:where(body.tk[data-tool="interval"]) .interval-controls {
  display: grid;
  gap: 18px;
}

:where(body.tk[data-tool="interval"]) #intervalIntro{
  display: grid;
  gap: 8px;
}

:where(body.tk[data-tool="interval"]) #intervalIntro .hint-label{
  font-weight: 600;
  margin: 4px 0 0;
}

:where(body.tk[data-tool="interval"]) #intervalIntro .hint-list{
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 4px;
  list-style: disc;
  grid-template-columns: 1fr;
}

@media (min-width: 700px){
  :where(body.tk[data-tool="interval"]) #intervalIntro .hint-list{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

:where(body.tk[data-tool="interval"]) #intervalIntro .hint-note{
  font-size: 13px;
  color: var(--muted);
}

:where(body.tk[data-tool="interval"][data-mode="run"]) .setup-only{
  display: none !important;
}

:where(body.tk[data-tool="interval"]) #editSettingsBtn{
  display: none;
  margin-top: 6px;
  padding: 6px 14px;
  font-size: 13px;
  border: 1px dashed rgba(91, 42, 166, 0.35);
  background: rgba(255,255,255,0.75);
  color: var(--text);
  width: max-content;
}

:where(body.tk[data-tool="interval"][data-mode="run"]) #editSettingsBtn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

:where(body.tk[data-tool="interval"]) [hidden]{
  display: none !important;
}

:where(body.tk[data-tool="interval"]) .interval-cards{
  display: grid;
  gap: 16px;
}

:where(body.tk[data-tool="interval"]) .control-card{
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(255,255,255,0.9);
  padding: 18px;
  display: grid;
  gap: 12px;
}

:where(body.tk[data-tool="interval"]) .control-card h2,
:where(body.tk[data-tool="interval"]) .control-card summary{
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

:where(body.tk[data-tool="interval"]) .timing-field{
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  display: grid;
  gap: 10px;
  background: rgba(255,255,255,0.4);
}

:where(body.tk[data-tool="interval"]) .timing-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

:where(body.tk[data-tool="interval"]) .settings-row{
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}

:where(body.tk[data-tool="interval"]) .settings-text{
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

:where(body.tk[data-tool="interval"]) .settings-text label{
  display: block;
}

:where(body.tk[data-tool="interval"]) .settings-input{
  display: flex;
  justify-content: flex-end;
  min-width: 120px;
}

:where(body.tk[data-tool="interval"]) .settings-input input{
  width: 140px;
  max-width: 180px;
}

:where(body.tk[data-tool="interval"]) .interval-length-tile{
  display: flex;
  flex-direction: column;
  gap: 10px;
}

:where(body.tk[data-tool="interval"]) .interval-length-meta{
  display: flex;
  flex-direction: column;
  gap: 4px;
}

:where(body.tk[data-tool="interval"]) .interval-unit-toggle{
  display: inline-flex;
  gap: 8px;
  margin-top: 4px;
  background: rgba(91, 42, 166, 0.08);
  padding: 4px;
  border-radius: 999px;
}

:where(body.tk[data-tool="interval"]) .interval-unit-toggle label{
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  padding: 4px 8px;
  border-radius: 999px;
  cursor: pointer;
}

:where(body.tk[data-tool="interval"]) .interval-unit-toggle input{
  accent-color: var(--accent);
}

:where(body.tk[data-tool="interval"]) .interval-unit-toggle input:checked + span{
  font-weight: 600;
}

:where(body.tk[data-tool="interval"]) .interval-length-meta .field-title{
  font-weight: 600;
}

:where(body.tk[data-tool="interval"]) .interval-length-input input{
  width: 140px;
  max-width: 200px;
}

:where(body.tk[data-tool="interval"]) .interval-length-tile .interval-length-input{
  display: flex;
  justify-content: flex-start;
}

:where(body.tk[data-tool="interval"]) .interval-length-tile .interval-length-input input{
  width: 100%;
  max-width: 220px;
}

:where(body.tk[data-tool="interval"]) .toggle-row{
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
  background: rgba(255,255,255,0.55);
}

:where(body.tk[data-tool="interval"]) .toggle-text{
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1 1 auto;
  min-width: 0;
}

:where(body.tk[data-tool="interval"]) .toggle-row .switch{
  margin-left: auto;
}

:where(body.tk[data-tool="interval"]) .toggle-row .switch input,
:where(body.tk[data-tool="interval"]) .sound-row .switch input{
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  cursor: pointer;
}

:where(body.tk[data-tool="interval"]) .field-head{
  display: grid;
  gap: 2px;
}

:where(body.tk[data-tool="interval"]) .field-title{
  font-weight: 600;
}

:where(body.tk[data-tool="interval"]) .field-hint,
:where(body.tk[data-tool="interval"]) .field-note{
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

:where(body.tk[data-tool="interval"]) .timing-nested{
  display: grid;
  gap: 4px;
}

