:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--bg-tertiary: #1a1a25;--bg-card: rgba(26, 26, 37, .7);--bg-glass: rgba(255, 255, 255, .03);--text-primary: #ffffff;--text-secondary: #a0a0b0;--text-muted: #606070;--accent-primary: #6366f1;--accent-secondary: #8b5cf6;--accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--border-color: rgba(255, 255, 255, .08);--border-glow: rgba(99, 102, 241, .3);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 20px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .5);--shadow-glow: 0 0 40px rgba(99, 102, 241, .15);--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--radius-sm: .375rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at 20% 20%,rgba(99,102,241,.08) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(139,92,246,.06) 0%,transparent 50%),radial-gradient(ellipse at 50% 50%,rgba(168,85,247,.04) 0%,transparent 70%);pointer-events:none;z-index:0}body:after{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background-image:linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);background-size:50px 50px;pointer-events:none;z-index:0}#app{position:relative;z-index:1;min-height:100vh}.section{display:none;min-height:100vh}.section.active{display:block}.container{max-width:1200px;margin:0 auto;padding:var(--space-xl)}.header{display:flex;justify-content:space-between;align-items:center;padding:var(--space-md) 0;margin-bottom:var(--space-2xl)}.logo{display:flex;align-items:center;gap:var(--space-md)}.logo-icon{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--accent-gradient);border-radius:var(--radius-lg);box-shadow:var(--shadow-glow)}.logo-icon svg{width:28px;height:28px;color:#fff}.logo-text{font-size:1.5rem;font-weight:700;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.security-badge{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);background:var(--bg-glass);border:1px solid var(--border-color);border-radius:var(--radius-full);font-size:.875rem;color:var(--success)}.badge-icon{font-size:1rem}.hero{display:flex;flex-direction:column;align-items:center;text-align:center;padding:var(--space-2xl) 0}.hero-content{max-width:800px}.hero-title{font-size:clamp(2.5rem,6vw,4rem);font-weight:800;line-height:1.1;margin-bottom:var(--space-lg)}.hero-title span{display:block}.gradient-text{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.25rem;color:var(--text-secondary);margin-bottom:var(--space-2xl)}.action-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--space-xl);margin-top:var(--space-xl)}.action-card{background:var(--bg-card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--space-xl);text-align:center;transition:all var(--transition-normal)}.action-card:hover{border-color:var(--border-glow);box-shadow:var(--shadow-glow);transform:translateY(-4px)}.card-icon{width:64px;height:64px;margin:0 auto var(--space-lg);display:flex;align-items:center;justify-content:center;background:var(--bg-glass);border:1px solid var(--border-color);border-radius:var(--radius-lg)}.card-icon svg{width:32px;height:32px;color:var(--accent-primary)}.action-card h3{font-size:1.5rem;font-weight:600;margin-bottom:var(--space-sm)}.action-card p{color:var(--text-secondary);margin-bottom:var(--space-lg)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-md) var(--space-xl);font-family:var(--font-sans);font-size:1rem;font-weight:500;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:var(--shadow-sm),0 0 20px #6366f133}.btn-primary:hover:not(:disabled){box-shadow:var(--shadow-md),0 0 30px #6366f166;transform:translateY(-2px)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover:not(:disabled){background:var(--bg-card);border-color:var(--accent-primary)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover:not(:disabled){color:var(--text-primary);background:var(--bg-glass)}.btn-icon{width:44px;height:44px;padding:0;background:var(--bg-glass);border:1px solid var(--border-color);border-radius:var(--radius-md)}.btn-icon svg{width:20px;height:20px}.btn-icon:hover:not(:disabled){background:var(--bg-tertiary);border-color:var(--accent-primary)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#dc2626}.join-input-group{display:flex;gap:var(--space-sm)}.join-input-group input{flex:1}input[type=text],textarea{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:var(--space-md);font-family:var(--font-mono);font-size:1rem;color:var(--text-primary);transition:all var(--transition-fast)}input[type=text]:focus,textarea:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #6366f11a}input[type=text]::placeholder,textarea::placeholder{color:var(--text-muted)}.security-features{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-lg);margin-top:var(--space-2xl);padding-top:var(--space-2xl);border-top:1px solid var(--border-color)}.feature{display:flex;align-items:center;gap:var(--space-sm);color:var(--text-secondary);font-size:.875rem}.feature-icon{font-size:1.25rem}.waiting-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:var(--space-xl)}.waiting-card{background:var(--bg-card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--space-2xl);text-align:center;max-width:500px;width:100%}.spinner{width:48px;height:48px;margin:0 auto var(--space-lg);border:3px solid