:root{--background-color: #f9fafb;--text-color: #1e293b;--border-color: #e2e8f0;--input-bg: #ffffff;--active-bg: #e0f2fe;--button-bg: #0ea5e9;--button-text: white;--button-hover: #0284c7;--caption-bg: #ffffff;--active-caption-bg: #e0f2fe;--hover-bg: #f1f5f9;--error-color: #ef4444;--success-color: #10b981;--border-radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--transition: all .2s ease}@media (prefers-color-scheme: dark){:root{--background-color: #0f172a;--text-color: #e2e8f0;--border-color: #334155;--input-bg: #1e293b;--active-bg: #0c4a6e;--button-bg: #0284c7;--button-text: #f1f5f9;--button-hover: #0369a1;--caption-bg: #1e293b;--active-caption-bg: #0c4a6e;--hover-bg: #334155;--error-color: #f87171;--success-color: #34d399;--shadow: 0 1px 3px rgba(0, 0, 0, .3)}}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.5;overflow:hidden}.container{max-width:1600px;margin:0 auto;padding:12px;background-color:var(--background-color);color:var(--text-color);height:100vh;overflow:hidden;display:flex;flex-direction:column}h1,h2{color:var(--text-color);margin-top:0}.input-section{margin-bottom:16px;text-align:center}.input-section h1{font-size:22px;margin-top:0;margin-bottom:12px;font-weight:600}.input-group{display:flex;gap:12px;width:100%;max-width:800px;margin:0 auto}.url-input{padding:10px 14px;font-size:15px;flex-grow:1;border:1px solid var(--border-color);border-radius:var(--border-radius);background-color:var(--input-bg);color:var(--text-color);box-shadow:var(--shadow);transition:var(--transition)}.url-input:focus{outline:none;border-color:var(--button-bg);box-shadow:0 0 0 2px #0ea5e933}.submit-button{padding:10px 16px;font-size:15px;background-color:var(--button-bg);color:var(--button-text);border:none;border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);white-space:nowrap;font-weight:500;box-shadow:var(--shadow)}.submit-button:hover:not(:disabled){background-color:var(--button-hover);transform:translateY(-1px)}.submit-button:active:not(:disabled){transform:translateY(0)}.submit-button:disabled{opacity:.6;cursor:not-allowed}.content{display:flex;flex-direction:column;gap:16px;height:calc(100vh - 100px);overflow:hidden}@media (min-width: 992px){.content{flex-direction:row}.video-section{flex:1;max-height:100%;overflow:hidden}.captions-section{flex:1;max-height:100%;overflow:hidden;display:flex;flex-direction:column}}.video-section{padding:16px;border-radius:var(--border-radius);background-color:var(--caption-bg);border:1px solid var(--border-color);box-shadow:var(--shadow);display:flex;flex-direction:column;background-color:#1a2234;color:#fff}.video-section h2,.captions-section h2{font-size:18px;margin-bottom:12px;font-weight:600;color:inherit}.video-section>div:first-of-type{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;justify-content:flex-start}.video-section>div:first-of-type button{padding:8px 16px;background-color:#0ea5e9;color:#fff;border:none;border-radius:20px;cursor:pointer;transition:var(--transition);font-size:14px;font-weight:500}.video-section>div:first-of-type button:hover{background-color:var(--button-hover)}.video-wrapper{position:relative;width:100%;display:flex;flex-direction:column;flex-grow:1;align-items:center;max-width:800px;margin:0 auto}.youtube-player{width:90%;aspect-ratio:16/9;border:none;border-radius:var(--border-radius);overflow:hidden;box-shadow:var(--shadow);margin:0 auto}.player-controls{display:flex;gap:12px;margin-top:0;margin-bottom:16px;flex-wrap:wrap;width:90%;justify-content:space-between;max-width:700px}.control-button{padding:12px 