@media (min-width: 1px) {
  [data-token="::before"] {
    width: 160px;
    height: 80px;
    background: linear-gradient(90deg, #d9d9d9 1px, transparent 1px), linear-gradient(180deg, #d9d9d9 1px, transparent 1px);
    background-size: 72px 72px;
  }
}

body {
  background: #111;
  color: #fff;
}

/* Literal pseudo-element text inside an attribute value is data, not selector
   syntax. This rule has no live match even though an empty-value decoy does. */
[data-decoy="::before"] {
  color: #7c3aed;
}

/* Escaped colons are identifier data, not a legacy pseudo-element. */
.\:\:before {
  width: 240px;
  height: 160px;
  clip-path: polygon(2% 4%, 17% 1%, 31% 7%, 47% 3%, 62% 9%, 79% 2%, 96% 13%, 91% 31%, 98% 49%, 89% 68%, 95% 87%, 74% 96%, 51% 91%, 29% 98%, 8% 84%, 3% 61%);
}

/* A valid hostless pseudo-element selector cannot be queried through the DOM
   selector API. It must remain in the corpus rather than count as unused. */
main > ::before {
  content: "Rendered pseudo-element text";
  display: block;
  width: 160px;
  animation: bounce-linked-pseudo 1s ease-in-out infinite;
}

@keyframes bounce-linked-pseudo {
  50% { transform: translateY(2px); }
}

.linked-marquee {
  animation: linked-horizontal-loop 8s linear infinite;
}

@keyframes linked-horizontal-loop {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.linked-keyframe-overshoot {
  animation: linked-keyframe-curve 2s linear infinite;
}

@keyframes linked-keyframe-curve {
  from {
    transform: translateY(0);
    animation-timing-function: cubic-bezier(0.34, 1.56, 0.64, 1);
  }
  to { transform: translateY(2px); }
}

.overridden-keyframes-animation {
  animation: overridden-horizontal-loop 2s linear infinite;
}

@keyframes overridden-horizontal-loop {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* The later same-name definition is the one Chromium renders. */
@keyframes overridden-horizontal-loop {
  50% { opacity: 0.4; }
}

@layer linked-keyframes-low, linked-keyframes-high;

.layered-keyframes-animation {
  animation: layered-horizontal-loop 2s linear infinite;
}

@layer linked-keyframes-high {
  @keyframes layered-horizontal-loop {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
  }
}

/* Lower layer appears later in source, but does not override the high layer. */
@layer linked-keyframes-low {
  @keyframes layered-horizontal-loop {
    50% { opacity: 0.4; }
  }
}

.linked-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  animation: linked-signal-cycle 1.5s ease-in-out infinite;
}

@keyframes linked-signal-cycle {
  50% { opacity: 0.35; }
}

/* Chromium makes nested keyframes globally available even while the enclosing
   container condition is false, so this live reference must still scan. */
.inactive-container-animation-reference {
  animation: inactive-container-horizontal-loop 8s linear infinite;
}

@container (width > 2000px) {
  @keyframes inactive-container-horizontal-loop {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
  }
}

.active-container-animation-reference {
  animation: active-container-horizontal-loop 8s linear infinite;
}

/* The declaration is intentionally outside the container group. */
@container (width > 900px) {
  @keyframes active-container-horizontal-loop {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
  }
}

/* A pseudo-element whose originating element is absent must remain outside
   live URL findings instead of being retained as an unresolvable selector. */
.absent > ::before {
  background: repeating-linear-gradient(45deg, #eee, #eee 10px, #fafafa 10px, #fafafa 20px);
}

/* These selectors exist in the live DOM, but their conditions are inactive.
   URL scans must not treat their declarations as rendered page styles. */
@media (max-width: 1px) {
  .inactive-media-stripes {
    background: repeating-linear-gradient(45deg, #eee, #eee 10px, #fafafa 10px, #fafafa 20px);
  }
}

@supports (display: imaginary-layout) {
  .inactive-supports-stripes {
    background: repeating-linear-gradient(45deg, #eee, #eee 10px, #fafafa 10px, #fafafa 20px);
  }
}

/* The host exists, but the complete pseudo-class selector is inactive. */
.inactive-pseudo-stripes:not(.active) {
  background: repeating-linear-gradient(45deg, #eee, #eee 10px, #fafafa 10px, #fafafa 20px);
}

.container-query-host {
  container-type: inline-size;
  width: 240px;
}

.container-query-host-active {
  width: 960px;
}

@container (width > 900px) {
  .inactive-container-stripes {
    background: repeating-linear-gradient(45deg, #eee, #eee 10px, #fafafa 10px, #fafafa 20px);
  }

  .active-container-halo {
    width: 640px;
    height: 400px;
    background: radial-gradient(circle, rgba(80, 111, 255, 0.85), transparent 70%);
  }
}

/* Non-selector at-rules in an inactive container must not enter page-level
   pattern scans just because their CSSOM text is readable. */
@container (width > 2000px) {
  @keyframes inactive-container-gradient-text {
    from {
      background: linear-gradient(90deg, #111, #999);
      background-clip: text;
    }
    to { background: none; }
  }
}

.unused-linked-transition {
  transition: width 200ms ease;
}