/* Base: Reset, Typography, Accessibility & Global Defaults */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-latin-0.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-latin-1.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration-skip-ink: auto;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: var(--tracking-headline);
  text-wrap: balance;
  margin: 0;
}

h1 { letter-spacing: var(--tracking-tight); }
h2 { letter-spacing: var(--tracking-tight); }

p, ul, ol, dl, figure, blockquote {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

::selection {
  background: var(--dark);
  color: #ffffff;
}

.container {
  width: min(calc(100% - 2 * var(--gutter)), var(--max));
  margin-inline: auto;
}

/* Accessible Focus States */
:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.section-dark :focus-visible,
.site-footer :focus-visible,
.final-panel :focus-visible {
  outline-color: var(--teal-on-dark);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--dark);
  color: #ffffff;
  padding: 14px 20px;
  z-index: 1000;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  text-decoration: none;
  border: 1px solid var(--line-dark-strong);
}

.skip-link:focus {
  left: 16px;
  top: 16px;
}

/* Accessibility / Utility Helpers */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}