:root{--purple:#62549b;--purple-2:#494071;--purple-3:#8a78c9;--pink:#ff3b91;--teal:#27c7ba;--blue:#2499e8;--bg:#f7f6fb;--panel:#fff;--text:#3d3b46;--muted:#8f8b9c;--line:#ebe8f1;--shadow:0 3px 16px rgba(57,45,91,.08);--sidebar:294px;--top:68px}html[data-theme=dark]{--bg:#171922;--panel:#222530;--text:#edf0f7;--muted:#9da4b4;--line:#343845;--shadow:0 4px 18px rgba(0,0,0,.22)}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}button,input,textarea{font:inherit}.app-shell{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar);background:linear-gradient(180deg,#63559a 0%,#4a426f 100%);color:#eeeaff;z-index:50;display:flex;flex-direction:column;box-shadow:5px 0 22px rgba(54,43,88,.14)}.brand{height:68px;display:flex;align-items:center;gap:11px;padding:0 20px;color:#fff;text-decoration:none;background:rgba(255,255,255,.04)}.brand img{width:39px;height:39px;object-fit:contain}.brand span{display:flex;flex-direction:column}.brand strong{font-size:17px}.brand small{font-size:11px;opacity:.65;margin-top:2px}.sidebar-search{margin:13px 14px 11px;background:rgba(25,20,50,.42);border-radius:5px;display:flex;align-items:center;padding:0 12px}.sidebar-search i{opacity:.55}.sidebar-search input{width:100%;border:0;outline:0;background:transparent;color:#fff;padding:12px 9px}.sidebar-search input::placeholder{color:#d1cce3}.nav{overflow:auto;padding-bottom:18px}.nav-section{margin:0;padding:14px 28px 11px;border-top:1px solid rgba(255,255,255,.05);font-weight:600;font-size:14px}.nav-section i{width:27px;opacity:.58}.nav a,.nav button{width:100%;border:0;background:transparent;color:#d8d3eb;text-decoration:none;display:flex;align-items:center;gap:12px;padding:13px 30px;text-align:left;cursor:pointer}.nav a i,.nav button i{width:22px;text-align:center;opacity:.62}.nav a:hover,.nav button:hover,.nav .active{background:rgba(21,17,48,.22);color:#fff}.nav .active{border-left:4px solid var(--teal);padding-left:26px}.nav b{margin-left:auto;background:var(--teal);color:#fff;font-size:9px;padding:3px 6px;border-radius:10px}.sidebar-foot{margin-top:auto;padding:17px 24px;border-top:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:10px}.sidebar-foot div{display:flex;flex-direction:column}.sidebar-foot strong{font-size:12px}.sidebar-foot small{font-size:10px;opacity:.55}.status-dot,.online-pulse{width:9px;height:9px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(39,199,186,.17)}.workspace{margin-left:var(--sidebar);min-height:100vh}.topbar{height:var(--top);position:sticky;top:0;z-index:35;background:var(--panel);border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 27px;box-shadow:0 1px 7px rgba(0,0,0,.03)}.icon-btn,.panel-icon{border:1px solid var(--line);background:var(--panel);color:var(--muted);border-radius:5px;width:43px;height:38px;cursor:pointer;position:relative}.icon-btn:hover,.panel-icon:hover{color:var(--purple)}.global-search{margin-left:24px;color:var(--muted);display:flex;gap:14px;align-items:center;font-size:14px}.top-actions{margin-left:auto;display:flex;align-items:center;gap:8px}.top-actions em{position:absolute;right:-3px;top:-5px;background:var(--pink);color:#fff;border-radius:10px;font-style:normal;font-size:9px;padding:2px 5px}.profile-avatar{width:38px;height:38px;border-radius:50%;object-fit:cover;margin-left:8px}.page{padding:25px 34px 40px;max-width:1600px;margin:auto}.breadcrumbs{font-size:12px;color:var(--muted);display:flex;gap:9px}.breadcrumbs a{color:var(--purple-3);text-decoration:none}.page-title-row{display:flex;justify-content:space-between;align-items:center;margin:28px 0 23px}.page-title-row h1{font-size:27px;margin:0 0 5px;font-weight:600}.page-title-row h1 i{font-size:22px;color:var(--purple-3);margin-right:8px}.page-title-row p{margin:0;color:var(--muted);font-size:13px}.title-actions{display:flex;gap:10px;align-items:center}.score-chip{border:1px solid var(--line);background:var(--panel);padding:9px 12px;border-radius:5px;font-size:12px}.score-chip i{color:#ffbd32}.btn{border:0;border-radius:5px;padding:10px 14px;cursor:pointer;font-weight:600}.btn.ghost{border:1px solid var(--line);background:var(--panel);color:var(--text)}.btn.primary{background:var(--purple);color:#fff}.btn.full{width:100%}.study-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:24px}.panel{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:5px}.tutor-panel{min-height:690px;display:flex;flex-direction:column;overflow:hidden}.panel-head{min-height:55px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 17px}.panel-head>div:first-child{display:grid;grid-template-columns:auto 1fr;align-items:center;column-gap:10px}.panel-head .online-pulse{grid-row:1/3}.panel-head small{font-size:10px;color:var(--muted)}.panel-head.compact{min-height:52px}.panel-head.compact strong{font-size:13px}.panel-head.compact>i{color:var(--purple-3)}.panel-icon{width:34px;height:32px}.chat{flex:1;min-height:480px;max-height:calc(100vh - 325px);overflow:auto;padding:24px;background:linear-gradient(180deg,rgba(98,84,155,.025),transparent)}.welcome{text-align:center;max-width:650px;margin:45px auto;padding:10px}.welcome-icon{width:72px;height:72px;border-radius:50%;margin:auto;display:grid;place-items:center;color:#fff;font-size:27px;background:linear-gradient(135deg,var(--purple),var(--purple-3));box-shadow:0 12px 30px rgba(98,84,155,.22)}.welcome h2{margin:20px 0 8px}.welcome p{color:var(--muted);font-size:14px;line-height:1.7}.starter-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:25px}.starter-grid button{padding:12px;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:6px;cursor:pointer}.starter-grid button:hover{border-color:var(--purple-3);color:var(--purple)}.message{display:flex;align-items:flex-start;gap:11px;margin:0 0 25px;max-width:88%}.message.user{margin-left:auto;justify-content:flex-end}.message .avatar{width:36px;height:36px;border-radius:50%;object-fit:cover}.message-stack{max-width:100%}.bubble{padding:14px 17px;border-radius:5px;line-height:1.72;font-size:14px;word-break:break-word}.assistant .bubble{background:var(--bg);border:1px solid var(--line)}.user .bubble{background:linear-gradient(135deg,var(--purple),#7665b3);color:#fff}.markdown h1,.markdown h2,.markdown h3{margin:4px 0 10px}.markdown h1{font-size:20px}.markdown h2{font-size:18px}.markdown h3{font-size:16px}.markdown p{margin:0 0 11px}.markdown p:last-child{margin-bottom:0}.markdown ul,.markdown ol{padding-left:22px}.markdown code{background:rgba(98,84,155,.1);padding:2px 5px;border-radius:3px}.message-actions{display:flex;gap:6px;margin-top:7px}.message-actions button{border:0;background:transparent;color:var(--muted);font-size:11px;cursor:pointer;padding:5px}.message-actions button:hover{color:var(--purple)}.visual-note{margin-top:9px;border:1px dashed #a99dd1;background:rgba(98,84,155,.055);padding:11px;border-radius:5px;display:flex;gap:10px;align-items:flex-start}.visual-note i{color:var(--purple)}.visual-note div{display:flex;flex-direction:column;font-size:11px;line-height:1.5}.visual-note em{margin-left:auto;color:var(--muted);font-size:9px;font-style:normal}.typing{display:flex;align-items:center;gap:5px;padding:7px 24px}.typing img{width:27px;height:27px;border-radius:50%;margin-right:4px}.typing span{width:6px;height:6px;background:var(--purple-3);border-radius:50%;animation:bounce 1s infinite}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}@keyframes bounce{50%{transform:translateY(-4px)}}.composer-wrap{padding:13px 18px 15px;border-top:1px solid var(--line)}.composer{display:flex;align-items:flex-end;border:1px solid var(--line);border-radius:5px;background:var(--bg);padding:7px}.composer textarea{flex:1;resize:none;border:0;outline:0;background:transparent;color:var(--text);padding:8px;max-height:150px}.composer button{width:42px;height:39px;border:0;border-radius:5px;background:var(--purple);color:#fff;cursor:pointer}.composer button:disabled{opacity:.55}.composer-wrap>small{display:block;color:var(--muted);font-size:9px;margin:7px 2px 0}.right-column{display:flex;flex-direction:column;gap:18px}.quick-list button{display:flex;align-items:center;width:100%;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--text);padding:14px;cursor:pointer;text-align:left}.quick-list button:last-child{border-bottom:0}.quick-list button:hover{background:var(--bg)}.quick-list button>i{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:rgba(98,84,155,.1);color:var(--purple)}.quick-list span{display:flex;flex-direction:column;margin-left:10px}.quick-list b{font-size:12px}.quick-list small{font-size:10px;color:var(--muted);margin-top:3px}.progress-panel{padding-bottom:15px}.progress-ring{width:100px;height:100px;border-radius:50%;display:grid;place-items:center;margin:22px auto 10px;background:conic-gradient(var(--purple) 0 25%,var(--line) 25% 100%);position:relative}.progress-ring:before{content:'';position:absolute;inset:8px;background:var(--panel);border-radius:50%}.progress-ring span{z-index:1;font-weight:700}.progress-panel p{text-align:center;color:var(--muted);font-size:11px;padding:0 24px}.progress-panel .btn{margin:5px 15px 0;width:calc(100% - 30px)}.tip-panel{display:flex;gap:12px;padding:16px}.tip-panel>i{color:#ffaf26;font-size:20px}.tip-panel strong{font-size:12px}.tip-panel p{font-size:10px;color:var(--muted);line-height:1.6;margin:5px 0}.modal{position:fixed;inset:0;background:rgba(24,20,38,.55);display:none;align-items:center;justify-content:center;z-index:100;padding:20px}.modal.open{display:flex}.modal-card{width:min(720px,100%);max-height:90vh;overflow:auto;background:var(--panel);border-radius:7px;box-shadow:0 20px 70px rgba(0,0,0,.3)}.modal-head{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border-bottom:1px solid var(--line)}.modal-head h2{margin:0;font-size:19px}.modal-head p{margin:4px 0 0;color:var(--muted);font-size:11px}.quiz-content{padding:20px}.quiz-question{padding:16px 0;border-bottom:1px solid var(--line)}.quiz-question h3{font-size:14px}.options{display:grid;gap:8px}.options button{display:flex;align-items:center;gap:9px;text-align:left;border:1px solid var(--line);background:var(--bg);color:var(--text);padding:10px;border-radius:5px;cursor:pointer}.options span{width:25px;height:25px;border-radius:50%;display:grid;place-items:center;background:var(--panel)}.options button.correct{border-color:#22a875;background:rgba(34,168,117,.1)}.options button.wrong{border-color:#e14d67;background:rgba(225,77,103,.08)}.feedback{color:var(--muted);font-size:11px;line-height:1.5}.quiz-loading,.empty-state{text-align:center;padding:45px;color:var(--muted)}.toast{position:fixed;right:25px;bottom:25px;background:#332e46;color:#fff;padding:12px 16px;border-radius:5px;box-shadow:var(--shadow);opacity:0;transform:translateY(15px);pointer-events:none;transition:.2s;z-index:130;font-size:12px}.toast.show{opacity:1;transform:none}@media(max-width:1100px){.study-grid{grid-template-columns:1fr}.right-column{display:grid;grid-template-columns:1fr 1fr}.tip-panel{grid-column:1/-1}}@media(max-width:820px){.sidebar{transform:translateX(-100%);transition:.25s}.sidebar.open{transform:none}.workspace{margin-left:0}.page{padding:20px 15px}.global-search{display:none}.page-title-row{align-items:flex-start;gap:15px}.study-grid{display:block}.right-column{display:grid;margin-top:18px}.chat{max-height:none;height:58vh}.title-actions .score-chip{display:none}}@media(max-width:560px){.page-title-row{display:block}.title-actions{margin-top:13px}.right-column{grid-template-columns:1fr}.starter-grid{grid-template-columns:1fr}.message{max-width:96%}.visual-note em{display:none}.topbar{padding:0 13px}.page{padding:16px 10px}.tutor-panel{min-height:auto}.chat{padding:16px}.page-title-row h1{font-size:23px}}

