:root{--bg: #ffffff;--sidebar: #f0f2f5;--panel: #e6ebf0;--text: #000000;--muted: #707579;--accent: #3390ec;--accent-hover: #2b7fd4;--border: #dfe3e8;--bubble-out: #effdde;--bubble-in: #ffffff;--danger: #e53935;--shadow: rgba(0, 0, 0, .08)}[data-theme=dark]{--bg: #17212b;--sidebar: #0e1621;--panel: #242f3d;--text: #f5f5f5;--muted: #8b9bab;--accent: #5eb3f6;--accent-hover: #4aa3ea;--border: #2b3945;--bubble-out: #2b5278;--bubble-in: #182533;--danger: #ff6b6b;--shadow: rgba(0, 0, 0, .35)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}@supports (height: 100dvh){html,body,#root{height:100dvh}}body{font-family:Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--text)}button,input,textarea{font:inherit}button{cursor:pointer}.app-shell{height:100%;display:flex;flex-direction:column;min-height:0}@supports (height: 100dvh){.app-shell{height:100dvh;max-height:100dvh}}.login-page{min-height:100%;display:grid;place-items:center;background:linear-gradient(135deg,var(--sidebar),var(--panel));padding:24px}.login-card{width:min(420px,100%);background:var(--bg);border:1px solid var(--border);border-radius:16px;padding:28px;box-shadow:0 12px 40px var(--shadow)}.login-card h1{margin:0 0 8px;font-size:28px}.login-card p{margin:0 0 20px;color:var(--muted)}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field label{font-size:13px;color:var(--muted)}.field input{border:1px solid var(--border);border-radius:10px;padding:10px 12px;background:var(--sidebar);color:var(--text)}.field input:focus{outline:2px solid color-mix(in srgb,var(--accent) 35%,transparent);border-color:var(--accent)}.btn{border:none;border-radius:10px;padding:10px 16px;background:var(--accent);color:#fff;font-weight:600}.btn:hover{background:var(--accent-hover)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:transparent;color:var(--accent);border:1px solid var(--border)}.btn-danger{background:var(--danger)}.error-text{color:var(--danger);font-size:13px;margin-top:8px}.messenger{display:grid;grid-template-columns:340px 1fr;height:100%;min-height:0;overflow:hidden}.sidebar{background:var(--sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;min-width:0}.sidebar-header{padding:14px 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.sidebar-header h2{margin:0;font-size:18px}.sidebar-actions{display:flex;gap:6px}.icon-btn{width:36px;height:36px;border:none;border-radius:50%;background:transparent;color:var(--muted);display:grid;place-items:center}.icon-btn:hover{background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent)}.search-box{margin:10px 12px;border:none;border-radius:10px;padding:10px 12px;background:var(--panel);color:var(--text)}.chat-list{overflow:auto;flex:1}.chat-item{display:flex;gap:12px;padding:12px 16px;cursor:pointer;border-bottom:1px solid color-mix(in srgb,var(--border) 60%,transparent)}.chat-item:hover,.chat-item.active{background:color-mix(in srgb,var(--accent) 10%,transparent)}.avatar{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;flex-shrink:0}.chat-item-body{min-width:0;flex:1}.chat-item-title-row{display:flex;align-items:center;justify-content:space-between;gap:8px}.chat-item-title{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.chat-unread-badge{flex-shrink:0;min-width:20px;height:20px;padding:0 6px;border-radius:10px;background:var(--accent);color:#fff;font-size:11px;font-weight:700;display:grid;place-items:center}.chat-item-preview{color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-panel{display:flex;flex-direction:column;min-width:0;min-height:0;height:100%;overflow:hidden;background:var(--panel)}.chat-header{padding:12px 16px;padding-top:max(12px,env(safe-area-inset-top));background:var(--sidebar);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px;flex-shrink:0}.chat-header-info h3{margin:0;font-size:16px}.chat-header-info p{margin:2px 0 