*{box-sizing:border-box} body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:#f4f6f8;color:#172033}
.app{display:flex;height:100vh}.sidebar{width:290px;background:#101a2b;color:#fff;padding:22px 18px;display:flex;flex-direction:column}
.brand{display:flex;gap:12px;align-items:center;margin-bottom:28px}.brand-mark{width:42px;height:42px;border-radius:10px;background:#fff;color:#101a2b;display:grid;place-items:center;font-weight:800}
.brand strong{display:block;font-size:17px}.brand span{font-size:12px;color:#aeb8c7}.section-title{font-size:11px;letter-spacing:.12em;color:#8492a6;margin:12px 6px 8px}
.agent-card{width:100%;border:1px solid transparent;background:transparent;color:#dce4ef;padding:12px;border-radius:10px;display:flex;gap:12px;text-align:left;cursor:pointer;margin-bottom:6px}
.agent-card:hover,.agent-card.active{background:#1d2a40;border-color:#32435f}.agent-icon{font-size:20px}.agent-card strong{display:block}.agent-card small{display:block;color:#9eabc0;margin-top:3px}
.docs-title{margin-top:22px}.documents{font-size:13px;overflow:auto;max-height:240px}.documents.empty{color:#8290a4}.doc{padding:7px 4px;border-bottom:1px solid #22304a}
.sidebar-actions{margin-top:auto;display:grid;gap:8px}.secondary{background:#17243a;border:1px solid #33445f;color:#dce4ef;padding:10px;border-radius:8px;cursor:pointer}
.main{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{height:86px;background:#fff;border-bottom:1px solid #e2e7ee;padding:17px 28px;display:flex;justify-content:space-between;align-items:center}
.topbar h1{font-size:21px;margin:0 0 4px}.topbar p{margin:0;color:#6b7585;font-size:13px}.status{font-size:12px;background:#eef2f6;padding:7px 10px;border-radius:20px}
.chat{flex:1;overflow:auto;padding:32px max(24px,calc((100% - 900px)/2));}.welcome{text-align:center;padding:70px 20px}.welcome h2{font-size:28px;margin-bottom:8px}.welcome p{color:#687386}
.quick-prompts{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-width:720px;margin:28px auto}.quick-prompts button{background:#fff;border:1px solid #dfe5ec;border-radius:10px;padding:14px;text-align:left;cursor:pointer}
.message{max-width:900px;margin:0 auto 22px;line-height:1.55}.message.user{background:#1d2a40;color:#fff;padding:13px 16px;border-radius:14px 14px 3px 14px;width:fit-content;max-width:75%;margin-left:auto}
.message.assistant{background:#fff;border:1px solid #e1e6ec;padding:20px 24px;border-radius:12px;box-shadow:0 2px 8px rgba(15,25,40,.04)}
.message table{width:100%;border-collapse:collapse;font-size:13px;margin:14px 0}.message th,.message td{border:1px solid #dce2e9;padding:8px;vertical-align:top}.message th{background:#f3f5f8}
.composer{background:#fff;border-top:1px solid #e1e6ec;padding:12px max(24px,calc((100% - 900px)/2)) 15px}.composer-row{display:flex;gap:10px;align-items:flex-end;border:1px solid #ccd5df;border-radius:13px;padding:8px;background:#fff}
.attach{font-size:24px;width:36px;height:36px;display:grid;place-items:center;cursor:pointer;color:#46556a}.composer textarea{flex:1;border:0;outline:none;resize:none;font:inherit;padding:8px;max-height:140px}.send{border:0;background:#17243a;color:#fff;padding:10px 16px;border-radius:9px;cursor:pointer}.send:disabled{opacity:.55}
.file-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:7px}.file-chips span{font-size:12px;background:#eef2f6;border-radius:16px;padding:6px 9px}.composer small{display:block;color:#9099a8;margin-top:6px}
@media(max-width:800px){.sidebar{width:220px}.quick-prompts{grid-template-columns:1fr}.chat{padding:20px}.composer{padding:10px}.topbar{padding:14px 18px}}