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

:root {
  --bg: #0a0e1a;
  --bg-gradient: #0f1419;
  --panel: #161b26;
  --panel-hover: #1c2230;
  --text: #e8eaf0;
  --text-bright: #ffffff;
  --muted: #8b92a8;
  --accent: #5b9eff;
  --accent-hover: #7ab4ff;
  --border: rgba(255,255,255,0.06);
  --shadow: rgba(0,0,0,0.4);
}

html, body {
  height: 100%;
  margin: 0;
  background: linear-gradient(135deg, var(--bg-gradient) 0%, var(--bg) 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  overflow: hidden;
}

.layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.player {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 32px;
  overflow-y: auto;
  background: var(--bg);
}

.queue {
  width: 380px;
  background: var(--panel);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: -4px 0 20px var(--shadow);
}

.nowplaying {
  display: grid;
  grid-template-columns: minmax(300px, 45%) 1fr;
  gap: 48px;
  align-items: center;
  flex: 1;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  padding: 0 32px;
}

.cover {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 14px;
  box-shadow: 0 12px 48px var(--shadow);
}

.cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.playerControls {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 32px;
}

.meta {
  text-align: left;
  width: 100%;
}

.meta .title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-bright);
  margin-bottom: 12px;
}

.meta .subtitle {
  color: var(--muted);
  font-size: 18px;
  font-weight: 500;
}

.controls {
  display: flex;
  gap: 12px;
  justify-content: flex-start;
  align-items: center;
  width: 100%;
}

.modeControls {
  width: 100%;
  margin: 16px 0;
}

.modeSwitch {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.modeBtn {
  flex: 1;
  padding: 10px 16px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  text-align: center;
}

.modeBtn.active {
  background: var(--accent);
  color: var(--text-bright);
  border-color: var(--accent);
}

.modeBtn:hover:not(.active) {
  background: var(--panel-hover);
  border-color: var(--accent);
}

.timeMarginSelector {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.timeMarginLabel {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

#timeMarginSelect {
  flex: 1;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 14px;
  outline: none;
  cursor: pointer;
}

#timeMarginSelect:hover {
  border-color: var(--accent);
}

#timeMarginSelect:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(91, 158, 255, 0.2);
}

.dateTypeSelector {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-top: 8px;
}

.dateTypeLabel {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

#dateTypeSelect {
  flex: 1;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 14px;
  outline: none;
  cursor: pointer;
}

#dateTypeSelect:hover {
  border-color: var(--accent);
}

#dateTypeSelect:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(91, 158, 255, 0.2);
}

button {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 14px 20px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  white-space: nowrap;
}

button:hover {
  background: var(--panel-hover);
  border-color: var(--accent);
  color: var(--text-bright);
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

#playBtn, #pauseBtn {
  background: var(--accent);
  color: var(--text-bright);
  border-color: var(--accent);
  padding: 14px 32px;
  font-weight: 600;
}

#playBtn:hover, #pauseBtn:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.timeline {
  width: 100%;
}

.time {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
  text-align: left;
}

.volume {
  width: 100%;
}

.volumeLabel {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 8px;
}

#volumeIcon {
  font-size: 16px;
}

#volumePercent {
  min-width: 40px;
}

input[type=range] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255,255,255,0.1);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

input[type=range]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.queueHeader {
  padding: 24px 24px 16px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-bright);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.queueContent {
  flex: 1;
  overflow-y: auto;
  padding: 16px 24px;
}

.queueSection {
  margin-bottom: 24px;
}

.queueLabel {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  font-weight: 600;
}

.queueList {
  list-style: none;
  padding: 0;
  margin: 0;
}

.queueList li {
  padding: 10px 12px;
  color: var(--text);
  border-radius: 8px;
  margin-bottom: 4px;
  transition: all 0.2s ease;
  cursor: pointer;
  border-left: 3px solid transparent;
}

.queueList li:hover {
  background: rgba(255,255,255,0.05);
}

.queueList li.current {
  background: rgba(91,158,255,0.15);
  border-left-color: var(--accent);
  font-weight: 600;
}

.queueList li.current:hover {
  background: rgba(91,158,255,0.2);
}

.queueItemTitle {
  color: var(--text);
  font-size: 14px;
  line-height: 1.4;
}

.queueList li.current .queueItemTitle {
  color: var(--text-bright);
}

.queueItemFolder {
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
}

.queueItemDate {
  color: var(--muted);
  font-size: 11px;
  margin-top: 2px;
  font-style: italic;
}

.no-albums-message {
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-style: italic;
  border: 1px dashed var(--border);
  border-radius: 8px;
  margin: 16px;
  background: rgba(255, 255, 255, 0.03);
}

.queueFooter {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

.queueFooter button {
  width: 100%;
  padding: 12px;
}

#toggleQueue {
  display: none;
  position: fixed;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  background: var(--panel);
  color: var(--text-bright);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 20px;
  box-shadow: 0 2px 8px var(--shadow);
  z-index: 1000;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}

#toggleQueue:hover {
  background: var(--panel-hover);
  border-color: var(--accent);
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--text-bright);
  border-radius: 2px;
  transition: all 0.3s ease;
}

#toggleQueue.active .hamburger-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

#toggleQueue.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

#toggleQueue.active .hamburger-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Styles */
@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }

  .player {
    padding: 20px;
    overflow-y: auto;
  }

  .nowplaying {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 0;
  }

  .queue {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100vh;
    border-left: none;
    border-top: none;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 999;
  }

  .queue.visible {
    transform: translateX(0);
  }

  #toggleQueue {
    display: flex;
  }

  .cover {
    max-width: 100%;
  }

  .meta {
    text-align: center;
  }

  .meta .title {
    font-size: 24px;
  }

  .meta .subtitle {
    font-size: 16px;
  }

  .controls {
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
  }

  .timeline {
    text-align: center;
  }

  .time {
    text-align: center;
  }

  button {
    padding: 12px 16px;
    font-size: 13px;
  }

  #playBtn, #pauseBtn {
    padding: 12px 24px;
  }
}

/* Tablet Styles */
@media (max-width: 1024px) and (min-width: 769px) {
  .queue {
    width: 320px;
  }

  .player {
    padding: 24px;
  }

  .nowplaying {
    gap: 32px;
  }

  .meta .title {
    font-size: 32px;
  }
}