@charset "utf-8";
@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;500;600;700&family=Noto+Sans+JP:wght@300;400;500&display=swap');

/* ============================================================
   CSS VARIABLES — Glass Dark Theme
   ============================================================ */
:root {
  --bg-base:        #0a0a0f;
  --bg-glass:       rgba(18, 18, 28, 0.72);
  --bg-glass-2:     rgba(255,255,255,0.04);
  --bg-glass-hover: rgba(255,255,255,0.07);
  --border-glass:   rgba(255,255,255,0.10);
  --border-accent:  rgba(120,180,255,0.30);
  --text-primary:   #e8eaf6;
  --text-secondary: #7b8cb0;
  --accent:         #4fc3f7;
  --accent-2:       #7c4dff;
  --accent-glow:    rgba(79,195,247,0.25);
  --playing-color:  #4fc3f7;
  --danger:         #ef5350;
  --success:        #66bb6a;
  --radius-card:    16px;
  --radius-sm:      8px;
  --blur:           blur(18px);
  --blur-sm:        blur(8px);
  --shadow-card:    0 8px 32px rgba(0,0,0,0.55), 0 1px 0 rgba(255,255,255,0.06) inset;
  --shadow-btn:     0 2px 12px rgba(79,195,247,0.2);
  --transition:     all 0.22s cubic-bezier(0.4,0,0.2,1);
}

/* Light mode — elegant translucent white */
body:not(.dark) {
  --bg-base:        #f0f4ff;
  --bg-glass:       rgba(255,255,255,0.70);
  --bg-glass-2:     rgba(0,0,0,0.03);
  --bg-glass-hover: rgba(0,0,0,0.05);
  --border-glass:   rgba(0,0,0,0.09);
  --border-accent:  rgba(79,195,247,0.35);
  --text-primary:   #1a1f36;
  --text-secondary: #6b7a9e;
  --accent:         #0288d1;
  --accent-glow:    rgba(2,136,209,0.15);
  --shadow-card:    0 8px 32px rgba(0,0,0,0.10), 0 1px 0 rgba(255,255,255,0.9) inset;
  --shadow-btn:     0 2px 10px rgba(2,136,209,0.18);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 400;
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s, color 0.4s;
}

/* Background grid removed */

body.dark::after {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(79,195,247,0.04) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(124,77,255,0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   LAYOUT WRAPPER
   ============================================================ */
.page-wrapper {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 20px 40px;
}

/* ============================================================
   GLASS CARD MIXIN
   ============================================================ */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  margin-bottom: 16px;
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  flex-wrap: wrap;
  gap: 10px;
}

.header h1 {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, var(--accent) 0%, #e8eaf6 60%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
}

body:not(.dark) .header h1 {
  background: linear-gradient(135deg, var(--accent) 0%, #1a1f36 60%);
  -webkit-background-clip: text;
  background-clip: text;
}

/* ============================================================
   BUTTONS
   ============================================================ */
button {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 8px 16px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  background: var(--bg-glass-2);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  text-transform: uppercase;
}

button:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-accent);
  color: var(--accent);
  box-shadow: var(--shadow-btn);
  transform: translateY(-1px);
}

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

/* Primary accent button */
button.btn-primary,
button[onclick="addToPlaylist()"],
button[onclick="createNewPlaylist()"],
button[onclick="savePlaylistsToServer()"],
button[onclick="saveSelectedLocalPlaylistToServer()"],
button[onclick="fetchServerPlaylists()"],
button[onclick="appendPlaylistFromServer()"],
button[onclick="saveServerPlaylistToLocalAsNew()"] {
  background: linear-gradient(135deg, rgba(79,195,247,0.18), rgba(124,77,255,0.12));
  border-color: rgba(79,195,247,0.35);
  color: var(--accent);
}

button.btn-primary:hover,
button[onclick="addToPlaylist()"]:hover,
button[onclick="createNewPlaylist()"]:hover {
  background: linear-gradient(135deg, rgba(79,195,247,0.28), rgba(124,77,255,0.20));
  box-shadow: 0 0 20px rgba(79,195,247,0.2);
}

/* Danger */
button[onclick="clearPlaylist()"],
button[onclick="deleteCurrentPlaylist()"],
button[onclick*="delete"],
button[onclick*="Delete"],
#deletePlaylistBtn {
  border-color: rgba(239,83,80,0.30);
  color: var(--danger);
}
button[onclick="clearPlaylist()"]:hover,
button[onclick="deleteCurrentPlaylist()"]:hover,
#deletePlaylistBtn:hover {
  background: rgba(239,83,80,0.12);
  border-color: rgba(239,83,80,0.5);
  box-shadow: 0 0 16px rgba(239,83,80,0.18);
}

