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@media(min-width:1600px){.hero{min-height:345px}.hero h1{font-size:49px}.content{padding:38px 45px}.hero-copy{max-width:630px}}
@media(max-width:1250px){:root{--sidebar:208px}.sidebar{padding:23px 14px}.content{padding:26px}.topbar{padding:0 26px}.hero{padding:31px}.hero h1{font-size:37px}.hero-copy{max-width:460px}.hero:after{width:56%}.lesson-layout{grid-template-columns:minmax(0,1fr) 245px;gap:18px}.next-lesson{grid-template-columns:1fr 215px}.studio-launch{grid-template-columns:repeat(3,1fr)}.login-art{padding:40px}.login-art h2{font-size:42px}.rubric{grid-template-columns:1fr 1fr}}
@media(max-width:1000px){:root{--sidebar:190px}.sidebar .brand{font-size:24px}.brand img{width:30px}.nav-link{font-size:12px;padding:11px 8px}.content{padding:22px}.hero h1{font-size:33px}.hero-copy{max-width:390px}.hero:after{width:55%;opacity:.65}.hero p{max-width:320px}.next-lesson{grid-template-columns:1fr}.next-aside{border-left:0;border-top:1px solid #333b58;padding:20px 28px}.unit-grid{grid-template-columns:1fr 1fr}.unit-card:last-child:nth-child(3){display:none}.lesson-layout{grid-template-columns:1fr}.lesson-rail{grid-template-columns:1fr 1fr;padding-top:0}.stats{gap:13px}.stat strong{font-size:25px}.two-col{grid-template-columns:1fr}.three-col{grid-template-columns:1fr 1fr}.login-shell{grid-template-columns:1fr .9fr}.login-art{padding:28px}.login-art h2{font-size:36px}.login-form-side{padding:40px 9%}.login-form-side h1{font-size:29px}}
@media(max-width:760px){:root{--sidebar:0px}.sidebar{width:230px;transform:translateX(-100%);transition:transform .2s}.sidebar.open{transform:translateX(0);box-shadow:0 0 0 100vw #050b18ab}.app-main{margin-left:0}.topbar{height:64px;padding:0 17px;gap:10px;position:sticky;top:0;z-index:10}.mobile-menu{display:inline-flex;padding:7px;min-height:36px}.breadcrumb{display:none}.user-pill>span{display:none}.class-select{max-width:190px}.content{padding:21px 17px}.hero{padding:27px 23px;min-height:345px}.hero h1{font-size:35px}.hero-copy{max-width:430px}.hero:after{width:80%;opacity:.37;background-position:right center}.hero p{max-width:360px}.stats{grid-template-columns:1fr 1fr;row-gap:20px;padding-bottom:22px}.stat:nth-child(2){border:0}.stat strong{font-size:25px}.stat .eyebrow{font-size:9px}.next-main{padding:23px}.next-main h2{font-size:23px}.next-aside{padding:20px 23px}.unit-grid{grid-template-columns:1fr}.unit-card:last-child:nth-child(3){display:flex}.unit-card{min-height:180px}.unit-card .icon{margin-bottom:18px}.section-head h2{font-size:22px}.section-head .text-link{font-size:12px}.studio-band{align-items:start;flex-direction:column;padding:22px 17px;gap:16px}.studio-band .row{width:100%}.page-title h1{font-size:30px}.panel{padding:22px}.step-tabs{gap:6px}.step-tabs button{font-size:11px;gap:5px;padding:10px 5px;flex-direction:column}.step-tabs .step-number{font-size:10px;width:21px;height:21px}.lesson-head h1{font-size:28px}.lesson-head .row{align-items:start}.lesson-rail{grid-template-columns:1fr}.lesson-body{padding:21px}.prose{font-size:14px;line-height:1.9}.worked{padding:17px}.evidence-grid{grid-template-columns:1fr}.three-col{grid-template-columns:1fr}.unit-block summary{padding:18px;gap:10px}.unit-block summary h3{font-size:16px}.unit-block summary .unit-index{font-size:24px;width:32px}.unit-block summary .tag{font-size:9px}.lesson-row{padding:14px 15px;gap:10px;grid-template-columns:30px 1fr auto}.lesson-goal{display:none}.lesson-row .tag{font-size:9px;padding:3px 5px}.unit-block{padding:0}.studio-launch{grid-template-columns:1fr 1fr}.lab-frame{height:780px}.page-footer{flex-direction:column;margin-top:28px}.login-shell{display:block}.login-art{min-height:290px;padding:32px;align-items:end}.login-art h2{font-size:34px;max-width:370px}.login-art p{font-size:12px}.login-form-side{padding:30px 25px 38px}.login-form-side>.brand{margin-bottom:40px}.login-form-side h1{font-size:31px}.login-form-side form{max-width:100%}.login-form-side>.muted{max-width:100%}.login-form-side .fine{max-width:100%}.rubric{grid-template-columns:1fr 1fr}.review-content{padding:18px}.modal{padding:23px}.page-title .row{align-items:start}.actions{gap:8px}.hero .actions .button{font-size:12px;padding:12px 13px}.topbar .user-pill{margin-left:auto}}
@media(max-width:360px){.class-select{max-width:150px}.hero h1{font-size:30px}.hero{padding:23px 19px}.rubric{grid-template-columns:1fr}.lesson-row{grid-template-columns:25px 1fr}.lesson-row .tag{grid-column:2;justify-self:start}.step-tabs button{font-size:10px}.content{padding:18px 12px}.lesson-body{padding:17px}.studio-launch{grid-template-columns:1fr 1fr}.hero .actions{flex-direction:column;align-items:start}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}.reduce-motion *{animation:none!important;transition:none!important;scroll-behavior:auto!important}

/* Keep account controls on one line without clipping the fixed-height header. */
