/* ================================================================
   SHARED COMPONENTS — Navbar & Footer styles
   Injected by shared/components.js
   ================================================================ */

/* ── Skip link (accessibility) ─────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -9999px;
  left: 1rem;
  z-index: 9999;
  padding: 0.6rem 1.2rem;
  background: var(--color-primary);
  color: #03060f;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  text-decoration: none;
  transition: top 0.1s;
}
.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ── Global focus indicator (keyboard-only) ─────────────────────── */
/* Remove browser default only when :focus-visible is supported     */
*:focus {
  outline: none;
}
*:focus-visible {
  outline: 2px solid var(--color-primary, #60a5fa);
  outline-offset: 3px;
  border-radius: 3px;
}

/* Stronger indicator for interactive elements */
a:focus-visible,
button:focus-visible,
[role="button"]:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary, #60a5fa);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.18);
  border-radius: var(--radius-sm, 6px);
}

/* Visually hidden utility (screen-reader only) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Navbar ────────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-h, 64px);
  z-index: 1000;
  background: transparent;
  transition:
    background var(--ease-base),
    box-shadow var(--ease-base),
    border-color var(--ease-base);
  border-bottom: 1px solid transparent;
}
.navbar.navbar-scrolled {
  background: rgba(8, 9, 14, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}
[data-theme="light"] .navbar.navbar-scrolled {
  background: rgba(240, 244, 248, 0.88);
}

.navbar-inner {
  max-width: var(--max-width, 1300px);
  margin: 0 auto;
  height: 100%;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}

/* Logo */
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}
.navbar-logo-icon {
  font-size: 1.4rem;
  line-height: 1;
}
.navbar-logo:hover {
  color: var(--color-primary);
}

/* Nav links list */
.navbar-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
}
.navbar-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-md);
  color: var(--color-muted-2);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition:
    color var(--ease-fast),
    background var(--ease-fast);
  white-space: nowrap;
}
.navbar-link:hover,
.navbar-link.active {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
}
[data-theme="light"] .navbar-link:hover,
[data-theme="light"] .navbar-link.active {
  background: rgba(0, 0, 0, 0.05);
}
.navbar-link-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.chevron {
  font-size: 0.7rem;
  transition: transform var(--ease-fast);
  display: inline-block;
}
.navbar-link-btn[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

/* Mega menu */
.has-mega {
  position: relative;
}
.mega-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: -1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 1.25rem;
  min-width: 520px;
  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity var(--ease-base),
    transform var(--ease-base);
  pointer-events: none;
}
.mega-menu:not([hidden]) {
  pointer-events: auto;
}
.mega-menu.mega-open {
  opacity: 1;
  transform: translateY(0);
}
.mega-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.4rem;
}
.mega-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--color-muted-2);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition:
    background var(--ease-fast),
    color var(--ease-fast);
}
.mega-item span {
  font-size: 1.1rem;
}
.mega-item:hover {
  background: rgba(255, 255, 255, 0.07);
  color: var(--color-text);
}
[data-theme="light"] .mega-item:hover {
  background: rgba(0, 0, 0, 0.05);
}

/* Actions (theme toggle + burger) */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

/* Language switcher */
.navbar-search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  min-width: 38px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  color: var(--color-muted-2);
  text-decoration: none;
  transition:
    background var(--ease-fast),
    border-color var(--ease-fast),
    color var(--ease-fast);
}
.navbar-search-btn:hover {
  background: rgba(96, 165, 250, 0.12);
  border-color: var(--color-border-hover);
  color: var(--color-primary);
}
.navbar-search-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}
.search-svg {
  display: block;
}
[data-theme="light"] .navbar-search-btn {
  background: rgba(0, 0, 0, 0.04);
}

