/* Rust Memory Visualization Engine — companion styles for theme/rust-viz.js */

.rust-viz {
  --viz-accent: var(--compiler);
  --viz-bg: #0f172a;
  --viz-panel: #0b1020;
  --viz-border: rgba(255, 255, 255, 0.1);
  --viz-text: #f8fafc;
  --viz-muted: rgba(248, 250, 252, 0.65);
  position: relative;
  margin: 2.5rem 0;
  border: 1px solid var(--viz-border);
  border-radius: 1.25rem;
  background: var(--viz-bg);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
  padding: 1.15rem 1.25rem 1.25rem;
  color: var(--viz-text);
}

.rust-viz:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--viz-accent) 70%, white 30%);
  outline-offset: 3px;
}

.rust-viz__eyebrow {
  color: var(--viz-accent);
  font-family: var(--font-display);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.rust-viz__title {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.8vw, 1.45rem);
  font-weight: 700;
  margin: 0.3rem 0 0.9rem;
  color: var(--viz-text);
}

.rust-viz__body {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 1rem;
}

@media (max-width: 760px) {
  .rust-viz__body {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ── Code panel ──────────────────────────────────────── */

.rust-viz__code {
  background: var(--viz-panel);
  border: 1px solid var(--viz-border);
  border-radius: 0.85rem;
  padding: 0.85rem 0.5rem;
  overflow-x: auto;
}

.rust-viz__code-lines {
  margin: 0;
  padding: 0 0 0 2.4rem;
  counter-reset: viz-line;
  list-style: none;
}

.rust-viz__line {
  position: relative;
  counter-increment: viz-line;
  font-family: var(--font-code);
  font-size: 0.88rem;
  line-height: 1.9;
  margin: 0 !important;
  border-radius: 0.4rem;
  padding: 0 0.5rem;
  white-space: pre;
  transition: background-color 0.25s ease;
}

.rust-viz__line::before {
  content: counter(viz-line);
  position: absolute;
  left: -1.9rem;
  width: 1.4rem;
  text-align: right;
  color: rgba(248, 250, 252, 0.3);
  font-size: 0.75rem;
}

/* High specificity needed: visual-edition.css styles `#mdbook-content main li code`
   as a light chip, which would otherwise win over the simulator's dark code lines. */
#mdbook-content main .rust-viz__line code,
.rust-viz__line code {
  background: none;
  border: none;
  padding: 0;
  color: rgba(248, 250, 252, 0.85);
  font-family: var(--font-code);
  font-weight: 400;
  font-size: inherit;
  white-space: pre;
}

#mdbook-content main .rust-viz__line--active code {
  color: #ffffff;
  font-weight: 600;
}

.rust-viz__line--active {
  background: color-mix(in srgb, var(--viz-accent) 26%, transparent 74%);
  box-shadow: inset 3px 0 0 var(--viz-accent);
}

.rust-viz__line--active code {
  color: #ffffff;
  font-weight: 600;
}

.rust-viz__line--error {
  background: color-mix(in srgb, var(--error) 30%, transparent 70%);
  box-shadow: inset 3px 0 0 var(--error);
}

/* ── Memory panel ────────────────────────────────────── */

.rust-viz__memory {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  background: var(--viz-panel);
  border: 1px solid var(--viz-border);
  border-radius: 0.85rem;
  padding: 0.85rem;
  min-height: 12rem;
}

.rust-viz__col-label {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--viz-muted);
  margin-bottom: 0.6rem;
}

.rust-viz__stack .rust-viz__col-label {
  color: color-mix(in srgb, var(--stack) 50%, white 50%);
}

.rust-viz__heap .rust-viz__col-label {
  color: color-mix(in srgb, var(--heap) 60%, white 40%);
}

.rust-viz__empty {
  color: rgba(248, 250, 252, 0.35);
  font-family: var(--font-code);
  font-size: 0.8rem;
  padding: 0.4rem 0.2rem;
}

.rust-viz__frame {
  border: 1.5px solid color-mix(in srgb, var(--stack) 55%, transparent 45%);
  border-radius: 0.7rem;
  padding: 0.5rem 0.55rem 0.55rem;
  margin-bottom: 0.7rem;
  background: color-mix(in srgb, var(--stack) 12%, transparent 88%);
  animation: rust-viz-pop 0.3s ease;
}

