:root{--bg:#09090b;--surface:#141416;--line:#303036;--muted:#92929c;--pink:#ff50bd;--violet:#9d6bff}*{box-sizing:border-box}body,html{height:100%}body{margin:0;color:#fafafa;background:radial-gradient(circle at 70% -10%,#31172d,transparent 34%),var(--bg);font-family:Inter,Microsoft YaHei,system-ui,sans-serif}.shell{width:min(1500px,calc(100% - 32px));height:calc(100vh - 32px);margin:16px auto;display:grid;grid-template-columns:240px minmax(420px,1fr) 290px;overflow:hidden;border:1px solid var(--line);border-radius:22px;background:#101012}.sidebar{padding:24px 16px;display:flex;flex-direction:column;gap:20px;border-right:1px solid var(--line);background:#0c0c0e}.brand{font-weight:900;letter-spacing:.08em}.brand b{color:var(--pink)}button,input,select,textarea{font:inherit}.sidebar button,form button{padding:12px;border:0;border-radius:12px;color:white;background:linear-gradient(135deg,var(--pink),var(--violet));font-weight:800}.sidebar small{color:var(--muted)}.conversation{min-width:0;min-height:0;display:grid;grid-template-rows:76px minmax(0,1fr) auto}.conversation>header{padding:14px 24px;display:flex;align-items:center;border-bottom:1px solid var(--line);background:#141416}.conversation>header div{display:grid;grid-template-columns:auto auto;column-gap:9px}.conversation>header i{width:9px;height:9px;grid-row:1/3;align-self:center;border-radius:50%;background:#53e59a}.conversation>header small{grid-column:2;color:var(--muted)}.messages{padding:28px;overflow-y:auto;display:flex;flex-direction:column;gap:16px}.intro{margin:auto;text-align:center;color:var(--muted)}.intro>div{width:76px;height:76px;margin:auto;display:grid;place-items:center;border-radius:22px;color:white;background:linear-gradient(135deg,var(--pink),var(--violet));font-size:24px;font-weight:900}.intro h1{color:white;font-size:40px}.messages article{width:fit-content;max-width:76%}.messages article small{color:var(--muted)}.messages article p{margin:6px 0 0;padding:14px 17px;border:1px solid var(--line);border-radius:18px 18px 18px 5px;background:#1b1b1f;line-height:1.7;white-space:pre-wrap}.messages article.user{align-self:flex-end;text-align:right}.messages article.user p{border-radius:18px 18px 5px 18px;background:linear-gradient(135deg,#9c286f,#703e9d)}.typing{color:#ff8bd2}.conversation footer{padding:13px 22px;border-top:1px solid var(--line);background:#141416}.conversation form{display:grid;grid-template-columns:1fr auto;gap:10px}.conversation textarea{min-height:54px;max-height:150px;padding:14px;color:white;border:1px solid var(--line);border-radius:15px;background:#0d0d0f;resize:vertical}.conversation footer>small{display:block;margin-top:7px;text-align:center;color:var(--muted)}.error{color:#ff9b9b}.profile{padding:22px 18px;overflow-y:auto;border-left:1px solid var(--line);background:linear-gradient(180deg,#211424,#121214 52%)}.avatar{width:82px;height:82px;margin:auto;display:grid;place-items:center;border-radius:50%;background:linear-gradient(135deg,var(--pink),var(--violet));font-size:30px;font-weight:900}.profile label{margin-top:16px;display:grid;gap:7px;color:var(--muted);font-size:12px}.profile input,.profile select,.profile textarea{padding:11px;color:white;border:1px solid var(--line);border-radius:11px;background:#0d0d0f}.profile textarea{min-height:110px;resize:vertical}@media(max-width:1000px){.shell{grid-template-columns:220px 1fr}.profile{display:none}}@media(max-width:700px){.shell{width:100%;height:100vh;margin:0;grid-template-columns:1fr;border:0;border-radius:0}.sidebar{display:none}.messages{padding:18px 12px}}