.lang-switcher {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  min-width: 38px;
  padding: 0 0.6rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  color: var(--color-muted-2);
  text-decoration: none;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition:
    background var(--ease-fast),
    border-color var(--ease-fast),
    color var(--ease-fast);
  white-space: nowrap;
}
.lang-switcher:hover {
  background: rgba(96, 165, 250, 0.12);
  border-color: var(--color-border-hover);
  color: var(--color-primary);
}
[data-theme="light"] .lang-switcher {
  background: rgba(0, 0, 0, 0.04);
}
/* Mobile lang link */
.lang-link {
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition:
    background var(--ease-fast),
    color var(--ease-fast);
  margin-top: 0.25rem;
  border-top: 1px solid var(--color-border);
}
.lang-link:hover {
  background: rgba(96, 165, 250, 0.08);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  cursor: pointer;
  font-size: 1.1rem;
  transition:
    background var(--ease-fast),
    border-color var(--ease-fast);
  color: var(--color-text);
}
.theme-toggle:hover {
  background: rgba(96, 165, 250, 0.12);
  border-color: var(--color-border-hover);
}

/* Hamburger */
.navbar-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: 8px 9px;
  transition: background var(--ease-fast);
}
.navbar-burger span {
  display: block;
  height: 2px;
  background: var(--color-muted-2);
  border-radius: 2px;
  transition:
    transform var(--ease-base),
    opacity var(--ease-fast),
    width var(--ease-base);
  width: 100%;
}
.navbar-burger.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.navbar-burger.is-active span:nth-child(2) {
  opacity: 0;
  width: 0;
}
.navbar-burger.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}
.navbar-burger:hover {
  background: rgba(96, 165, 250, 0.1);
}

/* Mobile menu */
.navbar-mobile {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
/* Critical: CSS display:flex overrides the HTML [hidden] attribute by default.
   This rule enforces hidden state so the JS toggle actually works on mobile. */
.navbar-mobile[hidden] {
  display: none !important;
}
.mobile-link {
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--color-muted-2);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition:
    background var(--ease-fast),
    color var(--ease-fast);
}
.mobile-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text);
}

@media (max-width: 768px) {
  .navbar-links {
    display: none;
  }
  .navbar-burger {
    display: flex;
  }
  .mega-menu {
    display: none !important;
  }
}
@media (min-width: 769px) {
  .navbar-mobile {
    display: none !important;
  }
}

/* ── Footer ────────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 4rem 1.5rem 0;
  font-family: var(--font-main, system-ui);
  color: var(--color-text);
}
.footer-inner {
  max-width: var(--max-width, 1300px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  padding-bottom: 3rem;
}
@media (max-width: 768px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  max-width: 280px;
}
.footer-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.footer-tagline {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
@media (max-width: 600px) {
  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
  }
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-heading {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 0.25rem;
}
.footer-col a {
  font-size: 0.875rem;
  color: var(--color-muted-2);
  text-decoration: none;
  transition: color var(--ease-fast);
  padding: 0.15rem 0;
}
.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  max-width: var(--max-width, 1300px);
  margin: 0 auto;
  padding: 1.25rem 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  flex-wrap: wrap;
}
.footer-version {
  padding: 0.2rem 0.6rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-family: var(--font-mono, monospace);
}
.footer-github {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-github:hover {
  color: var(--color-primary);
}

/* ── Related articles (category pages) ─────────────────────────── */
.rel-arts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.rel-art-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--color-surface-2, #10131c);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl, 16px);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--color-text);
  transition:
    transform 0.18s,
    border-color 0.18s;
}
.rel-art-card:not(.soon):hover {
  transform: translateY(-3px);
  border-color: var(--cat-accent, var(--color-primary));
}
[data-theme="light"] .rel-art-card {
  background: var(--color-surface, #f3f4f6);
}
.rel-art-card.soon {
  opacity: 0.5;
  pointer-events: none;
}
.rel-art-type {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--cat-accent, var(--color-primary));
}
.rel-art-title {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
}
.rel-art-desc {
  font-size: 0.85rem;
  color: var(--color-muted-2);
  line-height: 1.65;
  flex: 1;
}

