:root {
  --background-color: #1a1b1e;
  --panel-color: #2a2b2e;
  --text-color: #f0f1f2;
  --text-muted-color: #888a8f;
  --accent-color: #00ffff;
  --accent-hover-color: #8effff;
  --border-color: #3a3b3e;
  --font-family: "Inter", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background-color: var(--background-color);
}

body {
  font-family: var(--font-family);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  padding: 2rem;
  font-size: 14px;
}
.main-content {
}

#root {
  width: 100%;
  max-width: 1200px;
}

#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.app-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  width: 100%;
}

header {
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 0.25rem;
}

header h1 span {
  color: var(--accent-color);
}

header p {
  font-size: 1rem;
  color: var(--text-muted-color);
}

.main-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 992px) {
  .main-content {
    flex-direction: row;
    align-items: flex-start;
  }
}

.visualizer-panel,
.sequencer-panel {
    background-color: var(--panel-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.visualizer-panel {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.5rem;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.panel-header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-color);
  text-transform: uppercase;
  margin: 0;
}

.visualizer-toggle {
  display: flex;
  background-color: var(--background-color);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.visualizer-toggle button {
  background-color: transparent;
  border: none;
  border-radius: 0;
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-muted-color);
  transition: background-color 0.2s, color 0.2s;
}

.visualizer-toggle button:hover:not(.active) {
  background-color: #3a3b3e;
  color: var(--text-color);
}

.visualizer-toggle button:first-child {
  border-right: 1px solid var(--border-color);
}

.visualizer-toggle button.active {
  background-color: var(--accent-color);
  color: var(--background-color);
  font-weight: 600;
}

.visualizer-panel > canvas {
  width: 100%;
  height: 100px;
  display: block;
  background-color: var(--background-color);
  border-radius: 4px;
}

.static-waveform-container {
    position: relative;
    width: 100%;
    height: 100px;
}

.static-waveform-container canvas {
    width: 100%;
    height: 100%;
    display: block;
    background-color: var(--background-color);
    border-radius: 4px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.waveform-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid rgba(0, 255, 255, 0.3);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin .8s linear infinite;
    z-index: 1;
}


.controls-panel {
  flex: 3;
  background-color: var(--panel-color);
  border-radius: 8px;
  padding: 1.5rem 1.5rem 3rem;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.top-controls,
.bottom-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.bottom-controls {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}


.control-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.control-group h3,
.sequencer-panel h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-color);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
  text-transform:uppercase;
}

.control-group h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: #ffffff;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px dashed var(--border-color);
}

.first-sub-headline {
  margin-top: 0;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: opacity 0.3s ease;
}

.control.disabled {
  opacity: 0.4;
  pointer-events: none;
}

.control label {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--text-muted-color);
  font-weight: 400;
}

.control .value {
  color: var(--text-color);
  font-weight: 600;
}

select,
button {
  font-family: var(--font-family);
  font-size: 0.875rem;
  padding: 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: #3a3b3e;
  color: var(--text-color);
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, opacity 0.2s;
}

select:focus,
button:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

select {
  padding: 0.5rem 0.75rem;
  width: 100%;
}

button {
  background-color: var(--panel-color);
  text-align: center;
}

button:hover:not(:disabled) {
  background-color: #4a4b4e;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.active {
    background-color: var(--accent-color);
    color: var(--background-color);
    border-color: var(--accent-color);
}

button.active:hover:not(:disabled) {
    background-color: var(--accent-hover-color);
}


.actions-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  min-width: 250px;
}

.presets-group,
.master-controls,
.macro-controls {
  background-color: var(--panel-color);
  border-radius: 8px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.presets-group {
    gap: 0;
}


.presets-group h2,
.master-controls h2,
.macro-controls h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  text-transform:uppercase;
}

.preset-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.master-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.master-buttons .play {
    grid-column: 1 / -1;
    background-color: var(--accent-color);
    color: var(--background-color);
    font-weight: 700;
    font-size: 1.25rem;
}

.master-buttons .play:hover:not(:disabled) {
    background-color: var(--accent-hover-color);
}


.master-buttons .undo-redo {
    grid-column: 1 / -1;
    display: flex;
    gap: 0.75rem;
}

.normalize-control {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  background-color: #3a3b3e;
  border-radius: 6px;
}

.normalize-control label {
  font-size: 0.875rem;
  color: var(--text-muted-color);
  cursor: pointer;
  flex-grow: 1;
}

.normalize-control input[type="checkbox"] {
  cursor: pointer;
  accent-color: var(--accent-color);
  width: 1.15em;
  height: 1.15em;
}


