:root{--bg:#f4f5f7;--surface:#fff;--border:#e2e5ea;--text:#1c1e21;--muted:#65676b;--primary:#4f46e5;--primary-dark:#4338ca;--danger:#dc2626;--radius:10px}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}button{cursor:pointer;font-family:inherit}input,textarea{font-family:inherit;font-size:14px}.centered{height:60vh;color:var(--muted);justify-content:center;align-items:center;display:flex}.navbar{background:var(--surface);border-bottom:1px solid var(--border);z-index:10;justify-content:space-between;align-items:center;padding:12px 24px;display:flex;position:sticky;top:0}.navbar .brand{color:var(--primary);font-size:20px;font-weight:700;text-decoration:none}.nav-links{align-items:center;gap:18px;display:flex}.nav-links a{color:var(--text);font-size:14px;text-decoration:none}.avatar{object-fit:cover;width:32px;height:32px;color:var(--primary-dark);background:#e0e7ff;border-radius:50%;flex:none;place-items:center;font-weight:700;line-height:1;display:inline-grid}.account-link{align-items:center;gap:6px;display:inline-flex}.nav-avatar{width:26px;height:26px;font-size:12px}.message-nav-link{align-items:center;gap:5px;display:inline-flex}.unread-dot{background:#e11d48;border-radius:50%;flex-shrink:0;width:9px;height:9px;display:inline-block}.user-search{flex:1;max-width:300px;margin:0 16px;position:relative}.user-search input{border:1px solid var(--border);background:var(--bg);border-radius:20px;width:100%;padding:9px 12px}.user-search-results{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);min-width:210px;max-height:280px;padding:6px;position:absolute;top:calc(100% + 7px);left:0;right:0;overflow-y:auto;box-shadow:0 8px 24px #0000001f}.user-search-results p{margin:4px 0;padding:4px 8px}.user-search-result{color:var(--text);border-radius:8px;align-items:center;gap:9px;padding:8px;font-size:14px;text-decoration:none;display:flex}.user-search-result:hover,.user-search-result:focus-visible{background:var(--bg)}.search-avatar{width:30px;height:30px;font-size:14px}.link-btn{color:var(--muted);background:0 0;border:none;font-size:14px}.page-container{max-width:640px;margin:0 auto;padding:20px 16px 60px}.auth-form{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);text-align:center;max-width:360px;margin:80px auto;padding:32px}.auth-form h1{margin-bottom:20px;font-size:20px}.auth-form form{flex-direction:column;gap:10px;display:flex}.auth-form input{border:1px solid var(--border);border-radius:8px;padding:10px 12px}.auth-form button{background:var(--primary);color:#fff;border:none;border-radius:8px;padding:10px;font-weight:600}.auth-form button:hover{background:var(--primary-dark)}.error{color:var(--danger);font-size:13px}.new-post{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;padding:14px}.new-post textarea{resize:vertical;border:none;outline:none;width:100%;min-height:60px}.new-post-actions{justify-content:space-between;align-items:center;margin-top:8px;display:flex}.new-post-actions button{background:var(--primary);color:#fff;border:none;border-radius:8px;padding:8px 18px;font-weight:600}.tabs{gap:8px;margin-bottom:16px;display:flex}.tabs button{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:6px 14px;font-size:13px}.tabs button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.muted{color:var(--muted);font-size:14px}.post-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:14px;padding:14px}.post-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.post-author{color:var(--text);align-items:center;gap:8px;font-weight:600;text-decoration:none;display:inline-flex}.post-avatar{width:32px;height:32px;font-size:14px}.post-date{color:var(--muted);font-size:12px}.post-content{white-space:pre-wrap;margin:0 0 10px}.post-image{object-fit:cover;border-radius:8px;width:100%;max-height:420px;margin-bottom:10px}.post-actions{gap:14px;display:flex}.post-actions button{color:var(--muted);background:0 