/* ── Category filter bar ─────────────────────────────────────────── */
.cat-filter-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin-bottom: 1.5rem;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
[data-theme="light"] .cat-filter-bar {
  background: var(--color-surface-2);
}

.cat-filter-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.cat-sort-group {
  margin-left: auto;
}

.cat-filter-lbl {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-muted);
  white-space: nowrap;
}
.cat-fb {
  padding: 0.28em 0.8em;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: none;
  color: var(--color-muted-2);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    border-color 0.15s,
    color 0.15s,
    background 0.15s;
  font-family: inherit;
  min-height: 30px;
}
.cat-fb:hover,
.cat-fb.active {
  border-color: var(--cat-accent, var(--color-primary));
  color: var(--cat-accent, var(--color-primary));
  background: color-mix(in srgb, var(--cat-accent, #60a5fa) 10%, transparent);
}
.cat-sort-sel {
  padding: 0.28em 0.6em;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted-2);
  font-size: 0.78rem;
  font-family: inherit;
  cursor: pointer;
  min-height: 30px;
  transition: border-color 0.15s;
}
.cat-sort-sel:focus {
  border-color: var(--cat-accent, var(--color-primary));
  outline: none;
}

/* ─── Simulation card difficulty indicator ────────────────── */
.sim-diff {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 0.75rem;
}
.sim-diff.diff-1 {
  color: #34d399;
} /* Easy — green */
.sim-diff.diff-2 {
  color: #fbbf24;
} /* Moderate — amber */
.sim-diff.diff-3 {
  color: #f87171;
} /* Advanced — red */

.sim-status-badge {
  display: inline-block;
  padding: 1px 7px;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.3);
  vertical-align: middle;
}
[data-theme="light"] .cat-sort-sel {
  background: var(--color-bg);
}

/* ── Search Overlay (Ctrl+K) ────────────────────────────────────── */
#search-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(3.5rem, 12vh, 7rem) 1rem 0;
}
#search-overlay[hidden] {
  display: none;
}

.search-ov-bg {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.search-ov-box {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 640px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  animation: searchOvIn 0.18s ease both;
}
@keyframes searchOvIn {
  from {
    opacity: 0;
    transform: translateY(-14px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
[data-theme="light"] .search-ov-box {
  background: var(--color-bg);
}

.search-ov-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border);
}
.search-ov-icon {
  color: var(--color-muted);
  flex-shrink: 0;
}
.search-ov-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--color-text);
  font-family: var(--font-main);
  font-size: 1rem;
  caret-color: var(--color-primary);
  min-width: 0;
}
.search-ov-input::placeholder {
  color: var(--color-muted);
}
.search-ov-close {
  background: none;
  border: none;
  color: var(--color-muted);
  cursor: pointer;
  font-size: 0.9rem;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-md);
  transition:
    background 0.15s,
    color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  flex-shrink: 0;
}
.search-ov-close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
}
[data-theme="light"] .search-ov-close:hover {
  background: rgba(0, 0, 0, 0.07);
}

.search-ov-results {
  max-height: min(420px, 60vh);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.search-ov-results::-webkit-scrollbar {
  width: 4px;
}
.search-ov-results::-webkit-scrollbar-track {
  background: transparent;
}
.search-ov-results::-webkit-scrollbar-thumb {
  background: var(--color-border-hover);
  border-radius: 4px;
}

.search-ov-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  color: var(--color-text);
  text-decoration: none;
  transition: background 0.12s;
  cursor: pointer;
  border-top: 1px solid var(--color-border);
}
.search-ov-item:first-child {
  border-top: none;
}
.search-ov-item:hover,
.search-ov-item[aria-selected="true"] {
  background: rgba(96, 165, 250, 0.08);
}
[data-theme="light"] .search-ov-item:hover,
[data-theme="light"] .search-ov-item[aria-selected="true"] {
  background: rgba(37, 99, 235, 0.06);
}

