/* ==========================================================================
   Ultra-Smooth Section Navigation Rail (Jesko Jets & Apple Inspired)
   ========================================================================== */

.side-index,
.about-index {
  position: fixed !important;
  left: clamp(20px, 2.6vw, 42px) !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  z-index: 80 !important;
  display: flex !important;
  flex-direction: column !important;
  gap: clamp(28px, 4.8vh, 48px) !important;
  padding: 0 !important;
  margin: 0 !important;
  width: auto !important;
  max-width: 90px !important;
  list-style: none !important;
  user-select: none !important;
  pointer-events: auto !important;
  transition: opacity 0.3s ease !important;
  will-change: auto !important;
}

/* Continuous Vertical Rail Track Line */
.side-index .rail-track,
.about-index .rail-track {
  position: absolute !important;
  left: 6px !important;
  width: 1.5px !important;
  background: rgba(0, 0, 0, 0.08) !important;
  border-radius: 2px !important;
  z-index: 1 !important;
  pointer-events: none !important;
  overflow: hidden !important;
}

/* Dark mode / dark page support */
.dark-page .side-index .rail-track,
.dark-page .about-index .rail-track,
body.dark-mode .side-index .rail-track {
  background: rgba(255, 255, 255, 0.12) !important;
}

/* Active Track Progress Fill Line */
.side-index .rail-track-fill,
.about-index .rail-track-fill {
  position: absolute !important;
  top: 0 !important;
  left: 0 !important;
  width: 100% !important;
  height: 0% !important;
  background: var(--accent, #ff4e1b) !important;
  border-radius: 2px !important;
  transition: height 0.35s cubic-bezier(0.22, 1, 0.36, 1) !important;
}

/* Gliding Indicator Dot with Glowing Halo - Centered on Rail Track */
.side-index .rail-indicator-dot,
.about-index .rail-indicator-dot {
  position: absolute !important;
  top: 0 !important;
  left: 0.25px !important;
  width: 9px !important;
  height: 9px !important;
  border-radius: 50% !important;
  background: var(--accent, #ff4e1b) !important;
  border: 2px solid var(--paper, #faf9f6) !important;
  box-sizing: content-box !important;
  box-shadow: 0 0 10px rgba(255, 78, 27, 0.6), 0 2px 5px rgba(0, 0, 0, 0.12) !important;
  z-index: 4 !important;
  pointer-events: none !important;
  transform: translate3d(0, var(--dot-y, 0px), 0) !important;
  transition: transform 0.42s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.3s ease !important;
  will-change: transform !important;
}

/* Clear all fragmented pseudo lines and static pseudo dots */
.side-index a::before,
.side-index a::after,
.side-index .active::before,
.side-index .active::after,
.about-index a::before,
.about-index a::after,
.about-index a.active::before,
.about-index a.active::after {
  display: none !important;
  content: none !important;
}

/* Section Item Links */
.side-index a,
.about-index a {
  position: relative !important;
  z-index: 2 !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 2px !important;
  padding-left: 22px !important;
  height: auto !important;
  width: auto !important;
  min-width: 58px !important;
  text-decoration: none !important;
  color: var(--muted, #868480) !important;
  cursor: pointer !important;
  transition: color 0.3s cubic-bezier(0.22, 1, 0.36, 1), transform 0.3s cubic-bezier(0.22, 1, 0.36, 1) !important;
  will-change: transform, color !important;
}

/* Numbers (01, 02, etc.) */
.side-index a strong,
.about-index a b {
  display: block !important;
  font-family: 'DM Mono', monospace !important;
  font-size: 13px !important;
  font-weight: 700 !important;
  letter-spacing: -0.2px !important;
  line-height: 1.15 !important;
  color: #9c9893 !important;
  transition: color 0.3s cubic-bezier(0.22, 1, 0.36, 1), transform 0.3s cubic-bezier(0.22, 1, 0.36, 1) !important;
}

/* Labels (HOME, WORK, etc.) */
.side-index a span,
.about-index a span {
  display: block !important;
  font-family: 'DM Mono', monospace !important;
  font-size: 8.5px !important;
  font-weight: 600 !important;
  letter-spacing: 0.9px !important;
  line-height: 1.1 !important;
  color: #b0aca6 !important;
  text-transform: uppercase !important;
  transition: color 0.3s cubic-bezier(0.22, 1, 0.36, 1), transform 0.3s cubic-bezier(0.22, 1, 0.36, 1) !important;
}

/* Hover State */
.side-index a:hover,
.about-index a:hover {
  transform: translateX(3px) !important;
}

.side-index a:hover strong,
.about-index a:hover b {
  color: var(--ink, #121211) !important;
}

.side-index a:hover span,
.about-index a:hover span {
  color: var(--ink, #121211) !important;
}

/* Active State */
.side-index a.active,
.about-index a.active {
  transform: translateX(4px) !important;
}

.side-index a.active strong,
.about-index a.active b {
  color: var(--ink, #121211) !important;
  font-weight: 800 !important;
}

.side-index a.active span,
.about-index a.active span {
  color: var(--accent, #ff4e1b) !important;
  font-weight: 700 !important;
}

/* Responsive Rules */
@media (min-width: 1051px) {
  .side-index,
  .about-index {
    display: flex !important;
  }
}

@media (max-width: 1050px) {
  .side-index,
  .about-index {
    display: none !important;
  }
}