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var(--clr-input-border);border-radius:8px;color:var(--clr-font-main);font-size:var(--fs-e);font-weight:600;cursor:pointer;transition:all .3s ease;font-family:inherit}.new-lesson-btn:hover{background:#ff63474d;transform:translateY(-2px)}.lesson-meta{display:flex;gap:1.5rem;flex-wrap:wrap}.meta-item{display:flex;align-items:center;gap:.5rem;font-size:var(--fs-e);color:var(--clr-font-secondary)}.meta-item svg{color:var(--clr-font-main)}.progress-container{margin-top:1.5rem}.progress-bar{width:100%;height:6px;background:#ffffff1a;border-radius:3px;overflow:hidden;margin-bottom:.5rem}.progress-fill{height:100%;background:linear-gradient(90deg,var(--clr-font-main),#ff6b6b);border-radius:3px;transition:width .3s ease}.progress-label{font-size:var(--fs-f);color:var(--clr-font-secondary);text-align:center}.animation-display{padding:1.5rem;border-radius:16px;position:relative}.time-display{position:absolute;top:2rem;right:2rem;padding:.5rem 1rem;background:#00000080;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:8px;font-size:var(--fs-f);color:var(--clr-font-secondary);font-weight:600}.controls-section{padding:2rem;border-radius:16px;display:flex;justify-content:center;align-items:center;gap:1.5rem}.control-btn{width:56px;height:56px;border-radius:50%;background:#ff634733;border:1px solid var(--clr-input-border);color:var(--clr-font-main);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s ease}.control-btn:hover:not(:disabled){background:#ff63474d;transform:scale(1.1)}.control-btn:disabled{opacity:.3;cursor:not-allowed}.play-pause-btn{width:72px;height:72px;border-radius:50%;background:var(--clr-button-bg);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s ease;box-shadow:0 4px 20px #ff634766}.play-pause-btn:hover{transform:scale(1.1);box-shadow:0 6px 25px #ff634780}.play-pause-btn:active{transform:scale(1.05)}.transcript-section{padding:1.5rem;border-radius:16px}.transcript-toggle{width:100%;display:flex;align-items:center;gap:.75rem;padding:1rem;background:transparent;border:none;color:var(--clr-font-secondary);font-size:var(--fs-c);font-weight:600;cursor:pointer;transition:all .3s ease;font-family:inherit}.transcript-toggle:hover{color:var(--clr-font-main)}.transcript-toggle svg:first-child{color:var(--clr-font-main)}.transcript-toggle svg:last-child{margin-left:auto}.transcript-content{padding:1.5rem 1rem 0;animation:slideDown .3s ease}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.transcript-text{font-size:var(--fs-c);color:var(--clr-font-secondary);line-height:1.7;margin-bottom:1.5rem}.visualization-info{display:flex;gap:1rem;flex-wrap:wrap}.vis-badge,.confidence-badge{padding:.5rem 1rem;border-radius:8px;font-size:var(--fs-f);font-weight:600}.vis-badge{background:#ff634733;color:var(--clr-font-main)}.confidence-badge{background:#ffffff1a;color:var(--clr-font-secondary)}@media (max-width: 768px){.lesson-title{font-size:var(--fs-c)}.controls-section{gap:1rem}.control-btn{width:48px;height:48px}.play-pause-btn{width:64px;height:64px}}.loading-container{display:flex;justify-content:center;align-items:center;padding:4rem 1rem}.loading-content{max-width:500px;width:100%;padding:3rem 2rem;border-radius:16px;text-align:center}.spinner-wrapper{position:relative;width:80px;height:80px;margin:0 auto 2rem}.spinner{width:80px;height:80px;border:4px solid rgba(255,99,71,.2);border-top-color:var(--clr-font-main);border-radius:50%;animation:spin 1s linear infinite}.spinner-glow{position:absolute;top:0;left:0;width:80px;height:80px;border-radius:50%;background:radial-gradient(circle,rgba(255,99,71,.2),transparent);animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1);opacity:.5}50%{transform:scale(1.2);opacity:.8}}.loading-title{font-size:var(--fs-b);color:var(--clr-font-main);margin-bottom:.5rem}.loading-subtitle{font-size:var(--fs-c);color:var(--clr-font-secondary);margin-bottom:2rem}.loading-steps{display:flex;justify-content:center;gap:2rem}.step{display:flex;flex-direction:column;align-items:center;gap:.5rem;opacity:.4;transition:opacity .3s ease}.step.active{opacity:1}.step-icon{width:32px;height:32px;border-radius:50%;background:#ff634733;display:flex;align-items:center;justify-content:center;font-size:var(--fs-d);color:var(--clr-font-main)}.step