:'';display:block;width:48px;height:4px;border-radius:4px;background:#88d5c6;margin-bottom:24px}
.lesson-welcome h1{font-size:clamp(1.6rem,3vw,2.5rem);letter-spacing:-.035em;max-width:22ch}
.lesson-welcome p{max-width:55ch;color:#bfcedf;margin:18px 0 26px}
.lesson-welcome button{background:#a6d9cf;color:#172b2a;border-color:#a6d9cf;border-radius:9px;padding:11px 18px}
.lesson-welcome button:hover{background:#beeade}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .workspace-page .lesson-drawer{left:8px;width:calc(100vw - 16px);padding:0 12px 16px}
 .lesson-drawer .lesson-link{gap:9px;padding:11px 8px}
 .current-lesson h1{font-size:.8rem}
 .lesson-picker-row .top-stats>span{padding:3px 7px}
 .app-main{padding:12px}.app-main>section{padding:18px}
 .lesson-tabs button{padding:9px}.lesson-welcome{margin:0}
}
@media(prefers-reduced-motion:reduce){.lesson-drawer .lesson-link{transition:none}}

/* Four coordinated dark palettes, shared by navigation and reading surfaces. */
.workspace-page[data-theme]{--t-bg:#19212c;--t-panel:#232d3b;--t-raised:#2b3b50;--t-top:#202936;--t-edge:#455b75;--t-accent:#a4d4ff;--t-muted:#b2c3d8;--t-glow:#304f65;--t-code:#151e2b;--border:var(--t-edge);--muted:var(--t-muted);--accent:var(--t-accent)}
.workspace-page[data-theme=graphite]{--t-bg:#18191b;--t-panel:#242628;--t-raised:#34373a;--t-top:#202224;--t-edge:#53585e;--t-accent:#e2c393;--t-muted:#c1beb8;--t-glow:#494238;--t-code:#161719}
.theme-chooser{display:flex;align-items:center;flex:none;gap:7px;padding:7px 16px;background:var(--t-top);border-bottom:1px solid var(--t-edge);overflow-x:auto}
.theme-chooser>span{color:var(--t-muted);font-size:.7rem;margin-right:5px}
.theme-chooser button{display:inline-flex;align-items:center;gap:7px;flex:none;padding:4px 10px;border-radius:20px;background:transparent;border:1px solid transparent;color:var(--t-muted);font-size:.7rem;font-weight:500}
.theme-chooser button::before{content:'';width:10px;height:10px;border-radius:50%;background:#a4d4ff;box-shadow:0 0 0 2px #ffffff15}
.theme-chooser button[data-theme=graphite]::before{background:#e2c393}
.theme-chooser button:hover{background:var(--t-raised);color:#fff}
.theme-chooser button[aria-pressed=true]{border-color:var(--t-accent);background:var(--t-raised);color:#fff}
[data-theme] .app-main{background:var(--t-panel,#232d3b);scrollbar-color:var(--t-edge) var(--t-bg)}
[data-theme] .lesson-picker-row{background:var(--t-panel,#232d3b);border-color:var(--t-edge)}
[data-theme] .lesson-tabs,[data-theme] .reading-progress,[data-theme] .terminal-heading{background:var(--t-top);border-color:var(--t-edge)}
[data-theme] .lesson-tabs button[aria-selected=true],[data-theme] .lesson-picker-row .menu-toggle{background:var(--t-raised);color:var(--t-accent);border-color:var(--t-accent)}
[data-theme] .current-lesson span,[data-theme] .reading-progress output{color:var(--t-muted)}
[data-theme] .lesson-picker-row .top-stats>span{background:var(--t-code);border-color:var(--t-edge)}
[data-theme] .app-main>section,[data-theme] .app-main>#lesson,[data-theme] .app-main[data-section=practical]>#lesson{background:var(--t-panel,#232d3b);border-color:var(--t-edge);border-top-color:var(--t-accent)}
[data-theme] .lesson-copy>h3:first-child,[data-theme] .lesson-drawer .exam-heading{color:var(--t-accent)}
[data-theme] .lesson-welcome{background:var(--t-panel,#232d3b);border-color:var(--t-edge)}
[data-theme] .lesson-welcome::before,[data-theme] .lesson-welcome button{background:var(--t-accent);border-color:var(--t-accent)}
[data-theme] .lesson-welcome button{color:var(--t-code)}
[data-theme] .lesson-welcome p{color:var(--t-muted)}
.workspace-page[data-theme] .lesson-drawer,[data-theme] .lesson-drawer .drawer-heading{background:var(--t-top);border-color:var(--t-edge)}
[data-theme] .lesson-drawer .track-group>summary,[data-theme] .lesson-drawer .lesson-link:hover{background:var(--t-raised);border-color:var(--t-edge)}
[data-theme] .lesson-drawer .lesson-link.selected{background:var(--t-glow);border-color:var(--t-accent);box-shadow:inset 3px 0 var(--t-accent)}
[data-theme] .lesson-drawer .lesson-number{color:var(--t-muted)}
[data-theme] .lesson-drawer .lesson-search input,[data-theme] pre,[data-theme] .inline-command{background:var(--t-code);border-color:var(--t-edge)}
[data-theme] .command-label{background:var(--t-raised);color:var(--t-muted)}
[data-theme] .command-block,[data-theme] .beginner-guide>h3{border-color:var(--t-edge)}
[data-theme] .command-block{border-left-color:var(--t-accent)}
[data-theme] .source-card,[data-theme] .understanding-check,[data-theme] .lesson-drawer .next-card{background:var(--t-top);border-color:var(--t-edge)}
[data-theme] .quiet{color:var(--t-muted);border-color:var(--t-edge)}
[data-theme] :focus-visible{outline-color:var(--t-accent)}
[data-theme] .reading-progress input[type=range]{accent-color:var(--t-accent)}
.learning-full-view .theme-chooser{display:none}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.theme-chooser{gap:3px;padding:6px 10px}.theme-chooser button{padding:5px 7px;font-size:.68rem}.theme-chooser>span{margin-right:2px}}