.topbar>.row{flex-wrap:nowrap;min-width:0;justify-content:flex-end}.topbar .class-select{width:auto;min-width:150px;flex:0 1 240px}.topbar .user-pill{flex-shrink:0}.topbar .user-pill>span{max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar .quiet{flex-shrink:0}.course-filters select{width:auto;min-width:160px}.class-select option{font:inherit}
@media(max-width:760px){.topbar>.row{gap:8px;flex:1}.topbar .class-select{min-width:100px;max-width:180px}.topbar .user-pill{margin-left:0}.topbar .user-pill>span{display:none}.topbar .avatar{width:30px;height:30px}.topbar .quiet{padding:7px}}

.sidebar-close,.menu-scrim{display:none}@media(max-width:760px){.sidebar-close{display:inline-flex;position:absolute;right:10px;top:20px;min-height:30px;padding:4px}.menu-scrim:not([hidden]){display:block;position:fixed;inset:0;z-index:19;background:#0309169c;border:0;border-radius:0}.sidebar.open{z-index:20;box-shadow:none}}
/* Advanced course: same design system, readable workbenches and gradual support. */
.learning-tracks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin:25px 0 30px}
.track-summary{border-top:2px solid #7161b8;padding:20px 2px 10px;min-width:0}
.track-summary:nth-child(2){border-color:#50bcca}.track-summary h3{font-size:23px;margin:12px 0 8px}.track-summary p{color:var(--muted);font-size:14px;line-height:1.6;max-width:530px}.track-summary progress{margin-top:15px;width:100%}.track-summary .row{flex-wrap:wrap;gap:9px}
.course-toolbar{grid-template-columns:minmax(180px,1fr) minmax(160px,220px) minmax(150px,200px)}.unit-intro{padding:5px 24px 20px;color:var(--muted);line-height:1.7}.unit-block summary>span:nth-child(2){min-width:0}.unit-block summary small{line-height:1.6;display:block}.workbench-label{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:12px 0;color:#bfb6ff;font-weight:650}.workbench-label span{font-size:12px;color:var(--muted);font-weight:400}
.fixture-details{margin:14px 0 20px;border:1px solid var(--border);border-radius:12px;padding:14px 16px;min-width:0}.fixture-details summary,.worked-trace summary{cursor:pointer;font-weight:600;line-height:1.5}.fixture-details[open] summary{margin-bottom:12px}.workbench-table{position:relative;margin:14px 0;border:1px solid var(--border);border-radius:9px;max-width:100%;overflow:auto}.workbench-table table{width:100%;font-size:13px}.workbench-table caption{text-align:left;padding:12px;font-weight:650;color:#bfb6ff;background:#141e30}.workbench-table td,.workbench-table th{white-space:nowrap;padding:10px 12px}.null-value{font-size:12px;color:#bdb3eb;font-style:italic}.virtual-file{margin:12px 0;border-top:1px solid var(--border);padding-top:12px}.virtual-file strong{font-family:monospace;font-size:12px;overflow-wrap:anywhere;color:#7bdded}.virtual-file pre{font-family:monospace;font-size:13px;line-height:1.7;white-space:pre-wrap;overflow-wrap:anywhere;color:#d6e1ed;margin:8px 0}
.execution-result{border-top:1px solid var(--border);padding-top:12px;margin-top:20px;min-width:0}.execution-result .code-output{white-space:pre-wrap;overflow-wrap:anywhere}.learning-rhythm{display:flex;gap:20px;flex-wrap:wrap;margin-bottom:25px;color:#b6aadf;font-size:13px}.learning-rhythm span{display:flex;gap:7px;align-items:center}.prediction-block{margin-top:25px;padding:18px 20px;background:#111e2c;border-left:3px solid #51b7c7;border-radius:0 12px 12px 0}.prediction-block h3{margin:0 0 12px}.prediction-block .field{margin-bottom:8px}.worked-trace{padding:20px;margin:22px 0}.worked-trace[open] summary{margin-bottom:14px}.concept-caution{margin:24px 0;padding-left:16px;border-left:3px solid #a48bc9}.concept-caution p{color:var(--muted);line-height:1.7;margin-bottom:0}.vocabulary-line{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:18px 0 24px}.vocabulary-line>.small-note{flex-basis:100%;margin:0 0 4px}.hint-step{border-top:1px solid var(--border);padding-top:12px;margin-top:16px}.hint-step .prose{font-size:15px}.reading-shelf{margin:16px 0}.reading-shelf summary{cursor:pointer;font-weight:600}.reading-shelf a{display:flex;align-items:center;gap:6px;font-size:12px;margin:12px 0;overflow-wrap:anywhere}
.lesson-layout>div,.lesson-body,.lesson-rail{min-width:0}.lesson-head .eyebrow{line-height:1.7}.lesson-head h1{overflow-wrap:break-word}.track-summary a{font-size:13px}.lesson-rail .execution-result .code-output{max-height:300px;overflow:auto}
@media(max-width:850px){.course-toolbar{display:flex;flex-wrap:wrap}.course-toolbar input{width:100%;flex-basis:100%}.course-toolbar select{flex:1;min-width:140px}.learning-tracks{grid-template-columns:1fr;gap:10px}.unit-intro{padding:3px 14px 16px}.workbench-table td,.workbench-table th{padding:9px}.fixture-details{padding:12px}.learning-rhythm{gap:12px}.prediction-block{padding:14px}.unit-block summary h3{font-size:17px}.track-summary h3{font-size:21px}}
@media(max-width:420px){.workbench-label span{flex-basis:100%}.lesson-head .row{flex-wrap:wrap}.learning-rhythm{font-size:12px}.fixture-details{padding:10px}.unit-block summary{gap:8px}.unit-block summary>.tag{font-size:10px}.track-summary .eyebrow{font-size:10px}}

/* 4.1 Play Lab. Schematic instruments use native HTML/SVG; no painted fake UI.