.rust-viz__frame--closing {
  opacity: 0.55;
  border-style: dashed;
}

.rust-viz__frame-name {
  font-family: var(--font-code);
  font-size: 0.74rem;
  font-weight: 700;
  color: color-mix(in srgb, var(--stack) 35%, white 65%);
  margin-bottom: 0.4rem;
}

.rust-viz__var {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0.5rem;
  padding: 0.32rem 0.5rem;
  margin-top: 0.35rem;
  font-family: var(--font-code);
  font-size: 0.82rem;
  transition: opacity 0.3s ease;
}

.rust-viz__var-name {
  font-weight: 700;
  color: #ffffff;
}

.rust-viz__var-value {
  color: rgba(248, 250, 252, 0.7);
  font-size: 0.76rem;
}

.rust-viz__var--moved,
.rust-viz__var--dropped {
  opacity: 0.45;
}

.rust-viz__var--moved .rust-viz__var-name,
.rust-viz__var--dropped .rust-viz__var-name {
  text-decoration: line-through;
  text-decoration-thickness: 2px;
}

.rust-viz__var--shadowed {
  opacity: 0.45;
}

.rust-viz__var--error {
  border-color: var(--error);
  background: color-mix(in srgb, var(--error) 22%, transparent 78%);
}

.rust-viz__tag {
  margin-left: auto;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
  white-space: nowrap;
}

.rust-viz__tag--owner { background: color-mix(in srgb, var(--ownership) 80%, black 20%); color: #fff; }
.rust-viz__tag--copy { background: color-mix(in srgb, var(--copy) 75%, black 25%); color: #fff; }
.rust-viz__tag--moved { background: color-mix(in srgb, var(--move) 70%, black 30%); color: #fff; }
.rust-viz__tag--borrow { background: color-mix(in srgb, var(--borrow-shared) 85%, black 15%); color: #fff; }
.rust-viz__tag--borrow-mut { background: color-mix(in srgb, var(--borrow-exclusive) 75%, black 25%); color: #fff; }
.rust-viz__tag--dropped { background: color-mix(in srgb, var(--drop) 85%, black 15%); color: #fff; }
.rust-viz__tag--shadowed { background: color-mix(in srgb, var(--compiler) 70%, black 30%); color: #fff; }
.rust-viz__tag--error { background: var(--error); color: #fff; }
.rust-viz__tag--freed { background: color-mix(in srgb, var(--drop) 85%, black 15%); color: #fff; margin-left: 0; margin-top: 0.3rem; display: inline-block; }

.rust-viz__heap-block {
  border: 1.5px solid color-mix(in srgb, var(--heap) 65%, transparent 35%);
  border-radius: 0.7rem;
  padding: 0.45rem 0.55rem;
  margin-bottom: 0.6rem;
  background: color-mix(in srgb, var(--heap) 14%, transparent 86%);
  animation: rust-viz-pop 0.3s ease;
}

.rust-viz__heap-block--freed {
  opacity: 0.45;
  border-style: dashed;
}

.rust-viz__heap-block--freed .rust-viz__heap-value {
  text-decoration: line-through;
  text-decoration-thickness: 2px;
}

.rust-viz__heap-label {
  font-family: var(--font-code);
  font-size: 0.72rem;
  font-weight: 700;
  color: color-mix(in srgb, var(--heap) 45%, white 55%);
  margin-bottom: 0.25rem;
}

.rust-viz__heap-value {
  font-family: var(--font-code);
  font-size: 0.84rem;
  color: rgba(248, 250, 252, 0.88);
  word-break: break-word;
}

/* ── Pointer arrows ──────────────────────────────────── */

.rust-viz__arrows {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}

.rust-viz__arrow {
  stroke: rgba(248, 250, 252, 0.55);
  stroke-width: 2.5;
  stroke-dasharray: 6 4;
  animation: rust-viz-flow 1.2s linear infinite;
}

.rust-viz__arrow-head {
  fill: rgba(248, 250, 252, 0.55);
}

.rust-viz__arrow--owner, .rust-viz__arrow--error { stroke: var(--ownership); }
.rust-viz__arrow--moved { stroke: var(--move); }
.rust-viz__arrow--copy { stroke: var(--copy); }
.rust-viz__arrow--borrow { stroke: color-mix(in srgb, var(--borrow-shared) 60%, white 40%); }
.rust-viz__arrow--borrow-mut { stroke: var(--borrow-exclusive); }
.rust-viz__arrow--dropped { stroke: var(--drop); }

