
:root{--purple:#5946ce;--dark:#222238;--ink:#24243a;--muted:#626277;--pale:#eeebff;--surface:#fff;--bg:#f7f7fc;--border:#dedfea;--good:#206347;--amber:#855309;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);font-size:100%;line-height:1.6}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}a{color:var(--purple);text-underline-offset:4px}img{max-width:100%}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(1.9rem,3.3vw,2.7rem);letter-spacing:-.04em;line-height:1.18;font-weight:720;margin-bottom:18px}h2{font-size:1.25rem;line-height:1.4;letter-spacing:-.02em}h3{font-size:1rem}p{margin-bottom:16px}small,.small{font-size:.85rem}.muted{color:var(--muted)}strong{font-weight:650}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--purple);outline-offset:4px}fieldset{border:0;padding:0;margin:0 0 16px;min-width:0}legend{font-weight:650;margin-bottom:10px}.app-shell{display:grid;grid-template-columns:246px minmax(0,1fr);min-height:100vh}.sidebar{border-right:1px solid var(--border);background:#fff;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;padding:23px 20px;overflow:auto}.brand{display:block;background:#fff;border-radius:12px;margin-bottom:32px}.brand img{display:block;width:205px;height:auto;margin:auto}.eyebrow{font-size:.7rem;letter-spacing:.14em;font-weight:750;color:var(--purple);display:block;margin-bottom:12px}.sidebar-label{font-size:.62rem;color:var(--muted);margin-left:9px}.sidebar nav{display:grid;gap:7px}.sidebar nav a{display:flex;align-items:center;gap:13px;border-radius:9px;padding:12px;color:var(--muted);text-decoration:none;font-size:.88rem;font-weight:550}.sidebar nav a.active{background:var(--pale);color:var(--purple)}.nav-icon{font-size:1.15rem;width:21px}.sidebar-note{margin-top:auto;padding:44px 12px 24px;position:relative}.sidebar-note p{font-size:1.35rem;line-height:1.5;letter-spacing:-.03em}.line-mark{position:absolute;right:10px;bottom:10px;color:#d3cdf8;font-size:4rem}.session{border-top:1px solid var(--border);padding-top:20px;display:flex;gap:10px;align-items:center;font-size:.75rem}.session small{display:block;font-size:.68rem;color:var(--muted)}.dot{width:8px;height:8px;flex:0 0 8px;border-radius:50%;background:var(--purple)}.workspace{min-width:0;display:flex;flex-direction:column}.topbar{min-height:80px;padding:16px 40px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;background:var(--surface);gap:15px}.breadcrumb{font-size:.75rem;color:var(--muted)}.breadcrumb span{margin:0 10px;color:#aaa}.actions,.spread{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.spread{justify-content:space-between}.spread h2{margin:0}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:11px 19px;border:1px solid transparent;border-radius:8px;background:var(--purple);color:white;font-weight:650;font-size:.86rem;text-decoration:none;line-height:1.45}.button:hover{filter:brightness(.96)}.button.quiet{background:transparent;color:var(--purple);border-color:var(--border)}.button.white{background:white;color:var(--purple)}.button.small{padding:8px 12px;font-size:.78rem}.button.danger{background:#a1393d}.button.full{width:100%}main{padding:38px 42px;max-width:1480px;width:100%;margin:0 auto;flex:1}.page-head{margin-bottom:28px;max-width:820px}.page-head p{color:var(--muted);max-width:680px}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:26px;min-width:0}.card.soft{background:var(--pale);border-color:transparent}.grid{display:grid;gap:22px}.two{grid-template-columns:repeat(2,minmax(0,1fr))}.three{grid-template-columns:repeat(3,minmax(0,1fr))}.stack{display:grid;gap:18px}.