:root {
  --ui-bg: #f7f7fb;
  --ui-surface: #ffffff;
  --ui-ink: #111318;
  --ui-muted: #5c6475;
  --ui-line: #111318;
  --ui-accent: #22d3ee;
  --ui-accent-strong: #ff3b3b;
  --ui-accent-soft: #e6f7ff;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--ui-bg);
  color: var(--ui-ink);
  margin: 0;
  padding: 0;
}

header {
  background: var(--ui-surface);
  color: var(--ui-ink);
  padding: 0.75rem 1.25rem;
  width: 100%;
  box-sizing: border-box;
  border-bottom: 2px solid var(--ui-line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
}

header h1 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: 0.08rem;
  text-transform: uppercase;
}

nav {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
  flex-wrap: wrap;
  max-width: 100%;
  box-sizing: border-box;
}

nav li {
  cursor: pointer;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 2px solid var(--ui-line);
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  white-space: nowrap;
  font-size: 0.9rem;
  color: var(--ui-ink);
  background: var(--ui-surface);
}

nav li:hover, nav li.active {
  background: var(--ui-ink);
  color: #fff;
  box-shadow: 0 0 0 2px var(--ui-accent);
}

main {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}

.panel {
  background: var(--ui-surface);
  border-radius: 14px;
  border: 2px solid var(--ui-line);
  box-shadow: 6px 6px 0 rgba(17,19,24,0.08);
  padding: 1.5rem 1rem;
  min-width: 300px;
  flex: 1 1 350px;
  max-width: 500px;
  margin-bottom: 1.5rem;
}

.panel h2 {
  margin-top: 0;
  font-size: 1.3rem;
  color: var(--ui-ink);
}

button {
  font-size: 1rem;
  border-radius: 4px;
  border: 2px solid var(--ui-line);
  margin: 0.2rem 0.3rem 0.2rem 0;
  padding: 0.5rem 1rem;
  background: var(--ui-surface);
  color: var(--ui-ink);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

button:hover {
  background: var(--ui-accent-soft);
}

button:active {
  background: var(--ui-accent-soft);
}

button:focus-visible {
  outline: 2px solid var(--ui-accent);
  outline-offset: 2px;
}

button.active {
  background: var(--ui-ink);
  color: #fff;
}

.pitch-mode-btn {
  font-size: 0.9rem;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  border: 2px solid var(--ui-line);
  background: var(--ui-surface);
  color: var(--ui-ink);
  cursor: pointer;
  transition: all 0.2s;
}

.pitch-mode-btn:hover {
  background: var(--ui-accent-soft);
}

.pitch-mode-btn.active {
  background: var(--ui-ink);
  color: #fff;
  border-color: var(--ui-ink);
}

/* Effects panel button styles */
.distortion-mode-btn, .filter-btn, .reverb-length-btn {
  font-size: 0.9rem;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  border: 2px solid var(--ui-line);
  background: var(--ui-surface);
  color: var(--ui-ink);
  cursor: pointer;
  transition: all 0.2s;
}

.distortion-mode-btn:hover, .filter-btn:hover, .reverb-length-btn:hover {
  background: var(--ui-accent-soft);
}

.distortion-mode-btn.active, .filter-btn.active, .reverb-length-btn.active {
  background: var(--ui-ink);
  color: #fff;
  border-color: var(--ui-ink);
}

input[type="range"] {
  width: 120px;
  vertical-align: middle;
  accent-color: var(--ui-accent);
  background: transparent;
  padding: 0;
  margin: 0;
  touch-action: none;
}

#sound-slots, #soundpanel {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
  flex-wrap: wrap;
  justify-content: center;
}

/* Import panel sound slots list */
#sound-slots-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 1rem 0;
}

.sound-slot-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem;
  background: #f8f9fa;
  border: 2px solid #e9ecef;
  border-radius: 8px;
  transition: all 0.2s ease;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.sound-slot-item:hover {
  border-color: #eebbc3;
  background: #fff;
}

.sound-slot-item.has-file {
  border-color: #4CAF50;
  background: #f1f8e9;
}

.sound-slot-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  min-width: 0;
}