span{font-size:var(--fs-f);color:var(--clr-font-secondary)}.vroom-page{background-color:var(--clr-bg-main);color:var(--clr-font-secondary);min-height:100vh;overflow-x:hidden;font-family:Inter,Poppins,system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased}.vroom-ambient{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}.vroom-orb{position:absolute;border-radius:50%;filter:blur(120px);opacity:.08;will-change:transform}.vroom-orb--1{width:500px;height:500px;background:tomato;top:-10%;right:-8%;animation:vroom-drift 20s ease-in-out infinite alternate}.vroom-orb--2{width:400px;height:400px;background:#ff9f6b;bottom:-5%;left:2%;animation:vroom-drift 24s ease-in-out infinite alternate-reverse}@keyframes vroom-drift{0%{transform:translate(0) scale(1)}to{transform:translate(-50px,35px) scale(1.06)}}@keyframes vroom-fade-up{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.vroom-portal{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - 70px);padding:2rem 1.5rem;text-align:center}.vroom-portal-title{font-family:Inter,system-ui,sans-serif;font-size:clamp(2.4rem,5vw,3.8rem);font-weight:800;line-height:1.1;letter-spacing:-.03em;color:#fff;margin-bottom:1rem;opacity:0;animation:vroom-fade-up .8s .2s cubic-bezier(.23,1,.32,1) forwards}.vroom-portal-title span{background:linear-gradient(135deg,tomato,#ff9f6b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.vroom-portal-sub{font-size:1.1rem;line-height:1.6;color:#ffffff80;max-width:500px;margin-bottom:2.5rem;opacity:0;animation:vroom-fade-up .8s .4s cubic-bezier(.23,1,.32,1) forwards}.vroom-input-wrapper{position:relative;width:100%;max-width:560px;opacity:0;animation:vroom-fade-up .8s .6s cubic-bezier(.23,1,.32,1) forwards}.vroom-input{width:100%;padding:1.1rem 5rem 1.1rem 1.5rem;font-family:inherit;font-size:1.05rem;font-weight:500;color:#fff;background:#ffffff0a;border:1px solid rgba(255,255,255,.08);border-radius:18px;outline:none;transition:border-color .3s ease,background .3s ease,box-shadow .3s ease}.vroom-input::placeholder{color:#ffffff4d}.vroom-input:focus{border-color:#ff634780;background:#ffffff0f;box-shadow:0 0 0 3px #ff63471a}.vroom-submit-btn{position:absolute;right:6px;top:50%;transform:translateY(-50%);display:flex;align-items:center;justify-content:center;width:48px;height:48px;border:none;border-radius:14px;background:tomato;color:#fff;cursor:pointer;transition:all .25s cubic-bezier(.23,1,.32,1)}.vroom-submit-btn:hover{background:#e55539;transform:translateY(-50%) scale(1.05);box-shadow:0 4px 16px #ff634759}.vroom-submit-btn:disabled{opacity:.4;cursor:not-allowed;transform:translateY(-50%)}.vroom-suggestions{display:flex;flex-wrap:wrap;gap:.6rem;justify-content:center;margin-top:1.5rem;opacity:0;animation:vroom-fade-up .8s .8s cubic-bezier(.23,1,.32,1) forwards}.vroom-suggestion{padding:.5rem 1rem;font-family:inherit;font-size:.82rem;font-weight:500;color:#ffffff80;background:#ffffff08;border:1px solid rgba(255,255,255,.06);border-radius:12px;cursor:pointer;transition:all .25s ease}.vroom-suggestion:hover{color:#fff;border-color:#ff63474d;background:#ff634714}.vroom-loading{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - 70px);gap:2rem}.vroom-loading-spinner{width:56px;height:56px;border-radius:50%;border:3px solid rgba(255,255,255,.06);border-top-color:tomato;animation:vroom-spin .9s linear infinite}@keyframes vroom-spin{to{transform:rotate(360deg)}}.vroom-loading-text{font-size:1.1rem;font-weight:600;color:#fff9;animation:vroom-pulse 2s ease-in-out infinite}.vroom-loading-sub{font-size:.88rem;color:#ffffff4d;margin-top:-1rem}@keyframes vroom-pulse{0%,to{opacity:.6}50%{opacity:1}}.erp{position:relative;z-index:1;display:flex;flex-direction:column;height:calc(100vh - 70px);overflow:hidden}.erp-titlebar{display:flex;align-items:center;gap:1rem;padding:.75rem 1.5rem;border-bottom:1px solid rgba(255,255,255,.06);flex-shrink:0}.erp-back-btn{display:flex;align-items:center;gap:.35rem;padding:.4rem .8rem;font-family:inherit;font-size:.8rem;font-weight:500;color:#ffffff80;background:#ffffff0a;border:1px solid rgba(255,255,255,.06);border-radius:10px;cursor:pointer;transition:all .2s ease;flex-shrink:0}.erp-back-btn:hover{color:#fff;border-color:#ff63474d}.erp-title{font-family:Inter,system-ui,sans-serif;font-size:1rem;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.erp-split{display:flex;flex:1;overflow:hidden}.erp-canvas{flex:1;display:flex;align-items:center;justify-content:center;background:#0a0a0f;position:relative;border-right:1px solid