.applet--lfsr15{
  --good: #39d98a;
  --warn: #ff9a3c;
  --slot: rgba(0, 0, 0, 0.45);

  background: transparent;
  padding: 0.75rem;
}

/* ============================
   Controls: FORCE the layout
   ============================ */

.applet--lfsr15 .seed-row,
.applet--lfsr15 .run-row{
  display: flex !important;
  align-items: center !important;
  gap: 0.45rem !important;
  width: 100% !important;
  min-width: 0 !important;
  flex-wrap: nowrap !important;
}

.applet--lfsr15 .controls > * + *{
  margin-top: 0.65rem;
}

.applet--lfsr15 .btn-group{
  display: inline-flex !important;
  gap: 0.45rem !important;
  flex: 0 0 auto !important;
  white-space: nowrap !important;
}

/* Seed input: DO NOT allow width:100% to win */
.applet--lfsr15 #seedInput{
  width: auto !important;
  flex: 1 1 420px !important;
  min-width: 180px !important;
  max-width: 100% !important;
}

/* Speed: keep label + slider on the right */
.applet--lfsr15 .speed-label{
  margin-left: auto !important;
  flex: 0 0 auto !important;
  white-space: nowrap !important;
}

.applet--lfsr15 #speedRange{
  width: auto !important;
  flex: 0 0 320px !important;
  min-width: 180px !important;
}

/* Stack only when genuinely narrow */
@media (max-width: 560px){
  .applet--lfsr15 .seed-row,
  .applet--lfsr15 .run-row{
    flex-wrap: wrap !important;
  }

  .applet--lfsr15 #seedInput{
    width: 100% !important;
    flex: 1 1 100% !important;
    min-width: 0 !important;
  }

  .applet--lfsr15 .speed-label{
    margin-left: 0 !important;
    width: 100% !important;
  }

  .applet--lfsr15 #speedRange{
    flex: 1 1 100% !important;
    min-width: 0 !important;
  }
}

/* ============================
   Visualizer
   ============================ */

.applet--lfsr15 .viz{
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow: hidden;
}

.applet--lfsr15 .legend{
  font-family: var(--ui);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  font-size: 0.8rem;
  color: var(--muted);
}

.applet--lfsr15 .legend-item{
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.applet--lfsr15 .legend-swatch{
  width: 12px;
  height: 12px;
  border-radius: 2px;
}
.applet--lfsr15 .legend-swatch.rmb{ background: var(--warn); }
.applet--lfsr15 .legend-swatch.lmb{ background: var(--good); }

.applet--lfsr15 .register{
  display: grid;
  grid-template-columns: repeat(15, minmax(0, 1fr));
  gap: 6px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.applet--lfsr15 .bit{
  position: relative;

  background: var(--panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);

  min-height: 34px;

  display: flex;
  align-items: center;
  justify-content: center;

  min-width: 0;
}

.applet--lfsr15 .bit .value{
  font-family: var(--mono);
  font-weight: 900;
  font-size: 0.95rem;
  transform: translateY(5px);
}

.applet--lfsr15 .bit .index{
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  font-weight: 900;
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  color: var(--muted);
  pointer-events: none;
}

/* Remove border-only highlights */
.applet--lfsr15 .bit.rmb-active,
.applet--lfsr15 .bit.lmb-target{
  border-color: var(--border-soft);
}

/* Full-tile highlights */
.applet--lfsr15 .bit.rmb-active{
  background: color-mix(in oklab, var(--warn) 18%, var(--panel));
}

.applet--lfsr15 .bit.lmb-target{
  background: color-mix(in oklab, var(--good) 18%, var(--panel));
}

.applet--lfsr15 .xor-bubble{
  position: absolute;
  background: rgba(0, 0, 0, 0.65);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  font-family: var(--mono);
  font-weight: 900;
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 420px){
  .applet--lfsr15 .register{ gap: 4px; }
  .applet--lfsr15 .bit{ min-height: 30px; }
  .applet--lfsr15 .bit .value{ font-size: 0.9rem; }
}