:root{--bg-primary: #0f0f0f;--bg-secondary: #272727;--text-primary: #ffffff;--text-secondary: #aaaaaa;--accent-color: #ff0000;--card-bg: #1e1e1e;--font-family: "Roboto", "Inter", system-ui, sans-serif;--transition-speed: .3s}body{margin:0;padding:0;font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;overflow-x:hidden}*{box-sizing:border-box}a{text-decoration:none;color:inherit}button{cursor:pointer;border:none;background:none;font-family:inherit;color:inherit}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:#555;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#777}.header{display:flex;justify-content:space-between;align-items:center;padding:0 24px;height:64px;background-color:#0f0f0ff2;position:sticky;top:0;z-index:100;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.1)}.logo-container{display:flex;align-items:center;gap:8px;cursor:pointer}.logo-text{font-size:1.2rem;font-weight:700;letter-spacing:-.5px}.search-bar{display:flex;align-items:center;background-color:#121212;border:1px solid #303030;border-radius:20px;padding:0 16px;width:40%;max-width:600px;height:40px;transition:border-color .2s}.search-bar:focus-within{border-color:#1c62b9}.search-bar input{flex:1;background:transparent;border:none;color:var(--text-primary);font-size:1rem;outline:none}.search-bar button{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:0 8px;border-left:1px solid #303030;margin-left:8px}.search-bar button:hover{color:var(--text-primary)}.user-actions{display:flex;align-items:center;gap:20px}.icon{color:var(--text-primary);cursor:pointer;opacity:.8;transition:opacity .2s}.icon:hover{opacity:1}@media(max-width:768px){.search-bar{display:none}}.category-container{display:flex;flex-direction:column;position:sticky;top:64px;z-index:90;background-color:var(--bg-primary);border-bottom:1px solid rgba(255,255,255,.1)}.category-bar{display:flex;gap:12px;padding:8px 24px;overflow-x:auto;align-items:center}.category-bar.sub-categories{padding-top:4px;padding-bottom:12px;background-color:var(--bg-primary)}.category-chip{padding:6px 16px;background-color:#ffffff1a;border-radius:8px;font-size:.9rem;font-weight:500;color:var(--text-primary);white-space:nowrap;transition:background-color .2s,color .2s;border:1px solid transparent}.category-chip:hover{background-color:#fff3}.category-chip.active{background-color:var(--text-primary);color:var(--bg-primary)}.category-chip.main{font-size:1rem;padding:8px 18px;border-radius:20px}.category-chip.sub{font-size:.85rem;padding:5px 14px;background-color:transparent;border:1px solid rgba(255,255,255,.15)}.category-chip.sub.active{background-color:#ffffffe6;color:#000;border-color:transparent}.video-card{display:flex;flex-direction:column;gap:12px;cursor:pointer;width:100%}.thumbnail-container{position:relative;width:100%;padding-bottom:56.25%;border-radius:12px;overflow:hidden;background-color:#2a2a2a}.thumbnail-container img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .2s}.video-card:hover .thumbnail-container img{transform:scale(1.03)}.video-info{display:flex;gap:12px;padding-right:24px}.avatar-placeholder{width:36px;height:36px;border-radius:50%;background-color:#555;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0}.video-details{display:flex;flex-direction:column}.video-title{margin:0 0 4px;font-size:1rem;font-weight:600;line-height:1.4;color:#fff;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis}.channel-name{font-size:.9rem;color:#aaa;margin-bottom:2px}.video-meta{font-size:.85rem;color:#aaa;display:flex;align-items:center;gap:4px}.modal-overlay{position:fixed;inset:0;background-color:#000000d9;display:flex;justify-content:center;align-items:center;z-index:1000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.modal-content{position:relative;width:90%;max-width:1280px;background-color:var(--bg-primary);border-radius:12px;box-shadow:0 4px 30px #00000080;overflow:hidden}.close-button{position:absolute;top:10px;right:10px;color:#fff;background:#0009;border:none;cursor:pointer;z-index:1002;padding:8px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:background-color .2s,transform .2s}.close-button:hover{background:#f00c;transform:scale(1.1)}.video-wrapper{position:relative;padding-bottom:56.25%;height:0;background-color:#000}.video-wrapper iframe{position:absolute;top:0;left:0;width:100%;height:100%}.app{min-height:100vh;background-color:var(--bg-primary);display:flex;flex-direction:column}.main-content{padding:24px;max-width:1800px;margin:0 auto;width:100%}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px 16px}.loading,.error{text-align:center;padding:40px;font-size:1.2rem;color:var(--text-secondary)}.error{color:#ff4d4d}@media(max-width:600px){.video-grid{grid-template-columns:1fr}}