/* ========================================
   ゆるいむくん Music Streaming - Styles
   ======================================== */

/* CSS Variables */
:root {
  /* Colors - ピンク系・温かみのある配色 */
  --color-primary: #ff8fab;
  --color-primary-light: #ffb3c6;
  --color-primary-dark: #ff6b8a;
  --color-accent: #ffc8dd;
  --color-bg: #fff5f7;
  --color-bg-card: #ffffff;
  --color-text: #4a4a4a;
  --color-text-light: #8a8a8a;
  --color-text-dark: #2a2a2a;
  --color-border: #ffe4ec;

  /* Shadows */
  --shadow-soft: 0 4px 20px rgba(255, 143, 171, 0.15);
  --shadow-hover: 0 8px 30px rgba(255, 143, 171, 0.25);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;

  /* Spacing */
  --container-max-width: 480px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 50%;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Zen Maru Gothic', 'Hiragino Maru Gothic Pro', 'BIZ UDGothic', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  padding: var(--spacing-md);
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.logo {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-xs);
}

.tagline {
  font-size: 0.875rem;
  color: var(--color-text-light);
  letter-spacing: 0.1em;
}

/* Player Section */
.player-section {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-soft);
  margin-bottom: var(--spacing-lg);
}

/* Album Art */
.album-art-container {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-md);
}

.album-art {
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

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

.album-art-placeholder {
  font-size: 4rem;
}

/* Track Info */
.track-info {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.track-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-xs);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-artist {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* Progress Bar */
.progress-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.time-current,
.time-total {
  font-size: 0.75rem;
  color: var(--color-text-light);
  min-width: 40px;
  font-variant-numeric: tabular-nums;
}

.time-current {
  text-align: right;
}

.time-total {
  text-align: left;
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  cursor: pointer;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: 3px;
  width: 0%;
  transition: width var(--transition-fast);
}

.progress-handle {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  background: var(--color-primary-dark);
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(255, 107, 138, 0.4);
  opacity: 0;
  transition: opacity var(--transition-fast);
  left: 0%;
}

.progress-bar:hover .progress-handle,
.progress-bar.dragging .progress-handle {
  opacity: 1;
}

/* Controls */
.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.control-btn {
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.control-btn:hover {
  background: var(--color-border);
  color: var(--color-primary-dark);
}

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

.control-btn.active {
  color: var(--color-primary-dark);
}

.control-btn svg {
  width: 24px;
  height: 24px;
}

.play-btn {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(255, 107, 138, 0.4);
}

.play-btn:hover {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: white;
  transform: scale(1.05);
}

.play-btn svg {
  width: 32px;
  height: 32px;
}

/* Repeat button states */
.repeat-one::after {
  content: '1';
  position: absolute;
  font-size: 10px;
  font-weight: bold;
}

/* Volume */
.volume-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.volume-btn {
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  transition: all var(--transition-fast);
}

.volume-btn:hover {
  color: var(--color-primary-dark);
}

.volume-btn svg {
  width: 20px;
  height: 20px;
}

.volume-slider {
  width: 100px;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  cursor: pointer;
  position: relative;
}

.volume-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  width: 100%;
  transition: width var(--transition-fast);
}

.volume-handle {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 12px;
  height: 12px;
  background: var(--color-primary-dark);
  border-radius: var(--radius-full);
  box-shadow: 0 2px 6px rgba(255, 107, 138, 0.4);
  opacity: 0;
  transition: opacity var(--transition-fast);
  left: 100%;
}

.volume-slider:hover .volume-handle,
.volume-slider.dragging .volume-handle {
  opacity: 1;
}

/* Playlist Section */
.playlist-section {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-soft);
  margin-bottom: var(--spacing-lg);
}

/* Genre Filter */
.genre-filter {
  margin-bottom: var(--spacing-sm);
}

.genre-filter-header {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
}

.genre-btn {
  padding: 0.4rem 0.8rem;
  background: var(--color-border);
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.genre-btn.active {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
}

.genre-toggle-btn {
  padding: 0.4rem 0.8rem;
  background: var(--color-border);
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.genre-toggle-btn:hover {
  background: var(--color-accent);
  color: var(--color-text);
}

.genre-toggle-btn .toggle-arrow {
  transition: transform var(--transition-normal);
}

.genre-toggle-btn.expanded .toggle-arrow {
  transform: rotate(180deg);
}

.genre-list {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.3s ease, opacity 0.2s ease, margin-top 0.3s ease;
}

.genre-list.expanded {
  max-height: 400px;
  opacity: 1;
  margin-top: var(--spacing-xs);
}

.genre-list .genre-btn {
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Genre Sections */
.genre-section {
  margin-bottom: var(--spacing-sm);
}

.genre-section:last-child {
  margin-bottom: 0;
}

.genre-section-header {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xs);
  padding-left: 2px;
}

.genre-section-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--spacing-xs);
}

/* Vocal genre styling */
.genre-section-vocal .genre-section-header {
  color: #7c9fd6;
}

.genre-btn-vocal {
  background: #e8f0fd;
  color: #4a6fa5;
}

.genre-btn-vocal:hover {
  background: #d0e2f7;
}

.genre-btn-vocal.active {
  background: linear-gradient(135deg, #6b9bd1 0%, #4a7ab8 100%);
  color: white;
}