   Inherits the existing NEXUS navy/violet/cyan tokens. */
.mission-invitation{padding:23px 24px;margin:0 0 28px;background:#132b3b;border:1px solid #29506a;border-radius:15px}
.mission-invitation p{font-size:19px;line-height:1.5;color:#edf5ff;margin:12px 0 18px;max-width:660px}.mission-invitation small{display:block;color:#b4c6d6;font-size:12px;line-height:1.6;margin-top:13px}
.play-eyebrow{font-size:10px;letter-spacing:.15em;font-weight:750;color:#9de3ed;line-height:1.7;display:block}
.unit-play-details{border:1px solid #335366;border-radius:15px;margin-bottom:30px;background:#111d2c;overflow:hidden}
.unit-play-details>summary{padding:16px 20px;font-size:14px;line-height:1.6;font-weight:600;cursor:pointer;color:#a9eaf3}
.unit-play-details[open]>summary{border-bottom:1px solid #304451}
.playground{padding:24px;background:#101b2a;min-width:0;color:#e4edfb}
.playground-top{display:flex;gap:20px;align-items:start;justify-content:space-between}.playground h3{font-size:23px;letter-spacing:-.02em;margin:9px 0 0}.playground h4{font-size:14px;margin:0 0 12px;color:#ced9eb}
.live-label{font-size:10px;line-height:1.5;color:#b4c8d8;display:flex;gap:6px;align-items:center;max-width:125px}.live-label i{width:6px;height:6px;background:#78d0b2;border-radius:50%;flex-shrink:0}
.play-story{font-size:14px;line-height:1.75;color:#afc2d6;margin:14px 0 20px}.play-modebar{display:flex;align-items:center;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.play-modebar button{font-size:12px;padding:8px 14px;min-height:34px;border:1px solid transparent;background:transparent;color:#b5c3d7}.play-modebar button.active{background:#25344c;border-color:#496181;color:#eef5ff}.play-modebar .play-reset{margin-left:auto;color:#9fbbce;text-decoration:underline;text-underline-offset:3px}
.play-target{display:flex;align-items:center;gap:13px;padding:15px 18px;background:#172537;border:1px solid #364e6b;border-radius:11px;margin-bottom:22px}.play-target>span{font-size:25px;color:#9cb6d6}.play-target strong{display:block;font-size:14px;line-height:1.5;font-weight:600}.play-target small{display:block;color:#b1c3d4;margin-top:5px;line-height:1.6;font-size:12px}.play-target.target-met{border-color:#38816f;background:#163329}.target-met>span{color:#9fe7c6}
.play-instrument{padding:20px;background:#0a1320;border:1px solid #2c405a;border-radius:12px;min-width:0}.play-two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:22px;align-items:start}.play-two>*{min-width:0}
.play-instrument button{min-height:37px;font-size:12px;padding:9px 12px;border-color:#3b506a;background:#17263b;color:#d9e7f6;line-height:1.45}.play-instrument button:hover:not(:disabled){background:#253b57;border-color:#7193b7}.play-instrument button.primary{background:#7660da;border-color:#a994ff;color:white}.play-instrument button.is-on{background:#1c4448;border-color:#4c999b;color:#c4ffff}.play-instrument button[aria-pressed]{margin:0 4px 8px 0}.play-instrument button:disabled{opacity:.5;cursor:not-allowed}.play-actions{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.play-control{display:block;margin:0 0 17px;font-size:12px;color:#b4c6da}.play-control>span{display:flex;justify-content:space-between;gap:12px;line-height:1.7;margin-bottom:8px}.play-control output{font-family:monospace;color:#dbd1ff;font-size:13px}.play-control input[type=range]{padding:0;width:100%;min-height:26px;accent-color:#9b83ff;background:transparent;border:0;box-shadow:none}.play-control select{font-size:13px;padding:10px 12px;min-height:40px;background:#142236;color:#eef4ff}
.play-metric{padding:12px 0;border-bottom:1px solid #283b51;min-width:0}.play-metric strong{display:block;font-size:29px;line-height:1.2;font-weight:650;letter-spacing:-.035em;color:#e8f5ff;overflow-wrap:anywhere}.play-metric span{display:block;font-size:11px;color:#a4bdd0;margin-top:7px}.play-meter{display:block;margin:15px 0}.play-meter>span{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:#aac3d6}.play-meter b{font-weight:500;color:#d5e8f7}.play-meter progress{width:100%;height:9px;margin-top:10px;accent-color:#74c8b4}
.play-observation{margin:19px 0 0;padding:12px 0 0;border-top:1px solid #294058;min-height:70px}.play-observation>strong{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:#86d5e3}.play-observation>p{font-size:13px;line-height:1.65;color:#d0deed;margin:9px 0 0;overflow-wrap:anywhere}.play-bottom{display:flex;gap:9px;flex-wrap:wrap;border-top:1px solid #294058;padding-top:16px;margin-top:14px}.play-bottom button{font-size:11px;min-height:33px;padding:7px 10px;background:transparent;color:#c4baff}.play-bottom>span{flex-basis:100%;font-size:11px;color:#9aafc5;line-height:1.6}.play-instrument .small-note{font-size:11px;color:#a9bfd5;line-height:1.7}.play-instrument p{line-height:1.65}
.play-folder-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:20px}.play-file-row{display:flex;align-items:center;gap:7px;margin-bottom:7px}.play-file-row .file-pick{display:flex;gap:9px;align-items:center;text-align:left;flex:1;min-width:0;margin:0;font-size:12px}.file-pick span:last-child{min-width:0;overflow-wrap:anywhere}.file-pick small{display:block;font-size:10px;color:#91b5c9;margin-top:4px}.file-symbol{font-size:23px;color:#b0a2f2}.play-destinations{display:flex;flex-direction:column;gap:8px}.destination{text-align:left}.destination strong{display:block;font-family:monospace;font-size:14px;color:#b7dce8}.destination small{display:block;font-size:10px;font-weight:400;color:#a8b6cb;margin-top:5px}
