:root{--background:#fbfaf6;--foreground:#24312f;--muted:#6d7872;--card:#fff;--border:#e1e4dc;--primary:#4f7f8a;--primary-dark:#35636d;--primary-soft:#eef6f4;--warm-soft:#f7f0e6;--ring:rgba(79,127,138,.24);--shadow:0 16px 36px rgba(54,69,65,.07)}*{box-sizing:border-box}body{margin:0;background:var(--background);color:var(--foreground);font-family:Atkinson Hyperlegible,Aptos,Segoe UI,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;font-size:16px;line-height:1.5}button,textarea{font:inherit}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:10;border-bottom:1px solid var(--border);background:hsla(48,38%,97%,.9);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.topbar-inner{max-width:960px;margin:0 auto;padding:12px 18px;justify-content:space-between;gap:16px}.brand,.topbar-inner{display:flex;align-items:center}.brand{gap:12px}.avatar,.brand-mark,.hero-icon{display:grid;place-items:center}.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(145deg,var(--primary),#6d9b8f);color:#fff}h1,h2,p{margin:0}h1{font-size:18px;font-weight:650;line-height:1.1}.brand p{margin-top:3px;color:var(--muted);font-size:12px}.ghost-button{height:36px;border:0;background:transparent;color:var(--muted);display:inline-flex;align-items:center;gap:8px;padding:0 10px;border-radius:8px;cursor:pointer}.ghost-button:hover{background:var(--warm-soft);color:var(--foreground)}.chat-layout{width:min(100%,960px);margin:0 auto;flex:1 1;display:flex;flex-direction:column;padding:32px 18px 20px}.chat-layout.active{padding-top:20px}.welcome{flex:1 1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.hero-icon{width:66px;height:66px;border-radius:20px;background:linear-gradient(145deg,var(--primary-soft),var(--warm-soft));color:var(--primary);margin-bottom:24px}h2{font-size:clamp(27px,4vw,36px);line-height:1.14;letter-spacing:0;font-weight:620}h2 span{color:var(--primary)}.welcome>p{max-width:680px;margin-top:14px;color:var(--muted);font-size:17px;line-height:1.68}.suggestion-grid{width:min(100%,720px);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:12px;gap:12px;margin:34px 0 28px}.suggestion-card{border:1px solid var(--border);border-radius:14px;background:var(--card);color:var(--foreground);padding:16px;text-align:left;cursor:pointer;transition:border-color .16s ease,background .16s ease,transform .16s ease}.suggestion-card:hover{border-color:rgba(79,127,138,.36);background:var(--primary-soft);transform:translateY(-1px)}.suggestion-card span{display:inline-flex;align-items:center;gap:8px;color:var(--foreground);font-weight:620;font-size:14px}.suggestion-card svg{color:var(--primary)}.suggestion-card p{margin-top:8px;color:var(--muted);font-size:14px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.messages{flex:1 1;display:flex;flex-direction:column;gap:20px;padding-bottom:20px}.message-row{display:flex;gap:12px;align-items:flex-start}.message-row.user{flex-direction:row-reverse}.avatar{width:34px;height:34px;border-radius:12px;flex:0 0 auto}.assistant .avatar{background:var(--primary-soft);color:var(--primary)}.user .avatar{background:var(--primary-dark);color:#fff}.message-stack{max-width:min(86%,720px)}.user .message-stack{display:flex;flex-direction:column;align-items:flex-end}.copy-button{margin-top:9px;border:1px solid var(--border);border-radius:999px;background:hsla(0,0%,100%,.74);color:var(--primary-dark);display:inline-flex;align-items:center;gap:7px;padding:6px 11px;font-size:12px;cursor:pointer}.copy-button:hover{background:var(--primary-soft);border-color:rgba(79,127,138,.36)}.bubble{border-radius:16px;padding:15px 