/* Apple Music iOS Style - Glassmorphism Design */

:root {
    --header-height: 56px;
    --menu-height: 64px;
    --player-height: 88px;
}

/* Base Styles */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Glass Utility Classes */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
}

.glass-strong {
  background: var(--player-bg);
  backdrop-filter: blur(40px) saturate(200%);
  -webkit-backdrop-filter: blur(40px) saturate(200%);
  border: 1px solid var(--glass-border);
  box-shadow: 0 12px 48px var(--glass-shadow);
}

/* Header */
header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--header-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  color: var(--text-primary);
  height: var(--header-height);
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  z-index: 100;
  padding: 0 16px;
}

.header-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  flex: 1;
  text-align: center;
}

.theme-toggle-header {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-primary);
  font-size: 18px;
  z-index: 1500;
  background: transparent;
  padding: 8px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-header:hover {
  background: var(--card-hover);
  transform: translateY(-50%) scale(1.05);
}

.theme-toggle-header:active {
  transform: translateY(-50%) scale(0.95);
}

/* Menu Bar - Pill Style Tabs */
.menu-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  background: var(--header-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  flex-shrink: 0;
  height: var(--menu-height);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.menu-bar::-webkit-scrollbar {
  display: none;
}

.menu {
  display: flex;
  gap: 8px;
  padding: 0;
  flex-shrink: 0;
  scroll-snap-type: x mandatory;
}

.menu-btn {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 20px;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  scroll-snap-align: start;
  min-height: 40px;
}

.menu-btn:hover {
  background: var(--card-hover);
  transform: scale(1.02);
}

.menu-btn:active {
  transform: scale(0.98);
}

.menu-btn.active {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

/* Top Controls */
.top-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.list-count {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  background: var(--card-bg);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Segmented Control */
.segmented {
  display: inline-flex;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  padding: 2px;
}

.segmented button {
  padding: 6px 12px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 10px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 32px;
}

.segmented button.active {
  background: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.3);
}

/* Icon Buttons */
.icon-btn {
  border: none;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 8px;
  font-size: 16px;
  cursor: pointer;
  color: var(--text-primary);
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--border);
  min-width: 36px;
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: var(--card-hover);
  transform: scale(1.05);
}

.icon-btn:active {
  transform: scale(0.95);
}

/* Search */
.compact-search {
  position: relative;
}

.compact-search input {
  width: 180px;
  padding: 8px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  outline: none;
  font-size: 14px;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-primary);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 500;
}

.compact-search input::placeholder {
  color: var(--text-secondary);
}

.compact-search input:focus {
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.15);
  border-color: var(--accent);
  background: var(--card-hover);
}

/* Visibility Helpers */
.mobile-only { display: none; }
.desktop-only { display: inline-flex; }

/* Filter Menu (Mobile) */
.filter-menu {
  position: fixed;
  top: calc(var(--header-height) + var(--menu-height) + 12px);
  right: 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 8px;
  box-shadow: 0 12px 48px var(--glass-shadow);
  z-index: 1200;
  display: none;
  flex-direction: column;
  gap: 4px;
  min-width: 140px;
}

.filter-menu.open {
  display: flex;
  animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.filter-menu .fm-item {
  padding: 10px 14px;
  border: none;
  background: transparent;
  text-align: left;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  border-radius: 10px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.filter-menu .fm-item:hover {
  background: var(--card-hover);
}

.filter-menu .fm-item.active {
  background: var(--accent);
  color: #FFFFFF;
}

/* Search FAB and Overlay (Mobile) */
.search-fab {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: transparent;
  border: none;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1500;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--text-primary);
  padding: 8px;
}

.search-fab:hover {
  background: var(--card-hover);
  transform: translateY(-50%) scale(1.05);
}

.search-fab:active {
  transform: translateY(-50%) scale(0.95);
}

.search-fab.hidden {
  display: none !important;
}

.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: none;
  align-items: center;
  gap: 12px;
  padding: 0 12px;
  background: var(--header-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  z-index: 1600;
  border-bottom: 1px solid var(--border);
}

.search-overlay.open {
  display: flex;
  animation: fadeIn 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.search-overlay input {
  flex: 1;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  outline: none;
  font-size: 16px;
  background: var(--card-bg);
  color: var(--text-primary);
  font-weight: 500;
}

.search-overlay input:focus {
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
  border-color: var(--accent);
}

.search-overlay input::placeholder {
  color: var(--text-secondary);
}

.search-close-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--card-bg);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-close-btn:hover {
  background: var(--card-hover);
  color: var(--text-primary);
}

.search-close-btn:active {
  transform: scale(0.95);
}

/* Audio Player (Hidden) */
#player {
  position: fixed;
  top: -9999px;
}

/* Container */
.container {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--text-tertiary) transparent;
  -webkit-overflow-scrolling: touch;
  padding: 16px;
  padding-bottom: calc(var(--player-height) + 32px);
  box-sizing: border-box;
}

.container::-webkit-scrollbar {
  width: 6px;
}

.container::-webkit-scrollbar-track {
  background: transparent;
}

.container::-webkit-scrollbar-thumb {
  background: var(--text-tertiary);
  border-radius: 3px;
}

