/* Learning studio: the Atlas's paper, ink, and diagrams become a place to work. */
:root{--academy-green:#185b50;--academy-light:#e6eee5;--academy-orange:#a8472d;--academy-border:#cbd7ca}
.learning-kicker,.lesson-section-label,.course-position{display:block;font:10px/1.6 var(--mono);text-transform:uppercase;letter-spacing:1.2px;color:var(--teal)}
.record-learning{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:0 0 34px;padding:23px 27px;border:1px solid var(--academy-border);border-left:4px solid var(--teal);background:var(--academy-light)}
.record-learning h2{font:28px/1.2 var(--serif);margin:6px 0}.record-learning p{font-size:13px;max-width:680px;color:#4c5e50}.record-learning .button{flex-shrink:0}
.academy-hero{display:grid;grid-template-columns:1fr 1.04fr;gap:clamp(32px,5vw,80px);align-items:center;padding:60px 0 44px}.academy-hero-copy>h1{font:clamp(59px,6vw,96px)/1.02 var(--serif);letter-spacing:-2px;margin:22px 0}.academy-hero-copy>h1 em{font-style:normal;color:var(--teal)}.academy-hero-copy>p{max-width:490px;color:var(--muted);font-size:17px;line-height:1.85}.academy-hero .button{background:var(--academy-green);border-color:var(--academy-green)}
.academy-hero-lab{border:1px solid var(--academy-border);background:var(--white);box-shadow:8px 8px 0 #e5e8dd;padding:25px 27px}.academy-lab-intro h2{font:35px/1.15 var(--serif);margin:8px 0 9px}.academy-lab-intro>p{font-size:13px;color:var(--muted)}.hero-lab-link{display:flex;justify-content:space-between;gap:20px;font-size:12px;font-weight:600;border-top:1px solid var(--line);padding-top:16px;margin-top:18px;color:var(--teal)}
.academy-resume{font-size:12px;line-height:1.8;color:var(--muted);margin-top:27px;max-width:500px}.academy-resume a{color:var(--teal);text-decoration:underline;text-underline-offset:3px}.academy-resume h2,.academy-resume h3{font:25px/1.3 var(--serif);color:var(--ink);margin-bottom:6px}.academy-resume .button{margin-top:10px;text-decoration:none;color:var(--white)}.academy-resume-wide{max-width:none;margin:0 0 35px;padding:24px 28px;background:var(--academy-light);border-left:3px solid var(--teal);font-size:14px}
.academy-facts{display:grid;grid-template-columns:repeat(4,1fr);border-block:1px solid var(--line);padding:19px 0;gap:20px}.academy-facts>span{display:flex;align-items:center;gap:13px;font-size:12px;color:var(--muted)}.academy-facts strong{font:32px/1.2 var(--serif);color:var(--ink)}
.academy-section{margin:66px 0}.academy-section-head{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:end;margin-bottom:29px}.academy-section-head h2,.academy-practice-feature h2,.academy-archive h2{font:clamp(35px,3.3vw,49px)/1.1 var(--serif);letter-spacing:-.7px;margin-top:12px}.academy-section-head>p{max-width:510px;font-size:14px;color:var(--muted);line-height:1.85}
.academy-courses{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--ink);column-gap:44px}.academy-course{display:flex;gap:22px;padding:30px 0;border-bottom:1px solid var(--line)}.academy-course:last-child:nth-child(odd){grid-column:1/-1}.course-index{font:15px/1.5 var(--mono);color:var(--copper);padding-top:1px;min-width:24px}.course-main{min-width:0;flex:1}.course-meta{display:flex;gap:9px;flex-wrap:wrap;font:10px/1.6 var(--mono);color:var(--muted);margin-bottom:10px}.academy-course h2,.academy-course h3{font:31px/1.18 var(--serif);margin-bottom:12px}.academy-course h2 a:hover,.academy-course h3 a:hover{color:var(--teal)}.academy-course p{font-size:13px;line-height:1.85;max-width:700px;color:var(--muted)}.course-start{display:inline-flex;gap:32px;align-items:center;color:var(--teal);font-size:12px;font-weight:600;margin-top:17px}.course-start:hover{text-decoration:underline;text-underline-offset:4px}.course-progress{font:11px/1.7 var(--sans);color:var(--muted);margin-top:14px}.course-progress progress{width:100%;height:6px;display:block;margin-top:7px;accent-color:var(--teal);border:0;background:#dde3d8}.course-progress progress::-webkit-progress-bar{background:#dde3d8;border-radius:5px}.course-progress progress::-webkit-progress-value{background:var(--teal);border-radius:5px}.course-progress progress::-moz-progress-bar{background:var(--teal)}