/* Play Mode Buttons */
.play-mode {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.play-mode-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 0.8rem;
  background: var(--color-border);
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.play-mode-btn:hover {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}

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

.play-mode-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.playlist-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-xs);
}

.playlist {
  list-style: none;
  max-height: 300px;
  overflow-y: auto;
}

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

.playlist::-webkit-scrollbar-track {
  background: var(--color-border);
  border-radius: 3px;
}

.playlist::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: 3px;
}

.playlist-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.playlist-item:hover {
  background: var(--color-border);
}

.playlist-item.active {
  background: linear-gradient(90deg, var(--color-accent) 0%, rgba(255, 200, 221, 0) 100%);
}

.playlist-item.playing .playlist-item-icon {
  color: var(--color-primary-dark);
}

.playlist-item-icon {
  width: 32px;
  height: 32px;
  margin-right: var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 0.875rem;
}

.playlist-item-info {
  flex: 1;
  min-width: 0;
}

.playlist-item-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-dark);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.playlist-item-duration {
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-left: var(--spacing-sm);
}

/* Playing animation */
.playlist-item.playing .playlist-item-icon::before {
  content: '';
  display: flex;
  gap: 2px;
}

.playing-indicator {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 16px;
}

.playing-indicator span {
  width: 3px;
  background: var(--color-primary-dark);
  animation: playing 0.8s ease-in-out infinite;
}

.playing-indicator span:nth-child(1) { animation-delay: 0s; }
.playing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.playing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes playing {
  0%, 100% { height: 4px; }
  50% { height: 16px; }
}

/* Subscribe Section */
.subscribe-section {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-soft);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.subscribe-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

.subscribe-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.subscribe-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.subscribe-link:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.subscribe-icon {
  font-size: 1.25rem;
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--spacing-md);
  color: var(--color-text-light);
  font-size: 0.75rem;
}

.footer-legal {
  margin-bottom: var(--spacing-sm);
}

.legal-toggle {
  background: none;
  border: none;
  color: var(--color-primary-dark);
  font-family: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  transition: all var(--transition-fast);
}

.legal-toggle:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.legal-toggle.active {
  font-weight: 500;
}

.legal-divider {
  color: var(--color-border);
  margin: 0 0.25rem;
}

.legal-content {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  background: var(--color-bg-card);
  border-radius: var(--radius-sm);
  margin-bottom: 0;
  transition: max-height 0.3s ease, opacity 0.2s ease, margin-bottom 0.3s ease, padding 0.3s ease;
}

.legal-content.expanded {
  max-height: 300px;
  opacity: 1;
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm);
}

.legal-content h4 {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-xs);
}

.legal-content ul {
  list-style: none;
  text-align: left;
  font-size: 0.7rem;
  line-height: 1.6;
}

.legal-content li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.25rem;
}

.legal-content li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

.copyright {
  margin-top: var(--spacing-xs);
}

/* Responsive */
@media (max-width: 480px) {
  body {
    padding: var(--spacing-sm);
  }

  .player-section {
    padding: var(--spacing-md);
  }

  .album-art {
    width: 160px;
    height: 160px;
  }

  .album-art-placeholder {
    font-size: 3rem;
  }

  .track-title {
    font-size: 1.125rem;
  }

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

  .play-btn {
    width: 56px;
    height: 56px;
  }

  .play-btn svg {
    width: 28px;
    height: 28px;
  }

  .volume-slider {
    width: 80px;
  }
}

/* Loading state */
.loading .album-art {
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* Error state */
.error .track-title {
  color: #ff6b6b;
}

/* Keyboard focus styles */
.control-btn:focus-visible,
.volume-btn:focus-visible,
.playlist-item:focus-visible,
.subscribe-link:focus-visible {
  outline: 2px solid var(--color-primary-dark);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background: var(--color-primary-light);
  color: var(--color-text-dark);
}

/* About Section */
.about-section {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-soft);
  margin-bottom: var(--spacing-lg);
}

.about-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.about-content {
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.8;
}

.about-content p {
  margin-bottom: var(--spacing-sm);
}

.about-content p:last-child {
  margin-bottom: 0;
}

.about-note {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: var(--spacing-sm);
}

/* Track Description */
.track-description {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: var(--spacing-sm);
  line-height: 1.6;
  max-height: 60px;
  overflow-y: auto;
  padding: 0 var(--spacing-sm);
}

.track-description:empty {
  display: none;
}

.track-description::-webkit-scrollbar {
  width: 4px;
}

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

.track-description::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}

/* Header Navigation */
.header-nav {
  margin-top: var(--spacing-sm);
}

.header-nav-link {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px rgba(255, 107, 138, 0.3);
}

.header-nav-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 107, 138, 0.4);
}


/* Main List Filter */
.main-list-filter {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  justify-content: center;
}

.main-list-btn {
  padding: 0.75rem 1.5rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.main-list-btn:hover {
  border-color: var(--color-primary-light);
  background: var(--color-bg-hover);
}

.main-list-btn.active {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-color: var(--color-primary);
  color: white;
  box-shadow: 0 2px 8px rgba(255, 107, 138, 0.3);
}