.search-ov-emoji {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
  width: 2rem;
  text-align: center;
}
.search-ov-body {
  flex: 1;
  min-width: 0;
}
.search-ov-title {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.search-ov-title mark {
  background: rgba(96, 165, 250, 0.22);
  color: var(--color-primary);
  border-radius: 2px;
  padding: 0 1px;
  font-style: normal;
}
.search-ov-meta {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-top: 0.1rem;
  text-transform: capitalize;
}
.search-ov-badge {
  flex-shrink: 0;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15em 0.5em;
  border-radius: var(--radius-full);
}
.search-ov-badge-sim {
  background: rgba(96, 165, 250, 0.15);
  color: var(--color-primary);
}
.search-ov-badge-art {
  background: rgba(52, 211, 153, 0.15);
  color: #34d399;
}
.search-ov-badge-cat {
  background: rgba(167, 139, 250, 0.15);
  color: var(--color-accent);
}

.search-ov-state {
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--color-muted-2);
  font-size: 0.875rem;
}
.search-ov-hint {
  text-align: left;
  padding: 0.6rem 1rem 0.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-border);
}

.search-ov-footer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.55rem 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.72rem;
  color: var(--color-muted);
  flex-wrap: wrap;
  background: rgba(255, 255, 255, 0.02);
}
[data-theme="light"] .search-ov-footer {
  background: rgba(0, 0, 0, 0.02);
}
.search-ov-footer kbd {
  display: inline-block;
  padding: 0.1em 0.35em;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  font-family: var(--font-mono, monospace);
  font-size: 0.85em;
}
[data-theme="light"] .search-ov-footer kbd {
  background: rgba(0, 0, 0, 0.06);
}
.search-ov-all {
  margin-left: auto;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.15s;
}
.search-ov-all:hover {
  opacity: 0.75;
}

@media (max-width: 680px) {
  #search-overlay {
    padding-top: 0;
    align-items: flex-end;
  }
  .search-ov-box {
    max-height: 85vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  }
  @keyframes searchOvIn {
    from {
      opacity: 0;
      transform: translateY(18px);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }
}
/* ─── Simulation loading progress bar ───────────────────────── */
#sim-load-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, #7c3aed, #60a5fa, #34d399);
  background-size: 200% 100%;
  animation:
    sim-load-slide 1.4s ease-in-out infinite,
    sim-load-fill 2.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  z-index: 9999;
  pointer-events: none;
}
#sim-load-bar.sim-load-bar--done {
  width: 100% !important;
  animation: none;
  background: #34d399;
  transition: opacity 0.4s;
  opacity: 0;
}
@keyframes sim-load-fill {
  0% {
    width: 0%;
  }
  40% {
    width: 60%;
  }
  70% {
    width: 80%;
  }
  90% {
    width: 92%;
  }
  100% {
    width: 92%;
  } /* stays here until _hideLoadBar() fires */
}
@keyframes sim-load-slide {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  #sim-load-bar {
    animation: none;
    width: 50%;
    background: #60a5fa;
  }
}

/* ─── Simulation HUD: fullscreen button + FPS counter ──────────── */
.sim-hud-btn {
  position: absolute;
  top: 60px; /* sits below the existing .back-btn (top 16px + ~36px height + 8px gap) */
  right: 16px;
  width: 36px;
  height: 36px;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: #e0e0e0;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    border-color 0.2s,
    color 0.2s;
  padding: 0;
}
.sim-hud-btn:hover {
  border-color: rgba(96, 165, 250, 0.6);
  color: #60a5fa;
}

/* Stack HUD buttons vertically (36px height + 8px gap each) */
#sim-fs-btn {
  top: 60px;
}
#sim-pause-btn {
  top: 104px;
}
#sim-info-btn {
  top: 148px;
}
#sim-share-btn {
  top: 192px;
}
#sim-shot-btn {
  top: 236px;
}
#sim-embed-btn {
  top: 280px;
}