0;border:none;font-size:14px}.post-actions button.liked{color:#e0245e}.post-actions button.danger{color:var(--danger);margin-left:auto}.comment-section{border-top:1px solid var(--border);margin-top:10px;padding-top:10px}.comment{align-items:flex-start;gap:7px;margin-bottom:6px;font-size:13px;display:flex}.comment-avatar{width:24px;height:24px;font-size:11px}.comment-body{overflow-wrap:anywhere;white-space:pre-wrap;flex:1;min-width:0}.comment-author{margin-right:6px;font-weight:600}.comment-form{gap:8px;margin-top:8px;display:flex}.comment-form input{border:1px solid var(--border);border-radius:20px;flex:1;padding:8px 10px}.comment-form button{background:var(--primary);color:#fff;border:none;border-radius:20px;padding:0 16px}.profile-header{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;padding:18px}.profile-header h1{margin:0 0 6px;font-size:22px}.profile-identity{align-items:center;gap:18px;display:flex}.profile-identity>div{overflow-wrap:anywhere;min-width:0}.profile-avatar{width:96px;height:96px;font-size:40px}.avatar-actions{flex-wrap:wrap;gap:4px;display:flex}.profile-header button{background:var(--primary);color:#fff;border:none;border-radius:8px;margin-top:8px;margin-right:8px;padding:8px 16px;font-size:13px}.profile-header .remove-avatar{background:var(--bg);color:var(--text)}.profile-header button:disabled{opacity:.6;cursor:wait}.profile-stats{color:var(--muted);gap:18px;margin-top:12px;font-size:13px;display:flex}.bio-edit textarea{border:1px solid var(--border);border-radius:8px;width:100%;min-height:60px;padding:8px}.messages-layout{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);height:75vh;display:flex;overflow:hidden}.conversation-list{border-right:1px solid var(--border);width:220px;padding:10px;overflow-y:auto}.conversation-list input{border:1px solid var(--border);border-radius:8px;width:100%;margin-bottom:8px;padding:8px 10px}.search-results,.conversation-item{cursor:pointer;border-radius:8px;padding:8px;font-size:13px}.conversation-item{width:100%;color:var(--text);text-align:left;background:0 0;border:0;display:block}.conversation-item:hover,.search-results div:hover{background:var(--bg)}.conversation-item.active{background:#eef2ff}.conversation-name-row{justify-content:space-between;align-items:center;gap:6px;display:flex}.conversation-main{align-items:center;gap:8px;display:flex}.conversation-avatar{width:32px;height:32px;font-size:14px}.conversation-details{flex:1;min-width:0}.conversation-name{font-weight:600}.conversation-preview{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:12px;display:block;overflow:hidden}.thread{flex-direction:column;flex:1;display:flex}.thread-header{border-bottom:1px solid var(--border);align-items:center;gap:8px;padding:12px 16px;font-weight:600;display:flex}.thread-error{margin:8px 16px}.thread-messages{flex-direction:column;flex:1;gap:8px;padding:14px;display:flex;overflow-y:auto}.bubble{border-radius:16px;max-width:65%;padding:8px 12px;font-size:14px}.bubble.mine{background:var(--primary);color:#fff;align-self:flex-end}.bubble.theirs{background:var(--bg);align-self:flex-start}.thread-input{border-top:1px solid var(--border);gap:8px;padding:10px;display:flex}.thread-input input{border:1px solid var(--border);border-radius:20px;flex:1;padding:10px 12px}.thread-input button{background:var(--primary);color:#fff;border:none;border-radius:20px;padding:0 18px}@media (width<=620px){.navbar{flex-wrap:wrap;gap:10px;padding:10px 14px}.nav-links{flex-wrap:wrap;justify-content:flex-end;gap:10px;margin-left:auto}.user-search{flex:1 0 100%;order:3;max-width:none;margin:0}}@media (width<=520px){.profile-avatar{width:72px;height:72px;font-size:30px}.messages-layout{flex-direction:column}.conversation-list{border-right:0;border-bottom:1px solid var(--border);flex-shrink:0;width:100%;height:165px}.thread{min-height:0}}