/* ButtonBass Drum Machine Styles */
@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Outfit:wght@300;400;600;700&display=swap');

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

:root {
  --bg-color: #1e1e24;
  --primary-surface: #2a2a33;
  --secondary-surface: #383844;
  --tertiary-surface: #4a4a58;
  --text-color: #e8e8e8;
  --text-muted-color: #a0a0a8;
  --accent-color: #5a67d8;
  --accent-hover: #4c51bf;
  --highlight-color: #f6e05e;
  --record-color: #e53e3e;
  --record-active-bg: #c53030;
  --mute-color: #718096;
  --mute-active-bg: #4a5568;
  --handle-color: #a0aec0;
  --border-color: #404048;
  --track-bg: #2f2f37;
  --track-header-bg: #25252d;
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --shadow-sm: 0 2px 4px rgba(0,0,0, 0.15);
  --shadow-md: 0 5px 10px rgba(0,0,0, 0.2);
  
  /* Drum machine specific variables */
  --bg: linear-gradient(135deg, #0a0a0f 0%, #151520 50%, #0d0d15 100%);
  --accent: #00ffc8;
  --accent2: #00a8ff;
  --text: #e0e0e0;
  --muted: #666;
  --surface: rgba(0,0,0,0.3);
  --border: rgba(255,255,255,0.1);
  --step-active: linear-gradient(135deg, rgba(0,255,200,0.4) 0%, rgba(0,168,255,0.4) 100%);
  --step-playing: linear-gradient(135deg, #00ffc8 0%, #00a8ff 100%);
  --btn-text: #ffffff;
}

body {
  font-family: var(--font-family);
  min-height: 100vh;
  background: var(--bg);
  background-color: var(--bg-color);
  color: var(--text);
  padding: 0;
  margin: 0;
  font-size: 14px;
}

/* Custom Scrollbar Styles */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--secondary-surface) var(--primary-surface);
}
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--primary-surface);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb {
  background-color: var(--secondary-surface);
  border-radius: 5px;
  border: 2px solid var(--primary-surface);
}
::-webkit-scrollbar-thumb:hover {
  background-color: var(--tertiary-surface);
}
::-webkit-scrollbar-corner {
  background: var(--primary-surface);
}

/* --- Buttons --- */
button {
  font-family: inherit;
  transition: background-color 0.25s ease, color 0.25s ease, transform 0.15s ease, opacity 0.25s ease, box-shadow 0.25s ease;
  background-color: var(--secondary-surface);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.9em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  font-weight: 500;
}

button:hover:not(:disabled):not(.transport-btn) {
  background-color: var(--tertiary-surface);
  border-color: var(--accent-hover);
  color: white;
  box-shadow: 0 3px 6px rgba(0,0,0, 0.2);
}

button:active:not(:disabled):not(.transport-btn) {
  transform: scale(0.96);
  background-color: var(--accent-hover);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
}

/* Links */
a {
  color: var(--accent-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Navigation Grid */
.homepage-content,
.piano-drop-container,
.text-content-area {
  background-color: var(--primary-surface);
  padding: 20px;
  box-sizing: border-box;
  margin-top: 30px;
  margin-bottom: 30px;
  width: 98vw;
  margin-left: auto;
  margin-right: auto;
  border-radius: 10px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.homepage-content {
  margin-top: 10px;
}

.nav-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  padding: 10px;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-item {
  flex-basis: 75px;
  flex-grow: 0;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.nav-item img {
  display: block;
  max-width: 100%;
  height: 65px;
  margin: 0 auto;
}

.nav-item a {
  display: block;
  transition: transform 0.2s ease;
}

.nav-item a:hover {
  transform: scale(1.1);
}

/* Text Content Area specific */
.text-content-area {
  padding: 20px 30px;
}

.text-content-area h3 {
  margin-top: 20px;
  margin-bottom: 10px;
  color: var(--text-muted-color);
  font-size: 1.2em;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 5px;
}