.sim-hud-fps {
  position: absolute;
  bottom: 52px; /* above the .controls-hint (bottom 16px + ~28px height + 8px gap) */
  right: 16px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.72rem;
  font-family: ui-monospace, "Cascadia Code", "Fira Code", monospace;
  color: #9ca3af;
  pointer-events: none;
  z-index: 10;
  min-width: 52px;
  text-align: center;
}

.rel-art-arrow {
  font-size: 1rem;
  color: var(--cat-accent, var(--color-primary));
  margin-top: 0.5rem;
  transition: transform 0.15s;
  display: block;
}
.rel-art-card:not(.soon):hover .rel-art-arrow {
  transform: translateX(4px);
}
.rel-arts-more {
  text-align: center;
}
.rel-arts-more a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.75rem;
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-lg, 12px);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-muted-2);
  text-decoration: none;
  transition:
    color 0.15s,
    border-color 0.15s;
}
.rel-arts-more a:hover {
  color: var(--cat-accent, var(--color-primary));
  border-color: var(--cat-accent, var(--color-primary));
}

/* ─── Related Articles block (injected on article pages) ──────── */
.art-related {
  margin: 2.5rem 0 0.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border, rgba(255, 255, 255, 0.08));
}
.art-related-head {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-muted-2, #6b7280);
  margin: 0 0 1rem;
}
.art-related-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.art-related-card {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.8rem 1rem;
  background: var(--color-surface-2, rgba(255, 255, 255, 0.03));
  border: 1px solid var(--color-border, rgba(255, 255, 255, 0.07));
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition:
    background 0.15s,
    border-color 0.15s;
}
.art-related-card:hover {
  background: var(--color-surface-3, rgba(255, 255, 255, 0.06));
  border-color: var(--color-border-hover, rgba(255, 255, 255, 0.15));
}
.art-related-emoji {
  font-size: 1.4rem;
  flex-shrink: 0;
  line-height: 1.25;
}
.art-related-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.art-related-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text, #f1f5f9);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.art-related-desc {
  font-size: 0.78rem;
  color: var(--color-muted-2, #6b7280);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.art-related-meta {
  font-size: 0.72rem;
  color: var(--color-muted-2, #9ca3af);
  margin-top: 2px;
}
[data-theme="light"] .art-related {
  border-top-color: rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .art-related-card {
  background: rgba(0, 0, 0, 0.02);
  border-color: rgba(0, 0, 0, 0.07);
}
[data-theme="light"] .art-related-card:hover {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.14);
}

/* ─── Sim card hover "Open" overlay ──────────────────────────── */
.sim-card {
  position: relative;
  overflow: hidden;
}
.sim-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--cat-accent, var(--color-primary, #6366f1));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s var(--ease-base, cubic-bezier(0.4, 0, 0.2, 1));
  z-index: 2;
  border-radius: var(--radius-xl, 16px) var(--radius-xl, 16px) 0 0;
}
.sim-card:hover::before,
.sim-card:focus-within::before {
  transform: scaleX(1);
}
.sim-card-hover-ovl {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.22s ease;
  z-index: 3;
  border-radius: inherit;
  pointer-events: none;
}
.sim-card:hover .sim-card-hover-ovl,
.sim-card:focus-within .sim-card-hover-ovl {
  opacity: 1;
}

.sim-card-hover-btn {
  background: var(--cat-accent, #60a5fa);
  color: #000;
  border-radius: var(--radius-full, 999px);
  padding: 0.45rem 1.4rem;
  font-size: 0.875rem;
  font-weight: 700;
  font-family: inherit;
  letter-spacing: 0.01em;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
  pointer-events: none;
  user-select: none;
}

