/* ═══════════════════════════════════════
   INSTRUMENTAL — Audio Visualizer
   Minimalist B&W UI + Colorful Visualizer
   ═══════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Dark Mode (default) ── */
:root {
  --bg: #080808;
  --bg-panel: #111111;
  --bg-input: #181818;
  --bg-hover: #1e1e1e;
  --bg-active: #242424;
  --border: rgba(255,255,255,0.1);
  --border-strong: rgba(255,255,255,0.2);
  --text-1: #f5f5f5;
  --text-2: #888;
  --text-3: #555;
  --accent-1: #00f0ff;
  --accent-2: #ff00e5;
  --accent-gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --error-bg: rgba(255,60,60,0.08);
  --error-border: rgba(255,60,60,0.2);
  --error-text: #ff6b6b;
  --overlay: rgba(8,8,8,0.85);
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 16px;
  --t: 0.15s ease;
  --t-med: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter', -apple-system, sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

/* ── Light Mode ── */
/* Dark theme only — light mode removed */


/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Ensure hidden attribute always hides elements, even inside flex/grid */
[hidden] { display: none !important; }

/* ── Navigation Buttons ── */
.nav-sources {
  display: flex; gap: 8px;
  background: rgba(255, 255, 255, 0.03);
  padding: 4px; border-radius: 100px;
  border: 1px solid var(--border);
}
.nav-btn {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 16px; border-radius: 100px;
  background: transparent; color: var(--text-2);
  font-size: 13px; font-weight: 500;
  transition: all 0.2s ease;
  border: none; cursor: pointer;
}
.nav-btn svg { opacity: 0.7; transition: opacity 0.2s ease; }
.nav-btn:hover { background: rgba(255, 255, 255, 0.06); color: var(--text-1); }
.nav-btn:hover svg { opacity: 1; }
.nav-btn.active { background: #fff; color: #000; }
.nav-btn.active svg { opacity: 1; }

html, body {
  width: 100%; height: 100%; overflow: hidden;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-1);
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

/* ── Canvas ── */
#bgCanvas, #visualizerCanvas {
  position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}
#bgCanvas { z-index: 0; }
#visualizerCanvas { z-index: 1; }

/* ── Header ── */
#appHeader {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  height: 52px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: opacity var(--t-med), transform var(--t-med), background 0.3s;
}
#appHeader.hidden { opacity: 0; transform: translateY(-100%); pointer-events: none; }

.header-left, .header-right { display: flex; align-items: center; gap: 6px; }
.header-center { flex: 1; text-align: center; }

.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.logo-icon { font-size: 18px; line-height: 1; }
.logo-text { font-size: 15px; font-weight: 700; letter-spacing: -0.3px; color: var(--text-1); }

.now-playing-label {
  font-size: 12px; color: var(--text-2);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 360px; display: inline-block; letter-spacing: 0.01em;
}

.icon-btn {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border: 1px solid transparent;
  border-radius: var(--radius-sm); color: var(--text-2);
  cursor: pointer; transition: all var(--t);
}
.icon-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border);
  color: var(--text-1);
}

/* ── Source Panel ── */
#sourcePanel {
  position: fixed; z-index: 50;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 90%; max-width: 520px;
  padding: 32px 28px 28px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: opacity var(--t-med), transform var(--t-med), background 0.3s, border-color 0.3s;
}
#sourcePanel.hidden { opacity: 0; visibility: hidden; transform: translate(-50%, -50%) scale(0.97); pointer-events: none; }

/* ── Hero Overlay ── */
.hero-overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  z-index: 10;
  background: transparent;
  pointer-events: auto;
  transition: opacity 0.8s ease, visibility 0.8s;
  text-align: center;
  padding: 0 24px;
}
.hero-overlay.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.hero-content {
  max-width: 900px;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: heroIn 1s cubic-bezier(0.16,1,0.3,1) 0.5s both;
}
@keyframes heroIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-title {
  font-size: 88px; font-weight: 500; letter-spacing: -3px; line-height: 1;
  color: var(--text-1); margin-bottom: 32px;
}
.hero-description {
  font-size: 20px; color: var(--text-2); line-height: 1.5;
  max-width: 700px; margin: 0 auto 48px; font-weight: 400;
}
.hero-cta {
  padding: 16px 32px; font-size: 16px; font-weight: 600;
  border-radius: 40px; box-shadow: 0 8px 24px rgba(255,255,255,0.1);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255,255,255,0.15);
}

