/* framebuffer-and-render-target.html — Framebuffer Routing Lab */

@keyframes doc-frl-step-glow {
  0%,
  100% {
    text-shadow: 0 0 12px rgba(46, 231, 242, 0.35);
    color: rgba(210, 235, 255, 0.96);
  }
  50% {
    text-shadow: 0 0 22px rgba(120, 220, 255, 0.55);
    color: rgba(235, 248, 255, 1);
  }
}

@keyframes doc-frl-viewport-draw {
  0%,
  100% {
    box-shadow:
      0 0 0 1px rgba(110, 150, 210, 0.18) inset,
      0 0 0 0 rgba(46, 231, 242, 0);
  }
  50% {
    box-shadow:
      0 0 0 1px rgba(94, 200, 255, 0.42) inset,
      0 0 28px rgba(46, 231, 242, 0.22);
  }
}

@keyframes doc-frl-fb-hot {
  0%,
  100% {
    border-color: rgba(94, 200, 255, 0.38);
    box-shadow: 0 0 18px rgba(46, 231, 242, 0.12);
  }
  50% {
    border-color: rgba(120, 220, 255, 0.55);
    box-shadow: 0 0 26px rgba(46, 231, 242, 0.22);
  }
}

@keyframes doc-frl-badge-screen {
  0%,
  100% {
    box-shadow: 0 0 12px rgba(46, 231, 242, 0.25);
    border-color: rgba(94, 230, 255, 0.45);
  }
  50% {
    box-shadow: 0 0 20px rgba(120, 235, 255, 0.45);
    border-color: rgba(160, 240, 255, 0.65);
  }
}

.doc-frl {
  margin: 1.05rem 0 0;
  border-radius: 16px;
  border: 1px solid rgba(94, 180, 255, 0.26);
  background: linear-gradient(
    168deg,
    rgba(16, 22, 42, 0.82) 0%,
    rgba(10, 14, 28, 0.72) 48%,
    rgba(18, 14, 36, 0.78) 100%
  );
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.42) inset,
    0 12px 38px rgba(0, 0, 0, 0.38);
  overflow: hidden;
}

/* Full-width cinematic stage — single focal point */
.doc-frl__stage {
  padding: 0.5rem 0.55rem 0.55rem;
  background: radial-gradient(110% 85% at 50% 8%, rgba(46, 231, 242, 0.07) 0%, transparent 52%),
    rgba(5, 8, 18, 0.52);
  border-bottom: 1px solid rgba(110, 150, 210, 0.14);
}

.doc-frl__viewport {
  position: relative;
  margin: 0 auto;
  width: 100%;
  max-width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(110, 150, 210, 0.18);
  background: rgba(5, 10, 22, 0.55);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  min-height: min(52vw, 420px);
  transition: box-shadow 0.2s ease;
}

.doc-frl__viewport.is-frl-draw-pulse {
  animation: doc-frl-viewport-draw 0.85s ease-in-out infinite;
}

.doc-frl__viewport canvas[data-frl-canvas] {
  width: 100%;
  height: 100%;
  display: block;
  cursor: default;
  touch-action: none;
  vertical-align: top;
}

.doc-frl__hud {
  position: absolute;
  right: 0.55rem;
  top: 0.55rem;
  z-index: 2;
  padding: 0.3rem 0.45rem;
  border-radius: 12px;
  border: 1px solid rgba(120, 190, 255, 0.22);
  background: linear-gradient(165deg, rgba(18, 28, 48, 0.55) 0%, rgba(10, 14, 28, 0.78) 100%);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.35) inset,
    0 8px 24px rgba(0, 0, 0, 0.35);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(210, 235, 255, 0.92);
  pointer-events: none;
  white-space: nowrap;
  max-width: calc(100% - 1.1rem);
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc-frl__hud.is-frl-present-glow {
  border-color: rgba(100, 220, 255, 0.42);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.35) inset,
    0 0 22px rgba(46, 231, 242, 0.28);
}

/* Bottom: timeline + accordion inspector */
.doc-frl__bottom {
  padding: 0.55rem 0.75rem 0.65rem;
  background: rgba(5, 8, 18, 0.22);
  border-bottom: 1px solid rgba(110, 150, 210, 0.12);
}

.doc-frl__previews-label {
  margin: 0.15rem 0 0.28rem;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: rgba(150, 185, 230, 0.62);
}

.doc-frl__previews-label span {
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: none;
  color: rgba(165, 195, 230, 0.5);
}

.doc-frl__timeline {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: center;
  gap: 0.28rem 0.45rem;
  padding: 0.4rem 0.35rem 0.5rem;
  margin: 0 0 0.25rem;
  border-bottom: 1px solid rgba(110, 150, 210, 0.12);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  color: rgba(140, 170, 215, 0.55);
  white-space: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.doc-frl__step {
  padding: 0.12rem 0.2rem;
  border-radius: 6px;
  transition: color 0.15s ease, background 0.15s ease;
}

.doc-frl__step.is-hot {
  color: rgba(210, 235, 255, 0.98);
  background: rgba(46, 231, 242, 0.08);
  animation: doc-frl-step-glow 1.1s ease-in-out infinite;
}

.doc-frl__arr {
  color: rgba(110, 150, 210, 0.32);
  user-select: none;
}

.doc-frl__inspector {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.doc-frl__acc {
  border-radius: 12px;
  border: 1px solid rgba(110, 150, 210, 0.14);
  background: rgba(8, 14, 28, 0.45);
  overflow: hidden;
}

