:root{--bg-color: #0c0d10;--sidebar-bg: #111418;--sidebar-hover: #1b1f24;--card-bg: #1c1f26;--accent-color: #00a884;--accent-hover: #008f70;--text-primary: #e9edef;--text-secondary: #8696a0;--border-color: #22262b;--message-bg: #1e2126;--message-out-bg: #005c4b;--font-main: "Inter", system-ui, -apple-system, sans-serif;--radius-lg: 16px;--radius-md: 10px;--shadow: 0 4px 20px rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-main);background-color:var(--bg-color);color:var(--text-primary);overflow:hidden;height:100vh;height:-webkit-fill-available;height:100dvh}#root{height:100%}.app-container{display:flex;height:100vh;height:-webkit-fill-available;height:100dvh;width:100vw}.sidebar{width:380px;background-color:var(--sidebar-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column}.sidebar-header{padding:16px 20px;display:flex;align-items:center;gap:12px}.avatar-small{width:32px;height:32px;background:var(--accent-color);border-radius:50%;display:flex;align-items:center;justify-content:center}.sidebar-header h1{font-size:1.25rem;font-weight:700;color:var(--text-primary)}.search-container{padding:10px 16px 16px}.search-bar{background:#1b1f24;border-radius:12px;display:flex;align-items:center;padding:0 12px}.search-icon{color:var(--text-secondary)}.search-input{flex:1;background:transparent;border:none;padding:12px 8px;color:var(--text-primary);font-size:16px;outline:none}.chat-list{flex:1;overflow-y:auto}.chat-item{padding:14px 16px;margin:6px 12px;border-radius:12px;cursor:pointer;display:flex;gap:12px;transition:all .2s cubic-bezier(.4,0,.2,1);border:1px solid rgba(255,255,255,.03)}.chat-item:hover{background-color:var(--sidebar-hover);border-color:#ffffff1a}.chat-item.active{background-color:#20242a;border-color:#00a8844d}.chat-avatar{width:48px;height:48px;background:linear-gradient(135deg,#00a884,#008f70);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem;flex-shrink:0}.chat-info{flex:1;min-width:0;display:flex;flex-direction:column;justify-content:center}.chat-name-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.chat-name{font-weight:600;font-size:.95rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-time{font-size:.75rem;color:var(--text-secondary)}.chat-preview{font-size:.85rem;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-window{flex:1;display:flex;flex-direction:column;background-color:#0b141a;position:relative}.chat-header{height:64px;background-color:var(--sidebar-bg);padding:0 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border-color);z-index:10}.chat-header-info{display:flex;align-items:center;gap:12px}.chat-header-info .chat-avatar{width:40px;height:40px;font-size:1rem}.chat-header-name{font-weight:600;font-size:1rem}.chat-header-status{font-size:.8rem;color:var(--text-secondary)}.chat-header-actions{display:flex;gap:20px;color:var(--text-secondary)}.message-list{flex:1;padding:20px 5%;overflow-y:auto;display:flex;flex-direction:column-reverse;gap:8px;background-image:url(https://user-images.githubusercontent.com/15075759/28719144-86dc0f70-73b1-11e7-911d-60d70fcded21.png);background-blend-mode:overlay;background-color:#0b141a;background-size:400px}.date-header{display:flex;justify-content:center;margin:16px 0}.date-header span{background:#182229;padding:6px 12px;border-radius:8px;font-size:.75rem;font-weight:500;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;box-shadow:0 1px 3px #0003}.message{max-width:65%;padding:6px 8px 8px;border-radius:8px;position:relative;font-size:.9rem;line-height:1.4;box-shadow:0 1px 1px #0003}.message.received{align-self:flex-start;background-color:var(--message-bg);border-top-left-radius:0}.message.sent{align-self:flex-end;background-color:var(--message-out-bg);border-top-right-radius:0}.sender-name{font-size:.75rem;font-weight:700;color:#53bdeb;margin-bottom:2px}.message-text{word-wrap:break-word;white-space:pre-wrap}.message-meta{display:flex;justify-content:flex-end;font-size:.65rem;color:#ffffff73;margin-top:2px;margin-left:20px}.media-thumbnail{margin:2px 0 4px;border-radius:6px;overflow:hidden;max-width:100%;cursor:pointer}.media-thumbnail img,.media-thumbnail video{display:block;max-width:100%;max-height:400px;object-fit:cover}.video-container{position:relative}.video-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#00000080;width:60px;height:60px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;pointer-events:none}.lightbox-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000000f2;display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.lightbox-content{max-width:90%;max-height:90%;display:flex;flex-direction:column;gap:15px}.lightbox-media{max-width:100%;max-height:80vh;border-radius:4px;box-shadow:0 0 50px #000}.lightbox-close{position:absolute;top:20px;right:20px;background:transparent;border:none;color:#fff;cursor:pointer;opacity:.7;transition:opacity .2s}.lightbox-close:hover{opacity:1}.lightbox-actions{display:flex;justify-content:center}.lightbox-btn{background:#ffffff1a;color:#fff;padding:10px 20px;border-radius:20px;text-decoration:none;display:flex;align-items:center;gap:8px;font-size:.9rem;transition:background .2s}.lightbox-btn:hover{background:#fff3}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-secondary);text-align:center;padding:40px}.empty-state-icon{width:120px;height:120px;background:#1b1f24;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:24px;color:var(--accent-color)}.empty-state h2{font-size:2rem;font-weight:300;margin-bottom:12px;color:#dee3e7}.empty-state p{max-width:400px;line-height:1.6}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#ffffff40}.file-attachment{background:#0003;padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,.1);margin-top:5px}.file-info{display:flex;align-items:center;gap:12px}.file-icon{width:40px;height:40px;background:#2a2f35;border-radius:6px;display:flex;align-items:center;justify-content:center;color:var(--accent-color)}.file-details{flex:1;min-width:0}.file-name{font-size:.85rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:4px}.file-download{font-size:.75rem;color:var(--accent-color);text-decoration:none;display:flex;align-items:center;gap:4px}.file-download:hover{text-decoration:underline}.audio-player{width:100%;height:36px;margin:5px 0}.message-link{color:var(--accent-color);text-decoration:underline;word-break:break-all}.message-link:hover{text-decoration:none}.login-container{height:100vh;width:100vw;display:flex;align-items:center;justify-content:center;background:#0b141a}.login-card{background:#111b21;padding:40px;border-radius:20px;width:100%;max-width:400px;text-align:center;box-shadow:0 10px 30px #00000080;border:1px solid rgba(255,255,255,.05)}.login-icon{width:80px;height:80px;background:var(--accent-color);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 24px}.login-card h2{font-size:1.5rem;margin-bottom:12px}.login-card p{color:var(--text-secondary);font-size:.9rem;margin-bottom:30px;line-height:1.5}.login-input{width:100%;background:#2a3942;border:1px solid transparent;padding:14px 16px;border-radius:10px;color:#fff;font-size:16px;margin-bottom:16px;outline:none;transition:all .2s}.login-input:focus{border-color:var(--accent-color)}.login-input.error{border-color:#f15c5c;animation:shake .5s}.login-button{width:100%;background:var(--accent-color);color:#fff;border:none;padding:14px;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s}.login-button:hover{background:var(--accent-hover)}.error-message{color:#f15c5c;font-size:.8rem;margin-bottom:16px}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}.search-highlight{color:var(--accent-color);font-weight:500}.message.highlighted{border:2px solid var(--accent-color);animation:pulse-highlight 2s infinite}@keyframes pulse-highlight{0%{box-shadow:0 0 #00a88466}70%{box-shadow:0 0 0 15px #00a88400}to{box-shadow:0 0 #00a88400}}.mobile-back-btn{display:none;background:transparent;border:none;color:var(--text-primary);margin-right:12px;cursor:pointer;padding:4px}@media(max-width:768px){.sidebar{width:100%;position:absolute;inset:0;z-index:20;transition:transform .3s ease}.chat-window{width:100%;position:absolute;inset:0;z-index:10}.mobile-chat-open .sidebar{transform:translate(-100%)}.mobile-back-btn{display:block}.message{max-width:85%}.empty-state{display:none}.chat-list{margin-bottom:20px}.chat-item{margin:4px 8px;padding:10px 12px}.chat-avatar{width:44px;height:44px}.chat-header{padding:0 12px}}@media(hover:none){.chat-item:hover{background-color:transparent}.chat-item:active{background-color:var(--sidebar-hover)}}.load-more-indicator{display:flex;justify-content:center;padding:10px;margin:10px 0;color:var(--text-secondary);font-size:.85rem;background-color:#0000000d;border-radius:8px;font-style:italic}.chat-item{margin-bottom:8px!important;border-radius:12px!important;border:1px solid rgba(255,255,255,.05)}.chat-item:last-child{margin-bottom:20px!important}.message-list{scroll-behavior:auto}.chat-search-bar{flex:1;display:flex;align-items:center;gap:12px;animation:fadeIn .2sease-out}.icon-btn{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:8px;border-radius:50%;transition:all .2s;display:flex;align-items:center;justify-content:center}.icon-btn:hover{background-color:#ffffff1a;color:var(--accent-color)}@keyframes fadeIn{0%{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}.load-more-indicator{text-align:center;padding:20px;color:var(--text-secondary);font-size:.9rem;display:flex;align-items:center;justify-content:center;gap:8px}.load-more-indicator:before{content:"";width:16px;height:16px;border:2px solid var(--text-secondary);border-top-color:transparent;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}