.academy-practice-feature{display:grid;grid-template-columns:1fr 1fr;gap:70px;padding:43px;background:var(--academy-green);color:#fffdf8}.academy-practice-feature .eyebrow{color:#d8e4d7}.academy-practice-feature .eyebrow:before{background:#d8b36e}.academy-practice-feature p{font-size:14px;line-height:1.9;color:#dbe7da;margin-top:19px;max-width:480px}.academy-practice-feature .button{background:#f6f3ec;color:var(--academy-green);border-color:#f6f3ec}.academy-practice-feature .text-link{border-color:#a7c6b7}.academy-method{list-style:none;padding:0;margin:0}.academy-method li{display:flex;gap:21px;padding:20px 0;border-bottom:1px solid #67958a}.academy-method li:first-child{padding-top:0}.academy-method li:last-child{border:0;padding-bottom:0}.academy-method li>span{font:12px/1.6 var(--mono);color:#d8b36e;padding-top:6px}.academy-method h3{font:28px/1.2 var(--serif)}.academy-method p{font-size:12px;margin-top:9px}
.academy-archive{display:grid;grid-template-columns:1.1fr 1fr;gap:80px;align-items:start;margin:75px 0 35px}.academy-archive p{font-size:14px;line-height:1.85;color:var(--muted);margin:20px 0}.academy-archive nav{border-top:1px solid var(--ink)}.academy-archive nav a{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-bottom:1px solid var(--line);font:25px/1.3 var(--serif)}.academy-archive nav a:hover{color:var(--teal)}.academy-archive nav a>span{display:flex;align-items:center;gap:22px;font:12px/1.5 var(--mono);color:var(--muted)}
.academy-storage{font-size:11px;line-height:1.8;color:var(--muted);margin:28px 0;max-width:800px}.academy-storage a{text-decoration:underline;text-underline-offset:3px}.academy-storage[data-state="temporary"],.academy-storage[data-state="error"]{color:#8b3b24;background:#f3e7dc;padding:14px}.academy-course-catalog{border-top:1px solid var(--ink)}.academy-course-catalog .academy-course{padding:36px 0;gap:32px}.academy-course-catalog .course-main{display:grid;grid-template-columns:1fr 1fr;column-gap:70px}.academy-course-catalog .course-main>.course-meta,.academy-course-catalog h2,.academy-course-catalog p,.academy-course-catalog .course-progress,.academy-course-catalog .course-start{grid-column:1}.academy-course-catalog .course-lesson-preview{grid-column:2;grid-row:1/6;margin:0;padding-left:23px;align-self:center;font-size:13px;line-height:1.7}.course-lesson-preview li{padding:7px 0 7px 4px}.course-lesson-preview a:hover{text-decoration:underline;text-underline-offset:3px;color:var(--teal)}.academy-crosslinks{display:flex;gap:30px;flex-wrap:wrap;padding:24px 0;font-size:13px;color:var(--teal)}
.academy-course-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:65px}.academy-objective{padding:25px 28px;background:var(--academy-light);margin-bottom:25px}.academy-objective p{font:25px/1.4 var(--serif);margin-top:9px}.academy-small-heading{font:31px/1.2 var(--serif);margin:31px 0 18px}.academy-lesson-list{margin:0;padding:0;list-style:none;border-top:1px solid var(--ink)}.academy-lesson-list>li>a{display:flex;align-items:flex-start;gap:22px;padding:25px 0;border-bottom:1px solid var(--line);min-width:0}.lesson-number{font:12px/1.6 var(--mono);color:var(--teal);min-width:22px;padding-top:6px}.academy-lesson-list