/* Flat, near-black surfaces with restrained accent light on interaction. */
.workspace-page[data-theme=graphite]{--t-bg:#0a0a0a;--t-panel:#131313;--t-raised:#20201e;--t-top:#101010;--t-edge:#38352f;--t-accent:#ff8a42;--t-muted:#bdb7ac;--t-glow:#302118;--t-code:#0c0c0c;color:#f4f1ea}
[data-theme] .app-main{background:var(--t-bg)}
[data-theme] .lesson-picker-row{background:var(--t-top)}
[data-theme] .lesson-welcome{background:var(--t-panel);box-shadow:none;border-radius:10px}
[data-theme] .app-main>section{box-shadow:none;border-radius:10px}
[data-theme] .lesson-copy>p:first-of-type,[data-theme] .current-lesson h1,[data-theme] .beginner-guide>h3{color:#f4f1ea}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;flex:none;width:36px;height:36px;padding:7px;order:0}
.theme-chooser{position:fixed;z-index:60;display:flex;flex-direction:column;align-items:stretch;width:190px;padding:8px;gap:4px;border:1px solid var(--t-edge);border-radius:10px;background:var(--t-top);box-shadow:0 12px 32px #0008;overflow:visible}
.theme-chooser button{font-size:.8rem;padding:10px 12px;border-radius:6px;gap:10px}
.theme-chooser button[data-theme=graphite]::before{background:#ff8a42}
.theme-chooser button[aria-pressed=true]::after{content:'✓';margin-left:auto;color:var(--t-accent)}
[data-theme] a,[data-theme] button,[data-theme] .track-group>summary{transition:color .16s,text-shadow .16s,box-shadow .16s,border-color .16s}
@media(hover:hover){
 [data-theme] a:hover{color:var(--t-accent);text-shadow:0 0 12px color-mix(in srgb,var(--t-accent) 60%,transparent)}
 [data-theme] .lesson-drawer .lesson-link:hover,[data-theme] .topic:hover,[data-theme] .track-group>summary:hover,[data-theme] .theme-toggle:hover,[data-theme] .course-tools button:hover,[data-theme] .lesson-tabs button:hover{color:var(--t-accent);border-color:var(--t-accent);box-shadow:0 0 14px color-mix(in srgb,var(--t-accent) 18%,transparent);text-shadow:0 0 12px color-mix(in srgb,var(--t-accent) 45%,transparent)}
}
[data-theme] a:focus-visible{color:var(--t-accent);box-shadow:0 0 12px color-mix(in srgb,var(--t-accent) 22%,transparent)}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .lesson-picker-row{gap:8px}
 .lesson-picker-row .current-lesson{flex-basis:0}
 .lesson-picker-row .top-stats{width:100%;flex-wrap:wrap}
 .lesson-picker-row .theme-toggle{margin-left:auto}
 .lesson-picker-row .top-home-link{margin-left:0;padding-left:4px}
}
@media(prefers-reduced-motion:reduce){[data-theme] a,[data-theme] button,[data-theme] .track-group>summary{transition:none}}

/* Neutral alternatives replace Forest and Plum; every surface stays flat. */
.workspace-page[data-theme=dark]{--t-bg:#050505;--t-panel:#0b0b0b;--t-raised:#181818;--t-top:#080808;--t-edge:#303030;--t-accent:#e8e8e8;--t-muted:#b8b8b8;--t-glow:#202020;--t-code:#030303}
.workspace-page[data-theme=slate]{--t-bg:#17191c;--t-panel:#202327;--t-raised:#2a2e33;--t-top:#1c1f22;--t-edge:#474c54;--t-accent:#b9c8dc;--t-muted:#b8bec7;--t-glow:#303840;--t-code:#131518}
.theme-chooser button[data-theme=dark]::before{background:#e8e8e8}
.theme-chooser button[data-theme=slate]::before{background:#b9c8dc}

/* Pulse the actual border color, preserving its width, sides, and shape. */
@keyframes border-brightness{
  0%,100%{border-color:var(--t-edge)}
  50%{border-color:var(--t-accent)}
}
@media(hover:hover){
 .workspace-page[data-theme] .border-pulse-control:hover{animation:border-brightness 3s ease-in-out infinite;box-shadow:none;text-shadow:none}
}
.workspace-page[data-theme] .border-pulse-control:focus-visible{animation:border-brightness 3s ease-in-out infinite}
@media(prefers-reduced-motion:reduce){
 .workspace-page[data-theme] .border-pulse-control:is(:hover,:focus-visible){animation:none;border-color:var(--t-accent)}
}
/* Brighter symbols use a complementary highlight within each palette. */
.workspace-page[data-theme]{--icon-color:#79d9ff;--icon-detail:#b9a7ff}
.workspace-page[data-theme=graphite]{--icon-color:#ffc078;--icon-detail:#ffd9a3}
.workspace-page[data-theme=dark]{--icon-color:#f0f3fa;--icon-detail:#b6c7df}
.workspace-page[data-theme=slate]{--icon-color:#9fd5fa;--icon-detail:#d4c5f5}
.workspace-page[data-theme] :is(.section-icon,.terminal-icon,.expand-arrow,.lesson-expand,.tip>span){color:var(--icon-color)}
.workspace-page[data-theme] :is(.menu-toggle,.theme-toggle)>svg{color:var(--icon-color)}
.workspace-page[data-theme] .section-icon{stroke-width:2}
.workspace-page[data-theme] .lesson-drawer .track-group>summary .section-icon{color:var(--icon-color);width:1.25em;height:1.25em}
.workspace-page[data-theme] .lesson-link>span:last-child{color:var(--icon-color);font-weight:700}
.workspace-page[data-theme] :is(.stats,.course-tools,.lesson-tabs) .section-icon{color:var(--icon-detail)}

/* Give compact interface text more weight without crowding the reading copy. */
.workspace-page :is(.current-lesson>span,.top-stats,.course-tools button,.top-home-link,.reading-progress,.lesson-tabs button,.theme-chooser button,.lesson-search,.track-group>summary,.lesson-number,.command-label,.terminal-tools button,#terminal-status,.terminal-foot){font-weight:600}
.workspace-page .lesson-link{font-weight:550}
.workspace-page :is(.current-lesson>span,.command-label,#terminal-status){color:var(--t-muted)}
.workspace-page .top-stats b{font-weight:750}
.workspace-page .track-group>summary small{font-weight:600;color:var(--t-muted)}