/* ─── First-visit welcome / controls hint overlay ─────────────── */
#sim-welcome-hint {
  position: fixed;
  inset: 0;
  z-index: 9100;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  animation: wcHintIn 0.38s cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes wcHintIn {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
#sim-welcome-hint.wc-out {
  animation: wcHintOut 0.3s ease forwards;
}
@keyframes wcHintOut {
  to {
    opacity: 0;
    transform: scale(0.94) translateY(8px);
  }
}
.wc-hint-box {
  background: rgba(5, 9, 20, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  padding: 1.75rem 2.4rem 1.5rem;
  text-align: center;
  max-width: 360px;
  pointer-events: auto;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
}
.wc-hint-icon {
  font-size: 2.4rem;
  margin-bottom: 0.6rem;
  display: block;
}
.wc-hint-title {
  color: #f1f5f9;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
}
.wc-hint-body {
  color: #94a3b8;
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 1.1rem;
}
.wc-hint-ok {
  background: var(--color-primary, #60a5fa);
  color: #020c1b;
  border: none;
  border-radius: 999px;
  padding: 0.45rem 1.6rem;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: opacity 0.15s;
}
.wc-hint-ok:hover {
  opacity: 0.85;
}

/* ─── HUD Button Tooltips ────────────────────────────────────── */
.sim-hud-btn[aria-label]::after {
  content: attr(aria-label);
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  background: rgba(5, 9, 20, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.72rem;
  color: #d1d5db;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s;
  z-index: 20;
}
.sim-hud-btn[aria-label]:hover::after {
  opacity: 1;
}

/* ─── Sim Info Modal ─────────────────────────────────────────── */
#sim-info-modal {
  position: fixed;
  inset: 0;
  z-index: 9200;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s;
}
#sim-info-modal.open {
  opacity: 1;
  pointer-events: auto;
}
.sim-modal-box {
  background: rgba(5, 9, 20, 0.96);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  padding: 2rem 2.4rem 1.75rem;
  max-width: 480px;
  width: calc(100% - 2rem);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.6);
  position: relative;
  max-height: 80vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}
.sim-modal-close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: none;
  border: none;
  color: #6b7280;
  font-size: 1.2rem;
  cursor: pointer;
  line-height: 1;
  padding: 6px;
  transition: color 0.15s;
  font-family: inherit;
  border-radius: 6px;
}
.sim-modal-close:hover {
  color: #f1f5f9;
  background: rgba(255, 255, 255, 0.06);
}
.sim-modal-emoji {
  font-size: 2.8rem;
  display: block;
  margin-bottom: 0.5rem;
}
.sim-modal-title {
  color: #f1f5f9;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}
.sim-modal-desc {
  color: #94a3b8;
  font-size: 0.875rem;
  line-height: 1.75;
  margin-bottom: 1.1rem;
}
.sim-modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 1.1rem;
}
.sim-modal-tag {
  background: rgba(96, 165, 250, 0.12);
  border: 1px solid rgba(96, 165, 250, 0.25);
  color: #60a5fa;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 500;
  text-decoration: none;
  transition:
    background 0.15s,
    border-color 0.15s;
}
.sim-modal-tag:hover,
.sim-modal-tag:focus-visible {
  background: rgba(96, 165, 250, 0.22);
  border-color: rgba(96, 165, 250, 0.55);
  text-decoration: none;
  outline: 2px solid rgba(96, 165, 250, 0.5);
  outline-offset: 1px;
}
.sim-modal-ctrl-head {
  color: #6b7280;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}
.sim-modal-controls {
  color: #d1d5db;
  font-size: 0.82rem;
  line-height: 1.7;
  margin-bottom: 1.1rem;
}
.sim-modal-article {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1.4rem;
  background: rgba(96, 165, 250, 0.12);
  border: 1px solid rgba(96, 165, 250, 0.3);
  border-radius: 999px;
  color: #60a5fa;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  transition:
    background 0.15s,
    border-color 0.15s;
}
.sim-modal-article:hover {
  background: rgba(96, 165, 250, 0.22);
  border-color: rgba(96, 165, 250, 0.5);
}

