/* Machine Room curriculum skin. Load after styles.css and academy.css. */
:root{
  color-scheme:dark;
  --paper:#0d151d;--surface:#16222c;--rail:#101b24;--ink:#e8eff3;
  --muted:#a4b4bf;--line:#334754;--accent:#ff824b;--accent-soft:#33261f;
  --green:#a9d9e8;--green-soft:#172d38;--blue:#a9d9e8;--yellow:#ddad61;
  --danger:#ffac8c;--sans:Bahnschrift,"Segoe UI",Arial,sans-serif;
  --mono:"Courier New",Courier,monospace;--mr-soft:#243540;--mr-dim:#acbdc9;
}
html{scroll-padding-top:105px}body{background:var(--paper);color:var(--ink);font:18px/1.65 var(--sans)}
::selection{background:var(--accent);color:#101820}a{text-underline-offset:4px}
button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
button:disabled{opacity:.55}button,input,select,textarea{border-radius:0!important}
.masthead{height:94px;background:#0d151df7;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:15;padding:0 32px;gap:24px;backdrop-filter:blur(12px)}
.brand{font:600 25px/1 var(--sans);letter-spacing:1px;gap:13px;color:var(--ink)}
.brand-light{font-weight:300;color:var(--green)}.brand small{font:14px/1.55 var(--mono);letter-spacing:.04em;color:var(--mr-dim);margin-top:9px}
.brand-mark{font:400 49px/.8 var(--sans);color:var(--accent);transform:none;margin-right:1px}
.mast-right{gap:26px}.top-link{font:16px/1.55 var(--mono);letter-spacing:.025em;color:var(--muted);padding:10px 0;border-bottom:1px solid transparent}
.top-link:hover,.top-link[aria-current=page]{color:var(--ice,var(--green));border-bottom-color:var(--accent)}
.academy-layout{grid-template-columns:320px minmax(0,1fr);align-items:start;min-height:calc(100vh - 94px)}
.academy-layout .sidebar{position:sticky;top:94px;height:calc(100vh - 94px);max-height:calc(100vh - 94px);overflow:auto;scrollbar-width:thin;scrollbar-color:#456171 #101b24;background:var(--rail);border-right:1px solid var(--line);padding:25px 16px 30px;display:flex}
.sidebar-heading{color:var(--mr-dim);font:14px/1.55 var(--mono);letter-spacing:.04em;margin:0 7px 22px;gap:10px}
.sidebar-heading a{color:var(--green)}.sidebar-heading span:last-child{color:var(--accent);font-size:14px;white-space:nowrap}
.search-label{font:16px/1.55 var(--mono);color:var(--muted);margin:0 7px 9px}
.sidebar input[type=search]{background:#0e1820;color:var(--ink);border:1px solid #3b5262;padding:11px 10px;font:16px/1.55 var(--sans);min-height:41px}
.sidebar input::placeholder{color:#a7bbc8;opacity:1}
.course-progress{font:14px/1.75 var(--mono);color:var(--muted);margin:21px 7px 17px}
.course-progress .track{background:#2a3b48;height:4px;margin:10px 0 8px}.course-progress .track span{background:var(--accent);height:100%}
.course-progress a{color:var(--green)}.course-group{margin:0;border-top:1px solid #263946}
.course-group summary{font:400 16px/1.55 var(--sans);gap:9px;padding:13px 5px;color:#d1dde4;list-style:none}
.course-group summary::-webkit-details-marker{display:none}.course-group summary:hover{background:#192b36;color:white}
.course-group summary::before{font:16px/1.55 var(--mono);color:var(--accent);min-width:10px}.course-group summary .module-index{color:var(--mr-dim);font:14px/1.55 var(--mono)}
.course-group[open] summary{color:var(--green)}.course-group[open] summary .module-index{color:var(--accent)}
.course-lesson-link{font:16px/1.7 var(--sans);color:#aebfca;gap:7px;margin:0;padding:10px 10px 10px 21px;border-left:1px solid #354b5b;border-bottom:1px solid #1e303b}
.course-lesson-link:hover{background:#1a2d39;color:#eef7fb}.course-lesson-link.active{background:#213541;color:var(--green);border-left:3px solid var(--accent);padding-left:19px}
.course-lesson-link .lesson-mark{color:var(--accent);font:14px/1.75 var(--mono)}