@font-face{font-family:Inter;src:url('/static/inter.ttf') format('truetype');font-style:normal;font-weight:100 900;font-display:swap}
:root{--type-body:1rem;--type-small:.8125rem;--type-caption:.75rem;--type-h1:1.75rem;--type-h2:1.375rem;--type-h3:1.125rem;--type-h4:1rem}
body{font-family:Inter,system-ui,sans-serif;font-size:var(--type-body);line-height:1.7;font-optical-sizing:auto}
button,input,textarea,select{font-family:inherit}
.workspace-page :is(h1,h2,h3,h4,p,label,summary,legend,.lesson-number,#notes){font-family:Inter,system-ui,sans-serif}
.workspace-page h1,.login h1{font-size:var(--type-h1);font-weight:700;line-height:1.25;letter-spacing:-.025em}
.workspace-page h2{font-size:var(--type-h2);font-weight:700;line-height:1.35;letter-spacing:-.015em}
.workspace-page h3{font-size:var(--type-h3);font-weight:650;line-height:1.4;letter-spacing:normal}
.workspace-page h4{font-size:var(--type-h4);font-weight:650;line-height:1.5;letter-spacing:normal}
.workspace-page :is(#theory,#practical){text-transform:none;letter-spacing:normal;font-size:1rem}
.workspace-page :is(.lesson-copy p,.objective-guides details p,.reading-links p,#theory p,#practical p,.beginner-guide,.guide-example){font-size:var(--type-body);line-height:1.75}
.workspace-page .current-lesson h1{font-size:var(--type-body);line-height:1.4;letter-spacing:normal}
.workspace-page :is(.lesson-tabs button,.course-tools button,.reading-tools button,.terminal-tools button,.theme-chooser button,.top-home-link,.track-group>summary,.lesson-link){font-family:Inter,system-ui,sans-serif;font-size:var(--type-small);font-weight:600;line-height:1.5}
.workspace-page :is(.current-lesson>span,.top-stats,.command-label,.lesson-number,.terminal-foot,#terminal-status){font-family:Inter,system-ui,sans-serif;font-size:var(--type-caption);line-height:1.5}
.workspace-page :is(.shell-title,.shell-tab){font-family:Inter,system-ui,sans-serif;font-size:var(--type-small);line-height:1.5}
.workspace-page .lesson-picker-row .top-stats b{font-size:var(--type-small)}
.reading-edge{position:absolute;right:0;bottom:0;width:5px;z-index:20;background:var(--t-edge);pointer-events:none;overflow:visible}
.reading-edge>span{display:block;width:100%;height:0;background:var(--t-accent)}
.reading-edge-percent{position:absolute;right:0;bottom:100%;min-width:44px;padding:3px 7px;background:var(--t-top);border:1px solid var(--t-edge);border-radius:5px 0 0 0;color:var(--t-accent);font-size:.7rem;font-weight:700;line-height:1.4;text-align:center;font-variant-numeric:tabular-nums}
.reading-tools{display:flex;flex:none;align-items:center;gap:6px;order:6}
.reading-tools button{font-weight:600;padding:4px 7px;white-space:nowrap}
.choosing-lesson .reading-edge,.choosing-lesson .reading-tools{display:none}
.workspace-page .app-main{scrollbar-width:none}
.workspace-page .app-main::-webkit-scrollbar{display:none}
.workspace-page[data-theme] .app-main{padding-top:36px;padding-right:56px}
.lesson-tabs{padding-right:50px}
.welcome-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.resume-link{display:inline-flex;align-items:center;padding:11px 18px;border:1px solid var(--t-accent);border-radius:9px;background:var(--t-accent);color:var(--t-code);font-size:var(--type-small);font-weight:650}
[data-theme] .resume-link:hover{color:var(--t-code);text-shadow:none;filter:brightness(1.12)}
.workspace-page .welcome-actions button{font-size:var(--type-small);background:transparent;color:var(--t-accent);border-color:var(--t-edge)}
.workspace-page .lesson-welcome .resume-description{margin:16px 0 0;font-size:var(--type-small);color:var(--t-muted)}
.resume-link[aria-disabled=true]{background:var(--t-raised);color:var(--t-muted);border-color:var(--t-edge);cursor:default;filter:none}
.lesson-search-results{display:grid;gap:8px}
.search-result{padding:8px 0;border-bottom:1px solid var(--t-edge)}
.search-result-context,.search-result-count{color:var(--t-muted);font-size:var(--type-caption);line-height:1.5;margin:0 12px 4px;font-weight:600}
.search-result-count{margin:0 0 12px;color:var(--t-accent)}
.topic-search-button{width:100%;text-align:left;padding:12px;font-size:var(--type-small);font-weight:600;color:var(--t-accent)}
.source-reference-group+.source-reference-group{margin-top:28px;padding-top:24px;border-top:1px solid var(--t-edge)}
.source-reference-links{list-style:none;padding:0;margin:16px 0;display:grid;gap:10px}
.source-reference-links a{display:inline-block;overflow-wrap:anywhere;font-size:var(--type-small);font-weight:500}
.workspace-page[data-theme] .lesson-welcome{padding:0;margin:0;background:transparent;border:0;box-shadow:none}
.lesson-welcome::before{display:none}
.workspace-page .lesson-welcome h1{font-size:var(--type-h1)}
.workspace-page .lesson-welcome>p{margin:10px 0 22px;max-width:none}
.library-feature{display:grid;grid-template-columns:minmax(200px,.8fr) minmax(0,2fr);border:1px solid var(--t-edge);border-radius:14px;overflow:hidden;background:var(--t-panel)}
.course-art{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:28px;background:var(--t-code);color:var(--t-accent);border-right:1px solid var(--t-edge)}
.course-art-kicker{font-size:var(--type-caption);font-weight:600;letter-spacing:.06em}
.course-art svg{width:100%;max-width:240px;height:110px;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.course-art strong{font-size:2.6rem;line-height:1.2;letter-spacing:-.04em;font-weight:750}
.course-art>span:last-child{font-size:var(--type-caption);letter-spacing:.12em}
.library-course-copy{padding:28px;min-width:0}
.course-status{display:inline-block;color:var(--icon-color);font-size:var(--type-caption);font-weight:600;margin-bottom:12px}
.course-status::before{content:'';display:inline-block;width:6px;height:6px;border-radius:50%;background:currentColor;margin-right:7px;vertical-align:middle}
.workspace-page .lesson-welcome .library-course-copy>p{margin:12px 0 18px;max-width:64ch}
.workspace-page .lesson-welcome .library-course-meta{font-size:var(--type-small);color:var(--t-accent)}
.future-courses{margin-top:32px}
.workspace-page .lesson-welcome .future-courses>p{margin:8px 0 18px;font-size:var(--type-small)}
.future-course-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.future-course{padding:20px;border:1px solid var(--t-edge);border-radius:10px;background:var(--t-top)}
.future-course-mark{display:flex;width:42px;height:42px;align-items:center;justify-content:center;border:1px solid var(--t-edge);border-radius:8px;color:var(--icon-detail);font-weight:700;margin-bottom:16px}
.workspace-page .lesson-welcome .future-course p{font-size:var(--type-small);margin:6px 0 14px}
.future-course small{font-size:var(--type-caption);color:var(--t-muted)}
.future-course-link{display:block;margin-top:12px;font-size:var(--type-caption);font-weight:600}
@media(max-width:1000px){.future-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.reading-edge{width:4px}.workspace-page .current-lesson h1{font-size:var(--type-small)}.welcome-actions{align-items:stretch;flex-direction:column}.welcome-actions>a{justify-content:center}.library-feature{grid-template-columns:1fr}.course-art{padding:20px;border-right:0;border-bottom:1px solid var(--t-edge);gap:6px}.course-art svg{height:70px}.course-art strong{font-size:2rem}.library-course-copy{padding:20px}.future-course-grid{grid-template-columns:1fr}.future-course{padding:16px}}
.workspace-page .lesson-picker-row{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:10px 16px;padding:10px 16px}
.header-left,.header-right{display:flex;align-items:center;gap:10px;min-width:0}
.header-left{grid-column:1;grid-row:1}
.header-right{grid-column:3;grid-row:1;justify-content:flex-end;flex-wrap:wrap}
.header-left>.current-lesson{flex:1;min-width:0}
.lesson-picker-row .header-right>.top-stats{order:0;width:auto;flex-wrap:wrap}
.header-right>.course-tools,.header-right>.reading-tools{order:0;width:auto;margin:0}
.header-right>.theme-toggle{margin:0;min-width:36px}
.lesson-picker-row>.top-home-link{grid-column:2;grid-row:1;align-self:center;margin:0;padding:10px 14px;min-height:44px;border:1px solid var(--t-edge);border-radius:9px;font-weight:700}
.lesson-picker-row>.top-home-link span{display:inline}
.lesson-picker-row>.top-home-link .section-icon{margin-right:8px}
@media(max-width:1100px){
 .workspace-page .lesson-picker-row{display:flex;flex-wrap:wrap;align-items:center}
 .header-left,.header-right{display:contents}
 .header-left>.menu-toggle{order:0}
 .lesson-picker-row>.top-home-link{order:1;margin:0 auto}
 .header-right>.theme-toggle{order:2}
 .header-left>.current-lesson{order:3;flex-basis:100%}
 .lesson-picker-row .header-right>.top-stats{display:flex;order:4;flex-basis:100%}
 .header-right>.course-tools{order:5;justify-content:flex-start}
 .header-right>.reading-tools{order:6;margin-left:auto}
}