/* Related simulations block inside info modal */
.sim-modal-rel-head {
  color: #6b7280;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 1.4rem;
  margin-bottom: 0.6rem;
}
.sim-modal-related {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sim-modal-rel-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.9rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  transition:
    background 0.15s,
    border-color 0.15s;
}
.sim-modal-rel-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
  color: #f1f5f9;
}
.sim-modal-rel-emoji {
  font-size: 1.1rem;
  flex-shrink: 0;
}
.sim-modal-rel-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ─── Embed snippet modal ────────────────────────────────────── */
#sim-embed-modal {
  position: fixed;
  inset: 0;
  z-index: 9300;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s;
}
#sim-embed-modal.open {
  opacity: 1;
  pointer-events: auto;
}
.sim-embed-box {
  background: rgba(5, 9, 20, 0.96);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  padding: 2rem 2.4rem 1.75rem;
  max-width: 540px;
  width: calc(100% - 2rem);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.6);
  position: relative;
}
.sim-embed-close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: none;
  border: none;
  color: #6b7280;
  font-size: 1.2rem;
  cursor: pointer;
  line-height: 1;
  padding: 6px;
  transition: color 0.15s;
  font-family: inherit;
  border-radius: 6px;
}
.sim-embed-close:hover {
  color: #f1f5f9;
  background: rgba(255, 255, 255, 0.06);
}
.sim-embed-title {
  color: #f1f5f9;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.sim-embed-code {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  font-size: 0.78rem;
  color: #a3e4d7;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
  margin-bottom: 0.9rem;
  font-family: "Courier New", Courier, monospace;
}
.sim-embed-copy {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.4rem;
  background: rgba(52, 211, 153, 0.14);
  border: 1px solid rgba(52, 211, 153, 0.35);
  border-radius: 999px;
  color: #34d399;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition:
    background 0.15s,
    border-color 0.15s;
}
.sim-embed-copy:hover {
  background: rgba(52, 211, 153, 0.24);
  border-color: rgba(52, 211, 153, 0.55);
}

/* ─── Status filter chips ────────────────────────────────────── */
.cat-fb-status[data-status="wip"] {
  border-color: rgba(251, 191, 36, 0.35);
  color: #fbbf24;
}
.cat-fb-status[data-status="wip"].active {
  background: rgba(251, 191, 36, 0.18);
  border-color: rgba(251, 191, 36, 0.55);
  color: #fbbf24;
}
.cat-fb-status[data-status="planned"] {
  border-color: rgba(156, 163, 175, 0.35);
  color: #9ca3af;
}
.cat-fb-status[data-status="planned"].active {
  background: rgba(156, 163, 175, 0.18);
  border-color: rgba(156, 163, 175, 0.55);
  color: #9ca3af;
}

/* ─── Tech chip filters ──────────────────────────────────────── */
.cat-tech-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 2px;
  width: 100%;
}
.cat-tech-lbl {
  font-size: 0.72rem;
  color: #6b7280;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: 2px;
  white-space: nowrap;
}
.cat-tech-chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  color: #9ca3af;
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  transition:
    background 0.15s,
    border-color 0.15s,
    color 0.15s;
  white-space: nowrap;
}
.cat-tech-chip:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #d1d5db;
}
.cat-tech-chip.active {
  background: rgba(96, 165, 250, 0.15);
  border-color: rgba(96, 165, 250, 0.45);
  color: #60a5fa;
}

