.dzkrium-scroll-progress {
  position: fixed;
  z-index: 1200;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  pointer-events: none;
  background: transparent;
}
.dzkrium-scroll-progress > i {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: color-mix(in srgb, var(--brown) 76%, var(--ivory));
  will-change: transform;
}

.dzkrium-back-top {
  position: fixed;
  z-index: 920;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, calc(env(safe-area-inset-bottom) + 18px));
  min-width: 66px;
  min-height: 46px;
  padding: 0 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  color: var(--muted);
  box-shadow: 0 10px 30px rgba(0,0,0,.14);
  backdrop-filter: blur(12px);
  opacity: 0;
  visibility: hidden;
  translate: 0 8px;
  transition: opacity .18s ease, visibility .18s ease, translate .18s ease, border-color .18s ease, color .18s ease, background .18s ease;
  cursor: pointer;
  font: 800 10px/1 var(--font-mono);
  letter-spacing: .08em;
}
.dzkrium-back-top b { color: var(--brown); font-size: 15px; line-height: 1; }
.dzkrium-back-top.is-visible { opacity: .78; visibility: visible; translate: 0 0; }
.dzkrium-back-top.is-visible:hover,
.dzkrium-back-top.is-near-bottom { opacity: 1; color: var(--text); border-color: color-mix(in srgb, var(--brown) 55%, var(--line)); }
.dzkrium-back-top:active { translate: 0 1px; }

.v18-nav a.is-current,
.v18-mobile a.is-current { color: var(--text); }
.v18-nav a.is-current::after { right: 0; }

:is(a, button):not([aria-disabled="true"]) {
  transition-property: color, border-color, background-color, opacity, transform;
  transition-duration: .16s;
  transition-timing-function: ease;
}
:is(.v18-control, .v18-menu, .control-button, .menu-button, .button, .v18-project__actions a, .v18-social a):active {
  transform: translateY(1px) scale(.99);
}

html.dzkrium-theme-changing *,
html.dzkrium-theme-changing *::before,
html.dzkrium-theme-changing *::after {
  transition: background-color .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease !important;
}

@media (max-width: 600px) {
  .dzkrium-back-top { right: 14px; min-width: 56px; min-height: 44px; padding-inline: 10px; }
  .dzkrium-back-top span { font-size: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  .dzkrium-back-top,
  :is(a, button) { transition: none !important; }
}

/* Theme reveal: progressive enhancement via View Transitions API */
html.dzkrium-theme-transition::view-transition-old(root),
html.dzkrium-theme-transition::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
}
html.dzkrium-theme-transition::view-transition-new(root) { z-index: 99999; }
html.dzkrium-theme-transition::view-transition-old(root) { z-index: 99998; }

@media (prefers-reduced-motion: reduce) {
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) { animation-duration: 0s !important; }
}