*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  font-family: var(--font-universalsans);
  font-weight: var(--font-weight-regular);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  color: var(--color-frost-white);
  background-color: var(--color-deep-midnight);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

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

input {
  font-family: inherit;
  font-size: inherit;
}

::selection {
  background: var(--color-electric-blue);
  color: var(--color-frost-white);
}

/* Typography utilities */
.text-display {
  font-size: var(--text-display);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
}

.text-heading-lg {
  font-size: var(--text-heading-lg);
  line-height: var(--leading-heading-lg);
  letter-spacing: var(--tracking-heading-lg);
}

.text-heading {
  font-size: var(--text-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.text-subheading {
  font-size: var(--text-subheading);
  line-height: var(--leading-subheading);
  letter-spacing: var(--tracking-subheading);
}

.text-body-sm {
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
  letter-spacing: var(--tracking-body-sm);
}

.text-caption {
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  letter-spacing: var(--tracking-caption);
}

.text-mono {
  font-family: var(--font-geistmono);
}

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

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

/* Skip-to-content link — visible only when focused via keyboard. */
.skip-link {
  position: absolute;
  top: var(--spacing-12);
  left: var(--spacing-12);
  z-index: 100;
  padding: var(--spacing-12) var(--spacing-20);
  background: var(--color-frost-white);
  color: #0a0a0a;
  font-family: var(--font-universalsans);
  font-size: var(--text-body-sm);
  border-radius: var(--radius-buttons);
  transform: translateY(calc(-100% - var(--spacing-12)));
  transition: transform 200ms ease;
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--color-electric-blue);
  outline-offset: 2px;
}