:root{--primary: #7C3AED;--primary-light: #A78BFA;--primary-dark: #5B21B6;--secondary: #3B82F6;--accent: #F97316;--success: #10B981;--pink: #EC4899;--red: #EF4444;--bg: #0B0B12;--surface: #151520;--card: #1C1C2E;--card-hover: #242440;--border: rgba(255,255,255,.08);--text: #EEEEF5;--text-secondary: #8888A0;--text-muted: #555570;--shadow: 0 2px 12px rgba(0,0,0,.3);--shadow-lg: 0 8px 32px rgba(0,0,0,.4);--radius: 14px;--radius-sm: 8px;--radius-full: 9999px;--sidebar-w: 260px;--right-w: 300px;--transition: .2s ease;color-scheme:dark}[data-theme=light]{--bg: #F2F2FA;--surface: #FFFFFF;--card: #FFFFFF;--card-hover: #F7F7FC;--border: rgba(0,0,0,.08);--text: #1A1A2E;--text-secondary: #6B6B80;--text-muted: #9999AD;--shadow: 0 2px 12px rgba(0,0,0,.06);--shadow-lg: 0 8px 32px rgba(0,0,0,.1);color-scheme:light}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.app{display:flex;min-height:100vh}.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:20px 12px;z-index:100;overflow-y:auto}.sidebar-logo{display:flex;align-items:center;gap:10px;padding:8px 12px 24px;font-size:1.3rem;font-weight:700;color:var(--text);text-decoration:none}.sidebar-logo .logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff}.sidebar-nav{display:flex;flex-direction:column;gap:2px;flex:1}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;transition:all var(--transition);font-size:.95rem;font-weight:500;border:none;background:none;width:100%;text-align:left}.nav-item:hover{background:var(--card);color:var(--text)}.nav-item.active{background:var(--primary);color:#fff}.nav-item .nav-icon{font-size:1.2rem;width:24px;text-align:center}.nav-item .nav-badge{margin-left:auto;background:var(--pink);color:#fff;font-size:.7rem;font-weight:700;padding:2px 7px;border-radius:var(--radius-full);min-width:20px;text-align:center}.sidebar-create{margin:12px 0;padding:12px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;border:none;border-radius:var(--radius);font-size:.95rem;font-weight:600;cursor:pointer;transition:all var(--transition);display:flex;align-items:center;justify-content:center;gap:8px}.sidebar-create:hover{opacity:.9;transform:translateY(-1px)}.sidebar-footer{padding:12px;border-top:1px solid var(--border);margin-top:8px;display:flex;align-items:center;gap:10px}.sidebar-footer .avatar{width:36px;height:36px}.sidebar-footer .user-info{flex:1;min-width:0}.sidebar-footer .user-name{font-size:.85rem;font-weight:600;color:var(--text)}.sidebar-footer .user-handle{font-size:.75rem;color:var(--text-secondary)}.theme-toggle{background:var(--card);border:1px solid var(--border);width:34px;height:34px;border-radius:var(--radius-sm);cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:all var(--transition);color:var(--text-secondary)}.theme-toggle:hover{background:var(--card-hover);color:var(--text)}.main-content{margin-left:var(--sidebar-w);flex:1;display:flex;min-height:100vh}.page-content{flex:1;max-width:640px;margin:0 auto;padding:20px 20px 100px;width:100%}.right-panel{width:var(--right-w);padding:20px 16px;position:sticky;top:0;height:100vh;overflow-y:auto;flex-shrink:0}.avatar{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;color:#fff;flex-shrink:0;position:relative}.avatar-sm{width:32px;height:32px;font-size:.7rem}.avatar-lg{width:56px;height:56px;font-size:1.1rem}.avatar-xl{width:86px;height:86px;font-size:1.6rem;border:3px solid var(--bg)}.avatar-ring{padding:3px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--pink),var(--accent));display:inline-flex}.avatar-ring .avatar{border:2px solid var(--bg)}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all var(--transition)}.post-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:12px;transition:all var(--transition)}.post-card:hover{border-color:#ffffff1f}.post-header{display:flex;align-items:center;gap:10px;margin-bottom:12px}.post-header .post-info{flex:1;min-width:0}.post-header .post-author{font-weight:600;font-size:.9rem;color:var(--text)}.post-header .post-meta{font-size:.8rem;color:var(--text-secondary)}.post-content{font-size:.95rem;line-height:1.6;color:var(--text);margin-bottom:12px}.post-content .tag{color:var(--primary-light);cursor:pointer}.post-content .tag:hover{text-decoration:underline}.post-image{width:100%;border-radius:var(--radius-sm);margin-bottom:12px;aspect-ratio:16/10;object-fit:cover}.post-actions{display:flex;align-items:center;gap:4px;padding-top:8px;border-top:1px solid var(--border)}.post-action{display:flex;align-items:center;gap:6px;padding:8px 12px;border-radius:var(--radius-sm);border:none;background:none;color:var(--text-secondary);cursor:pointer;font-size:.85rem;transition:all var(--transition)}.post-action:hover{background:var(--card-hover);color:var(--text)}.post-action.liked{color:var(--pink)}.post-action.bookmarked{color:var(--accent)}.post-action .icon{font-size:1.1rem}.moments-bar{display:flex;gap:16px;padding:16px 0 20px;overflow-x:auto;scrollbar-width:none;margin-bottom:4px}.moments-bar::-webkit-scrollbar{display:none}.moment-item{display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer;flex-shrink:0}.moment-item .avatar-ring{padding:2px}.moment-item span{font-size:.7rem;color:var(--text-secondary);max-width:56px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.moment-add{position:relative}.moment-add .add-badge{position:absolute;bottom:2px;right:2px;width:18px;height:18px;background:var(--primary);border:2px solid var(--bg);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.65rem;color:#fff;font-weight:700}.feed-header{display:flex;align-items:center;gap:0;margin-bottom:16px;background:var(--card);border-radius:var(--radius);border:1px solid var(--border);padding:4px}.feed-tab{flex:1;padding:10px 16px;border:none;background:none;color:var(--text-secondary);font-size:.9rem;font-weight:600;cursor:pointer;border-radius:var(--radius-sm);transition:all var(--transition)}.feed-tab.active{background:var(--primary);color:#fff}.search-bar{display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-full);padding:10px 16px;margin-bottom:20px;transition:all var(--transition)}.search-bar:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px #7c3aed26}.search-bar input{flex:1;background:none;border:none;outline:none;color:var(--text);font-size:.9rem}.search-bar input::placeholder{color:var(--text-muted)}.search-bar .search-icon{color:var(--text-muted);font-size:1rem}.section-title{font-size:1.05rem;font-weight:700;color:var(--text);margin-bottom:14px;display:flex;align-items:center;justify-content:space-between}.section-title .see-all{font-size:.8rem;color:var(--primary-light);cursor:pointer;font-weight:600;background:none;border:none}.section-title .see-all:hover{text-decoration:underline}.trending-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}.trending-tag{padding:6px 14px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-full);font-size:.8rem;color:var(--text-secondary);cursor:pointer;transition:all var(--transition)}.trending-tag:hover{border-color:var(--primary);color:var(--primary-light)}.trending-tag.active{background:var(--primary);border-color:var(--primary);color:#fff}.sphere-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all var(--transition)}.sphere-card:hover{border-color:#ffffff1f;transform:translateY(-2px);box-shadow:var(--shadow)}.sphere-cover{height:80px;background:linear-gradient(135deg,var(--primary),var(--secondary));position:relative}.sphere-body{padding:12px}.sphere-name{font-weight:700;font-size:.9rem;margin-bottom:4px}.sphere-desc{font-size:.8rem;color:var(--text-secondary);margin-bottom:8px;line-height:1.4}.sphere-meta{display:flex;align-items:center;justify-content:space-between}.sphere-members{font-size:.75rem;color:var(--text-muted)}.sphere-join{padding:5px 14px;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;cursor:pointer;transition:all var(--transition);border:1px solid