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:root{--bg:#f5f1e8;--surface:#fffdf8;--surface-alt:#eee8dc;--surface-hover:#faf6ee;--border:#ddd5c8;--border-hover:#bcb1a1;--border-strong:#1d1b18;--text:#1d1b18;--text-secondary:#615c54;--text-tertiary:#8d8579;--text-on-accent:#fffdf8;--accent:#d95f35;--accent-hover:#bd4724;--accent-soft:#f5dfd5;--surface-rgb:255, 253, 248;--text-rgb:29, 27, 24;--accent-rgb:217, 95, 53;--error:#b83a35}*{box-sizing:border-box}html,body{background:var(--bg);min-height:100%;color:var(--text);margin:0}body{letter-spacing:.02em;font-family:Noto Sans SC,sans-serif;font-size:16px;line-height:1.8}button,textarea{font:inherit}button{color:inherit}.app-shell{grid-template-columns:264px minmax(0,1fr);min-height:100dvh;display:grid}.sidebar{border-right:1px solid var(--border);background:rgba(var(--surface-rgb), .72);flex-direction:column;height:100dvh;padding:28px 20px;display:flex;position:sticky;top:0}.brand{align-items:center;gap:11px;font-family:Noto Serif SC,serif;font-size:21px;font-weight:700;display:flex}.brand__mark{background:var(--accent);width:40px;height:40px;color:var(--text-on-accent);border-radius:12px;place-items:center;display:grid;transform:rotate(-4deg)}.new-chat{border:1px solid var(--border-strong);background:var(--text);min-height:46px;color:var(--text-on-accent);cursor:pointer;border-radius:12px;justify-content:center;align-items:center;gap:8px;margin-top:38px;transition:transform .16s,background-color .16s;display:flex}.new-chat:hover{background:var(--accent-hover);transform:translateY(-1px)}.download-app{border:1px solid var(--border-strong);min-height:44px;color:var(--text);border-radius:12px;justify-content:center;align-items:center;gap:8px;margin-top:10px;font-size:14px;font-weight:600;text-decoration:none;transition:transform .16s,background-color .16s;display:flex}.download-app:hover{background:var(--accent-soft);transform:translateY(-1px)}.new-chat:focus-visible,.download-app:focus-visible,.icon-button:focus-visible,.send-button:focus-visible,.tag:focus-visible,.copy-button:focus-visible{outline:3px solid rgba(var(--accent-rgb), .28);outline-offset:3px}.sidebar__section{margin-top:38px}.eyebrow{color:var(--accent-hover);letter-spacing:.16em;text-transform:uppercase;font-size:12px;font-weight:700}.sidebar-item{background:var(--accent-soft);text-align:left;cursor:pointer;border:0;border-radius:10px;width:100%;min-height:44px;margin-top:10px;padding:0 12px}.sidebar__note{color:var(--text-tertiary);margin-top:auto;font-family:Noto Serif SC,serif;font-size:13px}.workspace{grid-template-rows:1fr auto;min-width:0;height:100dvh;display:grid;overflow-y:auto}.conversation{width:min(100% - 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