:root{--bg-primary: #000000;--bg-secondary: #000000;--bg-tertiary: #0c0c0c;--bg-card: #0c0c0c;--bg-elevated: #1a1a1a;--accent-primary: #ffffff;--accent-secondary: #888888;--accent-success: #ffffff;--accent-warning: #888888;--accent-error: #900000;--text-primary: #ffffff;--text-secondary: #888888;--text-muted: #484e50;--text-inverse: #000000;--border-color: #333333;--border-subtle: rgba(255, 255, 255, .05);--gradient-primary: linear-gradient(135deg, #ffffff 0%, #888888 100%);--gradient-glow: linear-gradient(135deg, rgba(255, 255, 255, .1) 0%, rgba(136, 136, 136, .1) 100%);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .2);--shadow-md: 0 4px 16px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .4);--shadow-glow: 0 0 40px rgba(122, 162, 247, .15);--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .35s ease;--font-family: "TASA Orbiter", sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-md: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.5rem;--font-size-2xl: 2rem}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;height:100dvh;overflow:hidden}body{font-family:var(--font-family);font-size:var(--font-size-md);background:var(--bg-primary);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}input,button{font-family:inherit;font-size:inherit}input,textarea{caret-color:var(--text-primary);caret-shape:block}.hidden{display:none!important}.glass{background:#0c0c0ccc;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-subtle)}.mobile-only{display:none}@media(max-width:768px){.mobile-only{display:flex}.desktop-only{display:none}}.screen{display:none;height:100%;width:100%}.screen.active{display:flex}.login-screen{display:flex;height:100vh;height:100dvh;width:100%;background:var(--bg-primary);background-image:radial-gradient(ellipse at 20% 80%,rgba(255,255,255,.03) 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,rgba(255,255,255,.03) 0%,transparent 50%);align-items:center;justify-content:center}.login-header{text-align:center;margin-bottom:var(--space-xl)}.login-icon{font-size:3rem;margin-bottom:var(--space-sm);animation:float 3s ease-in-out infinite}.login-header h1{font-size:var(--font-size-2xl);font-family:Doto,sans-serif;font-optical-sizing:auto;font-weight:700;font-style:normal;font-variation-settings:"ROND" 0;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:var(--space-xs)}.security-info{margin-top:var(--space-lg);text-align:center}.security-badge{display:inline-flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);background:var(--bg-tertiary);border-radius:var(--radius-full);font-size:var(--font-size-sm);color:var(--text-muted)}.chat-screen{display:flex;height:100%;height:100dvh;width:100%;background:var(--bg-primary)}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0}.chat-header-info{flex:1}.chat-header-info h2{font-size:var(--font-size-lg);font-weight:600;color:var(--text-primary)}.chat-header-info span{font-size:var(--font-size-xs);color:var(--text-muted)}.menu-btn{display:none;background:transparent;border:none;font-size:1.5rem;color:var(--text-secondary);cursor:pointer}@media(max-width:768px){.menu-btn{display:block}}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;background:var(--bg-primary);color:var(--text-muted)}.loading-spinner{width:40px;height:40px;border:3px solid var(--border-color);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:var(--space-md)}.new-chat-section{padding:var(--space-md);border-bottom:1px solid var(--border-color)}.new-chat-section{display:flex;gap:var(--space-sm)}.new-chat-section input{flex:1;height:48px;padding:0 var(--space-md);background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);transition:var(--transition-fast)}.new-chat-btn{width:48px;height:48px;min-width:48px;padding:0;background:var(--accent-primary);color:var(--text-inverse);border:none;border-radius:var(--radius-md);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition-fast)}.new-chat-btn:disabled{opacity:.3;cursor:not-allowed}.new-chat-section input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #ffffff1a}.new-chat-section input::placeholder{color:var(--text-muted)}.close-sidebar-btn{display:none;background:transparent;border:none;font-size:1.25rem;color:var(--text-secondary);cursor:pointer}@media(max-width:768px){.close-sidebar-btn{display:block}}.logout-btn{width:100%;padding:var(--space-md);background:transparent;border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-secondary);cursor:pointer;transition:var(--transition-fast)}.logout-btn:hover{background:var(--accent-error);border-color:var(--accent-error);color:var(--text-inverse)}.attach-btn,.camera-btn,.send-btn{width:48px;height:48px;min-width:48px;min-height:48px;padding:0;border-radius:var(--radius-md);border:none;cursor:pointer;transition:var(--transition-fast);flex-shrink:0}.attach-btn,.camera-btn{background:transparent;border:2px