/* Archive-level navigation shared by imported study experiences. */
.sir-study-return--deck-nav {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  min-height: 2rem;
  padding: .27rem .65rem;
  border: 1px solid var(--border, rgba(255, 255, 255, .15));
  border-radius: 10px;
  background: rgba(7, 11, 18, .8);
  color: var(--fg-muted, #b8bec8) !important;
  font: 600 .76rem/1 var(--font-sans, var(--sans, system-ui, sans-serif));
  text-decoration: none !important;
  transition: border-color .18s ease, color .18s ease, transform .18s ease;
}

.sir-study-return--deck-nav:hover {
  border-color: var(--accent-3, var(--a3, #f4338d));
  color: #fff !important;
  transform: translateY(-1px);
}

.sir-study-return--deck-nav:focus-visible,
.sir-gate-return:focus-visible,
.sir-mobile-study-nav a:focus-visible,
.sir-utility-nav a:focus-visible,
.sir-404-return:focus-visible {
  outline: 3px solid var(--accent-4, var(--a4, #f2c85b)) !important;
  outline-offset: 4px !important;
}

body.locked .sir-mobile-study-nav {
  display: none !important;
}

.sir-study-return--inline,
.sir-gate-return {
  display: inline-flex !important;
  align-items: center;
  gap: .4rem;
  text-decoration: none;
}

.sir-gate-return {
  min-height: 44px;
  color: var(--accent-4, var(--a4, #f2c85b));
  font: 600 .76rem/1.25 var(--font-sans, system-ui, sans-serif);
}

.sir-gate-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .25rem 1.1rem;
  margin: 0 0 .7rem;
}

.sir-mobile-study-nav {
  display: none;
}

.sir-utility-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem 1.15rem;
  margin: 0 0 1.35rem;
  font: 650 .82rem/1.35 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.sir-utility-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: inherit;
  text-underline-offset: .22em;
}

@media (max-width: 820px) {
  .sir-study-return--inline {
    min-height: 44px;
  }
}

@media (max-width: 700px) {
  .sir-mobile-study-nav {
    position: sticky;
    top: 0;
    z-index: 60;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .7rem;
    min-height: 52px;
    padding: .35rem 1.2rem;
    border-bottom: 1px solid var(--border, rgba(255, 255, 255, .15));
    background: rgba(7, 11, 18, .94);
    color: var(--fg, #f4f7fb);
    font: 600 .78rem/1.25 var(--sans, system-ui, sans-serif);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }

  .sir-mobile-study-nav a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    color: inherit;
    text-decoration: none;
    text-align: center;
  }

  .sir-mobile-study-nav a:first-child {
    text-align: left;
  }

  .sir-mobile-study-nav a:last-child {
    color: var(--a4, #5fe3ff);
    text-align: right;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sir-study-return--deck-nav {
    transition: none;
  }
}

@media print {
  .sir-study-return,
  .sir-gate-return,
  .sir-gate-links,
  .sir-mobile-study-nav,
  .sir-utility-nav,
  .sir-404-return {
    display: none !important;
  }
}