@font-face{font-family:Literata;src:url("fonts/Literata-Regular.ttf") format("truetype");font-weight:400;font-display:swap}
@font-face{font-family:Literata;src:url("fonts/Literata-SemiBold.ttf") format("truetype");font-weight:600;font-display:swap}
@font-face{font-family:"Source Sans 3";src:url("fonts/SourceSans3-Regular.ttf") format("truetype");font-weight:400;font-display:swap}
@font-face{font-family:"Source Sans 3";src:url("fonts/SourceSans3-SemiBold.ttf") format("truetype");font-weight:600;font-display:swap}
@font-face{font-family:"Source Code Pro";src:url("fonts/SourceCodePro-Regular.ttf") format("truetype");font-weight:400;font-display:swap}

:root{
  --ink:#0F0E47;--eclipse:#272757;--indigo:#505081;--periwinkle:#8686AC;
  --paper:#F7F7FA;--mist:#ECECF2;--graphite:#24242B;--secondary:#5F5F6D;
  --white:#FFFFFF;--border:#D7D7E1;--good:#2E6A55;--caution:#8A5D1F;
  --error:#9B3D4E;--info:#3C5E85;--radius:16px;--small-radius:10px;
  --shadow:0 10px 32px rgba(15,14,71,.07);--content:1120px;
}
*{box-sizing:border-box}
html{background:var(--paper);color:var(--graphite);font-family:"Source Sans 3",system-ui,sans-serif;scroll-behavior:smooth}
body{margin:0;min-height:100vh;background:var(--paper);font-size:17px;line-height:1.48}
button,input,select,textarea{font:inherit;color:inherit}
button,a{touch-action:manipulation}
button{cursor:pointer}
a{color:var(--ink)}
img{display:block;max-width:100%}
h1,h2,h3,p{margin-top:0}
h1,h2{font-family:Literata,Georgia,serif;color:var(--ink);font-weight:600;letter-spacing:-.025em}
h1{font-size:clamp(2rem,6vw,3.2rem);line-height:1.06;margin-bottom:16px}
h2{font-size:clamp(1.45rem,4vw,2rem);line-height:1.14;margin-bottom:12px}
h3{font-size:1.08rem;margin-bottom:8px;color:var(--eclipse)}
code,.mono{font-family:"Source Code Pro",monospace}
.skip-link{position:fixed;left:12px;top:-100px;z-index:100;background:var(--ink);color:white;padding:12px 16px;border-radius:8px}
.skip-link:focus{top:12px}
.app-shell{min-height:100vh;padding-bottom:76px}
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px;padding:10px max(18px,env(safe-area-inset-left));border-bottom:1px solid var(--border);background:rgba(247,247,250,.97)}
.brand-link{display:flex;align-items:center;gap:12px;text-decoration:none;min-height:48px}
.brand-symbol{width:42px;height:42px;object-fit:contain}
.brand-wordmark{display:none;width:190px;height:auto}
.product-name{padding-left:12px;border-left:1px solid var(--border);font-weight:600;color:var(--ink)}
.desktop-nav{display:none;align-items:center;gap:4px}
.desktop-nav a,.utility-button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 15px;border:0;border-radius:10px;background:transparent;text-decoration:none;font-weight:600}
.desktop-nav a:hover,.desktop-nav a:focus-visible,.utility-button:hover,.utility-button:focus-visible{background:var(--mist)}
.utility-button{border:1px solid var(--border);background:var(--white)}
.bottom-nav{position:fixed;z-index:40;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(4,1fr);padding:6px 6px max(6px,env(safe-area-inset-bottom));border-top:1px solid var(--border);background:rgba(255,255,255,.98)}
.bottom-nav a,.bottom-nav button{min-height:58px;border:0;background:transparent;border-radius:10px;text-decoration:none;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;color:var(--secondary);font-size:.78rem}
.bottom-nav a[aria-current="page"],.bottom-nav button[aria-current="page"]{background:var(--mist);color:var(--ink);font-weight:600}
.nav-glyph{font-size:1.2rem;line-height:1}
.page{max-width:var(--content);margin:0 auto;padding:28px 18px 56px}
.eyebrow{margin-bottom:9px;color:var(--indigo);font-size:.83rem;letter-spacing:.11em;text-transform:uppercase;font-weight:600}
.lede{max-width:760px;color:var(--secondary);font-family:Literata,Georgia,serif;font-size:1.08rem;line-height:1.6}
.dashboard-head{display:grid;gap:22px;align-items:end;margin-bottom:28px}
.continue-panel{padding:18px;border-top:3px solid var(--ink);background:var(--white);box-shadow:var(--shadow)}
.continue-panel small{display:block;color:var(--secondary);margin-bottom:6px}
