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var(--ease-standard)}.categories-card:hover{box-shadow:var(--shadow-2);border-color:var(--border-strong);transform:translateY(-2px)}.categories-card-icon-panel{height:180px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center}.categories-card-icon-glyph{width:150px;height:150px;display:block}.categories-card-icon-panel--fallback{background-color:var(--bg-surface-muted);color:var(--color-primary-600)}.categories-card-body{padding:var(--space-4) var(--space-2) var(--space-2)}.categories-card-title{font-size:var(--font-size-h3);font-weight:var(--font-weight-semibold);color:var(--color-primary-900);margin-bottom:var(--space-1)}.categories-card-subtitle{font-size:var(--font-size-body);color:var(--text-secondary)}.breadcrumb-outer-container{width:100%;min-height:48px;background-color:var(--bg-page);display:flex;align-items:center;box-sizing:border-box;padding:var(--space-3) var(--space-7);font-family:var(--font-sans)}.breadcrumb-nav{display:flex;align-items:center;gap:var(--space-2);font-family:var(--font-sans);font-size:var(--font-size-body)}.breadcrumb-chevron{color:var(--text-muted);flex:0 0 auto}.breadcrumb-link{display:inline-flex;align-items:center;gap:var(--space-1);border:none;background:transparent;padding:0;cursor:pointer;font:inherit;font-family:var(--font-sans);color:var(--text-secondary);transition:color var(--duration-micro) var(--ease-standard)}.breadcrumb-link:hover{color:var(--color-primary-600)}.breadcrumb-current{color:var(--color-primary-900);font-weight:var(--font-weight-semibold)}.breadcrumb-back-button{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border:none;background:transparent;border-radius:var(--radius-md);color:var(--text-secondary);cursor:pointer;padding:0;transition:background var(--duration-micro) var(--ease-standard),color var(--duration-micro) var(--ease-standard)}.breadcrumb-back-button:hover{background:var(--bg-surface-muted);color:var(--color-primary-600)}.chapters-page-container{width:100%;background-color:var(--bg-page);box-sizing:border-box;font-family:var(--font-sans)}.chapters-page-content{max-width:1240px;margin:0 auto;box-sizing:border-box;padding:var(--space-6) var(--space-7) var(--space-10);display:flex;flex-direction:row;align-items:flex-start;gap:var(--space-7)}.chapters-sidebar{flex:0 0 260px;box-sizing:border-box}.chapters-sidebar-label{font-size:var(--font-size-overline);font-weight:var(--font-weight-semibold);letter-spacing:var(--letter-spacing-overline);text-transform:uppercase;color:var(--text-secondary);margin-bottom:var(--space-4);padding-left:var(--space-4)}.chapters-list{display:flex;flex-direction:column;gap:var(--space-1)}.chapters-list-item{padding:11px var(--space-4);border-left:3px solid transparent;border-radius:0 var(--radius-md) var(--radius-md) 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auto;color:var(--text-muted);transition:color var(--duration-micro) var(--ease-standard),transform var(--duration-micro) var(--ease-standard)}.chapters-lesson-row:hover .chapters-lesson-chevron{color:var(--color-primary-700);transform:translate(2px)}.chapters-tag-continue{background-color:var(--color-accent-400);color:var(--text-on-primary)}.chapters-lesson-row-continue{background-color:var(--color-accent-50);border-left-color:var(--color-accent-400)}.chapters-lesson-row-continue:hover{background-color:var(--color-accent-100)}.chapters-lesson-row-continue .chapters-lesson-num{color:var(--color-accent-800)}.chapters-lesson-row-continue .chapters-lesson-name{font-weight:var(--font-weight-semibold)}.chapters-lesson-row-locked{cursor:not-allowed}.chapters-lesson-row-locked 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rgba(255,255,255,.08);border-radius:var(--radius-lg);box-shadow:var(--sim-shadow-2);padding:var(--space-4);font-family:var(--font-sans);display:flex;flex-direction:column;gap:var(--space-3)}.sim-control-bar-time{display:flex;flex-direction:column;gap:var(--space-2)}.sim-control-bar-time-row{display:flex;flex-direction:row;align-items:center;justify-content:space-between}.sim-control-bar-label{font-size:var(--font-size-body-sm);color:var(--sim-text-secondary)}.sim-control-bar-value{font-family:var(--font-mono);font-size:var(--font-size-body-sm);font-weight:var(--font-weight-semibold);color:var(--sim-highlight)}.sim-control-bar-slider{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:4px;border-radius:var(--radius-full);background:var(--sim-elevation-2);outline:none;cursor:pointer}.sim-control-bar-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:14px;height:14px;border-radius:var(--radius-full);background:var(--sim-highlight);border:none;cursor:pointer}.sim-control-bar-slider::-moz-range-thumb{width:14px;height:14px;border-radius:var(--radius-full);background:var(--sim-highlight);border:none;cursor:pointer}.sim-control-bar-slider:disabled{opacity:.4;cursor:not-allowed}.sim-control-bar-play{-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer;border:none;width:100%;display:flex;align-items:center;justify-content:center;gap:var(--space-1);background-color:var(--color-primary-600);color:var(--text-on-primary);font-family:var(--font-sans);font-size:var(--font-size-body);font-weight:var(--font-weight-semibold);border-radius:var(--radius-md);padding:var(--space-2) 