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.bar-select select{text-overflow:ellipsis;width:100%;height:100%;color:var(--foreground);font-family:inherit;font-size:inherit;appearance:none;color-scheme:normal;background:0 0;border:0;padding:0 24px 0 27px;font-weight:500;line-height:1;position:absolute;inset:0;overflow:hidden}.lesson-controls .bar-select:after{content:"";pointer-events:none;border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);width:7px;height:7px;position:absolute;right:9px;transform:translateY(-1px)rotate(45deg)}.lesson-controls .bar-select select:focus-visible,.settings-row select:focus-visible{outline:none}.lesson-controls .bar-select:focus-within,.settings-row:focus-within{border-color:var(--accent)}.canvas-controls{transition:opacity var(--duration-ui) var(--ease-out);flex-direction:row;flex-shrink:0;align-items:center;gap:6px;display:flex}.canvas-controls.is-dimmed{opacity:.35}.canvas-controls.is-dimmed:hover,.canvas-controls.is-dimmed:focus-within{opacity:1}.canvas-icon-button{border:1px solid var(--line);background:var(--chrome);place-items:center;width:26px;height:26px;padding:0;display:grid}@supports (color:color-mix(in lab, red, red)){.canvas-icon-button{background:color-mix(in srgb, var(--chrome) 92%, transparent)}}.canvas-icon-button{color:var(--foreground);border-radius:999px}.canvas-icon-button.is-muted{color:var(--muted)}.canvas-icon-button.is-speed{font-variant-numeric:tabular-nums;letter-spacing:-.01em;width:auto;min-width:30px;padding:0 7px;font-size:.68rem;font-weight:600}.canvas-icon-button.is-playback,.canvas-icon-button.is-arrive{gap:4px;width:auto;min-width:26px;padding:0 10px 0 6px;font-size:.75rem;font-weight:600;display:inline-flex}.canvas-icon-button.is-arrive{color:#fff;background:var(--accent);border-color:var(--accent)}.canvas-icon-button.is-arrive:hover{background:var(--accent-deep);border-color:var(--accent-deep)}.canvas-icon-button.is-arrive.is-warming{color:var(--muted);background:var(--paper);border-color:var(--line);opacity:.85}.canvas-icon-button.is-arrive.is-warming:hover{background:var(--highlight);border-color:var(--line-strong);color:var(--foreground)}.transcript-trigger{flex-shrink:0}.transcript-dialog{inset:auto auto auto 50%;bottom:calc(24px + env(safe-area-inset-bottom,0px) + var(--kb-inset,0px));border:1px solid var(--line-strong);background:var(--chrome);width:min(560px,100vw - 24px);max-width:none;max-height:min(68dvh,560px);color:var(--foreground);box-shadow:0 24px 64px var(--ink);border-radius:20px;margin:0;padding:0;position:fixed;transform:translate(-50%)}@supports (color:color-mix(in lab, red, red)){.transcript-dialog{box-shadow:0 24px 64px color-mix(in srgb, var(--ink) 22%, transparent)}}.transcript-dialog[open]{flex-direction:column;display:flex}.transcript-dialog::backdrop{background:var(--ink)}@supports (color:color-mix(in lab, red, red)){.transcript-dialog::backdrop{background:color-mix(in srgb, var(--ink) 18%, transparent)}}.transcript-head{border-bottom:1px solid var(--line);flex-shrink:0;justify-content:space-between;align-items:center;gap:8px;padding:12px 12px 10px 16px;display:flex}.transcript-title{letter-spacing:-.01em;margin:0;font-size:.95rem}.transcript-close{width:28px;height:28px;color:var(--muted);transition:background-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);background:0 0;border:0;border-radius:8px;place-items:center;padding:0;display:grid}.transcript-close:hover,.transcript-close:focus-visible{background:var(--highlight);color:var(--foreground)}.transcript-body{gap:4px;margin:0;padding:10px 16px 16px;list-style:none;display:grid;overflow-y:auto}.transcript-line{border-left:2px solid #0000;border-radius:8px;padding:6px 8px 6px 10px}.transcript-line.is-active{border-left-color:var(--accent);background:var(--accent)}@supports (color:color-mix(in lab, red, red)){.transcript-line.is-active{background:color-mix(in srgb, var(--accent) 