.app{min-height:100vh}.header{position:fixed;top:0;left:0;right:0;height:56px;padding:0 16px;display:flex;align-items:center;gap:16px;background:#fff;border-bottom:1px solid #e5e5e5;z-index:100}.menu-btn{padding:8px 12px;font-size:20px;color:#606060;border-radius:4px}.menu-btn:hover{background:#f2f2f2}.logo{display:flex;align-items:center;gap:4px}.logo-icon{font-size:24px;color:red}.logo-text{font-size:20px;font-weight:700;color:#0f0f0f;letter-spacing:-.5px}.search-bar{flex:1;max-width:640px;margin:0 auto;display:flex;height:40px}.search-input{flex:1;padding:0 16px;border:1px solid #ccc;border-right:none;border-radius:40px 0 0 40px;font-size:16px;outline:none}.search-input:focus{border-color:#065fd4}.search-btn{width:64px;border:1px solid #ccc;border-left:none;border-radius:0 40px 40px 0;background:#f8f8f8;font-size:18px}.search-btn:hover{background:#f0f0f0}.header-actions{display:flex;align-items:center;gap:8px}.icon-btn{padding:8px;font-size:20px;color:#606060;border-radius:50%}.icon-btn:hover{background:#f2f2f2}.avatar-btn{width:32px;height:32px;border-radius:50%;background:#065fd4;color:#fff;font-size:14px;font-weight:600}.app-body{display:flex;padding-top:56px}.sidebar{position:fixed;left:0;top:56px;bottom:0;width:72px;padding:12px 0;background:#fff;border-right:1px solid #e5e5e5;display:flex;flex-direction:column;align-items:center;gap:4px;z-index:50}.sidebar-item{width:100%;padding:16px 0;display:flex;flex-direction:column;align-items:center;gap:4px;font-size:10px;color:#606060}.sidebar-item:hover{background:#f2f2f2;color:#0f0f0f}.sidebar-icon{font-size:24px}.main-content{flex:1;margin-left:72px;padding:24px 24px 40px;min-height:calc(100vh - 56px)}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px 16px}.video-card{cursor:pointer}.video-thumbnail{position:relative;aspect-ratio:16 / 9;border-radius:12px;overflow:hidden;background:#e5e5e5;margin-bottom:12px}.video-thumbnail img{width:100%;height:100%;object-fit:cover}.video-duration{position:absolute;bottom:8px;right:8px;padding:2px 6px;background:#000000d9;color:#fff;font-size:12px;font-weight:500;border-radius:4px}.video-info{display:flex;gap:12px}.channel-avatar{width:36px;height:36px;border-radius:50%;background:#065fd4;color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;flex-shrink:0}.video-meta{min-width:0}.video-title{margin:0 0 4px;font-size:14px;font-weight:500;line-height:1.4;color:#0f0f0f;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.video-channel,.video-views{margin:0;font-size:12px;color:#606060}.video-card:hover .video-title{color:#065fd4}.video-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000d9;display:flex;align-items:center;justify-content:center;z-index:200;padding:24px}.video-modal{position:relative;width:100%;max-width:900px;background:#0f0f0f;border-radius:12px;overflow:hidden}.video-modal-close{position:absolute;top:12px;right:12px;width:40px;height:40px;border-radius:50%;background:#0009;color:#fff;font-size:20px;z-index:10;display:flex;align-items:center;justify-content:center}.video-modal-close:hover{background:#000c}.video-modal-player{aspect-ratio:16 / 9;background:#000}.video-modal-player video,.video-modal-player iframe{width:100%;height:100%;display:block;border:none}.video-modal-info{padding:16px}.video-modal-title{margin:0 0 8px;font-size:18px;font-weight:500;color:#fff}.video-modal-channel{margin:0;font-size:14px;color:#aaa}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:#f9f9f9;color:#0f0f0f}#root{min-height:100vh}button{font-family:inherit;cursor:pointer;border:none;background:none}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}