* { box-sizing: border-box; margin: 0; padding: 0; -webkit-font-smoothing: antialiased; }
html { scroll-behavior: smooth; }
body { background: var(--bg); font-family: var(--sans); color: var(--fg); font-size: var(--text-base); line-height: 1.5; overflow-x: hidden; transition: background 0.4s, color 0.4s; }
.page-frame { max-width: 1440px; margin: 0 auto; border-left: var(--border); border-right: var(--border); min-height: 100vh; }