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rgba(255,255,255,.12);border-radius:var(--radius-md);background-color:#0f0f11b3;color:#f5f5f0;font-family:var(--font-sans);font-size:var(--font-size-body-sm);font-weight:var(--font-weight-medium);white-space:nowrap;transition:background-color var(--duration-micro) var(--ease-standard)}.canvas3d-advanced-toggle:hover{background-color:#1f1f24d9}.canvas3d-advanced-panel{position:absolute;top:calc(-1 * var(--space-4));left:100%;margin-left:var(--space-3);width:320px;max-height:70vh;overflow-y:auto;border-radius:var(--radius-lg);box-shadow:var(--sim-shadow-2)}.canvas3d-advanced-panel input[type=checkbox]:not(:checked)+label:not(:active){background-color:#373c4b}.canvas3d-advanced-panel div:has(>div[style*="left: 0"][style*="right:"]){background-color:#2c2c33}@keyframes sim-chip-glow{0%,to{box-shadow:0 0 #7de3f400,0 0 6px #7de3f426}50%{box-shadow:0 0 0 3px #7de3f424,0 0 22px #7de3f473}}.sim-chip-glow.sim-chip-glow{border-color:#7de3f473;animation:sim-chip-glow 2.8s ease-in-out 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var(--ease-standard)}.lesson-quiz-body{flex:1;min-height:0;overflow-y:auto;padding:var(--space-7);box-sizing:border-box}.lesson-quiz-meta{font-size:var(--font-size-body-sm);font-weight:var(--font-weight-medium);color:var(--text-secondary);margin-bottom:var(--space-3)}.lesson-quiz-prompt{font-size:var(--font-size-h4);font-weight:var(--font-weight-semibold);line-height:var(--line-height-heading);color:var(--text-primary);margin-bottom:var(--space-6)}.lesson-quiz-options{display:flex;flex-direction:column;gap:var(--space-3)}.lesson-quiz-option{display:flex;flex-direction:row;align-items:center;gap:var(--space-3);padding:var(--space-4) var(--space-5);border-radius:var(--radius-md);border:1px solid var(--border-default);background-color:var(--bg-surface);cursor:pointer;text-align:left;font-family:inherit;transition:background-color var(--duration-micro) var(--ease-standard),border-color var(--duration-micro) var(--ease-standard),opacity var(--duration-micro) var(--ease-standard)}.lesson-quiz-option:hover:not(.lesson-quiz-option-disabled){border-color:var(--border-strong);background-color:var(--bg-surface-muted)}.lesson-quiz-option-disabled{cursor:default}.lesson-quiz-option-selected{border-color:var(--color-primary-600);background-color:var(--color-primary-50)}.lesson-quiz-option-correct{border-color:var(--color-success);background-color:var(--color-success-bg)}.lesson-quiz-option-incorrect{border-color:var(--color-danger);background-color:var(--color-danger-bg)}.lesson-quiz-option-faded{opacity:.55}.lesson-quiz-option-text{flex:1;min-width:0;font-size:var(--font-size-body);line-height:var(--line-height-body);color:var(--text-primary)}.lesson-quiz-option-radio{flex:0 0 auto;width:18px;height:18px;border-radius:var(--radius-full);border:2px solid var(--border-strong);box-sizing:border-box;position:relative;transition:border-color var(--duration-micro) 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var(--border-default)}.lesson-quiz-summary{flex:1;min-height:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-4);padding:var(--space-8);text-align:center}.lesson-quiz-summary-badge{width:56px;height:56px;border-radius:var(--radius-full);background-color:var(--color-accent-50);color:var(--color-accent-400);display:flex;align-items:center;justify-content:center}.lesson-quiz-summary-title{font-size:var(--font-size-h3);font-weight:var(--font-weight-semibold);color:var(--text-primary)}.lesson-quiz-summary-subtitle{font-size:var(--font-size-body-sm);color:var(--text-secondary);margin-top:calc(-1 * var(--space-2))}.lesson-quiz-status{flex:1;min-height:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-3);color:var(--text-secondary);font-size:var(--font-size-body)}.lesson-quiz-status-spinner{width:22px;height:22px;animation:lesson-quiz-spin .9s linear infinite}@keyframes 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