:root{--bg-dark: #0a0d14;--bg-card: rgba(18, 23, 37, .75);--bg-card-hover: rgba(28, 36, 56, .85);--bg-accent: rgba(99, 102, 241, .15);--primary: #6366f1;--primary-hover: #4f46e5;--primary-glow: rgba(99, 102, 241, .4);--secondary: #ec4899;--secondary-glow: rgba(236, 72, 153, .4);--accent-cyan: #06b6d4;--accent-green: #10b981;--accent-red: #ef4444;--text-main: #f3f4f6;--text-muted: #9ca3af;--text-dim: #6b7280;--border: rgba(255, 255, 255, .08);--border-glow: rgba(99, 102, 241, .3);--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-full: 9999px;--font-heading: "Outfit", sans-serif;--font-body: "Inter", sans-serif;--shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, .3);--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .5), 0 8px 10px -6px rgba(0, 0, 0, .5);--shadow-glow: 0 0 20px rgba(99, 102, 241, .35)}*{margin:0;padding:0;box-sizing:border-box}html,body{width:100vw;height:100vh;height:100dvh;overflow:hidden;font-family:var(--font-body);background:var(--bg-dark);color:var(--text-main);background-image:radial-gradient(circle at 15% 15%,rgba(99,102,241,.12) 0%,transparent 40%),radial-gradient(circle at 85% 85%,rgba(236,72,153,.1) 0%,transparent 40%),radial-gradient(circle at 50% 50%,rgba(6,182,212,.08) 0%,transparent 50%)}button{font-family:inherit;cursor:pointer;border:none;outline:none;transition:all .2s ease}input,textarea{font-family:inherit;outline:none}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(255,255,255,.15);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.3)}.app-container{display:flex;width:100vw;height:100vh;height:100dvh;position:relative;overflow:hidden}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(5,7,13,.88);backdrop-filter:blur(16px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px;animation:fadeIn .3s ease}.login-card{width:100%;max-width:440px;padding:32px 28px;border-radius:var(--radius-lg);background:linear-gradient(145deg,rgba(24,30,48,.95),rgba(14,18,31,.98));border:1px solid var(--border-glow);box-shadow:var(--shadow-glow),var(--shadow-lg);text-align:center}.brand-badge{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;background:var(--bg-accent);border:1px solid var(--border-glow);border-radius:var(--radius-full);margin-bottom:16px;color:#a5b4fc;font-weight:600;font-family:var(--font-heading);font-size:.9rem}.login-title{font-family:var(--font-heading);font-size:1.8rem;font-weight:700;background:linear-gradient(135deg,#fff,#a5b4fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px}.login-subtitle{color:var(--text-muted);font-size:.88rem;margin-bottom:24px}.input-group{position:relative;margin-bottom:18px;text-align:left}.input-label{display:block;font-size:.8rem;font-weight:600;color:var(--text-muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em}.input-wrapper{position:relative;display:flex;align-items:center}.input-icon{position:absolute;left:14px;color:var(--text-dim)}.custom-input{width:100%;padding:12px 16px 12px 44px;background:rgba(10,13,22,.6);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-main);font-size:.95rem;transition:all .25s ease}.custom-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow);background:rgba(10,13,22,.8)}.primary-btn{width:100%;padding:14px;background:linear-gradient(135deg,var(--primary) 0%,#4f46e5 100%);color:#fff;font-weight:600;font-size:1rem;border-radius:var(--radius-md);box-shadow:var(--shadow-glow);display:flex;align-items:center;justify-content:center;gap:8px}.primary-btn:hover{transform:translateY(-1px);box-shadow:0 0 25px rgba(99,102,241,.6)}.error-text{color:var(--accent-red);font-size:.85rem;margin-top:10px}.sidebar{width:360px;height:100%;display:flex;flex-direction:column;border-right:1px solid var(--border);background:rgba(12,16,27,.85);z-index:10;flex-shrink:0}.sidebar-header{padding:16px 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.user-profile-widget{display:flex;align-items:center;gap:12px}.avatar{width:40px;height:40px;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--primary),var(--secondary));padding:2px;position:relative;flex-shrink:0}.avatar img{width:100%;height:100%;border-radius:var(--radius-full);background:#111;object-fit:cover}.status-indicator{position:absolute;bottom:0;right:0;width:11px;height:11px;border-radius:var(--radius-full);background:var(--accent-green);border:2px solid var(--bg-dark)}.user-info .display-name{font-weight:600;font-size:.92rem}.user-info .user-handle{font-size:.78rem;color:var(--text-muted)}.logout-btn{background:rgba(255,255,255,.05);color:var(--text-muted);padding:8px;border-radius:var(--radius-sm)}.logout-btn:hover{background:rgba(239,68,68,.15);color:var(--accent-red)}.search-section{padding:14px 16px}.search-box{position:relative;display:flex;align-items:center}.search-input{width:100%;padding:10px 14px 10px 38px;background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-main);font-size:.88rem;transition:all .2s ease}.search-input:focus{border-color:var(--primary);background:rgba(255,255,255,.07)}.search-icon{position:absolute;left:12px;color:var(--text-dim)}.conversations-list{flex:1;overflow-y:auto;padding:0 12px 12px}.section-label{font-size:.75rem;font-weight:700;text-transform:uppercase;color:var(--text-dim);padding:10px 8px 6px;letter-spacing:.05em}.chat-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;margin-bottom:4px}.chat-item:hover{background:var(--bg-card-hover)}.chat-item.active{background:var(--bg-accent);border:1px