@keyframes panelIn {
  from { opacity: 0; transform: translate(-50%, -47%) scale(0.96); }
  to   { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.panel-title {
  font-family: var(--font);
  font-size: 32px; font-weight: 700; letter-spacing: -1px;
  color: var(--text-1); margin-bottom: 8px;
}
.panel-subtitle { font-size: 15px; color: var(--text-2); margin-bottom: 28px; }

/* ── Source Tabs ── */
.source-tabs {
  display: flex; gap: 2px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px; margin-bottom: 20px;
  background: var(--bg-input);
}
.source-tab {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 10px 6px;
  background: transparent; border: none; border-radius: 7px;
  color: var(--text-2); cursor: pointer;
  font-family: var(--font); font-size: 11px; font-weight: 500;
  transition: all var(--t); letter-spacing: 0.02em;
}
.source-tab:hover { color: var(--text-1); background: var(--bg-hover); }
.source-tab.active {
  color: var(--text-1);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
[data-theme="light"] .source-tab.active { box-shadow: 0 1px 4px rgba(0,0,0,0.08); }

/* ── Source Views ── */
.source-view { display: none; animation: fadeUp 0.25s ease; }
.source-view.active { display: block; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }

/* ── Drop Zone ── */
.drop-zone {
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 36px 20px;
  transition: all var(--t-med);
  cursor: pointer;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--text-1);
  background: var(--bg-hover);
}
.drop-zone.drag-over { transform: scale(1.01); }
.drop-zone-icon { color: var(--text-3); margin-bottom: 10px; }
.drop-zone-text { font-size: 14px; color: var(--text-2); margin-bottom: 4px; }
.drop-zone-hint { font-size: 12px; color: var(--text-3); margin-bottom: 14px; }

.btn-browse {
  padding: 8px 20px;
  background: transparent; border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); color: var(--text-1);
  font-family: var(--font); font-size: 12px; font-weight: 500;
  cursor: pointer; transition: all var(--t);
}
.btn-browse:hover { background: var(--bg-hover); border-color: var(--text-1); }

/* ── YouTube Input ── */
.youtube-input-group { display: flex; gap: 8px; margin-bottom: 6px; }
.input-wrapper {
  flex: 1; display: flex; align-items: center; gap: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 12px;
  transition: border-color var(--t);
}
.input-wrapper:focus-within { border-color: var(--text-1); }
.input-icon { color: var(--text-3); flex-shrink: 0; }
.input-wrapper input {
  flex: 1; padding: 11px 0;
  background: transparent; border: none; outline: none;
  color: var(--text-1); font-family: var(--font); font-size: 13px;
}
.input-wrapper input::placeholder { color: var(--text-3); }

.btn-primary {
  padding: 11px 20px;
  background: var(--text-1);
  border: none; border-radius: var(--radius-sm);
  color: var(--bg); font-family: var(--font); font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all var(--t);
  display: flex; align-items: center; gap: 7px;
  white-space: nowrap;
}
.btn-primary:hover { opacity: 0.85; }
.btn-primary:disabled { opacity: 0.35; cursor: not-allowed; }

.btn-loader {
  width: 14px; height: 14px;
  border: 2px solid rgba(128,128,128,0.4);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.source-hint { font-size: 11px; color: var(--text-3); text-align: left; }
.error-msg {
  margin-top: 8px; padding: 10px 14px;
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  border-radius: var(--radius-sm);
  color: var(--error-text); font-size: 12px; text-align: left; line-height: 1.5;
}

.youtube-info {
  display: flex; align-items: center; gap: 12px;
  margin-top: 12px; padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: left;
}
.yt-thumb { width: 72px; height: 40px; border-radius: 4px; object-fit: cover; }
.yt-title { font-size: 12px; font-weight: 600; margin-bottom: 2px; color: var(--text-1); }
.yt-channel { font-size: 11px; color: var(--text-2); }

/* ── Mic ── */
.mic-container { display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 24px 20px; }
.btn-mic {
  position: relative;
  width: 72px; height: 72px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 50%; color: var(--text-2);
  cursor: pointer; transition: all var(--t-med);
}
.btn-mic:hover { border-color: var(--text-1); color: var(--text-1); }
.btn-mic.active { border-color: #ff4444; color: #ff4444; }
.mic-pulse {
  position: absolute; inset: -6px;
  border-radius: 50%; border: 1px solid transparent;
}
.btn-mic.active .mic-pulse {
  border-color: rgba(255,68,68,0.3);
  animation: micPulse 1.5s ease-in-out infinite;
}
@keyframes micPulse {
  0%,100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.15); opacity: 0.3; }
}
.mic-label { font-size: 13px; color: var(--text-2); }

/* ── Demo ── */
.demo-container { display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 24px 20px; }
.demo-text { font-size: 13px; color: var(--text-2); }
.btn-demo { gap: 8px; padding: 12px 28px; font-size: 14px; }

