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

:root {
  --bg-dark: #0a0a0f;
  --bg-card: #1a1a24;
  --bg-hover: #242433;
  --accent-primary: #ff3366;
  --accent-secondary: #00d9ff;
  --accent-glow: rgba(255, 51, 102, 0.3);
  --text-primary: #ffffff;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b7f;
  --border: #2a2a3a;
  --success: #00ff88;
  --danger: #ff3366;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  overflow-x: hidden;
}

.loading-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  font-size: 1.5rem;
  color: var(--accent-primary);
}

/* ============ LOGIN PAGE ============ */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0a0a0f 0%, #1a0a1f 100%);
}

.login-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 20s ease-in-out infinite;
}

.blob-1 {
  width: 400px;
  height: 400px;
  background: var(--accent-primary);
  top: -100px;
  left: -100px;
  animation-delay: 0s;
}

.blob-2 {
  width: 500px;
  height: 500px;
  background: var(--accent-secondary);
  bottom: -150px;
  right: -150px;
  animation-delay: 5s;
}

.blob-3 {
  width: 300px;
  height: 300px;
  background: #9d00ff;
  top: 50%;
  left: 50%;
  animation-delay: 10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -50px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

.login-container {
  background: rgba(26, 26, 36, 0.8);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 3rem 2.5rem;
  width: 420px;
  max-width: 90%;
  position: relative;
  z-index: 1;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.login-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.login-title {
  font-family: 'Archivo Black', sans-serif;
  font-size: 3rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
  margin-bottom: 0.5rem;
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  letter-spacing: 0.5px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: 'DM Sans', sans-serif;
  transition: all 0.3s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), #ff5588);
  border: none;
  border-radius: 12px;
  padding: 1rem 2rem;
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'DM Sans', sans-serif;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--accent-glow);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.error-message {
  background: rgba(255, 51, 102, 0.1);
  border: 1px solid var(--accent-primary);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--accent-primary);
  font-size: 0.9rem;
  text-align: center;
}

/* ============ APP LAYOUT ============ */
.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-title {
  font-family: 'Archivo Black', sans-serif;
  font-size: 1.8rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-badge {
  background: var(--bg-dark);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 1rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'DM Sans', sans-serif;
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--accent-primary);
}

/* ============ MAIN CONTENT ============ */
.main-content {
  display: flex;
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.sidebar {
  width: 280px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 2rem 1.5rem;
  overflow-y: auto;
  height: calc(100vh - 90px);
}

.sidebar-section {
  margin-bottom: 2rem;
}

.sidebar-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-weight: 600;
}

.playlists-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.playlist-item {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.playlist-info {
  flex: 1;
}

.playlist-name {
  display: block;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.playlist-count {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.playlist-delete {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0.25rem 0.5rem;
  transition: all 0.3s ease;
}

.playlist-delete:hover {
  color: var(--danger);
}

.content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
  height: calc(100vh - 90px);
}

/* ============ SEARCH ============ */
.search-form {
  margin-bottom: 2rem;
}

.search-container {
  display: flex;
  gap: 1rem;
  max-width: 600px;
}

.search-input {
  flex: 1;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: 50px;
  padding: 1rem 1.5rem;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: 'DM Sans', sans-serif;
  transition: all 0.3s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.search-button {
  background: linear-gradient(135deg, var(--accent-primary), #ff5588);
  border: none;
  border-radius: 50px;
  padding: 1rem 2rem;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  min-width: 60px;
}

.search-button:hover:not(:disabled) {
  transform: scale(1.05);
  box-shadow: 0 10px 30px var(--accent-glow);
}

.search-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ============ RESULTS GRID ============ */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-primary);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.video-thumbnail {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
  overflow: hidden;
}

.video-thumbnail img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(255, 51, 102, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  opacity: 0;
  transition: all 0.3s ease;
}

.video-card:hover .play-overlay {
  opacity: 1;
}

.video-info {
  padding: 1rem;
}

.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-channel {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.video-actions {
  padding: 0 1rem 1rem;
}

.btn-icon {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 1rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
}

.btn-icon:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* ============ MUSIC PLAYER ============ */
.player-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease;
}

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

.player-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 3rem;
  max-width: 500px;
  width: 90%;
  position: relative;
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.8);
}

.player-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.player-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.player-artwork {
  position: relative;
  width: 100%;
  padding-top: 100%;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 2rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.player-artwork img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.artwork-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
  opacity: 0.3;
  animation: rotate 10s linear infinite;
  pointer-events: none;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.player-info {
  text-align: center;
  margin-bottom: 2rem;
}

.player-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.player-artist {
  font-size: 1rem;
  color: var(--text-secondary);
}

.player-loading {
  text-align: center;
  color: var(--accent-primary);
  padding: 2rem;
  font-size: 1.1rem;
}

.player-progress {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.time-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  min-width: 40px;
}

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

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 3px;
  transition: width 0.1s linear;
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.player-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.control-btn {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
}

.control-btn:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--accent-primary);
  transform: scale(1.1);
}

.control-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.control-btn-main {
  width: 70px;
  height: 70px;
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--accent-primary), #ff5588);
  border: none;
}

.control-btn-main:hover {
  transform: scale(1.15);
  box-shadow: 0 10px 30px var(--accent-glow);
}

.player-volume {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.volume-icon {
  font-size: 1.2rem;
}

.volume-slider {
  flex: 1;
  height: 4px;
  background: var(--bg-dark);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  -webkit-appearance: none;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent-primary);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--accent-primary);
  border-radius: 50%;
  border: none;
  cursor: pointer;
}

/* ============ MODALS ============ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: fadeIn 0.3s ease;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}

.admin-modal {
  max-width: 600px;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.modal-section {
  margin-bottom: 2rem;
}

.modal-section h3 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.modal-form,
.admin-form {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.playlists-select {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.playlist-select-item {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: left;
  font-family: 'DM Sans', sans-serif;
}

.playlist-select-item:hover {
  background: var(--bg-hover);
  border-color: var(--accent-primary);
}

.users-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 300px;
  overflow-y: auto;
}

.user-item {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-name {
  font-weight: 500;
  color: var(--text-primary);
}

.admin-badge {
  background: var(--accent-primary);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-danger {
  background: transparent;
  border: 1px solid var(--danger);
  border-radius: 6px;
  padding: 0.5rem 1rem;
  color: var(--danger);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
}

.btn-danger:hover {
  background: var(--danger);
  color: white;
}

.playlist-view {
  margin-bottom: 2rem;
}

.btn-back {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 1rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'DM Sans', sans-serif;
  margin-bottom: 1rem;
}

.btn-back:hover {
  background: var(--bg-hover);
  border-color: var(--accent-primary);
}

.playlist-view-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .main-content {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  
  .content {
    height: auto;
  }
  
  .results-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
  }
  
  .player-container {
    padding: 2rem 1.5rem;
  }
}