.container::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Song List */
ul.song-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 1200px;
  margin: 0 auto;
}

li.song-item {
  padding: 14px 18px;
  background: var(--card-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  flex-shrink: 0;
  color: var(--text-primary);
  min-height: 52px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px var(--glass-shadow);
}

li.song-item:hover {
  background: var(--card-hover);
  transform: scale(1.01);
  box-shadow: 0 4px 16px var(--glass-shadow);
}

li.song-item:active {
  transform: scale(0.99);
}

li.song-item.playing {
  background: var(--card-hover);
  border-color: var(--accent);
  font-weight: 600;
  box-shadow: 0 0 0 2px var(--accent), 0 8px 24px var(--glass-shadow);
}

.song-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 85%;
  font-size: 16px;
  font-weight: 500;
}

.song-item.playing .song-name {
  font-weight: 600;
}

/* Search Highlight */
mark.search-hit {
  background: var(--highlight-bg);
  color: var(--text-primary);
  padding: 2px 4px;
  border-radius: 4px;
  font-weight: 600;
}

/* Mini Player - Bottom Sheet Style */
.mini-player {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--player-bg);
  backdrop-filter: blur(40px) saturate(200%);
  -webkit-backdrop-filter: blur(40px) saturate(200%);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: 0 12px 48px var(--glass-shadow);
  z-index: 1000;
  padding-bottom: env(safe-area-inset-bottom);
  width: calc(100% - 32px);
  max-width: 900px;
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(100px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.mini-player-content {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  gap: 16px;
}

.control-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: none;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

.control-btn:active {
  transform: scale(0.95);
}

.control-btn.active {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}

/* Play Control */
.play-control-wrapper {
  position: relative;
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

.play-pause-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #FFFFFF;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.4);
}

.play-pause-btn:hover {
  background: var(--accent-hover);
  transform: translate(-50%, -50%) scale(1.08);
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.5);
}

.play-pause-btn:active {
  transform: translate(-50%, -50%) scale(0.95);
}

.play-icon,
.pause-icon {
  width: 24px;
  height: 24px;
}

/* Progress Ring */
.progress-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 56px;
}

.progress-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 2;
}

.progress-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dasharray 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  stroke-dasharray: 0 100;
  filter: drop-shadow(0 0 4px var(--accent));
}

/* Song Info Scroll */
.song-info-scroll {
  flex: 1;
  overflow: hidden;
  min-width: 0;
}

.song-info-content {
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  animation: scroll-text 15s linear infinite;
  color: var(--text-primary);
}

@keyframes scroll-text {
  0%, 20% {
    transform: translateX(0);
  }
  80%, 100% {
    transform: translateX(-100%);
  }
}

.song-info-scroll:hover .song-info-content {
  animation-play-state: paused;
}

/* Panels */
.recent-list-panel,
.timer-panel {
  position: fixed;
  bottom: calc(var(--player-height) + 32px);
  right: 16px;
  width: 320px;
  max-height: 420px;
  background: var(--glass-bg);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: 0 12px 48px var(--glass-shadow);
  display: none;
  flex-direction: column;
  z-index: 1001;
}

.recent-list-panel.show,
.timer-panel.show {
  display: flex;
  animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.recent-list-header,
.timer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.recent-list-header h3,
.timer-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.close-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--card-bg);
  font-size: 20px;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.close-btn:hover {
  background: var(--card-hover);
  transform: scale(1.1);
}

.recent-list {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow-y: auto;
  max-height: 340px;
}

.recent-list-item {
  padding: 12px 20px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.recent-list-item:hover {
  background: var(--card-hover);
}

.recent-list-item.playing {
  background: var(--card-hover);
  color: var(--accent);
  font-weight: 600;
}

.timer-content {
  padding: 20px;
}

.timer-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}

.timer-option-btn {
  padding: 12px 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.timer-option-btn:hover {
  background: var(--card-hover);
  transform: scale(1.02);
}

.timer-option-btn:active {
  transform: scale(0.98);
}

.timer-option-btn.active {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.timer-status {
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
  min-height: 24px;
}

.timer-cancel-btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 14px;
  background: #FF3B30;
  color: #FFFFFF;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(255, 59, 48, 0.3);
}

.timer-cancel-btn:hover {
  background: #FF2D55;
  transform: scale(1.02);
}

.timer-cancel-btn:active {
  transform: scale(0.98);
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-title {
    font-size: 18px;
  }

  .menu-bar {
    padding: 10px 12px;
  }

  .menu-btn {
    padding: 8px 16px;
    font-size: 14px;
  }

  .song-info-scroll {
    max-width: 150px;
  }

  .mini-player-content {
    padding: 12px 16px;
    gap: 12px;
  }

  .control-btn {
    width: 40px;
    height: 40px;
  }

  .play-control-wrapper {
    width: 52px;
    height: 52px;
  }

  .play-pause-btn {
    width: 44px;
    height: 44px;
  }

  .mobile-only {
    display: inline-flex;
  }

  .search-fab {
    display: flex;
  }

  .desktop-only {
    display: none;
  }

  .list-count {
    display: none;
  }

  .recent-list-panel,
  .timer-panel {
    right: 12px;
    left: 12px;
    width: auto;
    max-width: none;
  }

  li.song-item {
    padding: 12px 16px;
  }

  .song-name {
    font-size: 15px;
  }
}

/* Input Font Size Fix for iOS */
input[type="search"],
input[type="text"],
textarea,
.compact-search input {
  -webkit-text-size-adjust: 100%;
}

@media (max-width: 768px) {
  input[type="search"],
  input[type="text"],
  textarea,
  .compact-search input {
    font-size: 16px;
  }
}

/* Smooth Transitions */
* {
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}