.case-counter{font-family:monospace;font-size:12px;color:#a496d8;margin-bottom:20px}.evidence-claim{padding:22px;border-left:3px solid #a28aec;background:#172033;min-height:175px}.evidence-claim>span{font-size:11px;color:#baa9e0}.evidence-claim h3{font-size:24px;line-height:1.45;letter-spacing:0;margin:12px 0 20px}.evidence-slip{background:#243747;border-radius:8px;padding:15px;color:#cfe8f1;font-size:14px;line-height:1.65}.case-stamps{display:flex;gap:7px;margin-top:20px}.case-stamps span{font-size:12px;border:1px solid #344358;border-radius:5px;padding:7px 10px;color:#7f93ad}.case-stamps .is-correct{color:#9de8ce;border-color:#449983}
.machine-display{background:#111f2d;border:1px solid #34516b;border-radius:12px;padding:24px;min-height:290px}.machine-display h3{font-size:26px;margin:14px 0 20px;line-height:1.35}.status-lamp{width:12px;height:12px;border-radius:50%;background:#ce875f}.status-lamp.online{background:#85d4b0}
.network-diagram{width:100%;height:auto;min-height:180px;margin-bottom:20px}.network-diagram line{stroke:#334759;stroke-width:3;stroke-dasharray:6 5}.network-diagram line.connected{stroke:#7c75c3;stroke-dasharray:none}.network-diagram line.packet-route{stroke:#89dfc6;stroke-width:5}.network-diagram circle{fill:#192a42;stroke:#7191bd;stroke-width:2}.network-diagram text{fill:#eff2fc;font-size:16px;font-family:inherit}.network-diagram .node-name{fill:#b0c6dc;font-size:10px}.link-switches{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 14px}
.receipt-head{padding:0 0 15px;border-bottom:1px dashed #52667b;font-size:10px;color:#aaa3c8;letter-spacing:.09em;line-height:1.7}.budget-balance{margin-top:22px;padding:15px;border:1px solid #416056;border-radius:9px;font-size:12px}.budget-balance strong{font-size:27px;display:block;margin-top:8px}.budget-balance.positive{color:#a2e2cb;background:#122c25}.budget-balance.negative{color:#f0b5aa;background:#33211f;border-color:#78493f}
.pixel-editor{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;max-width:280px;gap:2px;padding:5px;border:1px solid #5a6790;background:#303652;border-radius:9px}.pixel-editor .pixel-cell{min-width:0;min-height:0;padding:0;margin:0;border:0;border-radius:2px;aspect-ratio:1}.ink-0{background:#101c2c!important}.ink-1{background:#9d83eb!important}.ink-2{background:#61cddd!important}.ink-3{background:#f1cb71!important}.ink-4{background:#e7effb!important}.pixel-cell:focus-visible{outline:3px solid white;outline-offset:-3px;z-index:2}.pixel-mini{display:grid;grid-template-columns:repeat(8,1fr);width:80px;height:80px;border:1px solid #526684}.pixel-mini i{display:block}.route-grid{display:grid;grid-template-columns:repeat(5,1fr);aspect-ratio:1;max-width:330px;border:1px solid #375875;border-radius:8px;overflow:hidden}.route-cell{display:flex;align-items:center;justify-content:center;background:#142535;border:1px solid #273e53;min-width:0;min-height:38px}.route-cell small{font-size:9px;color:#698699}.route-cell.wall{background:#3b4864}.route-cell.wall small{opacity:.35}.route-cell.goal{background:#26483e;font-size:9px;color:#b2f2d9}.courier{font-size:28px;color:#d7caff;line-height:1}.command-tape{max-height:200px;overflow:auto;display:flex;flex-wrap:wrap;gap:6px;margin:16px 0;border:1px solid #2e4359;padding:10px;border-radius:7px;min-height:65px}.command-tape span{font-family:monospace;font-size:11px;padding:5px;background:#202d43;border-radius:4px}.command-tape .current-command{color:#baffee;border:1px solid #589e92}
.arcade-readout{display:grid;gap:10px;background:#191933;padding:18px;border:1px solid #4b4274;border-radius:10px}.arcade-readout .play-metric{border-color:#423765}.layout-preview{border:1px solid #8295b2;border-radius:8px;background:#eef1f8;color:#202839;padding:16px;display:grid;gap:10px}.layout-preview header,.layout-preview h3,.layout-preview footer{grid-column:1/-1}.layout-preview header{font-size:10px;letter-spacing:.16em;color:#654db1}.layout-preview h3{color:#212a41;font-size:19px;line-height:1.4;margin:0 0 12px}.layout-preview article{padding:12px 9px;background:white;border:1px solid #d8deeb;border-radius:6px;min-width:0;overflow-wrap:normal}.layout-preview article strong{font-size:11px}.layout-preview article p{font-size:10px;line-height:1.6;color:#586175}.layout-preview footer{font-size:9px;color:#45516c}.layout-preview.cols-1{grid-template-columns:1fr}.layout-preview.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.layout-preview.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.layout-preview.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.layout-preview.text-readable article p{font-size:12px}.motion-track{width:100%;background:#102336;border-radius:10px}.motion-track path{stroke:#7796a9;stroke-width:3}.motion-track .barrier{fill:#e4ae78}.motion-track .moving-object{fill:#ad96f2;stroke:#e8e0ff;stroke-width:3}.motion-track text{fill:#b9d6e8;font-size:12px}
