:root{--bg-color: #030712;--surface-color: #111827;--primary-color: #8b5cf6;--primary-hover: #7c3aed;--text-primary: #f8fafc;--text-secondary: #94a3b8;--accent-color: #06b6d4;--font-sans: "Inter", system-ui, Avenir, Helvetica, Arial, sans-serif;--wheel-height: 200px}body{margin:0;font-family:var(--font-sans);background-color:var(--bg-color);color:var(--text-primary);display:flex;justify-content:center;min-height:100vh;-webkit-font-smoothing:antialiased}#root{width:100%;max-width:800px;padding:2rem;box-sizing:border-box}.app-header h1{font-size:2.5rem;font-weight:800;text-align:center;margin-bottom:2rem;background:linear-gradient(to right,#8b5cf6,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.05em;filter:drop-shadow(0 0 2em rgba(139,92,246,.3))}.app-description{max-width:600px;margin:0 auto 2rem;text-align:center;color:var(--text-secondary);line-height:1.6;background:var(--surface-color);padding:1.5rem;border-radius:1rem;border:1px solid #1f2937;box-shadow:0 4px 6px -1px #00000080}.app-description strong{color:var(--primary-color)}.input-container{display:flex;flex-direction:column;gap:1.5rem}.input-textarea{width:100%;height:300px;padding:1.5rem;background-color:var(--surface-color);border:1px solid #1f2937;border-radius:1rem;color:var(--text-primary);font-size:1.1rem;resize:vertical;outline:none;transition:border-color .2s,box-shadow .2s;font-family:inherit}.input-textarea:focus{border-color:var(--primary-color);box-shadow:0 0 0 2px #8b5cf64d}.start-button{align-self:center;padding:1rem 3rem;font-size:1.25rem;font-weight:600;background:linear-gradient(135deg,var(--primary-color),var(--primary-hover));color:#fff;border:none;border-radius:9999px;cursor:pointer;transition:transform .1s,box-shadow .2s;box-shadow:0 0 20px #8b5cf666}.start-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 0 30px #8b5cf699}.start-button:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;background:var(--surface-color)}.reader-view{display:flex;flex-direction:column;height:60vh;justify-content:space-between}.reader-container{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;background-color:var(--surface-color);border-radius:1rem;position:relative;overflow:hidden;box-shadow:0 10px 25px -5px #0009,0 8px 10px -6px #0009;border:1px solid #1f2937}.word-wheel{display:flex;flex-direction:column;align-items:center;justify-content:center;height:var(--wheel-height);position:relative;perspective:1000px}.word-row{display:flex;align-items:center;justify-content:center;position:absolute;width:100%;transition:all .15s cubic-bezier(.4,0,.2,1);will-change:transform,opacity,filter}.current-row{top:50%;transform:translateY(-50%);z-index:10}.word-content.current{font-size:4rem;font-weight:700;color:var(--text-primary);text-shadow:0 0 30px rgba(139,92,246,.5),0 0 10px rgba(6,182,212,.3)}.prev-row{top:20%;transform:translateY(-50%);z-index:5}.word-content.prev{font-size:1.8rem;font-weight:500;color:var(--text-secondary);opacity:.3;filter:blur(2px)}.next-row{top:80%;transform:translateY(-50%);z-index:5}.word-content.next{font-size:1.8rem;font-weight:500;color:var(--text-secondary);opacity:.3;filter:blur(2px)}.guide-lines .line{position:absolute;left:50%;transform:translate(-50%);width:2px;height:20px;background-color:var(--accent-color);opacity:.5;z-index:20;box-shadow:0 0 10px var(--accent-color)}.guide-lines .top{top:1rem}.guide-lines .bottom{bottom:1rem}.controls-container{margin-top:2rem;display:flex;flex-direction:column;gap:1.5rem;background-color:var(--surface-color);padding:1.5rem;border-radius:1rem;border:1px solid #1f2937}.progress-control{width:100%}.progress-bar{width:100%;height:6px;background:#374151;border-radius:3px;outline:none;-webkit-appearance:none;appearance:none;cursor:pointer}.progress-bar::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;background:var(--accent-color);border-radius:50%;cursor:pointer;transition:transform .1s;box-shadow:0 0 10px var(--accent-color)}.progress-bar::-webkit-slider-thumb:hover{transform:scale(1.2)}.main-controls{display:flex;align-items:center;justify-content:space-between}.playback-group{display:flex;align-items:center;gap:1.5rem}.play-button{background:var(--primary-color);color:#fff;border:none;border-radius:50%;width:64px;height:64px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .1s,box-shadow .2s;box-shadow:0 0 20px #8b5cf666}.play-button:hover{background:var(--primary-hover);transform:scale(1.05);box-shadow:0 0 30px #8b5cf699}.icon-button{background:none;border:none;color:var(--text-secondary);cursor:pointer;transition:color .2s,transform .2s;padding:8px}.icon-button:hover{color:var(--text-primary);transform:scale(1.1)}.secondary-button{background:transparent;border:1px solid var(--text-secondary);color:var(--text-secondary);padding:.5rem 1rem;border-radius:8px;cursor:pointer;transition:all .2s}.secondary-button:hover{border-color:var(--primary-color);color:var(--primary-color);box-shadow:0 0 10px #8b5cf633}.speed-group{display:flex;flex-direction:column;align-items:flex-end;gap:.5rem}.speed-label{font-weight:600;color:var(--text-primary);font-variant-numeric:tabular-nums;min-width:80px;text-align:center}.wpm-controls{display:flex;align-items:center;gap:.5rem;margin-bottom:.25rem}.wpm-btn{padding:.25rem .75rem;font-weight:700}.speed-slider{width:120px;height:4px;background:#374151;border-radius:2px;-webkit-appearance:none;appearance:none}.speed-slider::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;background:var(--text-secondary);border-radius:50%;cursor:pointer;transition:background .2s}.speed-slider::-webkit-slider-thumb:hover{background:var(--text-primary)}