var(--bg-tertiary);border-top-color:var(--accent-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.waiting-info{color:var(--text-secondary);margin-bottom:var(--space-md)}.share-link-container{display:flex;gap:var(--space-sm);margin-bottom:var(--space-lg)}.share-link-container input{flex:1;font-size:.875rem}.qr-code-container{margin-bottom:var(--space-lg)}.security-notice{display:flex;gap:var(--space-md);background:#f59e0b1a;border:1px solid rgba(245,158,11,.3);border-radius:var(--radius-lg);padding:var(--space-lg);text-align:left;max-width:500px}.notice-icon{font-size:1.5rem;flex-shrink:0}.notice-content strong{display:block;color:var(--warning);margin-bottom:var(--space-xs)}.notice-content p{color:var(--text-secondary);font-size:.875rem}.chat-container{display:flex;flex-direction:column;height:100vh}.chat-header{display:flex;justify-content:space-between;align-items:center;padding:var(--space-md) var(--space-lg);background:var(--bg-secondary);border-bottom:1px solid var(--border-color)}.chat-header-left,.chat-header-right{display:flex;align-items:center;gap:var(--space-md)}.connection-status{display:flex;align-items:center;gap:var(--space-sm)}.status-dot{width:10px;height:10px;background:var(--success);border-radius:50%;animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.connection-status.disconnected .status-dot{background:var(--danger);animation:none}.encryption-indicator{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-xs) var(--space-sm);background:#10b9811a;border:1px solid rgba(16,185,129,.3);border-radius:var(--radius-sm);font-size:.75rem;color:var(--success)}.lock-icon{width:14px;height:14px}.video-container{display:none;position:relative;background:var(--bg-primary);border-bottom:1px solid var(--border-color)}.video-container.active{display:block}.video-wrapper{position:relative;display:flex;justify-content:center;align-items:center;min-height:300px;max-height:50vh}#remote-video{width:100%;max-height:50vh;object-fit:contain;background:var(--bg-secondary)}#local-video{position:absolute;bottom:var(--space-md);right:var(--space-md);width:180px;border-radius:var(--radius-md);border:2px solid var(--border-color);background:var(--bg-secondary)}.video-controls{display:flex;justify-content:center;gap:var(--space-md);padding:var(--space-md);background:var(--bg-secondary)}.video-controls .btn-icon{width:56px;height:56px}.video-controls .btn-icon svg{width:24px;height:24px}.video-controls .btn-icon.muted{background:var(--danger);border-color:var(--danger)}.messages-container{flex:1;overflow-y:auto;padding:var(--space-lg);display:flex;flex-direction:column}.messages-list{flex:1;display:flex;flex-direction:column;gap:var(--space-md)}.message{max-width:70%;padding:var(--space-md) var(--space-lg);border-radius:var(--radius-lg);word-wrap:break-word}.message.sent{align-self:flex-end;background:var(--accent-gradient);color:#fff;border-bottom-right-radius:var(--space-xs)}.message.received{align-self:flex-start;background:var(--bg-tertiary);border-bottom-left-radius:var(--space-xs)}.message-time{display:block;font-size:.75rem;opacity:.7;margin-top:var(--space-xs)}.typing-indicator{display:none;align-items:center;gap:var(--space-sm);padding:var(--space-md);color:var(--text-secondary);font-size:.875rem}.typing-indicator.visible{display:flex}.typing-dots{display:flex;gap:4px}.typing-dots span{width:8px;height:8px;background:var(--text-muted);border-radius:50%;animation:typing-bounce 1.4s infinite ease-in-out}.typing-dots span:nth-child(1){animation-delay:-.32s}.typing-dots span:nth-child(2){animation-delay:-.16s}.typing-dots span:nth-child(3){animation-delay:0s}@keyframes typing-bounce{0%,80%,to{transform:scale(.8);opacity:.5}40%{transform:scale(1);opacity:1}}.message-input-container{padding:var(--space-md) var(--space-lg);background:var(--bg-secondary);border-top:1px solid var(--border-color)}.input-wrapper{display:flex;gap:var(--space-sm);align-items:flex-end}.input-wrapper textarea{flex:1;resize:none;min-height:44px;max-height:120px;padding:var(--space-md);font-family:var(--font-sans)}.btn-send{width:44px;height:44px;padding:0;flex-shrink:0}.btn-send svg{width:20px;height:20px}.input-info{margin-top:var(--space-sm);text-align:center}.encryption-note{font-size:.75rem;color:var(--text-muted)}.overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:#0a0a0fe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:100;justify-content:center;align-items:center}.overlay.visible{display:flex}.overlay-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--space-2xl);text-align:center;max-width:400px}.overlay-icon{width:64px;height:64px;margin:0 auto var(--space-lg);display:flex;align-items:center;justify-content:center;background:#ef44441a;border-radius:50%}.overlay-icon svg{width:32px;height:32px;color:var(--danger)}.overlay-card h2{margin-bottom:var(--space-sm)}.overlay-card p{color:var(--text-secondary);margin-bottom:var(--space-lg)}@media (max-width: 768px){.container{padding:var(--space-lg)}.header{flex-direction:column;gap:var(--space-md)}.hero-title{font-size:2rem}.action-cards{grid-template-columns:1fr}.message{max-width:85%}.chat-header{flex-direction:column;gap:var(--space-sm)}#local-video{width:120px}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--accent-primary)}::selection{background:#6366f14d;color:var(--text-primary)}