:root{color-scheme:light;--bg: #f3efe6;--bg-accent: #e7f0ea;--ink: #1c2420;--muted: #5c6b63;--line: #cfd8d2;--panel: rgba(255, 255, 255, .78);--brand: #0f6b4c;--brand-ink: #083d2c;--danger: #9b2c2c;--user: #dff3ea;--assistant: #ffffff;--shadow: 0 18px 50px rgba(28, 36, 32, .08);font-family:DM Sans,system-ui,sans-serif;background:radial-gradient(1200px 600px at 10% -10%,#d9ebe1 0%,transparent 55%),radial-gradient(900px 500px at 100% 0%,#efe6d4 0%,transparent 50%),var(--bg);color:var(--ink)}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{min-height:100vh}button,input,textarea{font:inherit}.app-shell{max-width:920px;margin:0 auto;min-height:100vh;padding:28px 18px 40px;display:grid;gap:18px;grid-template-rows:auto 1fr}.brand-bar{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.brand-bar h1{margin:0;font-size:clamp(1.6rem,3vw,2.1rem);letter-spacing:-.03em;color:var(--brand-ink)}.brand-bar p{margin:4px 0 0;color:var(--muted);font-size:.95rem}.panel{background:var(--panel);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.login-panel{padding:28px;display:grid;gap:16px;align-content:start;max-width:480px;margin:40px auto 0}.login-panel label{display:grid;gap:8px;font-weight:600;font-size:.92rem}.login-panel input,.composer textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:#fff;color:var(--ink)}.login-panel input:focus,.composer textarea:focus{outline:2px solid color-mix(in srgb,var(--brand) 35%,white);border-color:var(--brand)}.hint{color:var(--muted);font-size:.9rem;line-height:1.45;margin:0}.error{color:var(--danger);background:#fdecec;border:1px solid #f2c6c6;border-radius:12px;padding:10px 12px;font-size:.9rem}.primary{appearance:none;border:0;border-radius:999px;background:var(--brand);color:#fff;font-weight:600;padding:12px 18px;cursor:pointer}.primary:disabled{opacity:.55;cursor:not-allowed}.ghost{appearance:none;border:1px solid var(--line);background:transparent;border-radius:999px;padding:8px 12px;cursor:pointer;color:var(--muted)}.chat-layout{display:grid;grid-template-rows:auto 1fr auto;min-height:min(78vh,860px);overflow:hidden}.chat-header{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line)}.chat-header .meta{font-family:IBM Plex Mono,ui-monospace,monospace;font-size:.75rem;color:var(--muted);word-break:break-all}.messages{overflow:auto;padding:18px;display:grid;gap:12px;align-content:start;background:linear-gradient(180deg,transparent,rgba(243,239,230,.35)),repeating-linear-gradient(-12deg,transparent,transparent 18px,rgba(15,107,76,.025) 18px,rgba(15,107,76,.025) 19px)}.bubble{max-width:min(720px,92%);border-radius:18px;padding:12px 14px;border:1px solid var(--line);line-height:1.5;white-space:pre-wrap}.bubble.user{justify-self:end;background:var(--user)}.bubble.assistant{justify-self:start;background:var(--assistant)}.bubble .role{display:block;font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:6px;font-weight:600}.tool-chip{display:inline-block;margin-top:8px;margin-right:6px;font-family:IBM Plex Mono,ui-monospace,monospace;font-size:.72rem;padding:4px 8px;border-radius:999px;background:var(--bg-accent);color:var(--brand-ink)}.status-line{color:var(--muted);font-size:.85rem;padding:0 18px 8px}.composer{display:grid;grid-template-columns:1fr auto;gap:10px;padding:14px 18px 18px;border-top:1px solid var(--line);background:#ffffffb3}.composer textarea{min-height:56px;resize:vertical}.empty{color:var(--muted);text-align:center;padding:48px 12px}