/* Visual Learning Engine */
[hidden]{display:none!important}
.visual-plan{display:flex;gap:13px;align-items:flex-start;padding:15px 16px;border:1px dashed var(--purple);border-radius:13px;background:color-mix(in srgb,var(--purple) 7%,var(--panel));max-width:760px}
.visual-plan>i{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--purple);color:#fff;flex:0 0 auto}
.visual-plan div{display:flex;flex-direction:column;gap:4px}.visual-plan b{font-size:.94rem}.visual-plan span{font-size:.84rem;color:var(--muted);line-height:1.45}
.generate-visual{align-self:flex-start;margin-top:7px;border:0;border-radius:9px;padding:9px 12px;background:var(--purple);color:#fff;font-weight:700;cursor:pointer}.generate-visual:disabled{opacity:.7;cursor:wait}
.learning-asset{margin:0;max-width:760px;border:1px solid var(--line);border-radius:15px;overflow:hidden;background:var(--panel);box-shadow:0 8px 26px rgba(35,29,72,.08)}
.asset-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:11px 13px;border-bottom:1px solid var(--line)}.asset-toolbar>div:first-child{display:flex;flex-direction:column;gap:2px}.asset-toolbar span{text-transform:uppercase;font-size:.65rem;letter-spacing:.09em;color:var(--purple);font-weight:800}.asset-toolbar strong{font-size:.9rem}.asset-toolbar>div:last-child{display:flex;gap:6px}
.asset-tool{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--text);text-decoration:none;cursor:pointer}
.asset-canvas{display:block;width:100%;padding:0;border:0;background:#f5f6fa;cursor:zoom-in}.asset-canvas{overflow:auto}.asset-canvas img{display:block;width:100%;height:auto;max-height:none;object-fit:contain;object-position:center;background:#fff}.learning-asset figcaption{padding:10px 13px 4px;color:var(--muted);font-size:.82rem;line-height:1.45}.asset-cache{display:block;padding:4px 13px 11px;color:#1b8f6a;font-weight:600}
.asset-viewer{position:fixed;inset:0;z-index:3000;display:none;place-items:center;padding:28px;background:rgba(8,8,18,.88);backdrop-filter:blur(8px)}.asset-viewer.open{display:grid}.viewer-stage{max-width:min(1200px,92vw);max-height:84vh;overflow:auto;border-radius:14px;background:#fff}.viewer-stage img{display:block;max-width:100%;height:auto;transform-origin:center}.viewer-close{position:fixed;right:24px;top:20px;width:44px;height:44px;border:0;border-radius:50%;background:#fff;color:#222;font-size:1.1rem;cursor:pointer}.viewer-caption{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);padding:8px 14px;border-radius:99px;background:rgba(0,0,0,.62);color:#fff;font-weight:600}
@media(max-width:700px){.asset-toolbar{align-items:flex-start}.learning-asset,.visual-plan{max-width:100%}.asset-viewer{padding:14px}.viewer-close{right:12px;top:12px}}