.doc-frl__acc-sum {
  list-style: none;
  cursor: pointer;
  padding: 0.45rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(190, 208, 240, 0.92);
  background: rgba(5, 10, 22, 0.35);
  border-bottom: 1px solid rgba(110, 150, 210, 0.1);
}

.doc-frl__acc-sum::-webkit-details-marker {
  display: none;
}

.doc-frl__acc-sum::after {
  content: "";
  float: right;
  width: 0.45rem;
  height: 0.45rem;
  margin-top: 0.2rem;
  border-right: 2px solid rgba(150, 185, 230, 0.5);
  border-bottom: 2px solid rgba(150, 185, 230, 0.5);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.doc-frl__acc[open] > .doc-frl__acc-sum::after {
  transform: rotate(-135deg);
  margin-top: 0.32rem;
}

.doc-frl__acc-body {
  padding: 0.55rem 0.65rem 0.65rem;
}

.doc-frl__view {
  display: grid;
  grid-template-columns: 4.4rem 1fr;
  gap: 0.55rem;
  align-items: center;
  margin-bottom: 0.5rem;
}

.doc-frl__lbl {
  font-size: 0.78rem;
  color: rgba(190, 208, 240, 0.84);
}

.doc-frl__select {
  width: 100%;
  max-width: 22rem;
  border-radius: 10px;
  border: 1px solid rgba(110, 150, 210, 0.18);
  background: rgba(5, 10, 22, 0.72);
  color: rgba(210, 228, 255, 0.92);
  padding: 0.35rem 0.45rem;
  font-size: 0.82rem;
}

.doc-frl__stack {
  display: grid;
  gap: 0.5rem;
}

.doc-frl__fb {
  border-radius: 12px;
  border: 1px solid rgba(110, 150, 210, 0.14);
  background: rgba(5, 10, 22, 0.55);
  padding: 0.5rem 0.55rem 0.55rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.doc-frl__fb.is-hot {
  animation: doc-frl-fb-hot 1.15s ease-in-out infinite;
}

.doc-frl__fb-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.64rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: rgba(210, 228, 255, 0.92);
}

.doc-frl__fb-badge {
  padding: 0.15rem 0.32rem;
  border-radius: 999px;
  border: 1px solid rgba(94, 200, 255, 0.18);
  background: rgba(8, 14, 28, 0.55);
  font-size: 0.56rem;
  color: rgba(130, 235, 255, 0.9);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.doc-frl__fb-badge--off {
  color: rgba(210, 195, 255, 0.9);
  border-color: rgba(210, 195, 255, 0.16);
}

.doc-frl__fb-badge--screen.is-hot {
  animation: doc-frl-badge-screen 1s ease-in-out infinite;
}

.doc-frl__fb-badge--off.is-hot {
  border-color: rgba(200, 170, 255, 0.45);
  box-shadow: 0 0 14px rgba(200, 170, 255, 0.22);
}

.doc-frl__fb-list {
  margin: 0.4rem 0 0;
  padding-left: 1.05rem;
  color: rgba(190, 208, 240, 0.92);
  font-size: 0.8rem;
  line-height: 1.42;
}

.doc-frl__kv {
  display: grid;
  gap: 0.4rem;
}

.doc-frl__kv-row {
  display: grid;
  grid-template-columns: minmax(6.5rem, 7.5rem) 1fr;
  gap: 0.55rem;
  align-items: baseline;
  padding-top: 0.4rem;
  border-top: 1px solid rgba(110, 150, 210, 0.1);
}

.doc-frl__kv-row:first-child {
  border-top: 0;
  padding-top: 0;
}

.doc-frl__kv-k {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: rgba(150, 185, 230, 0.7);
  text-transform: uppercase;
}

.doc-frl__kv-v {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.7rem;
  color: rgba(210, 228, 255, 0.92);
  white-space: pre-wrap;
}

/* Thumbnail strip — ~35% shorter than previous */
.doc-frl__previews {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.45rem;
  margin: 0 0 0.55rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(110, 150, 210, 0.1);
}

.doc-frl__mini {
  border-radius: 10px;
  border: 1px solid rgba(94, 200, 255, 0.12);
  background: rgba(8, 14, 28, 0.45);
  padding: 0.32rem 0.38rem 0.38rem;
}

.doc-frl__mini-title {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.56rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  color: rgba(150, 185, 230, 0.68);
  text-transform: uppercase;
  margin-bottom: 0.28rem;
  line-height: 1.2;
}

.doc-frl__mini canvas {
  width: 100%;
  height: auto;
  max-height: 74px;
  aspect-ratio: 16 / 9;
  display: block;
  border-radius: 8px;
  border: 1px solid rgba(110, 150, 210, 0.16);
  background: rgba(5, 10, 22, 0.72);
  object-fit: fill;
}

.doc-frl__caption {
  margin: 0;
  padding: 0.75rem 0.9rem 0.85rem;
  font-size: 0.82rem;
  line-height: 1.52;
  color: rgba(165, 188, 228, 0.82);
  border-top: 1px solid rgba(110, 150, 210, 0.1);
}

@media (max-width: 900px) {
  .doc-frl__previews {
    grid-template-columns: 1fr 1fr;
  }

  .doc-frl__viewport {
    min-height: 220px;
  }
}

@media (max-width: 560px) {
  .doc-frl__previews {
    grid-template-columns: 1fr;
  }

  .doc-frl__stage {
    padding: 0.4rem 0.45rem 0.5rem;
  }

  .doc-frl__bottom {
    padding: 0.45rem 0.55rem 0.55rem;
  }
}