/* Borderless surface trial; previous stylesheet is saved in backups. */
.workspace-page[data-theme] .app-main>section,
.workspace-page[data-theme] .app-main>#lesson,
.workspace-page[data-theme] .app-main[data-section=practical]>#lesson{
 border:0;background:var(--t-panel);border-radius:16px;box-shadow:0 3px 12px #0002;
}
.workspace-page[data-theme] .app-main :is(.source-card,.understanding-check,.reading-links li,.topic,.future-course){
 border:0;background:var(--t-raised);border-radius:12px;box-shadow:none;
}
.workspace-page[data-theme] .app-main :is(.library-feature,.course-art){border:0}
.workspace-page[data-theme] .library-feature{background:var(--t-panel);border-radius:16px;box-shadow:0 3px 12px #0002}
.library-feature-az{margin-top:14px}
.library-feature-az .course-art{background:color-mix(in srgb,var(--t-accent) 14%,var(--t-panel));}
.library-feature-az .course-art svg{stroke:var(--t-accent);stroke-width:2;}
.az-module-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:20px}
.az-local-tabs{display:none}
.az-local-link{display:flex;align-items:center;gap:9px;min-height:72px;padding:10px;text-align:left;background:var(--t-panel);border:1px solid var(--t-edge);border-radius:10px;color:var(--t-text)}
.az-local-link:hover,.az-local-link.selected{border-color:var(--t-accent);color:var(--t-text);box-shadow:0 0 0 1px color-mix(in srgb,var(--t-accent) 35%,transparent)}
.az-local-link>span:last-child{display:grid;gap:3px;min-width:0}
.az-local-link strong{font-size:var(--type-small);line-height:1.2}
.az-local-link small{color:var(--t-muted);font-size:.68rem;line-height:1.25}
.az-lesson-panel{padding-top:4px}
.az-lesson-intro{font-size:1.05rem;color:var(--t-muted);max-width:70ch}
.az-theory,.az-practical,.az-knowledge{margin-top:18px;padding:20px;background:var(--t-panel);border:1px solid var(--t-edge);border-radius:14px}
.az-theory h3,.az-practical h3,.az-knowledge h3{margin-top:0}
.az-theory details{border-top:1px solid color-mix(in srgb,var(--t-edge) 75%,transparent);padding:0 4px}
.az-theory summary{padding:13px 0;font-weight:700}
.az-theory details p{color:var(--t-muted);max-width:75ch}
.az-knowledge{background:color-mix(in srgb,var(--t-panel) 78%,var(--t-accent) 3%)}
.az-answer{border-top:1px solid color-mix(in srgb,var(--t-edge) 75%,transparent);padding:0 4px}
.az-answer summary{padding:12px 0;font-weight:700}
.az-answer p{margin:0 0 14px;color:var(--t-muted)}
.az-lesson-link{display:flex;align-items:center;gap:10px;text-align:left}
.az-lesson-link strong{font-size:var(--type-small)}
.az-lesson-link>span:last-child{display:block}
.az-lesson-link small{display:none}
.az-lesson-symbol{display:grid!important;place-items:center;width:30px;height:30px;border-radius:9px;background:color-mix(in srgb,var(--t-accent) 16%,var(--t-panel));color:var(--t-accent);font-weight:800;font-size:1.1rem}
.az-module{padding:20px;background:var(--t-panel);border:1px solid var(--t-edge);border-radius:14px;min-height:280px}
.az-module-heading{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.az-module-heading h3{margin:2px 0 0;font-size:var(--type-h3)}
.az-module-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:color-mix(in srgb,var(--t-accent) 18%,var(--t-panel));color:var(--t-accent);font-weight:800;letter-spacing:.04em}
.az-module>p{color:var(--t-muted)}
.az-module-units{display:grid;gap:8px;margin-top:14px}
.az-module-units details{background:var(--t-surface);border:1px solid color-mix(in srgb,var(--t-edge) 80%,transparent);border-radius:9px;padding:0 12px}
.az-module-units summary{padding:10px 0;font-weight:700;font-size:var(--type-small)}
.az-module-units details p{margin:0 0 12px;color:var(--t-muted);font-size:var(--type-small);line-height:1.55}
.az-check{margin:16px 0 0!important;padding-top:12px;border-top:1px solid color-mix(in srgb,var(--t-edge) 70%,transparent);font-size:var(--type-small)}
@media(max-width:860px){.az-module-grid{grid-template-columns:1fr}}
.workspace-page[data-theme] .course-art{background:var(--t-raised)}
.workspace-page[data-theme] .app-main :is(.command-block,.worked-example){border:0;background:var(--t-code);border-radius:10px;box-shadow:none}
.workspace-page[data-theme] .app-main .command-label{background:var(--t-raised)}
.workspace-page[data-theme] .app-main pre{border:0;border-radius:10px;background:var(--t-code)}
.workspace-page[data-theme] .app-main :is(.command-block,.worked-example) pre{border-radius:0}
.workspace-page[data-theme] .app-main :is(.learning-tip,.expected-result,.tip){border:0;border-radius:10px;background:var(--t-raised);color:var(--t-muted)}
.workspace-page[data-theme] .app-main :is(.section-heading,.beginner-guide>h3,.objective-guides>h3,.guide-example,.understanding-check details){border:0}
.workspace-page[data-theme] .app-main fieldset{border:0;border-radius:12px;background:var(--t-top);padding:16px}
.workspace-page[data-theme] .app-main .choice{background:var(--t-raised);border-radius:8px}
/* End borderless surface trial. */