.prediction-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.prediction-card{border:1px solid #376250;border-radius:7px;padding:10px;background:#112720;font-size:10px;line-height:1.7}.prediction-card>*{display:block}.prediction-card strong{color:#bee4d2;font-size:12px}.prediction-card.incorrect{border-color:#925849;background:#32211e}.prediction-card.incorrect strong{color:#f2b4a7}.prediction-card small{font-size:9px;color:#c4cbd9}.confusion-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.confusion-grid .play-metric strong{font-size:24px}
.feature-row{display:grid;grid-template-columns:minmax(0,1fr) 110px 100px;align-items:center;gap:10px;margin-bottom:9px}.feature-row>span{font-size:10px;color:#b3bace}.feature-row button{text-align:left}.collection-belt{display:flex;gap:8px;flex-wrap:wrap;min-height:140px;align-items:center;border-top:3px solid #514972;border-bottom:3px solid #514972;padding:17px 0}.collection-item{background:#32284b;border:1px solid #8d73bb;border-radius:8px;padding:12px;text-align:center;min-width:51px}.collection-item small{display:block;color:#c5b2e8;font-size:9px}.collection-item strong{display:block;font-size:25px;color:#f4eaff;margin-top:7px}.taken-items{padding:18px 0;font-size:12px;color:#a9d2cf;overflow-wrap:anywhere}.search-array{display:grid;grid-template-columns:repeat(11,minmax(0,1fr));gap:4px;margin:5px 0 25px}.search-slot{border:1px solid #3e5876;border-radius:6px;padding:9px 2px;text-align:center;background:#142538}.search-slot small{display:block;font-size:9px;color:#91a7bd}.search-slot strong{display:block;font-size:17px;margin-top:7px}.search-slot.visited{border-color:#bd9dee;background:#352b4e}.search-slot.excluded{opacity:.4}.search-slot.found{border-color:#96edc2;background:#214837}.mini-data{width:100%;font-size:12px;border-collapse:collapse}.mini-data caption{text-align:left;color:#a3bdcf;font-size:11px;padding:0 0 12px}.mini-data th,.mini-data td{padding:10px 8px;border-bottom:1px solid #2d4159;text-align:left;white-space:normal}.mini-data th{font-size:11px;color:#bdaef0}
.http-console{border:1px solid #3b5c73;border-radius:10px;overflow:hidden;background:#0c2130}.http-console header{font-size:9px;letter-spacing:.12em;color:#93d1db;background:#16364a;padding:13px}.http-console pre{padding:18px;font-family:monospace;font-size:12px;line-height:1.85;color:#bbd7e6;white-space:pre-wrap}.http-status{text-align:center;font-family:monospace;font-size:50px;color:#aedbec;padding-bottom:12px}.http-status small{font-family:inherit;display:block;font-size:10px;color:#a0b7ce;margin-top:5px}.http-console>.small-note{padding:0 14px 12px}.merge-columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.merge-columns>section{padding:12px;background:#172338;border:1px solid #394764;border-radius:7px}.merge-columns small{display:block;font-size:10px;color:#beafe0}.merge-columns code{display:block;margin:16px 0;color:#d4eaff;font-size:13px;overflow-wrap:anywhere;white-space:normal}.merge-columns button{font-size:11px}.merge-result{display:flex;justify-content:space-between;gap:15px;padding:20px 0;border-top:1px solid #314961;border-bottom:1px solid #314961;margin:18px 0;font-size:13px}.merge-result code{color:#b8e6d4}.commit-track{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.play-chip{padding:6px 9px;background:#27354a;border:1px solid #476183;border-radius:5px;font-size:11px;color:#d2e4f1;overflow-wrap:anywhere}
.address-display{padding:16px 0;font-family:monospace;font-size:27px;color:#b7edee;overflow-wrap:anywhere}.address-display>span{color:#bb9ef8}.address-range{display:flex;gap:12px;border-top:1px solid #36506c;border-bottom:1px solid #36506c;padding:17px 0}.address-range>span{font-size:10px;color:#a5bbd1;flex:1}.address-range strong{font-family:monospace;display:block;font-size:15px;color:#e0e6f7;margin-top:5px}.permission-gate{padding:22px;border:1px solid #5f5078;border-radius:10px;min-height:265px;background:#211d30}.permission-gate>span{font-size:10px;letter-spacing:.12em;color:#c0ade8}.permission-gate h3{font-size:29px;margin:17px 0}.permission-gate p{font-size:13px;color:#baafcb}.permission-gate code{font-size:11px;white-space:normal;line-height:1.7;color:#d3ecea}.permission-gate.gate-open{border-color:#619c84;background:#1a342b}.permission-gate.gate-closed{border-color:#b47c63;background:#3a2a24}.play-chart{width:100%;height:auto;min-height:170px;background:#101e31;border:1px solid #2b4561;border-radius:9px}.chart-axis{stroke:#7892ac;fill:none;stroke-width:1}.play-chart text{fill:#9fb9d2;font-size:11px}.chart-dot{fill:#75d2d0;stroke:#d6faff;stroke-width:1}.chart-dot.alternate{fill:#b8a1f4;stroke:#dfceff}.chart-line{fill:none;stroke:#9782d9;stroke-width:2}.job-queue{display:flex;gap:8px;flex-wrap:wrap;min-height:67px;background:#111f30;border:1px solid #32435e;padding:14px;border-radius:9px;margin:10px 0 20px}.job-queue p{font-size:12px;color:#8fa6bf}
/* Mission controls replace long dropdown lists, not learning requirements. */