.sound-slot-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #232946;
  color: #eebbc3;
  font-weight: bold;
  font-size: 0.9rem;
  flex-shrink: 0;
  z-index: 1;
}
.slot-volume-slider {
  flex: 1 1 140px;
  min-width: 140px;
  margin: 0 0.5rem;
}


.sound-slot-name {
  font-size: 0.95rem;
  color: #333;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.sound-slot-name.has-file {
  color: #2e7d32;
  font-weight: 500;
}

.import-sound-btn {
  background: var(--ui-surface);
  color: var(--ui-ink);
  border: 2px solid var(--ui-line);
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s;
  flex-shrink: 0;
}

.import-sound-btn:hover {
  background: var(--ui-accent-soft);
}

.import-sound-btn.has-file {
  background: #4CAF50;
  color: white;
}

.import-sound-btn.has-file:hover {
  background: #45a049;
}

.export-sound-btn {
  background: var(--ui-surface);
  color: var(--ui-ink);
  border: 2px solid var(--ui-line);
  padding: 0.5rem 0.75rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.2s;
  flex-shrink: 0;
}

.export-sound-btn:hover {
  background: var(--ui-accent-soft);
}

/* Channel strips with volume sliders and meters */
#channel-strips {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 1rem;
  background: #1a1a2e;
  border-radius: 8px;
}

.channel-strip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem;
  background: #232946;
  border-radius: 4px;
  min-width: 40px;
}

.channel-meter {
  width: 12px;
  height: 80px;
  background: #111;
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

.meter-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 0%;
  background: linear-gradient(to top, #00ff00 0%, #00ff00 60%, #ffff00 80%, #ff0000 100%);
  transition: height 0.05s ease-out;
}

.channel-strip .slot-volume-slider {
  writing-mode: vertical-lr;
  direction: rtl;
  width: 12px;
  height: 90px;
  margin: 0;
  cursor: pointer;
  -webkit-appearance: slider-vertical;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
}

.channel-strip .slot-volume-slider::-webkit-slider-runnable-track {
  width: 12px;
  height: 90px;
  background: #444;
  border-radius: 6px;
}

.channel-strip .slot-volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 10px;
  background: #eebbc3;
  border-radius: 4px;
  cursor: pointer;
  margin-top: -2px;
}

.channel-strip .slot-volume-slider::-moz-range-track {
  width: 12px;
  height: 90px;
  background: #444;
  border-radius: 6px;
}

.channel-strip .slot-volume-slider::-moz-range-thumb {
  width: 12px;
  height: 10px;
  background: #eebbc3;
  border-radius: 4px;
  cursor: pointer;
  border: none;
}

.channel-label {
  font-size: 0.75rem;
  font-weight: bold;
  color: #eebbc3;
}

/* Color-code the channel labels to match sound slots */
.channel-strip[data-slot="1"] .channel-label { color: #fc011c; }
.channel-strip[data-slot="2"] .channel-label { color: #fd9210; }
.channel-strip[data-slot="3"] .channel-label { color: #ffff0a; }
.channel-strip[data-slot="4"] .channel-label { color: #996633; }
.channel-strip[data-slot="5"] .channel-label { color: #df24ff; }
.channel-strip[data-slot="6"] .channel-label { color: #0099ff; }
.channel-strip[data-slot="7"] .channel-label { color: #00ff00; }
.channel-strip[data-slot="8"] .channel-label { color: #ff99cc; }

.sound-slot, .sound-rect {
  width: 38px;
  height: 38px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: #fff;
  margin: 0.2rem;
  box-shadow: 0 1px 3px rgba(30,40,90,0.08);
  cursor: pointer;
  border: 2px solid #fff;
  transition: border 0.2s, box-shadow 0.2s;
}

