.rfg-root {
  --rfg-bg: #fffdf9;
  --rfg-panel: #fff;
  --rfg-ink: #19151d;
  --rfg-muted: #6f6677;
  --rfg-line: #e8deeb;
  --rfg-soft: #fff4df;
  --rfg-glow: rgba(255, 144, 72, 0.2);

  display: grid;
  gap: 1rem;
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--rfg-line);
  border-radius: 8px;
  background:
    radial-gradient(circle at 15% 10%, rgba(255, 233, 92, 0.38), transparent 24rem),
    radial-gradient(circle at 88% 18%, rgba(159, 84, 255, 0.18), transparent 22rem),
    linear-gradient(135deg, var(--rfg-bg), #fff);
  color: var(--rfg-ink);
  box-shadow: 0 18px 50px var(--rfg-glow);
}

.theme-dark .rfg-root {
  --rfg-bg: #0d0f14;
  --rfg-panel: #151923;
  --rfg-ink: #f7f9ff;
  --rfg-muted: #aeb7c8;
  --rfg-line: #2a3140;
  --rfg-soft: #10141d;
  --rfg-glow: rgba(66, 132, 255, 0.18);

  background:
    radial-gradient(circle at 10% 8%, rgba(64, 196, 255, 0.16), transparent 22rem),
    radial-gradient(circle at 90% 18%, rgba(173, 92, 255, 0.14), transparent 24rem),
    linear-gradient(135deg, #0b0d12, var(--rfg-bg));
}

.rfg-stage {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 1rem;
}

.rfg-spool,
.rfg-z-panel,
.rfg-results article,
.rfg-band-list {
  background: color-mix(in srgb, var(--rfg-panel) 94%, transparent);
  border: 1px solid var(--rfg-line);
  border-radius: 8px;
}

.theme-dark .rfg-spool,
.theme-dark .rfg-z-panel,
.theme-dark .rfg-results article,
.theme-dark .rfg-band-list,
.theme-dark .rfg-field,
.theme-dark .rfg-presets button,
.theme-dark .rfg-actions button {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.rfg-spool {
  display: grid;
  place-items: center;
  min-height: 310px;
  padding: 1rem;
  position: relative;
  overflow: hidden;
}

.rfg-spool-rim {
  width: min(64vw, 260px);
  aspect-ratio: 1;
  border-radius: 50%;
  position: relative;
  background: conic-gradient(#f04465, #ff9f1c, #ffe66d, #2bd576, #2f8cff, #9b5cff, #f04465);
  box-shadow: inset 0 0 0 22px color-mix(in srgb, var(--rfg-panel) 30%, transparent), 0 18px 40px rgba(32, 26, 38, 0.18);
}

.theme-dark .rfg-spool-rim {
  box-shadow: inset 0 0 0 22px rgba(8, 11, 17, 0.35), 0 20px 52px rgba(0, 0, 0, 0.34);
}

.rfg-spool-core {
  position: absolute;
  inset: 31%;
  border-radius: 50%;
  background: var(--rfg-panel);
  border: 14px solid color-mix(in srgb, var(--rfg-ink) 12%, transparent);
}

.rfg-thread {
  position: absolute;
  inset: 9%;
  border-radius: 50%;
  border: 2px dashed rgba(255, 255, 255, 0.68);
}

.rfg-thread-b {
  inset: 17%;
  transform: rotate(18deg);
}

.rfg-thread-c {
  inset: 25%;
  transform: rotate(-14deg);
}

.rfg-phase {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem;
  border-radius: 8px;
  background: color-mix(in srgb, var(--rfg-panel) 84%, transparent);
  font-weight: 800;
}

.theme-dark .rfg-phase {
  background: rgba(12, 15, 22, 0.84);
}

.rfg-phase span,
.rfg-z-head span,
.rfg-field span,
.rfg-results span,
.rfg-band-title {
  color: var(--rfg-muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rfg-z-panel {
  padding: 1rem;
}

