/* 
  Global Color Palette & Variables 
*/
:root {
  /* White Default (Google-like styling) */
  --bg-color: #f8f9fa;
  --surface-color: #ffffff;
  --surface-hover: #f1f3f4;
  --text-main: #202124;
  --text-muted: #5f6368;
  --text-inverse: #ffffff;
  --accent-color: #1a73e8;
  /* Google Blue */
  --accent-hover: #174ea6;
  --border-color: #dadce0;
  --shadow-sm: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --shadow-glow: 0 4px 6px 0 rgba(26, 115, 232, 0.3);
  --radius-lg: 16px;
  --radius-md: 8px;
  --font-family: 'Google Sans', 'Inter', sans-serif;
  --transition: all 0.3s ease;

  /* Badge Colors (White Theme) */
  --badge-completed-bg: #e6f4ea;
  --badge-completed-text: #137333;
  --badge-completed-border: #ceead6;
  --badge-processing-bg: #fef7e0;
  --badge-processing-text: #b06000;
  --badge-processing-border: #fce8b2;
  --badge-failed-bg: #fce8e6;
  --badge-failed-text: #c5221f;
  --badge-failed-border: #fad2cf;

  /* Upload Area */
  --upload-bg: #f8f9fa;
  --upload-hover-bg: #e8f0fe;

  /* Player Colors */
  --player-bg: #ffffff;
  --player-scrubber-bg: #dadce0;
  --player-btn-hover: #f1f3f4;
}

[data-theme="dark"] {
  /* Dark Default (Premium Dark Theme with Vibrant Accents) */
  --bg-color: #0d1117;
  --surface-color: #161b22;
  --surface-hover: #21262d;
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  --text-inverse: #ffffff;
  --accent-color: #58a6ff;
  --accent-hover: #1f6feb;
  --border-color: #30363d;
  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 15px rgba(88, 166, 255, 0.2);

  /* Badge Colors (Dark Theme) */
  --badge-completed-bg: rgba(46, 160, 67, 0.2);
  --badge-completed-text: #3fb950;
  --badge-completed-border: rgba(46, 160, 67, 0.4);
  --badge-processing-bg: rgba(210, 153, 34, 0.2);
  --badge-processing-text: #d29922;
  --badge-processing-border: rgba(210, 153, 34, 0.4);
  --badge-failed-bg: rgba(248, 81, 73, 0.2);
  --badge-failed-text: #f85149;
  --badge-failed-border: rgba(248, 81, 73, 0.4);

  /* Upload Area */
  --upload-bg: rgba(22, 27, 34, 0.5);
  --upload-hover-bg: rgba(88, 166, 255, 0.05);

  /* Player Colors */
  --player-bg: rgba(22, 27, 34, 0.8);
  --player-scrubber-bg: rgba(255, 255, 255, 0.1);
  --player-btn-hover: rgba(255, 255, 255, 0.1);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography */
h1,
h2,
h3 {
  color: var(--text-main);
  font-weight: 600;
  letter-spacing: -0.5px;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  filter: brightness(1.2);
}

/* Layout */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--surface-color);
  opacity: 0.95;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a {
  margin-left: 1.5rem;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-links a:hover {
  color: var(--text-main);
}

.container {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  flex: 1;
}

/* Glassmorphism Cards */
.card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(88, 166, 255, 0.4);
  box-shadow: var(--shadow-glow);
}

/* Forms & Inputs */
input,
select,
textarea,
.form-control {
  background-color: var(--surface-hover);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  background: var(--upload-bg);
  transition: var(--transition);
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: var(--accent-color);
  background: var(--upload-hover-bg);
}

.upload-icon {
  font-size: 3rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--accent-color);
  color: var(--text-inverse);
  border: none;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.btn:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--text-main);
  transform: translateY(0);
}

/* Track List */
.track-list {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.track-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.track-item:hover {
  background: var(--surface-hover);
  transform: translateX(4px);
}

.track-info {
  display: flex;
  flex-direction: column;
}

.track-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
}

.track-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.badge {
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge.completed {
  background: var(--badge-completed-bg);
  color: var(--badge-completed-text);
  border: 1px solid var(--badge-completed-border);
}

.badge.processing {
  background: var(--badge-processing-bg);
  color: var(--badge-processing-text);
  border: 1px solid var(--badge-processing-border);
}

.badge.failed {
  background: var(--badge-failed-bg);
  color: var(--badge-failed-text);
  border: 1px solid var(--badge-failed-border);
}

/* Custom Player Base Styles */
.custom-player {
  background: var(--player-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-top: 2rem;
  box-shadow: var(--shadow-sm);
}

.player-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.control-btn {
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
  transition: transform 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.control-btn:hover {
  background: var(--player-btn-hover);
  transform: scale(1.1);
}

.control-btn.play-btn {
  background: var(--accent-color);
  color: var(--text-inverse);
  font-size: 2rem;
  width: 64px;
  height: 64px;
  box-shadow: var(--shadow-glow);
}

.control-btn.play-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.05);
}

.timeline-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.time-display {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-width: 45px;
  font-variant-numeric: tabular-nums;
}