17px;background:var(--card);border:1px solid var(--border);box-shadow:0 8px 20px rgba(54,69,65,.045);font-size:14.5px;line-height:1.68}.bubble p+p{margin-top:8px}.bubble h3,.bubble h4,.bubble h5{margin:16px 0 8px;color:var(--foreground);font-weight:620;line-height:1.3}.bubble h3:first-child,.bubble h4:first-child,.bubble h5:first-child{margin-top:0}.bubble h3{font-size:17px}.bubble h4,.bubble h5{font-size:15px}.bubble ul{margin:0;padding-left:20px}.bubble p+ul,.bubble ul+p,.bubble ul+ul{margin-top:10px}.bubble li+li{margin-top:8px}.bubble .table-scroll{max-width:100%;margin:10px 0;overflow-x:auto;border:1px solid var(--border);border-radius:10px;background:#fff}.bubble table{width:100%;min-width:520px;border-collapse:collapse;font-size:13px;line-height:1.45}.bubble td,.bubble th{padding:9px 11px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}.bubble th{background:var(--primary-soft);color:var(--foreground);font-weight:620}.bubble tr:last-child td{border-bottom:0}.bubble td+td,.bubble th+th{border-left:1px solid var(--border)}.user .bubble .table-scroll{border-color:hsla(0,0%,100%,.28)}.user .bubble th{background:hsla(0,0%,100%,.14);color:#fff}.user .bubble td,.user .bubble th{border-color:hsla(0,0%,100%,.22)}.bubble strong{font-weight:620}.bubble a{color:var(--primary-dark);text-decoration:underline;-webkit-text-decoration-color:rgba(79,127,138,.32);text-decoration-color:rgba(79,127,138,.32);text-underline-offset:3px}.bubble a:hover{-webkit-text-decoration-color:var(--primary-dark);text-decoration-color:var(--primary-dark)}.user .bubble{background:var(--primary-dark);color:#fff;border-color:var(--primary-dark);box-shadow:none}.user .bubble a{color:#fff;-webkit-text-decoration-color:hsla(0,0%,100%,.45);text-decoration-color:hsla(0,0%,100%,.45)}.sources{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:10px;gap:10px;margin-top:10px}.source-card{min-width:0;display:grid;grid-template-columns:54px minmax(0,1fr);align-items:center;grid-gap:10px;gap:10px;color:var(--foreground);background:var(--card);border:1px solid var(--border);border-radius:12px;padding:7px;text-decoration:none}.source-card:hover{border-color:rgba(79,127,138,.36);background:var(--primary-soft)}.source-card img,.source-fallback{width:54px;height:42px;border-radius:7px;object-fit:cover;background:var(--primary-soft)}.source-card span{min-width:0}.source-card small,.source-card strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.source-card 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8px;color:var(--foreground)}textarea::placeholder{color:#8a96a8}.send-button{width:40px;height:40px;border:0;border-radius:12px;background:var(--primary);color:#fff;display:grid;place-items:center;cursor:pointer}.send-button:hover{background:var(--primary-dark)}.send-button:disabled{cursor:not-allowed;opacity:.45}.loader{display:inline-block;width:14px;height:14px;margin-right:8px;border-radius:999px;border:2px solid rgba(37,99,235,.18);border-top:2px solid var(--primary);animation:spin .8s linear infinite;vertical-align:-2px}.streaming-status{display:inline-flex;align-items:center;margin-top:2px;color:var(--muted)}footer{border-top:1px solid var(--border);background:hsla(35,52%,94%,.55);color:var(--muted);font-size:12px;text-align:center;padding:16px}@keyframes spin{to{transform:rotate(1turn)}}@media (max-width:720px){.topbar-inner{padding-inline:14px}.brand p{display:none}.chat-layout{padding-inline:14px}.suggestion-grid{grid-template-columns:1fr}.welcome>p{font-size:16px}.message-stack{max-width:calc(100% - 46px)}.sources{grid-template-columns:1fr}}