.rtcd-metro {
  --rtcd-orange: #f97316;
  --rtcd-ink: #09090b;
  --rtcd-muted: #5c5d60;
  --rtcd-soft: #f1f1f3;
  --rtcd-line: #e4e4e7;
  width: min(920px, 100%);
  margin: 1.4rem auto 0;
  padding: 1.25rem 1.1rem 1.6rem;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.06);
  color: var(--rtcd-ink);
  font-family: Inter, "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

.rtcd-metro__head {
  margin-bottom: 1rem;
}

.rtcd-metro__title {
  margin: 0 0 0.55rem;
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.rtcd-metro__desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: rgba(9, 9, 11, 0.72);
}

.rtcd-metro__toolbar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border: 1px solid var(--rtcd-line);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}

.rtcd-metro__tool {
  appearance: none;
  border: 0;
  border-right: 1px solid var(--rtcd-line);
  background: #fff;
  padding: 0.85rem 0.55rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--rtcd-ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 52px;
}

.rtcd-metro__tool:last-child { border-right: 0; }

.rtcd-metro__tool:hover { background: #fafafa; }

.rtcd-metro__tool svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  opacity: 0.72;
}

.rtcd-metro__beats-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 0.85rem 0 -0.15rem;
}

.rtcd-metro__beat-now-wrap {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  min-height: 1.8rem;
}

.rtcd-metro__beat-now-label {
  font-size: 0.78rem;
  color: rgba(9, 9, 11, 0.45);
}

.rtcd-metro__beat-now {
  font-size: 1.55rem;
  font-weight: 650;
  line-height: 1;
  color: rgba(9, 9, 11, 0.28);
  font-variant-numeric: tabular-nums;
  min-width: 1.2ch;
}

.rtcd-metro__beat-now.is-on {
  color: var(--rtcd-orange);
}

.rtcd-metro__view-toggle {
  appearance: none;
  border: 1px solid var(--rtcd-line);
  background: #fff;
  border-radius: 999px;
  padding: 0.28rem 0.7rem 0.28rem 0.55rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font: inherit;
  font-size: 0.82rem;
  color: var(--rtcd-ink);
  cursor: pointer;
}

.rtcd-metro__view-toggle svg {
  width: 1.05rem;
  height: 1.05rem;
  flex-shrink: 0;
}

.rtcd-metro__view-toggle.is-single {
  border-color: rgba(232, 109, 34, 0.45);
  color: var(--rtcd-orange);
}

.rtcd-metro__beats {
  display: grid;
  grid-template-columns: repeat(var(--beats, 4), minmax(0, 1fr));
  gap: 0.55rem;
  margin: 0.85rem 0 0.35rem;
}

.rtcd-metro__beats[data-view="single"] {
  grid-template-columns: minmax(0, 1fr);
  justify-items: center;
  max-width: 120px;
  margin-left: auto;
  margin-right: auto;
}

.rtcd-metro__beats[data-view="single"] .rtcd-metro__beat {
  width: min(100%, 96px);
}

.rtcd-metro__beat {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
  height: 96px;
  position: relative;
}

.rtcd-metro__beat-num {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1.15rem;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  color: rgba(9, 9, 11, 0.4);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}

.rtcd-metro__beat-num.is-live,
.rtcd-metro__beat.is-live .rtcd-metro__beat-num {
  color: var(--rtcd-orange);
}

.rtcd-metro__seg {
  height: 22px;
  border-radius: 6px;
  background: var(--rtcd-soft);
  transition: background 0.12s ease;
}

.rtcd-metro__seg.is-on { background: var(--rtcd-muted); }

.rtcd-metro__seg.is-live { background: var(--rtcd-orange); }

.rtcd-metro__beats {
  margin-bottom: 1.35rem;
}

.rtcd-metro__bpm-block {
  text-align: center;
  margin: 0.8rem 0 0.2rem;
}

.rtcd-metro__bpm-label {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: rgba(9, 9, 11, 0.55);
  margin-bottom: 0.15rem;
}