/* ── Playback Bar ── */
#playbackBar {
  position: fixed; bottom: 18px; left: 50%;
  transform: translateX(-50%);
  z-index: 80;
  display: flex; align-items: center; gap: 14px;
  width: 90%; max-width: 700px;
  padding: 10px 18px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 40px;
  animation: slideUp 0.4s cubic-bezier(0.16,1,0.3,1);
  transition: background 0.3s, border-color 0.3s;
}
#playbackBar[hidden] { display: none; }
@keyframes slideUp {
  from { opacity: 0; transform: translateX(-50%) translateY(16px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.playback-left, .playback-right { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }
.playback-center { flex: 1; min-width: 0; }

.ctrl-btn {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border: none;
  border-radius: 50%; color: var(--text-2);
  cursor: pointer; transition: all var(--t);
}
.ctrl-btn:hover { color: var(--text-1); background: var(--bg-hover); }

.track-info { display: flex; flex-direction: column; gap: 4px; }
.track-name {
  font-size: 12px; font-weight: 500; color: var(--text-1);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 100%;
}

.progress-row { display: flex; align-items: center; gap: 8px; }
.time-label { font-size: 10px; color: var(--text-3); font-family: var(--mono); min-width: 34px; }
.progress-bar {
  flex: 1; height: 3px; position: relative;
  background: var(--border);
  border-radius: 2px; cursor: pointer;
  transition: height var(--t);
}
.progress-bar:hover { height: 5px; }
.progress-fill {
  height: 100%; width: 0%;
  background: var(--accent-gradient);
  border-radius: 2px;
  transition: width 0.1s linear;
}
.progress-handle {
  position: absolute; top: 50%; right: 0;
  width: 10px; height: 10px;
  background: var(--text-1); border-radius: 50%;
  transform: translate(50%, -50%) scale(0);
  transition: transform var(--t);
}
.progress-bar:hover .progress-handle { transform: translate(50%, -50%) scale(1); }

.volume-slider {
  width: 72px; height: 3px;
  -webkit-appearance: none; appearance: none;
  background: var(--border);
  border-radius: 2px; outline: none; cursor: pointer;
}
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px; height: 10px;
  background: var(--text-1);
  border-radius: 50%; cursor: pointer;
}

/* ── Settings Panel ── */
.settings-panel {
  position: fixed; top: 60px; right: 14px; bottom: 90px;
  z-index: 90; width: 300px;
  display: flex; flex-direction: column;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: slideInRight 0.3s cubic-bezier(0.16,1,0.3,1);
  transition: background 0.3s, border-color 0.3s;
}
.settings-panel[hidden] { display: none; }
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(14px); }
  to   { opacity: 1; transform: translateX(0); }
}

.settings-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 18px 14px;
  border-bottom: 1px solid var(--border);
}
.settings-header h3 { font-size: 13px; font-weight: 600; letter-spacing: 0.02em; color: var(--text-1); }

.settings-body {
  flex: 1; overflow-y: auto; padding: 14px 18px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.settings-body::-webkit-scrollbar { width: 3px; }
.settings-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.setting-group { margin-bottom: 20px; }
.setting-label {
  display: flex; justify-content: space-between;
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.07em;
  margin-bottom: 8px; color: var(--text-2);
}
.setting-value { color: var(--accent-1); font-family: var(--mono); font-size: 10px; text-transform: none; letter-spacing: 0; }
.setting-sublabel { font-size: 10px; color: var(--text-3); margin-bottom: 6px; display: block; }

/* Viz Modes */
.viz-modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; }
.viz-mode {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 9px 6px;
  background: var(--bg-input);
  border: 1px solid transparent; border-radius: var(--radius-sm);
  color: var(--text-3); cursor: pointer;
  font-family: var(--font); font-size: 10px; font-weight: 500;
  transition: all var(--t);
}
.viz-mode:hover { background: var(--bg-hover); color: var(--text-2); border-color: var(--border); }
.viz-mode.active {
  background: var(--bg-active);
  border-color: var(--border-strong);
  color: var(--text-1);
}

/* Color Presets */
.color-presets { display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; margin-bottom: 12px; }
.color-preset {
  display: flex; align-items: center; gap: 6px;
  padding: 7px 9px;
  background: var(--bg-input);
  border: 1px solid transparent; border-radius: var(--radius-sm);
  color: var(--text-3); cursor: pointer;
  font-family: var(--font); font-size: 10px; font-weight: 500;
  transition: all var(--t);
}
.color-preset:hover { border-color: var(--border); }
.color-preset.active { border-color: var(--border-strong); background: var(--bg-active); color: var(--text-1); }
.color-swatch { width: 14px; height: 14px; border-radius: 3px; flex-shrink: 0; }