.sidebar-foot{border-color:var(--line);padding:19px 7px 0;margin-top:25px}.sidebar-foot>a{font:16px/1.7 var(--mono);color:var(--mr-dim);margin:12px 0;text-decoration-color:#476170}
.sidebar-foot>a:hover{color:var(--green)}.no-results{color:var(--muted);font:16px/1.7 var(--sans)}
.academy-layout main{padding:30px 42px 0;max-width:1560px;width:100%;margin:0 auto;min-width:0}
h1,.academy-hero h1,.lesson-intro h1{font-family:var(--sans);font-weight:400;letter-spacing:-.035em;line-height:1.09;color:var(--ink)}
.academy-hero h1{font-size:clamp(39px,4.5vw,65px);max-width:850px;margin-bottom:19px}.academy-hero{padding:15px 0 29px;border-bottom:1px solid #526777;margin-bottom:24px}
.academy-hero p{font:400 18px/1.75 var(--sans);color:var(--muted);max-width:760px;margin:0}
.academy-meta{color:var(--mr-dim);font:14px/1.6 var(--mono);letter-spacing:.065em;gap:12px 25px;margin-bottom:19px}
.academy-meta>span:first-child{color:var(--accent)}.eyebrow{color:var(--accent);font:14px/1.6 var(--mono);letter-spacing:.08em}
.btn{border:1px solid #425b6a;color:var(--green);background:#14222c;border-radius:0;padding:10px 14px;font:16px/1.55 var(--mono);min-height:40px;letter-spacing:.015em;box-shadow:none}
.btn:hover{background:#233b49;border-color:#6a8c9e;color:#edf7fc}.btn-primary{background:var(--accent);border-color:var(--accent);color:#15212b;font-weight:bold}
.btn-primary:hover{background:#ff9b70;border-color:#ff9b70;color:#111b23}.hero-actions{gap:9px;margin-top:24px}
.course-stats{gap:0;border:1px solid var(--line);margin:25px 0 0;background:#121e27}
.course-stats>div{flex:1;min-width:140px;padding:19px 22px;border-right:1px solid var(--line)}.course-stats>div:last-child{border:0}
.course-stats strong{font:30px/1.1 var(--mono);color:var(--green);letter-spacing:-1px}.course-stats span{font:14px/1.6 var(--mono);display:block;margin-top:9px;color:var(--mr-dim)}
.section-intro{margin:35px 0 20px;align-items:end}.section-intro h2{font:400 29px/1.2 var(--sans);letter-spacing:-.025em;color:var(--ink)}.section-intro p{font:18px/1.7 var(--sans);color:var(--muted)}
.module-list{border-top:1px solid #647d8d}.module-row{grid-template-columns:45px minmax(0,1fr) 118px;gap:20px;padding:23px 11px;border-bottom:1px solid var(--line);transition:background .15s}
.module-row:hover{background:#14242e}.module-row .number{font:18px/1.55 var(--mono);color:var(--accent);padding-top:1px}
.module-row h3{font:400 19px/1.55 var(--sans);letter-spacing:-.015em;margin:0 0 8px}.module-row h3 a{color:var(--green)}.module-row h3 a:hover{text-decoration:underline}
.module-row p{font:18px/1.75 var(--sans);color:var(--muted);max-width:780px}.module-row .module-meta{font:14px/1.75 var(--mono);color:var(--mr-dim)}
.path-grid{display:block;border-top:1px solid var(--line)}.path-card{display:grid;grid-template-columns:150px minmax(0,1fr) auto;gap:9px 25px;padding:23px 8px;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent;align-items:start}
.path-card .path-tag{grid-row:1/3;font:14px/1.6 var(--mono);color:var(--accent);padding-top:5px}.path-card h3{font:400 22px/1.55 var(--sans);color:var(--green);margin:0}.path-card p{grid-column:2;margin:0;font:18px/1.7 var(--sans)}.path-card .btn{grid-column:3;grid-row:1/3;align-self:center}
.readable{max-width:1050px}.breadcrumbs{font:14px/1.7 var(--mono);letter-spacing:.025em;color:var(--mr-dim);margin-bottom:21px}.breadcrumbs a{color:var(--green)}
.lesson-intro{padding:11px 0 27px;border-bottom:1px solid #5a7283;margin:0 0 0}
.lesson-intro h1{font-size:clamp(35px,4vw,57px);max-width:990px;margin:12px 0 20px}