.rtcd-metro__bpm-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

.rtcd-metro__bpm-step {
  appearance: none;
  border: 0;
  background: transparent;
  color: rgba(9, 9, 11, 0.35);
  font-size: 2.4rem;
  line-height: 1;
  width: 2.4rem;
  cursor: pointer;
  padding: 0;
}

.rtcd-metro__bpm-step:hover { color: var(--rtcd-ink); }

.rtcd-metro__bpm-value {
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: clamp(3.2rem, 10vw, 4.6rem);
  font-weight: 500;
  color: var(--rtcd-muted);
  line-height: 1;
  min-width: 2.5ch;
  cursor: pointer;
  padding: 0;
}

.rtcd-metro__tempo-name {
  margin: 0.15rem 0 0;
  font-size: 0.95rem;
  color: rgba(9, 9, 11, 0.55);
}

.rtcd-metro__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.35rem;
  margin-top: 0.35rem;
}

.rtcd-metro__play {
  appearance: none;
  border: 0;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  cursor: pointer;
  background: #111;
  color: #fff;
  transition: background 0.15s ease, transform 0.08s ease, opacity 0.15s ease;
}

.rtcd-metro__play svg {
  width: 22px;
  height: 22px;
}

.rtcd-metro__play.is-playing {
  background: #111;
  color: #fff;
}

.rtcd-metro__play:hover { opacity: 0.88; }

.rtcd-metro__play:active { transform: scale(0.96); }

.rtcd-metro__tap {
  appearance: none;
  border: 1px solid var(--rtcd-line);
  width: 80px;
  height: 80px;
  border-radius: 999px;
  background: #fff;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--rtcd-ink);
  cursor: pointer;
}

.rtcd-metro__tap:active { background: #fafafa; }

.rtcd-metro__timer-badge {
  margin-left: 0.35rem;
  font-size: 0.82rem;
  color: var(--rtcd-orange);
  font-variant-numeric: tabular-nums;
}

.rtcd-metro-modal {
  position: fixed;
  inset: 0;
  z-index: 55;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(17, 17, 17, 0.28);
}

.rtcd-metro-modal[hidden] { display: none; }

.rtcd-metro-modal__panel {
  width: min(420px, 100%);
  background: #fff;
  border-radius: 14px;
  padding: 1rem 1rem 1.1rem;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.18);
}

.rtcd-metro-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.rtcd-metro-modal__head h3 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
}

.rtcd-metro-modal__close {
  appearance: none;
  border: 0;
  background: transparent;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: rgba(9, 9, 11, 0.55);
}

.rtcd-metro-modal__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.rtcd-metro-modal__choice {
  appearance: none;
  border: 1px solid var(--rtcd-line);
  border-radius: 10px;
  background: #fff;
  padding: 0.65rem 0.5rem;
  font: inherit;
  cursor: pointer;
}

.rtcd-metro-modal__choice.is-on {
  border-color: var(--rtcd-orange);
  color: var(--rtcd-orange);
  background: rgba(249, 115, 22, 0.06);
}

.rtcd-metro-modal__row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 0.5rem 0;
}

.rtcd-metro-modal__row input {
  width: 4.5rem;
  padding: 0.55rem;
  border: 1px solid var(--rtcd-line);
  border-radius: 8px;
  font: inherit;
  text-align: center;
}

.rtcd-metro-modal__row button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: var(--rtcd-orange);
  color: #fff;
  padding: 0.55rem 1rem;
  font: inherit;
  cursor: pointer;
}

.rtcd-metro-modal__hint {
  margin: 0.35rem 0 0;
  font-size: 0.85rem;
  color: rgba(9, 9, 11, 0.55);
  line-height: 1.5;
}

@media (max-width: 640px) {
  .rtcd-metro__toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rtcd-metro__tool:nth-child(2) { border-right: 0; }
  .rtcd-metro__tool:nth-child(1),
  .rtcd-metro__tool:nth-child(2) { border-bottom: 1px solid var(--rtcd-line); }
}

.rtcd-metro-modal__panel--wide {
  width: min(860px, 100%);
  max-height: min(92dvh, 900px);
  overflow: auto;
}

