:root {
  --bg: var(--compost-theme-bg);
  --panel: var(--compost-theme-panel);
  --line: var(--compost-theme-line);
  --text: var(--compost-theme-text);
  --muted: var(--compost-theme-muted);
  --accent: var(--compost-theme-accent);
  --danger: var(--compost-theme-danger);
  --control-bg: var(--compost-theme-control-bg);
  --control-border: var(--compost-theme-control-border);
  --active-text: var(--compost-theme-active-text);
  --toolbar-height: 50px;
  --midi-drawer-space: 0px;
  color-scheme: var(--compost-theme-color-scheme);
  font-family: ui-sans-serif, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); }

body[data-midi-map-mode]::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
  border: 3px solid var(--compost-theme-learn);
  box-shadow: inset 0 0 28px color-mix(in srgb, var(--compost-theme-learn) 12%, transparent);
}

button, input, select, textarea { font: inherit; }
h1, h2, p { margin: 0; }
[hidden] { display: none !important; }

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

.app-frame {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto minmax(0, 1fr);
  min-height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

.host-toolbar {
  position: relative;
  z-index: 30;
  grid-column: 1 / -1;
  grid-row: 1;
  display: flex;
  align-items: stretch;
  min-width: 0;
  min-height: var(--toolbar-height);
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}

.host-toolbar > * {
  flex: 0 0 auto;
}

.host-toolbar compost-audio {
  --compost-audio-button-size: calc(var(--toolbar-height) - 1px);
  --compost-audio-button-border: transparent;
  --compost-audio-button-border-width: 0;
  --compost-audio-ring-width: 0;
  --compost-audio-ring-space: 0;
  --compost-audio-focus-bracket-offset: 0px;
  --compost-audio-focus-bracket-pulse-offset: 0px;
  --compost-button-width: calc(var(--toolbar-height) - 1px);
  --compost-button-height: calc(var(--toolbar-height) - 1px);
  height: calc(var(--toolbar-height) - 1px);
  font-size: 20px;
}

.host-toolbar compost-audio[centered-while-off]:not([running]) {
  --compost-audio-button-size: 88px;
  --compost-button-width: 88px;
  --compost-button-height: 88px;
  --compost-audio-button-border: var(--text);
  --compost-audio-button-border-width: 3px;
  --compost-audio-ring-width: 2px;
  --compost-audio-ring-space: 10px;
  --compost-audio-centered-placeholder-height: calc(var(--toolbar-height) - 1px);
}

.host-toolbar compost-audio::part(power-button),
.host-toolbar compost-audio::part(button) {
  --compost-button-focus-bracket-offset: 0px;
  --compost-button-focus-bracket-pulse-offset: 0px;
  --compost-button-focus-bracket-length: 0px;
  --compost-button-focus-bracket-thickness: 0px;
}

#midi-map-toggle,
#effect-controls compost-button {
  --compost-button-width: 82px;
  --compost-button-height: calc(var(--toolbar-height) - 1px);
  --compost-button-ring-space: 0;
  --compost-button-border-width: 0;
  --compost-button-outline-width: 0;
  --compost-button-focus-bracket-offset: 0px;
  --compost-button-focus-bracket-pulse-offset: 0px;
  --compost-button-focus-bracket-length: 0px;
  --compost-button-focus-bracket-thickness: 0px;
  --compost-button-bg: var(--panel);
  --compost-button-gap: var(--panel);
  height: calc(var(--toolbar-height) - 1px);
  border-left: 1px solid var(--line);
  font: inherit;
}

#midi-map-toggle[pressed] {
  --compost-button-fill: color-mix(in srgb, var(--compost-theme-learn) 78%, var(--panel));
}

#midi-map-toggle[pressed]::part(button) {
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--compost-theme-learn) 72%, var(--panel)),
    color-mix(in srgb, var(--compost-theme-learn) 58%, var(--panel))
  );
  animation: midi-map-frame 2.8s ease-in-out infinite;
}

#midi-map-toggle::part(button) { outline: 0; }

#midi-map-toggle:focus-within::part(button) {
  box-shadow: inset 0 0 0 1px var(--accent);
}

@keyframes midi-map-frame {
  0%, 100% {
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 55%, transparent);
  }
  50% {
    box-shadow: inset 0 0 0 2px var(--accent);
  }
}

#effect-controls {
  display: flex;
  align-items: stretch;
}

#effect-controls compost-button {
  --compost-button-width: 58px;
}

.toolbar-button {
  min-width: 58px;
  height: calc(var(--toolbar-height) - 1px);
  padding: 0 12px;
  border: 0;
  border-left: 1px solid var(--line);
  border-radius: 0;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
}

.toolbar-button:hover,
.toolbar-button[data-dragover] {
  background: color-mix(in srgb, var(--panel) 88%, var(--text));
}

.toolbar-button:focus-visible {
  position: relative;
  z-index: 2;
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.toolbar-button[aria-pressed="true"] {
  background: var(--accent);
  color: var(--active-text);
}

.toolbar-select {
  display: flex;
  align-items: center;
  min-width: 0;
  height: calc(var(--toolbar-height) - 1px);
  border-left: 1px solid var(--line);
}

