:root {
  color-scheme: light dark;
  --bg: #0f1218;
  --surface: #171b24;
  --text: #e8ecf4;
  --muted: #9aa4b8;
  --border: #2a3140;
  --phase-in: #4ade80;
  --phase-out: #60a5fa;
  --phase-hold: #c084fc;
  --accent: #f59e0b;
  --focus: #fbbf24;
  --danger: #f87171;

  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Ubuntu,
    Cantarell,
    Noto Sans,
    sans-serif;
  line-height: 1.5;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6fa;
    --surface: #ffffff;
    --text: #141822;
    --muted: #5c677a;
    --border: #d6dbe8;
    --accent: #b45309;
    --danger: #b91c1c;
    --phase-in: #16a34a;
    --phase-out: #2563eb;
    --phase-hold: #7c3aed;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

.app {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1.25rem clamp(1rem, 4vw, 2rem) 3rem;
}

.site-disclaimer {
  margin: 2rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--muted);
  text-align: center;
}

.header .site-title {
  margin: 0 0 0.35rem;
  padding: 0;
  border: none;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.15;
  color: inherit;
}

.pattern-panel-title-field {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  min-width: 0;
}

.pattern-panel-session-title-input {
  font-size: 0.9375rem;
  line-height: 1.35;
}

.editable-field-hint {
  margin: 0.3rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.35;
  font-weight: 400;
  color: var(--muted);
}

.session-title-input {
  appearance: none;
  display: block;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  line-height: 1.15;
}

.session-title-input::placeholder {
  color: color-mix(in srgb, var(--muted) 70%, var(--text));
}

.session-title-input:focus {
  outline: none;
}

.session-title-input:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 55%, var(--border));
  outline-offset: 3px;
  border-radius: 4px;
}

.tagline {
  /* Hidden: keep minimal header; copy remains in HTML for SEO / future use. */
  display: none;
  margin: 0.35rem 0 0;
  color: var(--muted);
  max-width: 36rem;
  font-size: 0.9375rem;
  line-height: 1.45;
}

.main {
  display: grid;
  gap: 2rem;
  margin-top: 1.75rem;
}

.main-viz-stack {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  min-width: 0;
}

.main-side-column {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  min-width: 0;
}

@media (min-width: 900px) {
  .main {
    grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
    grid-template-rows: auto;
    align-items: start;
    gap: 2.5rem;
  }

  .main-viz-stack {
    display: contents;
  }

  .main-side-column {
    grid-column: 2;
    grid-row: 1;
    gap: 2rem;
  }

  .viz {
    grid-column: 1;
    grid-row: 1;
    position: sticky;
    top: 1rem;
    align-self: start;
    z-index: 1;
  }
}

.viz {
  background: color-mix(in srgb, var(--surface) 96%, var(--border));
  border: 1px solid color-mix(in srgb, var(--border) 78%, transparent);
  border-radius: 16px;
  padding: 1.25rem 1rem;
  box-shadow:
    0 1px 0 color-mix(in srgb, var(--text) 4%, transparent),
    0 14px 38px color-mix(in srgb, var(--bg) 55%, #000 12%);
}

.viz-ring-wrap {
  position: relative;
  width: 100%;
  max-width: min(280px, 72vmin);
  margin-inline: auto;
  aspect-ratio: 1;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.viz-svg {
  display: block;
  width: 100%;
  height: 100%;
  filter: drop-shadow(
    0 5px 14px color-mix(in srgb, var(--bg) 50%, #0a0c10 35%)
  );
}

.viz-cue-label {
  display: block;
  font-weight: 600;
  font-size: clamp(0.62rem, 2.4vmin, 0.72rem);
  letter-spacing: 0.02em;
  color: var(--muted);
  text-align: center;
  max-width: 4.5rem;
  line-height: 1.15;
}

.viz-nasal-cue {
  position: absolute;
  top: 6%;
  left: 4%;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.12rem;
  color: var(--muted);
  pointer-events: none;
  font-size: clamp(0.68rem, 2.8vmin, 0.82rem);
  line-height: 1;
}

.viz-nasal-cue--off {
  display: none;
}

.viz-nasal-arrow {
  display: block;
  font-weight: 700;
  color: var(--text);
}

.viz-nasal-nose-svg {
  display: block;
  color: var(--muted);
}

.viz-mouth-cue {
  position: absolute;
  bottom: 6%;
  left: 4%;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.12rem;
  color: var(--muted);
  pointer-events: none;
  font-size: clamp(0.68rem, 2.8vmin, 0.82rem);
  line-height: 1;
}

