/* Thanh Giang typography — single system-font stack, zero font download. */
:root {
    --tg-font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Noto Sans", sans-serif;
}
html { font-family: var(--tg-font-ui); }
body,
button,
input,
select,
textarea { font-family: var(--tg-font-ui); }
body { text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
button,
input,
select,
textarea { letter-spacing: normal; }
/* Components inherit from body. Icon fonts keep their own explicit Font Awesome/Slick families. */