strong{font:27px/1.25 var(--serif);display:block}.academy-lesson-list a:hover strong{color:var(--teal)}.lesson-summary{display:block;color:var(--muted);font-size:13px;line-height:1.8;margin-top:8px}.lesson-status{display:inline-flex;align-items:center;font:10px/1.6 var(--mono);color:var(--muted);margin-top:8px}.lesson-status:before{content:'';width:7px;height:7px;border:1px solid #839781;border-radius:50%;margin-right:7px}.lesson-status[data-state="checked"]{color:var(--teal)}.lesson-status[data-state="checked"]:before{background:var(--teal);border-color:var(--teal)}.lesson-duration{margin-left:auto;flex-shrink:0;font:10px/1.7 var(--mono);color:var(--muted);padding-top:8px}.academy-course-aside{padding-left:25px;border-left:1px solid var(--line);align-self:start;position:sticky;top:112px}.academy-course-aside h2{font:34px/1.2 var(--serif);margin:15px 0 20px}.academy-course-aside h3{font:24px/1.3 var(--serif);margin:26px 0 9px}.academy-course-aside p,.academy-course-aside li{font-size:12px;line-height:1.9;color:var(--muted)}.academy-course-aside li a{text-decoration:underline;text-underline-offset:3px;color:var(--teal)}.academy-course-aside .text-link{margin-top:22px}
.academy-lesson-head{padding:38px 0 0;margin-bottom:38px}.academy-lesson-head .breadcrumb{margin-bottom:23px}.lesson-overline{display:flex;align-items:center;gap:20px;font:10px/1.6 var(--mono);color:var(--muted)}.lesson-overline .lesson-status{margin:0}.academy-lesson-head h1{font:clamp(42px,4.4vw,66px)/1.13 var(--serif);letter-spacing:-1px;max-width:1000px;margin:13px 0 15px;overflow-wrap:anywhere}.academy-lesson-head>p{font-size:16px;color:var(--muted);line-height:1.8;max-width:800px}.lesson-jump{display:flex;gap:32px;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-top:28px}.lesson-jump a{padding:12px 0;border-bottom:2px solid transparent;font-size:12px}.lesson-jump a:hover{border-color:var(--teal);color:var(--teal)}
.academy-lesson-layout{display:grid;grid-template-columns:245px minmax(0,850px);gap:clamp(30px,5vw,75px);align-items:start}.academy-lesson-rail{position:sticky;top:112px;padding-right:22px;border-right:1px solid var(--line);font-size:12px}.lesson-course-title{font:24px/1.3 var(--serif);display:block}.academy-lesson-rail ol,.academy-mobile-lessons ol{list-style:none;margin:20px 0;padding:0}.academy-lesson-rail li,.academy-mobile-lessons li{margin:0}.academy-lesson-rail li>a,.academy-mobile-lessons li>a{display:flex;gap:10px;padding:13px 9px;margin:0 -9px;border-left:2px solid transparent}.academy-lesson-rail li.current>a,.academy-mobile-lessons li.current>a{background:var(--academy-light);border-left-color:var(--teal)}.academy-lesson-rail strong,.academy-mobile-lessons strong{display:block;font-weight:400;font-size:12px;line-height:1.5}.academy-lesson-rail .lesson-number,.academy-mobile-lessons .lesson-number{padding-top:0;font-size:10px;min-width:16px}.academy-lesson-rail .lesson-status,.academy-mobile-lessons .lesson-status{font-size:8px;line-height:1.5}.academy-lesson-rail li>a:hover,.academy-mobile-lessons li>a:hover{color:var(--teal)}.lesson-all-paths{font-size:11px;display:block;padding:13px 0;border-top:1px solid var(--line);color:var(--teal)}.academy-mobile-lessons{display:none}