.lesson-intro .academy-meta{align-items:center;justify-content:flex-start;margin:0;gap:12px 22px}.lesson-intro .academy-meta .btn{margin-left:auto;min-height:35px;padding:7px 11px;font-size:16px}
.lesson-objectives{margin:27px 0 31px;background:#142733;border:1px solid #385766;border-left:3px solid var(--green);padding:20px 25px;max-width:890px}
.lesson-objectives h2{font:14px/1.55 var(--mono);font-weight:normal;letter-spacing:.09em;color:var(--green);margin:0 0 12px}.lesson-objectives ul{font:18px/1.75 var(--sans);color:#c2d1d9;padding-left:19px}.lesson-objectives li::marker{color:var(--accent)}
.lesson-body{max-width:790px;font:18px/1.75 Arial,sans-serif;color:#b7c7d1;margin:0 0 35px}.lesson-body p{margin:0 0 22px}
.lesson-body strong{color:#eff6fa}.lesson-section{max-width:900px;margin:32px 0}.lesson-body h2,.lesson-section h2{font:400 27px/1.25 var(--sans);letter-spacing:-.02em;color:var(--ink);margin:34px 0 19px}
.lesson-section h2::before{content:"/ ";font-family:var(--mono);color:var(--accent);font-weight:normal}
.lesson-steps{list-style:none;counter-reset:lesson-step;padding:0;margin:0;border-top:1px solid var(--line)}
.lesson-steps li{position:relative;counter-increment:lesson-step;padding:17px 16px 17px 54px;border-bottom:1px solid var(--line);margin:0;font:18px/1.75 var(--sans);color:#bdcdd6}
.lesson-steps li::before{content:counter(lesson-step,decimal-leading-zero);position:absolute;left:11px;top:20px;font:16px/1.55 var(--mono);color:var(--accent)}
.lesson-tools{gap:8px;margin:17px 0 30px}.lesson-tools .btn{background:transparent;color:var(--mr-dim);border:0;border-bottom:1px solid #405d6e;padding:7px 2px;min-height:32px;margin-right:10px;font-size:16px}.lesson-tools .btn:hover{color:var(--green);border-color:var(--accent)}
.exercise-box{background:#162630;border:1px solid #426073;border-left:3px solid var(--accent);padding:26px 27px;border-radius:0;max-width:900px;margin:35px 0}
.exercise-box h2{font:400 29px/1.2 var(--sans);letter-spacing:-.025em;color:var(--ink);margin:0 0 15px}.exercise-box h3{font:14px/1.55 var(--mono);letter-spacing:.055em;text-transform:uppercase;color:var(--green);margin:24px 0 12px}
.exercise-box p,.exercise-box li{font:18px/1.75 var(--sans);color:#b7c9d3}.exercise-box ul{padding-left:21px}.exercise-box li::marker{color:var(--accent)}
.self-check-note{font:16px/1.75 var(--sans);color:var(--mr-dim)}.exercise-box .self-check-note{font-size:16px;color:var(--mr-dim)}
.self-check-list{list-style:none!important;padding:0!important;margin-top:15px}.self-check-list li{margin:0;border-top:1px solid #354e5e}
.self-check-list label{margin:0;padding:13px 0;gap:14px;font:18px/1.75 var(--sans);cursor:pointer;color:#cfdae1}
.self-check-list input{accent-color:var(--accent);width:17px;height:17px;min-width:17px;margin-top:4px;border-radius:0}
.self-check-list label:has(input:checked){color:var(--green)}.exercise-box>.btn{margin-top:13px}
.repair-case{border-bottom:1px solid var(--line);padding:20px 0}.repair-case h3{font:400 18px/1.55 var(--sans);color:var(--green);margin-bottom:11px}.repair-case p{font:18px/1.75 var(--sans);color:var(--muted);margin:8px 0}.repair-case strong{color:#e3ecf1;font-weight:500}
.quiz{max-width:900px}.quiz fieldset{padding:23px 24px;background:#121f29;border:1px solid #405868;border-radius:0;margin:22px 0;min-width:0}.quiz legend{font:500 18px/1.75 var(--sans);color:var(--ink);padding:0 10px;max-width:100%}
.quiz label{position:relative;margin:0;padding:13px 9px;gap:13px;font:18px/1.75 var(--sans);color:#beced7;border-bottom:1px solid #293e4c;cursor:pointer;align-items:flex-start}
