:root{--bg: #0c1220;--panel: #111a2e;--panel-alt: #16213a;--border: #223154;--text: #e7ecf7;--muted: #8a94ad;--accent: #2e6bff;--green: #22c55e;--red: #ef4444;--orange: #f59e0b;--purple: #a855f7}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:Segoe UI,Roboto,-apple-system,sans-serif}button{font-family:inherit;cursor:pointer}a{color:inherit}.app-shell{display:flex;height:100vh;overflow:hidden}.auth-screen{height:100vh;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 30% 20%,#16213a,#0c1220 70%)}.auth-card{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:32px;width:360px;box-shadow:0 20px 60px #0006}.auth-card h1{font-size:20px;margin:0 0 4px}.auth-card p.sub{color:var(--muted);font-size:13px;margin:0 0 20px}.field{margin-bottom:14px}.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}.field input{width:100%;background:var(--panel-alt);border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:8px;font-size:14px}.btn-primary{width:100%;background:var(--accent);color:#fff;border:none;padding:11px;border-radius:8px;font-weight:600;font-size:14px;margin-top:6px}.btn-link{background:none;border:none;color:var(--accent);font-size:13px;margin-top:14px;width:100%}.error-msg{background:#ef44441f;color:#fca5a5;padding:8px 10px;border-radius:8px;font-size:12px;margin-bottom:12px}.sidebar{width:260px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px 12px;flex-shrink:0}.brand{display:flex;align-items:center;gap:8px;padding:6px 8px 18px;font-weight:700;letter-spacing:.5px}.brand .dot{width:8px;height:8px;border-radius:50%;background:var(--green)}.nav-section-title{font-size:11px;color:var(--muted);text-transform:uppercase;margin:14px 8px 6px;letter-spacing:.5px}.channel-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;margin-bottom:4px;cursor:pointer;font-size:14px;color:var(--text)}.channel-item:hover{background:var(--panel-alt)}.channel-item.active{background:var(--panel-alt);border:1px solid var(--border)}.channel-dot{width:9px;height:9px;border-radius:50%;flex-shrink:0}.channel-item .count{margin-left:auto;font-size:11px;color:var(--muted)}.sidebar-footer{margin-top:auto}.btn-outline{width:100%;background:transparent;border:1px solid var(--border);color:var(--text);padding:9px;border-radius:8px;font-size:13px}.btn-outline.danger{color:#fca5a5;border-color:#ef444459;margin-top:8px}.main-col{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--border);background:var(--panel)}.topbar .title{font-weight:700;font-size:16px}.topbar .sub{font-size:12px;color:var(--green);display:flex;align-items:center;gap:6px}.badge-rec{background:#ef444426;color:#fca5a5;font-size:11px;padding:4px 10px;border-radius:999px;display:flex;align-items:center;gap:5px}.ptt-area{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px}.speaking-label{font-size:14px;color:var(--green);font-weight:600;margin-bottom:18px;min-height:20px}.ptt-btn{width:190px;height:190px;border-radius:50%;border:none;color:#fff;font-weight:700;background:radial-gradient(circle at 40% 35%,#3b82f6,#1d4ed8);box-shadow:0 0 0 8px #2e6bff1f;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:6px;font-size:15px;transition:transform .1s ease}.ptt-btn.active{background:radial-gradient(circle at 40% 35%,#34d399,#16a34a);box-shadow:0 0 0 14px #22c55e2e;transform:scale(1.03)}.ptt-hint{color:var(--muted);font-size:12px;margin-top:18px}.recent-speakers{margin-top:24px;display:flex;gap:10px;flex-wrap:wrap;justify-content:center}.speaker-chip{background:var(--panel-alt);border:1px solid var(--border);border-radius:999px;padding:6px 12px;font-size:12px}.bottom-tabs{display:flex;border-top:1px solid var(--border);background:var(--panel)}.bottom-tabs button{flex:1;background:none;border:none;color:var(--muted);padding:12px;font-size:13px}.bottom-tabs button.active{color:var(--accent);font-weight:600}.users-col{width:260px;background:var(--panel);border-left:1px solid var(--border);padding:16px 12px;overflow-y:auto;flex-shrink:0}.users-col h3{font-size:12px;text-transform:uppercase;color:var(--muted);margin:4px 8px 10px}.user-row{display:flex;align-items:center;gap:10px;padding:8px;border-radius:8px}.user-row:hover{background:var(--panel-alt)}.avatar{width:34px;height:34px;border-radius:50%;background:var(--panel-alt);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex-shrink:0;border:2px solid var(--border)}.avatar.online{border-color:var(--green)}.avatar.speaking{border-color:var(--green);box-shadow:0 0 0 3px #22c55e40}.user-name{font-size:13px;font-weight:600}.user-status{font-size:11px;color:var(--muted)}.status-dot{width:7px;height:7px;border-radius:50%;display:inline-block;margin-right:4px}.status-online{background:var(--green)}.status-away{background:var(--orange)}.status-offline{background:#475569}.panel-card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:16px;margin:16px}.rec-table{width:100%;border-collapse:collapse;font-size:13px}.rec-table th{text-align:left;color:var(--muted);font-weight:500;padding:8px;border-bottom:1px solid var(--border)}.rec-table