.continue-panel strong{display:block;color:var(--ink);font-size:1.15rem;margin-bottom:14px}
.button-row{display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 18px;border:1px solid transparent;border-radius:var(--small-radius);font-weight:600;text-decoration:none;transition:background .16s,border-color .16s,transform .16s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--ink);color:white}
.btn-primary:hover,.btn-primary:focus-visible{background:var(--eclipse)}
.btn-secondary{background:var(--white);color:var(--ink);border-color:var(--periwinkle)}
.btn-secondary:hover,.btn-secondary:focus-visible{border-color:var(--ink);background:var(--mist)}
.btn-quiet{background:transparent;color:var(--ink);border-color:var(--border)}
.btn-danger{background:var(--white);color:var(--error);border-color:var(--error)}
.btn[disabled]{opacity:.42;cursor:not-allowed;transform:none}
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:22px 0 30px}
.stat{padding:15px;border-left:2px solid var(--periwinkle);background:var(--white)}
.stat strong{display:block;font-family:Literata,Georgia,serif;color:var(--ink);font-size:1.55rem}
.stat small{color:var(--secondary)}
.section-heading{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:34px 0 14px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.section-heading h2{margin:0}
.section-heading p{margin:0;color:var(--secondary);font-size:.92rem}
.module-grid{display:grid;gap:14px}
.module-card{position:relative;display:grid;grid-template-columns:6px 1fr;overflow:hidden;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 2px 0 rgba(15,14,71,.02)}
.module-rule{background:var(--module-accent,var(--indigo))}
.module-body{padding:18px}
.module-meta{display:flex;justify-content:space-between;gap:12px;color:var(--secondary);font-size:.82rem;text-transform:uppercase;letter-spacing:.06em}
.module-card h3{margin:10px 0 6px;font-family:Literata,Georgia,serif;font-size:1.35rem}
.module-title-row{display:flex;align-items:center;gap:12px;margin-top:10px}
.module-title-row h3{margin:0}
.module-icon{flex:0 0 52px;width:52px;height:52px}
.module-card p{color:var(--secondary);margin-bottom:14px}
.module-foot{display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px}
.meter{height:8px;background:var(--mist);border-radius:999px;overflow:hidden}
.meter>span{display:block;height:100%;background:var(--module-accent,var(--indigo));border-radius:inherit}
.mastery-label{font-size:.86rem;color:var(--secondary);white-space:nowrap}
.module-link{position:absolute;inset:0;z-index:1;border-radius:inherit}
.module-link:focus-visible{outline:3px solid var(--info);outline-offset:-4px}
.module-card .module-body>*{position:relative;z-index:2;pointer-events:none}
.activity-list{display:grid;gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.activity-row{display:grid;grid-template-columns:1fr auto;gap:12px;background:var(--white);padding:14px 16px}
.activity-row small{color:var(--secondary)}
.empty{padding:22px;border:1px dashed var(--periwinkle);border-radius:var(--radius);color:var(--secondary);background:var(--white)}

.module-hero{padding:4px 0 22px;border-bottom:1px solid var(--border)}
.module-hero-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px}
.module-identity{display:grid;grid-template-columns:68px minmax(0,1fr);gap:18px;align-items:start}
.module-hero-icon{width:68px;height:68px}
.module-identity h1{margin-bottom:10px}
.back-link{display:inline-flex;align-items:center;min-height:44px;text-decoration:none;font-weight:600}
.saved-status{color:var(--secondary);font-size:.9rem}
.module-actions{display:grid;gap:10px;margin-top:22px}
.mode-card{padding:17px;border:1px solid var(--border);border-radius:var(--radius);background:var(--white)}
.mode-card strong{display:block;color:var(--ink);font-size:1.06rem}
.mode-card p{margin:5px 0 13px;color:var(--secondary);font-size:.95rem}
.stage-map{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:24px 0}
.stage-step{position:relative;min-height:76px;padding:10px 8px;border-top:3px solid var(--border);background:var(--white);font-size:.78rem;color:var(--secondary)}