rgba(255,255,255,.06);min-width:0}.erp-iframe{width:100%;height:100%;border:none;background:#0a0a0f}.erp-fullscreen-btn{position:absolute;bottom:1rem;right:1rem;width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:#0009;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1);border-radius:10px;color:#ffffff80;cursor:pointer;transition:all .2s ease;z-index:2}.erp-fullscreen-btn:hover{color:#fff;border-color:#ff634766}.erp-transcript-pane{width:360px;flex-shrink:0;display:flex;flex-direction:column;overflow:hidden}.erp-transcript-header{padding:1rem 1.25rem;border-bottom:1px solid rgba(255,255,255,.06);flex-shrink:0}.erp-transcript-title-text{font-family:Inter,system-ui,sans-serif;font-size:1rem;font-weight:700;color:#fff;margin-bottom:.15rem}.erp-share-btn{display:inline-flex;align-items:center;gap:.3rem;font-family:inherit;font-size:.75rem;font-weight:500;color:#ffffff59;background:none;border:none;cursor:pointer;transition:color .2s;padding:0}.erp-share-btn:hover{color:#ffffffb3}.erp-transcript-body{flex:1;overflow-y:auto;padding:1.25rem}.erp-transcript-body::-webkit-scrollbar{width:3px}.erp-transcript-body::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:2px}.erp-transcript-segment{padding:.85rem 1rem;border-radius:12px;margin-bottom:.5rem;font-size:.92rem;line-height:1.7;color:#fff6;cursor:pointer;transition:all .3s cubic-bezier(.23,1,.32,1)}.erp-transcript-segment:hover{color:#fff9;background:#ffffff05}.erp-transcript-segment.active{color:#ffffffd9;background:#ff63470f;border-left:3px solid #ff6347}.erp-transcript-segment.past{color:#ffffff80}.erp-controls{flex-shrink:0;border-top:1px solid rgba(255,255,255,.06);padding:.75rem 1.5rem;display:flex;flex-direction:column;gap:.5rem;background:#0a0a0fcc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.erp-timeline{display:flex;align-items:center;gap:.75rem}.erp-time-label{font-size:.72rem;font-weight:600;color:#ffffff59;min-width:32px;font-variant-numeric:tabular-nums}.erp-scrubber-track{flex:1;height:4px;background:#ffffff0f;border-radius:2px;cursor:pointer;position:relative}.erp-scrubber-fill{height:100%;background:tomato;border-radius:2px;transition:width .3s ease;position:relative}.erp-scrubber-fill:after{content:"";position:absolute;right:-5px;top:50%;transform:translateY(-50%);width:10px;height:10px;border-radius:50%;background:tomato;border:2px solid #fff;box-shadow:0 0 8px #ff634766;opacity:0;transition:opacity .2s}.erp-scrubber-track:hover .erp-scrubber-fill:after{opacity:1}.erp-scrubber-dots{position:absolute;top:0;left:0;right:0;height:100%;pointer-events:none}.erp-scrubber-dot{position:absolute;top:50%;transform:translate(-50%,-50%);width:3px;height:3px;border-radius:50%;background:#fff3}.erp-controls-row{display:flex;align-items:center;justify-content:center;gap:1rem}.erp-ctrl-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;border-radius:50%;background:transparent;color:#ffffff80;cursor:pointer;transition:all .2s ease}.erp-ctrl-btn:hover{color:#fff;background:#ffffff0f}.erp-ctrl-btn:disabled{opacity:.25;cursor:not-allowed}.erp-play-btn{width:44px;height:44px;border-radius:50%;background:tomato;color:#fff;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .25s cubic-bezier(.23,1,.32,1);box-shadow:0 3px 16px #ff63474d}.erp-play-btn:hover{transform:scale(1.08);box-shadow:0 5px 20px #ff634766}.erp-play-btn:active{transform:scale(.96)}.erp-vol-btn{margin-left:auto}.vroom-error{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - 70px);text-align:center;gap:1.5rem}.vroom-error-icon{color:tomato}.vroom-error-title{font-size:1.3rem;font-weight:700;color:#fff}.vroom-error-msg{font-size:.95rem;color:#ffffff73;max-width:400px}.vroom-retry-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.75rem;background:tomato;color:#fff;font-family:inherit;font-size:.95rem;font-weight:600;border:none;border-radius:14px;cursor:pointer;transition:all .25s cubic-bezier(.23,1,.32,1)}.vroom-retry-btn:hover{background:#e55539;transform:scale(1.03);box-shadow:0 6px 24px #ff63474d}@media (max-width: 1024px){.erp-transcript-pane{width:300px}}@media (max-width: 768px){.erp-split{flex-direction:column}.erp-canvas{border-right:none;border-bottom:1px solid rgba(255,255,255,.06);height:50%;flex:none}.erp-transcript-pane{width:100%;flex:1}.vroom-portal-title{font-size:2rem}.vroom-input-wrapper{max-width:100%}}@media (max-width: 640px){.vroom-portal-title{font-size:1.7rem}.erp-titlebar,.erp-controls{padding:.5rem 1rem}}