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:35px;padding:12px 0 30px;align-items:center}.hero p{max-width:500px;color:var(--muted)}.hero-graph{background:linear-gradient(145deg,#efedff,#f9f9ff);padding:25px;border:1px solid #e2ddff;border-radius:20px;position:relative}.hero-graph svg{display:block;width:100%;height:auto}.hero-formula{background:white;box-shadow:0 6px 20px #30216b0c;border-radius:10px;padding:12px 20px;display:inline-block;font:italic 1.55rem Georgia,serif}.entry-card{padding:30px}.entry-number{color:var(--purple);border-radius:9px;background:var(--pale);display:inline-grid;place-items:center;width:38px;height:38px;margin-bottom:18px}.entry-card p{color:var(--muted);font-size:.9rem}.entry-card form{margin-top:20px}label{display:block;font-size:.86rem;font-weight:550;margin-bottom:16px}input:not([type=checkbox]):not([type=radio]):not([type=range]),select,textarea{display:block;width:100%;min-height:44px;border:1px solid #bcbdd0;border-radius:7px;background:var(--surface);color:var(--ink);padding:10px 12px;margin-top:7px}textarea{min-height:112px;resize:vertical}input[type=checkbox],input[type=radio]{width:20px;height:20px;accent-color:var(--purple);flex-shrink:0}input[type=range]{width:100%;min-height:35px;accent-color:var(--purple)}.check{display:flex;align-items:center;gap:10px;min-height:44px;font-weight:450;margin:0}.check input{margin:0}.form-error{color:#9a292e;font-size:.9rem;white-space:pre-line;margin-bottom:12px}.form-error:empty{display:none}.access-panel,.support-bar,.audio-bar{padding:16px 40px;border-bottom:1px solid var(--border);background:var(--surface);display:flex;gap:18px;flex-wrap:wrap;align-items:center}.access-panel label,.audio-bar label{margin:0}.access-panel select,.audio-bar select{display:inline-block;width:auto;min-height:40px;margin:0 0 0 7px}.access-panel p{width:100%;margin:0;font-size:.85rem;color:var(--muted)}.support-bar{font-size:.8rem;gap:15px}.support-bar .check{font-size:.8rem}.support-bar .spacer{flex:1}.audio-bar{background:#f0eefc}.banner{padding:12px 40px;background:#fff2da;color:#6b4b16;font-size:.88rem}.banner.info{background:var(--pale);color:var(--purple)}.progress-track{height:8px;background:#e5e2f1;border-radius:6px;overflow:hidden;margin:15px 0 8px}.progress-track>span{display:block;height:100%;background:var(--purple)}progress{width:100%;height:12px;accent-color:var(--purple)}.journey-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}.journey-row{display:flex;gap:18px;align-items:center;padding:20px 23px;background:var(--surface);border:1px solid var(--border);border-radius:12px}.journey-row.current{border:2px solid var(--purple);background:#faf9ff}.journey-row.locked{background:#f0f1f6;color:var(--muted)}.step-number{flex-shrink:0;width:38px;height:38px;background:var(--pale);border-radius:50%;display:grid;place-items:center;color:var(--purple);font-weight:650}.journey-row.done .step-number{background:#e6f3eb;color:var(--good)}.journey-row.locked .step-number{background:#e3e4ed;color:var(--muted)}.journey-title{flex:1}.journey-title strong{display:block}.journey-title small{color:var(--muted)}.badge{font-size:.69rem;letter-spacing:.02em;font-weight:700;display:inline-flex;align-items:center;padding:4px 8px;border-radius:5px;background:var(--pale);color:var(--purple);white-space:normal}.badge.amber{background:#fff0d5;color:var(--amber)}.badge.green{background:#e7f3eb;color:var(--good)}.badge.gray{background:#eeeef4;color:var(--muted)}.badge.demo{border:1px dashed #a393e0}.choice-card{position:relative;display:flex;gap:13px;padding:22px;border:1px solid var(--border);border-radius:12px;background:var(--surface);margin:0;cursor:pointer;align-items:flex-start}.choice-card:has(input:checked){border:2px solid var(--purple);padding:21px;background:#faf9ff}.choice-card strong{display:block;margin-bottom:6px;font-size:1rem}.choice-card small{color:var(--muted);font-weight:400}.narrow{max-width:850px}.notice{padding:16px 19px;border-radius:9px;background:var(--pale);color:var(--purple);font-size:.9rem;margin:18px 0}.notice.amber{background:#fff1d9;color:#765118}.notice p:last-child{margin:0}.back-link{display:inline-block;margin-bottom:20px;font-size:.86rem}.activity-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.65fr);gap:24px;align-items:start}.prompt{font-size:1.1rem;line-height:1.8}.challenge{padding:14px 