:root{--brand-blue:#0a4c78;--brand-green:#1aa169;--bg:#fafbfc;--surface:#fff;--border:#e6e8eb;--fg:#0f172a;--muted:#6b7280;--btn-bg:var(--brand-blue);--btn-bg-hover:var(--brand-green);--btn-fg:#fff;--chip-bg:#e9f7f1;--chip-fg:#0b5c3c}*{box-sizing:border-box}body,html{padding:0;margin:0;background:var(--bg);color:var(--fg);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}a{color:var(--brand-blue);text-decoration:none}a:hover{text-decoration:underline}button{background:var(--btn-bg);color:var(--btn-fg);border:1px solid transparent;padding:.6rem .9rem;border-radius:.6rem;cursor:pointer;transition:background .15s ease}button:hover{background:var(--btn-bg-hover)}input,textarea{background:#fff;border:1px solid var(--border);color:var(--fg);padding:.6rem;border-radius:.5rem;width:100%}.container{max-width:1100px;margin:2rem auto;padding:0 1rem}.card{border:1px solid var(--border);border-radius:1rem;padding:1rem;background:var(--surface);box-shadow:0 1px 2px rgba(10,17,42,.04)}.row{align-items:center}.row,.stack{display:flex;gap:.75rem}.stack{flex-direction:column}.badge{font-size:.75rem;background:var(--chip-bg);color:var(--chip-fg);border:1px solid #cfede2;padding:.25rem .5rem;border-radius:.5rem}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace}.muted{color:var(--muted)}.brand-wrap{display:flex;flex-direction:column}.brand-header{font-weight:800;font-size:1.6rem;line-height:1.1;color:var(--brand-blue);margin:0}.brand-sub{margin:.15rem 0 0;font-size:.85rem;letter-spacing:3px;color:var(--brand-green)}.sidebar-title{font-weight:700;font-size:1.1rem;margin:0}.sidebar-item{text-align:left;width:100%}.sidebar-item .mono{font-size:.85rem}.chat-log{display:flex;flex-direction:column;gap:.5rem}.bubble{max-width:70%;padding:.6rem .9rem;border-radius:1rem;line-height:1.4;word-wrap:break-word;white-space:pre-wrap}.bubble-user{background:var(--brand-green);color:#fff;align-self:flex-end;border-bottom-right-radius:.2rem}.bubble-assistant{background:#f0f4f8;color:var(--fg);align-self:flex-start;border-bottom-left-radius:.2rem}.chat-layout{display:grid;grid-template-columns:320px 1fr;grid-gap:1rem;gap:1rem;align-items:start}.chat-main,.sidebar{width:100%}.chat-pane{height:60vh;min-height:380px;overflow-y:auto}.composer{position:-webkit-sticky;position:sticky;bottom:0;background:var(--surface);padding-top:.5rem}@media (max-width:900px){.chat-layout{grid-template-columns:1fr}.chat-pane{height:calc(100vh - 270px);min-height:320px}.sidebar .row>button,.sidebar .sidebar-item,.sidebar button{width:100%}}@media (max-width:420px){.brand-header{font-size:1.35rem}.brand-sub{font-size:.75rem;letter-spacing:2px}.chat-pane{height:calc(100vh - 250px)}}