.rfg-z-head,
.rfg-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.rfg-unit {
  border: 1px solid var(--rfg-line);
  border-radius: 999px;
  background: var(--rfg-soft);
  color: var(--rfg-ink);
  padding: 0.35rem;
  display: flex;
  gap: 0.3rem;
  cursor: pointer;
}

.rfg-unit span,
.rfg-unit strong {
  border-radius: 999px;
  padding: 0.38rem 0.7rem;
  font-size: 0.72rem;
}

.rfg-root[data-unit="metric"] .rfg-unit span,
.rfg-root[data-unit="imperial"] .rfg-unit strong {
  background: var(--rfg-ink);
  color: var(--rfg-panel);
}

.theme-dark .rfg-root[data-unit="metric"] .rfg-unit span,
.theme-dark .rfg-root[data-unit="imperial"] .rfg-unit strong {
  background: #f7f9ff;
  color: #0d0f14;
}

.rfg-tower-wrap {
  display: grid;
  grid-template-columns: minmax(88px, 1fr) auto;
  gap: 1rem;
  height: 280px;
  margin-top: 1rem;
}

.rfg-tower {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: repeating-linear-gradient(0deg, color-mix(in srgb, var(--rfg-line) 50%, transparent) 0 1px, transparent 1px 28px), var(--rfg-soft);
}

.theme-dark .rfg-tower {
  background: repeating-linear-gradient(0deg, rgba(174, 183, 200, 0.14) 0 1px, transparent 1px 28px), #0b0e15;
}

.rfg-tower span {
  position: absolute;
  left: 0;
  width: 100%;
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.35);
}

.rfg-axis {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--rfg-muted);
  font-size: 0.8rem;
  font-weight: 800;
}

.rfg-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.rfg-field {
  display: grid;
  gap: 0.45rem;
  padding: 0.85rem;
  border: 1px solid var(--rfg-line);
  border-radius: 8px;
  background: var(--rfg-panel);
}

.rfg-field output {
  font-size: 1.15rem;
  font-weight: 900;
}

.rfg-field input {
  width: 100%;
  accent-color: #ff365e;
}

.rfg-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.rfg-presets button,
.rfg-actions button {
  border: 1px solid var(--rfg-line);
  border-radius: 999px;
  background: var(--rfg-panel);
  color: var(--rfg-ink);
  padding: 0.7rem 1rem;
  font-weight: 900;
  cursor: pointer;
}

.rfg-presets button.is-active,
.rfg-actions button:first-child {
  background: linear-gradient(90deg, #f04465, #ff9f1c, #2bd576, #2f8cff, #9b5cff);
  color: #fff;
  border-color: transparent;
}

.rfg-results {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.rfg-results article {
  display: grid;
  gap: 0.45rem;
  padding: 1rem;
}

.rfg-results svg {
  width: 1.35rem;
  height: 1.35rem;
  color: #2f8cff;
}

.rfg-results strong {
  font-size: clamp(1.35rem, 3vw, 2.2rem);
  line-height: 1;
}

.rfg-band-list {
  padding: 1rem;
}

#rfg-bands {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.rfg-band-row {
  display: grid;
  grid-template-columns: 0.6rem 1fr auto;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem;
  border-radius: 8px;
  background: var(--rfg-soft);
  font-size: 0.78rem;
  font-weight: 800;
}

.rfg-band-row i {
  width: 0.6rem;
  height: 1.75rem;
  border-radius: 999px;
}

.rfg-band-row span {
  min-width: 0;
}

.rfg-actions button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

@media (max-width: 820px) {
  .rfg-stage,
  .rfg-controls,
  .rfg-results,
  #rfg-bands {
    grid-template-columns: 1fr;
  }

  .rfg-root {
    padding: 0.75rem;
  }

  .rfg-spool {
    min-height: 260px;
  }

  .rfg-actions {
    align-items: stretch;
    flex-direction: column;
  }
}