:root{--bg:#080b10;--surface:#10161eb8;--surface-soft:#ffffff0b;--border:#c7d8e81f;--border-strong:#c7d8e838;--text:#f4f7fb;--text-secondary:#aebbc8;--text-muted:#768391;--accent:#8bd9cc;--accent-soft:#8bd9cc1c;--radius:8px;--page-max:1120px}*{box-sizing:border-box}html{background:var(--bg);min-width:320px}body{min-height:100vh;color:var(--text);background:radial-gradient(circle at 50% 0,#8bd9cc14,#0000 30rem),linear-gradient(#080b10 0%,#0a0f15 55%,#080b10 100%);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}button{color:inherit}button:disabled{cursor:not-allowed}h1,p{margin:0}.page-shell{grid-template-rows:auto 1fr auto;min-height:100vh;padding:18px 22px;display:grid}.top-header,.chat-workspace,.site-footer{width:100%;max-width:var(--page-max);margin:0 auto}.top-header{justify-content:space-between;align-items:center;gap:20px;min-height:52px;display:flex}.header-brand,.header-nav{align-items:center;gap:14px;display:flex}.brand-lockup{color:var(--text);align-items:center;gap:12px;display:inline-flex}.brand-mark{filter:invert();width:44px;height:44px}.brand-wordmark{color:var(--text);font-size:30px;font-weight:760;line-height:1}.brand-text-fallback{min-height:28px;color:var(--text);align-items:center;font-size:24px;font-weight:750;line-height:1;display:inline-flex}.header-nav{color:var(--text-secondary);font-size:14px;font-weight:600}.header-nav a,.header-nav button,.site-footer a{color:var(--text-secondary);background:0 0;border:0;padding:6px 2px}.header-nav button,.header-nav a:hover,.header-nav button:hover,.site-footer a:hover{color:var(--text)}.chat-workspace{align-content:center;justify-items:center;gap:22px;min-height:calc(100vh - 180px);padding:0 0 216px;display:grid}.empty-state{text-align:center;justify-items:center;gap:9px;display:grid}.empty-state h1{color:var(--text);letter-spacing:0;font-size:clamp(34px,6vw,54px);line-height:1.06}.empty-state p{color:var(--text-muted);font-size:14px}.prompt-chips{flex-wrap:wrap;justify-content:center;gap:10px;max-width:720px;display:flex}.prompt-chips button{min-height:38px;color:var(--text-secondary);background:var(--surface-soft);border:1px solid var(--border);border-radius:999px;padding:0 14px}.prompt-chips button:hover{color:var(--text);border-color:var(--border-strong)}.chat-input-shell{background:var(--surface);border:1px solid var(--border);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:18px;grid-template-columns:minmax(0,1fr) auto;gap:8px;width:min(760px,100%);margin-top:10px;padding:8px;display:grid;box-shadow:0 20px 70px #0000003d}.chat-input-shell input{width:100%;min-height:44px;color:var(--text);background:0 0;border:0;outline:0;padding:0 12px}.chat-input-shell input::placeholder{color:var(--text-muted)}.chat-input-shell button{color:#080b10d6;background:var(--accent);opacity:.56;border:0;border-radius:12px;min-width:72px;min-height:44px;font-weight:750}.chat-input-shell p{color:var(--text-muted);grid-column:1/-1;padding:0 12px 4px;font-size:12px}.site-footer{min-height:32px;color:var(--text-muted);justify-content:center;align-items:center;font-size:12px;display:flex}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}@media (max-width:720px){.page-shell{padding:14px 16px}.top-header,.site-footer{flex-direction:column;align-items:flex-start}.header-nav{flex-wrap:wrap;justify-content:flex-start;width:100%}.chat-workspace{min-height:calc(100vh - 250px);padding:24px 0 56px}.prompt-chips{width:100%;display:grid}.chat-input-shell{border-radius:var(--radius);grid-template-columns:1fr}.chat-input-shell button{width:100%}}