20px;font-size:15px;background-color:#0ea5e9;color:var(--button-text);border:none;border-radius:20px;cursor:pointer;transition:var(--transition);flex:1;min-width:120px;font-weight:500;display:flex;align-items:center;justify-content:center}.control-button:hover{background-color:var(--button-hover)}.control-button.active{background-color:var(--success-color)}.repeat-info{margin-top:16px;padding:12px 16px;background-color:var(--active-bg);border-radius:var(--border-radius);color:var(--text-color);font-size:14px;box-shadow:var(--shadow);border-left:4px solid var(--button-bg);width:90%;max-width:700px}.repeat-info div{margin-top:6px}.repeat-info small{opacity:.8;font-size:13px}.placeholder-message{padding:32px;text-align:center;color:var(--text-color);background-color:var(--input-bg);border-radius:var(--border-radius);margin:20px 0;opacity:.7;box-shadow:var(--shadow);border:1px dashed var(--border-color)}.captions-section{padding:16px;border-radius:var(--border-radius);background-color:var(--caption-bg);border:1px solid var(--border-color);box-shadow:var(--shadow)}.captions-container{overflow-y:auto;padding:4px;flex-grow:1;max-height:calc(100% - 60px);scrollbar-width:thin;scrollbar-color:var(--border-color) transparent}.captions-container::-webkit-scrollbar{width:6px}.captions-container::-webkit-scrollbar-track{background:transparent}.captions-container::-webkit-scrollbar-thumb{background-color:var(--border-color);border-radius:10px}.caption{padding:14px 16px;margin-bottom:12px;border-radius:var(--border-radius);background-color:var(--caption-bg);border:1px solid var(--border-color);cursor:pointer;transition:var(--transition);box-shadow:var(--shadow)}.caption:hover{background-color:var(--hover-bg);transform:translateY(-2px)}.caption.active{background-color:var(--active-bg);border-color:var(--button-bg);border-left-width:4px;transform:translate(2px)}.caption-header,.caption-time{display:none}.caption-controls{display:flex;justify-content:space-between;align-items:center;width:100%;margin-bottom:8px}.caption-controls span{flex:1;cursor:pointer;font-weight:500;font-size:15px}.caption-secondary{font-size:14px;margin-bottom:0;line-height:1.6;color:var(--text-color);opacity:.85}.loading-indicator{text-align:center;padding:30px;font-size:15px;color:var(--text-color)}.error-message{padding:16px;background-color:#ef44441a;border:1px solid var(--error-color);color:var(--error-color);border-radius:var(--border-radius);margin:20px 0;font-size:15px}.language-controls{display:flex;gap:12px;margin-bottom:16px;align-items:center;flex-wrap:wrap}.language-selector{display:flex;align-items:center;gap:8px;white-space:nowrap}.caption-title{font-size:18px;margin:0 12px 0 0;white-space:nowrap;font-weight:600}.language-selector label{font-weight:500;font-size:14px}.language-selector select{padding:6px 10px;border-radius:var(--border-radius);border:1px solid var(--border-color);background-color:var(--input-bg);color:var(--text-color);font-size:14px;box-shadow:var(--shadow);transition:var(--transition)}.language-selector select:focus{outline:none;border-color:var(--button-bg)}@media (max-width: 768px){.container{padding:10px}.input-section h1{font-size:18px}.input-group{flex-direction:column;gap:8px}.url-input,.submit-button{width:100%;padding:8px 12px}.content{height:calc(100vh - 120px)}.video-section,.captions-section{padding:12px}.youtube-player{aspect-ratio:16/9;height:auto}.language-controls{flex-direction:column;align-items:flex-start;gap:8px}.caption-title{margin-bottom:8px}.language-selector{width:100%}.language-selector select{flex:1}.control-button{font-size:13px;padding:8px 12px}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.caption{animation:fadeIn .3s ease}@keyframes highlight{0%{background-color:var(--active-bg)}50%{background-color:#0ea5e933}to{background-color:var(--active-bg)}}.caption.active{animation:highlight 2s infinite}@media (min-width: 1200px){.container{padding:16px}.content{gap:24px}}