:root { color-scheme: light dark; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
* { box-sizing: border-box; }
html, body { margin: 0; min-width: 0; overflow-x: hidden; }
body { background: Canvas; color: CanvasText; }
main { width: min(100% - 2rem, 46rem); margin: 0 auto; padding: 2rem 0 3rem; }
h1 { margin: .25rem 0 .75rem; font-size: clamp(1.85rem, 7vw, 3rem); line-height: 1.08; }
h2 { font-size: 1.15rem; }
p, li { line-height: 1.55; }
.eyebrow { margin: 0; color: #4763c9; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; font-size: .75rem; }
form, #result, .limits { margin-top: 1.5rem; padding: 1.15rem; border: 1px solid color-mix(in srgb, CanvasText 22%, transparent); border-radius: .8rem; }
fieldset { display: flex; flex-wrap: wrap; gap: .75rem 1.25rem; margin: 0 0 1rem; padding: .75rem; }
.mode { display: inline-flex; align-items: center; gap: .45rem; font-weight: 600; }
label, legend { font-weight: 700; }
input[type="file"], textarea, select { display: block; width: 100%; max-width: 100%; margin-top: .4rem; padding: .7rem; color: inherit; background: Canvas; border: 1px solid color-mix(in srgb, CanvasText 35%, transparent); border-radius: .5rem; font: inherit; }
textarea { resize: vertical; min-height: 10rem; }
#file-panel, #paste-panel { margin-bottom: 1rem; }
.hint { margin: .4rem 0 0; color: color-mix(in srgb, CanvasText 68%, transparent); font-size: .9rem; }
.actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.1rem; }
button, #download { min-height: 2.75rem; padding: .72rem 1rem; border: 0; border-radius: .55rem; background: #3156d3; color: white; font: inherit; font-weight: 700; cursor: pointer; text-decoration: none; text-align: center; }
button.secondary { background: color-mix(in srgb, CanvasText 14%, Canvas); color: CanvasText; }
button:disabled { opacity: .55; cursor: wait; }
#status { min-height: 1.5rem; }
#error { padding: .8rem; border-left: .3rem solid #bd2c2c; background: color-mix(in srgb, #bd2c2c 10%, Canvas); }
#result { border-color: #258052; }
#counts { overflow-wrap: anywhere; }
.limits ul { padding-left: 1.25rem; }
[hidden] { display: none !important; }
@media (max-width: 360px) {
  main { width: 100%; padding: 1rem .75rem 2rem; }
  form, #result, .limits { padding: .85rem; border-radius: .55rem; }
  fieldset { display: grid; }
  .actions { display: grid; }
  button, #download { width: 100%; }
}