.toolbar-select > span {
  padding-left: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.toolbar-select compost-select {
  width: clamp(130px, 17vw, 230px);
  --compost-select-height: calc(var(--toolbar-height) - 1px);
  --compost-select-popup-offset: 0px;
  --compost-select-bg: var(--panel);
  --compost-select-border: transparent;
  --compost-select-hover-bg: color-mix(in srgb, var(--panel) 88%, var(--text));
}

.toolbar-select compost-select::part(button) {
  border: 0;
  outline-offset: -2px;
}

#cpu {
  flex: 0 0 auto;
  min-width: 90px;
  margin-left: auto;
  padding: 0 10px;
  display: grid;
  place-items: center end;
  color: var(--muted);
  border-left: 1px solid var(--line);
  font: 11px ui-monospace, monospace;
  white-space: nowrap;
}

#plugin-info-panel {
  position: relative;
  z-index: 25;
  grid-column: 1 / -1;
  grid-row: 2;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

#plugin-info-panel h2,
.drawer-section h2,
#parameter-panel h2 {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#plugin-info {
  display: grid;
  grid-template-columns: minmax(90px, max-content) minmax(0, 1fr);
  gap: 5px 16px;
  max-width: 100ch;
  margin: 0;
  font-size: 12px;
}

#plugin-info dt { color: var(--muted); }
#plugin-info dd { margin: 0; overflow-wrap: anywhere; }

.midi-drawer {
  --compost-drawer-size: 420px;
  --compost-drawer-content-padding: 12px;
  --compost-drawer-title-size: var(--toolbar-height);
  --compost-drawer-title-padding: 9px 11px;
  grid-column: 1;
  grid-row: 3;
  align-self: stretch;
  min-width: 0;
  height: 100%;
  z-index: 20;
}

.midi-drawer:not([open]) {
  width: var(--toolbar-height);
}

.midi-drawer-title {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.midi-activity-led {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 7px color-mix(in srgb, var(--accent) 72%, transparent);
  opacity: 0.18;
  transition: opacity 20ms linear;
}

.midi-activity-led.active { opacity: 1; }

.drawer-stack,
.drawer-section {
  display: grid;
  min-width: 0;
}

.drawer-stack { gap: 16px; }
.drawer-section { gap: 9px; }

.drawer-section + .drawer-section {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.drawer-section p {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

compost-midi {
  width: 100%;
  --compost-midi-columns: 1fr;
}

compost-midi-mappings {
  --compost-midi-mappings-table-width: 100%;
}

compost-midi-mappings::part(heading) {
  display: none;
}

main {
  grid-column: 2;
  grid-row: 3;
  min-width: 0;
  min-height: 0;
  padding: 22px;
  display: grid;
  grid-template-rows: minmax(280px, 1fr) auto;
  gap: 18px;
  overflow: auto;
}

iframe {
  width: min(100%, 640px);
  height: 420px;
  max-height: calc(100vh - 220px);
  min-height: 280px;
  aspect-ratio: 640 / 420;
  justify-self: center;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--bg);
}

#parameter-panel {
  width: min(100%, 720px);
  justify-self: center;
  display: grid;
  align-self: start;
  align-content: start;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
}

#parameters {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 116px));
  justify-content: start;
  align-items: start;
  gap: 16px 12px;
}

#parameters compost-knob {
  min-width: 0;
  --knob-scale: 0.78;
}

#status {
  place-self: center;
  max-width: 70ch;
  color: var(--muted);
  text-align: center;
  white-space: pre-wrap;
}

#status[data-error] { color: var(--danger); }

#host-keyboard {
  --compost-piano-height: 112px;
  --compost-piano-dock-offset: calc(var(--midi-drawer-space) / 2);
  --compost-piano-background: var(--panel);
  --piano-natural-background: #d8d8d6;
  --piano-natural-border: #151515;
  --piano-accidental-background: #151515;
  --piano-accidental-border: #151515;
  --piano-active-background: var(--accent);
  --piano-active-border: var(--accent);
  --piano-label: #555;
  --piano-active-label: var(--active-text);
  --compost-piano-color-scheme: dark;
}

body[data-host-keyboard] main { padding-bottom: 140px; }
body[data-host-keyboard] iframe { max-height: calc(100vh - 300px); }

audio,
input[type="file"] { display: none; }

@media (max-width: 900px) {
  .host-toolbar {
    flex-wrap: wrap;
    align-content: start;
    height: auto;
  }

  #cpu { margin-left: 0; }
}

@media (max-width: 600px) {
  .app-frame {
    display: flex;
    flex-direction: column;
    height: auto;
    min-height: 100dvh;
    overflow: visible;
  }

  .host-toolbar {
    order: 1;
    position: sticky;
    top: 0;
  }

  .toolbar-select {
    flex: 1 1 220px;
  }

  .toolbar-select compost-select {
    flex: 1 1 auto;
    width: auto;
  }

  #plugin-info-panel { order: 2; }

  .midi-drawer {
    --compost-drawer-size: min(70dvh, 420px);
    order: 3;
    width: 100%;
    height: auto;
  }

  .midi-drawer:not([open]) { width: 100%; }

  main {
    order: 4;
    width: 100%;
    min-height: calc(100dvh - var(--toolbar-height));
    overflow: visible;
    padding: 14px;
  }

  iframe { max-height: none; }

  #host-keyboard {
    --compost-piano-dock-offset: 0px;
  }
}

@media (prefers-reduced-motion: reduce) {
  #midi-map-toggle[pressed]::part(button) { animation: none; }
}