/* Learning Decision Engine */
.teaching-decision{margin:10px 0 2px;border:1px solid var(--border,#e5e1ef);border-radius:10px;background:var(--surface-soft,#faf9fd);overflow:hidden}
.teaching-decision summary{cursor:pointer;list-style:none;padding:10px 12px;font-size:.78rem;font-weight:700;color:var(--muted,#77718a);display:flex;align-items:center;gap:8px}
.teaching-decision summary::-webkit-details-marker{display:none}
.teaching-decision summary i{color:#7258b5}.teaching-decision summary small{margin-left:auto;font-weight:500}
.decision-body{padding:0 12px 12px}.decision-body>b{display:block;margin-bottom:8px}
.decision-chips{display:flex;flex-wrap:wrap;gap:6px}.decision-chips span{font-size:.72rem;padding:5px 8px;border-radius:999px;background:rgba(111,82,176,.1);color:#654ba4;text-transform:capitalize}
.decision-body p{font-size:.76rem;line-height:1.45;margin:8px 0 0;color:var(--muted,#77718a)}
.future-asset{padding:8px;border-radius:8px;background:rgba(245,168,37,.09)}

.asset-key{padding:10px 13px 4px;border-top:1px solid var(--line)}.asset-key>strong{display:block;font-size:.76rem;margin-bottom:8px}.asset-key>strong i{color:var(--purple);margin-right:5px}.asset-key>div{display:flex;flex-wrap:wrap;gap:6px}.asset-key span{font-size:.72rem;padding:5px 8px;border:1px solid var(--line);border-radius:999px;background:var(--bg)}.asset-accuracy{display:flex;gap:8px;align-items:flex-start;margin:10px 13px;padding:9px 10px;border-radius:8px;background:rgba(39,199,186,.08);color:var(--muted);font-size:.72rem;line-height:1.45}.asset-accuracy i{color:var(--teal);margin-top:2px}

