:root{color-scheme:dark;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.5;--header-height: 56px;--sidebar-width: 240px;--bg-primary: #0f0f0f;--bg-secondary: #272727;--bg-hover: #3a3a3a;--text-primary: #f1f1f1;--text-secondary: #aaaaaa;--accent: #ff0033;--border: #333333}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:var(--bg-primary);color:var(--text-primary)}.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:var(--bg-primary);display:flex;align-items:center;justify-content:space-between;padding:0 16px;z-index:100;border-bottom:1px solid var(--border)}.header-left{display:flex;align-items:center;gap:16px}.menu-btn{background:none;border:none;color:var(--text-primary);cursor:pointer;padding:8px;border-radius:50%;display:flex;align-items:center;justify-content:center}.menu-btn:hover{background:var(--bg-secondary)}.logo{display:flex;align-items:center;gap:8px}.logo-text{font-size:1.25rem;font-weight:700;letter-spacing:-.02em}.search-form{flex:1;max-width:640px;margin:0 40px}.search-container{display:flex;align-items:center;background:var(--bg-secondary);border-radius:24px;overflow:hidden;border:1px solid var(--border)}.search-input{flex:1;background:transparent;border:none;padding:10px 16px;color:var(--text-primary);font-size:1rem;outline:none}.search-input::placeholder{color:var(--text-secondary)}.search-btn{background:var(--bg-secondary);border:none;border-left:1px solid var(--border);padding:10px 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var(--border)}.video-stats{display:flex;gap:8px;color:var(--text-secondary);font-size:.9rem}.action-buttons{display:flex;gap:8px;flex-wrap:wrap}.action-btn{display:flex;align-items:center;gap:6px;background:var(--bg-secondary);border:none;color:var(--text-primary);padding:8px 16px;border-radius:20px;cursor:pointer;font-size:.85rem;font-weight:500}.action-btn:hover{background:var(--bg-hover)}.action-btn.active{background:var(--text-primary);color:var(--bg-primary)}.channel-info-bar{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid 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p{font-size:.75rem;color:var(--text-secondary);line-height:1.3}.empty-state{display:flex;align-items:center;justify-content:center;min-height:300px;color:var(--text-secondary);font-size:1.1rem}@media(max-width:1024px){.recommended-sidebar{width:320px}}@media(max-width:768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0);box-shadow:4px 0 20px #00000080}.content{margin-left:0!important;padding:12px}.player-content{flex-direction:column}.recommended-sidebar{width:100%}.search-form{margin:0 16px}.video-grid{grid-template-columns:1fr}.video-actions{flex-direction:column;align-items:flex-start}.channel-info-bar{flex-direction:column;gap:12px;align-items:flex-start}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--bg-secondary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--bg-hover)}