:root{--bg:#e9ebef;--surface:#fff;--text:#1f2937;--muted:#6b7280;--border:#e3e6eb;--field:#eef2fb;--primary:#3656f5;--primary-hover:#2a47d9;--primary-soft:#eef2ff;--subtle:#f1f2f4;--ok:#16a34a;--ok-soft:#eaf7ee;--warn:#b45309;--warn-soft:#fdf4e7;--danger:#dc2626;--danger-soft:#fdecec;--shadow:0 1px 2px #1018280f, 0 8px 24px #10182814}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,Noto Sans Thai,Sukhumvit Set,Thonburi,sans-serif}a{color:var(--primary);text-decoration:none}h1{margin:0 0 4px;font-size:18px;font-weight:700}h2{margin:24px 0 10px;font-size:15px;font-weight:700}.muted{color:var(--muted)}.small{font-size:13px}.center{text-align:center}.mono{font-family:ui-monospace,Menlo,monospace}.shell{justify-content:center;align-items:center;min-height:100vh;padding:24px 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