:root{--ink:#222434;--muted:#727588;--line:#e9eaf0;--surface:#fff;--canvas:#f7f7fa;--purple:#6957e8;--purple-soft:#f0edff;--green:#1aa878}*{box-sizing:border-box}body{background:var(--canvas);color:var(--ink);margin:0;font:14px/1.4 Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}.app-shell{grid-template-columns:230px 330px minmax(420px,1fr) 290px;min-height:100vh;display:grid}.sidebar{color:#dde;background:#272640;flex-direction:column;padding:24px 14px;display:flex}.brand{color:#fff;align-items:center;gap:10px;padding:0 10px 29px;font-size:14px;line-height:1.1;text-decoration:none;display:flex}.brand-mark{color:#272640;background:#a89cff;border-radius:9px;place-items:center;width:32px;height:32px;font-size:18px;font-weight:800;display:grid}.brand b{font-size:16px}.sidebar nav{gap:5px;display:grid}.nav-item{color:#c9c8d8;border-radius:8px;align-items:center;gap:11px;padding:10px;text-decoration:none;display:flex}.nav-item b{color:#332415;background:#f1a65d;border-radius:10px;margin-left:auto;padding:1px 6px;font-size:11px}.nav-item.active,.nav-item:hover{color:#fff;background:#41405c}.sidebar-footer{border-top:1px solid #4a4961;margin-top:auto;padding:18px 9px 0;font-size:12px}.presence,.online{background:#55d29d;border-radius:50%;width:8px;height:8px;margin-right:7px;display:inline-block}.conversation-list,.chat,.guest-card{background:var(--surface);border-right:1px solid var(--line)}.panel-header{justify-content:space-between;align-items:center;padding:24px 20px 16px;display:flex}.eyebrow{color:var(--muted);margin:0;font-size:12px}.panel-header h1,.chat h2,.guest-card h2{margin:2px 0 0;font-size:20px}.icon-button{color:#5e6072;cursor:pointer;background:#f5f5f8;border:0;border-radius:8px;width:34px;height:34px;font-size:18px}.search{color:#8c8d9b;background:#f6f6f8;border-radius:8px;align-items:center;gap:7px;margin:0 16px;padding:0 10px;display:flex}.search input{width:100%;font:inherit;background:0 0;border:0;outline:0;padding:10px 0}.filters{gap:5px;padding:16px;display:flex}.filter{color:var(--muted);cursor:pointer;background:0 0;border:0;padding:6px 8px}.filter.selected{color:var(--purple);background:var(--purple-soft);border-radius:7px}.filter b{font-size:11px}.thread{color:inherit;border-top:1px solid #f4f4f6;gap:10px;padding:13px 16px;text-decoration:none;display:flex;position:relative}.thread.selected{box-shadow:inset 3px 0 var(--purple);background:#f3f1ff}.avatar{color:#5647bd;background:#e1defc;border-radius:50%;flex:0 0 38px;place-items:center;width:38px;height:38px;font-size:12px;font-weight:700;display:grid}.thread-body{flex:1;min-width:0}.thread-top{justify-content:space-between;gap:4px;display:flex}.thread-top time{color:var(--muted);font-size:11px}.thread-preview{white-space:nowrap;text-overflow:ellipsis;color:var(--muted);margin-top:4px;font-size:12px;display:block;overflow:hidden}.channel-badge{color:#5c5684;background:#eeeefa;border-radius:4px;padding:2px 5px;font-size:10px}.unread{background:var(--purple);color:#fff;border-radius:50%;place-items:center;width:17px;height:17px;font-size:10px;display:grid;position:absolute;bottom:13px;right:16px}.chat{flex-direction:column;min-width:0;display:flex}.chat-header{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding:17px 22px;display:flex}.chat-header h2{font-size:15px}.chat-header p{color:var(--muted);margin:2px 