var(--primary);background:transparent;color:var(--primary-light)}.sphere-join:hover{background:var(--primary);color:#fff}.sphere-join.joined{background:var(--primary);color:#fff;border-color:var(--primary)}.spheres-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:24px}.chat-list{display:flex;flex-direction:column;gap:2px}.chat-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition)}.chat-item:hover,.chat-item.active{background:var(--card)}.chat-info{flex:1;min-width:0}.chat-name{font-weight:600;font-size:.9rem}.chat-preview{font-size:.8rem;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex-shrink:0}.chat-time{font-size:.7rem;color:var(--text-muted)}.chat-unread{background:var(--primary);color:#fff;font-size:.65rem;font-weight:700;width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center}.chat-view{display:flex;flex-direction:column;height:100%}.chat-header{display:flex;align-items:center;gap:12px;padding:16px;border-bottom:1px solid var(--border);background:var(--surface)}.chat-header .back-btn{background:none;border:none;color:var(--text);font-size:1.2rem;cursor:pointer;padding:4px;display:none}.chat-messages{flex:1;padding:16px;overflow-y:auto;display:flex;flex-direction:column;gap:8px}.message-bubble{max-width:75%;padding:10px 14px;border-radius:16px;font-size:.9rem;line-height:1.5}.message-bubble.sent{background:var(--primary);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}.message-bubble.received{background:var(--card);color:var(--text);align-self:flex-start;border-bottom-left-radius:4px;border:1px solid var(--border)}.message-time{font-size:.65rem;color:var(--text-muted);margin-top:2px}.message-time.sent{text-align:right}.chat-input-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-top:1px solid var(--border);background:var(--surface)}.chat-input-bar input{flex:1;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-full);padding:10px 16px;color:var(--text);font-size:.9rem;outline:none}.chat-input-bar input:focus{border-color:var(--primary)}.chat-send-btn{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.1rem;transition:all var(--transition)}.chat-send-btn:hover{opacity:.85}.profile-cover{height:160px;background:linear-gradient(135deg,var(--primary),var(--pink),var(--accent));border-radius:var(--radius);margin-bottom:-40px;position:relative}.profile-info{text-align:center;padding:0 16px 16px;position:relative;z-index:1}.profile-info .avatar-xl{margin:0 auto 12px}.profile-name{font-size:1.2rem;font-weight:700}.profile-handle{font-size:.85rem;color:var(--text-secondary);margin-bottom:8px}.profile-bio{font-size:.9rem;color:var(--text-secondary);margin-bottom:16px;line-height:1.5;max-width:400px;margin-left:auto;margin-right:auto}.profile-stats{display:flex;justify-content:center;gap:32px;margin-bottom:16px}.profile-stat{text-align:center}.profile-stat .num{font-weight:700;font-size:1.1rem;color:var(--text)}.profile-stat .label{font-size:.75rem;color:var(--text-secondary)}.profile-actions{display:flex;justify-content:center;gap:8px;margin-bottom:20px}.btn{padding:8px 20px;border-radius:var(--radius-full);font-size:.85rem;font-weight:600;cursor:pointer;transition:all var(--transition);border:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{opacity:.85}.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border)}.btn-outline:hover{background:var(--card)}.profile-tabs{display:flex;gap:0;margin-bottom:16px;background:var(--card);border-radius:var(--radius);border:1px solid var(--border);padding:4px}.profile-tab{flex:1;padding:10px;text-align:center;border:none;background:none;color:var(--text-secondary);font-size:.85rem;font-weight:600;cursor:pointer;border-radius:var(--radius-sm);transition:all var(--transition)}.profile-tab.active{background:var(--primary);color:#fff}.posts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;border-radius:var(--radius);overflow:hidden}.grid-item{aspect-ratio:1;cursor:pointer;position:relative;overflow:hidden}.grid-item:hover{opacity:.85}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);width:90%;max-width:520px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:slideUp .25s