/* Navigation uses the same rounded, borderless surfaces as the content. */
.workspace-page[data-theme] :is(.lesson-picker-row,.lesson-tabs){border:0;background:var(--t-top)}
.workspace-page[data-theme] .lesson-picker-row :is(button,.top-home-link),
.workspace-page[data-theme] .lesson-tabs button{
 border:0;border-radius:9px;background:var(--t-raised);box-shadow:none;padding:8px 12px;
}
.workspace-page[data-theme] .lesson-picker-row .top-stats>span{border:0;border-radius:9px;background:var(--t-panel);padding:6px 10px}
.workspace-page[data-theme] .lesson-tabs{gap:8px;padding-top:8px;padding-bottom:8px}
.workspace-page[data-theme] .lesson-tabs button{background:transparent;color:var(--t-muted)}
.workspace-page[data-theme] .lesson-tabs button[aria-selected=true],
.workspace-page[data-theme] .lesson-picker-row button:is([aria-expanded=true],[aria-pressed=true]){background:var(--t-glow);color:var(--t-accent);box-shadow:none}
.workspace-page[data-theme] .theme-chooser{background:var(--t-panel);border:0;border-radius:12px;box-shadow:0 8px 24px #0004}
.workspace-page[data-theme] .theme-chooser button{background:transparent;text-align:left}
.workspace-page[data-theme] .theme-chooser button[aria-pressed=true]{background:var(--t-raised)}
.workspace-page[data-theme] .lesson-drawer{border:0;border-radius:0 0 14px 14px;background:var(--t-top)}
.workspace-page[data-theme] .lesson-drawer .track-group>summary{border:0;background:var(--t-raised);border-radius:10px}
.workspace-page[data-theme] .lesson-drawer .lesson-link{border:0;border-radius:9px}
.workspace-page[data-theme] .lesson-drawer .lesson-link.selected{background:var(--t-glow);box-shadow:none;color:var(--t-accent)}
@keyframes navigation-surface-pulse{0%,100%{background-color:var(--t-raised)}50%{background-color:var(--t-glow)}}
@media(hover:hover){
 .workspace-page[data-theme] :is(.lesson-picker-row,.lesson-tabs,.lesson-drawer) .border-pulse-control:hover{animation:navigation-surface-pulse 3s ease-in-out infinite;color:var(--t-accent)}
}
@media(prefers-reduced-motion:reduce){
 .workspace-page[data-theme] :is(.lesson-picker-row,.lesson-tabs,.lesson-drawer) .border-pulse-control:hover{animation:none;background:var(--t-glow)}
}
/* Only two widths: the outer lesson and a shared width for every inner card. */
.workspace-page #theory{--theory-card-width:60rem}
.workspace-page #theory .beginner-guide{width:100%;max-width:none}
.workspace-page #theory :is(.worked-example,.command-block,.understanding-check,.learning-tip,.source-card,.tip){
 width:100%;max-width:var(--theory-card-width);margin-left:0;margin-right:0;box-sizing:border-box;
}
.workspace-page #theory :is(.understanding-check,.learning-tip,.source-card,.tip){padding:18px 20px}
.workspace-page #theory :is(.worked-example,.command-block){border-radius:12px}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .workspace-page[data-theme] .lesson-picker-row :is(button,.top-home-link){padding:7px 9px}
 .workspace-page[data-theme] .lesson-tabs{gap:4px}
 .workspace-page #theory :is(.understanding-check,.learning-tip,.source-card,.tip){padding:16px}
}

/* Fragment navigation should not outline the entire selected lesson. */
.workspace-page .app-main :is(section,div)[tabindex="0"]:focus{outline:none}
/* One progress surface, followed by one shared group of course tools. */
.workspace-page[data-theme] .lesson-picker-row .top-stats{gap:0;padding:5px;background:var(--t-panel);border:0;border-radius:10px}
.workspace-page[data-theme] .lesson-picker-row .top-stats>span{background:transparent;border:0;border-radius:0;padding:5px 10px}
.workspace-page[data-theme] .lesson-picker-row .course-tools{display:flex;align-items:center;flex-wrap:wrap;gap:3px;padding:4px;background:var(--t-panel);border-radius:10px}
.workspace-page[data-theme] .lesson-picker-row .course-tools .reading-tools{display:flex;align-items:center;flex-wrap:wrap;gap:3px;margin:0;order:0}
.workspace-page[data-theme] .lesson-picker-row .course-tools button{background:transparent;border:0;border-radius:7px}
.workspace-page[data-theme] .lesson-picker-row .course-tools button[aria-pressed=true]{background:var(--t-glow);color:var(--t-accent)}
.course-menu-group{position:relative;display:inline-flex}
.course-menu-popover{position:absolute;top:calc(100% + 8px);left:0;z-index:70;display:grid;min-width:180px;padding:6px;border-radius:10px;background:var(--t-panel);box-shadow:0 10px 28px #0006}
.course-menu-popover[hidden]{display:none}
.course-menu-popover button{width:100%;text-align:left;white-space:nowrap}
.course-picker{display:flex;gap:4px;padding:8px 0 12px}
.course-picker button{flex:1;padding:8px 10px;border:0;border-radius:8px;background:var(--t-raised);color:var(--t-muted);font-size:var(--type-small);font-weight:650}
.course-picker button.selected{background:var(--t-glow);color:var(--t-accent)}
.az-lesson-list{display:grid;gap:7px;margin:4px 0 14px}
.az-lesson-link{display:flex;flex-direction:column;align-items:flex-start;gap:3px;width:100%;padding:11px 12px;border:0;border-radius:9px;background:var(--t-raised);color:var(--t-muted);text-align:left}
.az-lesson-link strong{font-size:var(--type-small);color:var(--t-accent)}
.az-lesson-link small{font-size:var(--type-caption);color:var(--t-muted)}
.course-menu-group>button .section-icon{width:1.1em;height:1.1em;margin-right:5px}
@media(hover:hover){
 .workspace-page[data-theme] .lesson-picker-row :is(button,.top-home-link):hover,
 .workspace-page[data-theme] .lesson-tabs button:hover{animation:none;background:color-mix(in srgb,var(--t-accent) 20%,var(--t-raised));color:var(--t-accent);box-shadow:0 0 12px color-mix(in srgb,var(--t-accent) 12%,transparent);text-shadow:none}
 .workspace-page[data-theme] .lesson-picker-row .top-stats:hover{background:var(--t-raised)}
}

/* Soft, theme-colored breathing highlight while hovering navigation surfaces. */
@keyframes navigation-hover-pulse{
  0%,100%{background-color:var(--t-raised);box-shadow:0 0 0 transparent}
  50%{background-color:color-mix(in srgb,var(--t-accent) 24%,var(--t-raised));box-shadow:0 0 12px color-mix(in srgb,var(--t-accent) 16%,transparent)}
}
@media(hover:hover){
 .workspace-page[data-theme] .lesson-picker-row :is(button,.top-home-link):hover,
 .workspace-page[data-theme] .lesson-tabs button:hover{animation:navigation-hover-pulse 3s ease-in-out infinite}
}
@media(prefers-reduced-motion:reduce){
 .workspace-page[data-theme] .lesson-picker-row :is(button,.top-home-link,.top-stats,.course-tools):hover,
 .workspace-page[data-theme] .lesson-tabs button:hover{animation:none;background-color:var(--t-glow)}
}