.custom-colors { margin-top: 6px; }
.color-pickers { display: flex; gap: 12px; }
.color-pick { display: flex; align-items: center; gap: 8px; }
.color-pick label { font-size: 11px; color: var(--text-2); }
button.color-swatch {
  width: 28px; height: 22px;
  border: 1px solid var(--border); border-radius: 4px;
  cursor: pointer; padding: 0; display: block;
}
.color-picker-wrapper { position: relative; }
.color-popup {
  position: absolute;
  bottom: calc(100% + 8px); /* Pop up above the button so it doesn't get clipped */
  left: 0;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  border-radius: 8px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 8px;
}

/* Slider */
.setting-slider {
  width: 100%; height: 3px;
  -webkit-appearance: none; appearance: none;
  background: var(--border);
  border-radius: 2px; outline: none; cursor: pointer;
}
.setting-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px; height: 13px;
  background: var(--text-1); border-radius: 50%;
  cursor: pointer;
}

/* Toggle */
.setting-toggle-row { display: flex; justify-content: space-between; align-items: center; }
.setting-toggle-row .setting-label { margin-bottom: 0; }
.toggle { position: relative; width: 36px; height: 20px; cursor: pointer; }
.toggle input { display: none; }
.toggle-slider {
  position: absolute; inset: 0;
  background: var(--border-strong);
  border-radius: 10px;
  transition: background var(--t);
}
.toggle-slider::before {
  content: '';
  position: absolute; top: 3px; left: 3px;
  width: 14px; height: 14px;
  background: var(--bg); border-radius: 50%;
  transition: transform var(--t);
}
[data-theme="light"] .toggle-slider::before { background: #fff; }
.toggle input:checked + .toggle-slider { background: var(--text-1); }
.toggle input:checked + .toggle-slider::before { transform: translateX(16px); }

/* Shortcuts */
.shortcuts-list { display: flex; flex-direction: column; gap: 6px; }
.shortcut { display: flex; align-items: center; justify-content: space-between; }
.shortcut kbd {
  padding: 2px 7px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--mono); font-size: 10px; color: var(--text-2);
}
.shortcut span { font-size: 11px; color: var(--text-3); }

/* FPS */
.fps-counter {
  position: fixed; top: 58px; left: 14px;
  z-index: 90; padding: 4px 10px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--mono); font-size: 11px; color: var(--text-2);
}
.fps-counter[hidden] { display: none; }

/* Loading */
.loading-overlay {
  position: fixed; inset: 0; z-index: 200;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  background: var(--overlay);
  backdrop-filter: blur(8px);
  transition: background 0.3s;
}
.loading-overlay[hidden] { display: none; }
.loading-spinner {
  width: 32px; height: 32px;
  border: 2px solid var(--border);
  border-top-color: var(--text-1);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
#loadingText { font-size: 13px; color: var(--text-2); }

/* Toast */
.toast-container {
  position: fixed; bottom: 90px; left: 50%;
  transform: translateX(-50%); z-index: 300;
  display: flex; flex-direction: column; gap: 6px; align-items: center;
}
.toast {
  padding: 8px 16px;
  background: var(--text-1);
  border-radius: 20px;
  font-size: 12px; color: var(--bg);
  font-weight: 500;
  animation: toastIn 0.35s cubic-bezier(0.16,1,0.3,1);
  white-space: nowrap;
}
.toast.out { animation: toastOut 0.25s ease forwards; }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px) scale(0.95); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(-6px) scale(0.95); } }

/* ── Divider in settings ── */
.setting-divider {
  height: 1px; background: var(--border);
  margin: 4px 0 20px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  #sourcePanel { width: 95%; padding: 22px 16px 18px; }
  .panel-title { font-size: 20px; }
  .settings-panel { right: 8px; left: 8px; width: auto; top: 56px; bottom: 84px; }
  .viz-modes { grid-template-columns: repeat(2, 1fr); }
  .color-presets { grid-template-columns: repeat(2, 1fr); }
  #playbackBar { width: 96%; padding: 9px 14px; gap: 10px; bottom: 12px; }
  .volume-slider { width: 56px; }
  .progress-row .time-label { display: none; }
}

@media (max-width: 480px) {
  #appHeader { padding: 0 14px; }
  .logo-text { font-size: 14px; }
  .now-playing-label { max-width: 140px; }
  .youtube-input-group { flex-direction: column; }
  .btn-primary { width: 100%; justify-content: center; }
  .playback-right .volume-slider { display: none; }
}