/* ============================================================
   INPUTS & SELECTS
   ============================================================ */
input, select {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.9rem;
  padding: 9px 14px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  background: var(--bg-glass-2);
  color: var(--text-primary);
  transition: var(--transition);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  outline: none;
}

input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--bg-glass-hover);
}

select {
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234fc3f7' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

select option {
  background: #1a1a2e;
  color: #e8eaf6;
}

/* ============================================================
   PLAYLIST PANEL (top controls)
   ============================================================ */
.playlist-panel {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 16px 20px;
  margin-bottom: 12px;
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

#playlistSelect {
  flex: 1;
  min-width: 160px;
  max-width: 300px;
  font-weight: 500;
}

#newPlaylistName {
  flex: 1;
  min-width: 140px;
  max-width: 200px;
}

/* ============================================================
   CONTROL TABS
   ============================================================ */
.control-tabs {
  display: flex;
  overflow-x: auto;
  white-space: nowrap;
  gap: 6px;
  padding: 10px 14px;
  margin-bottom: 12px;
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  scrollbar-width: none;
}
.control-tabs::-webkit-scrollbar { display: none; }

.control-tabs button {
  flex-shrink: 0;
  font-size: 0.78rem;
  padding: 7px 13px;
  border-radius: 6px;
  text-transform: uppercase;
}

/* ============================================================
   CONTROL CONTENT / TABS
   ============================================================ */
.control-content {
  padding: 20px;
  margin-bottom: 16px;
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  width: 100%;
  box-sizing: border-box;
}

.tab { display: none; }
.tab.active { display: block; width: 100%; }

.tab-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  width: 100%;
}

.tab-row input,
.tab-row select {
  flex: 1;
  min-width: 160px;
}

.tab label {
  display: block;
  margin-bottom: 10px;
  color: var(--text-secondary);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
  display: block;
  margin-bottom: 10px;
  color: var(--text-secondary);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.tab-section {
  border-top: 1px solid var(--border-glass);
  padding-top: 14px;
  margin-top: 14px;
}

.tab-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

/* ============================================================
   VOLUME SLIDER
   ============================================================ */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  border-radius: 4px;
  background: var(--border-glass);
  padding: 0;
  border: none;
  backdrop-filter: none;
  width: 140px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  cursor: pointer;
  transition: transform 0.15s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

/* ============================================================
   LAYOUT — Player上部中央 + プレイリスト下部フル幅
   ============================================================ */
.main-columns {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.column-left {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
}

.column-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

/* ============================================================
   PLAYLIST CARDS
   ============================================================ */
#playlist {
  width: 100%;
  max-width: none;
  margin: 0;
}

.video-card,
.playlist-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  margin-bottom: 8px;
  background: var(--bg-glass-2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  cursor: grab;
  transition: background 0.2s, border-color 0.2s, transform 0.18s, box-shadow 0.2s;
  position: relative;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
}

.video-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: transparent;
  transition: background 0.2s;
  border-radius: 3px 0 0 3px;
}

.video-card:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-accent);
  transform: translateX(2px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3), -4px 0 0 var(--accent);
}

.video-card:hover::before {
  background: var(--accent);
}

/* Currently playing card */
.video-card.is-playing {
  background: rgba(79,195,247,0.07);
  border-color: rgba(79,195,247,0.30);
  box-shadow: 0 4px 24px rgba(79,195,247,0.12), -4px 0 0 var(--accent);
}

.video-card.is-playing::before {
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.video-card img {
  width: 72px;
  height: 54px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.4);
}

.card-info {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.card-title {
  font-size: 0.88rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.card-playing-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--playing-color);
  text-transform: uppercase;
}

/* Animated equalizer bars */
.eq-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}
.eq-bars span {
  display: block;
  width: 3px;
  background: var(--accent);
  border-radius: 1px;
  animation: eq 0.6s ease-in-out infinite alternate;
}
.eq-bars span:nth-child(1) { height: 6px; animation-delay: 0s; }
.eq-bars span:nth-child(2) { height: 12px; animation-delay: 0.1s; }
.eq-bars span:nth-child(3) { height: 8px; animation-delay: 0.2s; }
.eq-bars span:nth-child(4) { height: 10px; animation-delay: 0.05s; }

@keyframes eq {
  from { transform: scaleY(0.4); }
  to   { transform: scaleY(1); }
}

.card-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.card-actions button {
  width: 34px;
  height: 34px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.9rem;
  text-transform: none;
}

/* Drag handle icon */
.drag-handle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: grab;
  padding: 0 4px;
  flex-shrink: 0;
  opacity: 0.4;
  transition: opacity 0.15s;
}

.video-card:hover .drag-handle {
  opacity: 0.9;
}

/* ============================================================
   DRAG & SORT — mobile touch
   ============================================================ */
.playlist-card.dragging-source {
  opacity: 0.25;
  border-style: dashed;
}

.playlist-card.drag-over {
  border-color: var(--accent);
  background: rgba(79,195,247,0.06);
  box-shadow: 0 0 0 2px var(--accent-glow);
  transform: scale(1.01);
}