ease}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}.modal-header h3{font-size:1rem;font-weight:700}.modal-close{background:none;border:none;color:var(--text-secondary);font-size:1.3rem;cursor:pointer;padding:4px}.modal-close:hover{color:var(--text)}.modal-body{padding:20px}.modal-textarea{width:100%;min-height:120px;background:transparent;border:none;outline:none;color:var(--text);font-size:1rem;resize:none;font-family:inherit;line-height:1.6}.modal-textarea::placeholder{color:var(--text-muted)}.modal-footer{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-top:1px solid var(--border)}.modal-tools{display:flex;gap:8px}.modal-tool{width:36px;height:36px;border-radius:var(--radius-sm);background:var(--card);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:all var(--transition)}.modal-tool:hover{background:var(--card-hover);color:var(--text)}.widget{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:16px}.widget-title{font-size:.95rem;font-weight:700;margin-bottom:14px}.suggest-item{display:flex;align-items:center;gap:10px;padding:8px 0}.suggest-info{flex:1;min-width:0}.suggest-name{font-size:.85rem;font-weight:600}.suggest-handle{font-size:.75rem;color:var(--text-secondary)}.follow-btn{padding:5px 14px;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;cursor:pointer;transition:all var(--transition);background:var(--primary);color:#fff;border:none}.follow-btn:hover{opacity:.85}.follow-btn.following{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}.category-pills{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;margin-bottom:20px;scrollbar-width:none}.category-pills::-webkit-scrollbar{display:none}.category-pill{padding:8px 16px;border-radius:var(--radius-full);font-size:.8rem;font-weight:600;cursor:pointer;transition:all var(--transition);white-space:nowrap;background:var(--card);border:1px solid var(--border);color:var(--text-secondary)}.category-pill:hover{border-color:var(--primary);color:var(--primary-light)}.category-pill.active{background:var(--primary);border-color:var(--primary);color:#fff}.creator-scroll{display:flex;gap:16px;overflow-x:auto;padding:4px 0 16px;scrollbar-width:none}.creator-scroll::-webkit-scrollbar{display:none}.creator-card{text-align:center;flex-shrink:0;width:100px;cursor:pointer}.creator-card .avatar{margin:0 auto 6px}.creator-card .name{font-size:.8rem;font-weight:600;max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.creator-card .handle{font-size:.7rem;color:var(--text-secondary)}.empty-state{text-align:center;padding:48px 24px;color:var(--text-secondary)}.empty-state .icon{font-size:2.5rem;margin-bottom:12px}.empty-state h3{font-size:1rem;margin-bottom:8px;color:var(--text)}.empty-state p{font-size:.85rem}.page-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}.page-header h2{font-size:1.2rem;font-weight:700}@media(max-width:1100px){.right-panel{display:none}}@media(max-width:768px){.sidebar{position:fixed;bottom:0;left:0;right:0;top:auto;width:100%;height:64px;flex-direction:row;padding:0;border-right:none;border-top:1px solid var(--border);z-index:100}.sidebar-logo,.sidebar-footer,.sidebar-create,.sidebar-nav .nav-label{display:none}.sidebar-nav{flex-direction:row;width:100%;justify-content:space-around;align-items:center;padding:0 8px}.nav-item{flex-direction:column;gap:2px;padding:8px 12px;font-size:.65rem}.nav-item .nav-icon{font-size:1.3rem}.nav-item .nav-badge{position:absolute;top:2px;right:2px;font-size:.6rem;padding:1px 4px}.nav-item{position:relative}.main-content{margin-left:0;margin-bottom:64px}.page-content{padding:16px 12px 100px}.spheres-grid{grid-template-columns:1fr}.posts-grid{grid-template-columns:repeat(3,1fr)}.profile-cover{height:120px}.chat-header .back-btn{display:block}}.flex{display:flex}.items-center{align-items:center}.gap-2{gap:8px}.gap-3{gap:12px}.mb-2{margin-bottom:8px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.text-sm{font-size:.85rem}.text-xs{font-size:.75rem}.text-muted{color:var(--text-secondary)}.font-bold{font-weight:700}.w-full{width:100%}