/* Verified Syllables terminology displayed outside generated imagery. */
.asset-key{margin:14px 16px 4px;padding:14px;border:1px solid var(--line);border-radius:12px;background:var(--soft)}
.asset-key>strong{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.asset-key>div{display:flex;flex-wrap:wrap;gap:8px}
.asset-key span{padding:6px 10px;border-radius:999px;background:var(--panel);border:1px solid var(--line);font-size:.82rem;font-weight:600}
.asset-accuracy{margin:12px 16px 16px;display:flex;align-items:flex-start;gap:9px;font-size:.8rem;color:var(--muted)}
.asset-accuracy i{margin-top:2px;color:var(--accent)}

/* Verified interactive curriculum overlays */
.interactive-visual{position:relative;background:#fff;overflow:hidden}
.interactive-visual .asset-canvas{position:relative;z-index:1}
.visual-pin{--pin-x:50%;--pin-y:50%;position:absolute;z-index:4;left:var(--pin-x);top:var(--pin-y);transform:translate(-50%,-50%);border:0;background:transparent;padding:0;cursor:pointer;color:#fff;filter:drop-shadow(0 2px 4px rgba(0,0,0,.28))}
.visual-pin>span{width:27px;height:27px;display:grid;place-items:center;border-radius:50%;background:var(--purple);border:2px solid #fff;font-size:.72rem;font-weight:800;transition:.18s}
.visual-pin>b{position:absolute;left:50%;bottom:calc(100% + 8px);transform:translateX(-50%) translateY(4px);white-space:nowrap;background:#252134;color:#fff;border-radius:6px;padding:6px 9px;font-size:.72rem;opacity:0;pointer-events:none;transition:.18s}
.visual-pin>b:after{content:'';position:absolute;left:50%;top:100%;transform:translateX(-50%);border:5px solid transparent;border-top-color:#252134}
.visual-pin:hover>span,.visual-pin:focus>span,.visual-pin.active>span{background:var(--teal);transform:scale(1.16)}
.visual-pin:hover>b,.visual-pin:focus>b,.visual-pin.active>b{opacity:1;transform:translateX(-50%) translateY(0)}
.term-chip{display:inline-flex!important;align-items:center;gap:6px;border:1px solid var(--line);border-radius:999px;background:var(--panel);color:var(--text);padding:6px 10px;cursor:default;font-size:.78rem;font-weight:600}
.term-chip.is-mapped{cursor:pointer}
.term-chip>span{width:19px;height:19px;display:grid;place-items:center;border-radius:50%;background:var(--line);font-size:.64rem}
.term-chip.is-mapped:hover,.term-chip.is-mapped.active{border-color:var(--purple);color:var(--purple);background:color-mix(in srgb,var(--purple) 8%,var(--panel))}
.term-chip.is-mapped.active>span{background:var(--purple);color:#fff}
.asset-key>small{display:block;margin-top:9px;color:var(--muted);font-size:.69rem;line-height:1.4}
@media(max-width:600px){.visual-pin>span{width:23px;height:23px;font-size:.65rem}.visual-pin>b{font-size:.66rem}.term-chip{font-size:.72rem}}

/* Learner class profile */
.class-chip{display:inline-flex;align-items:center;gap:.5rem;min-height:40px;padding:.55rem .8rem;border:1px solid var(--border,#e5e1ef);border-radius:.55rem;background:var(--panel,#fff);color:var(--text,#3f3b49);font:inherit;cursor:pointer}.class-chip i{color:#6b55ae}.class-chip b{color:#6b55ae}.class-chip:hover{border-color:#8d78c7;box-shadow:0 4px 14px rgba(76,57,133,.1)}
.learner-modal{z-index:1200;background:rgba(24,18,43,.62);backdrop-filter:blur(5px)}
.learner-card{width:min(470px,calc(100vw - 32px));padding:2rem;text-align:left;border-radius:18px}
.learner-card .learner-icon{display:grid;place-items:center;width:58px;height:58px;margin:0 0 1rem;border-radius:16px;background:rgba(107,85,174,.12);color:#6b55ae;font-size:1.5rem}
.learner-card h2{margin:0 0 .45rem;font-size:1.55rem}.learner-card>p{margin:0 0 1.35rem;color:var(--muted,#8b8797);line-height:1.55}
.learner-card form{display:grid;gap:.75rem}.learner-card label{font-weight:700}.learner-card select{width:100%;min-height:50px;padding:0 .9rem;border:1px solid var(--border,#ded9e9);border-radius:10px;background:var(--panel,#fff);color:var(--text,#3f3b49);font:inherit;outline:none}.learner-card select:focus{border-color:#7560b5;box-shadow:0 0 0 3px rgba(117,96,181,.14)}.learner-card form small{color:var(--muted,#8b8797);margin-bottom:.4rem}
@media(max-width:720px){.class-chip{padding:.5rem}.class-chip>i{margin:0}.title-actions{flex-wrap:wrap}.learner-card{padding:1.35rem}}