.quiz label:hover{background:#1b303e}.quiz label:has(input:checked){background:#203846;color:var(--green)}.quiz input[type=radio]{accent-color:var(--accent);width:16px;height:16px;min-width:16px;margin-top:4px}
.quiz-feedback{border:1px solid #355c6b;border-left:3px solid var(--green);background:#19303b;border-radius:0;padding:15px 17px;font:18px/1.75 var(--sans);color:#c3d9e3;margin-top:19px}
.quiz-feedback strong{color:#c9eff7}.quiz-feedback.wrong{background:#302820;border-color:#6f4d36;border-left-color:var(--accent);color:#e4caba}.quiz-feedback.wrong strong{color:#ffba95}
.quiz-summary{font:16px/1.75 var(--mono);color:var(--green);margin:16px 0}.notebook label{display:block;max-width:730px;margin-bottom:12px}
.notebook textarea{padding:17px 19px;min-height:165px;color:#d5e5ed;background:#101d26;border:1px solid #405d6e;border-top:2px solid var(--accent);font:18px/1.75 var(--mono);border-radius:0}
.notebook textarea::placeholder{color:#a6bdca;opacity:1}.completion-row{gap:17px;margin:35px 0 0;padding:24px 0;border-top:1px solid #587080;max-width:900px}
.completion-row p{font:18px/1.75 var(--sans);color:var(--mr-dim);max-width:510px}.lesson-nav{border-top:1px solid var(--line);padding:24px 0 8px;margin-top:33px;max-width:1000px}
.lesson-nav a{font:18px/1.6 var(--sans);color:var(--green);max-width:46%;text-decoration:none}.lesson-nav a:hover{color:#e5f5fd}.lesson-nav small{font:14px/1.7 var(--mono);color:var(--accent);margin-bottom:8px}
.source-list{font:18px/1.75 var(--sans);padding-left:19px;overflow-wrap:anywhere}.source-list a{color:#9bd0e0;text-decoration-color:#476a7b}.source-list a:hover{color:#d5eff8}.source-list li::marker{color:var(--accent)}
.unit-chip{border:1px solid #3e5a6b;color:var(--green);font:14px/1.55 var(--mono);border-radius:0;background:transparent;letter-spacing:.04em}
.download-grid{display:block;border-top:1px solid #526c7d}.download-card{display:grid;grid-template-columns:300px minmax(0,1fr);gap:12px 32px;border:0;border-bottom:1px solid var(--line);padding:25px 6px;background:transparent;border-radius:0;align-items:start}
.download-card>.unit-chip{justify-self:start;grid-column:1}.download-card h3{font:400 22px/1.55 var(--sans);letter-spacing:-.02em;color:var(--green);grid-column:1;margin:0}
.download-card>p:not(.status-note){grid-column:2;grid-row:1/3;font:18px/1.75 var(--sans);color:var(--muted);margin:0}.download-links{grid-column:1;gap:7px;margin:3px 0 0}.download-links a{font-size:16px;padding:7px 10px;min-height:34px}
.download-card .status-note{grid-column:2;grid-row:3/5;font:16px/1.75 var(--mono)!important;color:#a9bdc9!important;border-left:2px solid var(--accent);padding:0 0 0 15px;margin:0}
.worksheet-list{display:block;border-top:1px solid var(--line)}.worksheet-link{display:grid;grid-template-columns:245px minmax(0,1fr);gap:20px;padding:17px 6px;border-bottom:1px solid var(--line);font:18px/1.75 var(--sans);color:var(--green)}.worksheet-link:hover{background:#14252f}.worksheet-link span{font:16px/1.75 var(--sans);color:var(--muted);margin:0}
.glossary{margin:15px 0 37px;display:grid;grid-template-columns:205px minmax(0,1fr);column-gap:30px;border-top:1px solid var(--line)}.glossary dt{font:400 18px/1.55 var(--sans);color:var(--green);margin:0;padding:21px 0;border-bottom:1px solid var(--line)}.glossary dd{font:18px/1.75 var(--sans);color:var(--muted);margin:0;padding:19px 0;border-bottom:1px solid var(--line)}
.studio-select{background:#11222d;color:var(--green);border:1px solid #456273;padding:12px;font:18px/1.55 var(--sans);max-width:730px;border-radius:0;margin:13px 0 24px}
