body{
  background: linear-gradient(135deg,#0b0d2b,#001d4d);
  color:#fff;
  font-family:'Segoe UI', system-ui, -apple-system, sans-serif;
  margin:0;
  min-height:100vh;
  padding:0;
  line-height:1.6;
}
form{
  background:rgba(255,255,255,0.1);
  padding:2rem;
  border-radius:8px;
}
button,input[type=file]{
  font-size:1rem;
  padding:0.6rem 1.2rem;
  border:none;
  border-radius:4px;
  background:#1db954;
  color:#fff;
  cursor:pointer;
  transition:background-color .3s ease,transform .2s ease;
}
button:hover,input[type=file]:hover{
  background:#1ed760;
  transform:scale(1.05);
}
.chart{
  width:90%;
  max-width:800px;
  margin:2rem auto;
}
canvas,svg{
  background:#fff;
  border-radius:8px;
}
#reset{
  display:block;
  margin:1rem auto;
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{
    transition:none !important;
    animation-duration:0.001ms !important;
    animation-iteration-count:1 !important;
  }
}

/* Modal Styles */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.show {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  width: 90%;
  max-width: 500px;
  background-color: #121212;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  transform: translateY(20px);
  opacity: 0;
  transition: transform 0.5s cubic-bezier(0.19, 1, 0.22, 1), 
              opacity 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}

.modal-content.animate-in {
  transform: translateY(0);
  opacity: 1;
}

.modal-header {
  padding: 24px;
  background: linear-gradient(135deg, #1DB954, #1ED760);
  color: white;
  text-align: center;
}

.modal-header h2 {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 700;
}

.modal-header p {
  margin: 0;
  font-size: 16px;
  opacity: 0.9;
}

.modal-body {
  padding: 24px;
  color: white;
}

.login-options {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.spotify-login-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: #1DB954;
  color: white;
  border: none;
  border-radius: 30px;
  padding: 14px 20px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.spotify-login-button:hover {
  background-color: #1ED760;
  transform: translateY(-2px);
}

.spotify-login-button svg {
  width: 24px;
  height: 24px;
}

.manual-upload-button {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 30px;
  padding: 14px 20px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.manual-upload-button:hover {
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

.separator {
  display: flex;
  align-items: center;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  margin: 8px 0;
}

.separator::before,
.separator::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.separator span {
  padding: 0 10px;
  font-size: 14px;
}

.privacy-note {
  margin-top: 24px;
  text-align: center;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.privacy-note a {
  color: #1DB954;
  text-decoration: none;
}

.privacy-note a:hover {
  text-decoration: underline;
}

/* Container and Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* Service Cards */
.service-card {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 12px;
  padding: 24px;
  margin: 12px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  color: #fff;
}

.service-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.service-configured {
  border-color: #1db954;
  background: rgba(29,185,84,0.1);
}

.service-error {
  border-color: #ff4444;
  background: rgba(255,68,68,0.1);
}

.status-indicator {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 8px;
}

.status-ok { 
  background-color: #1db954; 
  box-shadow: 0 0 8px rgba(29,185,84,0.5);
}

.status-error { 
  background-color: #ff4444; 
  box-shadow: 0 0 8px rgba(255,68,68,0.5);
}

.instructions {
  margin-top: 30px;
  padding: 20px;
  background: rgba(255,255,255,0.1);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
}

.instructions h4 {
  color: #1db954;
  margin-bottom: 15px;
}

.instructions ul {
  text-align: left;
  color: rgba(255,255,255,0.9);
}

.instructions a {
  color: #1db954;
  text-decoration: none;
}

.instructions a:hover {
  text-decoration: underline;
}

/* Dashboard Styles */
.data-source {
  background: rgba(29,185,84,0.1);
  border: 1px solid rgba(29,185,84,0.3);
  padding: 15px;
  border-radius: 12px;
  margin-bottom: 25px;
  text-align: center;
  backdrop-filter: blur(10px);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin: 25px 0;
}

.stat-card {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 20px;
  border-radius: 12px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: transform 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
}

.stat-number {
  font-size: 28px;
  font-weight: bold;
  color: #1db954;
  text-shadow: 0 0 10px rgba(29,185,84,0.3);
}

.data-section {
  margin: 30px 0;
  padding: 25px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 12px;
  backdrop-filter: blur(10px);
}

.data-section h3 {
  color: #1db954;
  margin-bottom: 20px;
  font-size: 20px;
}

.track-list {
  max-height: 400px;
  overflow-y: auto;
  background: rgba(0,0,0,0.3);
  border-radius: 8px;
  padding: 15px;
  border: 1px solid rgba(255,255,255,0.1);
}

.track-item {
  padding: 12px 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease;
}

.track-item:hover {
  background: rgba(255,255,255,0.05);
}

.track-item:last-child {
  border-bottom: none;
}

/* Custom scrollbar for webkit browsers */
.track-list::-webkit-scrollbar {
  width: 8px;
}

.track-list::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
}

.track-list::-webkit-scrollbar-thumb {
  background: rgba(29,185,84,0.6);
  border-radius: 4px;
}

.track-list::-webkit-scrollbar-thumb:hover {
  background: rgba(29,185,84,0.8);
}