/* ==========================================================================
   BASE — reset, @font-face, foundational element styles
   ========================================================================== */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2");
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/ibm-plex-sans-latin-700-normal.woff2") format("woff2");
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Serif";
  src: url("../fonts/ibm-plex-serif-latin-400-normal.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Serif";
  src: url("../fonts/ibm-plex-serif-latin-600-normal.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Serif";
  src: url("../fonts/ibm-plex-serif-latin-700-normal.woff2") format("woff2");
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
  font-weight: 500; font-style: normal; font-display: swap;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--space-3);
  color: var(--color-ink-navy);
  letter-spacing: -0.01em;
}
h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-lg); }
p { margin: 0 0 var(--space-4); }
small, .text-sm { font-size: var(--text-sm); }

a { color: var(--color-ink-navy); text-decoration: none; }
a:hover { color: var(--color-brass); }

img { max-width: 100%; display: block; }

ul, ol { margin: 0 0 var(--space-4); padding-left: 1.25em; }

code, .mono, .font-mono { font-family: var(--font-mono); }

::selection { background: var(--color-brass-tint); color: var(--color-ink-navy); }

:focus-visible {
  outline: 2px solid var(--color-brass);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.icon {
  width: 1em;
  height: 1em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -0.15em;
  flex-shrink: 0;
}

/* Any ".mark" logo box: image always fills and preserves aspect ratio. */
.mark img { width: 100%; height: 100%; object-fit: contain; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink-navy);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  z-index: 1000;
  border-radius: 0 0 var(--radius-md) 0;
}
.skip-link:focus { left: 0; }

@media print {
  body { background: #fff; }
}