.mission-bench{margin:8px 0 18px}.bench-title{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}.bench-title h3{font-size:24px;margin:0}.bench-title>span{font-size:11px;color:#9bb0c7}.mission-bench>p{font-size:14px;color:#bcc9dc;line-height:1.75;margin:14px 0 25px}.decision-cases{display:flex;flex-direction:column;gap:17px}.decision-case{min-width:0;border:1px solid #36465e;border-radius:12px;padding:18px 20px 20px;margin:0;background:#111c2a}.decision-case legend{padding:0 9px;font-size:14px;line-height:1.6;color:#e0e8f4;font-weight:550;max-width:100%}.case-index{display:inline-flex;align-items:center;justify-content:center;width:25px;height:25px;border-radius:50%;font-size:11px;background:#334365;color:#c9d8ed;margin-right:6px;flex-shrink:0}.decision-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.decision-option{display:flex;gap:10px;align-items:start;padding:13px 15px;border:1px solid #35475e;border-radius:9px;cursor:pointer;min-width:0;background:#162335;line-height:1.6;font-size:13px;transition:border-color .12s,background-color .12s}.decision-option:hover{border-color:#8a82c7;background:#212e47}.decision-option input{flex-shrink:0;margin-top:4px;accent-color:#ae93ff}.decision-option span{overflow-wrap:anywhere}.decision-option.selected{background:#342b55;border-color:#9e83e9;color:#f3eaff}.decision-case.passed{border-color:#467e69}.decision-case.needs-repair{border-color:#a08159}.case-feedback{font-size:11px;line-height:1.7;color:#c4d4e0;margin:15px 0 0}.number-cases{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.number-case{display:flex;flex-direction:column;gap:12px;background:#111e30;border:1px solid #3b4d68;padding:18px;border-radius:11px;min-width:0}.number-case input{font-family:monospace;font-size:23px;max-width:100%;padding:14px;border-color:#546c8e;background:#0d1724;color:#dbcfff}.number-case-label{font-size:13px;line-height:1.6;color:#d9e4f3}.number-case small{font-size:11px;color:#d2c1a5}.number-case.passed{border-color:#519c7f}.number-case.needs-repair{border-color:#bb8a5d}.procedure-tape{position:relative}.procedure-tape .order-item{background:#122438;border-color:#3b566e;margin-bottom:11px;border-radius:10px;padding:13px}.procedure-tape .order-item .label{font-size:13px;line-height:1.6}.procedure-tape .lesson-number{background:#263d59;color:#bad8f0;border-radius:5px}
.project-choice{padding:20px 0;margin:0 0 10px}.project-choice h3{font-size:23px;margin:0 0 12px}.lens-buttons{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.lens-buttons button{font-size:12px;padding:11px 14px;border-color:#4c4b6c}.lens-buttons button.is-on{background:#342d50;border-color:#ae94e6;color:#e9deff}.chosen-brief{font-size:13px;line-height:1.9;padding:14px 18px;border-left:3px solid #9f81d5;background:#1c1d32;border-radius:0 8px 8px 0;color:#b6b9d0}.chosen-brief strong{font-size:14px;color:#dcd5fa}.automatic-note{background:#132f33;border:1px solid #35626a;border-radius:10px;padding:18px;margin:18px 0}.automatic-note strong{font-size:14px;color:#bce8e9}.automatic-note p{font-size:12px;line-height:1.7;color:#b0cacc;margin:8px 0 0}.portfolio-report{margin:18px 0;border:1px solid #3b485e;border-radius:10px;padding:15px}.portfolio-report summary{font-size:13px;color:#bcb3e4;cursor:pointer;line-height:1.65}.portfolio-report[open] summary{margin-bottom:22px}.evidence-mode select{font-size:13px}.custom-experiment{border:1px solid #40717b;background:#102b33;border-radius:10px;padding:17px;margin:20px 0}.custom-experiment summary{cursor:pointer;font-weight:600;font-size:14px;color:#afe9e6;line-height:1.6}.custom-experiment[open]>summary{margin-bottom:17px}.custom-experiment .code-output{max-height:250px;overflow:auto}.custom-experiment .field textarea{font-family:monospace;font-size:13px}.objective-receipt{padding:18px;border:1px solid #405d6c;border-radius:11px;background:#132530;margin:20px 0}.objective-receipt summary{font-size:13px;font-weight:600;cursor:pointer;line-height:1.6;color:#b6e2e1}.objective-receipt pre{font-family:monospace;white-space:pre-wrap;overflow-wrap:anywhere;font-size:11px;line-height:1.7;max-height:260px;overflow:auto;color:#b8d7e4}.objective-receipt p{font-size:12px}.receipt-checks{display:flex;flex-direction:column;gap:7px;color:#b6dfc8;font-size:12px}.experience-pulse{margin-top:30px;padding-top:22px;border-top:1px solid #4f5277}.experience-pulse h3{font-size:19px}.experience-pulse #feeling-status{font-size:12px;color:#a7dbbc;line-height:1.6}
@media(max-width:1250px){.play-two,.play-folder-grid{grid-template-columns:1fr}.playground{padding:18px}.play-instrument{padding:17px}.machine-display{min-height:210px}.play-folder-grid{gap:24px}.play-destinations{display:grid;grid-template-columns:1fr 1fr}.playground h3{font-size:22px}.play-chart{max-height:240px}.pixel-editor{max-width:260px}.collection-belt{min-height:100px}.arcade-readout{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.arcade-readout .play-metric strong{font-size:21px}.play-two .layout-preview{max-width:440px}.prediction-cards{grid-template-columns:repeat(4,minmax(0,1fr))}.feature-row{grid-template-columns:minmax(0,1fr) 95px 95px}}
@media(min-width:1251px){.lesson-layout{grid-template-columns:minmax(0,1fr) 260px}.playground .play-two{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr)}}
