:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}.messages-container{background-color:#0046d5;flex-direction:column;height:100%;display:flex}.messages-header{color:#fff;padding:30px 20px}.messages-header h1{font-size:1.8rem;font-weight:700}.messages-content{background-color:#fff;flex:1;padding:20px 0;overflow-y:auto}.recent-section{padding:0 20px 20px}.recent-title{color:#414a4c;margin-bottom:15px;font-size:.9rem;font-weight:700}.recent-list{scrollbar-width:none;gap:20px;padding-bottom:10px;display:flex;overflow-x:auto}.recent-list::-webkit-scrollbar{display:none}.recent-contact{flex-direction:column;align-items:center;gap:8px;min-width:60px;display:flex}.recent-avatar{background-color:#e0e7ff;border-radius:50%;width:55px;height:55px}.tiles-section{padding:10px 20px}.message-tile{cursor:pointer;border-bottom:1px dotted #eee;align-items:center;gap:15px;padding:12px 16px;display:flex}.tile-avatar{border-radius:50%;width:50px;height:50px}.tile-info{flex-direction:column;flex:1;justify-content:center;display:flex}.tile-header{justify-content:space-between;align-items:baseline;display:flex}.tile-name{color:#1a1a1a;font-size:1rem;font-weight:600}.tile-time{color:#54656f;font-size:.75rem;font-weight:500}.tile-message{color:#3b3b3b;white-space:nowrap;text-overflow:ellipsis;max-width:100%;margin:2px 0 0;font-size:.85rem;overflow:hidden}.search-container{background-color:#fff;border-bottom:1px solid #f0f2f5;padding:8px 16px}.search-input-wrapper{background-color:#f0f2f5;border-radius:8px;align-items:center;gap:12px;padding:6px 14px;display:flex}.search-icon{color:#667781;-webkit-user-select:none;user-select:none;font-size:14px}.search-input{color:#111b21;background:0 0;border:none;outline:none;width:100%;font-size:14px}.search-error{color:#856404;text-align:center;border:1px solid #ffeeba;border-radius:8px;margin:20px 0;padding:20px}footer{background-color:#fff;border-top:1px solid #eaeaea;justify-content:flex-end;padding:10px 15px;display:flex}.add-contact-btn{box-sizing:border-box;color:gray;cursor:pointer;border:1px solid silver;border-radius:10px;justify-content:center;align-items:center;width:50px;height:50px;padding:5px;font-size:1rem;transition:all .2s;display:flex}.chat-container{background-color:#f5f7fb;flex-direction:column;width:100%;height:100%;display:flex}.chat-header{color:#fff;background-color:#0046d5;border-bottom:1px solid #d1d7db;align-items:flex-start;gap:12px;height:60px;padding:10px 20px;display:flex}.chat-header img{border:2px solid #ffffff4d;border-radius:50%;width:40px;height:40px}.chat-header span{flex:1;font-size:1.1rem;font-weight:600}.chat-main{background-color:#e5ddd5;flex-direction:column;flex:1;gap:10px;padding:20px;display:flex;overflow:hidden auto}.message{word-break:break-word;border-radius:18px;max-width:75%;padding:12px 16px;font-size:.95rem;line-height:1.4;box-shadow:0 1px .5px #00000021}.sent{color:#fff;background-color:#0046d5;border-bottom-right-radius:4px;align-self:flex-end}.received{color:#111b21;background-color:#fff;border:1px solid #e9edef;border-bottom-left-radius:4px;align-self:flex-start}.sender-info{opacity:.7;margin-top:4px;font-size:.7rem;display:block}.chat-footer{background:#fff;border-top:1px solid #eee;gap:10px;padding:12px 20px;display:flex}.chat-footer input{background:#f1f1f1;border:1px solid #ddd;border-radius:25px;outline:none;flex:1;padding:12px 18px}.chat-footer button{color:#fff;cursor:pointer;background:#0046d5;border:none;border-radius:25px;padding:10px 25px;font-weight:700}@media (width<=768px){.chat-header{padding:10px}.message{max-width:85%}.chat-footer{padding:10px}.chat-footer button{padding:10px 15px}}.back-arrow{color:#fff;filter:brightness(0)invert();cursor:pointer;background:0 0;border:none;padding-right:10px;font-size:1.5rem}.app-container{box-sizing:border-box;background-color:#f0f2f5;max-width:100%;height:100vh;margin:0;display:flex;overflow:hidden}.sidebar{background-color:#0046d5;border-right:1px solid #0000001a;flex-direction:column;width:30%;min-width:280px;max-width:350px;display:flex}.sidebar-header{background-color:#fff;justify-content:space-between;align-items:center;padding:10px 16px;display:flex}.sidebar-header h1{color:#111b21;margin:0;font-size:1.5rem}.sidebar-scrollable{flex:1;overflow-y:auto}.chat-panel{background-color:#fff;flex-direction:column;flex:1;display:flex;position:relative}@media (width<=768px){.sidebar{width:100%;min-width:0;max-width:none;display:var(--sidebar-display,flex)}.chat-panel{z-index:10;width:100%;height:100vh;display:var(--chat-display,none);position:fixed;top:0;left:0}.app-container.is-chatting{--sidebar-display:none;--chat-display:flex}}.empty-page-container{text-align:center;color:#667781;background-color:#f0f2f5;flex-direction:column;justify-content:center;align-items:center;height:100%;display:flex}.empty-state-card{flex-direction:row;gap:40px;margin-bottom:50px;display:flex}.action-item{cursor:pointer;flex-direction:column;align-items:center;gap:12px;transition:transform .2s;display:flex}.action-item:hover{color:#111b21;transform:translateY(-5px)}.icon-wrapper{background-color:#fff;border:1px solid #d1d7db;border-radius:50%;justify-content:center;align-items:center;width:80px;height:80px;font-size:32px;display:flex;box-shadow:0 2px 5px #0000000d}.action-item span{font-size:16px;font-weight:500}.footer-note{opacity:.7;font-size:12px;position:absolute;bottom:40px}.form-page-wrapper{box-sizing:border-box;background-color:#f1f5f9;justify-content:center;align-items:center;height:100vh;padding:20px;display:flex}.form-card{background:#fff;border:1px solid #e2e8f0;border-radius:24px;flex-direction:column;gap:24px;width:100%;max-width:400px;padding:40px;display:flex;box-shadow:0 15px 35px #0000000d}.profile-preview{align-items:center;gap:16px;margin-bottom:8px;display:flex}.avatar-placeholder{color:#64748b;background-color:#e2e8f0;border-radius:50%;justify-content:center;align-items:center;width:64px;height:64px;font-size:30px;display:flex}.header-form-container h2{color:#1e293b;margin:0;font-size:1.1rem;font-weight:700}.input-label{color:#64748b;margin-bottom:4px;font-size:.85rem;font-weight:600;display:block}.input-container,.input-container-active{box-sizing:border-box;color:#334155;background-color:#f8fafc;border:1.5px solid #e2e8f0;border-radius:12px;outline:none;width:100%;padding:12px 16px;font-size:.95rem;transition:all .2s cubic-bezier(.4,0,.2,1)}.input-container-active{background-color:#fff;border-color:#6366f1;box-shadow:0 0 0 4px #6366f11a}.login-btn,.login-btn-active{cursor:pointer;border:none;border-radius:14px;width:100%;margin-top:8px;padding:14px;font-size:1rem;font-weight:700;transition:all .2s}.login-btn{color:#fff;background-color:#6366f1}.login-btn-active{background-color:#4f46e5;transform:scale(.98)}.form-footer{text-align:center;border-top:1px solid #f1f5f9;padding-top:16px}.back-link{color:#6366f1;font-size:.9rem;font-weight:600;text-decoration:none;transition:color .2s}.error-message{color:#ef4444;background:#fef2f2;border:1px solid #fee2e2;border-radius:10px;margin-top:10px;padding:12px;font-size:.85rem;font-weight:500}