/* Only individual controls animate; the containers and statistics stay still. */
.workspace-page[data-theme] .lesson-picker-row .top-stats:hover{animation:none;background:var(--t-panel);box-shadow:none}
.workspace-page[data-theme] .lesson-picker-row .course-tools:hover{animation:none;background:var(--t-panel);box-shadow:none}

/* Vertically align the terminal tip's icon and text, including wrapped text. */
.workspace-page #theory .tip{align-items:center}
.workspace-page #theory .tip>span{display:flex;align-items:center;justify-content:center;flex-shrink:0;line-height:1}
.workspace-page #theory .tip>p{margin:0}

.workspace-page #theory .exam-coverage{width:100%;max-width:var(--theory-card-width);margin-top:24px;padding:16px 20px;border:0;border-radius:12px;background:var(--t-raised)}
.workspace-page #theory .exam-coverage p{font-size:var(--type-small);color:var(--t-muted);margin:14px 0 8px}
.workspace-page #theory .exam-coverage ul{margin:0;padding-left:1.4rem;color:var(--t-muted);font-size:var(--type-small);line-height:1.7}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.workspace-page #theory .exam-coverage{padding:14px 16px}}

/* Match the Daily Ops home surface: quiet top-level charcoal, no extra chrome. */
.workspace-page[data-theme] .lesson-picker-row .top-stats{background:var(--t-top);box-shadow:none}
.workspace-page[data-theme] .lesson-picker-row .top-stats>span{background:var(--t-top)}
.workspace-page[data-theme] .lesson-picker-row .top-stats:hover{background:var(--t-top)}


/* Azure uses the same typography, outline symbols, and selection surface as LPIC. */
.az-lesson-list[hidden]{display:none}
.workspace-page .lesson-drawer .az-lesson-link{
 display:flex;flex-direction:row;align-items:center;gap:14px;
 width:100%;min-width:0;text-align:left;background:transparent;
 font-family:Inter,system-ui,sans-serif;font-size:var(--type-small);font-weight:600;line-height:1.5;
}
.az-lesson-link .section-icon{flex:none;width:1.25em;height:1.25em;margin:0}
.az-lesson-link .az-lesson-title{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.az-lesson-link>span:last-child{flex:none}


/* DevOps lessons share LPIC typography and compact outline-icon navigation. */
.devops-lesson-list[hidden],.devops-lesson[hidden],[data-devops-section][hidden]{display:none}
.devops-lesson-list{display:grid;gap:6px}
.devops-lesson-list .track-group>summary>span:nth-child(2){min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.devops-lesson-list .track-group>summary :is(.expand-arrow,small){flex-shrink:0}
.devops-lesson-link .lesson-number{flex-shrink:0}
.workspace-page .lesson-drawer .devops-lesson-link{
 display:flex;align-items:center;gap:14px;width:100%;min-width:0;background:transparent;
 text-align:left;font-family:Inter,system-ui,sans-serif;font-size:var(--type-small);font-weight:600;line-height:1.5;
}
.devops-lesson-link .section-icon{flex:none;width:1.25em;height:1.25em;margin:0}
.devops-lesson-title{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.devops-lesson-link>span:last-child{flex:none}
#devops .devops-tabs{position:static;display:flex;flex-wrap:nowrap;overflow-x:auto;margin:18px 0}
#devops .devops-tabs button{flex:none;white-space:nowrap}
#devops .devops-lesson{padding:20px;border-radius:14px;background:var(--t-panel)}
#devops .devops-lesson h2{margin-top:0}
#devops .devops-lesson p,#devops .lab-steps{font-size:var(--type-body);line-height:1.75}
#devops .source-card{margin-top:24px;padding:18px 20px}
#devops .source-card a{overflow-wrap:anywhere}
#devops .command-block{max-width:100%;overflow:auto}
#devops .devops-pagination{display:flex;justify-content:space-between;gap:12px;margin-top:20px}
#devops .devops-pagination button{font:inherit;font-size:var(--type-small)}
#devops button:disabled{opacity:.4;cursor:default}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){#devops .devops-lesson{padding:14px}.course-picker button{padding:8px 5px;font-size:.75rem}.devops-lesson-link{gap:9px!important}}

/* DevOps teaching follows the same reading rhythm and inner-card width as LPIC. */
#devops .beginner-guide{width:100%;max-width:none}
#devops :is(.command-block,.learning-tip,.understanding-check,.devops-sources){width:100%;max-width:60rem;box-sizing:border-box}
#devops .learning-tip,#devops .understanding-check{padding:18px 20px;margin:20px 0;border:0;border-radius:12px;background:var(--t-raised)}
#devops .learning-tip :is(h3,p):first-child,#devops .understanding-check h3{margin-top:0}
#devops .devops-unit{padding:14px 0}
#devops .devops-unit summary{font:inherit;font-weight:600;color:var(--t-text)}
#devops .devops-unit p{max-width:85ch}
#devops .example-walkthrough{font-size:var(--type-body);line-height:1.75;padding-left:1.5rem}
#devops .example-walkthrough li,#devops .lab-steps li{margin-bottom:12px}
#devops .devops-sources{margin-top:28px}
#devops .devops-sources summary{font-weight:600}
#devops .devops-sources p{font-size:var(--type-small)}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){#devops .learning-tip,#devops .understanding-check{padding:14px}}

/* Azure uses the same course and lesson layout as LPIC and DevOps. */
.az-lesson-list[hidden],.az-lesson-panel[hidden],[data-az-section][hidden]{display:none}
.az-lesson-list{display:grid;gap:6px}
.az-lesson-list .track-group>summary>span:nth-child(2){min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.az-lesson-list .track-group>summary :is(.expand-arrow,small){flex-shrink:0}
.az-lesson-link .lesson-number{flex-shrink:0}
.workspace-page .lesson-drawer .az-lesson-link{
 display:flex;align-items:center;gap:14px;width:100%;min-width:0;background:transparent;
 text-align:left;font-family:Inter,system-ui,sans-serif;font-size:var(--type-small);font-weight:600;line-height:1.5;
}
.az-lesson-link .section-icon{flex:none;width:1.25em;height:1.25em;margin:0}
.az-lesson-title{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.az-lesson-link>span:last-child{flex:none}
#az104 .az-tabs{position:static;display:flex;flex-wrap:nowrap;overflow-x:auto;margin:18px 0}
#az104 .az-tabs button{flex:none;white-space:nowrap}
#az104 .az-lesson-panel{padding:20px;border-radius:14px;background:var(--t-panel)}
#az104 .az-lesson-panel h2{margin-top:0}
#az104 .az-lesson-panel p,#az104 .lab-steps{font-size:var(--type-body);line-height:1.75}
#az104 .source-card{margin-top:24px;padding:18px 20px}
#az104 .source-card a{overflow-wrap:anywhere}
#az104 .command-block{max-width:100%;overflow:auto}
#az104 .devops-pagination{display:flex;justify-content:space-between;gap:12px;margin-top:20px}
#az104 .devops-pagination button{font:inherit;font-size:var(--type-small)}
#az104 button:disabled{opacity:.4;cursor:default}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){#az104 .az-lesson-panel{padding:14px}.course-picker button{padding:8px 5px;font-size:.75rem}.az-lesson-link{gap:9px!important}}

