/* Tomato ISA — ROM map + burned opcode catalog */

.isa-hero .deck { max-width: 40rem; }
.isa-hero .deck strong { color: var(--text); font-weight: 600; }

.isa-sheet,
.isa-usage,
.isa-files {
  padding: 2.5rem 0 3rem;
  border-bottom: 1px solid var(--rule);
  scroll-margin-top: 4rem;
}
.isa-sheet-head {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: 1.5rem 2.5rem;
  margin-bottom: 1.75rem;
  align-items: end;
}
.isa-sheet-head h2,
.isa-usage h2,
.isa-files h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.35rem);
  letter-spacing: -.04em;
  line-height: 1.15;
  margin: .55rem 0 0;
}
.isa-sheet-head > p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 36rem;
}

.isa-count {
  font: .8rem/1.5 var(--site-mono);
  color: var(--muted);
  margin: 0 0 1rem;
}
.isa-count strong { color: var(--text); font-weight: 600; }

.isa-rom {
  display: grid;
  grid-template-columns: repeat(32, minmax(0, 1fr));
  gap: .12rem;
  padding: .45rem;
  border: 1px solid var(--rule);
  background: var(--wash, color-mix(in srgb, var(--text) 3%, transparent));
}
.isa-cell {
  aspect-ratio: 1;
  min-height: 0;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
  background: transparent;
  text-decoration: none;
  color: var(--text);
  overflow: hidden;
  font: 500 .42rem/1 var(--site-mono);
  letter-spacing: -.03em;
  padding: 0;
  margin: 0;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  border-radius: 0;
}
.isa-cell span {
  display: block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}
.isa-cell.is-open {
  background: color-mix(in srgb, var(--text) 4%, transparent);
  border-color: transparent;
}
.isa-cell.is-burn {
  background: color-mix(in srgb, var(--red, var(--accent)) 16%, transparent);
  border-color: color-mix(in srgb, var(--red, var(--accent)) 45%, transparent);
  color: var(--text);
}
.isa-cell.is-burn:hover,
.isa-cell.is-burn:focus-visible,
.isa-cell.is-burn.is-active,
.isa-cell.is-peek {
  background: color-mix(in srgb, var(--red, var(--accent)) 28%, transparent);
  outline: 2px solid var(--red, var(--accent));
  outline-offset: 1px;
  z-index: 1;
}
.isa-cell.is-open:hover,
.isa-cell.is-open:focus-visible,
.isa-cell.is-open.is-peek {
  outline: 1px solid color-mix(in srgb, var(--text) 35%, transparent);
  outline-offset: 0;
  z-index: 1;
}

.isa-peek {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  grid-template-areas:
    "addr name"
    "addr op"
    "link link";
  column-gap: .85rem;
  row-gap: .2rem;
  align-items: baseline;
  margin: .65rem 0 .55rem;
  padding: .75rem .9rem;
  border: 1px solid var(--rule);
  background: var(--wash, color-mix(in srgb, var(--text) 3%, transparent));
  min-height: 4.25rem;
}
.isa-peek-addr {
  grid-area: addr;
  font: 600 .85rem/1.3 var(--site-mono);
  color: var(--accent, var(--red));
}
.isa-peek-name {
  grid-area: name;
  font: 600 .95rem/1.3 var(--site-sans, inherit);
  letter-spacing: -.02em;
}
.isa-peek-op {
  grid-area: op;
  font: .82rem/1.45 var(--site-sans, inherit);
  color: var(--muted);
}
.isa-peek-link {
  grid-area: link;
  margin-top: .45rem;
  font: .78rem/1.4 var(--site-mono);
  color: var(--red, var(--accent));
  text-decoration: underline;
  text-underline-offset: .2em;
  width: fit-content;
}
.isa-peek-link[hidden] { display: none !important; }