.scrubber {
  flex: 1;
  height: 6px;
  background: var(--player-scrubber-bg);
  border-radius: 3px;
  position: relative;
  cursor: pointer;
}

.progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--accent-color);
  border-radius: 3px;
  width: 0%;
}

.scrub-thumb {
  position: absolute;
  top: 50%;
  right: -6px;
  width: 14px;
  height: 14px;
  background: var(--text-inverse);
  border-radius: 50%;
  transform: translateY(-50%);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity 0.2s;
}

.scrubber:hover .scrub-thumb {
  opacity: 1;
}

/* Timeline Markers */
.note-marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background-color: #fbbc04; /* Yellow to stand out */
  border-radius: 50%;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.4);
  cursor: pointer;
  z-index: 10;
  transition: transform 0.2s, background-color 0.2s;
}

.note-marker:hover {
  transform: translate(-50%, -50%) scale(1.5);
  background-color: #fce8b2;
}

/* Heatmap visualization */
.heatmap-bar {
  display: flex;
  height: 40px;
  width: 100%;
  background: var(--surface-color);
  border-radius: var(--radius-md);
  margin-top: 1rem;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.heatmap-bucket {
  flex: 1;
  height: 100%;
  transition: background-color 0.3s ease;
  min-width: 2px;
}

/* 
  ---------------------------------
  Music Player App Layout 
  ---------------------------------
*/

.app-layout {
  display: flex;
  height: calc(100vh - 72px);
  /* Fallback minus navbar */
  overflow: hidden;
}

.sidebar {
  width: 250px;
  background: var(--surface-color);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-bottom: 1rem;
  padding-left: 0.5rem;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  color: var(--text-main);
  border-radius: var(--radius-md);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.sidebar-link i {
  font-size: 1.25rem;
  color: var(--text-muted);
}

.sidebar-link:hover,
.sidebar-link.active {
  background: var(--surface-hover);
  color: var(--accent-color);
}

.sidebar-link:hover i,
.sidebar-link.active i {
  color: var(--accent-color);
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  background: var(--bg-color);
}

.top-bar {
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  background: var(--surface-color);
}

.library-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 2rem;
  padding-bottom: 120px;
  /* space for bottom player */
}

/* Track Table */
.track-table {
  width: 100%;
  border-collapse: collapse;
}

.track-table th {
  text-align: left;
  padding: 1rem;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.track-table th:hover {
  color: var(--text-main);
}

.track-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.track-row {
  transition: var(--transition);
}

.track-row:hover {
  background: var(--surface-hover);
}

.track-row.playing {
  background: rgba(88, 166, 255, 0.1);
}

.track-row.playing td {
  color: var(--accent-color);
}

/* Action Icons */
.action-icon {
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.25rem;
  transition: var(--transition);
  padding: 0.25rem;
}

.action-icon:hover {
  color: var(--accent-color);
  transform: scale(1.1);
}

.action-icon.active.favorite {
  color: #fbbc04;
}

/* Importance Badges */
.imp-badge {
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.imp-high {
  background: rgba(248, 81, 73, 0.2);
  color: #f85149;
  border: 1px solid rgba(248, 81, 73, 0.4);
}

.imp-medium {
  background: rgba(210, 153, 34, 0.2);
  color: #d29922;
  border: 1px solid rgba(210, 153, 34, 0.4);
}

.imp-low {
  background: rgba(46, 160, 67, 0.2);
  color: #3fb950;
  border: 1px solid rgba(46, 160, 67, 0.4);
}

/* Bottom Player */
.bottom-player {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 90px;
  background: var(--surface-color);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 2rem;
  justify-content: space-between;
  z-index: 100;
  box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.1);
}

.player-track-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 30%;
}

.player-controls-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 40%;
  gap: 0.5rem;
}

.player-buttons {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.player-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.player-btn:hover {
  color: var(--text-main);
  transform: scale(1.1);
}

.player-btn.active {
  color: var(--accent-color);
}

.player-btn.play-pause {
  background: var(--text-main);
  color: var(--surface-color);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.player-btn.play-pause:hover {
  transform: scale(1.05);
  background: var(--accent-color);
}

.player-scrubber {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.player-volume {
  width: 30%;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.5rem;
}

.player-volume i {
  color: var(--text-muted);
  font-size: 1.25rem;
}

.player-volume input[type="range"] {
  width: 100px;
}

/* Hide default scrollbar but keep functionality */
.library-scroll::-webkit-scrollbar,
.sidebar::-webkit-scrollbar {
  width: 6px;
}

.library-scroll::-webkit-scrollbar-thumb,
.sidebar::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

/* Upload Dropdown Container */
.upload-dropdown {
  position: relative;
  display: inline-block;
}

.upload-dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  background-color: var(--surface-color);
  min-width: 160px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  z-index: 10;
  overflow: hidden;
}

.upload-dropdown:hover .upload-dropdown-content {
  display: block;
}

.upload-dropdown-content label {
  color: var(--text-main);
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  cursor: pointer;
  font-size: 0.9rem;
}

.upload-dropdown-content label:hover {
  background-color: var(--surface-hover);
}