/* ─── AMBIENT BACKGROUND CANVAS ─── */
#ambient-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 1;
}

/* ─── SIDE RAILS ─── */
.side-rail {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 140px;
  pointer-events: none;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  overflow: hidden;
  /* Only show on very wide screens where there's actual space */
}

.side-rail--left {
  left: 0;
}

.side-rail--right {
  right: 0;
}

/* Scanning line that sweeps top→bottom */
.rail-scan-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 160px;
  background: linear-gradient(to bottom,
      transparent 0%,
      rgba(167, 139, 250, 0.015) 40%,
      rgba(167, 139, 250, 0.032) 50%,
      rgba(167, 139, 250, 0.015) 60%,
      transparent 100%);
  animation: rail-scan 18s linear infinite;
  pointer-events: none;
}

.side-rail--right .rail-scan-line {
  animation-delay: -9s;
  /* offset by half so they're never in sync */
  background: linear-gradient(to bottom,
      transparent 0%,
      rgba(45, 212, 191, 0.01) 40%,
      rgba(45, 212, 191, 0.022) 50%,
      rgba(45, 212, 191, 0.01) 60%,
      transparent 100%);
}

@keyframes rail-scan {
  0% {
    transform: translateY(-100vh);
  }

  100% {
    transform: translateY(100vh);
  }
}

/* Vertical stamp text */
.rail-stamp {
  font-family: 'IBM Plex Mono', 'SF Mono', 'Fira Code', monospace;
  font-size: 8.5px;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--text-tertiary);
  opacity: 0.35;
  writing-mode: vertical-lr;
  text-orientation: mixed;
  white-space: nowrap;
  user-select: none;
  padding: 16px 0;
  border-left: 1px solid rgba(255, 255, 255, 0.04);
  border-right: 1px solid rgba(255, 255, 255, 0.04);
}

.side-rail--right .rail-stamp {
  transform: rotate(180deg);
}

.rail-stamp--bottom {
  margin-top: auto;
  opacity: 0.22;
}

/* Live data section in the middle of rails */
.rail-data {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 0;
  flex: 1;
  justify-content: center;
}

.rail-data-item {
  font-family: 'IBM Plex Mono', 'SF Mono', 'Fira Code', monospace;
  font-size: 8px;
  font-weight: 400;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.45;
  writing-mode: vertical-lr;
  white-space: nowrap;
  user-select: none;
}

.side-rail--right .rail-data-item {
  transform: rotate(180deg);
}

.rail-data-item--dim {
  color: var(--text-tertiary);
  opacity: 0.25;
}

.rail-data-item--blink {
  color: var(--cat-security);
  animation: rail-blink 2.8s step-end infinite;
}

@keyframes rail-blink {

  0%,
  80%,
  100% {
    opacity: 0.5;
  }

  90% {
    opacity: 0.1;
  }
}

/* Thin inner edge lines on the rails */
.side-rail--left::after,
.side-rail--right::after {
  content: '';
  position: absolute;
  top: 10%;
  bottom: 10%;
  width: 1px;
  background: linear-gradient(to bottom,
      transparent,
      rgba(167, 139, 250, 0.12) 20%,
      rgba(167, 139, 250, 0.12) 80%,
      transparent);
}

.side-rail--left::after {
  right: 0;
}

.side-rail--right::after {
  left: 0;
}

/* Only show rails when viewport is wide enough for them not to overlap content */
@media (max-width: 1400px) {
  .side-rail {
    display: none;
  }
}

/* ─── PREFERS-REDUCED-MOTION ─── */
@media (prefers-reduced-motion: reduce) {

  /* Disable all keyframe animations */
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  /* Keep scroll reveal visible: don't leave content hidden */
  .reveal {
    opacity: 1;
    transform: none;
  }

  /* Hide cursor trail canvas entirely */
  #cursor-trail {
    display: none;
  }

  /* Hide ambient background canvas */
  #ambient-bg {
    display: none;
  }

  /* Freeze rail scan lines */
  .rail-scan-line {
    animation: none;
  }

  /* Freeze threat-map blink dot */
  .threat-blink {
    animation: none;
    opacity: 1;
  }

}