:where(body.tk[data-tool="interval"]) .sound-card summary{
  cursor: pointer;
}

:where(body.tk[data-tool="interval"]) .sound-grid{
  display: grid;
  gap: 12px;
  margin-top: 6px;
}

:where(body.tk[data-tool="interval"]) .sound-row{
  display: grid;
  gap: 4px;
}

:where(body.tk[data-tool="interval"]) .sound-row-head{
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}

:where(body.tk[data-tool="interval"]) .sound-control{
  display: flex;
  gap: 8px;
  align-items: center;
}

:where(body.tk[data-tool="interval"]) .sound-control select{
  flex: 1;
  min-width: 0;
}

:where(body.tk[data-tool="interval"]) .sound-test{
  width: 42px;
  height: 42px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
}

:where(body.tk[data-tool="interval"]) .volume-row input[type="range"]{
  width: 100%;
}

:where(body.tk[data-tool="interval"]) .action-bar{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

:where(body.tk[data-tool="interval"]) .action-bar .btn.primary{
  background: var(--accent);
  border: 1px solid rgba(91, 42, 166, 0.45);
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.02em;
}

:where(body.tk[data-tool="interval"]) .action-bar .btn.primary:hover{
  background: #6b36c4;
}

:where(body.tk[data-tool="interval"]) .action-bar .btn.primary:focus-visible{
  outline: 2px solid rgba(255,255,255,0.6);
  outline-offset: 2px;
}

:where(body.tk[data-tool="interval"]) .status-card{
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(255,255,255,0.85);
  padding: 18px;
  display: grid;
  gap: 12px;
}

:where(body.tk[data-tool="interval"]) .status-card h2{
  margin: 0;
  font-size: 16px;
}

:where(body.tk[data-tool="interval"]) .status-grid{
  display: grid;
  gap: 10px;
}

:where(body.tk[data-tool="interval"]) .status-row{
  display: grid;
  grid-template-columns: minmax(120px, 1fr) minmax(140px, 1fr);
  gap: 12px;
  align-items: center;
}

:where(body.tk[data-tool="interval"]) .status-row dt{
  margin: 0;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted-2);
}

:where(body.tk[data-tool="interval"]) .status-row dd{
  margin: 0;
  justify-self: end;
}

:where(body.tk[data-tool="interval"]) .interval-time{
  font-size: clamp(48px, 9vw, 80px);
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

:where(body.tk[data-tool="interval"]) .interval-note{
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  min-height: 16px;
}

:where(body.tk[data-tool="interval"]) .interval-count{
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

:where(body.tk[data-tool="interval"]) .sound-card .hint.small{
  margin-top: 0;
}

:where(body.tk[data-tool="interval"]) .control-card summary::-webkit-details-marker{
  display: none;
}

:where(body.tk[data-tool="interval"]) .control-card summary{
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

:where(body.tk[data-tool="interval"]) .control-card summary::after{
  content: "▾";
  font-size: 16px;
  transition: transform 0.2s ease;
}

:where(body.tk[data-tool="interval"]) details[open].control-card summary::after{
  transform: rotate(180deg);
}

:where(body.tk[data-tool="interval"]) .switch-block.inline{
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

:where(body.tk[data-tool="interval"]) .sr-only{
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

:where(body.tk[data-tool="interval"]) #intervalFlash{
  position: fixed;
  inset: 0;
  background: rgba(220, 38, 38, 0);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s ease, background 0.18s ease;
  z-index: 30;
}

:where(body.tk[data-tool="interval"]) #intervalFlash.flash-on{
  opacity: 1;
  background: rgba(220, 38, 38, 0.18);
}

:where(body.tk[data-tool="interval"]) #intervalFlash.flash-on.flash-session{
  background: rgba(239, 68, 68, 0.28);
}

@media (max-width: 720px){
  :where(body.tk[data-tool="interval"]) .settings-row{
    grid-template-columns: 1fr;
    gap: 8px;
  }
  :where(body.tk[data-tool="interval"]) .settings-input{
    justify-content: flex-start;
    min-width: 0;
  }
  :where(body.tk[data-tool="interval"]) .settings-input input{
    width: 100%;
    max-width: none;
  }
  :where(body.tk[data-tool="interval"]) .field-note{
    font-size: 12px;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
  }
}

@media (max-width: 560px){
  :where(body.tk[data-tool="interval"]) .control-card{
    padding: 14px;
  }
  :where(body.tk[data-tool="interval"]) .timing-field{
    padding: 10px;
    gap: 8px;
  }
  :where(body.tk[data-tool="interval"]) .toggle-row{
    padding: 8px 10px;
  }
  :where(body.tk[data-tool="interval"]) .timing-grid{
    gap: 10px;
  }
  :where(body.tk[data-tool="interval"]) .timing-field + .timing-field{
    margin-top: 2px;
  }
}