.app{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2rem;padding:2rem}.main-controls{display:flex;align-items:center;gap:.75rem;justify-content:center;flex-wrap:wrap}.control-btn{padding:.75rem;font-size:1.5rem;font-weight:500;background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:8px;color:#fff;cursor:pointer;transition:all .2s;white-space:nowrap;width:60px;height:60px;display:flex;align-items:center;justify-content:center;-webkit-user-select:none;user-select:none}.control-btn:hover:not(:disabled){background:#ffffff1a;border-color:#fff3;transform:translateY(-2px)}.control-btn:active:not(:disabled){transform:translateY(0)}.control-btn:disabled{opacity:.3;cursor:not-allowed}.control-btn.start-btn{background:#10b9811a;border-color:#10b9814d;color:#10b981;font-size:1.3rem}.control-btn.start-btn:hover:not(:disabled){background:#10b98133;border-color:#10b98180}.control-btn.pause-btn{background:#f59e0b1a;border-color:#f59e0b4d;color:#f59e0b;font-size:1.3rem}.control-btn.pause-btn:hover:not(:disabled){background:#f59e0b33;border-color:#f59e0b80}.control-btn.reset-btn{background:#06b6d41a;border-color:#06b6d44d;color:#06b6d4;font-size:1.5rem}.control-btn.reset-btn:hover:not(:disabled){background:#06b6d433;border-color:#06b6d480}.control-btn.clear-btn{background:#ef44441a;border-color:#ef44444d;color:#ef4444e6;font-size:1.3rem;flex-shrink:0}.control-btn.clear-btn:hover:not(:disabled){background:#ef444433;border-color:#ef444480}.status-bar{display:flex;justify-content:center;gap:1rem;margin-top:.5rem}.topic-counter{font-size:1.1rem;font-weight:600;color:#ffffffb3;text-align:center}.navigation{display:none}.nav-btn{padding:.75rem 1.5rem;font-size:1rem;font-weight:500;background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:8px;color:#fff;cursor:pointer;transition:all .2s;white-space:nowrap}.keyboard-hints-desktop{display:none}@media(max-width:480px){.app{padding:.5rem;gap:.75rem}.main-controls{gap:.5rem}.control-btn{padding:.5rem;font-size:1.2rem;width:50px;height:50px}.control-btn.start-btn,.control-btn.pause-btn{font-size:1.1rem}.control-btn.reset-btn,.control-btn.clear-btn{font-size:1.2rem}.topic-counter{font-size:.9rem}}.stopwatch-container{display:flex;flex-direction:column;align-items:center;gap:2.5rem}.mobile-pie-view{display:none}.desktop-watch-view{display:flex;flex-direction:column;align-items:center;gap:2.5rem}.topic-display{text-align:center;max-width:800px;padding:0 2rem}.topic-text{font-size:2.5rem;font-weight:700;background:linear-gradient(135deg,#06b6d4,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0;letter-spacing:-.02em}.stopwatch{position:relative;width:500px;height:500px;display:flex;align-items:center;justify-content:center}.stopwatch-bezel{position:relative;width:100%;height:100%;border-radius:50%;background:linear-gradient(135deg,#2a2a3e,#1f1f2e);box-shadow:0 20px 60px #00000080,inset 0 0 30px #0000004d,inset 0 2px 4px #ffffff1a;display:flex;align-items:center;justify-content:center;padding:20px}.progress-ring{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:2}.stopwatch-face{position:relative;width:90%;height:90%;border-radius:50%;background:linear-gradient(135deg,#2d2d44,#1a1a2a);box-shadow:inset 0 4px 20px #0009,inset 0 -2px 10px #ffffff08,0 0 40px #0000004d;display:flex;align-items:center;justify-content:center;overflow:hidden}.hour-marker{position:absolute;width:12px;height:12px;transform:translate(-50%,-50%);z-index:1}.marker-dot{width:100%;height:100%;background:#fff6;border-radius:50%;box-shadow:0 0 8px #ffffff4d}.minute-marker{position:absolute;width:3px;height:3px;background:#fff3;border-radius:50%;transform:translate(-50%,-50%);z-index:1}.digital-display{position:absolute;top:60%;left:50%;transform:translate(-50%);z-index:3;text-align:center}.digital-time{font-size:3rem;font-weight:700;font-variant-numeric:tabular-nums;text-shadow:0 0 20px currentColor;letter-spacing:.05em;transition:color .3s ease}.milliseconds{font-size:2rem;opacity:.8}.hand{position:absolute;bottom:50%;left:50%;width:6px;height:40%;transform-origin:bottom center;border-radius:3px 3px 0 0;transition:transform .05s linear,background-color .3s ease,box-shadow .3s ease;z-index:4;margin-left:-3px}.second-hand{background:linear-gradient(to top,currentColor,rgba(255,255,255,.9));filter:drop-shadow(0 0 4px currentColor)}.hand-tip{position:absolute;top:-8px;left:50%;transform:translate(-50%);width:12px;height:12px;border-radius:50%;box-shadow:0 0 12px currentColor}.center-dot{position:absolute;width:20px;height:20px;border-radius:50%;z-index:5;box-shadow:0 0 20px currentColor,inset 0 2px 4px #fff6;transition:background-color .3s ease}.controls{display:flex;gap:1rem;align-items:center}.control-btn{display:flex;align-items:center;gap:.5rem;padding:1rem 2rem;font-size:1.1rem;font-weight:600;border-radius:12px;cursor:pointer;transition:all .2s;background:#ffffff0d;color:#fff;border:2px solid rgba(255,255,255,.1)}.control-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px #0000004d}.start-btn{background:linear-gradient(135deg,#06b6d4,#0891b2);border-color:#06b6d4;box-shadow:0 4px 16px #06b6d44d}.start-btn:hover{box-shadow:0 8px 24px #06b6d480}.pause-btn{background:linear-gradient(135deg,#f59e0b,#d97706);border-color:#f59e0b;box-shadow:0 4px 16px #f59e0b4d}.pause-btn:hover{box-shadow:0 8px 24px #f59e0b80}.reset-btn:hover{background:#ffffff1a;border-color:#fff3}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}.topic-display-mobile{text-align:center;padding:0 .5rem;margin-bottom:.5rem}.topic-text-mobile{font-size:1rem;font-weight:700;background:linear-gradient(135deg,#06b6d4,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0;line-height:1.2}.pie-chart{width:120px;height:120px;margin:0 auto;display:block;overflow:visible}.pie-segment{transition:fill .3s ease,filter .3s ease}.pie-time,.pie-ms{font-variant-numeric:tabular-nums;text-shadow:0 0 4px rgba(0,0,0,.5)}.mobile-controls{display:flex;gap:.5rem;justify-content:center;margin-top:.75rem}.mobile-control-btn{display:flex;align-items:center;justify-content:center;width:32px;height:16px;font-size:.7rem;font-weight:600;border-radius:4px;cursor:pointer;transition:all .2s;color:#fff;border:1px solid rgba(255,255,255,.2);flex-shrink:0;background:#ffffff0d}.mobile-control-btn:hover{background:#ffffff1a;transform:translateY(-1px)}.mobile-control-btn:active{background:#ffffff26;transform:scale(.95)}.mobile-main-btn{background:#06b6d433;border-color:#06b6d466}.mobile-main-btn:hover{background:#06b6d44d}.mobile-reset-btn{background:#ffffff0d;border-color:#fff3}.keyboard-hints{font-size:.65rem;color:#fff6;text-align:center;margin-top:.5rem;font-family:monospace}@media(max-width:480px){.stopwatch-container{gap:.75rem}.desktop-watch-view,.desktop-controls{display:none!important}.mobile-pie-view{display:flex;flex-direction:column;align-items:center;width:100%;max-width:200px;margin:0 auto}.pie-chart{width:120px;height:120px}.topic-text-mobile{font-size:.9rem}.mobile-control-btn{width:28px;height:16px;font-size:.65rem}}@media(max-width:768px){.stopwatch{width:350px;height:350px}.topic-text{font-size:1.8rem}.digital-time{font-size:2rem}.milliseconds{font-size:1.4rem}.control-btn{padding:.75rem 1.5rem;font-size:1rem}}.file-upload-container{display:flex;flex-direction:column;align-items:center;gap:2rem;max-width:600px;margin:0 auto;padding:2rem}.branding{text-align:center;margin-bottom:1rem}.app-title{font-size:4rem;font-weight:800;background:linear-gradient(135deg,#06b6d4,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0;letter-spacing:-.03em}.app-subtitle{font-size:1.2rem;color:#fff9;margin:.5rem 0 0;font-weight:400;letter-spacing:.1em;text-transform:uppercase}.upload-area{width:100%;padding:4rem 2rem;border:3px dashed rgba(255,255,255,.2);border-radius:16px;background:#ffffff05;cursor:pointer;transition:all .3s ease;display:flex;flex-direction:column;align-items:center;gap:1rem}.upload-area:hover{border-color:#06b6d480;background:#06b6d40d;transform:translateY(-4px)}.upload-area.dragging{border-color:#06b6d4;background:#06b6d41a;transform:scale(1.02)}.upload-icon{color:#fff6;transition:all .3s ease}.upload-area:hover .upload-icon{color:#06b6d4;transform:translateY(-4px)}.upload-title{font-size:1.5rem;font-weight:600;color:#ffffffe6;margin:0}.upload-description{font-size:1rem;color:#fff9;margin:0}.upload-hint{font-size:.875rem;color:#fff6;padding:.5rem 1rem;background:#ffffff0d;border-radius:20px}.error-message{display:flex;align-items:center;gap:.75rem;padding:1rem 1.5rem;background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:8px;color:#fca5a5;font-size:.95rem;width:100%;box-sizing:border-box}.error-message svg{flex-shrink:0}.format-guide{width:100%;padding:1.5rem;background:#ffffff08;border:1px solid rgba(255,255,255,.1);border-radius:12px}.guide-title{font-size:1.1rem;font-weight:600;color:#ffffffe6;margin:0 0 1rem}.guide-content{background:#0000004d;border-radius:8px;padding:1rem}.presenter-mode-option{margin:2rem 0 1rem;padding:1.25rem;background:#ffffff08;border:1px solid rgba(255,255,255,.1);border-radius:12px;text-align:center}.checkbox-label{display:inline-flex;align-items:center;gap:.75rem;cursor:pointer;font-size:1.1rem;font-weight:500;color:#ffffffe6;-webkit-user-select:none;user-select:none}.checkbox-label input[type=checkbox]{width:20px;height:20px;cursor:pointer;accent-color:#06b6d4}.option-hint{margin:.5rem 0 0;font-size:.85rem;color:#ffffff80}.format-example{display:block;font-family:Consolas,Monaco,Courier New,monospace;font-size:.9rem;color:#06b6d4;line-height:1.8}@media(max-width:768px){.app-title{font-size:3rem}.upload-area{padding:3rem 1.5rem}.upload-title{font-size:1.2rem}}