.dragging-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.92;
  border-radius: var(--radius-card);
  box-shadow: 0 16px 48px rgba(0,0,0,0.7), 0 0 0 2px rgba(79,195,247,0.4);
  transform-origin: center;
  transition: box-shadow 0.15s;
  background: rgba(18, 18, 28, 0.95);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid rgba(79,195,247,0.35);
}

/* Player position: bottom (playlist first, then player) */
.main-columns.player-bottom {
  flex-direction: column-reverse;
}

/* ============================================================
   PLAYER WRAPPER
   ============================================================ */
#player-wrapper {
  margin: 0;
  max-width: none;
  padding: 16px;
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

#player {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}

#player iframe,
#player > div {
  display: block;
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  border-radius: 10px;
  border: none;
}

/* ============================================================
   SECTION LABEL
   ============================================================ */
.section-label {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-glass);
}

/* ============================================================
   INFO TAB
   ============================================================ */
#playlistInfo {
  font-size: 0.9rem;
  line-height: 2;
  color: var(--text-secondary);
}

#playlistInfo strong {
  font-size: 1rem;
  color: var(--text-primary);
  font-family: 'Rajdhani', sans-serif;
  letter-spacing: 0.04em;
}

/* ============================================================
   LOGIN / USER INFO AREAS
   ============================================================ */
#tab-logininfo p,
#tab-login p {
  color: var(--text-secondary);
  margin-bottom: 12px;
}

#tab-login form {
  margin-top: 8px;
}

#loggedInUsername {
  color: var(--accent);
  font-weight: 600;
}

/* ============================================================
   HR dividers
   ============================================================ */
hr {
  border: none;
  border-top: 1px solid var(--border-glass);
  margin: 14px 0;
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-glass); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-accent); }

/* ============================================================
   RESPONSIVE — MOBILE
   ============================================================ */
@media (max-width: 900px) {
  .column-left {
    max-width: 100%;
  }
  .column-left,
  .column-right {
    gap: 12px;
  }
  #player-wrapper {
    margin-top: 0;
  }
}

@media (max-width: 640px) {
  .page-wrapper { padding: 10px 10px 60px; }

  .header { padding: 14px 16px; }
  .header h1 { font-size: 1.1rem; }

  .playlist-panel {
    padding: 12px 14px;
    gap: 8px;
  }

  #playlistSelect { max-width: none; flex: 1; }
  #newPlaylistName { max-width: none; flex: 1; }

  input, select, button {
    min-height: 40px;
  }

  .control-tabs {
    padding: 8px 10px;
    gap: 5px;
    position: sticky;
    top: 0;
    z-index: 200;
  }

  .control-tabs button {
    font-size: 0.72rem;
    padding: 6px 10px;
  }

  .control-content { padding: 14px; }

  .video-card { gap: 10px; padding: 9px 12px; }

  .video-card img {
    width: 60px;
    height: 45px;
    border-radius: 6px;
  }

  .card-title { font-size: 0.82rem; }

  .card-actions button {
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
  }

  #player-wrapper { padding: 10px; margin-top: 0; }

  /* hide drag handle on smallest screens, use long-press */
  .drag-handle { display: none; }
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.video-card {
  animation: fadeInUp 0.25s ease both;
}

/* Stagger new cards */
.video-card:nth-child(1)  { animation-delay: 0.00s; }
.video-card:nth-child(2)  { animation-delay: 0.03s; }
.video-card:nth-child(3)  { animation-delay: 0.06s; }
.video-card:nth-child(4)  { animation-delay: 0.09s; }
.video-card:nth-child(5)  { animation-delay: 0.12s; }
.video-card:nth-child(6)  { animation-delay: 0.15s; }
.video-card:nth-child(7)  { animation-delay: 0.18s; }
.video-card:nth-child(8)  { animation-delay: 0.21s; }
.video-card:nth-child(9)  { animation-delay: 0.24s; }
.video-card:nth-child(10) { animation-delay: 0.27s; }

/* ============================================================
   TOAST NOTIFICATION (replaces alert)
   ============================================================ */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 12px 20px;
  border-radius: 10px;
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  font-size: 0.88rem;
  box-shadow: 0 8px 30px rgba(0,0,0,0.5);
  animation: toastIn 0.3s cubic-bezier(0.34,1.56,0.64,1) both;
  pointer-events: auto;
  max-width: 320px;
  min-width: 200px;
}

.toast.success { border-color: rgba(102,187,106,0.4); color: var(--success); }
.toast.error   { border-color: rgba(239,83,80,0.4);  color: var(--danger); }
.toast.info    { border-color: rgba(79,195,247,0.4); color: var(--accent); }

.toast.fade-out {
  animation: toastOut 0.3s ease forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px) scale(0.9); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(20px); }
}