8%, transparent)}}.transcript-section{letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:2px;font-size:.7rem;font-weight:650;display:block}.transcript-text{margin:0;font-size:.9rem;line-height:1.5}.transcript-empty{color:var(--muted);margin:0;padding:14px 16px 18px;font-size:.9rem}.settings-menu{position:relative}.settings-panel{z-index:1;border:1px solid var(--line);background:var(--chrome);gap:6px;width:min(280px,100vw - 32px);padding:10px;display:grid;position:absolute;top:calc(100% + 8px);right:0}@supports (color:color-mix(in lab, red, red)){.settings-panel{background:color-mix(in srgb, var(--chrome) 96%, var(--paper))}}.settings-panel{box-shadow:0 12px 32px var(--ink);border-radius:16px}@supports (color:color-mix(in lab, red, red)){.settings-panel{box-shadow:0 12px 32px color-mix(in srgb, var(--ink) 12%, transparent)}}.settings-panel{animation:settings-in var(--duration-ui) var(--ease-out)}@keyframes settings-in{0%{opacity:0;transform:translateY(6px)scale(.98)}to{opacity:1;transform:none}}.settings-row{border:1px solid var(--line);background:var(--paper);min-width:0;min-height:34px;color:var(--foreground);border-radius:10px;align-items:center;gap:8px;padding:0 0 0 10px;font-size:.78rem;font-weight:500;line-height:1;display:flex;position:relative;overflow:hidden}.settings-row svg{color:var(--muted);flex-shrink:0}.settings-row-kind{width:4.6em;color:var(--muted);flex-shrink:0}.settings-row select{width:100%;min-width:0;max-width:100%;height:32px;color:var(--foreground);font-family:inherit;font-size:inherit;text-overflow:ellipsis;appearance:none;color-scheme:normal;background:0 0;border:0;flex:1 1 0;margin-right:-22px;padding:0 22px 0 0;font-weight:500;line-height:1;overflow:hidden}.settings-row:after{content:"";pointer-events:none;border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);width:7px;height:7px;position:absolute;right:9px;transform:translateY(-1px)rotate(45deg)}.lesson-progress{text-align:center;opacity:0;pointer-events:none;min-width:0;transition:opacity var(--duration-ui) var(--ease-out)}.lesson-progress.is-visible{opacity:1;pointer-events:auto}.lesson-progress-toast{background:var(--chrome);border-width:0;border-radius:999px;align-items:center;gap:10px;max-width:0;padding:0;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.lesson-progress-toast{background:color-mix(in srgb, var(--chrome) 96%, transparent)}}.lesson-progress-toast{color:var(--foreground);white-space:nowrap;opacity:0;visibility:hidden;pointer-events:none;transition:opacity var(--duration-ui) var(--ease-out), visibility 0s linear var(--duration-ui), max-width var(--duration-ui) var(--ease-out), padding var(--duration-ui) var(--ease-out), border-width var(--duration-ui) var(--ease-out);border-style:solid;font-size:.8rem;font-weight:600;overflow:hidden;box-shadow:0 10px 30px #1c19151f}.lesson-progress-toast.is-visible{opacity:1;visibility:visible;max-width:100%;transition:opacity var(--duration-ui) var(--ease-out), visibility 0s linear 0s, max-width var(--duration-ui) var(--ease-out), padding var(--duration-ui) var(--ease-out), border-width var(--duration-ui) var(--ease-out);border-width:1px;padding:4px 10px}.lesson-progress-toast-title{text-overflow:ellipsis;white-space:nowrap;flex:0 auto;min-width:0;overflow:hidden}.lesson-progress-toast-meta{color:var(--muted);flex-shrink:0;font-size:.72rem;font-weight:500}@media (max-width:767px){.lesson-progress-toast-time{display:none}}@media (max-width:639px){.lesson-progress-toast{top:calc(var(--topbar-height) + 46px);max-width:calc(100vw - 24px);padding:5px 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var(--kb-inset,0px));z-index:12;background:var(--chrome);width:min(560px,100% - 32px);position:absolute;transform:translate(-50%)translateY(14px)}@supports (color:color-mix(in lab, red, red)){.check-card,.aside-card,.tutor-error{background:color-mix(in srgb, var(--chrome) 96%, transparent)}}.check-card,.aside-card,.tutor-error{border:1px solid var(--line);opacity:0;pointer-events:none;transition:opacity var(--duration-ui) var(--ease-out), transform var(--duration-ui) var(--ease-out), background-color