@media(max-width:600px){.playground{padding:15px}.playground-top{gap:10px}.playground h3{font-size:21px}.live-label{max-width:90px;font-size:9px}.play-instrument{padding:14px}.play-story{font-size:12px}.play-eyebrow{font-size:9px}.play-target{padding:13px;gap:10px}.play-target strong{font-size:12px}.play-target small{font-size:11px}.decision-options,.number-cases{grid-template-columns:1fr}.decision-case{padding:14px 12px}.decision-case legend{font-size:12px}.decision-option{font-size:12px;padding:12px}.bench-title h3{font-size:21px}.play-destinations{grid-template-columns:1fr}.play-file-row .file-pick{font-size:11px}.network-diagram .node-name{font-size:11px}.network-diagram{min-height:155px}.case-stamps{flex-wrap:wrap}.evidence-claim{padding:15px}.evidence-claim h3{font-size:20px}.prediction-cards{grid-template-columns:1fr 1fr}.feature-row{grid-template-columns:minmax(0,1fr) 90px;gap:7px;padding-bottom:10px;border-bottom:1px solid #283b51}.feature-row>span{grid-column:1;grid-row:2}.feature-row>button:last-child{grid-column:2;grid-row:1/3}.search-array{grid-template-columns:repeat(6,minmax(0,1fr))}.merge-columns{grid-template-columns:1fr}.merge-columns>section{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.merge-columns small{min-width:85px}.merge-columns code{margin:0;font-size:12px;flex:1}.merge-columns button{flex-basis:100%}.address-display{font-size:23px}.mission-invitation{padding:18px}.mission-invitation p{font-size:17px}.unit-play-details>summary{padding:14px;font-size:12px}.play-modebar button{font-size:11px;padding:8px 10px}.play-bottom>button{min-height:36px}.play-instrument button{min-height:40px}.pixel-editor .pixel-cell{min-height:0}.play-chart{min-height:140px}.arcade-readout{grid-template-columns:1fr}.arcade-readout .play-metric{display:flex;gap:15px;justify-content:space-between;align-items:center}.lens-buttons{flex-direction:column}.lens-buttons button{text-align:left}.play-metric strong{font-size:26px}.play-instrument .mini-data{font-size:11px}.mini-data th,.mini-data td{padding:9px 5px}}
@media(prefers-reduced-motion:reduce){.decision-option{transition:none}.playground *{scroll-behavior:auto!important}}
/* Actual function results drive these diagrams; they are not canned victories. */
.live-outcome{margin:18px 0;padding:22px;border:1px solid #3c4167;border-radius:14px;background:#11182c;overflow:hidden}
.outcome-header{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:18px}.outcome-header>span{font-size:11px;letter-spacing:.1em;color:#84d8df}.outcome-header code{max-width:100%;overflow-wrap:anywhere;font-size:13px;color:#c4b5fd}.stock-scene{display:flex;gap:24px;justify-content:space-between;align-items:center}.stock-boxes{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;max-width:220px;color:#bcadff;font-size:28px}.stock-boxes>span{border:1px solid #575477;border-radius:5px;padding:2px 8px;background:#23233f}.before-after{display:grid;grid-template-columns:minmax(0,1fr) 30px minmax(0,1fr);align-items:center;gap:15px}.before-after>div{min-width:0}.result-arrow{color:#8c82b2;font-size:24px}.value-slots{display:flex;flex-wrap:wrap;gap:7px;margin:10px 0}.value-slots>span{display:flex;flex-direction:column;padding:8px 12px;background:#212c46;border:1px solid #3d4864;border-radius:7px;min-width:45px;max-width:100%;overflow-wrap:anywhere}.value-slots small{font-size:10px;color:#9ca9c7}.value-slots strong{font-size:18px;font-family:ui-monospace,monospace}.value-slots .found-value{border-color:#80d6c6;background:#173c3b;color:#b7ffed}.scalar-output{display:block;font-size:24px;font-family:ui-monospace,monospace;margin:8px 0;overflow-wrap:anywhere}.predicate-result{display:flex;gap:18px;align-items:center;padding:16px;border-radius:10px}.predicate-result>span{font-size:35px}.predicate-true{background:#153836;color:#b7eece}.predicate-false{background:#382943;color:#f1c1e0}.predicate-result p{font-size:13px}.stock-scene h3{margin:8px 0}.live-outcome>.small-note{margin-top:16px}
@media(max-width:600px){.live-outcome{padding:15px}.stock-scene{flex-direction:column;align-items:start}.before-after{grid-template-columns:1fr}.result-arrow{transform:rotate(90deg);justify-self:center}.value-slots>span{padding:7px}.outcome-header code{font-size:11px}}

/* Authenticator enrollment: native UI, scan-safe QR, existing NEXUS tokens. */
.mfa-page.loading{max-width:930px;padding:clamp(16px,4vw,48px);margin:auto}
.mfa-page>.panel{padding:clamp(20px,4vw,36px)}
.mfa-page h1{font-size:clamp(27px,4vw,38px);line-height:1.15;margin:24px 0 12px}
.mfa-page h2,.mfa-recovery h2{font-size:23px;line-height:1.25;margin:0 0 14px}
.mfa-page p{line-height:1.6}
.mfa-steps{list-style:none;display:flex;gap:20px;margin:28px 0;padding:22px 0;border-block:1px solid var(--line)}
.mfa-steps li{display:flex;align-items:center;gap:10px;flex:1;color:var(--muted);font-size:12px}
.mfa-steps li>span{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:28px;height:28px;border:1px solid var(--line);border-radius:50%;font-size:12px}
.mfa-steps .active{color:#e6e1ff}.mfa-steps .active>span{background:#363052;border-color:#7d69cd}
.mfa-steps .icon{width:15px;height:15px}
.mfa-grid{display:grid;grid-template-columns:minmax(210px,280px) minmax(0,1fr);gap:32px;align-items:start}
.mfa-scan{text-align:center;min-width:0}.mfa-qr{background:#fff;border-radius:12px;padding:10px;max-width:300px;margin:0 auto;color:#111}
.mfa-qr img{display:block;width:100%;height:auto;aspect-ratio:1;image-rendering:pixelated}
.mfa-account{margin:15px 0 9px;overflow-wrap:anywhere}.mfa-account strong,.mfa-account span{display:block}.mfa-account span{color:var(--muted);font-size:12px;margin-top:3px}
.mfa-private{display:flex;gap:6px;align-items:start;justify-content:center}.mfa-private .icon{width:15px;height:15px;flex-shrink:0;margin-top:3px}
