/* ferro base: reset, typography, focus, scrollbars, syntax classes, utilities */
*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg-chrome);
  color: var(--fg);
  font: 400 var(--fs-md)/var(--lh) var(--font-ui);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow: hidden;
}

button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
button:disabled { cursor: default; }
a { color: inherit; text-decoration: underline; text-decoration-color: var(--border-strong); text-underline-offset: 2px; }
a:hover { text-decoration-color: currentColor; }
h1, h2, h3, h4, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
code, kbd, pre, .mono { font-family: var(--font-mono); }
[hidden] { display: none !important; }

::selection { background: var(--selection); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: -2px;
  border-radius: var(--r-sm);
}

/* thin, quiet scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--scroll-thumb) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-corner { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--scroll-thumb);
  border: 3px solid transparent;
  background-clip: content-box;
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: var(--scroll-thumb-hover); background-clip: content-box; }

/* icons (built by src/ui/icons.js) */
svg.i {
  width: var(--icon);
  height: var(--icon);
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: var(--icon-stroke);
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: middle;
}
svg.i.sm { width: 14px; height: 14px; }
svg.i.xs { width: 12px; height: 12px; }
svg.i.lg { width: 20px; height: 20px; }
svg.i.xl { width: 28px; height: 28px; stroke-width: 1.5; }

/* syntax highlight classes */
.t-c { color: var(--syn-comment); font-style: italic; }
.t-cd { color: var(--syn-doc); font-style: italic; }
.t-k { color: var(--syn-keyword); }
.t-o { color: var(--syn-operator); }
.t-p { color: var(--syn-punct); }
.t-s { color: var(--syn-string); }
.t-se { color: var(--syn-escape); }
.t-re { color: var(--syn-regex); }
.t-n { color: var(--syn-number); }
.t-b { color: var(--syn-constant); }
.t-f { color: var(--syn-function); }
.t-fd { color: var(--syn-function-def); font-weight: 600; }
.t-t { color: var(--syn-type); }
.t-tb { color: var(--syn-type-builtin); }
.t-v { color: var(--syn-variable); }
.t-vp { color: var(--syn-param); }
.t-vb { color: var(--syn-variable-builtin); font-style: italic; }
.t-pr { color: var(--syn-property); }
.t-m { color: var(--syn-macro); }
.t-ns { color: var(--syn-namespace); }
.t-tg { color: var(--syn-tag); }
.t-at { color: var(--syn-attr); }
.t-h { color: var(--syn-heading); font-weight: 600; }
.t-em { color: var(--syn-emphasis); font-style: italic; }
.t-st { color: var(--syn-strong); font-weight: 700; }
.t-l { color: var(--syn-link); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--syn-link) 45%, transparent); }
.t-ins { color: var(--syn-inserted); }
.t-del { color: var(--syn-deleted); }
.t-err { color: var(--syn-error); text-decoration: wavy underline; text-decoration-color: var(--syn-error); }

/* CSS Custom Highlight API decorations */
::highlight(ferro-find) { background-color: color-mix(in srgb, var(--warn) 30%, transparent); color: inherit; }
::highlight(ferro-find-current) { background-color: color-mix(in srgb, var(--warn) 62%, transparent); color: var(--fg); }
::highlight(ferro-occ) { background-color: color-mix(in srgb, var(--fg) 12%, transparent); }
mark.hl-find { background: color-mix(in srgb, var(--warn) 30%, transparent); color: inherit; border-radius: 2px; }

/* utilities */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.muted { color: var(--fg-muted); }
.faint { color: var(--fg-faint); }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.grow { flex: 1 1 auto; min-width: 0; }
.row { display: flex; align-items: center; gap: var(--sp-4); }
.col { display: flex; flex-direction: column; }
.nowrap { white-space: nowrap; }
.num { font-variant-numeric: tabular-nums; }