/* Light/dark theme + the sliding theme toggle, shared by every page.
   Dark is the site's native palette (defined per page in :root). This file is
   linked after each page's own styles and only overrides what light mode needs.
   The active theme is set on <html data-theme="light|dark"> by assets/theme.js
   (and by the tiny inline snippet in each <head> that prevents a flash). */

:root[data-theme="dark"] { color-scheme: dark; }

:root[data-theme="light"] {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --text: #12151f;
  --muted: #4a5163;
  --accent: #4f46e5;
  --border: #d7dae6;
  color-scheme: light;
}
:root[data-theme="light"] a { color: #4338ca; }
:root[data-theme="light"] .cta,
:root[data-theme="light"] .cta:hover { color: #fff; }
:root[data-theme="light"] code,
:root[data-theme="light"] pre { background: #eceef6; }
:root[data-theme="light"] pre code { background: none; }
:root[data-theme="light"] .copy-btn.copied {
  color: #047857;
  border-color: #047857;
}
:root[data-theme="light"] .related a,
:root[data-theme="light"] header a { color: var(--text); }
:root[data-theme="light"] header nav a { color: var(--muted); }

/* Smooth cross-fade, enabled by theme.js only while the user is toggling so
   the initial paint never animates. */
:root.theme-transition,
:root.theme-transition *,
:root.theme-transition *::before,
:root.theme-transition *::after {
  transition: background-color 250ms ease, color 250ms ease,
    border-color 250ms ease, fill 250ms ease, stroke 250ms ease !important;
}

/* Toggle switch */
.theme-toggle {
  --tt-track: #cbd5e1;
  --tt-track-border: #94a3b8;
  --tt-icon: #475569;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  vertical-align: middle;
  flex-shrink: 0;
  width: 54px;
  height: 28px;
  margin-left: 16px;
  padding: 0 7px;
  font: 14px/1 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--tt-icon);
  background: var(--tt-track);
  border: 1px solid var(--tt-track-border);
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 250ms ease, border-color 250ms ease;
  -webkit-tap-highlight-color: transparent;
}
.theme-toggle[aria-checked="true"] {
  --tt-track: #4f46e5;
  --tt-track-border: #6366f1;
  --tt-icon: #e0e7ff;
}
.theme-toggle:focus-visible {
  outline: 2px solid #818cf8;
  outline-offset: 2px;
}
.theme-toggle__icon {
  position: relative;
  z-index: 1;
  pointer-events: none;
}
.theme-toggle__thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  transition: transform 250ms ease;
  pointer-events: none;
}
.theme-toggle[aria-checked="true"] .theme-toggle__thumb {
  transform: translateX(26px);
}
/* The icon under the thumb is hidden; the other stays visible on the track. */
.theme-toggle[aria-checked="false"] .theme-toggle__icon--sun,
.theme-toggle[aria-checked="true"] .theme-toggle__icon--moon {
  opacity: 0;
}
.theme-toggle__icon {
  transition: opacity 250ms ease;
}

@media (max-width: 720px) {
  /* Nav wraps onto its own row on small screens; sit inline after the links. */
  .theme-toggle { margin-left: 4px; }
}
@media (prefers-reduced-motion: reduce) {
  .theme-toggle,
  .theme-toggle__thumb,
  .theme-toggle__icon,
  :root.theme-transition,
  :root.theme-transition *,
  :root.theme-transition *::before,
  :root.theme-transition *::after {
    transition: none !important;
  }
}

/* Let the header nav wrap on narrow screens so every link (and the toggle) stays reachable. */
@media (max-width: 720px) {
  header { flex-wrap: wrap; }
  header nav { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; }
  header nav a { margin-left: 0 !important; margin-right: 0 !important; white-space: nowrap; }
}

/* "Coming Soon" pill used in the header nav (matches the difffind-site pill). */
.soon-pill {
  display: inline-block;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.4;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: 2px 7px;
  white-space: nowrap;
  vertical-align: middle;
}