:root{--primary: #2563eb;--primary-dark: #1d4ed8;--bg: #f8fafc;--card: #ffffff;--text: #1e293b;--text-muted: #64748b;--border: #e2e8f0}body{font-family:system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);margin:0}.message-user{background:var(--primary);color:#fff;border-radius:1rem 1rem .25rem;padding:.75rem 1rem;max-width:80%;margin-left:auto}.message-assistant{background:var(--card);border:1px solid var(--border);border-radius:1rem 1rem 1rem .25rem;padding:.75rem 1rem;max-width:80%}.specialty-card{background:var(--card);border:1px solid var(--border);border-radius:.75rem;padding:1.5rem;cursor:pointer;transition:all .2s}.specialty-card:hover{border-color:var(--primary);box-shadow:0 4px 12px #2563eb1a}