:root{
 --ink:#101828;--muted:#667085;--line:#e4e7ec;--surface:#fff;--soft:#f8fafc;
 --brand:#155eef;--brand2:#0b4fc7;--success:#12b76a;
 font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
body{margin:0;color:var(--ink);background:#f6f8fb}
.demo-shell{max-width:1180px;margin:auto;min-height:100vh;padding:64px 28px;display:grid;grid-template-columns:minmax(0,1fr) 470px;gap:72px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 18px;font-size:13px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--brand)}
.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px #12b76a18}
.demo-copy h1{font-size:clamp(2.8rem,5vw,5rem);letter-spacing:-.055em;line-height:.98;margin:0 0 22px;max-width:720px}
.lead{font-size:18px;line-height:1.65;color:var(--muted);max-width:650px;margin:0}
.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:32px 0}
.feature-grid div{background:rgba(255,255,255,.8);border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:0 5px 20px #10182808}
.feature-grid b{font-size:15px}.feature-grid span{display:block;color:var(--muted);font-size:14px;margin-top:6px}
.desk-link{display:inline-flex;background:var(--ink);color:#fff;padding:13px 18px;border-radius:11px;text-decoration:none;font-weight:750;box-shadow:0 8px 20px #10182818}
.chat-card{height:700px;background:var(--surface);border:1px solid #dfe3ea;border-radius:28px;box-shadow:0 24px 70px #1018281c;display:flex;flex-direction:column;overflow:hidden}
.chat-head{padding:20px 22px;border-bottom:1px solid var(--line);background:#fff;display:flex;justify-content:space-between;align-items:center}
.brand-wrap{display:flex;align-items:center;gap:12px}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--brand),#7f56d9);display:grid;place-items:center;color:#fff;font-weight:900;box-shadow:0 7px 18px #155eef35}
.chat-head strong{font-size:15px;display:block;letter-spacing:-.01em}.chat-head small{display:block;color:var(--muted);margin-top:3px;font-size:12px}
.status{display:flex;align-items:center;gap:7px;color:#475467;font-size:12px;font-weight:650}.online{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 0 3px #12b76a18}
.messages{flex:1;padding:24px 22px;overflow:auto;display:flex;flex-direction:column;gap:14px;background:linear-gradient(#fff,#fbfcfe)}
.msg{max-width:84%;padding:13px 15px;border-radius:17px;line-height:1.5;font-size:14px;box-shadow:0 1px 2px #1018280a}
.bot{align-self:flex-start;background:#f2f4f7;border:1px solid #eaecf0;border-bottom-left-radius:5px;color:#344054}
.user{align-self:flex-end;background:var(--brand);color:#fff;border-bottom-right-radius:5px;box-shadow:0 6px 16px #155eef22}
.quick{display:flex;gap:8px;overflow:auto;padding:2px 18px 14px;background:#fff}
.quick button{white-space:nowrap;border:1px solid #cfd6e2;background:#fff;color:#344054;border-radius:999px;padding:9px 13px;cursor:pointer;font:600 12px inherit;transition:.15s}
.quick button:hover{border-color:#98a2b3;background:#f8fafc}
#chatForm{display:flex;gap:10px;padding:15px 16px 17px;border-top:1px solid var(--line);background:#fff}
.chatForm input{flex:1}
#chatInput{min-width:0;height:48px;border:1px solid #d0d5dd;border-radius:14px;padding:0 16px;background:#f9fafb;color:var(--ink);font:500 14px inherit;outline:none;transition:.15s}
#chatInput:focus{background:#fff;border-color:#84adff;box-shadow:0 0 0 4px #155eef14}
#chatInput::placeholder{color:#98a2b3}
#chatForm button{height:48px;min-width:82px;border:0;border-radius:14px;background:var(--brand);color:#fff;font:750 14px inherit;cursor:pointer;box-shadow:0 7px 16px #155eef26;transition:.15s}
#chatForm button:hover{background:var(--brand2);transform:translateY(-1px)}
@media(max-width:900px){.demo-shell{grid-template-columns:1fr;padding:36px 18px;gap:35px}.chat-card{height:650px}.demo-copy h1{font-size:3.1rem}}
@media(max-width:520px){.feature-grid{grid-template-columns:1fr}.chat-card{height:620px;border-radius:22px}.demo-copy h1{font-size:2.7rem}}