solid var(--border-glow)}.chat-item-details{flex:1;min-width:0}.chat-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2px}.chat-item-title{font-weight:600;font-size:.88rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-item-time{font-size:.72rem;color:var(--text-dim)}.chat-item-preview{font-size:.78rem;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-area{flex:1;height:100%;display:flex;flex-direction:column;background:rgba(8,10,18,.4);position:relative;min-width:0}.chat-area-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted);gap:16px;text-align:center;padding:40px}.empty-icon-wrapper{width:72px;height:72px;border-radius:50%;background:var(--bg-accent);display:flex;align-items:center;justify-content:center;color:var(--primary);margin-bottom:4px}.chat-header{padding:14px 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);background:rgba(12,16,27,.7);backdrop-filter:blur(12px);z-index:5}.chat-user-info{display:flex;align-items:center;gap:12px;min-width:0}.mobile-back-btn{display:none;background:rgba(255,255,255,.08);color:var(--text-main);padding:8px;border-radius:var(--radius-sm);margin-right:4px}.call-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.call-action-btn{display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:var(--radius-full);font-weight:500;font-size:.82rem;background:rgba(255,255,255,.06);color:var(--text-main);border:1px solid var(--border)}.call-action-btn:hover{background:var(--primary);border-color:var(--primary);box-shadow:var(--shadow-glow)}.call-action-btn.video:hover{background:var(--secondary);border-color:var(--secondary);box-shadow:0 0 15px var(--secondary-glow)}.messages-container{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:12px}.message-bubble{max-width:75%;padding:10px 14px;border-radius:var(--radius-lg);font-size:.92rem;line-height:1.4;position:relative;word-wrap:break-word;animation:slideUp .2s ease}.message-bubble.sent{align-self:flex-end;background:linear-gradient(135deg,var(--primary) 0%,#4338ca 100%);color:#fff;border-bottom-right-radius:4px;box-shadow:0 4px 12px rgba(99,102,241,.25)}.message-bubble.received{align-self:flex-start;background:rgba(30,39,61,.85);border:1px solid var(--border);color:var(--text-main);border-bottom-left-radius:4px}.message-meta{display:flex;align-items:center;justify-content:flex-end;gap:4px;margin-top:4px;font-size:.68rem;opacity:.75}.chat-input-container{padding:12px 16px;background:rgba(12,16,27,.85);border-top:1px solid var(--border)}.chat-input-form{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.05);border:1px solid var(--border);border-radius:var(--radius-full);padding:4px 6px 4px 16px}.chat-input-form:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.chat-text-input{flex:1;background:transparent;border:none;color:var(--text-main);font-size:.92rem}.send-btn{width:38px;height:38px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}.send-btn:hover{background:var(--primary-hover);transform:scale(1.05)}.call-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(3,5,10,.94);backdrop-filter:blur(20px);z-index:2000;display:flex;flex-direction:column;align-items:center;justify-content:space-between;padding:30px 20px;animation:fadeIn .3s ease}.call-header-info{text-align:center;z-index:10}.call-user-avatar{width:90px;height:90px;border-radius:50%;margin:0 auto 14px;border:3px solid var(--primary);box-shadow:var(--shadow-glow);overflow:hidden;position:relative}.call-user-avatar img{width:100%;height:100%;object-fit:cover}.call-status-text{font-size:1rem;color:var(--accent-cyan);font-weight:500;margin-top:4px}.video-grid{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;overflow:hidden}.remote-video-container{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:#05070c}.remote-video{width:100%;height:100%;object-fit:cover}.local-video-container{position:absolute;bottom:110px;right:20px;width:140px;height:190px;border-radius:var(--radius-md);overflow:hidden;border:2px solid var(--border-glow);box-shadow:var(--shadow-lg);background:#111;z-index:20}.local-video{width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}.call-controls-bar{display:flex;align-items:center;gap:16px;background:rgba(20,26,43,.9);backdrop-filter:blur(16px);padding:12px 24px;border-radius:var(--radius-full);border:1px solid var(--border);z-index:30}.control-btn{width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.1);color:#fff;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.control-btn:hover{background:rgba(255,255,255,.2);transform:scale(1.08)}.control-btn.active-off{background:rgba(239,68,68,.2);color:var(--accent-red);border:1px solid rgba(239,68,68,.4)}.control-btn.end-call{background:var(--accent-red);box-shadow:0 0 20px rgba(239,68,68,.5)}.control-btn.accept-call{background:var(--accent-green);box-shadow:0 0 20px rgba(16,185,129,.5)}@keyframes fadeIn{0%{opacity:0;transform:scale(.97)}to{opacity:1;transform:scale(1)}}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.sidebar{width:100%;border-right:none;display:flex}.chat-area{width:100%}.app-container.mobile-chat-open .sidebar{display:none}.app-container:not(.mobile-chat-open) .chat-area{display:none}.mobile-back-btn{display:flex;align-items:center;justify-content:center}.message-bubble{max-width:85%}.call-action-btn span{display:none}.call-action-btn{padding:8px;border-radius:50%}.local-video-container{width:110px;height:150px;bottom:90px;right:16px}}