.isa-rom-legend {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1.5rem;
  margin: .55rem 0 1.5rem;
  font: .75rem/1.5 var(--site-mono);
  color: var(--muted);
}
.isa-leg-burn::before,
.isa-leg-open::before {
  content: "";
  display: inline-block;
  width: .7rem;
  height: .7rem;
  margin-right: .45rem;
  vertical-align: -.05rem;
  border: 1px solid var(--rule);
}
.isa-leg-burn::before {
  background: color-mix(in srgb, var(--red, var(--accent)) 16%, transparent);
  border-color: color-mix(in srgb, var(--red, var(--accent)) 45%, transparent);
}
.isa-leg-open::before {
  background: color-mix(in srgb, var(--text) 4%, transparent);
  border-color: transparent;
}

.isa-catalog {
  display: grid;
  gap: 1.35rem;
}
.isa-group-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: .15rem;
  padding-bottom: .35rem;
  border-bottom: 1px solid var(--rule);
}
.isa-group-head h3 {
  margin: 0;
  font-size: .95rem;
  letter-spacing: -.02em;
}
.isa-group-head span {
  font: .72rem/1.4 var(--site-mono);
  color: var(--muted);
}

.isa-ops {
  list-style: none;
  margin: 0;
  padding: 0;
}
.isa-op {
  display: grid;
  grid-template-columns: 4rem 7rem 6rem minmax(0, 1fr);
  column-gap: .85rem;
  row-gap: .1rem;
  padding: .48rem 0;
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
  scroll-margin-top: 4.5rem;
  align-items: baseline;
}
.isa-op:target {
  background: color-mix(in srgb, var(--red, var(--accent)) 8%, transparent);
  box-shadow: inset 3px 0 0 var(--red, var(--accent));
  padding-inline: .85rem;
  margin-inline: -.85rem;
}
.isa-op-addr {
  font: .78rem/1.4 var(--site-mono);
  color: var(--muted);
}
.isa-op-name {
  font: 600 .88rem/1.3 var(--site-sans, inherit);
  letter-spacing: -.01em;
}
.isa-op-enc {
  font: .7rem/1.35 var(--site-mono);
  color: var(--muted);
}
.isa-op-body {
  margin: 0;
  font-size: .86rem;
  line-height: 1.4;
  color: var(--text);
  grid-column: 4;
}
.isa-op-why {
  margin: 0;
  grid-column: 4;
  font-size: .75rem;
  line-height: 1.35;
  color: var(--muted);
}

.isa-steps {
  margin: 1.25rem 0 0;
  padding-left: 1.2rem;
  max-width: 48rem;
}
.isa-steps li {
  padding: .45rem 0;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--muted);
}
.isa-steps strong { color: var(--text); }
.isa-note {
  margin: 1.35rem 0 0;
  max-width: 48rem;
  font-size: .95rem;
  line-height: 1.7;
  color: var(--muted);
}

.isa-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.75rem;
  padding: 2rem 0 3rem;
}
.isa-jump a {
  color: var(--red, var(--accent));
  text-decoration: underline;
  text-underline-offset: .25em;
}

@media (max-width: 900px) {
  .isa-op {
    grid-template-columns: 3.75rem 1fr auto;
    grid-template-areas:
      "addr name enc"
      "body body body"
      "why why why";
  }
  .isa-op-addr { grid-area: addr; }
  .isa-op-name { grid-area: name; }
  .isa-op-enc { grid-area: enc; justify-self: end; }
  .isa-op-body { grid-column: 1 / -1; grid-area: body; margin-top: .35rem; }
  .isa-op-why { grid-column: 1 / -1; grid-area: why; }
  .isa-rom { grid-template-columns: repeat(16, minmax(0, 1fr)); gap: .1rem; padding: .35rem; }
  .isa-cell { font-size: .38rem; }
  .isa-peek {
    position: sticky;
    bottom: .75rem;
    z-index: 5;
    margin-top: .85rem;
    box-shadow: 0 8px 28px color-mix(in srgb, var(--text) 12%, transparent);
    background: var(--bg, Canvas);
  }
}

@media (max-width: 700px) {
  .isa-sheet-head { grid-template-columns: 1fr; gap: .85rem; }
  .isa-rom { grid-template-columns: repeat(16, minmax(0, 1fr)); gap: .08rem; padding: .3rem; }
  .isa-cell span { display: none; }
  .isa-cell.is-burn { background: color-mix(in srgb, var(--red, var(--accent)) 55%, transparent); }
}