.viz-mouth-cue--off {
  display: none;
}

.viz-mouth-arrow {
  display: block;
  font-weight: 700;
  color: var(--text);
}

.viz-mouth-svg {
  display: block;
  color: var(--muted);
}

.viz-body-meter {
  position: absolute;
  right: 4%;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.14rem;
  color: var(--muted);
  pointer-events: none;
  font-size: clamp(0.68rem, 2.8vmin, 0.82rem);
  line-height: 1;
}

.viz-body-meter .viz-cue-label {
  text-align: right;
}

.viz-body-meter--chest {
  top: 6%;
}

.viz-body-meter--stomach {
  bottom: 6%;
}

.viz-chest-meter--off,
.viz-stomach-meter--off {
  display: none;
}

.viz-meter-track {
  width: 0.52rem;
  height: clamp(2.25rem, 9vmin, 2.85rem);
  border-radius: 4px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 88%, var(--border));
  overflow: hidden;
}

.viz-meter-fill {
  width: 100%;
  height: 100%;
  transform: scaleY(0);
  transform-origin: bottom center;
  background: color-mix(in srgb, var(--accent) 75%, var(--text));
  will-change: transform;
}

.viz-center-readout {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  pointer-events: none;
}

.viz-center-readout-inner {
  width: min(52%, 100%);
  max-width: 52%;
  min-width: 0;
  padding: 0.45rem 0.5rem 0.52rem;
  box-sizing: border-box;
  border-radius: 12px;
  background: color-mix(in srgb, var(--surface) 88%, var(--muted));
  border: 1px solid color-mix(in srgb, var(--border) 82%, transparent);
}

.viz-track-bg {
  stroke: color-mix(in srgb, var(--border) 45%, var(--muted));
  stroke-width: 13;
}

.viz-phase-in {
  stroke: var(--phase-in);
}

.viz-phase-out {
  stroke: var(--phase-out);
}

.viz-phase-hold {
  stroke: var(--phase-hold);
}

.viz-segments-path-soft {
  fill: none;
  stroke-linecap: round;
  stroke-width: 19;
}

.viz-segments-path-strong {
  fill: none;
  stroke-linecap: round;
  stroke-width: 11.5;
}

.viz-phase-in.viz-segments-path-soft {
  opacity: 0.24;
}

.viz-phase-out.viz-segments-path-soft {
  opacity: 0.22;
}

.viz-phase-hold.viz-segments-path-soft {
  opacity: 0.2;
}

.viz-ticks {
  pointer-events: none;
}

.viz-tick {
  stroke: color-mix(in srgb, var(--muted) 88%, var(--border));
  stroke-width: 1.85;
  stroke-linecap: round;
  opacity: 0.7;
}

.viz-dot-marker {
  pointer-events: none;
}

.viz-dot-outer {
  fill: color-mix(in srgb, var(--accent) 18%, var(--surface));
  stroke: color-mix(in srgb, var(--accent) 52%, var(--border));
  stroke-width: 1.35;
}

.viz-dot-core {
  fill: var(--accent);
  stroke: color-mix(in srgb, var(--surface) 40%, transparent);
  stroke-width: 1.4;
  transform-box: fill-box;
  transform-origin: center center;
}

#viz-svg[data-phase='in'] .viz-dot-core {
  fill: color-mix(in srgb, var(--phase-in) 38%, var(--accent));
}

#viz-svg[data-phase='out'] .viz-dot-core {
  fill: color-mix(in srgb, var(--phase-out) 38%, var(--accent));
}

#viz-svg[data-phase='hold'] .viz-dot-core {
  fill: color-mix(in srgb, var(--phase-hold) 35%, var(--accent));
}

@keyframes viz-dot-pulse {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.07);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .viz.viz-playing .viz-dot-core {
    animation: viz-dot-pulse 3.1s ease-in-out infinite alternate;
  }
}

.viz-readout-meta {
  margin-top: 1rem;
  text-align: center;
}

.viz-session-timer {
  margin-top: 0.5rem;
  padding-top: 0;
}

.viz-session-timer-summary {
  appearance: none;
  -webkit-appearance: none;
  box-sizing: border-box;
  display: block;
  width: 100%;
  margin: 0;
  padding: 0.35rem 0.4rem;
  font: inherit;
  text-align: center;
  color: inherit;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    color 160ms ease-out,
    filter 160ms ease-out;
}

