:root{--bg-color: #ffffff;--bg-color-secondary: #f0f2f5;--text-color: #1c1e21;--text-color-secondary: #65676b;--border-color: #ced0d4;--card-bg-color: #ffffff;--shadow-color: rgba(0, 0, 0, .1);--primary-color: #0d6efd;--primary-color-hover: #0b5ed7;--modal-overlay-color: rgba(0, 0, 0, .75)}[data-theme=dark]{--bg-color: #18191a;--bg-color-secondary: #242526;--text-color: #e4e6eb;--text-color-secondary: #b0b3b8;--border-color: #3a3b3c;--card-bg-color: #242526;--shadow-color: rgba(0, 0, 0, .3);--primary-color: #2374e1;--primary-color-hover: #1c68d1;--modal-overlay-color: rgba(0, 0, 0, .9)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.5;transition:background-color .2s,color .2s}#root{max-width:1600px;margin:0 auto;padding:1rem}.header{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:1.5rem;align-items:center}.header h1{font-size:1.75rem;margin-right:auto}.theme-switcher{background:none;border:1px solid var(--border-color);color:var(--text-color);padding:.5rem;border-radius:8px;cursor:pointer;font-size:1.25rem;line-height:1;display:flex;align-items:center;justify-content:center;transition:background-color .2s}.theme-switcher:hover{background-color:var(--bg-color-secondary)}.filters{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:1.5rem}.search-input,.filter-select{padding:.6rem .8rem;border-radius:8px;border:1px solid var(--border-color);background-color:var(--bg-color-secondary);color:var(--text-color);font-size:1rem}.search-input{flex-grow:1}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}.video-card{background-color:var(--card-bg-color);border-radius:12px;overflow:hidden;box-shadow:0 4px 12px var(--shadow-color);cursor:pointer;transition:transform .2s ease-in-out,box-shadow .2s ease-in-out;display:flex;flex-direction:column}.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 20px var(--shadow-color)}.thumbnail-container{position:relative;width:100%;background-color:var(--bg-color-secondary);overflow:hidden;min-height:150px;display:flex;align-items:center;justify-content:center}.thumbnail-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:blur(20px) brightness(.4);transform:scale(1.1);z-index:0}.thumbnail{width:100%;height:auto;display:block;z-index:1;object-fit:contain;max-height:400px;max-width:100%}.thumbnail-fallback{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;width:100%;height:250px;background:linear-gradient(135deg,var(--bg-color-secondary) 0%,var(--bg-color) 100%);color:var(--text-color-secondary);z-index:1;position:relative}.thumbnail-fallback svg{opacity:.5;width:48px;height:48px;flex-shrink:0}.thumbnail-fallback p{font-size:.85rem;margin:0;font-weight:500}.thumbnail-container.error{background:linear-gradient(135deg,var(--bg-color-secondary) 0%,var(--bg-color) 100%)}.video-views{position:absolute;bottom:8px;left:8px;background-color:#000c;color:#fff;padding:4px 8px;border-radius:4px;font-size:.75rem;font-weight:600;z-index:10;display:inline-flex;align-items:center;gap:4px;backdrop-filter:blur(4px)}.video-views svg{width:14px;height:14px}.video-duration{position:absolute;bottom:8px;right:8px;background-color:#000c;color:#fff;padding:4px 8px;border-radius:4px;font-size:.75rem;font-weight:600;z-index:10;backdrop-filter:blur(4px)}.video-info{padding:4px;display:flex;flex-direction:column;flex-grow:1}.video-title{font-size:1rem;font-weight:600;margin-bottom:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis;flex-grow:1}.loader,.error-message{display:flex;justify-content:center;align-items:center;padding:4rem;font-size:1.2rem}.loader-spinner{border:4px solid var(--bg-color-secondary);border-top:4px solid var(--primary-color);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite}.end-of-results-message{text-align:center;padding:2rem;color:var(--text-color-secondary)}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.modal-overlay{position:fixed;inset:0;background-color:var(--modal-overlay-color);display:flex;justify-content:center;align-items:center;z-index:1000;padding:1rem}.modal-content{background-color:#000;border-radius:12px;width:90vw;max-width:1280px;max-height:95vh;position:relative;overflow:hidden;display:flex;flex-direction:column;color:#fff}.modal-video-container{position:relative;width:100%;aspect-ratio:16 / 9;background-color:#000;display:flex;justify-content:center;align-items:center;flex-shrink:0}.modal-video-player{position:absolute;top:0;left:0;width:100%;height:100%;border:0}.modal-controls{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;background-color:#1a1a1a}.modal-close,.modal-download{background-color:#323232cc;color:#fff;border:none;border-radius:50%;width:40px;height:40px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color .2s}.modal-close:hover,.modal-download:hover{background-color:#505050}.back-to-top-btn{position:fixed;bottom:20px;right:20px;z-index:99;background-color:var(--primary-color);color:#fff;border:none;border-radius:50%;width:50px;height:50px;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px var(--shadow-color);opacity:0;visibility:hidden;transform:translateY(20px);transition:opacity .3s,visibility .3s,transform .3s,background-color .2s}.back-to-top-btn.show{opacity:1;visibility:visible;transform:translateY(0)}.back-to-top-btn:hover{background-color:var(--primary-color-hover)}