:root{--paper:#f7f3ea;--panel:#fffaf0;--ink:#1c1c1a;--muted:#6d6a61;--line:#ded5c7;--mint:#0f766e;--mint-ink:#063c39;--coral:#c94b32;--blue:#245bdb;--shadow:0 18px 50px #27241c21}*{box-sizing:border-box}html,body{height:100%}body{color:var(--ink);background:var(--paper);letter-spacing:0;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}.auth-page{background:linear-gradient(135deg, #0f766e29, transparent 34%), linear-gradient(315deg, #c94b3226, transparent 32%), var(--paper);place-items:center;min-height:100vh;padding:32px;display:grid}.auth-panel{border:1px solid var(--line);width:min(960px,100%);box-shadow:var(--shadow);background:#fffaf0e0;border-radius:8px;padding:32px}.brand-lockup{align-items:center;gap:14px;display:flex}.brand-lockup h1,.brand-lockup p{margin:0}.brand-lockup h1{font-size:28px;line-height:1}.brand-lockup.compact h1{font-size:20px}.brand-mark,.empty-mark{aspect-ratio:1;color:#fff;background:var(--mint);border-radius:8px;place-items:center;width:44px;font-weight:800;display:grid}.eyebrow{color:var(--coral);letter-spacing:0;text-transform:uppercase;font-size:12px;font-weight:700}.auth-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:32px;display:grid}.auth-form{gap:14px;display:grid}.auth-form h2{margin:0 0 4px;font-size:18px}.auth-form label,.source-form label{color:var(--muted);gap:6px;font-size:13px;font-weight:700;display:grid}input,textarea{border:1px solid var(--line);width:100%;color:var(--ink);background:#fffdf8;border-radius:8px;outline:none}input{min-height:44px;padding:0 12px}textarea{resize:none;padding:12px;line-height:1.5}input:focus,textarea:focus{border-color:var(--mint);box-shadow:0 0 0 3px #0f766e24}.primary-button,.ghost-button,.secondary-button{border:0;border-radius:8px;min-height:44px;padding:0 16px;font-weight:800}.primary-button{color:#fff;background:var(--mint)}.ghost-button{color:var(--mint-ink);background:#ddeee8}.secondary-button{color:#fff;background:var(--blue)}.notice{border-radius:8px;margin:18px 0 0;padding:12px 14px;font-size:14px}.notice-error,.inline-error{color:#7a1f12;background:#ffe3dc}.notice-info{color:var(--mint-ink);background:#dff3ee}.app-shell{grid-template-columns:330px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{border-right:1px solid var(--line);background:#fff8e9;grid-template-rows:auto minmax(100px,1fr) auto auto auto;gap:18px;min-height:100vh;padding:18px;display:grid}.sidebar-header,.account-row,.section-title{align-items:center;gap:10px;display:flex}.sidebar-header{justify-content:space-between}.icon-button,.send-button{aspect-ratio:1;border:1px solid var(--line);width:42px;color:var(--ink);background:#fffdf8;border-radius:8px;flex:none;place-items:center;display:grid}.icon-button:hover,.send-button:hover{border-color:var(--mint)}.icon{fill:currentColor;width:20px;height:20px}.conversation-list{align-content:start;gap:8px;display:grid;overflow-y:auto}.conversation-item{width:100%;min-height:42px;color:var(--ink);text-align:left;text-overflow:ellipsis;white-space:nowrap;background:0 0;border:1px solid #0000;border-radius:8px;padding:0 12px;overflow:hidden}.conversation-item:hover,.conversation-item.active{border-color:var(--line);background:#fffdf8}.source-form{gap:10px;display:grid}.section-title{color:var(--muted);font-size:13px;font-weight:800}.document-list{gap:8px;max-height:150px;display:grid;overflow:auto}.document-item{border-left:3px solid var(--coral);background:#fffdf8;gap:3px;padding:8px 10px;display:grid}.document-item span{text-overflow:ellipsis;white-space:nowrap;font-size:13px;font-weight:700;overflow:hidden}.document-item small{color:var(--muted)}.account-row{border-top:1px solid var(--line);min-width:0;padding-top:14px}.avatar{aspect-ratio:1;color:#fff;background:var(--coral);border-radius:8px;place-items:center;width:34px;font-size:13px;font-weight:900;display:grid}.account-email{min-width:0;color:var(--muted);text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:13px;overflow:hidden}.chat-panel{background:#f9f6ef;grid-template-rows:minmax(0,1fr) auto auto;min-height:100vh;display:grid}.chat-stream{align-content:start;gap:18px;padding:34px min(5vw,72px);display:grid;overflow-y:auto}.empty-state{color:var(--muted);justify-items:center;gap:14px;margin:18vh auto 0;display:grid}.empty-state h2{color:var(--ink);margin:0;font-size:22px}.message-row{display:flex}.message-row.user{justify-content:flex-end}.message-row.assistant{justify-content:flex-start}.message-bubble{border:1px solid var(--line);background:#fffdf8;border-radius:8px;width:fit-content;max-width:min(760px,82%);padding:14px 16px;box-shadow:0 8px 28px #27241c14}.message-row.user .message-bubble{color:#fff;border-color:var(--mint);background:var(--mint)}.message-bubble p{white-space:pre-wrap;overflow-wrap:anywhere;margin:0;line-height:1.65}.sources{gap:8px;margin-top:14px;display:grid}.sources details{border-top:1px solid var(--line);padding-top:8px}.sources summary{color:var(--blue);font-size:13px;font-weight:800}.sources p{color:var(--muted);margin-top:8px;font-size:13px}.inline-error{border-radius:8px;margin:0 min(5vw,72px) 10px;padding:10px 12px;font-size:14px}.composer{border-top:1px solid var(--line);background:#fffaf0eb;grid-template-columns:minmax(0,1fr) auto;gap:10px;padding:14px min(5vw,72px) 18px;display:grid}.composer textarea{min-height:48px;max-height:160px}.send-button{color:#fff;border-color:var(--mint);background:var(--mint);width:48px}@media (max-width:920px){.app-shell{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--line);grid-template-rows:auto auto auto auto;min-height:auto}.conversation-list{grid-auto-columns:minmax(160px,220px);grid-auto-flow:column;overflow-x:auto}.source-form{grid-template-columns:minmax(0,1fr) auto}.source-form .section-title,.source-form textarea{grid-column:1/-1}.document-list{display:none}.chat-panel{min-height:calc(100vh - 430px)}}@media (max-width:640px){.auth-page{padding:18px}.auth-panel{padding:20px}.auth-grid{grid-template-columns:1fr}.chat-stream{padding:22px 14px}.message-bubble{max-width:94%}.composer{padding:12px 14px 14px}}