var(--duration-ui) var(--ease-in-out), border-color var(--duration-ui) var(--ease-in-out), color var(--duration-ui) var(--ease-in-out);border-radius:20px;padding:14px 16px}.tutor-error{grid-template-columns:1fr auto;align-items:center;gap:4px 12px;display:grid}.tutor-error-copy{grid-column:1;min-width:0}.tutor-error-message{margin:0;font-size:.9rem;line-height:1.4}.tutor-error-guidance{color:var(--muted);margin:2px 0 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140px);overflow-y:auto}.aside-card{max-height:calc(100% - 140px)}.check-card.is-visible,.aside-card.is-visible,.tutor-error.is-visible{opacity:1;pointer-events:auto;transform:translate(-50%)translateY(0)}:where(dialog).check-card,:where(dialog).aside-card{inset:0;bottom:var(--kb-inset,0px);max-height:calc(100dvh - var(--kb-inset,0px) - 40px);z-index:14;color:var(--foreground);margin:auto;position:fixed;left:0;transform:translateY(14px)}:where(dialog).check-card.is-visible,:where(dialog).aside-card.is-visible{transform:translateY(0)}.tutor-shell:has(dialog.check-card[open]):after{content:"";z-index:13;pointer-events:none;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);position:fixed;inset:0}.tutor-shell:has(dialog.aside-card[open]):after{content:"";z-index:13;pointer-events:none;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);position:fixed;inset:0}:where(dialog).check-card::backdrop,:where(dialog).aside-card::backdrop{background:var(--ink)}@supports 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.whiteboard-svg{width:100%;max-width:100%;overflow:hidden}.aside-confirm{margin-top:12px}.check-eyebrow{letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 6px;font-size:.72rem;font-weight:650}.check-question{margin:0;font-size:1.02rem;font-weight:600;line-height:1.4}.check-options{flex-direction:column;gap:8px;margin-top:12px;display:flex}.check-card .check-option{text-align:left;border-radius:14px;width:100%;padding:10px 14px;line-height:1.35}.check-option.is-wrong{border-color:var(--danger)}@supports (color:color-mix(in lab, red, red)){.check-option.is-wrong{border-color:color-mix(in srgb, var(--danger) 55%, var(--line))}}.check-option.is-wrong{color:var(--danger);background:var(--danger)}@supports (color:color-mix(in lab, red, red)){.check-option.is-wrong{background:color-mix(in srgb, var(--danger) 8%, var(--chrome))}}.check-option.is-correct{border-color:var(--accent)}@supports (color:color-mix(in lab, red, red)){.check-option.is-correct{border-color:color-mix(in srgb, var(--accent) 55%, var(--line))}}.check-option.is-correct{color:var(--accent);background:var(--accent)}@supports (color:color-mix(in lab, red, red)){.check-option.is-correct{background:color-mix(in srgb, var(--accent) 10%, var(--chrome))}}.check-field{align-items:center;gap:8px;margin-top:12px;display:flex}.check-field input{border:1px solid var(--line-strong);background:var(--chrome);min-width:0;color:var(--foreground);border-radius:14px;flex:1;padding:10px 12px;font-size:.95rem}.check-feedback{margin:10px 0 0;font-size:.88rem;line-height:1.4}.check-feedback.is-ok{color:var(--accent)}.check-feedback.is-miss{color:var(--danger)}.check-feedback.is-hint{color:var(--accent-deep)}.score-ring{animation:score-ring-in var(--duration-layout) var(--ease-out) both;grid-template-rows:72px auto;grid-template-columns:72px;place-items:center;gap:4px;margin:6px auto 2px;display:grid}.score-ring-svg{grid-area:1/1;width:72px;height:72px}.score-ring-track{fill:none;stroke:var(--accent)}@supports (color:color-mix(in lab, red, red)){.score-ring-track{stroke:color-mix(in srgb, var(--accent) 16%, transparent)}}.score-ring-track{stroke-width:5px}.score-ring-value{fill:none;stroke:var(--accent);stroke-width:5px;stroke-linecap:round}.score-ring-score{font-family:var(--font-board-hand), var(--font-geist-sans), sans-serif;color:var(--ink);grid-area:1/1;font-size:1.4rem;font-weight:650;line-height:1}.score-ring-label{font-family:var(--font-board-hand), var(--font-geist-sans), sans-serif;color:var(--accent);grid-area:2/1;font-size:1.2rem;font-weight:600;line-height:1}@keyframes