18px;border-left:3px solid var(--purple);background:var(--pale);font-size:.9rem}.phase-row{display:flex;gap:7px;margin:16px 0 24px;flex-wrap:wrap}.phase-row span{font-size:.75rem;padding:6px 10px;border-radius:6px;background:#ededf4;color:var(--muted)}.phase-row .active{background:var(--pale);color:var(--purple);font-weight:700}.phase-row .done{background:#e6f3eb;color:var(--good)}.reading-content{white-space:pre-wrap;overflow-wrap:anywhere}.graph svg{display:block;width:100%;height:auto;max-height:400px}.graph-grid{stroke:#dedbea;stroke-width:1}.graph-axis{stroke:#858298;stroke-width:1.5}.graph-label{font-size:11px;fill:var(--muted)}.graph-line{stroke:var(--purple);stroke-width:3;fill:none}.formula{font:italic 1.65rem Georgia,serif;color:var(--purple);margin:12px 0}.line-description{font-size:.9rem;line-height:1.8}.data-table{border-collapse:collapse;width:100%;font-size:.85rem}.data-table th,.data-table td{padding:9px 13px;border-bottom:1px solid var(--border);text-align:left}.data-table th{background:var(--pale);color:var(--purple);font-weight:650}.data-table caption{text-align:left;padding:10px 0;font-weight:650}.details{border:1px solid var(--border);border-radius:10px;background:var(--surface);overflow:hidden}.details summary{padding:16px 20px;cursor:pointer;font-weight:600;font-size:.9rem}.details>div{padding:0 20px 20px}.attempt{border-left:3px solid #c9c1f3;padding:3px 0 3px 16px;margin:18px 0;font-size:.87rem}.attempt p{margin:5px 0;white-space:pre-wrap}.scale{display:flex;flex-wrap:wrap;gap:10px}.scale label{display:flex;gap:8px;align-items:center;border:1px solid var(--border);border-radius:7px;padding:12px;min-width:61px;margin:0}.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:23px 0}.stat{padding:19px 22px}.stat strong{display:block;font-size:1.7rem;line-height:1.3}.stat span{color:var(--muted);font-size:.74rem}.table-wrap{overflow:auto}.roster{width:100%;border-collapse:collapse;text-align:left;font-size:.82rem}.roster th{font-size:.67rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);background:#f5f5fb;padding:15px 18px;white-space:nowrap}.roster td{padding:20px 18px;border-bottom:1px solid var(--border);vertical-align:top}.roster td:first-child{min-width:155px}.roster small{display:block;font-size:.73rem;color:var(--muted);margin-top:4px}.roster .signals{min-width:195px;max-width:270px}.signal{display:block;font-size:.76rem;margin-bottom:5px;padding-left:11px;position:relative}.signal:before{content:"";width:5px;height:5px;border-radius:50%;background:var(--amber);position:absolute;left:0;top:8px}.roster-card{padding:0;overflow:hidden}.roster-heading{padding:22px 24px;display:flex;gap:15px;align-items:center;justify-content:space-between;flex-wrap:wrap}.roster-heading h2{margin:0}.live{font-size:.74rem;color:var(--good);display:flex;gap:8px;align-items:center}.live .dot{background:var(--good)}.empty{padding:38px;text-align:center;color:var(--muted)}.toolbar{display:flex;gap:14px;align-items:end;flex-wrap:wrap}.toolbar label{margin:0;flex:1;min-width:180px}.toolbar select{margin-bottom:0}.class-grid{display:grid;grid-template-columns:minmax(280px,.6fr) minmax(0,1fr);gap:24px;align-items:start}.code-box{background:var(--pale);border-radius:8px;padding:12px 16px;font:1.25rem ui-monospace,monospace;letter-spacing:.12em;display:block;margin:15px 0;overflow-wrap:anywhere;color:var(--purple)}.invitations{font:1rem ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere;line-height:2;background:var(--pale);padding:20px}.sequence-editor{list-style:none;padding:0;display:grid;gap:8px}.sequence-editor li{display:flex;align-items:center;gap:8px;border:1px solid var(--border);padding:10px 13px;border-radius:8px;font-size:.82rem}.sequence-editor li span{flex:1}.mini{background:transparent;border:1px solid var(--border);border-radius:6px;color:var(--purple);min-width:40px;min-height:40px}.rule{border:0;border-top:1px solid var(--border);margin:25px 0}.message{padding:20px;border:1px