.stage-step[data-state="started"]{border-color:var(--periwinkle);color:var(--indigo)}
.stage-step[data-state="strong"]{border-color:var(--good);color:var(--good)}
.stage-step b{display:block;font-size:1rem;color:var(--ink)}
.coverage-note{padding:16px;border-left:3px solid var(--info);background:var(--white);color:var(--secondary)}
.lesson-list{display:grid;gap:8px}
.lesson-row{display:grid;grid-template-columns:34px minmax(0,1fr) auto;align-items:center;gap:12px;padding:13px 15px;border:1px solid var(--border);border-radius:12px;background:var(--white)}
.lesson-row[data-state="started"]{border-color:var(--periwinkle)}
.lesson-row[data-state="complete"]{border-color:#A8C5B7;background:#F5FAF7}
.lesson-number{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--mist);color:var(--ink);font-weight:600}
.lesson-row small{display:block;color:var(--secondary);margin-top:2px}
.lesson-state{color:var(--secondary);font-size:.84rem;white-space:nowrap}
.lesson-title-line{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.yield-badge{display:inline-flex;align-items:center;min-height:21px;padding:2px 7px;border-radius:999px;border:1px solid var(--border);font-size:.69rem;line-height:1;text-transform:uppercase;letter-spacing:.06em;color:var(--secondary);background:#F7F7FA}
.yield-badge[data-tier="core"]{border-color:#9FC5B3;background:#F0F8F4;color:#245643}
.yield-badge[data-tier="extended"]{border-color:#C8B5D1;background:#F8F3FA;color:#65436E}

.session-header{display:grid;gap:12px;margin-bottom:18px}
.session-progress{display:flex;align-items:center;gap:12px}
.session-progress .meter{flex:1}
.question-card{padding:20px;border:1px solid var(--border);border-radius:var(--radius);background:var(--white);box-shadow:var(--shadow)}
.question-card h1{font-size:clamp(1.55rem,5vw,2.25rem)}
.stimulus-panel{margin:18px 0;padding:16px;border:1px solid #C9CAD9;border-left:4px solid var(--periwinkle);border-radius:12px;background:#F8F8FC}
.stimulus-panel p{margin:10px 0 0;line-height:1.55}
.stimulus-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.stimulus-head span{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--secondary)}
.stimulus-table-wrap{overflow-x:auto;margin-top:14px;border:1px solid var(--border);border-radius:9px;background:var(--white)}
.stimulus-table{width:100%;border-collapse:collapse;font-size:.9rem}
.stimulus-table th,.stimulus-table td{padding:9px 11px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top;white-space:nowrap}
.stimulus-table th{background:#F0F0F6;color:var(--navy)}
.stimulus-table tbody tr:last-child td{border-bottom:0}
.instruction{color:var(--secondary);margin-bottom:18px}
.teach-list{display:grid;gap:10px;margin:18px 0;padding:0;list-style:none}
.teach-list li{padding:14px 15px;border-left:3px solid var(--periwinkle);background:var(--mist)}
.options{display:grid;gap:10px;margin:18px 0}
.option{display:flex;align-items:flex-start;text-align:left;min-height:52px;padding:13px 15px;border:1px solid var(--border);border-radius:10px;background:var(--white)}
.option:hover,.option:focus-visible{border-color:var(--indigo);background:var(--mist)}
.option.selected{border:2px solid var(--ink);background:var(--mist)}
.option.correct{border-color:var(--good);background:#EFF7F3}
.option.wrong{border-color:var(--error);background:#FBF0F2}
.work-area{display:grid;gap:12px;margin:18px 0}
.sequence-bank,.sequence-built{display:flex;flex-wrap:wrap;gap:8px;min-height:64px;padding:11px;border:1px dashed var(--periwinkle);border-radius:12px;background:var(--paper)}
.sequence-built{border-style:solid;background:var(--white)}
.token{min-height:44px;padding:8px 12px;border:1px solid var(--periwinkle);border-radius:9px;background:var(--white);font-weight:600}
.token:disabled{opacity:.35}
.built-token{display:inline-flex;align-items:center;gap:6px;background:var(--mist);border-color:var(--ink)}
.built-token .order{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;background:var(--ink);color:white;font-size:.76rem}
.sort-grid,.match-grid{display:grid;gap:10px}
