:root{--bg:#0f1720;--surface:#1b2733;--surface-2:#24333f;--text:#f2f5f8;--muted:#b8c4d0;--accent:#4fb0ff;--accent-text:#06202f;--border:#38495a}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.5}.page{max-width:760px;margin:0 auto;padding:24px 16px 48px}.hero{text-align:center;margin-bottom:32px}.hero-slim{margin-bottom:24px}.hero h1{font-size:2rem;line-height:1.2;margin:0 0 8px;letter-spacing:-.01em}.tagline{color:var(--muted);max-width:55ch;margin:0 auto}h2{font-size:1.35rem;line-height:1.2;margin:0 0 16px}.chat-shell,.intro,.notice,.start{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:24px;margin-bottom:24px}.how,.wizard-steps{padding-left:1.25rem;margin:0}.how li{margin-bottom:8px}.wizard-steps{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}.wizard-steps 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14px}.correction-heading{display:block;font-size:.75rem;font-weight:600;color:var(--accent);margin-bottom:4px}.correction-text{margin:0;white-space:pre-wrap;word-break:break-word;color:var(--muted);font-size:.95rem;line-height:1.5}.chat-thinking{margin:8px;font-style:italic}.chat-error{background:#3a1f1f;border:1px solid #7a3b3b;color:#ffd9d9;border-radius:8px}.chat-error,.chat-maintenance{padding:12px 14px;margin:0 0 12px;font-size:.95rem}.chat-maintenance{background:var(--surface-2);border:1px solid var(--border);color:var(--text);border-radius:8px;line-height:1.5}.chat-input{display:flex;gap:8px;align-items:flex-end}.chat-textarea{flex:1 1;min-height:44px;padding:10px 12px;font:inherit;font-size:1rem;color:var(--text);background:var(--surface-2);border:1px solid var(--border);border-radius:8px;resize:vertical}.chat-textarea:focus-visible{border-color:var(--accent);outline:2px solid 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