.studio-card{background:#13232e;border:1px solid #385364;border-left:2px solid var(--accent);padding:25px 27px;border-radius:0;margin:0 0 22px;max-width:1000px}.studio-card h3{font:400 26px/1.25 var(--sans);color:var(--ink);letter-spacing:-.025em;margin:14px 0}.studio-card>p a{font:16px/1.55 var(--mono);color:var(--green)}
.studio-card ol{padding-left:24px;margin:20px 0 24px}.studio-card li{font:18px/1.75 var(--sans);color:#bdced8;margin:9px 0}.studio-card li::marker{font-family:var(--mono);color:var(--accent)}
.inline-check{font:16px/1.75 var(--sans);color:var(--muted);align-items:flex-start;gap:12px}.inline-check input{margin-top:4px;accent-color:var(--accent);width:16px;height:16px;min-width:16px}
.studio-card input[type=url]{color:var(--green);background:#0d1922;border:1px solid #3e5d70;padding:12px;font:16px/1.6 var(--mono);margin:10px 0}.studio-card input::placeholder{color:#a6bdca}.studio-card label.note{display:block;margin-top:24px}.studio-card .note{font-size:16px;max-width:850px;line-height:1.75}
.video-companion{border:1px solid #3c5c6d;border-top:2px solid var(--accent);background:#142731;padding:20px 22px;margin:28px 0;max-width:900px}.video-companion h2{font:400 23px/1.3 var(--sans);margin:0 0 17px;color:var(--green)}.video-companion a{color:var(--green)}
.progress-card{padding:22px 4px;border-bottom:1px solid var(--line);max-width:1000px;font:16px/1.75 var(--sans)}.progress-card strong{font:400 19px/1.55 var(--sans);color:var(--green);margin-bottom:10px}.progress-card strong a{text-decoration:none}.progress-card>span{font:14px/1.75 var(--mono);color:var(--accent)}.progress-card p{font:18px/1.75 var(--mono);color:var(--muted);margin:15px 0 0;white-space:pre-wrap;overflow-wrap:anywhere}
.empty-state{padding:35px 0;font:18px/1.75 var(--sans);color:var(--mr-dim);border-top:1px solid var(--line)}
.note{font:16px/1.75 var(--sans);color:var(--muted);max-width:1000px}.note strong{color:var(--green);font-weight:500}.note a{color:var(--green)}code{font-family:var(--mono);color:#b3deeb;font-size:.9em;overflow-wrap:anywhere}
.site-foot{border-color:var(--line);font:14px/1.75 var(--mono);letter-spacing:.025em;color:var(--mr-dim);padding:24px 0 27px;gap:25px;margin-top:40px}
#course-toast{background:#263d4b;color:#e8f4fa;border:1px solid #658496;border-left:3px solid var(--accent);border-radius:0;font:16px/1.7 var(--sans);max-width:calc(100vw - 32px);text-align:center;padding:12px 20px;z-index:30}
/* Lesson console: local reading controls and an instrument opened on demand. */
.lc-console{position:sticky;top:var(--lc-header-height,94px);z-index:9;background:#101e28f8;border:1px solid #3a5567;border-top:2px solid var(--accent);margin:0 0 27px;backdrop-filter:blur(10px)}
.lc-metrics{display:flex;align-items:stretch;border-bottom:1px solid var(--line);min-height:63px}.lc-label{font:14px/1.55 var(--mono);color:var(--mr-dim);letter-spacing:.07em;display:block}
.lc-reading{padding:12px 17px 10px;width:34%;min-width:170px;position:relative;border-right:1px solid var(--line);display:grid;grid-template-columns:1fr auto;align-items:baseline;gap:7px 10px}.lc-reading-value{font:18px/1.55 var(--mono);color:var(--green);font-weight:normal;letter-spacing:-.04em}
.lc-reading-track{height:3px;background:#2f4757;grid-column:1/-1;align-self:end;margin-top:3px;overflow:hidden}.lc-reading-track span{display:block;width:0;height:100%;background:var(--accent)}
.lc-metric{padding:11px 17px;min-width:122px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:6px;justify-content:center}.lc-metric strong{font:18px/1.55 var(--mono);color:var(--green);font-weight:normal}
.lc-record{margin-left:auto;display:flex;gap:8px;align-items:center;padding:11px 17px;font:14px/1.6 var(--mono);letter-spacing:.015em;color:var(--mr-dim)}.lc-indicator{width:5px;height:5px;background:#718b9a;flex-shrink:0}.lc-record-complete{color:var(--green)}.lc-record-complete .lc-indicator{background:var(--accent)}
