/* ==========================================================================
   Base — reset, typography ramp, page shell
   ========================================================================== */

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

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

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

h1,
h2,
h3,
h4,
p,
figure {
  margin: 0;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: var(--space-12) var(--space-16);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  left: var(--space-16);
  top: var(--space-16);
}

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

/* --- type ramp ----------------------------------------------------------- */

.t-h1 {
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
}
.t-h2 {
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.t-h3 {
  font-size: var(--text-lg);
  font-weight: 500;
  line-height: var(--leading-snug);
}
.t-body-l {
  font-size: var(--text-lg);
  line-height: var(--leading-normal);
}
.t-body {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}
.t-body-s {
  font-size: var(--text-md);
  line-height: 1.55;
}
.t-caps {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  line-height: var(--leading-snug);
}
.t-mono {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  line-height: 1.5;
}
.t-mono-s {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.5;
}
.t-mono-xs {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.45;
}

.muted {
  color: var(--text-muted);
}
.secondary {
  color: var(--text-secondary);
}
.accent {
  color: var(--accent);
}

/* --- page shell ---------------------------------------------------------- */

.page {
  max-width: var(--page-max);
  margin-inline: auto;
  padding: var(--space-40) var(--page-pad) var(--space-48);
  display: flex;
  flex-direction: column;
  gap: var(--space-48);
}

/* App-shaped pages (the map) fill the viewport instead of scrolling. */
.page--app {
  height: 100vh;
  height: 100dvh;
  padding-bottom: var(--space-40);
  gap: var(--space-28, 28px);
  overflow: hidden;
}

.page__intro {
  max-width: 62ch;
  color: var(--text-secondary);
  font-size: var(--text-lg);
}

.stack {
  display: flex;
  flex-direction: column;
}

hr.rule {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* --- motion preferences -------------------------------------------------- */

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