.fifo-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  align-items: end;
  margin-bottom: 0.85rem;
}

.fifo-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.fifo-field label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.fifo-field select,
.fifo-field input {
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  min-width: 4.5rem;
}

.flag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0.5rem 0 0.85rem;
  font-family: var(--mono);
  font-size: 0.9rem;
}
.flag {
  padding: 0.35rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface2);
}
.flag.on.empty {
  background: color-mix(in srgb, #e6a800 22%, var(--surface));
  border-color: #c45c00;
  font-weight: 700;
}
.flag.on.full {
  background: var(--err-bg, #fdecea);
  border-color: var(--err, #b33);
  font-weight: 700;
  color: var(--err, #b33);
}
.flag.ok {
  background: var(--ok-bg, #e7f6ec);
  border-color: var(--ok, #1b7a3d);
  color: var(--ok, #1b7a3d);
  font-weight: 700;
}

.slot-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.75rem 0 1rem;
}
.slot {
  position: relative;
  width: 4.2rem;
  min-height: 4.2rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  font-family: var(--mono);
  font-size: 0.78rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
}
.slot .idx {
  color: var(--muted);
  font-size: 0.7rem;
}
.slot .val {
  font-weight: 700;
  font-size: 0.95rem;
}
.slot.occupied {
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
  border-color: var(--accent);
}
.slot .ptr {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
  white-space: nowrap;
}
.slot .ptr.wr {
  top: -0.55rem;
  background: color-mix(in srgb, var(--accent) 30%, var(--surface));
  color: var(--ink);
}
.slot .ptr.rd {
  bottom: -0.55rem;
  background: color-mix(in srgb, #2a7 30%, var(--surface));
  color: var(--ink);
}
.slot .ptr.both {
  top: -0.55rem;
  background: color-mix(in srgb, #e6a800 35%, var(--surface));
}

.ptr-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-family: var(--mono);
  font-size: 0.88rem;
  margin-bottom: 0.85rem;
}

.event-log {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 11rem;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 0.8rem;
  background: var(--surface2);
}
.event-log li {
  padding: 0.35rem 0.65rem;
  border-bottom: 1px solid var(--line);
}
.event-log li:last-child {
  border-bottom: none;
}
.event-log .ok {
  color: var(--ok, #1b7a3d);
}
.event-log .bad {
  color: var(--err, #b33);
}

.fifo-meta {
  margin: 0.35rem 0 0.65rem;
  font-size: 0.88rem;
  color: var(--muted);
}