.sound-slot[data-slot="1"], .sound-rect[data-slot="1"] { background: #fc011c; }
.sound-slot[data-slot="2"], .sound-rect[data-slot="2"] { background: #fd9210; }
.sound-slot[data-slot="3"], .sound-rect[data-slot="3"] { background: #ffff0a; color: #232946; }
.sound-slot[data-slot="4"], .sound-rect[data-slot="4"] { background: #996633; }
.sound-slot[data-slot="5"], .sound-rect[data-slot="5"] { background: #df24ff; }
.sound-slot[data-slot="6"], .sound-rect[data-slot="6"] { background: #20fff7; color: #232946; }
.sound-slot[data-slot="7"], .sound-rect[data-slot="7"] { background: #00cf03; }
.sound-slot[data-slot="8"], .sound-rect[data-slot="8"] { background: #0004fe; }

.sound-slot.selected, .sound-rect.selected {
  border: 2px solid #232946;
  box-shadow: 0 0 0 3px #eebbc3;
}

#quick-load-buttons {
  margin: 0.5rem 0 1rem 0;
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

#perform-panel {
  width: 100%;
  max-width: 800px;
  min-width: 0;
  margin-left: auto;
  margin-right: auto;
  display: block;
  background: var(--ui-surface);
  box-shadow: 6px 6px 0 rgba(17,19,24,0.08);
  border-radius: 0;
  padding: 2.5rem 1.5rem 2.5rem 1.5rem;
  box-sizing: border-box;
  overflow-x: hidden;
}

#perform-panel h2 {
  margin-bottom: 1.2rem;
  z-index: 1;
}

#waveform-container {
  width: 100%;
  max-width: 1000px;
  height: 480px;
  background: #232946;
  margin: 2rem auto 4rem auto;
  display: block;
  position: relative;
  box-sizing: border-box;
}

#waveform-container canvas,
#waveform-container img {
  width: 100% !important;
  height: 100% !important;
  display: block;
  border-radius: 0;
}

#soundpanel {
  width: 100%;
  max-width: 1000px;
  display: grid !important;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 1.2rem;
  margin: 2.5rem auto 2rem auto;
  justify-items: center;
  align-items: center;
}

.sound-rect {
  width: 100%;
  min-width: 0;
  height: 60px;
  min-height: 40px;
  border-radius: 8px;
  font-size: 1.2rem;
  margin: 0;
  border: 3px solid #fff;
  box-shadow: 0 2px 6px rgba(30,40,90,0.15);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

#envelope-panel {
  margin: 1rem 0;
}

#envelope-modes .envelope-mode {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  justify-content: flex-start;
  text-align: left;
}

.envelope-icon {
  width: 36px;
  height: 18px;
  flex-shrink: 0;
}

#envelope-shapes {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

#assign-recording, #random-modes, #sound-excluder {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 0.5rem 0;
  justify-content: center;
}

.button-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: space-between;
  width: 100%;
  margin-right: -0.5rem;
  margin-bottom: -0.5rem;
}

.button-row-left {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: flex-start;
  width: 100%;
  margin-right: -0.5rem;
  margin-bottom: -0.5rem;
}

.button-row > *, .button-row-left > * {
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

@supports (gap: 0.5rem) {
  .button-row,
  .button-row-left {
    margin-right: 0;
    margin-bottom: 0;
  }

  .button-row > *,
  .button-row-left > * {
    margin: 0;
  }
}

#backing-track button {
  flex: 1 1 90px;
  min-width: 90px;
  max-width: 140px;
}

#backing-track > div {
  flex-wrap: wrap;
}

#pitch-control, #volume-control, #backing-track-controls, #trigger-panel, #effects-panel {
  margin: 0.5rem 0;
}

@media (max-width: 900px) {
  main {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }
  .panel {
    max-width: 100%;
    min-width: 0;
  }
}

@media (max-width: 600px) {
  header h1 {
    font-size: 1.2rem;
  }
  nav ul {
    gap: 0.3rem;
    padding: 0 0.5rem;
  }
  nav li {
    padding: 0.25rem 0.4rem;
    font-size: 0.8rem;
  }
  .panel {
    padding: 1rem 0.5rem;
  }
  #sound-slots, #soundpanel {
    gap: 0.2rem;
  }
  .sound-slot, .sound-rect {
    width: 28px;
    height: 28px;
    font-size: 0.9rem;
  }
}

