:root { color-scheme:light dark; background:light-dark(#f3f2e9,#111210); color:light-dark(#191a17,#eeeee5); }
html,body { margin:0; min-height:100%; }
body { font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; }
button,select,a { -webkit-tap-highlight-color:transparent; }
button,a,select { cursor:pointer; }
button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible { outline:2px solid currentColor; outline-offset:4px; }
[hidden] { display:none !important; }
.study-toolbar { display:flex; align-items:center; flex-wrap:wrap; gap:20px; padding:16px 32px; border-bottom:1px solid color-mix(in srgb,currentColor 22%,transparent); font-size:14px; }
.study-toolbar a { color:inherit; text-underline-offset:4px; }
.study-toolbar label { display:flex; align-items:center; gap:8px; }
.study-toolbar select { background:transparent; color:inherit; border:1px solid color-mix(in srgb,currentColor 30%,transparent); border-radius:0; padding:10px; font:inherit; }
.study-toolbar input { accent-color:currentColor; }
@media(max-width:480px) { .study-toolbar { padding:16px 20px; gap:12px; } }