*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { line-height: 1.6; color: #1a1a1a; background: #fff; }
img { max-width: 100%; height: auto; display: block; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
pre { overflow-x: auto; }
code { font-family: "Fira Code", "Cascadia Code", Consolas, monospace; font-size: 0.9em; }
table { border-collapse: collapse; width: 100%; }
th, td { border: 1px solid #e2e8f0; padding: 8px 12px; text-align: left; }
th { background: #f8fafc; }