.text-content-area ul {
  list-style: disc;
  margin-left: 20px;
  line-height: 1.6;
  margin-bottom: 15px;
}

.text-content-area li {
  margin-bottom: 8px;
}

/* Main Content Container */
.piano-drop-container {
  text-align: center;
  height: auto;
}

.piano-drop-container h2,
.text-content-area h2 {
  color: var(--accent-color);
  margin-bottom: 20px;
  font-size: 1.5em;
  text-align: center;
}

.logobanner {
  text-align: center;
  margin-bottom: 30px;
}

.logobanner img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
}

/* Text Content Area paragraphs */
.text-content-area p {
  line-height: 1.6;
  margin-bottom: 15px;
  text-align: left;
}

/* App Container */
.app {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  contain: layout style;
}

/* Tooltips */
[data-tooltip] {
  position: relative;
}

[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #000;
  color: #fff;
  padding: 5px 8px;
  border-radius: 4px;
  font-size: 10px;
  white-space: nowrap;
  z-index: 100;
}

#playBtn:hover::after,
#recordBtn:hover::after {
  content: attr(data-tooltip) !important;
  position: absolute !important;
  bottom: calc(100% + 6px) !important;
  left: 50% !important;
  transform: translateX(-50%) !important;
  background: #000 !important;
  color: #fff !important;
  padding: 5px 8px !important;
  border-radius: 4px !important;
  font-size: 10px !important;
  white-space: nowrap !important;
  z-index: 100 !important;
  width: auto !important;
  height: auto !important;
  min-width: 0 !important;
  min-height: 0 !important;
  max-width: none !important;
  max-height: none !important;
  display: block !important;
  border: none !important;
  box-shadow: none !important;
  line-height: normal !important;
}

/* Loading Screen */
.loading {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 9999;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear 10;
}

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

/* Header Container Box */
.header-container {
  background-color: var(--surface);
  padding: 15px 20px;
  border-radius: 10px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.logo {
  font-size: 22px;
  font-weight: bold;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 2px;
}

.logo-sub {
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 3px;
}

/* Transport Controls */
.transport {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.transport-btn {
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--surface) !important;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 !important;
  margin: 0;
  line-height: 1;
  text-align: center;
  box-sizing: border-box;
  gap: 0 !important;
  box-shadow: none !important;
  vertical-align: middle;
  text-indent: 0;
  position: relative;
}

#playBtn {
  padding-left: 3px !important;
}

#playBtn::before {
  display: none !important;
}

#recordBtn {
  font-size: 0 !important;
}

#recordBtn::before {
  content: '';
  width: 14px !important;
  height: 14px !important;
  min-width: 14px !important;
  min-height: 14px !important;
  max-width: 14px !important;
  max-height: 14px !important;
  background: #fff !important;
  border-radius: 50% !important;
  display: block !important;
  box-shadow: none !important;
  transform: none !important;
  border: none !important;
  padding: 0 !important;
  margin: 0 !important;
  position: static !important;
}

.transport-btn:hover {
  border-color: var(--accent);
  transform: scale(1.05);
  box-shadow: none !important;
  background: var(--surface) !important;
}

#recordBtn:hover::before {
  width: 14px !important;
  height: 14px !important;
  transform: none !important;
}

.transport-btn:active {
  transform: scale(0.98);
  box-shadow: none !important;
}

.transport-btn.playing {
  background: linear-gradient(135deg, var(--accent), var(--accent2)) !important;
  border-color: transparent;
  color: #fff !important;
}

.transport-btn.playing:hover {
  background: linear-gradient(135deg, var(--accent), var(--accent2)) !important;
  color: #fff !important;
}

.transport-btn.recording {
  border-color: #ff4444;
  background: #ff4444 !important;
  color: #fff !important;
  box-shadow: 0 0 8px rgba(255,68,68,0.6) !important;
}

.transport-btn.recording:hover {
  background: #ff4444 !important;
  box-shadow: 0 0 8px rgba(255,68,68,0.6) !important;
}

