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var(--spacing-md);background:#dc354533;color:#f87171;font-size:var(--font-size-sm);font-weight:500}.code-block--error pre{background:transparent}.code-block--error code{color:#fca5a5}.inline-code{background:var(--color-bg-tertiary);padding:2px 6px;border-radius:var(--radius-sm);font-family:Consolas,Monaco,Courier New,monospace;font-size:.85em;color:var(--color-primary-brand)}.viewer-page{height:100vh;max-height:100vh;display:flex;flex-direction:column;background:var(--color-bg-secondary);overflow:hidden;box-sizing:border-box}.viewer-loading{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-md)}.spinner{width:40px;height:40px;border:3px solid var(--color-bg-tertiary);border-top-color:var(--color-primary-brand);border-radius:50%;animation:spin 1s linear infinite}.viewer-toolbar{display:flex;align-items:center;justify-content:space-between;height:40px;padding:0 .75rem;background:#fff;border-bottom:1px solid #E5E7EB;box-shadow:0 1px 2px #0000000a;flex-shrink:0}.toolbar-left{display:flex;align-items:center;gap:1rem}.toolbar-logo{display:flex;align-items:center;gap:.5rem;font-weight:600;color:var(--color-text-primary);text-decoration:none}.toolbar-logo .logo-icon{font-size:1.25rem}.toolbar-divider{width:1px;height:24px;background:#e5e7eb}.module-title{font-size:.9rem;color:#6b7280;max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.toolbar-center{display:flex;align-items:center;gap:.5rem;flex:1;justify-content:center;min-width:0}.nav-btn{width:22px!important;height:22px!important;min-width:22px;min-height:22px;padding:0;display:flex;align-items:center;justify-content:center;background:#f3f4f6;border:1px solid #D1D5DB;border-radius:4px;color:#374151;font-size:.7rem;font-weight:600;cursor:pointer;transition:all .15s ease;flex:0 0 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svg{width:15px;height:15px;stroke-width:2}.toolbar-btn:hover{color:#1e293b}.toolbar-btn.active{color:var(--color-accent, #46a5a5)}.tts-controls{display:flex;align-items:center;gap:.5rem;padding:0 .5rem;margin-left:.5rem}.tts-btn{width:26px;height:26px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;border-radius:5px;cursor:pointer;transition:color .2s ease;color:#64748b}.tts-btn svg{width:15px;height:15px;stroke-width:2}.tts-btn:hover{color:var(--color-accent, #46a5a5)}.tts-btn.playing{color:#ef4444;animation:pulse-playing 1.5s ease-in-out infinite}.tts-btn.paused{color:#f59e0b}@keyframes pulse-playing{0%,to{opacity:1}50%{opacity:.6}}.viewer-body{display:flex;flex:1;overflow:hidden;min-height:0}.viewer-nav{width:260px;background:#fff;border-right:1px solid #E5E7EB;display:flex;flex-direction:column;flex-shrink:0;overflow:hidden;min-height:0}.nav-title{padding:1rem 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.nav-item-title{color:#0369a1;font-weight:600}.viewer-breadcrumbs{display:flex;align-items:center;gap:6px;margin-left:var(--spacing-md);font-size:.85rem;color:#fff9}.breadcrumb-item{color:#fffc;text-decoration:none}.breadcrumb-item:hover{color:#fff;text-decoration:underline}.breadcrumb-separator{color:#fff6;font-size:10px}.breadcrumb-current{color:#fff;font-weight:500}.ai-suggestions button{padding:6px 12px;background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:.85rem;color:var(--color-primary-brand);font-weight:500;cursor:pointer;transition:all var(--transition-fast);box-shadow:var(--shadow-sm)}.ai-suggestions 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#00000014;transform:translateY(-4px)}.module-visual{position:relative;height:96px;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(135deg,#8b8b8b,#6e6e6e)}.module-visual.visual-0,.module-visual.visual-1,.module-visual.visual-2,.module-visual.visual-3{background:linear-gradient(135deg,#8b8b8b,#6e6e6e)}.module-visual.visual-0{background:linear-gradient(135deg,#46a5a5,#5cb8b8)}.module-visual.visual-1{background:linear-gradient(135deg,#2c3e3e,#3d5454)}.module-visual.visual-2{background:linear-gradient(135deg,#6b7280,#9ca3af)}.module-visual.visual-3{background:linear-gradient(135deg,#3b8a8a,#46a5a5)}.visual-icon-wrapper{width:56px;height:56px;display:flex;align-items:center;justify-content:center;background:#fff3;border-radius:50%;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.visual-icon{color:#fff}.module-sequence{position:absolute;top:.75rem;left:.75rem;padding:.25rem 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