solid var(--border-color);color:var(--text-secondary)}.attach-btn:hover:not(:disabled),.camera-btn:hover:not(:disabled){background:var(--bg-elevated);color:var(--text-primary);border-color:var(--accent-primary)}.send-btn{background:var(--gradient-primary);color:var(--text-inverse)}.send-btn:hover:not(:disabled){opacity:.85}.attach-btn:disabled,.camera-btn:disabled,.send-btn:disabled{opacity:.5;cursor:not-allowed}.empty-chats{text-align:center;padding:var(--space-xl);color:var(--text-muted)}#chatPeerName{transition:var(--transition-normal)}#chatPeerName.online{color:var(--text-primary);text-shadow:0 0 10px rgba(255,255,255,.4);animation:peerPulse 2s infinite}#chatPeerName.offline{color:var(--text-muted);opacity:.6}#chatPeerName.unknown{color:var(--text-muted);opacity:.4}@keyframes peerPulse{0%{opacity:1}50%{opacity:.7}to{opacity:1}}.login-container{width:100%;max-width:420px;padding:var(--space-md)}.login-card{padding:var(--space-2xl);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg),var(--shadow-glow)}.logo{text-align:center;margin-bottom:var(--space-xl)}.logo-icon{font-size:3rem;margin-bottom:var(--space-sm);animation:float 3s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.logo h1{font-size:var(--font-size-2xl);font-weight:700;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:var(--space-xs)}.tagline{color:var(--text-muted);font-size:var(--font-size-sm)}.login-form{display:flex;flex-direction:column;gap:var(--space-md)}.input-group{position:relative}.input-group input{width:100%;padding:var(--space-md) var(--space-md) var(--space-md) var(--space-2xl);background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);transition:var(--transition-fast)}.input-group input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #ffffff1a}.input-group input::placeholder{color:var(--text-muted)}.input-icon{position:absolute;left:var(--space-md);top:50%;transform:translateY(-50%);color:var(--text-muted);font-weight:600}.status-message{text-align:center;font-size:var(--font-size-sm);color:var(--text-muted);margin-top:var(--space-md);min-height:1.5em}.status-message.error{color:var(--accent-error)}.status-message.success{color:var(--accent-success)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-md) var(--space-lg);border:none;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:var(--transition-fast)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--gradient-primary);color:var(--text-inverse);box-shadow:var(--shadow-sm)}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-loader{width:20px;height:20px;border:2px solid transparent;border-top-color:currentColor;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes crypto-pulse{0%{opacity:1;text-shadow:0 0 0px rgba(255,255,255,.5)}50%{opacity:.7;text-shadow:0 0 12px rgba(255,255,255,.8),0 0 24px rgba(122,162,247,.4)}to{opacity:1;text-shadow:0 0 0px rgba(255,255,255,.5)}}.animating-crypto{animation:crypto-pulse 1.2s ease-in-out infinite}.icon-btn{display:flex;align-items:center;justify-content:center;width:48px;height:48px;min-width:48px;min-height:48px;background:transparent;border:none;border-radius:var(--radius-md);color:var(--text-secondary);cursor:pointer;transition:var(--transition-fast)}.icon-btn:hover{background:var(--bg-elevated);color:var(--text-primary)}.icon-btn svg{width:20px;height:20px}#chatScreen{background:var(--bg-primary)}.sidebar{width:320px;height:100%;display:flex;flex-direction:column;background:var(--bg-secondary);border-right:1px solid var(--border-color)}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-lg);border-bottom:1px solid var(--border-color)}.sidebar-header h1{font-size:var(--font-size-2xl);font-family:Doto,sans-serif;font-optical-sizing:auto;font-weight:700;font-style:normal;font-variation-settings:"ROND" 