/* Shared host primitives for About, Playground, AI Workflow, and WIP.
   Index keeps its inlined copy. Do not load this from HtmlChrome.
   Tokens live in /styles/shell-tokens.css. */

::selection {
  background: var(--selection-bg);
  color: var(--selection-text);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: var(--grain-opacity);
  mix-blend-mode: var(--grain-blend);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.shell-accent {
  color: var(--color-theme-2);
}

.pill-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--button-cta-gap);
  box-sizing: border-box;
  white-space: nowrap;
  border-radius: var(--button-cta-radius);
  border: var(--button-cta-border-width) solid var(--pill-border);
  height: var(--button-cta-height);
  min-height: var(--button-cta-height);
  padding: 0 var(--button-cta-padding-inline);
  font-size: var(--button-cta-font-size);
  font-weight: var(--button-cta-font-weight);
  line-height: var(--button-cta-line-height);
  color: var(--pill-text);
  background: var(--pill-bg);
  transition:
    transform var(--duration-interaction) var(--ease),
    background-color var(--duration-interaction) var(--ease),
    color var(--duration-interaction) var(--ease),
    border-color var(--duration-interaction) var(--ease),
    box-shadow var(--duration-interaction) var(--ease);
}

.pill-btn:hover {
  background: var(--pill-hover-bg);
  color: var(--pill-hover-text);
  border-color: var(--pill-hover-bg);
  box-shadow: var(--pill-hover-shadow);
  transform: translateY(-2px);
}

.pill-btn:active {
  transform: translateY(0) scale(0.97);
}

.pill-btn svg {
  width: var(--button-cta-icon-size);
  height: var(--button-cta-icon-size);
  transition: transform var(--duration-interaction) var(--ease);
}

.pill-btn:hover svg {
  transform: translateX(3px);
}

/* .pill-btn--l is a semantic alias. Portfolio CTAs do not change geometry. */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity var(--duration-reveal) var(--ease),
    transform var(--duration-reveal) var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.contact-section {
  position: relative;
  background: transparent;
  padding: clamp(6rem, 14vh, 9rem) var(--content-inset) clamp(4.5rem, 10vh, 7rem);
}

.exp-contact {
  width: 100%;
  max-width: none;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.75rem 3rem;
}

.contact-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--duration-reveal) var(--ease),
    transform var(--duration-reveal) var(--ease);
}

.contact-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.exp-contact__heading {
  font-size: var(--font-size-contact); /* H3 contact */
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--color-text-1);
}

.exp-contact__links {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.75rem;
  font-size: var(--font-size-body); /* Body R */
  color: var(--color-text-3);
}

.exp-contact__links a {
  position: relative;
  transition: color var(--duration-fast) var(--ease);
}

.exp-contact__links a::before {
  content: "";
  position: absolute;
  inset-block: -0.75rem;
  inset-inline: -0.2rem;
}

.exp-contact__links a:hover {
  color: var(--color-text-1);
}

.exp-contact__links a:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
  border-radius: 3px;
}

.exp-contact__sep {
  color: var(--color-text-4, rgba(255, 255, 255, 0.25));
}

.site-footer__inner {
  width: 100%;
  max-width: none;
  margin: 0;
}

.exp-footer {
  --footer-rule-inset: 4rem;
  background: transparent;
  position: relative;
  padding: var(--footer-rule-inset) var(--content-inset) 2rem;
}

.exp-footer::before {
  content: "";
  position: absolute;
  top: var(--footer-rule-inset);
  left: 50%;
  width: 100vw;
  margin-left: -50vw;
  border-top: 1px solid var(--color-footer-divider);
  pointer-events: none;
}

.site-footer__note {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
  font-size: var(--font-size-footer-note); /* Caption/footer note */
  line-height: 1.6;
}

/* Separator + analytics note wrap as one unit on narrow screens. */
.site-footer__analytics {
  display: inline-flex;
  align-items: center;
  gap: inherit;
}

.site-footer__lab {
  color: inherit;
  text-decoration: none;
  opacity: 0.85;
}

.site-footer__lab:hover,
.site-footer__lab:focus-visible {
  opacity: 1;
  text-decoration: underline;
}

.site-footer__bottom {
  padding-top: 2rem;
  text-align: left;
  color: var(--color-text-3);
}

.site-footer__credit {
  margin-inline-start: 0.5em;
}

@media (max-width: 640px) {
  .exp-contact {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .contact-reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none;
  }

  .pill-btn,
  .pill-btn svg {
    transition: none;
  }

  .pill-btn:hover {
    transform: none;
  }

  .pill-btn:hover svg {
    transform: none;
  }
}