.transport-btn.recording::before {
  background: #fff !important;
}

/* Tempo Display */
.tempo-display {
  text-align: center;
  background: var(--surface);
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.tempo-value {
  font-family: 'Space Mono', monospace;
  font-size: 22px;
  color: var(--accent);
}

.tempo-label {
  font-size: 8px;
  color: var(--muted);
}

.tempo-slider {
  width: 100px;
  accent-color: var(--accent);
}

/* Theme Selector */
.theme-selector {
  position: relative;
}

.theme-btn {
  padding: 10px 14px;
  border-radius: 8px;
  border: 2px solid var(--accent);
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #000;
  font-size: 11px;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 6px;
  background: rgba(20,20,30,0.98);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
  z-index: 100;
  max-height: 320px;
  overflow-y: auto;
}

.theme-option {
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  font-size: 11px;
  cursor: pointer;
  text-align: left;
  white-space: nowrap;
}

.theme-option:hover {
  background: rgba(255,255,255,0.1);
}

.theme-option.active {
  border-color: var(--accent);
  background: rgba(0,255,200,0.2);
  color: var(--accent);
}

/* Visualizer */
.visualizer {
  width: 100%;
  height: 50px;
  border-radius: 10px;
  background: rgba(0,0,0,0.4);
  margin-bottom: 14px;
  display: block;
}

/* Controls Panel */
.controls-panel {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
  padding: 14px 18px;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
  flex-wrap: wrap;
  align-items: flex-end;
}

/* Knobs */
.knobs {
  display: flex;
  gap: 16px;
}

.knob-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.knob {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--surface), rgba(0,0,0,0.5));
  box-shadow: inset 2px 2px 6px rgba(0,0,0,0.6);
  cursor: pointer;
  position: relative;
  user-select: none;
}

.knob:hover {
  transform: scale(1.05);
}

.knob-track {
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  border: 2px solid var(--border);
}

.knob.dragging .knob-track {
  border-color: var(--accent);
}

.knob-indicator {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
}

.knob-indicator span {
  width: 3px;
  height: 38%;
  background: linear-gradient(to bottom, var(--accent), transparent);
  border-radius: 2px;
}

.knob-value {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  color: var(--muted);
}

.knob-label {
  font-size: 9px;
  color: var(--muted);
  text-transform: uppercase;
}

/* Action Buttons */
.action-buttons {
  margin-left: auto;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.action-btn {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 11px;
  cursor: pointer;
}

.action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.action-btn.active {
  background: rgba(0,255,200,0.2);
  border-color: var(--accent);
  color: var(--accent);
}

/* Panels */
.panel {
  margin-bottom: 14px;
  padding: 16px;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.panel-title {
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 12px;
  text-transform: uppercase;
}

/* Presets Grid */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 8px;
}

.preset-btn {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
  color: var(--text);
  font-size: 11px;
  cursor: pointer;
  text-align: left;
}

.preset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.preset-btn .bpm {
  font-size: 9px;
  color: var(--muted);
  margin-top: 3px;
}

/* Sounds Grid */
.sounds-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sound-btn {
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
  color: var(--text);
  font-size: 11px;
  cursor: pointer;
}

.sound-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.sounds-section {
  margin-bottom: 16px;
}

.sounds-section-title {
  font-size: 10px;
  color: var(--accent);
  margin-bottom: 10px;
}

/* Custom Sound Section */
.custom-sound-section {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}

.custom-sound-btn {
  flex: 1;
  min-width: 140px;
  padding: 16px;
  border-radius: 10px;
  border: 2px dashed var(--border);
  background: rgba(0,0,0,0.2);
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.custom-sound-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.custom-sound-btn.recording {
  border-color: #ff4444;
  color: #ff4444;
}

.custom-sound-icon {
  font-size: 24px;
}

.custom-name-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.3);
  color: var(--text);
  font-size: 13px;
  margin-bottom: 12px;
}