.academy-lesson-content{min-width:0;font-size:16px;line-height:1.85}.lesson-objective{padding:24px 28px;background:var(--academy-light);border-left:3px solid var(--teal)}.lesson-objective>p{font-size:16px;margin-top:8px}.lesson-objective .lesson-prerequisites{font-size:11px;line-height:1.9;color:var(--muted);margin-top:14px}.lesson-prerequisites a{text-decoration:underline;text-underline-offset:3px}.lesson-section{margin-top:46px;scroll-margin-top:112px}.lesson-section-label{font-size:9px;margin-bottom:15px;color:var(--copper)}.lesson-section h2{font:34px/1.22 var(--serif);margin:0 0 17px;letter-spacing:-.3px;overflow-wrap:anywhere}.lesson-section p{margin:0 0 18px}.lesson-concept+.lesson-concept{margin-top:34px}.academy-formula{max-width:100%;overflow-x:auto;overscroll-behavior:contain;background:#efeee7;border-left:2px solid var(--teal);padding:18px 23px;margin:21px 0 25px;font-size:18px}.academy-formula .katex-display{margin:.5em 0}.academy-formula .katex{white-space:nowrap}
.academy-example{border:1px solid var(--academy-border);padding:0 25px 24px;background:var(--white)}.academy-example details{border-bottom:1px solid var(--line)}.academy-example summary{cursor:pointer;display:flex;align-items:center;gap:14px;min-height:70px;font-size:15px;line-height:1.5;list-style:none;padding:15px 0}.academy-example summary::-webkit-details-marker{display:none}.academy-example summary:after{content:'+';font-size:20px;font-family:var(--mono);margin-left:auto;color:var(--teal)}.academy-example details[open] summary:after{content:'−'}.example-step-number{display:grid;place-items:center;width:30px;height:30px;flex-shrink:0;border:1px solid var(--academy-border);border-radius:50%;font:12px/1 var(--mono);color:var(--teal)}.academy-example details>div{padding:0 0 8px 44px;font-size:14px;line-height:1.85}.academy-example details>div p{margin-bottom:13px}.academy-example>.button{margin-top:23px}
.academy-source-links{border-top:1px solid var(--line);margin-top:23px}.academy-source-links>a{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--teal)}.academy-source-links small{display:block;font-size:11px;color:var(--muted);margin-top:5px}.academy-source-links>a:hover{text-decoration:underline;text-underline-offset:4px}.lesson-recap{padding:26px;background:var(--academy-light)}.lesson-recap ul{font-size:14px;margin:16px 0 25px}.lesson-recap li{margin:8px 0}.academy-note{font-size:11px!important;color:var(--muted);margin:10px 0 0!important}.academy-lesson-pagination{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:39px;border-block:1px solid var(--line);padding:23px 0}.academy-lesson-pagination>a{font:23px/1.3 var(--serif)}.academy-lesson-pagination>a:last-child{text-align:right}.academy-lesson-pagination small{display:block;font:9px/1.6 var(--mono);text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:9px}.academy-lesson-pagination a:hover{color:var(--teal)}
.academy-print-practice{margin-top:24px;border:1px solid var(--line);padding:0 18px;font-size:13px}.academy-print-practice>summary{min-height:54px;cursor:pointer;display:list-item;padding:15px 0;font-size:12px;color:var(--teal)}.academy-print-practice>p{font-size:12px;color:var(--muted)}.academy-print-practice>ol>li{padding:12px 0;border-top:1px solid var(--line)}.academy-print-practice>ol>li details{margin:15px 0}.academy-print-practice>ol>li details summary{cursor:pointer;padding:8px 0;color:var(--teal)}.academy-print-practice details>p{padding:12px 15px;background:var(--academy-light)}
.academy-load-note{padding:22px 25px;background:var(--academy-light);font-size:13px;line-height:1.85}.academy-load-note a{text-decoration:underline;text-underline-offset:3px}.academy-practice{border:1px solid var(--academy-border);background:var(--white);padding:29px;margin-top:22px}.academy-practice-heading{border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:20px}.academy-practice-heading h2,.academy-practice-heading h3{font:29px/1.25 var(--serif);margin:0 0 10px}.academy-practice-heading p{font-size:12px;color:var(--muted);margin:9px 0 0}.academy-question{border:0;padding:0;margin:0 0 20px;min-width:0}.academy-question