/* Tutor-focused layout: optional study tools live in modals. */
.tutor-only-grid{display:block}
.tutor-only-grid .tutor-panel{width:100%;min-height:calc(100vh - 225px)}
.tutor-only-grid .chat{min-height:560px;max-height:calc(100vh - 350px)}
.tool-modal-card{width:min(760px,100%)}
.quick-study-modal-list{display:grid;grid-template-columns:1fr 1fr;padding:14px}
.quick-study-modal-list button{border:1px solid var(--line);border-radius:6px;margin:6px;min-height:82px}
.quick-study-modal-list button:last-child{border-bottom:1px solid var(--line)}
.modal-study-tip{display:flex;gap:13px;margin:0 20px 20px;padding:16px;border-radius:6px;background:var(--bg);border:1px solid var(--line)}
.modal-study-tip>i{color:#ffaf26;font-size:21px}
.modal-study-tip strong{font-size:13px}
.modal-study-tip p{margin:5px 0 0;color:var(--muted);font-size:11px;line-height:1.6}
.progress-modal-card{width:min(520px,100%)}
.progress-modal-body{text-align:center;padding:26px 30px 30px}
.progress-modal-body .progress-ring{--progress:0%;width:145px;height:145px;margin:4px auto 18px;background:conic-gradient(var(--purple) 0 var(--progress),var(--line) var(--progress) 100%)}
.progress-modal-body .progress-ring:before{inset:11px}
.progress-modal-body .progress-ring span{font-size:22px}
.progress-modal-body>strong{display:block;font-size:20px;margin-bottom:7px}
.progress-modal-body>p{color:var(--muted);font-size:12px;margin:0 0 22px}
.progress-modal-body .btn{max-width:310px}
@media(max-width:820px){.tutor-only-grid .tutor-panel{min-height:auto}.tutor-only-grid .chat{height:64vh;min-height:420px;max-height:none}}
@media(max-width:560px){.quick-study-modal-list{grid-template-columns:1fr;padding:10px}.quick-study-modal-list button{margin:5px}.tool-modal{padding:10px}}

/* Verified lesson term alignment correction */
.asset-key > div {
  align-items: center;
}

.asset-key .term-chip {
  display: inline-flex !important;
  align-items: center;
  justify-content: flex-start;
  gap: 9px;
  min-height: 38px;
  padding: 6px 13px 6px 7px;
  line-height: 1;
  vertical-align: middle;
}

.asset-key .term-chip > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  box-sizing: border-box;
  line-height: 1;
  font-size: .72rem;
  font-weight: 800;
  text-align: center;
}

@media (max-width: 600px) {
  .asset-key .term-chip {
    min-height: 36px;
    padding: 5px 11px 5px 6px;
    gap: 8px;
  }

  .asset-key .term-chip > span {
    flex-basis: 24px;
    width: 24px;
    height: 24px;
    font-size: .68rem;
  }
}

/* Composer processing state */
.composer{transition:border-color .2s ease,box-shadow .2s ease,background .2s ease}
.composer.is-processing{border-color:color-mix(in srgb,var(--purple) 42%,var(--line));background:color-mix(in srgb,var(--purple) 5%,var(--bg));box-shadow:0 0 0 3px color-mix(in srgb,var(--purple) 9%,transparent)}
.composer textarea:disabled{cursor:wait;color:var(--muted);opacity:.82;-webkit-text-fill-color:var(--muted)}
.composer textarea:disabled::placeholder{color:var(--muted);opacity:1}
.composer #sendBtn{display:grid;place-items:center;transition:background .18s ease,opacity .18s ease,transform .18s ease}
.composer #sendBtn[aria-busy="true"]{opacity:1;cursor:wait;background:linear-gradient(135deg,var(--purple),var(--purple-3))}
.composer #sendBtn[aria-busy="true"] i{font-size:1rem}
.composer #sendBtn:disabled{opacity:1}