td{padding:8px;border-bottom:1px solid var(--border)}.rec-table tr:hover td{background:var(--panel-alt)}.play-btn{background:var(--accent);border:none;color:#fff;border-radius:6px;padding:5px 10px;font-size:12px}.filters-row{display:flex;gap:10px;margin-bottom:14px;flex-wrap:wrap}.filters-row input,.filters-row select{background:var(--panel-alt);border:1px solid var(--border);color:var(--text);padding:8px 10px;border-radius:8px;font-size:13px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;padding:16px}.stat-card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:16px}.stat-card .label{font-size:12px;color:var(--muted);margin-bottom:6px}.stat-card .value{font-size:26px;font-weight:700}.admin-tabs{display:flex;gap:8px;padding:0 16px}.admin-tabs button{background:var(--panel);border:1px solid var(--border);color:var(--muted);padding:8px 14px;border-radius:8px;font-size:13px}.admin-tabs button.active{color:#fff;background:var(--accent);border-color:var(--accent)}@media (max-width: 900px){.app-shell{flex-direction:column}.sidebar,.users-col{display:none}.main-col{height:100vh}.ptt-btn{width:150px;height:150px}}.toast{position:fixed;bottom:20px;right:20px;background:var(--panel);border:1px solid var(--border);padding:12px 16px;border-radius:10px;font-size:13px}.loading-screen{display:flex;align-items:center;justify-content:center;height:100vh;color:var(--muted)}.chat-panel{flex:1;display:flex;flex-direction:column;min-height:0;padding:16px}.chat-header{font-weight:700;font-size:14px;margin-bottom:10px;color:var(--muted)}.chat-messages{flex:1;overflow-y:auto;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:10px}.chat-msg{display:flex;flex-direction:column;gap:2px;max-width:70%;background:var(--panel-alt);padding:8px 12px;border-radius:10px;font-size:13px}.chat-msg.own{align-self:flex-end;background:#2e6bff2e}.chat-author{font-size:11px;color:var(--accent);font-weight:700}.chat-empty{color:var(--muted);font-size:13px;text-align:center;padding:20px}.chat-input-row{display:flex;gap:8px;margin-top:12px}.chat-input-row input{flex:1;background:var(--panel-alt);border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:8px;font-size:13px}.notif-wrapper{position:relative}.notif-bell{background:var(--panel-alt);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:7px 10px;font-size:14px;position:relative}.notif-badge{position:absolute;top:-6px;right:-6px;background:var(--red);color:#fff;font-size:10px;border-radius:999px;padding:1px 5px}.notif-dropdown{position:absolute;right:0;top:42px;width:300px;max-height:380px;overflow-y:auto;background:var(--panel);border:1px solid var(--border);border-radius:12px;box-shadow:0 12px 40px #0006;z-index:50;padding:10px}.notif-dropdown-title{font-size:12px;color:var(--muted);text-transform:uppercase;margin-bottom:8px;padding:0 6px}.notif-item{padding:9px;border-radius:8px;margin-bottom:4px}.notif-item:hover{background:var(--panel-alt)}.notif-item.urgent{background:#ef44441f}.notif-item-title{font-size:12px;font-weight:700}.notif-item-body{font-size:12px;color:var(--muted);margin-top:2px}.notif-item-time{font-size:10px;color:var(--muted);margin-top:4px}.notif-empty{font-size:12px;color:var(--muted);text-align:center;padding:14px}.emergency-btn{background:var(--red);color:#fff;border:none;border-radius:8px;padding:8px 14px;font-size:12px;font-weight:700;animation:pulse-red 1.6s infinite}@keyframes pulse-red{0%,to{box-shadow:0 0 #ef444480}50%{box-shadow:0 0 0 8px #ef444400}}.emergency-banner{background:var(--red);color:#fff;padding:10px 20px;font-size:13px;font-weight:600;text-align:center}.channel-item.emergency{border-left:3px solid var(--red)}.activity-chart{display:flex;align-items:flex-end;gap:6px;height:140px;padding:10px 4px}.activity-bar-col{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%}.activity-bar{width:100%;background:linear-gradient(180deg,#3b82f6,#1d4ed8);border-radius:4px 4px 0 0;min-height:2px}.activity-bar-label{font-size:9px;color:var(--muted);margin-top:4px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:flex;align-items:center;justify-content:center;z-index:100}.modal-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:20px;width:320px;max-height:70vh;display:flex;flex-direction:column}.modal-card h3{margin:0 0 4px;font-size:16px}.modal-card .sub{color:var(--muted);font-size:12px;margin:0 0 12px}.user-pick-list{overflow-y:auto;flex:1;margin-bottom:12px}.group-card{background:var(--panel-alt);border:1px solid var(--border);border-radius:10px;padding:12px;margin-bottom:10px}.group-card .group-title{font-weight:700;font-size:14px;margin-bottom:6px}.group-members-chips{display:flex;gap:6px;flex-wrap:wrap}.chip{background:var(--panel);border:1px solid var(--border);border-radius:999px;padding:3px 10px;font-size:11px}.top-list-row{display:flex;justify-content:space-between;padding:8px 10px;border-bottom:1px solid var(--border);font-size:13px}.section-heading{font-size:13px;font-weight:700;color:var(--muted);text-transform:uppercase;margin:18px 16px 8px}