/* DevOps teaching follows the same reading rhythm and inner-card width as LPIC. */
#az104 .beginner-guide{width:100%;max-width:none}
#az104 :is(.command-block,.learning-tip,.understanding-check,.devops-sources){width:100%;max-width:60rem;box-sizing:border-box}
#az104 .learning-tip,#az104 .understanding-check{padding:18px 20px;margin:20px 0;border:0;border-radius:12px;background:var(--t-raised)}
#az104 .learning-tip :is(h3,p):first-child,#az104 .understanding-check h3{margin-top:0}
#az104 .devops-unit{padding:14px 0}
#az104 .devops-unit summary{font:inherit;font-weight:600;color:var(--t-text)}
#az104 .devops-unit p{max-width:85ch}
#az104 .example-walkthrough{font-size:var(--type-body);line-height:1.75;padding-left:1.5rem}
#az104 .example-walkthrough li,#az104 .lab-steps li{margin-bottom:12px}
#az104 .devops-sources{margin-top:28px}
#az104 .devops-sources summary{font-weight:600}
#az104 .devops-sources p{font-size:var(--type-small)}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){#az104 .learning-tip,#az104 .understanding-check{padding:14px}}

.workspace-page .lesson-drawer .az-lesson-link .lesson-number{flex:none}
.course-study-progress{display:block;color:var(--t-muted);font-size:var(--type-small);margin:12px 0}
.course-practice{max-width:60rem;margin:24px 0;padding:20px;border-radius:12px;background:var(--t-raised)}
.course-practice fieldset{min-width:0;padding:16px;margin:18px 0;border:1px solid var(--t-edge);border-radius:10px}
.course-practice legend{max-width:100%;padding:0 6px;font-weight:600;overflow-wrap:anywhere}
.course-practice label{display:flex;align-items:flex-start;gap:10px;padding:10px 6px;cursor:pointer;font-size:var(--type-body);line-height:1.6}
.course-practice input[type=radio]{flex:none;width:18px;height:18px;margin:4px 0 0;accent-color:var(--t-accent)}
.course-practice-form[data-mode=command] label{display:block}
.course-practice input[type=text]{display:block;width:100%;box-sizing:border-box;margin-top:8px;font-family:ui-monospace,monospace}
.practice-result{display:block;overflow-wrap:anywhere}
.practice-score{font-weight:700}
.practice-feedback{padding:12px 14px;margin:10px 0;border-left:3px solid var(--t-muted);background:var(--t-panel);border-radius:6px}
.practice-feedback.correct{border-color:#359d7c}
.practice-feedback.review{border-color:#ce9650}
.practice-feedback p{margin:6px 0 0}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.course-practice{padding:14px}.course-practice fieldset{padding:10px}.course-practice legend{font-size:var(--type-small)}}

@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .workspace-page .app-main :is(#az104,#devops){padding:12px}
 #az104 .az-lesson-panel,#devops .devops-lesson{padding:8px 0}
 .course-practice{padding:10px}
 .workspace-page[data-theme] .app-main .course-practice fieldset{padding:10px 6px}
 .course-practice label{padding:8px 2px}
}

.lesson-exams{margin:8px 0 12px}
.lesson-exams nav{display:grid;gap:4px}
.workspace-page .lesson-drawer .lesson-exams .lesson-link{width:100%;text-align:left;font:inherit;font-size:var(--type-small);background:transparent}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){.shell-collapsed .terminal-tools>#practice-fullscreen{display:none}}

.course-exam-entry{border-top:1px solid var(--t-edge);margin-top:16px;padding-top:12px}
.workspace-page .lesson-drawer .practice-exam-link{display:flex;align-items:center;width:100%;gap:10px;text-align:left;font:inherit;font-size:var(--type-small);background:transparent;white-space:nowrap}

.mobile-lesson-tools{display:none}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .workspace-page .lesson-picker-row{display:grid;grid-template-columns:1fr auto 40px;gap:4px 8px;padding:6px 10px;align-items:center;min-height:0}
 .lesson-picker-row .header-left,.lesson-picker-row .header-right{display:contents}
 .lesson-picker-row .header-left>.menu-toggle{grid-column:1;grid-row:1;justify-self:start;min-height:38px;margin:0}
 .lesson-picker-row>.top-home-link{grid-column:2;grid-row:1;min-height:38px;margin:0}
 .lesson-picker-row .header-right>.theme-toggle{grid-column:3;grid-row:1;width:38px;height:38px;margin:0}
 .lesson-picker-row .header-left>.current-lesson{grid-column:1/-1;grid-row:2;margin:0;min-width:0}
 .workspace-page .current-lesson>span{display:none}
 .workspace-page .current-lesson h1{font-size:.78rem;line-height:1.5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:0}
 .mobile-lesson-tools{display:grid;gap:10px;margin-top:16px;padding-top:12px;border-top:1px solid var(--t-edge)}
 .mobile-lesson-tools .course-tools,.mobile-lesson-tools .reading-tools,.mobile-lesson-tools .top-stats{display:flex;flex-wrap:wrap;gap:6px;margin:0}
 .mobile-lesson-tools .course-tools button{font-size:var(--type-small);padding:8px}
 .mobile-lesson-tools .top-stats{font-size:var(--type-caption)}
}

/* Ansible follows the same lesson styles. */
.ansible-lesson-list[hidden],.ansible-lesson[hidden],[data-ansible-section][hidden]{display:none}
.ansible-lesson-list{display:grid;gap:6px}
.ansible-lesson-list .track-group>summary>span:nth-child(2){min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.ansible-lesson-list .track-group>summary :is(.expand-arrow,small){flex-shrink:0}
.ansible-lesson-link .lesson-number{flex-shrink:0}
.workspace-page .lesson-drawer .ansible-lesson-link{
 display:flex;align-items:center;gap:14px;width:100%;min-width:0;background:transparent;
 text-align:left;font-family:Inter,system-ui,sans-serif;font-size:var(--type-small);font-weight:600;line-height:1.5;
}
.ansible-lesson-link .section-icon{flex:none;width:1.25em;height:1.25em;margin:0}
.ansible-lesson-title{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ansible-lesson-link>span:last-child{flex:none}
#ansible .ansible-tabs{position:static;display:flex;flex-wrap:nowrap;overflow-x:auto;margin:18px 0}
#ansible .ansible-tabs button{flex:none;white-space:nowrap}
#ansible .ansible-lesson{padding:20px;border-radius:14px;background:var(--t-panel)}
#ansible .ansible-lesson h2{margin-top:0}
#ansible .ansible-lesson p,#ansible .lab-steps{font-size:var(--type-body);line-height:1.75}
#ansible .source-card{margin-top:24px;padding:18px 20px}
#ansible .source-card a{overflow-wrap:anywhere}
#ansible .command-block{max-width:100%;overflow:auto}
#ansible .devops-pagination{display:flex;justify-content:space-between;gap:12px;margin-top:20px}
#ansible .devops-pagination button{font:inherit;font-size:var(--type-small)}
#ansible button:disabled{opacity:.4;cursor:default}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){#ansible .ansible-lesson{padding:14px}.course-picker button{padding:8px 5px;font-size:.75rem}.ansible-lesson-link{gap:9px!important}}

