*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
:root{
/* ── THEME TOKENS ──────────────────────────────────────────────
These are fallback defaults only (used if no theme file's
html[data-theme] rules match — e.g. data-theme is missing or
misspelled). Every file in /themes/ is loaded up front (see the
tags in ) and each one overrides these via a
higher-specificity html[data-theme="..."] selector. To add a new
theme: copy /themes/justwitter.css to /themes/yourtheme.css,
change the values, add its in , and add its name to
AVAILABLE_THEMES in the