.undo-redo button {
    flex: 1;
}

/* Macro Controls */
.knob-group {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
}

.knob-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.knob-label {
    font-size: 0.875rem;
    color: var(--text-muted-color);
    font-weight: 600;
}

.knob-svg {
    border-radius: 50%;
}

.knob-track,
.knob-value-arc {
    fill: none;
    stroke-linecap: round;
}

.knob-track {
    stroke: var(--background-color);
    stroke-width: 12;
}

.knob-value-arc {
    stroke: var(--accent-color);
    stroke-width: 12;
    transition: stroke 0.2s;
}
.knob-container:hover .knob-value-arc {
    stroke: var(--accent-hover-color);
}

.knob-dial {
    stroke: var(--text-color);
    stroke-width: 3;
    stroke-linecap: round;
}

.knob-value-text {
    font-size: 0.875rem;
    color: var(--text-color);
    background-color: #3a3b3e;
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
    margin-top: 0.25rem;
}


/* Tooltip Styles */
.tooltip-container {
  position: relative;
  cursor: help;
  border-bottom: 1px dotted var(--text-muted-color);
}
/* Remove dotted line for knob labels */
.knob-container .tooltip-container {
    border-bottom: none;
}


.tooltip-box {
  position: absolute;
  bottom: 120%; /* Position above the element */
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  width: max-content;
  max-width: 250px;
  white-space: normal;
  z-index: 10;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  text-align: left;
  font-weight: 400;
  pointer-events: none;
}

.tooltip-container:hover .tooltip-box {
  opacity: 1;
  visibility: visible;
}

.tooltip-box::after { /* The little triangle */
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: var(--border-color) transparent transparent transparent;
}
.tooltip-box::before { /* The triangle fill */
    content: "";
    position: absolute;
    top: calc(100% - 1px);
    left: 50%;
    transform: translateX(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: var(--background-color) transparent transparent transparent;
    z-index: 1;
}


/* Custom Slider Styles */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: #3a3b3e;
  border-radius: 3px;
  cursor: pointer;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent-color);
  border-radius: 50%;
  border: 3px solid var(--panel-color);
  transition: background-color 0.2s;
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent-color);
  border-radius: 50%;
  border: 3px solid var(--panel-color);
  transition: background-color 0.2s;
}

input[type="range"]:hover::-webkit-slider-thumb,
input[type="range"]:focus::-webkit-slider-thumb {
    background: var(--accent-hover-color);
}

input[type="range"]:hover::-moz-range-thumb,
input[type="range"]:focus::-moz-range-thumb {
    background: var(--accent-hover-color);
}

/* Waveform Selector */
.waveform-selector {
  display: flex;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border-color);
      zoom: .75;
}

.waveform-selector .tooltip-container {
    border-bottom: none;
    flex: 1;
    display: flex;
}

.waveform-selector button {
  flex: 1;
  background-color: #3a3b3e;
  border: none;
  border-radius: 0;
  padding: 0.5rem;
  line-height: 0; /* To center SVG */
  border-right: 1px solid var(--border-color);
}

.waveform-selector .tooltip-container:last-child button {
    border-right: none;
}

.waveform-selector button:hover:not(.active) {
  background-color: #4a4b4e;
}

.waveform-selector button.active {
  background-color: var(--accent-color);
}

.waveform-selector button svg {
  width: 24px;
  height: 24px;
}

.waveform-selector button.active svg path {
  stroke: var(--background-color);
}

.waveform-selector button svg path {
  stroke: var(--text-color);
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Tooltip helpers for flex/grid parents */
.preset-buttons .tooltip-container {
    border-bottom: none;
    display: flex;
}
.preset-buttons .tooltip-container button {
    width: 100%;
}


/* Effects Panel Layout */
.effects-grid {
  display: grid;
  gap: 1.5rem;
}

.effects-column {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Sequencer Styles */
.sequencer-panel {
    transition: opacity 0.3s ease;
}
.sequencer-panel.disabled {
    opacity: 0.4;
    pointer-events: none;
}

.sequencer-content {
  display: flex;
  gap: 2rem;
  align-items: flex-end;
}

.sequencer-main-controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 200px;
}

.sequencer-steps-container {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 1rem;
    flex-grow: 1;
}

.step-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.step-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #1a1b1e;
  border: 1px solid #3a3b3e;
  transition: all 0.1s ease;
  margin-bottom: 0.5rem;
}
.step-indicator.active {
  background-color: var(--accent-color);
  box-shadow: 0 0 8px var(--accent-color);
  border-color: var(--accent-hover-color);
}

.step-control label {
    font-size: 0.75rem;
    color: var(--text-muted-color);
}