/* DevOps teaching follows the same reading rhythm and inner-card width as LPIC. */
#ansible .beginner-guide{width:100%;max-width:none}
#ansible :is(.command-block,.learning-tip,.understanding-check,.devops-sources){width:100%;max-width:60rem;box-sizing:border-box}
#ansible .learning-tip,#ansible .understanding-check{padding:18px 20px;margin:20px 0;border:0;border-radius:12px;background:var(--t-raised)}
#ansible .learning-tip :is(h3,p):first-child,#ansible .understanding-check h3{margin-top:0}
#ansible .devops-unit{padding:14px 0}
#ansible .devops-unit summary{font:inherit;font-weight:600;color:var(--t-text)}
#ansible .devops-unit p{max-width:85ch}
#ansible .example-walkthrough{font-size:var(--type-body);line-height:1.75;padding-left:1.5rem}
#ansible .example-walkthrough li,#ansible .lab-steps li{margin-bottom:12px}
#ansible .devops-sources{margin-top:28px}
#ansible .devops-sources summary{font-weight:600}
#ansible .devops-sources p{font-size:var(--type-small)}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){#ansible .learning-tip,#ansible .understanding-check{padding:14px}}


@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .course-picker{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
 .workspace-page .app-main #ansible{padding:12px}
 #ansible .ansible-lesson{padding:8px 0}
}
@media(max-width:400px){
 .shell-collapsed .shell-title{white-space:nowrap;overflow:hidden}
 .shell-collapsed #terminal-status{display:none}
 .shell-collapsed .terminal-tools{flex-wrap:nowrap}
}

/* Keep command lines, indentation and aligned output intact at every width. */
.workspace-page .app-main :is(.command-block,.worked-example) pre{
 white-space:pre;overflow-wrap:normal;word-break:normal;overflow-x:auto;max-width:100%;tab-size:4;
}
.workspace-page .app-main :is(.command-block,.worked-example) pre code{white-space:inherit}
.workspace-page{height:100dvh}
.workspace-page .workspace{bottom:auto;height:calc(100dvh - var(--shell-height))}
.lesson-picker-row,.lesson-tabs{flex-shrink:0}
@media(max-width:1100px) and (max-height:500px){
 .workspace-page .lesson-picker-row{padding:4px 10px;gap:2px 8px}
 .workspace-page .lesson-tabs{margin:4px 0;padding-top:2px;padding-bottom:2px}
 .terminal-heading{flex-wrap:nowrap;gap:8px;min-height:38px}
 .terminal-heading .shell-title{width:auto;flex:none;white-space:nowrap}
 .terminal-heading #terminal-status,.terminal-heading .shell-tab{display:none}
 .terminal-tools{width:auto;min-width:0;flex:1;flex-wrap:nowrap;overflow-x:auto}
 .terminal-foot{display:none}
 .terminal-dock{grid-template-rows:5px auto minmax(0,1fr)}
 .shell-collapsed .terminal-dock,.shell-away .terminal-dock{grid-template-rows:0 1fr}
 .shell-collapsed .terminal-tools{flex:none;margin-left:auto}
}

/* One phone navigation row; expand only when the extra controls are needed. */
.phone-nav-toggle,.phone-nav-details{display:none}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .workspace-page .lesson-picker-row{grid-template-columns:1fr auto auto;grid-template-rows:auto;padding:5px 10px;gap:6px;max-height:60dvh;overflow-y:auto}
 .lesson-picker-row .phone-nav-toggle{display:inline-flex;grid-column:3;grid-row:1;min-height:38px;align-items:center;white-space:nowrap}
 .workspace-page .lesson-picker-row .current-lesson,.workspace-page .lesson-picker-row .theme-toggle{display:none}
 .workspace-page .workspace>.lesson-tabs{display:none}
 .phone-nav-open .lesson-picker-row .current-lesson{display:block;grid-column:1/3;grid-row:2}
 .phone-nav-open .lesson-picker-row .current-lesson h1{white-space:normal}
 .phone-nav-open .lesson-picker-row .header-right>.theme-toggle{display:inline-flex;grid-column:3;grid-row:2}
 .phone-nav-open .phone-nav-details{display:grid;grid-column:1/-1;grid-row:3;gap:6px}
 .workspace-page.phone-nav-open .workspace>.lesson-tabs:not([hidden]){display:flex}
 .phone-nav-details .top-stats{flex-wrap:wrap;font-size:var(--type-caption)}
 .workspace-page .phone-nav-details .course-tools{justify-content:flex-start}
}

@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .workspace-page .reading-edge{display:none}
 .workspace-page[data-theme] .app-main{padding:16px 12px;scrollbar-gutter:auto}
 .workspace-page .lesson-tabs{padding-right:8px}
 .lesson-picker-row .phone-nav-toggle{gap:6px}
 .phone-reading-percent{font-size:.68rem;font-weight:600;font-variant-numeric:tabular-nums;min-width:4ch;color:var(--t-accent)}
 .choosing-lesson .phone-reading-percent{display:none}
}
@media(max-width:400px){
 .lesson-picker-row>.top-home-link span{display:none}
 .lesson-picker-row>.top-home-link .section-icon{margin:0}
}

/* Reading percentage is separate from the phone menu button. */
.phone-reading-percent{display:none}
@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .workspace-page .lesson-picker-row{grid-template-columns:1fr auto auto auto}
 .lesson-picker-row>.phone-reading-percent{display:flex;grid-column:4;grid-row:1;align-items:center;justify-content:center;min-width:42px;min-height:38px;padding:0 6px;border:1px solid var(--t-edge);border-radius:8px;background:var(--t-panel);box-sizing:border-box}
 .choosing-lesson .lesson-picker-row>.phone-reading-percent{display:none}
 .phone-nav-open .phone-nav-details{grid-column:1/-1}
}

/* A quiet progress line overlays the edge only while the phone page scrolls. */
@media(max-width:760px), (max-width:1100px) and (max-height:500px){
 .workspace-page .reading-edge{display:block;width:2px;background:transparent;opacity:0;transition:opacity .35s ease;pointer-events:none}
 .workspace-page .reading-edge>span{background:var(--t-muted);border-radius:2px;opacity:.45}
 .workspace-page .reading-edge-percent{display:none}
 .workspace-page.reading-scrolling .reading-edge{opacity:1}
 .workspace-page.choosing-lesson .reading-edge{display:none}
}
@media(prefers-reduced-motion:reduce){.workspace-page .reading-edge{transition:none}}