.custom-name-input:focus {
  outline: none;
  border-color: var(--accent);
}

/* Recordings */
.recordings-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.recording-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(0,0,0,0.2);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.recording-name {
  font-size: 12px;
  flex: 1;
}

.recording-btn {
  width: 30px;
  height: 30px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
}

.recording-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.recording-btn.delete:hover {
  border-color: #ff4444;
  color: #ff4444;
}

.no-recordings {
  font-size: 12px;
  color: var(--muted);
  text-align: center;
  padding: 20px;
}

/* Channels Container */
.channels-container {
  background: var(--surface);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow-x: auto;
}

.channel-header {
  display: flex;
  margin-bottom: 8px;
}

.channel-header-left {
  width: 260px;
  flex-shrink: 0;
}

.channel-header-right {
  flex: 1;
  display: flex;
  min-width: 400px;
}

.step-num {
  flex: 1;
  text-align: center;
  font-family: 'Space Mono', monospace;
  font-size: 9px;
  color: var(--muted);
}

.step-num.beat {
  color: var(--text);
}

/* Channel Rows */
.channel {
  display: flex;
  align-items: center;
  padding: 5px 0;
}

.channel.muted {
  opacity: 0.4;
}

.channel-left {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
}

.channel-right {
  flex: 1;
  display: flex;
  gap: 3px;
  min-width: 400px;
}

.pad-trigger {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  font-size: 11px;
  cursor: pointer;
  flex-shrink: 0;
}

.pad-trigger:hover {
  background: rgba(0,255,200,0.15);
  border-color: var(--accent);
}

.channel-name {
  font-size: 9px;
  color: var(--muted);
  width: 40px;
  text-transform: uppercase;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex-shrink: 0;
}

.channel-btns {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}

.mute-btn,
.solo-btn {
  width: 16px;
  height: 16px;
  border-radius: 3px;
  border: 1px solid var(--border);
  background: transparent;
  font-size: 7px;
  font-weight: bold;
  cursor: pointer;
  color: var(--muted);
}

.mute-btn.active {
  background: #ff4444;
  border-color: #ff4444;
  color: #fff;
}

.solo-btn.active {
  background: #ffaa00;
  border-color: #ffaa00;
  color: #000;
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 2px 4px;
  background: rgba(0,0,0,0.3);
  border-radius: 4px;
  flex-shrink: 0;
}

.slider-label {
  font-size: 6px;
  color: var(--muted);
}

.mini-slider {
  -webkit-appearance: none;
  width: 24px;
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  cursor: pointer;
}

.mini-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
}

.replace-btn {
  padding: 3px 6px;
  border-radius: 3px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: 10px;
  cursor: pointer;
  flex-shrink: 0;
  margin-left: auto;
}

.replace-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Step Buttons */
.step {
  flex: 1;
  height: 28px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
  cursor: pointer;
  transition: all 0.1s;
  min-width: 20px;
}

.step:hover {
  border-color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.1);
}

.step.beat {
  border-color: rgba(0,255,200,0.3);
}

.step.active {
  background: var(--step-active);
  border-color: var(--accent);
  box-shadow: inset 0 0 10px rgba(0,255,200,0.3);
}

.step.playing {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.4);
}

.step.active.playing {
  background: var(--step-playing);
  border-color: #fff;
  box-shadow: 0 0 12px rgba(0,255,200,0.5);
}

/* Shortcuts */
.shortcuts {
  margin-top: 14px;
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 10px;
  color: var(--muted);
}

.shortcuts kbd {
  padding: 3px 7px;
  background: var(--surface);
  border-radius: 4px;
  margin-right: 4px;
  font-family: 'Space Mono', monospace;
  border: 1px solid var(--border);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: rgba(30,30,40,0.98);
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--border);
  max-width: 420px;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-title {
  font-size: 16px;
  margin-bottom: 16px;
}

.modal-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.modal-close {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #000;
  cursor: pointer;
  font-weight: 600;
}

/* Utility */
.hidden {
  display: none !important;
}