:root{--bg-primary: #1a1a2e;--bg-secondary: #16213e;--bg-tertiary: #0f3460;--bg-bubble-sent: #6366f1;--bg-bubble-recv: #2a2a3e;--bg-input: #2a2a3e;--text-primary: #e4e4e7;--text-secondary: #a1a1aa;--text-accent: #818cf8;--accent: #6366f1;--accent-light: #818cf8;--danger: #ef4444;--success: #22c55e;--border: #3f3f46;--radius: 16px;--radius-sm: 8px;--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-top: env(safe-area-inset-top, 0px)}*{margin:0;padding:0;box-sizing:border-box}[hidden]{display:none!important}html,body{height:100dvh;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);font-size:16px;-webkit-text-size-adjust:100%}.screen{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column}.login-container{margin:auto;padding:2rem;text-align:center;width:100%;max-width:320px}.login-logo{font-size:4rem;margin-bottom:.5rem}.login-container h1{margin-bottom:1.5rem;font-weight:600;color:var(--text-primary)}#login-form input{display:block;width:100%;padding:.75rem 1rem;margin-bottom:.75rem;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-input);color:var(--text-primary);font-size:1rem;outline:none}#login-form input:focus{border-color:var(--accent)}.btn-primary{display:block;width:100%;padding:.75rem;border:none;border-radius:var(--radius-sm);background:var(--accent);color:#fff;font-size:1rem;font-weight:600;cursor:pointer;transition:opacity .2s}.btn-primary:active{opacity:.8}.error-text{color:var(--danger);font-size:.875rem;margin-top:.5rem}#chat-header{display:flex;align-items:center;justify-content:space-between;padding:.5rem 1rem;padding-top:calc(.5rem + var(--safe-top));background:var(--bg-secondary);border-bottom:1px solid var(--border);min-height:56px;flex-shrink:0}.header-left{display:flex;align-items:center;gap:.75rem}.avatar{width:40px;height:40px;border-radius:50%;background:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:600;color:var(--accent-light);flex-shrink:0;overflow:hidden}.avatar img{width:100%;height:100%;object-fit:cover}.header-right{display:flex;align-items:center;gap:.25rem}.header-info{display:flex;flex-direction:column}#partner-name{font-weight:600;font-size:1rem}.status-text{font-size:.75rem;color:var(--text-secondary)}.status-text.online{color:var(--success)}.btn-icon{background:none;border:none;color:var(--text-secondary);font-size:1.25rem;cursor:pointer;padding:.5rem;border-radius:50%;transition:background .2s;flex-shrink:0}.btn-icon svg{display:block}.btn-icon:active{background:#ffffff1a}#messages-container{flex:1;overflow-y:auto;overflow-x:hidden;padding:.5rem;scroll-behavior:auto;-webkit-overflow-scrolling:touch}#messages-list{display:flex;flex-direction:column;min-height:100%;justify-content:flex-end}.message{display:flex;flex-direction:column;max-width:80%;margin-top:3px;animation:fadeIn .15s ease}.message:first-child{margin-top:0}.message.gap-large{margin-top:5px}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.message.sent{align-self:flex-end}.message.received{align-self:flex-start}.bubble{padding:.5rem .75rem;border-radius:var(--radius);word-wrap:break-word;overflow-wrap:break-word;position:relative;line-height:1.4}.message.sent .bubble{background:var(--bg-bubble-sent)}.message.received .bubble{background:var(--bg-bubble-recv)}.message.sent.group-first .bubble{border-bottom-right-radius:4px}.message.sent.group-middle .bubble{border-top-right-radius:4px;border-bottom-right-radius:4px}.message.sent.group-last .bubble{border-top-right-radius:4px}.message.received.group-first .bubble{border-bottom-left-radius:4px}.message.received.group-middle .bubble{border-top-left-radius:4px;border-bottom-left-radius:4px}.message.received.group-last .bubble{border-top-left-radius:4px}.bubble-meta{display:flex;align-items:center;justify-content:flex-end;gap:4px;margin-top:2px;font-size:.7rem;color:#ffffff80}.message.received .bubble-meta{color:var(--text-secondary)}.read-check{display:inline-flex;align-items:center;color:#ffffffb3}.read-check svg{display:block}.read-check.read{color:var(--accent-light)}.bubble-reply{background:#0003;border-left:3px solid var(--accent-light);border-radius:4px;padding:4px 8px;margin-bottom:4px;font-size:.8rem;cursor:pointer}.bubble-reply-name{color:var(--accent-light);font-weight:600;font-size:.75rem}.bubble-reply-text{color:var(--text-secondary);display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bubble-image{max-width:280px;border-radius:var(--radius-sm);cursor:pointer;display:block}.bubble-image img{width:100%;border-radius:var(--radius-sm);display:block}.bubble-voice{display:flex;align-items:center;gap:.5rem;min-width:200px}.voice-play-btn{width:36px;height:36px;border-radius:50%;background:#ffffff26;border:none;color:#fff;font-size:1rem;cursor:pointer;flex-shrink:0;display:flex;align-items:center;justify-content:center}.voice-waveform{flex:1;height:28px;display:flex;align-items:center;gap:2px}.voice-waveform .bar{width:3px;background:#fff6;border-radius:2px;transition:background .1s}.voice-waveform .bar.active{background:#fff}.voice-duration{font-size:.75rem;color:#fff9;white-space:nowrap}.bubble-video{width:200px;height:200px;border-radius:50%;overflow:hidden;cursor:pointer;position:relative;border:3px solid var(--accent)}.bubble-video video{width:100%;height:100%;object-fit:cover}.bubble-video .play-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#0000004d;font-size:2rem}.reply-preview{display:flex;align-items:center;padding:.5rem 1rem;background:var(--bg-secondary);border-top:1px solid var(--border);border-left:3px solid var(--accent);gap:.5rem}.reply-preview-content{flex:1;overflow:hidden}.reply-preview-name{color:var(--accent-light);font-weight:600;font-size:.8rem;display:block}.reply-preview-text{color:var(--text-secondary);font-size:.8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:block}#media-preview{display:flex;align-items:center;padding:.5rem 1rem;background:var(--bg-secondary);border-top:1px solid var(--border);gap:.5rem}#media-preview-content img{height:60px;border-radius:var(--radius-sm)}#input-area{display:flex;align-items:flex-end;padding:.5rem;padding-bottom:calc(.5rem + var(--safe-bottom));background:var(--bg-secondary);border-top:1px solid var(--border);gap:.25rem;flex-shrink:0}#message-input{flex:1;resize:none;border:none;background:var(--bg-input);color:var(--text-primary);padding:.625rem 1rem;border-radius:20px;font-size:1rem;font-family:inherit;outline:none;max-height:120px;line-height:1.4}#message-input::placeholder{color:var(--text-secondary)}#voice-recording{position:absolute;bottom:0;left:0;right:0;display:none;align-items:center;gap:1rem;padding:.75rem 1rem;padding-bottom:calc(.75rem + var(--safe-bottom));background:var(--bg-secondary);border-top:1px solid var(--border);z-index:10}#voice-recording:not([hidden]){display:flex}#video-recording{position:absolute;top:0;right:0;bottom:0;left:0;display:none;flex-direction:column;align-items:center;justify-content:center;gap:1rem;background:#000c;z-index:20}#video-recording:not([hidden]){display:flex}.recording-center{display:flex;align-items:center;gap:.5rem}.recording-send-hint{color:var(--accent-light)}.recording-pulse{width:12px;height:12px;border-radius:50%;background:var(--danger);animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.3)}}.recording-hint{color:var(--text-secondary);font-size:.8rem}.video-preview-container{width:200px;height:200px;position:relative}.video-preview-container video{width:100%;height:100%;border-radius:50%;object-fit:cover}.progress-ring{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;transform:rotate(-90deg)}.progress-ring-bg{fill:none;stroke:var(--border);stroke-width:4}.progress-ring-fill{fill:none;stroke:var(--accent);stroke-width:4;stroke-linecap:round;stroke-dasharray:339.292;stroke-dashoffset:339.292;transition:stroke-dashoffset 1s linear}.video-controls{display:flex;flex-direction:column;align-items:center;gap:.5rem}.btn-record-stop{width:48px;height:48px;border-radius:50%;background:var(--danger);border:none;color:#fff;font-size:1.25rem;cursor:pointer}.lightbox{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000f2;z-index:100;display:none;align-items:center;justify-content:center}.lightbox:not([hidden]){display:flex}.lightbox-close{position:absolute;top:1rem;right:1rem;color:#fff;font-size:1.5rem;z-index:101}#lightbox-img{max-width:95%;max-height:95%;object-fit:contain}.reconnecting{position:absolute;top:calc(56px + var(--safe-top));left:0;right:0;padding:.25rem;background:var(--danger);color:#fff;text-align:center;font-size:.8rem;z-index:50}.install-banner{position:fixed;bottom:0;left:0;right:0;padding:1rem;padding-bottom:calc(1rem + var(--safe-bottom));background:var(--bg-tertiary);display:none;align-items:center;justify-content:space-between;font-size:.875rem;z-index:60}.install-banner:not([hidden]){display:flex}.install-banner-text{cursor:pointer;flex:1}.install-banner-text:active{opacity:.7}.upload-progress{height:3px;background:#fff3;border-radius:2px;margin-top:4px;overflow:hidden}.upload-progress-bar{height:100%;background:var(--accent-light);border-radius:2px;transition:width .2s}.message.highlight{background:#6366f11a;border-radius:var(--radius-sm)}.bubble a{color:inherit;text-decoration:underline;text-underline-offset:2px}#messages-container::-webkit-scrollbar{width:4px}#messages-container::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.date-separator{text-align:center;padding:.5rem 0;font-size:.75rem;color:var(--text-secondary)}.date-separator span{background:var(--bg-secondary);padding:.25rem .75rem;border-radius:10px}