.rust-viz__arrow-head--owner, .rust-viz__arrow-head--error { fill: var(--ownership); }
.rust-viz__arrow-head--moved { fill: var(--move); }
.rust-viz__arrow-head--copy { fill: var(--copy); }
.rust-viz__arrow-head--borrow { fill: color-mix(in srgb, var(--borrow-shared) 60%, white 40%); }
.rust-viz__arrow-head--borrow-mut { fill: var(--borrow-exclusive); }
.rust-viz__arrow-head--dropped { fill: var(--drop); }

/* ── Compiler note, caption, controls ────────────────── */

.rust-viz__note[hidden] {
  display: none;
}

.rust-viz__note {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin-top: 0.9rem;
  border-radius: 0.7rem;
  padding: 0.55rem 0.8rem;
  font-size: 0.9rem;
  line-height: 1.55;
}

.rust-viz__note--error {
  background: color-mix(in srgb, var(--error) 18%, transparent 82%);
  border: 1px solid color-mix(in srgb, var(--error) 60%, transparent 40%);
}

.rust-viz__note--ok {
  background: color-mix(in srgb, var(--valid) 16%, transparent 84%);
  border: 1px solid color-mix(in srgb, var(--valid) 55%, transparent 45%);
}

.rust-viz__note--info {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.rust-viz__note-label {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.rust-viz__note--error .rust-viz__note-label { color: #fecaca; }
.rust-viz__note--ok .rust-viz__note-label { color: #bbf7d0; }
.rust-viz__note--info .rust-viz__note-label { color: var(--viz-muted); }

.rust-viz__note-text {
  font-family: var(--font-code);
  font-size: 0.84rem;
  color: rgba(248, 250, 252, 0.92);
}

.rust-viz__caption {
  margin: 0.9rem 0 0 !important;
  font-size: 0.95rem !important;
  line-height: 1.65 !important;
  color: rgba(248, 250, 252, 0.85) !important;
  min-height: 3.2em;
}

.rust-viz__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.rust-viz__btn {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--viz-text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 0.55rem;
  padding: 0.42rem 0.9rem;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
}

.rust-viz__btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.16);
}

.rust-viz__btn:active:not(:disabled) {
  transform: scale(0.97);
}

.rust-viz__btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.rust-viz__btn--next {
  background: color-mix(in srgb, var(--viz-accent) 70%, black 30%);
  border-color: color-mix(in srgb, var(--viz-accent) 80%, white 20%);
}

.rust-viz__btn--next:hover:not(:disabled) {
  background: color-mix(in srgb, var(--viz-accent) 85%, black 15%);
}

.rust-viz__counter {
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--viz-muted);
  min-width: 3.4rem;
  text-align: center;
}

/* ── 3D scene panel ──────────────────────────────────── */

.rust-viz__scene {
  display: none;
  position: relative;
  height: 26rem;
  border: 1px solid var(--viz-border);
  border-radius: 0.85rem;
  background: radial-gradient(ellipse at 50% -20%, #1d2a44 0%, #0b1020 55%, #05080f 100%);
  overflow: hidden;
}

.rust-viz__scene canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.rust-viz__btn--mode {
  margin-left: auto;
  background: linear-gradient(135deg, color-mix(in srgb, var(--viz-accent) 45%, #1e293b 55%), #131c30);
  border-color: color-mix(in srgb, var(--viz-accent) 60%, white 40%);
}

.rust-viz__btn--mode:hover:not(:disabled) {
  background: linear-gradient(135deg, color-mix(in srgb, var(--viz-accent) 65%, #1e293b 35%), #18233a);
}

.rust-viz__fallback {
  color: rgba(248, 250, 252, 0.85);
  font-size: 0.95rem;
  margin: 0;
}

@keyframes rust-viz-pop {
  from { transform: scale(0.96); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes rust-viz-flow {
  to { stroke-dashoffset: -10; }
}

@media (prefers-reduced-motion: reduce) {
  .rust-viz__frame,
  .rust-viz__heap-block {
    animation: none;
  }
  .rust-viz__arrow {
    animation: none;
    stroke-dasharray: none;
  }
  .rust-viz__line {
    transition: none;
  }
}

/* Print / PDF export: hide the live widget chrome, show the fallback text. */
@media print {
  .rust-viz__controls,
  .rust-viz__btn,
  .rust-viz__scene {
    display: none !important;
  }
  .rust-viz__fallback {
    display: block !important;
  }
  .rust-viz__fallback[hidden] {
    display: block !important;
  }
}