.viz-session-timer-summary:hover:not(:disabled) {
  filter: brightness(1.08);
}

.viz-session-timer-summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.viz-session-timer-editor {
  margin-top: 0.65rem;
}

.viz-session-timer-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.35rem 0.45rem;
  margin-bottom: 0;
}

.viz-session-timer-field {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.75rem;
  color: var(--muted);
}

.viz-session-timer-input {
  width: 3.25rem;
  min-width: 0;
  padding: 0.2rem 0.35rem;
  font: inherit;
  font-size: 0.8125rem;
  line-height: 1.25;
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 88%, var(--border));
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
}

.viz-session-timer-input:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 55%, var(--border));
  outline-offset: 1px;
}

.viz-session-timer-controls .btn.small {
  margin-left: 0.15rem;
}

.viz-session-timer-display {
  display: block;
  margin: 0;
  min-height: 1.35em;
  font-size: 0.9375rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  pointer-events: none;
}

.share-panel-textarea {
  appearance: none;
  display: block;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  min-height: calc(1.45 * 1em);
  max-height: 12rem;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0;
  resize: none;
  overflow-wrap: break-word;
  overflow-x: hidden;
  background: transparent;
  font: inherit;
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--text);
}

.share-panel-textarea::placeholder {
  color: color-mix(in srgb, var(--muted) 70%, var(--text));
}

.share-panel-textarea:focus {
  outline: none;
}

.share-panel-textarea:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 55%, var(--border));
  outline-offset: 3px;
  border-radius: 4px;
}

.viz-center-readout .phase-segment-caption {
  margin: 0 0 0.2rem;
  width: 100%;
  min-width: 0;
  font-size: clamp(0.72rem, 2.9vmin, 0.875rem);
  font-weight: 500;
  line-height: 1.3;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.viz-center-readout .phase-segment-caption:empty {
  display: none;
}

.viz-center-readout .phase-label {
  margin: 0;
  font-size: clamp(0.95rem, 3.8vmin, 1.125rem);
  font-weight: 650;
  letter-spacing: 0.02em;
  line-height: 1.28;
  color: var(--text);
}

.viz-center-readout .phase-countdown {
  margin: 0.25rem 0 0;
  color: var(--muted);
  min-height: 1.35em;
  font-size: clamp(0.8rem, 3vmin, 0.9375rem);
  line-height: 1.35;
  font-variant-numeric: tabular-nums;
}

.cycle-total {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.templates-panel,
.pattern-panel,
.share-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  min-width: 0;
}

.pattern-panel {
  display: flex;
  flex-direction: column;
}

.pattern-panel-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.templates-details,
.pattern-details {
  margin: 0;
  min-width: 0;
}

.templates-summary,
.pattern-summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  cursor: pointer;
  user-select: none;
  color: var(--text);
}

.templates-summary::-webkit-details-marker,
.pattern-summary::-webkit-details-marker {
  display: none;
}

.templates-summary::marker,
.pattern-summary::marker {
  content: '';
}

/* Chevron mirrors .segment-cues-summary affordance */
.templates-summary::after,
.pattern-summary::after {
  content: '';
  flex-shrink: 0;
  width: 0.35em;
  height: 0.35em;
  margin-left: auto;
  border-right: 1.5px solid color-mix(in srgb, var(--muted), var(--text) 12%);
  border-bottom: 1.5px solid color-mix(in srgb, var(--muted), var(--text) 12%);
  transform: translateY(-0.05em) rotate(-45deg);
  transition: transform 0.15s ease;
}

.templates-details[open] > .templates-summary::after,
.pattern-details[open] > .pattern-summary::after {
  transform: translateY(0.08em) rotate(45deg);
}

.templates-summary:focus-visible,
.pattern-summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 10px;
}

.templates-summary .templates-panel-title {
  margin: 0;
}

.pattern-summary .templates-panel-title {
  margin: 0;
}

.templates-details-inner,
.pattern-details-inner {
  margin-top: 0.65rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--border);
}

.templates-panel-title {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.share-panel-title {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  color: var(--muted);
}

.share-panel-heading-label {
  cursor: text;
  font: inherit;
  font-weight: inherit;
  color: inherit;
}

.share-panel-lead {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.45;
}

.template-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.template-list li {
  margin: 0;
}

