:root {
  --bg: #0a0a0a;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --glass: rgba(20, 20, 25, 0.55);
  --glass-border: rgba(255, 255, 255, 0.08);
  --text: #e5e5e5;
  --text-muted: #a3a3a3;
  --radius: 12px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}

canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
}

header, main {
  position: relative;
  z-index: 1;
  pointer-events: none;
}

header {
  padding: 2rem 1.5rem 1rem;
  text-align: center;
}

header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent-hover) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 12px var(--accent-glow));
}

/* Song list — hidden, kept for JS compatibility */

#song-list {
  display: none;
}

/* ——— Bottom player bar ——— */

#player {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  max-width: 480px;
  width: calc(100% - 140px);
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  pointer-events: auto;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

#player.hidden {
  transform: translateX(-50%) translateY(calc(100% + 1.25rem));
  opacity: 0;
  pointer-events: none;
}

#play-btn {
  background: none;
  border: none;
  color: var(--text);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  border-radius: 50%;
  transition: color 0.15s, background 0.15s;
}

#play-btn:hover:not(:disabled) {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

#play-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

#now-playing {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 1;
  min-width: 0;
}

#now-playing.active {
  color: var(--text);
}

#current-time,
#duration {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  min-width: 3ch;
  flex-shrink: 0;
}

#progress {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  transition: height 0.15s;
}

#progress:hover {
  height: 5px;
}

#progress:disabled {
  opacity: 0.4;
  cursor: default;
}

#progress::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  border: none;
  cursor: pointer;
  box-shadow: 0 0 6px var(--accent-glow);
  transition: transform 0.15s;
}

#progress:hover::-webkit-slider-thumb {
  transform: scale(1.3);
}

#progress::-moz-range-thumb {
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  border: none;
  cursor: pointer;
  box-shadow: 0 0 6px var(--accent-glow);
}

#download-btn {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color 0.15s;
  text-decoration: none;
}

#download-btn:hover {
  color: var(--text);
}

#download-btn.hidden {
  display: none;
}

/* ——— Icon buttons (music + fluid) ——— */

#music-btn,
#fluid-menu-btn {
  position: fixed;
  top: 1.25rem;
  z-index: 10;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  padding: 0;
  background: var(--glass);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, color 0.15s, border-color 0.15s;
  pointer-events: auto;
}

#music-btn {
  left: 1.25rem;
  width: 176px;
  height: 176px;
  transform: scale(0.25);
  transform-origin: top left;
}

#fluid-menu-btn {
  right: 1.25rem;
}

#music-btn:hover {
  transform: scale(1);
  box-shadow: 0 0 24px var(--accent-glow);
  border-color: rgba(255, 255, 255, 0.2);
  z-index: 20;
}

#fluid-menu-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 0 16px var(--accent-glow);
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.15);
}

#music-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}


#fluid-menu-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

/* ——— Fluid settings panel ——— */

#fluid-menu {
  position: fixed;
  top: 4.5rem;
  right: 1.25rem;
  z-index: 10;
  width: 240px;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  pointer-events: auto;
  transition: opacity 0.15s, transform 0.15s;
}

#fluid-menu.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
}

.fm-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}

#fluid-menu-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0 0.15rem;
  line-height: 1;
}

#fluid-menu-close:hover {
  color: var(--text);
}

.fm-body {
  padding: 0.5rem 0.85rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 60vh;
  overflow-y: auto;
}

.fm-toggle,
.fm-range {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  cursor: pointer;
}

.fm-range {
  flex-wrap: wrap;
}

.fm-range input[type="range"] {
  width: 100%;
  margin-top: 0.2rem;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
}

.fm-range input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: none;
  cursor: pointer;
}

.fm-range input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: none;
  cursor: pointer;
}

.fm-toggle input[type="checkbox"] {
  accent-color: var(--accent);
}

.fm-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.45rem 0;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: 0.15rem;
}

.fm-btn:hover {
  background: var(--accent-hover);
}

/* ——— Responsive ——— */

@media (max-width: 480px) {
  header h1 {
    font-size: 1.4rem;
  }

  #player {
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    width: calc(100% - 120px);
  }

  #now-playing {
    display: none;
  }
}

/* ——— Accessibility ——— */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  #music-btn:hover,
  #fluid-menu-btn:hover {
    transform: none !important;
  }
}