0;font-size:13px;color:var(--accent)}.chat-header-main{display:flex;align-items:center;gap:10px;min-width:0;flex:1}.chat-header-info{min-width:0}.chat-header-info h3{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-back-btn{display:none;font-size:20px;flex-shrink:0}.chat-header-actions{display:flex;align-items:center;gap:4px}.chat-e2e-label{color:var(--muted);font-size:13px;margin-left:4px}.call-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30;background:#000000b8;display:grid;place-items:center;padding:16px}.call-card{width:min(520px,100%);background:var(--bg);border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:0 16px 48px var(--shadow);display:flex;flex-direction:column;gap:20px}.call-header{text-align:center}.call-header h3{margin:0 0 6px;font-size:20px}.call-header p{margin:0;color:var(--muted);font-size:14px}.call-participants{margin-top:4px!important;font-size:13px!important}.call-media{display:flex;justify-content:center}.call-audio-icon{font-size:64px;line-height:1;opacity:.85}.call-video-grid{position:relative;width:100%;min-height:220px;display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}.call-remote-video{width:100%;max-height:280px;border-radius:12px;background:#000;object-fit:cover}.call-video-placeholder{grid-column:1 / -1;min-height:220px;border-radius:12px;background:var(--panel);display:grid;place-items:center;color:var(--muted);font-size:14px}.call-local-video{position:absolute;right:12px;bottom:12px;width:120px;height:90px;border-radius:10px;background:#000;object-fit:cover;border:2px solid var(--border);box-shadow:0 4px 16px var(--shadow)}.call-actions{display:flex;gap:12px;justify-content:center}.call-btn-accept{min-width:120px}.call-hidden-audio{display:none}.messages{flex:1;min-height:0;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:8px;-webkit-overflow-scrolling:touch}.message-row{display:flex}.message-row.outgoing{justify-content:flex-end}.bubble{max-width:min(70%,560px);padding:8px 12px;border-radius:14px;background:var(--bubble-in);box-shadow:0 1px 2px var(--shadow);word-break:break-word}.message-row.outgoing .bubble{background:var(--bubble-out)}.bubble-meta{display:flex;align-items:center;justify-content:flex-end;gap:6px;margin-top:4px}.bubble-meta time{font-size:11px;color:var(--muted)}.msg-status{font-size:11px;color:var(--muted);line-height:1}.msg-status.read,.bubble a{color:var(--accent)}.composer{padding:12px 16px;padding-bottom:max(12px,env(safe-area-inset-bottom));background:var(--sidebar);border-top:1px solid var(--border);display:flex;gap:8px;align-items:flex-end;flex-shrink:0}.composer textarea{flex:1;min-width:0;resize:none;min-height:42px;max-height:120px;border:1px solid var(--border);border-radius:12px;padding:10px 12px;background:var(--bg);color:var(--text)}.composer .btn{flex-shrink:0}.empty-state{flex:1;display:grid;place-items:center;color:var(--muted)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:grid;place-items:center;z-index:20;padding:16px}.modal{width:min(480px,100%);max-height:80vh;overflow:auto;background:var(--bg);border-radius:14px;padding:20px;border:1px solid var(--border)}.modal h3{margin:0 0 16px}.user-row{display:flex;align-items:center;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border)}.tabs{display:flex;gap:8px;margin-bottom:12px}.tab{flex:1;padding:8px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text)}.tab.active{background:color-mix(in srgb,var(--accent) 15%,transparent);border-color:var(--accent);color:var(--accent)}.typing-indicator{padding:0 16px 8px;font-size:13px;color:var(--muted);flex-shrink:0}@media(max-width:800px){.messenger{grid-template-columns:1fr;height:100dvh;max-height:100dvh}.sidebar.hidden-mobile{display:none}.chat-panel:has(.empty-state){display:none}.chat-panel:not(:has(.empty-state)){display:flex;min-height:0;height:100%}.chat-back-btn{display:grid}.composer .btn{padding:10px 12px;font-size:14px}}