.step-control .value {
    font-size: 0.875rem;
    color: var(--text-color);
    background-color: #3a3b3e;
    width: 100%;
    text-align: center;
    padding: 0.25rem 0;
    border-radius: 4px;
    margin-top: 0.25rem;
}

.vertical-slider-track {
    position: relative;
    width: 8px;
    height: 90px;
    background-color: #3a3b3e;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.vertical-slider-thumb {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 12px;
    background-color: var(--accent-color);
    border-radius: 3px;
    border: 2px solid var(--panel-color);
    box-shadow: 0 0 5px rgba(0,0,0,0.5);
    margin-bottom: -6px; /* center it on the value */
    transition: background-color 0.2s;
    pointer-events: none;
}
.controls-panel-wrap {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-width: 250px;
    flex: 3;
}
.vertical-slider-track:hover .vertical-slider-thumb {
    background-color: var(--accent-hover-color);
}

.vertical-slider-track.dragging .vertical-slider-thumb {
     background-color: var(--accent-hover-color);
}

.step-control .vertical-slider-track.disabled {
    cursor: not-allowed;
    opacity: 0.4;
}

/* Envelope Visualizer */
.envelope-visualizer {
  height: 60px;
  background-color: var(--background-color);
  border-radius: 6px;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
  padding: 4px;
}

.envelope-visualizer svg {
  width: 100%;
  height: 100%;
}

.envelope-path {
  fill: rgba(0, 255, 255, 0.2);
  stroke: var(--accent-color);
  stroke-width: 2px;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.grid-line {
  stroke: var(--border-color);
  stroke-width: 1px;
  stroke-dasharray: 2 2;
}

.label {
  fill: var(--text-muted-color);
  font-size: 10px;
  text-anchor: middle;
  font-family: var(--font-family);
}

/* Filter Visualizer */
.filter-visualizer {
    height: 60px;
    background-color: var(--background-color);
    border-radius: 6px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    padding: 4px;
}

.filter-visualizer svg {
    width: 100%;
    height: 100%;
}

.filter-area {
    fill: rgba(0, 255, 255, 0.2);
    stroke: none;
}

.filter-line {
    fill: none;
    stroke: var(--accent-color);
    stroke-width: 2px;
}

.grid-line-zero-db {
    stroke: var(--border-color);
    stroke-width: 1.5px;
}


/* Accordion Styles */
.accordion {
  border-bottom: 1px solid var(--border-color);
}
.accordion:last-child {
  border-bottom: none;
}

.accordion-title-wrapper { 
    margin: 0;
    font-size: inherit;
    font-weight: inherit;
    border: none;
    padding: 0;
}

.accordion-header {
  width: 100%;
  background: none;
  border: none;
  padding: 0.75rem 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted-color);
  cursor: pointer;
  transition: color 0.2s ease;
}
.accordion-content .preset-buttons {
    margin-top: 5px;
}
.accordion-header:hover {
  background-color: transparent;
  color: var(--text-color);
}

.accordion-header .accordion-icon {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.3s ease;
  margin-right: 8px;
}

.accordion-header[aria-expanded="true"] .accordion-icon {
  transform: rotate(-135deg);
  margin-top: -6px; /* Adjust position after rotation */
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  padding: 0 0.5rem;
}

.accordion-content.open {
  max-height: 500px; /* Should be larger than the content will ever be */
  transition: max-height 0.4s ease-in, padding 0.4s ease-in;
  padding: 0 0.5rem 1.25rem;
}

/* Modulation Indicator */
.label-and-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

@keyframes pulse-indicator {
  0%, 100% {
    transform: scale(1);
    opacity: 0.6;
  }
  50% {
    transform: scale(1.2);
    opacity: 1;
  }
}

.mod-indicator {
    width: 8px;
    height: 8px;
    background-color: var(--accent-color);
    border-radius: 50%;
    animation-name: pulse-indicator;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
    transition: opacity 0.3s ease;
    box-shadow: 0 0 6px var(--accent-color);
}


@media (max-width: 768px) {
    .sequencer-content {
        flex-direction: column;
        align-items: stretch;
    }
    .sequencer-steps-container {
        gap: 0.75rem;
    }
}


@media (min-width: 992px) {
  .effects-group {
    grid-column: span 2;
  }
  .effects-grid {
    grid-template-columns: 1fr 1fr;
  }
}

footer {
  text-align: center;
  padding: 1.5rem 0 2rem;
  color: var(--text-muted-color);
  font-size: 0.875rem;
}

footer a {
  color: var(--text-muted-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

footer a:hover {
  color: var(--accent-color);
  text-decoration: underline;
}