.sort-row,.match-row{display:grid;gap:7px;padding:13px;border:1px solid var(--border);border-radius:10px;background:var(--paper)}
.sort-row label,.match-row label{font-weight:600}
select,.text-answer,textarea{width:100%;min-height:48px;padding:10px 12px;border:1px solid var(--periwinkle);border-radius:9px;background:var(--white)}
textarea{min-height:120px;resize:vertical;font-family:"Source Code Pro",monospace;font-size:.82rem}
input[type="range"]{width:100%;min-height:44px;accent-color:var(--ink)}
.slider-readout{font-family:"Source Code Pro",monospace;font-size:1.3rem;color:var(--ink);text-align:center}
.feedback{margin:18px 0 0;padding:16px;border-radius:12px;border-left:4px solid var(--info);background:var(--mist)}
.feedback[data-result="correct"]{border-color:var(--good);background:#EFF7F3}
.feedback[data-result="wrong"]{border-color:var(--error);background:#FBF0F2}
.feedback strong{display:block;margin-bottom:5px;color:var(--ink)}
.feedback p:last-child{margin-bottom:0}
.hint-panel{margin:16px 0;padding:14px 16px;border-left:4px solid var(--caution);background:#FFF8EE;border-radius:10px}
.hint-panel strong{display:block;color:var(--ink);margin-bottom:4px}
.hint-panel p{margin:4px 0;color:var(--secondary)}
.confusion{color:var(--secondary);font-size:.93rem}
.question-actions{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:20px}
.session-summary{text-align:left}
.summary-number{font-family:Literata,Georgia,serif;font-size:4rem;line-height:1;color:var(--ink)}
.summary-number small{font-size:1.2rem;color:var(--secondary)}
.miss-list{display:grid;gap:8px;margin:20px 0}
.miss-row{display:flex;justify-content:space-between;gap:12px;padding:12px;background:var(--mist);border-radius:9px}

.modal[hidden]{display:none}
.modal{position:fixed;z-index:80;inset:0;display:grid;align-items:end;background:rgba(10,10,15,.54);padding:12px}
.modal-card{max-height:92vh;overflow:auto;padding:20px;border-radius:18px 18px 10px 10px;background:var(--white);box-shadow:0 24px 80px rgba(10,10,15,.3)}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}
.close-button{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--border);border-radius:50%;background:var(--white);font-size:1.5rem}
.backup-note{padding:12px;border-left:3px solid var(--caution);background:#FFF8EE;color:var(--secondary)}
.file-input{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.toast{position:fixed;z-index:100;left:50%;bottom:88px;transform:translateX(-50%) translateY(20px);max-width:calc(100vw - 32px);padding:12px 16px;border-radius:10px;background:var(--graphite);color:white;opacity:0;pointer-events:none;transition:.2s}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
:focus-visible{outline:3px solid var(--info);outline-offset:3px}

@media (min-width:700px){
  .app-shell{padding-bottom:0}.topbar{padding:10px 28px}.brand-wordmark{display:block}.brand-symbol{display:none}.desktop-nav{display:flex}.bottom-nav{display:none}.page{padding:44px 28px 70px}
  .dashboard-head{grid-template-columns:minmax(0,1.5fr) minmax(280px,.75fr)}.stats-grid{grid-template-columns:repeat(4,1fr)}.module-grid{grid-template-columns:repeat(2,1fr)}
  .module-actions{grid-template-columns:repeat(3,1fr)}.stage-map{grid-template-columns:repeat(8,1fr)}.sort-row,.match-row{grid-template-columns:minmax(180px,1fr) minmax(190px,1fr);align-items:center}.session-header{grid-template-columns:1fr auto;align-items:center}
  .modal{align-items:center;justify-items:center}.modal-card{width:min(680px,94vw);border-radius:18px;padding:26px}.toast{bottom:24px}
}
@media (max-width:520px){.module-identity{grid-template-columns:52px minmax(0,1fr);gap:12px}.module-hero-icon{width:52px;height:52px}.lesson-row{grid-template-columns:30px minmax(0,1fr)}.lesson-state{grid-column:2}}
@media (min-width:1040px){.module-grid{grid-template-columns:repeat(3,1fr)}.question-card{padding:30px}.page.session-page{max-width:900px}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{.topbar,.bottom-nav,.button-row,.utility-button,.question-actions{display:none!important}.app-shell{padding:0}.page{max-width:none;padding:0}.module-card,.question-card{box-shadow:none;break-inside:avoid}}