:root{color:#111827;background:#f3f4f6;font-family:Segoe UI,PingFang SC,sans-serif}body{margin:0}button,input,textarea{font:inherit}.app-shell{display:grid;gap:12px;padding:12px}.panel{background:#fff;border-radius:14px;padding:14px;box-shadow:0 10px 30px #0f172a14}.stack{display:grid;gap:10px}.field{display:grid;gap:6px}.field input,.composer textarea{width:100%;box-sizing:border-box;border:1px solid #d1d5db;border-radius:10px;padding:10px 12px}.toolbar,.composer{display:grid;gap:8px}.device-panel{display:grid;gap:12px}.device-list{list-style:none;padding:0;margin:0;display:grid;gap:8px}.device-item{display:flex;align-items:center;justify-content:space-between;gap:12px}.device-item p{margin:4px 0 0}.session-card,.message-card,.log-card{border:1px solid #e5e7eb;border-radius:10px;padding:10px 12px;background:#f9fafb}.session-card{display:grid;gap:4px;text-align:left}.session-card.active{border-color:#2563eb;background:#eff6ff}.muted{color:#6b7280}