/*
 * Shared shell only. Page-specific composition remains in each page stylesheet.
 * All selectors are opt-in so archived/static documents keep their original look.
 */

body[data-longtide-app] {
  min-width: 20rem;
  margin: 0;
  background: var(--lt-sea-950);
  color: var(--lt-text);
  font-family: var(--lt-font-sans);
  font-size: var(--lt-text-base);
  line-height: 1.62;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body[data-longtide-app] :where(h1, h2, h3) {
  color: var(--lt-text);
  font-family: var(--lt-font-serif);
  font-weight: 520;
  letter-spacing: -0.018em;
  text-wrap: balance;
}

body[data-longtide-app] ::selection {
  background: rgba(199, 154, 88, 0.3);
  color: var(--lt-text);
}

body[data-longtide-app] :where(button, input, textarea, select) {
  font: inherit;
}

body[data-longtide-app] :where(button, a, input, textarea, select, summary):focus-visible {
  outline: 2px solid var(--lt-brass-bright);
  outline-offset: 3px;
}

body[data-longtide-app] :where(button, [role="button"], input[type="button"], input[type="submit"]) {
  -webkit-tap-highlight-color: transparent;
}

body[data-longtide-app] :where(.topbar, .masthead) {
  border-bottom-color: var(--lt-divider);
  background: rgba(7, 18, 20, 0.9);
  box-shadow: 0 1px rgba(255, 255, 255, 0.025);
  backdrop-filter: blur(18px) saturate(118%);
  -webkit-backdrop-filter: blur(18px) saturate(118%);
}

body[data-longtide-app] :where(.topnav, .site-nav, .section-tabs) a {
  min-height: var(--lt-hit);
  color: var(--lt-text-muted);
  font-family: var(--lt-font-sans);
  font-size: var(--lt-text-sm);
  letter-spacing: 0.035em;
  transition:
    color var(--lt-motion-fast) var(--lt-ease-standard),
    background-color var(--lt-motion-fast) var(--lt-ease-standard);
}

body[data-longtide-app] :where(.topnav, .site-nav, .section-tabs) a:hover,
body[data-longtide-app] :where(.topnav, .site-nav, .section-tabs) a.is-active,
body[data-longtide-app] :where(.topnav, .site-nav, .section-tabs) a[aria-current="page"] {
  color: var(--lt-text);
}

body[data-longtide-app] :where(.eyebrow, .kicker) {
  color: var(--lt-text-muted);
  font-family: var(--lt-font-sans);
  font-size: var(--lt-text-xs);
  font-weight: 500;
  letter-spacing: 0.025em;
}

/* Context is available on demand; captions do not compete with the page. */
body[data-longtide-app] .inline-help {
  grid-column: 1 / -1;
  margin-block: 0.5rem 1rem;
  color: var(--lt-text-muted);
  font-size: var(--lt-text-sm);
}

body[data-longtide-app] .inline-help > summary {
  min-height: var(--lt-hit);
  width: fit-content;
  align-content: center;
  cursor: pointer;
}

body[data-longtide-app] .inline-help > p {
  max-width: 70ch;
  margin-block: 0.5rem;
  line-height: 1.7;
}

body[data-longtide-app] .inline-help > .rule-note {
  border: 0;
  padding: 0;
  background: transparent;
}

body[data-longtide-app] :where(.sr-only, .visually-hidden) {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

body[data-longtide-app] {
  scrollbar-color: rgba(199, 154, 88, 0.38) transparent;
  scrollbar-width: thin;
}

body[data-longtide-app] ::-webkit-scrollbar {
  width: 0.65rem;
  height: 0.65rem;
}

body[data-longtide-app] ::-webkit-scrollbar-thumb {
  border: 0.18rem solid transparent;
  border-radius: var(--lt-radius-pill);
  background: rgba(199, 154, 88, 0.38);
  background-clip: padding-box;
}

body[data-longtide-app] ::-webkit-scrollbar-track {
  background: transparent;
}

@media (max-width: 44rem) {
  body[data-longtide-app] :where(.topnav, .site-nav, .section-tabs) a {
    font-size: 0.875rem;
  }
}

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

@media (forced-colors: active) {
  body[data-longtide-app] :where(button, a, input, textarea, select, summary):focus-visible {
    outline-color: Highlight;
  }
}

@view-transition {
  navigation: auto;
}

::view-transition-old(root) {
  animation: lt-page-away var(--lt-motion-fast, 150ms) ease both;
}

::view-transition-new(root) {
  animation: lt-page-arrive var(--lt-motion-page, 220ms) var(--lt-ease-out, ease-out) both;
}

@keyframes lt-page-away {
  to { opacity: 0; transform: translateY(-0.2rem); }
}

@keyframes lt-page-arrive {
  from { opacity: 0; transform: translateY(0.25rem); }
}