/* ── Skeleton loader (shimmer animation) ──────────────────────────── */
@keyframes skeleton-shimmer {
  from {
    background-position: -400px 0;
  }
  to {
    background-position: 400px 0;
  }
}
.skeleton,
.skeleton-text,
.skeleton-thumb,
.skeleton-circle {
  background: linear-gradient(
    90deg,
    var(--color-surface-2, rgba(255, 255, 255, 0.04)) 25%,
    var(--color-border, rgba(255, 255, 255, 0.1)) 50%,
    var(--color-surface-2, rgba(255, 255, 255, 0.04)) 75%
  );
  background-size: 800px 100%;
  animation: skeleton-shimmer 1.5s linear infinite;
  border-radius: var(--radius-sm, 6px);
  pointer-events: none;
}
[data-theme="light"] .skeleton,
[data-theme="light"] .skeleton-text,
[data-theme="light"] .skeleton-thumb,
[data-theme="light"] .skeleton-circle {
  background: linear-gradient(90deg, #e4e8ef 25%, #f4f6fb 50%, #e4e8ef 75%);
  background-size: 800px 100%;
}
.skeleton-text {
  display: block;
  height: 0.85em;
}
.skeleton-text.wide {
  width: 90%;
}
.skeleton-text.medium {
  width: 65%;
}
.skeleton-text.short {
  width: 40%;
}
.skeleton-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-md, 10px);
}
.skeleton-circle {
  border-radius: 50%;
}

/* Sim-card thumbnail placeholder — revealed when thumbnails are available */
.sim-card .sim-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: var(--radius-md, 10px) var(--radius-md, 10px) 0 0;
  background: var(--color-surface-2, rgba(255, 255, 255, 0.04));
}
.sim-card .sim-thumb.loading {
  background: linear-gradient(
    90deg,
    var(--color-surface-2, rgba(255, 255, 255, 0.04)) 25%,
    rgba(255, 255, 255, 0.08) 50%,
    var(--color-surface-2, rgba(255, 255, 255, 0.04)) 75%
  );
  background-size: 800px 100%;
  animation: skeleton-shimmer 1.5s linear infinite;
}
/* Emoji thumbnail placeholder — injected by injectSimThumbs() in components.js */
.sim-card-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(
    135deg,
    var(--color-surface-2, rgba(255, 255, 255, 0.03)) 0%,
    var(--cat-glow, rgba(96, 165, 250, 0.18)) 100%
  );
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 3.5rem;
  line-height: 1;
  user-select: none;
  pointer-events: none;
  flex-shrink: 0;
  overflow: hidden;
  transition: transform 0.28s var(--ease-base, cubic-bezier(0.4, 0, 0.2, 1));
}
.sim-card:hover .sim-card-thumb {
  transform: scale(1.06);
}
[data-theme="light"] .sim-card-thumb {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.5) 0%,
    var(--cat-glow, rgba(96, 165, 250, 0.12)) 100%
  );
  border-bottom-color: rgba(0, 0, 0, 0.06);
}

/* Skeleton card placeholder (used before real cards arrive) */
.sim-card-skeleton {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--color-surface-2, rgba(255, 255, 255, 0.04));
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 0;
}
.sim-card-skeleton .skeleton-thumb {
  border-radius: 0;
  margin: 0;
}
.sim-card-skeleton .skeleton-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

/* ── Web Speech "Listen" button for kids category pages ──────────── */
.speak-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.25rem;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full, 999px);
  border: 1.5px solid rgba(99, 102, 241, 0.35);
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-accent, #818cf8);
  font-size: var(--text-sm, 0.875rem);
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition:
    background 0.18s,
    border-color 0.18s,
    color 0.18s;
  min-height: 44px;
  min-width: 44px;
}
.speak-btn:hover {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--color-accent, #818cf8);
}
.speak-btn:focus-visible {
  outline: 2px solid var(--color-accent, #818cf8);
  outline-offset: 2px;
}

/* ── Embed mode — hide navbar / footer chrome ──────────────────── */
body.embed-mode {
  padding-top: 0 !important;
}
body.embed-mode #navbar-root,
body.embed-mode .navbar,
body.embed-mode #footer-root,
body.embed-mode .site-footer {
  display: none !important;
}
body.embed-mode .sim-page {
  position: fixed;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
}

/* ── Navbar on sim pages: transparent overlay, no body padding ── */
body.sim-page .navbar {
  background: rgba(8, 9, 14, 0.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
body.sim-page .sim-header {
  padding-top: var(--navbar-h, 64px);
}