solid var(--border);border-radius:10px;background:var(--surface)}.message.unread{border-left:4px solid var(--purple)}.message p{white-space:pre-wrap;overflow-wrap:anywhere}.message time{font-size:.76rem;color:var(--muted)}.timeline{list-style:none;padding:0;display:grid;gap:15px}.timeline li{border-left:2px solid #d9d2f4;padding:0 0 2px 17px;font-size:.85rem}.timeline p{margin:5px 0}.timeline time{font-size:.72rem;color:var(--muted)}.review-item{border-top:1px solid var(--border);padding:20px 0}.review-item p{white-space:pre-wrap}.review-item select{max-width:400px}dialog{width:calc(100vw - 32px);max-width:540px;border:1px solid var(--border);border-radius:16px;padding:28px;background:var(--surface);color:var(--ink)}dialog::backdrop{background:#1d174e70}dialog h2{margin:0}dialog .spread{margin-bottom:18px}#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--dark);color:white;padding:14px 22px;border-radius:10px;max-width:min(640px,90vw);z-index:50;font-size:.9rem;box-shadow:0 8px 20px #0002}#toast.error{background:#8f3033}.skip-link{position:fixed;left:20px;top:-100px;z-index:100;background:var(--purple);color:white;padding:14px}.skip-link:focus{top:12px}footer{padding:23px 42px;border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:15px;color:var(--muted);font-size:.72rem}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}[hidden]{display:none!important}.reading-space main{line-height:2;letter-spacing:.025em}.reading-space p{max-width:65ch}.high-contrast{--purple:#31138d;--ink:#111;--dark:#000;--muted:#353535;--border:#777;--bg:#fff;--pale:#eae6fc;--good:#084a20;--amber:#633700}.high-contrast .graph-grid{stroke:#aaa}.high-contrast .sidebar,.high-contrast .topbar,.high-contrast .card{background:#fff}.high-contrast .hero-graph{background:#f0ecff}.high-contrast .graph-label{fill:#111}
@media(max-width:1150px){.app-shell{grid-template-columns:210px minmax(0,1fr)}.sidebar{padding:20px 13px}.topbar{padding:17px 26px}.breadcrumb{display:none}main{padding:30px 26px}.activity-layout,.class-grid{grid-template-columns:1fr}.hero{gap:22px}.stats{gap:10px}.stat{padding:16px}.stat span{font-size:.7rem}}
@media(max-width:760px){.app-shell{display:block}.sidebar{position:relative;height:auto;padding:13px 16px;border-right:0;border-bottom:1px solid var(--border)}.brand{margin:0 auto 12px;width:180px}.sidebar-label,.sidebar-note,.session{display:none}.sidebar nav{display:flex;justify-content:center;gap:5px;flex-wrap:wrap}.sidebar nav a{font-size:.76rem;padding:10px}.nav-icon{display:none}.topbar{min-height:65px;padding:10px 18px;justify-content:flex-end}main{padding:27px 18px}.hero{grid-template-columns:1fr;padding-top:0;gap:16px}.hero-graph{max-width:430px;padding:18px}.hero-graph svg{max-height:210px}.two,.three{grid-template-columns:1fr}.card,.entry-card{padding:21px}.roster-card{padding:0}.stats{grid-template-columns:1fr 1fr}.journey-row{padding:17px 14px;gap:12px;flex-wrap:wrap}.journey-row .button{margin-left:50px}.step-number{width:34px;height:34px}.journey-title{min-width:150px}.access-panel,.support-bar,.audio-bar,.banner{padding:12px 18px}.support-bar{gap:8px 14px}.support-bar .spacer{display:none}.activity-layout{gap:18px}.prompt{font-size:1rem}.toolbar{align-items:stretch}.toolbar .button{align-self:end}.roster-heading{padding:20px}.card .actions{gap:8px}footer{padding:20px 18px;font-size:.7rem;flex-wrap:wrap}.choice-card{padding:18px}.choice-card:has(input:checked){padding:17px}h1{font-size:2rem}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media print{.sidebar,.topbar,.access-panel,.support-bar,.audio-bar,footer,.button,#toast{display:none!important}.app-shell{display:block}main{padding:0}.card{break-inside:avoid}.roster{font-size:.7rem}}


.collab-content{margin-top:24px}.hypothesis p,.visit-card p{white-space:pre-wrap;overflow-wrap:anywhere}.hypothesis{border-top:3px solid var(--purple)}.visit-card{padding:20px 0;border-top:1px solid var(--border)}.visit-card:first-of-type{border-top:0}.collab-content .details{margin-top:12px}#group-admin .card{padding:18px}#group-admin [data-remove-member]{margin-left:8px}.collab-content .phase-row{flex-wrap:wrap}.collab-content textarea{min-height:100px}