0;font-size:12px}.more{margin-left:auto}.mobile-back{display:none}.large{flex-basis:40px;width:40px;height:40px}.notice{color:#686879;background:#f4f3f7;border-radius:6px;margin:16px auto 0;padding:5px 10px;font-size:11px}.messages{flex-direction:column;flex:1;gap:12px;padding:20px clamp(16px,4vw,56px);display:flex;overflow:auto}.message-group{text-align:center;color:#9899a5;margin:2px;font-size:11px}.message{border-radius:12px;max-width:75%;padding:10px 12px;font-size:13px}.message small{text-align:right;color:#8b8c99;padding-top:3px;font-size:10px;display:block}.incoming{background:#f1f1f4;border-bottom-left-radius:3px;align-self:flex-start}.outgoing{background:#e8e4ff;border-bottom-right-radius:3px;align-self:flex-end}.composer{border:1px solid #dddde5;border-radius:11px;align-items:center;gap:8px;margin:0 20px;padding:6px 8px;display:flex}.composer textarea{font:inherit;resize:none;border:0;outline:0;flex:1;padding:6px}.attach,.template-button{color:var(--purple);cursor:pointer;background:0 0;border:0}.template-button{font-size:12px}.send-button{background:var(--purple);color:#fff;border:0;border-radius:7px;width:30px;height:30px;font-size:17px}.send-note{color:#9293a0;text-align:center;margin:6px 0 15px;font-size:11px}.guest-card{padding:0 20px}.guest-card header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:19px 0;display:flex}.guest-card h2{font-size:16px}.guest-summary{text-align:center;padding:23px 0 18px}.xl{flex-basis:54px;width:54px;height:54px;margin:auto;font-size:15px}.guest-summary h3{margin:9px 0 2px;font-size:16px}.guest-summary p{color:var(--muted);margin:0;font-size:12px}.guest-card dl{margin:0}.guest-card dl div{border-top:1px solid #f0f0f3;padding:11px 0}.guest-card dt{color:var(--muted);margin-bottom:2px;font-size:11px}.guest-card dd{margin:0;font-size:13px}.status{color:#ab641b;background:#fff1df;border-radius:10px;padding:3px 7px;font-size:11px}.tags{border-top:1px solid #f0f0f3;margin-top:9px;padding-top:13px}.tags p{color:var(--muted);margin:0 0 8px;font-size:11px}.tags span{color:#278365;background:#e9f7f2;border-radius:10px;padding:4px 8px;font-size:11px}.tags button{color:var(--purple);cursor:pointer;background:0 0;border:0;margin-top:9px;padding:0;font-size:12px;display:block}.resolve{color:#348066;cursor:pointer;background:#ecf8f3;border:1px solid #d4eee2;border-radius:8px;width:100%;margin-top:24px;padding:9px}@media (max-width:1100px){.app-shell{grid-template-columns:68px 300px minmax(390px,1fr)}.sidebar{padding:24px 10px}.brand{padding-left:8px}.brand>span:last-child,.nav-item:not(.active):after,.nav-item{font-size:0}.nav-item{justify-content:center}.nav-item span{font-size:18px}.sidebar-footer{text-align:center;font-size:0}.sidebar-footer .presence{margin:0}.guest-card{display:none}}@media (max-width:720px){.app-shell{display:block}.sidebar{display:none}.conversation-list{min-height:100vh}.chat,.guest-card,.conversation-list:target{display:none}.chat:target{min-height:100vh;display:flex}.chat:target~.guest-card{display:none}.mobile-back{color:#56566a;background:0 0;border:0;font-size:22px;display:block}.thread-list{padding-bottom:20px}}.empty-state{color:var(--muted);text-align:center;padding:24px}.empty-chat{text-align:center;color:var(--muted);margin:auto}.empty-chat h2{color:var(--ink)}.disabled-composer{color:var(--muted);background:#f6f6f8;margin-bottom:20px}.sidebar-footer button{color:#dde;cursor:pointer;background:0 0;border:0}.mobile-back{text-decoration:none}.search:focus-within{outline:2px solid var(--purple-soft)}