/* Progressive tutor response */
.message.assistant .bubble.is-streaming {
  min-height: 2.4rem;
}
.stream-caret {
  display: inline-block;
  width: 0.12rem;
  height: 1.05em;
  margin-left: 0.18rem;
  vertical-align: -0.14em;
  border-radius: 999px;
  background: currentColor;
  animation: tutor-caret-blink 0.8s steps(1, end) infinite;
}
@keyframes tutor-caret-blink {
  0%, 48% { opacity: 1; }
  49%, 100% { opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .stream-caret { animation: none; }
}

/* Natural tutor typing rhythm */
.message.assistant .bubble.is-thinking {
  display: flex;
  align-items: center;
  min-height: 2.65rem;
}
.tutor-thinking {
  display: inline-flex;
  align-items: center;
  gap: .28rem;
  color: var(--muted);
  font-size: .86rem;
  font-weight: 600;
}
.tutor-thinking i {
  width: .34rem;
  height: .34rem;
  border-radius: 50%;
  background: var(--purple);
  opacity: .28;
  animation: syllables-thinking-dot 1.15s ease-in-out infinite;
}
.tutor-thinking i:nth-of-type(2) { animation-delay: .16s; }
.tutor-thinking i:nth-of-type(3) { animation-delay: .32s; }
.stream-caret-finishing {
  animation-duration: .52s;
}
@keyframes syllables-thinking-dot {
  0%, 60%, 100% { opacity: .25; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}
@media (prefers-reduced-motion: reduce) {
  .tutor-thinking i { animation: none; opacity: .65; }
}

/* Interactive verified-term learning card */
.learning-asset{position:relative}
.visual-learning-card{position:absolute;z-index:18;right:18px;top:76px;width:min(340px,calc(100% - 36px));padding:18px;border:1px solid color-mix(in srgb,var(--purple) 22%,var(--line));border-radius:14px;background:color-mix(in srgb,var(--panel) 96%,transparent);box-shadow:0 18px 46px rgba(39,29,70,.2);backdrop-filter:blur(14px);opacity:0;transform:translateY(8px) scale(.985);transition:opacity .2s ease,transform .2s ease;color:var(--text)}
.visual-learning-card.open{opacity:1;transform:translateY(0) scale(1)}
.learning-card-close{position:absolute;right:10px;top:10px;width:30px;height:30px;display:grid;place-items:center;border:0;border-radius:50%;background:var(--bg);color:var(--muted);cursor:pointer}
.learning-card-kicker{display:flex;align-items:center;gap:7px;margin-right:34px;color:var(--purple);font-size:.7rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.visual-learning-card h4{margin:9px 34px 7px 0;font-size:1.15rem;line-height:1.2}
.visual-learning-card>p{margin:0 0 12px;color:var(--muted);font-size:.84rem;line-height:1.55}
.learning-card-function{display:grid;gap:4px;padding:11px 12px;border-radius:10px;background:color-mix(in srgb,var(--purple) 7%,var(--bg));font-size:.8rem;line-height:1.45}
.learning-card-function b{color:var(--purple);font-size:.7rem;text-transform:uppercase;letter-spacing:.04em}
.learning-card-tip{display:flex;align-items:flex-start;gap:8px;margin-top:10px;padding:9px 10px;border-radius:9px;background:rgba(255,175,38,.09);font-size:.76rem;line-height:1.45;color:var(--muted)}
.learning-card-tip i{color:#ffaf26;margin-top:2px}
.learning-card-actions{display:flex;flex-wrap:wrap;gap:7px;margin-top:13px}
.learning-card-actions button{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:7px 9px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--text);font:inherit;font-size:.72rem;font-weight:700;cursor:pointer}
.learning-card-actions button:hover{border-color:var(--purple);color:var(--purple);background:color-mix(in srgb,var(--purple) 7%,var(--panel))}
@media(max-width:700px){.visual-learning-card{position:fixed;left:12px;right:12px;top:auto;bottom:12px;width:auto;max-height:70vh;overflow:auto;z-index:3200}}