.lc-jumps{display:flex;align-items:stretch;overflow:auto;scrollbar-width:thin;scrollbar-color:#3b5667 #14232d;gap:0;padding:0 8px}
.lc-jump{flex:0 0 auto;background:none;border:0;border-bottom:2px solid transparent;color:var(--muted);padding:11px 13px 10px;font:16px/1.55 var(--mono);min-height:38px;text-align:center;white-space:nowrap;transition:background .15s,color .15s}
.lc-jump:hover{background:#223946;color:#e2f2fa}.lc-jump.lc-active{color:var(--accent);border-bottom-color:var(--accent);background:#21313b}.lc-jump-target{scroll-margin-top:var(--lc-jump-offset,205px)}
.lc-jump-target:focus-visible{outline:1px solid var(--accent);outline-offset:7px}
.lc-workbench{border:1px solid #476577;border-top:2px solid var(--green);padding:24px 25px 17px;margin:35px 0 14px;background:#132630;max-width:100%;min-width:0}
.lc-lab-heading{display:flex;justify-content:space-between;align-items:start;gap:22px}.lc-lab-heading .lc-label{color:var(--green);font-size:14px}.lc-lab-heading h2{font:400 26px/1.25 var(--sans);letter-spacing:-.025em;margin:10px 0 0;color:#e0edf3}.lc-lab-tag{font:14px/1.75 var(--mono);color:var(--accent);letter-spacing:.035em;white-space:nowrap;border:1px solid #6d5140;padding:2px 7px}
.lc-lab-description{font:18px/1.75 var(--sans);color:var(--muted);max-width:720px;margin:16px 0 20px}.lc-lab-actions{display:flex;align-items:end;flex-wrap:wrap;gap:14px 20px}
.lc-lab-toggle{min-height:40px;padding:10px 14px;border:1px solid var(--accent);background:var(--accent);color:#12212b;font:bold 16px/1.55 var(--mono);letter-spacing:.005em}
.lc-lab-toggle:hover{background:#ffa175;border-color:#ffa175}.lc-lab-open .lc-lab-toggle{background:#203541;border-color:#7594a5;color:var(--green)}
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.lc-tool-frame{display:block;width:100%;height:850px;min-height:560px;border:0;background:#0d151d;color-scheme:dark}
@media(min-width:1700px){.academy-layout main{padding-left:56px;padding-right:56px}.readable{max-width:1100px}.lesson-body{max-width:820px}}
@media(max-width:1200px){.academy-layout{grid-template-columns:300px minmax(0,1fr)}.academy-layout main{padding-left:29px;padding-right:29px}.academy-layout .sidebar{padding:23px 12px}.lc-metric{min-width:97px;padding:11px 13px}.lc-reading{min-width:155px;padding-left:13px;padding-right:13px}.lc-record{padding-left:11px;padding-right:11px;font-size:14px;max-width:145px}.lc-jump{padding-left:10px;padding-right:10px}.download-card{grid-template-columns:205px minmax(0,1fr);column-gap:24px}.module-row{grid-template-columns:32px minmax(0,1fr) 100px;gap:15px}.lc-lab-tag{display:none}.lc-full-tool{margin-left:0}.path-card{grid-template-columns:120px minmax(0,1fr);gap:10px 20px}.path-card .btn{grid-column:2;grid-row:auto;justify-self:start}.path-card p{grid-column:2}.path-card .path-tag{grid-row:1/4}.worksheet-link{grid-template-columns:205px minmax(0,1fr)}.glossary{grid-template-columns:170px minmax(0,1fr);column-gap:23px}}
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@media(max-width:700px){.masthead{height:auto;min-height:128px;padding:15px 18px 10px;gap:12px;flex-wrap:wrap}.brand{font-size:22px;gap:9px}.brand small{font-size:14px;letter-spacing:.6px}.brand-mark{font-size:43px}.mast-right{gap:14px}.top-link{font-size:16px;min-height:38px;display:inline-flex;align-items:center}.masthead .mobile-nav{display:inline-flex;font-size:16px;min-height:36px;padding:7px 11px;background:#1a303e;border-color:#4a6a7c;color:var(--green)}.academy-layout{display:block;min-height:calc(100vh - 128px)}.academy-layout .sidebar{display:none;position:fixed;top:var(--lc-header-height,128px);left:0;right:0;bottom:0;z-index:14;height:calc(100dvh - var(--lc-header-height,128px));max-height:calc(100dvh - var(--lc-header-height,128px));border-right:0;padding:25px 22px}.academy-layout .sidebar.open{display:flex}.academy-layout .sidebar-foot{display:block}.sidebar-heading{font-size:14px}.course-group 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@media(max-width:400px){.masthead{padding:14px 15px 10px;gap:12px}.brand{font-size:20px}.brand small{font-size:14px}.brand-mark{font-size:39px}.mast-right{gap:10px}.mast-right .top-link:first-child{display:none}.top-link{font-size:16px}.academy-layout main{padding-left:15px;padding-right:15px}.lesson-intro h1{font-size:33px}.academy-hero h1{font-size:38px}.lc-metric{min-width:76px;padding-left:10px;padding-right:10px}.lc-reading{padding-left:10px;padding-right:10px}.lc-reading-value{font-size:18px}.lc-console .lc-label{font-size:14px}.lc-jump{font-size:16px;padding-left:12px;padding-right:12px}.exercise-box{padding:21px 15px}.quiz fieldset{padding:18px 10px}.hero-actions .btn{font-size:16px}.lc-lab-heading h2{font-size:23px}}
@media(max-width:700px){.lc-console .lc-label{font-size:14px;letter-spacing:0}.lc-reading{min-width:138px}.masthead .command-trigger{min-height:36px;padding:7px 11px}}
@media(max-width:550px){.masthead .mast-right .top-link{display:none}.masthead .mast-right{margin-left:auto;gap:11px}.masthead .command-trigger kbd{display:none}.lc-reading{min-width:0}.lc-console .lc-label{font-size:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
/* Reading scale: 18 px prose, 16 px controls, 14 px supporting metadata. */
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@media(max-width:700px){.masthead .mast-right{width:100%;margin-left:0;justify-content:space-between;gap:12px;flex-wrap:wrap}.masthead .command-trigger,.masthead .mobile-nav{font-size:16px;min-height:44px;padding:10px 13px}.lc-reading{flex-basis:100%;border-right:0;border-bottom:1px solid var(--line)}.lc-metric{flex-basis:45%}.lc-console .lc-label{font-size:14px}.lc-record{display:none}.module-row .module-meta{font-size:14px}.lesson-nav a{flex:1 1 180px;max-width:100%}.section-intro{align-items:flex-start;flex-wrap:wrap}.lesson-steps li{padding-left:48px}.lesson-steps li::before{font-size:16px;top:18px}.course-group summary,.course-lesson-link{font-size:16px}}
@media(max-width:600px){.masthead{min-height:112px}.brand small{display:none}.lc-lab-heading{flex-wrap:wrap}.lc-lab-actions>*{max-width:100%}.academy-layout .sidebar{top:var(--lc-header-height,112px);height:calc(100dvh - var(--lc-header-height,112px));max-height:calc(100dvh - var(--lc-header-height,112px))}}
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  :root{color-scheme:light;--paper:white;--surface:white;--ink:#111;--muted:#333;--green:#111;--accent:#111;--line:#bbb;--mr-dim:#333}
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  .masthead,.academy-layout .sidebar,.lc-console,.lc-workbench,.lesson-tools,.lesson-nav,.hero-actions,.completion-row,.site-foot,#course-toast,.video-companion{display:none!important}
  .academy-layout{display:block!important}.academy-layout main{padding:0!important;margin:0!important;max-width:none!important}.readable{max-width:none!important}
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  .notebook textarea{border:1px solid #aaa!important;min-height:120px}.quiz label{border-color:#ddd}.quiz-feedback{font-size:10pt}.lesson-intro .btn,.quiz button{display:none!important}a{color:#111!important;text-decoration:underline}
}