:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--background:#f7f8fa;--foreground:#1f2933;--muted:#667085;--border:#d0d5dd;--surface:#fff;--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#b42318}*{box-sizing:border-box}body{background:var(--background);color:var(--foreground);margin:0;font-family:Arial,Helvetica,sans-serif}a{color:inherit}button,input{font:inherit}button{background:var(--primary);border:1px solid var(--primary);color:#fff;cursor:pointer;border-radius:6px;min-height:38px;padding:0 14px}button:disabled{cursor:not-allowed;opacity:.55}button:hover:not(:disabled){background:var(--primary-hover)}input{border:1px solid var(--border);border-radius:6px;min-height:38px;padding:8px 10px}.app-shell{min-height:100vh}.app-header{background:var(--surface);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:24px;min-height:56px;padding:0 24px;display:flex}.brand-link{font-weight:700;text-decoration:none}.nav-links{gap:12px;display:flex}.nav-link{color:var(--muted);border-radius:6px;padding:8px 10px;text-decoration:none}.nav-link[aria-current=page]{color:var(--foreground);background:#eef4ff}.page{max-width:920px;margin:0 auto;padding:48px 24px}.narrow-page{max-width:440px;margin:0 auto;padding:64px 24px}.form-stack,.panel-stack{gap:16px;display:grid}.field{gap:6px;display:grid}.checkbox-field,.actions-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.error-text{color:var(--danger)}.session-list{gap:12px;display:grid}.session-item{background:var(--surface);border:1px solid var(--border);border-radius:8px;justify-content:space-between;align-items:flex-start;gap:16px;padding:16px;display:flex}.session-item h2{margin:0 0 6px;font-size:18px}.session-item p{margin:0 0 4px}.session-actions{justify-items:end;gap:8px;display:grid}