score-ring-in{0%{opacity:0;transform:scale(.86)}to{opacity:1;transform:scale(1)}}.check-card .check-hint{margin:10px 0 0}.check-escapes{flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px;display:flex}.check-escapes .check-escape-btn{color:var(--muted);border:1px solid var(--line);background:0 0;border-radius:999px;padding:6px 14px;font-size:.82rem;font-weight:500}@supports (color:color-mix(in lab, red, red)){.check-escapes .check-escape-btn{border:1px solid color-mix(in srgb, var(--line) 75%, transparent)}}.check-escapes .check-escape-btn{transition:color var(--duration-ui) var(--ease-out), border-color var(--duration-ui) var(--ease-out), background-color var(--duration-ui) var(--ease-out)}.check-escapes .check-escape-btn:hover{color:var(--foreground);border-color:var(--line);background:var(--line)}@supports (color:color-mix(in lab, red, red)){.check-escapes .check-escape-btn:hover{background:color-mix(in srgb, var(--line) 25%, transparent)}}.check-escapes .check-escape-btn:active{color:var(--foreground);background:var(--line)}@supports (color:color-mix(in lab, red, red)){.check-escapes .check-escape-btn:active{background:color-mix(in srgb, var(--line) 40%, transparent)}}.check-escapes .check-escape-btn:disabled{opacity:.5;cursor:not-allowed}.check-actions{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.check-actions .ghost{background:var(--chrome);color:var(--foreground)}.results-focus{margin-top:12px}.results-focus-label{color:var(--muted);margin:0;font-size:.8rem;font-weight:600}.results-focus-list{margin:6px 0 0;padding-left:18px;font-size:.9rem;line-height:1.5}.results-focus-list li+li{margin-top:2px}.quiz-review{flex-direction:column;gap:12px;max-height:320px;margin:12px 0 0;padding:0;list-style:none;display:flex;overflow-y:auto}.quiz-review-item{border:1px solid var(--line);background:var(--chrome);border-radius:14px;padding:10px 12px}@supports (color:color-mix(in lab, red, red)){.quiz-review-item{background:color-mix(in srgb, var(--chrome) 70%, transparent)}}.quiz-review-head{flex-direction:column;align-items:flex-start;gap:4px;display:flex}.quiz-review-status{letter-spacing:.04em;text-transform:uppercase;flex:none;font-size:.72rem;font-weight:650}.quiz-review-status.is-ok{color:var(--accent)}.quiz-review-status.is-miss{color:var(--danger)}.quiz-review-question{margin:0;font-size:.92rem;font-weight:600;line-height:1.4}.quiz-review-answer{color:var(--accent-deep);margin:6px 0 0;font-size:.86rem}.quiz-review-explanation{color:var(--muted);margin:4px 0 0;font-size:.84rem;line-height:1.4}.tutor-error{color:var(--danger);top:116px;bottom:auto;transform:translate(-50%)translateY(-10px)}.tutor-error.is-visible{transform:translate(-50%)translateY(0)}@property --status-pill-angle{syntax:"<angle>";inherits:false;initial-value:0deg}.status-pill:before,.chat-panel.is-recording:before{content:"";z-index:-1;border-radius:inherit;background:conic-gradient(from var(--status-pill-angle), var(--accent), #14b8a6, var(--chrome), #0d9488, 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16px;display:inline-flex;position:absolute}@supports (color:color-mix(in lab, red, red)){.status-pill{background:color-mix(in srgb, var(--chrome) 96%, transparent)}}.status-pill{color:var(--foreground);opacity:0;pointer-events:none;transition:opacity var(--duration-ui) var(--ease-out), transform var(--duration-ui) var(--ease-out);background-clip:padding-box;border:2px solid #0000;font-size:.83rem;font-weight:550;transform:translate(-50%)translateY(-8px);box-shadow:0 10px 30px #1c19151f}.status-pill.is-visible{opacity:1;transform:translate(-50%)translateY(0)}.status-pill.is-visible:before,.chat-panel.is-recording:before{animation:.9s linear infinite status-pill-ring-spin}@keyframes status-pill-ring-spin{to{--status-pill-angle:360deg}}.status-pill-text{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}@media (max-width:639px){.status-pill{top:calc(var(--topbar-height) + 8px);padding:6px 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