.mfa-instructions{min-width:0}.mfa-instructions .mfa-otp{font-family:ui-monospace,monospace;font-size:27px;letter-spacing:.24em;padding:13px;max-width:230px}
.mfa-instructions .mfa-otp::placeholder{color:#8692a8;opacity:.75}
#mfa-error:empty{display:none}.mfa-instructions button[type=submit]{width:100%;justify-content:center;white-space:normal}
.mfa-manual{margin-top:26px;border:1px solid var(--line);border-radius:10px;padding:17px 20px}
.mfa-manual summary{cursor:pointer;font-weight:600;font-size:13px}.mfa-manual p{font-size:13px;color:var(--muted)}
.mfa-manual .secret-box{display:block;font-size:15px;white-space:normal;user-select:all}
.mfa-settings{font-size:13px;display:grid;gap:9px}.mfa-settings>div{display:flex;flex-wrap:wrap;gap:8px}.mfa-settings dt{color:var(--muted)}.mfa-settings dd{margin:0;overflow-wrap:anywhere}
.mfa-footer{border-top:1px solid var(--line);padding-top:16px;margin-top:24px}
.mfa-recovery{max-width:640px;margin:0 auto}.mfa-recovery .secret-box{line-height:1.9;font-size:16px}
@media(max-width:700px){.mfa-grid{grid-template-columns:1fr;gap:24px}.mfa-steps{gap:8px}.mfa-steps li{flex-direction:column;align-items:flex-start;font-size:11px;gap:7px}.mfa-qr{max-width:250px}.mfa-page .brand{max-width:100%}.mfa-recovery .actions{align-items:stretch;flex-direction:column}.mfa-page button{white-space:normal}.mfa-page>.panel{padding:18px}.mfa-manual{padding:15px}}
@media print{#mfa-qr,#mfa-secret,.mfa-qr{display:none!important}}

.mfa-instructions form{margin:22px 0 16px}
/* 4.2: staged sign-in, shared-device defaults, private classroom access. */
.easy-login .login-form-side{padding:64px 9%;min-width:0}.easy-login .login-form-side>.brand{margin-bottom:42px}.easy-login .login-form-side h1{font-size:39px;letter-spacing:-.055em}.easy-login .login-intro{margin-bottom:28px;font-size:15px}.school-summary{display:flex;gap:14px;align-items:center;padding:12px 0 20px;margin:0 0 22px;border-bottom:1px solid var(--line)}.school-summary[hidden]{display:none}.school-summary>.icon{color:var(--cyan)}.school-summary>div{flex:1;min-width:0}.school-summary small{display:block;color:var(--muted);font-size:12px}.school-summary strong{display:block;font-size:14px;overflow-wrap:anywhere}.password-wrap{position:relative;display:flex;width:100%;align-items:center}.password-wrap>input{padding-right:76px;width:100%;min-width:0}.password-wrap>button{position:absolute;right:6px;top:6px;bottom:6px;min-height:30px;padding:5px 11px;color:#c5b3ff;background:#1c2a3e;font-size:12px}.private-device{align-items:flex-start;margin:2px 0 6px;font-size:13px}.private-device input{margin-top:4px;flex-shrink:0}.private-device small{display:block;line-height:1.6;font-size:12px;color:var(--muted);margin-top:4px}.easy-login .auth-error:empty{min-height:0;margin:0}.easy-login .auth-error:not(:empty){margin:13px 0;font-size:13px;line-height:1.7}.easy-login .full-width{max-width:440px;width:100%}.login-divider{max-width:440px;display:flex;align-items:center;gap:14px;margin:22px 0 16px;color:var(--muted);font-size:12px}.login-divider:before,.login-divider:after{content:'';height:1px;flex:1;background:var(--line)}.outlined{border-color:#394963}.code-caption{max-width:440px;text-align:center;font-size:12px;line-height:1.6;margin:10px 0 0;color:var(--muted)}.access-code-input{font-family:ui-monospace,Consolas,monospace;font-size:26px;letter-spacing:.11em;width:100%;min-width:0}.verified-password{display:flex;align-items:center;gap:10px;padding:14px 16px;margin-bottom:27px;border:1px solid #33534c;border-radius:10px;background:#142723;font-size:13px;color:#a8e3ca}.school-link-help{margin-top:24px;border-top:1px solid var(--line);padding-top:18px}.school-link-help summary{cursor:pointer;font-size:13px;color:var(--purple)}.school-link-help[open] summary{margin-bottom:18px}.quick-code-card{display:grid;grid-template-columns:220px minmax(0,1fr);align-items:center;gap:25px;margin:24px 0}.classroom-qr{display:block;width:220px;max-width:100%;height:auto;background:white;border:8px solid white;border-radius:8px;image-rendering:pixelated}#private-code{font-size:24px;letter-spacing:.065em}#private-login-link{overflow-wrap:anywhere;font-size:12px}#browser-access:empty{display:none}#browser-access form{max-width:390px}.easy-login input:not([type=checkbox]){min-height:47px}
@media(max-width:1000px){.easy-login .login-form-side{padding:44px 9%}.easy-login .login-form-side h1{font-size:32px}.quick-code-card{grid-template-columns:180px minmax(0,1fr)}.classroom-qr{width:180px}}
@media(max-width:760px){.easy-login .login-form-side{padding:35px 25px}.easy-login .login-form-side>.brand{margin-bottom:34px}.easy-login .login-form-side h1{font-size:33px}.easy-login .login-art{min-height:265px}.easy-login .full-width,.login-divider,.code-caption{max-width:100%}.easy-login .login-form-side .login-footer{margin-top:22px}.easy-login .login-intro{margin-bottom:20px}.quick-code-card{grid-template-columns:1fr;justify-items:center;gap:18px}.quick-code-card>div{width:100%}.classroom-qr{width:220px}.access-code-input{font-size:24px}.school-summary{gap:10px}.school-summary strong{font-size:13px}}
@media(prefers-reduced-motion:reduce){.easy-login *{scroll-behavior:auto;transition:none}}