.playback-panel {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  min-width: 0;
}

.viz .playback-panel {
  margin-top: 1rem;
}

.pattern-panel .share-panel {
  margin-top: 1rem;
  padding: 0;
  padding-top: 0.85rem;
  background: transparent;
  border: none;
  border-top: 1px solid var(--border);
  border-radius: 0;
  min-width: 0;
}

.pattern-panel .share-panel .share-panel-title {
  text-align: start;
}

.playback-panel-trigger {
  display: block;
  box-sizing: border-box;
  width: 100%;
  padding-block: 0.95rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
}

.btn-template {
  font-size: 0.875rem;
  padding: 0.4rem 0.7rem;
}

.transport {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin: 0;
}

.pattern-panel .transport {
  margin-top: 1rem;
  margin-bottom: 0;
}

.segments-head {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

.segments-head h2 {
  margin: 0;
  font-size: 1rem;
}

.btn {
  font: inherit;
  cursor: pointer;
  padding: 0.5rem 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  touch-action: manipulation;
  transition:
    transform 160ms ease-out,
    border-color 160ms ease-out,
    background-color 160ms ease-out,
    filter 160ms ease-out;
}

.btn:disabled,
.icon-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.btn:not(:disabled):active,
.icon-btn:not(:disabled):active {
  transform: scale(0.98);
}

.btn:hover:not(:disabled) {
  filter: brightness(1.06);
}

.btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.btn-copy-link {
  /* Steady width across Copy link / Copying… / Copied! */
  min-width: 12ch;
}

.btn.primary {
  background: linear-gradient(
    165deg,
    color-mix(in srgb, var(--phase-out), transparent 82%),
    var(--surface)
  );
  border-color: color-mix(in srgb, var(--phase-out), var(--border) 60%);
}

.btn.small {
  padding: 0.35rem 0.65rem;
  font-size: 0.875rem;
}

.segment-list {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.segment-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem;
  align-items: center;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
}

@media (max-width: 479px) {
  .segment-row-moves {
    justify-content: flex-end;
  }

  .segment-row-reorder {
    flex-direction: row;
    align-items: center;
    gap: 0.35rem;
  }
}

.segment-row-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  min-width: 0;
}

.segment-row-fields label span {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.segment-row-fields label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Phase + seconds on first flex strip; Cues + optional label reorder via flex `order`. */
.segment-row-fields > label:has(.segment-kind),
.segment-row-fields > label:has(.segment-duration) {
  order: 0;
}

/* `<details>` uses display:contents so summary + expanded inner participate in `.segment-row-fields` flex layout. */
.segment-row-fields > .segment-cues-shell {
  display: contents;
}

.segment-row-fields > .segment-cues-summary {
  order: 2;
  flex-shrink: 0;
  width: auto;
  align-self: center;
  padding-inline-start: 0.5rem;
  margin-inline-start: 0;
  border-inline-start: 1px solid var(--border);
}

.segment-row-fields > .segment-label-wrap {
  order: 3;
  flex: 1 1 12rem;
  min-width: 0;
  flex-direction: column;
  align-items: stretch;
  gap: 0.25rem;
}

.segment-row-fields > .segment-label-wrap .segment-label {
  width: 100%;
  min-width: 0;
}

.segment-row-fields > .segment-cues-inner {
  order: 10;
  flex-basis: 100%;
  width: 100%;
  padding-top: 0.15rem;
}

.segment-row-fields details[open] > .segment-cues-summary {
  margin-bottom: 0;
}

.segment-cues-inner {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding-bottom: 0.15rem;
}

/* Requires :has() (Baseline ~2024). When cue is none, hides redundant None radio; clearing returns after choosing in/out. */
.segment-cues-inner label:has(input[type="radio"][value="none"]:checked) {
  display: none;
}

.segment-cues-inner .segment-nasal-fieldset,
.segment-cues-inner .segment-mouth-fieldset,
.segment-cues-inner .segment-chest-fieldset,
.segment-cues-inner .segment-stomach-fieldset {
  flex-basis: 100%;
  margin: 0;
  padding: 0.35rem 0 0;
  border: none;
  border-top: 1px solid var(--border);
}

.segment-cues-inner .segment-nasal-fieldset:first-of-type {
  padding-top: 0;
  border-top: none;
}

