/* ============================================
   RUNNIT — BASE STYLES
   Resets + typography + layout primitives shared
   by every page.
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.55;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

/* Broken-image fallback: hide the broken icon, show a soft placeholder tile */
img.has-error {
  background: var(--color-bg-alt);
  min-height: 120px;
  object-fit: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-ink);
  line-height: 1.15;
  margin: 0 0 var(--space-3);
}

h1 { font-size: var(--fs-3xl); font-weight: 700; }
h2 { font-size: var(--fs-2xl); font-weight: 700; }
h3 { font-size: var(--fs-lg); font-weight: 600; }
h4 { font-size: var(--fs-md); font-weight: 600; }

p {
  margin: 0 0 var(--space-3);
  color: var(--color-ink-soft);
  max-width: 62ch;
}

/* A very long word (a link, a name with no spaces) wraps instead of
   stretching the page sideways. */
h1, h2, h3, h4, p {
  overflow-wrap: anywhere;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Accessible focus state — visible everywhere, styled once */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

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

section {
  padding-block: var(--space-8);
}

section.section-alt {
  background: var(--color-bg-alt);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.section-head p {
  margin: var(--space-1) 0 0;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

@media (max-width: 640px) {
  h1 { font-size: var(--fs-2xl); }
  h2 { font-size: var(--fs-xl); }
  section { padding-block: var(--space-7); }
  .container { padding-inline: var(--space-4); }
}