.rtcd-metro-modal__head--stack {
  align-items: flex-start;
  gap: 0.75rem;
}

.rtcd-metro-modal__desc {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  color: rgba(9, 9, 11, 0.62);
  line-height: 1.5;
}

.rtcd-metro__tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem;
  padding: 0.25rem;
  margin-bottom: 1rem;
  background: #f4f4f5;
  border-radius: 10px;
}

.rtcd-metro__tab {
  appearance: none;
  border: 0;
  background: transparent;
  border-radius: 8px;
  padding: 0.7rem 0.5rem;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: rgba(9, 9, 11, 0.62);
  cursor: pointer;
}

.rtcd-metro__tab.is-on {
  background: #fff;
  color: #09090b;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.12);
}

.rtcd-metro__sub-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
}

.rtcd-metro__sub-choice,
.rtcd-metro__pad {
  appearance: none;
  border: 1px solid #e4e4e7;
  border-radius: 10px;
  background: #fff;
  min-height: 72px;
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0.4rem;
}

.rtcd-metro__sub-choice:hover,
.rtcd-metro__pad:hover {
  border-color: #d4d4d8;
  background: #fafafa;
}

.rtcd-metro__sub-choice.is-on {
  background: #18181b;
  border-color: #18181b;
  color: #fff;
}

.rtcd-metro__sub-choice.is-on .rtcd-metro__icon svg,
.rtcd-metro__sub-choice.is-on .rtcd-metro__icon path {
  fill: #fff;
  stroke: #fff;
}

.rtcd-metro__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
}

.rtcd-metro__icon svg {
  height: 36px;
  width: auto;
  max-width: 100%;
  fill: currentColor;
  stroke: currentColor;
}

.rtcd-metro__tool .rtcd-metro__icon svg {
  height: 22px;
}

.rtcd-metro__fallback {
  font-size: 0.75rem;
  word-break: break-all;
}

.rtcd-metro__staff {
  border: 1px solid #e4e4e7;
  border-radius: 12px;
  padding: 0.85rem 1rem;
  background: #fff;
  min-height: 96px;
}

.rtcd-metro__staff-line {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-height: 64px;
}

.rtcd-metro__ts {
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1;
  color: #09090b;
}

.rtcd-metro__staff-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: flex-end;
}

.rtcd-metro__staff-note {
  display: inline-flex;
  align-items: flex-end;
}

.rtcd-metro__staff-note .rtcd-metro__icon svg {
  height: 42px;
}

.rtcd-metro__staff-note.is-muted {
  opacity: 0.45;
}

.rtcd-metro__staff-empty {
  color: rgba(9, 9, 11, 0.45);
  font-size: 0.92rem;
}

.rtcd-metro__staff-meta {
  margin: 0.55rem 0 0;
  font-size: 0.85rem;
  color: rgba(9, 9, 11, 0.55);
}

.rtcd-metro__edit-tools {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 0.9rem 0 0.75rem;
}

.rtcd-metro__tool-round {
  appearance: none;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid #e4e4e7;
  background: #fff;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
}

.rtcd-metro__tool-round.is-danger {
  background: #dc2626;
  border-color: #dc2626;
  color: #fff;
}

.rtcd-metro__palette-wrap {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 1rem;
}

.rtcd-metro__palette {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.45rem;
  align-content: start;
}

.rtcd-metro__pad {
  min-height: 44px;
}

.rtcd-metro__pad .rtcd-metro__icon svg {
  height: 26px;
}

.rtcd-metro__footer-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1rem;
}

.rtcd-metro__share,
.rtcd-metro__apply {
  appearance: none;
  border: 0;
  border-radius: 10px;
  padding: 0.85rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.rtcd-metro__share {
  background: #3f6212;
  color: #fff;
}

.rtcd-metro__apply {
  background: #3f3f46;
  color: #fff;
}

.rtcd-metro__share:disabled,
.rtcd-metro__apply:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

@media (max-width: 720px) {
  .rtcd-metro__sub-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rtcd-metro__palette-wrap { grid-template-columns: 1fr; }
  .rtcd-metro__palette { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .rtcd-metro__footer-actions { grid-template-columns: 1fr; }
}