legend{font-size:18px;font-weight:600;line-height:1.65;margin-bottom:22px;max-width:100%;padding:0}.academy-question legend:focus{outline:2px solid var(--teal);outline-offset:7px}.academy-options{display:grid;gap:11px}.academy-option{position:relative;display:flex;align-items:flex-start;gap:13px;border:1px solid var(--line);padding:13px 15px;min-height:50px;cursor:pointer;font-size:14px;line-height:1.65;background:var(--paper);border-radius:3px}.academy-option:has(input:checked){border-color:var(--teal);background:var(--academy-light);box-shadow:0 0 0 1px var(--teal)}.academy-option:hover{border-color:var(--teal)}.academy-option input{accent-color:var(--teal);width:18px;height:18px;flex-shrink:0;margin:3px 0 0}.academy-option input:focus-visible{outline-offset:5px}.academy-option:has(input:disabled){cursor:default}.academy-answer-label{display:block;font-size:12px;color:var(--muted);margin-bottom:7px}.academy-answer{width:min(100%,320px);background:#fffefb;border:1px solid #9fac99;padding:13px 15px;min-height:48px;border-radius:3px;font-size:18px}.academy-answer[aria-invalid=true]{border-color:var(--copper);outline:1px solid var(--copper)}.academy-practice-actions{display:flex;gap:11px;flex-wrap:wrap;align-items:center;margin-top:21px}.academy-practice .button,.academy-progress-tools .button,.academy-lab .button{background:var(--academy-green);border-color:var(--academy-green);font-size:12px}.academy-practice .button-secondary,.button-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:44px;border:1px solid var(--line);background:transparent;color:var(--ink);padding:10px 17px;border-radius:3px;font-size:12px}.button-secondary:hover{border-color:var(--teal);background:var(--academy-light)}.plain-button{background:transparent;border:0;text-decoration:underline;text-underline-offset:4px;padding:10px 4px;min-height:44px;font-size:12px;color:var(--teal)}.academy-feedback{padding:16px 18px;border-left:3px solid var(--teal);background:var(--academy-light);font-size:13px;line-height:1.85;margin-top:19px}.academy-feedback:empty{display:none}.academy-feedback p:last-child{margin-bottom:0}.academy-feedback[data-result="incorrect"],.academy-feedback[data-kind="incorrect"],.academy-feedback.is-error{border-color:var(--copper);background:#f6eadd}.academy-hints{font-size:13px}.academy-hint{padding:13px 17px;background:#f3eedc;border-left:3px solid #917228;margin:12px 0}.academy-hint p{margin:7px 0 0}.academy-summary h2,.academy-summary h3{font:31px/1.2 var(--serif)}.academy-summary p{font-size:14px;margin:15px 0}.academy-summary ul{font-size:13px;line-height:1.8}.academy-summary a{color:var(--teal);text-decoration:underline;text-underline-offset:3px}.academy-round-topics{font-size:12px;color:var(--muted);line-height:1.8;margin:0 0 22px}.academy-round-topics a{color:var(--teal);text-decoration:underline}.academy-action-status{font-size:12px;margin:14px 0;padding:12px;background:var(--academy-light);line-height:1.8}.academy-practice-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:60px;align-items:start}.academy-practice-layout>.academy-practice,.academy-practice-layout .academy-practice{margin-top:0}.academy-practice-aside{padding:25px;background:var(--academy-light)}.academy-practice-aside h2{font:37px/1.18 var(--serif);margin:12px 0 22px}.academy-practice-aside p{font-size:13px;line-height:1.9;margin-bottom:18px}.academy-practice-aside .text-link{margin:8px 15px 0 0}
/* Live labs use semantic controls, SVG plots, and equivalent numeric results. */
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/* Shared result markup and compact entry experiment. */
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