.drop-area {
  border: 2px dashed var(--ui-line);
  border-radius: 12px;
  background: var(--ui-surface);
  color: var(--ui-ink);
  padding: 1.2em 0.5em;
  margin: 1em 0 1.5em 0;
  text-align: center;
  font-size: 1.1em;
  transition: background 0.2s, border-color 0.2s;
}
.drop-area.dragover {
  background: var(--ui-accent-soft);
  border-color: var(--ui-accent);
}

#perform-layout {
  display: flex;
  flex-direction: row;
  gap: 2rem;
  width: 100%;
  height: 100%;
}
#perform-layout > div:first-child {
  flex: 2;
  min-width: 350px;
}
#perform-layout > div:last-child {
  flex: 1;
  min-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
#perform-layout .panel {
  margin: 0;
  width: 100%;
  box-sizing: border-box;
}
@media (max-width: 900px) {
  #perform-layout {
    flex-direction: column;
    gap: 1rem;
  }
  #perform-layout > div {
    min-width: 0;
  }
}

/* Recording buttons */
.record-slot-btn {
  font-size: 0.9rem;
  padding: 0.5rem;
  border-radius: 4px;
  background: var(--ui-surface);
  color: var(--ui-ink);
  border: 2px solid var(--ui-line);
  cursor: pointer;
  transition: all 0.2s;
}

.record-slot-btn:hover {
  background: var(--ui-accent-soft);
}

.record-slot-btn.recording {
  background: #ff0000;
  color: white;
  border-color: #ff0000;
  animation: pulse-red 1s infinite;
}

@keyframes pulse-red {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Random mode buttons */
.random-mode-btn {
  font-size: 0.9rem;
  padding: 0.5rem;
  border-radius: 4px;
  border: 2px solid var(--ui-line);
  background: var(--ui-surface);
  color: var(--ui-ink);
  cursor: pointer;
  transition: all 0.2s;
}

.random-mode-btn:hover {
  background: var(--ui-accent-soft);
}

.random-mode-btn.active {
  background: var(--ui-ink);
  color: #fff;
  border-color: var(--ui-ink);
}

/* Sound excluder buttons */
.sound-excluder-btn {
  font-size: 0.9rem;
  padding: 0.5rem;
  border-radius: 4px;
  border: 2px solid var(--ui-line);
  background: var(--ui-surface);
  color: var(--ui-ink);
  cursor: pointer;
  transition: all 0.2s;
}

.sound-excluder-btn:hover {
  background: var(--ui-accent-soft);
}

.sound-excluder-btn.active {
  background: #4CAF50;
  color: white;
  border-color: #4CAF50;
}

/* Assign performance buttons */
.assign-perf-btn {
  font-size: 0.85rem;
  padding: 0.4rem 0.6rem;
  border: 2px solid var(--ui-line);
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  transition: filter 0.2s;
}

.assign-perf-btn:hover {
  filter: brightness(1.05);
} 

.assign-perf-btn[data-slot="0"] { background: #fc011c; }
.assign-perf-btn[data-slot="1"] { background: #fd9210; }
.assign-perf-btn[data-slot="2"] { background: #ffff0a; color: #232946; }
.assign-perf-btn[data-slot="3"] { background: #996633; }
.assign-perf-btn[data-slot="4"] { background: #df24ff; }
.assign-perf-btn[data-slot="5"] { background: #20fff7; color: #232946; }
.assign-perf-btn[data-slot="6"] { background: #00cf03; }
.assign-perf-btn[data-slot="7"] { background: #0004fe; }

#save-set-buttons button {
  border-radius: 999px;
  border: 2px solid var(--ui-line);
  background: var(--ui-surface);
  color: var(--ui-ink);
  padding: 0.6rem 1rem;
}

#save-set-buttons button:hover {
  background: var(--ui-accent-soft);
}

#save-set-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

#save-set-buttons button {
  flex: 1 1 120px;
  max-width: 160px;
}

#quick-load-buttons {
  flex-wrap: wrap;
}

#quick-load-buttons button {
  flex: 1 1 120px;
  max-width: 160px;
  min-width: 110px;
}