/* Self-hosted fonts — no external font CDN dependency */

@font-face {
  font-family: 'Big Shoulders Display';
  src: url('/assets/fonts/big-shoulders-display-var.woff2') format('woff2');
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('/assets/fonts/inter-var.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-400.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-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* Reset */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul[class], ol[class] { list-style: none; margin: 0; padding: 0; }
img, picture, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }

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

/* Base */

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--leading-tight);
  text-wrap: balance;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--text-display-lg); }
h2 { font-size: var(--text-display-md); }
h3 { font-size: var(--text-display-sm); }
h4 { font-size: var(--text-xl); font-weight: 600; }

p { max-width: 65ch; }
p.lead { font-size: var(--text-lg); color: var(--color-text-muted); }

code, kbd, .mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

a.link {
  color: var(--color-interactive);
  text-underline-offset: 3px;
  text-decoration: underline;
}
a.link:hover { color: var(--color-ink); }

:focus-visible {
  outline: 2px solid var(--color-cobalt);
  outline-offset: 2px;
}

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

.skip-link {
  position: absolute;
  left: 1rem; top: -3rem;
  background: var(--color-ink);
  color: var(--color-paper);
  padding: 0.75rem 1.25rem;
  z-index: 100;
  transition: top var(--duration-fast) var(--ease-out);
}
.skip-link:focus { top: 1rem; }