0;color:var(--accent-primary)}.chat-list{flex:1;overflow-y:auto;padding:var(--space-sm)}.chat-item{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition-fast)}.chat-item:hover{background:var(--bg-tertiary)}.chat-item.active{background:var(--bg-elevated)}.chat-item-avatar{width:44px;height:44px;border-radius:var(--radius-full);background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;font-weight:600;color:var(--text-inverse);font-size:var(--font-size-lg);flex-shrink:0}.chat-item-info{flex:1;min-width:0}.chat-item-name{font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-item-preview{font-size:var(--font-size-sm);color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-item-unread{width:10px;height:10px;background:var(--accent-primary);border-radius:var(--radius-full);flex-shrink:0}.new-chat-box{padding:var(--space-md);border-top:1px solid var(--border-color)}.new-chat-box input{width:100%;padding:var(--space-md);background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);transition:var(--transition-fast)}.new-chat-box input:focus{outline:none;border-color:var(--accent-primary)}.new-chat-box input::placeholder{color:var(--text-muted)}.sidebar-footer{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md) var(--space-lg);border-top:1px solid var(--border-color);background:var(--bg-tertiary)}.footer-user{font-size:var(--font-size-sm);color:var(--text-muted)}.footer-logout{font-size:var(--font-size-sm);color:var(--text-muted);background:none;border:none;cursor:pointer;padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-sm);transition:var(--transition-fast)}.footer-logout:hover{color:var(--accent-error);background:#f7768e1a}.import-identity-btn{background:none;border:none;cursor:pointer;color:var(--text-muted);font-size:var(--font-size-sm);margin-top:var(--space-sm);padding:var(--space-xs) 0;text-decoration:underline;text-underline-offset:3px}.import-identity-btn:hover{color:var(--text-primary)}.export-identity-btn{background:none;border:none;cursor:pointer;color:var(--text-muted);padding:var(--space-xs);border-radius:var(--radius-sm);display:flex;align-items:center;transition:var(--transition-fast)}.export-identity-btn:hover{color:var(--text-primary);background:#ffffff14}.icon-btn.attach-btn,.icon-btn.camera-btn{border:2px solid var(--border-color);color:var(--text-secondary)}.icon-btn.attach-btn:hover,.icon-btn.camera-btn:hover{background:var(--bg-elevated);color:var(--text-primary);border-color:var(--accent-primary)}.icon-btn.send-btn{background:var(--gradient-primary);color:var(--text-inverse);border:none}.icon-btn.send-btn:hover:not(:disabled){opacity:.85}.icon-btn:disabled{opacity:.4;cursor:not-allowed}.spinner-small{width:16px;height:16px;border:2px solid transparent;border-top-color:currentColor;border-radius:50%;animation:spin .8s linear infinite}.chat-area{flex:1;display:flex;flex-direction:column;height:100%;min-width:0}.chat-header{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);background:var(--bg-secondary);border-bottom:1px solid var(--border-color)}.chat-title{flex:1}.chat-title h3{font-size:var(--font-size-lg);font-weight:600;color:var(--text-primary)}.chat-status{font-size:var(--font-size-xs);color:var(--text-muted)}.header-actions{display:flex;align-items:center;gap:var(--space-sm)}.messages-container{flex:1;overflow-y:auto;padding:var(--space-lg) var(--space-md);display:flex;flex-direction:column;gap:var(--space-md)}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted)}.empty-icon{font-size:4rem;margin-bottom:var(--space-md);opacity:.5}.day-label{display:flex;align-items:center;gap:var(--space-sm);font-size:var(--font-size-xs);color:var(--text-muted);margin:var(--space-md) 0 var(--space-sm);width:100%;align-self:stretch}.day-label:before,.day-label:after{content:"";flex:1;height:1px;background:var(--border-color)}.message-time{display:block;font-size:.65rem;text-align:right;margin-top:2px}.message.sent .message-time{color:#0006}.message.received .message-time{color:#ffffff59}.message-row{display:flex;flex-direction:column}.message-row.sent{align-items:flex-end}.message-row.received{align-items:flex-start}.message{display:flex;flex-direction:column;max-width:75%;animation:messageIn .2s ease-out}@keyframes messageIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.sent{align-self:flex-end;margin-left:auto}.message.received{align-self:flex-start}.message-bubble{padding:var(--space-sm) var(--space-md);border-radius:var(--radius-lg);word-wrap:break-word;line-height:1.4;width:fit-content;max-width:100%}.message.sent .message-bubble{background:var(--accent-primary);color:var(--text-inverse);border-bottom-right-radius:var(--radius-sm)}.message.received .message-bubble{background:var(--bg-elevated);color:var(--text-primary);border-bottom-left-radius:var(--radius-sm)}.message-meta{display:flex;align-items:center;gap:var(--space-xs);margin-top:var(--space-xs);font-size:var(--font-size-xs);color:var(--text-muted)}.message.sent .message-meta{justify-content:flex-end}.input-area{padding:var(--space-md) var(--space-lg) var(--space-xl);padding-bottom:calc(var(--space-xl) + env(safe-area-inset-bottom));background:var(--bg-secondary);border-top:1px solid var(--border-color)}.message-form{display:flex;gap:var(--space-sm);align-items:stretch}.message-form input{flex:1;height:48px;padding:0 var(--space-md);background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);transition:var(--transition-fast)}.message-form input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #ffffff1a}.message-form input::placeholder{color:var(--text-muted)}.message-form input:disabled{opacity:.5}.btn-send{width:48px;height:48px;padding:0;border-radius:var(--radius-md);background:var(--gradient-primary);border:none;color:var(--text-inverse);cursor:pointer;transition:var(--transition-fast)}.btn-send:hover:not(:disabled){transform:scale(1.05)}.btn-send:disabled{opacity:.5;cursor:not-allowed}.btn-send svg{width:20px;height:20px}.btn-attach{width:48px;height:48px;padding:0;border-radius:var(--radius-md);background:transparent;border:2px solid var(--border-color);color:var(--text-secondary);cursor:pointer;transition:var(--transition-fast)}.btn-attach:hover:not(:disabled){background:var(--bg-elevated);color:var(--text-primary);border-color:var(--accent-primary)}.btn-attach:disabled{opacity:.5;cursor:not-allowed}.btn-attach svg{width:20px;height:20px}.message-attachment{margin-top:var(--space-xs);max-width:100%}.message-attachment img{max-width:100%;max-height:300px;border-radius:var(--radius-md);display:block}.message-attachment video{max-width:100%;max-height:300px;border-radius:var(--radius-md);display:block}.message-attachment audio{width:100%;max-width:300px}.message-attachment .file-info{padding:var(--space-sm) var(--space-md);background:#0003;border-radius:var(--radius-md);display:flex;align-items:center;gap:var(--space-sm)}.message-attachment .file-icon{font-size:1.5rem}.message-attachment .file-name{flex:1;font-size:var(--font-size-sm);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.message-attachment .file-size{font-size:var(--font-size-xs);color:var(--text-muted)}.message-attachment .download-link{display:block;margin-top:var(--space-xs);font-size:var(--font-size-xs);color:var(--accent-primary);text-decoration:none;opacity:.8;transition:var(--transition-fast)}.message-attachment .download-link:hover{opacity:1;text-decoration:underline}.message-attachment .file-download{text-decoration:none;color:inherit;display:block}.message-attachment .file-download:hover .file-info{background:#ffffff1a}.message-attachment .download-icon{font-size:1rem;opacity:.7}.message-attachment .file-download:hover .download-icon{opacity:1}.modal{position:fixed;inset:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:200}.modal.hidden{display:none}.modal-content{background:var(--bg-card);border-radius:var(--radius-xl);padding:var(--space-lg);max-width:500px;width:90%;box-shadow:var(--shadow-lg)}.webcam-modal{max-width:600px}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-md)}.modal-header h3{color:var(--text-primary);font-size:var(--font-size-lg)}.webcam-container{position:relative;background:#000;border-radius:var(--radius-md);overflow:hidden;margin-bottom:var(--space-md)}.webcam-container video{width:100%;display:block;transform:scaleX(-1)}.modal-actions{display:flex;gap:var(--space-sm);justify-content:center}.btn-secondary{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover:not(:disabled){background:var(--bg-tertiary)}@media(max-width:768px){.sidebar{position:fixed;top:0;left:0;z-index:100;width:100%;max-width:100%;height:100%;transform:translate(-100%);transition:transform var(--transition-normal)}.sidebar.open{transform:translate(0)}.sidebar-overlay{position:fixed;inset:0;background:#00000080;z-index:99;opacity:0;visibility:hidden;transition:var(--transition-normal)}.sidebar-overlay.visible{opacity:1;visibility:visible}.chat-area{width:100%}.message{max-width:85%}.login-card{padding:var(--space-xl)}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg-elevated);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--border-color)}@supports (padding: env(safe-area-inset-bottom)){.input-area,.sidebar-footer{padding-bottom:calc(var(--space-md) + env(safe-area-inset-bottom))}}