:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--bg:#f5f4f2;--panel:#fff;--border:#e2e0dc;--text:#1f1d1a;--muted:#767268;--accent:#b5652f;--accent-contrast:#fff;--bubble-user:#eee7dd;--bubble-assistant:#fff;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}#root{height:100vh}button{cursor:pointer;font-family:inherit}input{font-family:inherit}.login-screen{justify-content:center;align-items:center;height:100%;display:flex}.login-card{background:var(--panel);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:.75rem;width:320px;padding:2rem;display:flex}.login-card h1{margin:0;font-size:1.3rem}.subtitle{color:var(--muted);margin:0 0 .5rem;font-size:.85rem}.login-card label{color:var(--muted);flex-direction:column;gap:.25rem;font-size:.85rem;display:flex}.login-card input{border:1px solid var(--border);border-radius:8px;padding:.5rem;font-size:1rem}.login-card button{background:var(--accent);color:var(--accent-contrast);border:none;border-radius:8px;margin-top:.5rem;padding:.6rem;font-size:1rem}.error{color:#b3261e;margin:0;font-size:.85rem}.chat-screen{grid-template-columns:260px 1fr;height:100%;display:grid}.sidebar{border-right:1px solid var(--border);flex-direction:column;gap:.75rem;padding:1rem;display:flex;overflow-y:auto}.sidebar-header{justify-content:space-between;align-items:flex-start;display:flex}.muted{color:var(--muted);font-size:.8rem}.link-button{color:var(--accent);background:0 0;border:none;font-size:.85rem}.new-conversation{border:1px dashed var(--accent);color:var(--accent);background:0 0;border-radius:8px;padding:.6rem}.conversation-list{flex-direction:column;gap:.25rem;margin:0;padding:0;list-style:none;display:flex}.conversation-list button{text-align:left;width:100%;color:var(--text);background:0 0;border:none;border-radius:8px;padding:.5rem}.conversation-list button.active{background:var(--bubble-user)}.chat-main{flex-direction:column;height:100vh;display:flex}.empty-state{color:var(--muted);margin:auto}.messages{flex-direction:column;flex:1;gap:.75rem;padding:1.5rem;display:flex;overflow-y:auto}.bubble{border-radius:12px;max-width:640px;padding:.75rem 1rem}.bubble.user{background:var(--bubble-user);align-self:flex-end}.bubble.assistant{background:var(--bubble-assistant);border:1px solid var(--border);align-self:flex-start}.bubble-content{white-space:pre-wrap}.pdf-preview{border:1px solid var(--border);border-radius:8px;width:100%;min-width:480px;height:500px;margin-top:.75rem}.composer{border-top:1px solid var(--border);gap:.5rem;padding:1rem 1.5rem;display:flex}.composer input{border:1px solid var(--border);border-radius:8px;flex:1;padding:.6rem .8rem;font-size:1rem}.composer button{background:var(--accent);color:var(--accent-contrast);border:none;border-radius:8px;padding:.6rem 1.2rem}.composer button:disabled{opacity:.5;cursor:default}