#collab-live>section{margin-top:20px}#collab-live>.stats{margin-bottom:20px}main:focus-visible{outline:2px solid var(--purple);outline-offset:-2px}

/* Introduction and assessment representations share the same data and descriptions. */
.representation-alternative{margin-top:14px;border-top:1px solid var(--border)}.representation-alternative>summary{min-height:44px;padding:10px 4px;cursor:pointer;font-size:.9rem;font-weight:600}.representation-alternative>div{padding:8px 0}.representation-alternative[open]>summary{margin-bottom:6px}
/* Persistent notices stay in document flow: no reading deadline or covered controls. */
.audio-description{flex-basis:100%;margin:0}
.topbar>.actions{flex-wrap:wrap;justify-content:flex-end}.topbar>.actions>.button{white-space:normal}
#toast{position:static;transform:none;max-width:none;margin:16px 40px 0;padding:16px 20px;box-shadow:none;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;background:var(--pale);color:var(--ink);border:1px solid var(--border)}#toast p{margin:0;flex:1 1 240px;overflow-wrap:anywhere}#toast.error{background:#fff1f1;color:#81282c;border-color:#ad5a5e}#toast .button{flex-shrink:0}
/* Long words, text enlargement and forced colors must not hide an operation. */
.skip-link:not(:focus){clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap;padding:0}
.button,label,.formula,h1,h2,h3,summary{overflow-wrap:anywhere}input,select,textarea{max-width:100%;min-width:0}.graph svg{overflow:visible}.data-table td,.data-table th{overflow-wrap:anywhere}html{scroll-padding-block:16px}:focus-visible{scroll-margin-block:16px}.form-error:focus{outline:2px solid currentColor;outline-offset:4px}.high-contrast .graph-axis{stroke:#111;stroke-width:2}.high-contrast .graph-line{stroke:#31138d;stroke-width:4}.high-contrast #toast.error{background:#fff;color:#711015;border-color:#711015}
@media(max-width:760px){#toast{margin:12px 18px 0}.access-panel label,.audio-bar label{max-width:100%}.access-panel select,.audio-bar select{max-width:100%;margin-left:0}.stats .stat{min-width:0}.data-table th,.data-table td{padding-inline:8px}}
@media(forced-colors:active){.graph-grid{stroke:GrayText}.graph-axis{stroke:CanvasText}.graph-line{stroke:LinkText;stroke-width:4}.graph-point{fill:LinkText;stroke:Canvas}.graph-label{fill:CanvasText}.button,.choice-card,.badge,.phase-row span{border:1px solid ButtonText}.button:disabled{opacity:1;color:GrayText}.button:focus-visible,a:focus-visible,summary:focus-visible{outline-color:Highlight}}
.assessment-page{max-width:1080px}.assessment-layout{display:grid;grid-template-columns:minmax(260px,.9fr) minmax(260px,1fr);gap:30px;align-items:start;margin-top:24px}.assessment-support{min-width:0;background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:18px}.assessment-support .formula{margin:0 0 10px}.assessment-support .graph{max-width:370px;margin:auto}.assessment-support .data-table th,.assessment-support .data-table td{width:50%}.assessment-support .line-description{margin:14px 0}.graph-point{fill:var(--purple);stroke:var(--surface);stroke-width:1.5}.answer-options{display:grid;gap:9px}.answer-options .choice-card{padding:13px;align-items:center;min-height:48px}.answer-options .choice-card:has(input:checked){padding:12px}.answer-options input{margin:0}.answer-options span{font-size:.9rem}.answer-panel textarea{min-height:90px}.assessment-support input{min-width:90px}.intro-instructions{padding-left:23px}.intro-instructions li{margin-bottom:15px}.review-item .assessment-support{max-width:560px;margin:18px 0}.review-item .assessment-support .graph{max-width:270px}
@media(max-width:850px){.assessment-layout{grid-template-columns:1fr;gap:22px}.assessment-support .graph{max-width:330px}.assessment-support{padding:15px}}