.segment-cues-inner .segment-nasal-fieldset legend,
.segment-cues-inner .segment-mouth-fieldset legend,
.segment-cues-inner .segment-chest-fieldset legend,
.segment-cues-inner .segment-stomach-fieldset legend {
  float: left;
  width: 100%;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--muted);
  padding: 0;
  margin-bottom: 0.35rem;
}

.segment-cues-summary {
  display: flex;
  align-items: center;
  list-style: none;
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--muted);
  padding: 0;
  margin: 0;
  user-select: none;
}

.segment-cues-summary::-webkit-details-marker {
  display: none;
}

.segment-cues-summary::before {
  content: '';
  flex-shrink: 0;
  width: 0.35em;
  height: 0.35em;
  margin-inline-end: 0.45rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-0.05em) rotate(-45deg);
  transition: transform 0.15s ease;
}

details[open] > .segment-cues-summary::before {
  transform: translateY(0.08em) rotate(45deg);
}

details[open] > .segment-cues-summary {
  color: var(--text);
}

@media (prefers-reduced-motion: reduce) {
  .segment-cues-summary::before {
    transition: none;
  }

  .templates-summary::after {
    transition: none;
  }
}

.segment-nasal-radios,
.segment-mouth-radios,
.segment-chest-radios,
.segment-stomach-radios {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
  width: 100%;
  clear: both;
}

.segment-nasal-radios label,
.segment-mouth-radios label,
.segment-chest-radios label,
.segment-stomach-radios label {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.875rem;
  cursor: pointer;
}

.segment-kind,
.segment-duration {
  font: inherit;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  box-sizing: border-box;
}

.segment-kind {
  min-width: 0;
  width: max-content;
  max-width: 100%;
  field-sizing: content;
}

.segment-duration {
  min-width: 4rem;
  width: 4rem;
}

/* ~375px phones: denser Pattern card */
@media (max-width: 420px) {
  .pattern-panel {
    padding: 0.65rem 0.6rem;
    border-radius: 12px;
  }

  .pattern-panel .transport {
    flex-direction: column;
    align-items: stretch;
    gap: 0.4rem;
  }

  .pattern-panel .btn-copy-link {
    min-width: 0;
    width: 100%;
  }

  .segments-head {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .segment-row {
    padding: 0.4rem;
    gap: 0.35rem;
  }

  /* Same compact horizontal strip as wider viewports; flex-wrap spills when needed. */
  .segment-row-fields > .segment-label-wrap {
    flex: 1 1 8rem;
    min-width: 0;
  }
}

.segment-label {
  box-sizing: border-box;
  font: inherit;
  line-height: 1.35;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  min-width: 0;
  flex: 1 1 10rem;
  max-width: 100%;
  max-height: calc(2 * 0.35rem + 1.35em);
}

.segment-row-moves {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.35rem;
  align-items: center;
  justify-self: end;
}

.segment-row-reorder {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.22rem;
}

.segment-row-reorder > .icon-btn {
  min-width: 2.25rem;
  box-sizing: border-box;
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 0.2rem 0.35rem;
  border-radius: 6px;
}

.segment-row-reorder > .icon-btn:hover:not(:disabled) {
  filter: none;
  color: var(--text);
  background: color-mix(in srgb, var(--border) 35%, transparent);
}

.icon-btn {
  font: inherit;
  cursor: pointer;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  touch-action: manipulation;
  transition:
    transform 160ms ease-out,
    border-color 160ms ease-out,
    background-color 160ms ease-out,
    filter 160ms ease-out;
}

.icon-btn:hover:not(:disabled) {
  filter: brightness(1.06);
}

.icon-btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.icon-btn.rm {
  border: none;
  background: transparent;
  color: var(--danger);
  padding: 0.2rem 0.45rem;
  border-radius: 6px;
}

.icon-btn.rm:hover:not(:disabled) {
  filter: none;
  background: color-mix(in srgb, var(--danger) 18%, transparent);
  color: var(--danger);
}

/* Cycle starts at top; marker moves clockwise — same convention as arcs in JS. */
@media (prefers-reduced-motion: reduce) {
  .viz-dot-marker {
    visibility: hidden;
  }

  .viz.viz-playing .viz-dot-core {
    animation: none;
  }

  .btn,
  .icon-btn {
    transition-duration: 0.01ms;
  }

  .btn:not(:disabled):active,
  .icon-btn:not(:disabled):active {
    transform: none;
  }

  button {
    scroll-behavior: auto;
  }
}