:root {
  --primary-color: #7F006E;
  --secondary-color: #FF7FED;
  --spotify-green: #1DB954;
  --bg-gradient: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  --text-color: #e0e0e0;
  --tool-bg: #2a2a2a;
  --shadow-color: rgba(0, 0, 0, 0.5);
  --footer-color: rgba(0, 0, 0, 0.8);
  --border-color: #444;
  --card-bg: #1e1e1e;
  --card-header-bg: #252525;
  --label-color: #888;
  --button-hover: #CC65B5;
  --highlight: #333333;
  --success: #1DB954;
  --danger: #f44336;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 20px 70px 20px;
  min-height: 100vh;
  overflow-x: hidden;
  touch-action: manipulation;
  line-height: 1.6;
}

h1 {
  font-size: 2.5em;
  margin-bottom: 30px;
  text-align: center;
  color: var(--secondary-color);
  font-weight: 700;
  letter-spacing: -0.5px;
  text-shadow: 2px 2px 6px rgba(255, 127, 237, 0.66);
}

nav {
  display: flex;
  gap: 8px;
  margin-bottom: 25px;
  width: 100%;
  max-width: none;
  justify-content: flex-end;
  flex-wrap: wrap;
  position: absolute;
  top: 20px;
  right: 20px;
  width: auto;
}

.tab {
  cursor: pointer;
  padding: 10px 16px;
  background: var(--card-bg);
  color: var(--text-color);
  font-size: 0.95rem;
  border-radius: 8px;
  transition: all 0.2s ease;
  border: 1px solid var(--border-color);
  font-weight: 500;
}

.tab:hover {
  background: var(--highlight);
}

.tab.active {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-color: var(--primary-color);
}

.tab-content {
  display: none;
  width: 100%;
  max-width: 500px;
  animation: fadeIn 0.3s ease forwards;
  opacity: 0;
}

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

.tab-content.active {
  display: block;
}

#score-container {
  position: relative;
  margin: 25px 0;
  text-align: center;
}

#score {
  font-size: 3rem;
  font-weight: 700;
  color: var(--secondary-color);
  transition: transform 0.1s ease;
}

.score-change {
  position: absolute;
  right: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--success);
  opacity: 0;
  transform: translateY(10px);
  animation: scoreFloat 1s ease-out forwards;
}

@keyframes scoreFloat {
  0% { opacity: 0; transform: translateY(10px); }
  20% { opacity: 1; transform: translateY(0); }
  80% { opacity: 1; }
  100% { opacity: 0; transform: translateY(-20px); }
}

.button {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  padding: 1rem 2rem;
  font-size: 1.2rem;
  cursor: pointer;
  border-radius: 12px;
  margin: 15px auto;
  transition: all 0.3s ease;
  font-weight: 600;
  width: 100%;
  max-width: 300px;
  box-shadow: 0 2px 4px var(--shadow-color);
  display: block;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow-color);
}

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

.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: 12px;
  margin: 12px 0;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 6px var(--shadow-color);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px var(--shadow-color);
}

.card:active {
  transform: translateY(0);
}

.card.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  filter: grayscale(0.5);
}

.card.disabled:hover {
  transform: none !important;
  box-shadow: 0 4px 6px var(--shadow-color) !important;
}

.stats-line {
  margin: 10px 0;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
}

.stats-line strong {
  font-weight: 500;
  color: var(--text-color);
}

.toggle {
  margin: 15px 0;
  cursor: pointer;
  font-size: 1rem;
  padding: 12px;
  border-radius: 8px;
  transition: all 0.2s ease;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.toggle:hover {
  background: var(--highlight);
}

footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 15px 0;
  background-color: var(--footer-color);
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 14px;
  color: var(--text-color);
  z-index: 100;
}

footer a {
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: bold;
}

footer a:hover {
  text-decoration: underline;
}

.heart {
  color: #ff0000;
  animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.prestige {
  margin-top: 25px;
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.prestige:hover {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

.progress-container {
  height: 6px;
  background: var(--highlight);
  border-radius: 3px;
  margin-top: 10px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  width: 0%;
  transition: width 0.3s ease;
}

.achievement {
  background: var(--card-header-bg);
  color: var(--text-color);
  padding: 12px;
  border-radius: 8px;
  margin: 12px 0;
  font-weight: 500;
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 4px var(--shadow-color);
}

.achievement.locked {
  background: var(--card-bg);
  color: var(--label-color);
  opacity: 0.7;
}

#notifications {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 300px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.notification {
  background: var(--card-header-bg);
  color: var(--text-color);
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 10px;
  animation: slideIn 0.3s ease forwards;
  border-left: 4px solid var(--spotify-green);
  box-shadow: 0 3px 6px var(--shadow-color);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Share Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.modal.active {
  display: flex;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
}

.modal-content {
  position: relative;
  background: var(--tool-bg);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 30px;
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.3s ease;
  z-index: 2001;
}

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

.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  background: transparent;
  border: none;
  color: var(--text-color);
  font-size: 2rem;
  cursor: pointer;
  padding: 0;
  width: 35px;
  height: 35px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.modal-close:hover {
  background: var(--highlight);
  color: var(--secondary-color);
}

.share-variants {
  display: flex;
  gap: 8px;
  margin-bottom: 15px;
  flex-wrap: wrap;
}

.share-variant-btn {
  flex: 1;
  min-width: 100px;
  padding: 10px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.share-variant-btn:hover {
  background: var(--highlight);
}

.share-variant-btn.active {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-color: var(--primary-color);
}

.share-textarea {
  width: 100%;
  min-height: 120px;
  padding: 15px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-color);
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
  margin-bottom: 15px;
}

.share-textarea:focus {
  outline: none;
  border-color: var(--secondary-color);
}

.share-buttons {
  margin-bottom: 20px;
}

.social-share {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

.social-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.social-btn {
  padding: 12px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s ease;
  color: white;
}

.social-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.social-btn.twitter {
  background: #000000;
}

.social-btn.whatsapp {
  background: #25D366;
}

.social-btn.telegram {
  background: #0088cc;
}

.social-btn.facebook {
  background: #1877F2;
}

.copy-feedback {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--spotify-green);
  color: white;
  padding: 15px 25px;
  border-radius: 8px;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 3000;
}

.copy-feedback.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  nav {
    position: relative;
    top: auto;
    right: auto;
    width: 100%;
    justify-content: center;
    margin-bottom: 25px;
  }

  h1 {
    font-size: 2em;
  }

  .button {
    padding: 0.9rem 1.5rem;
    font-size: 1.1rem;
  }

  .tab {
    padding: 8px 12px;
    font-size: 0.9rem;
  }

  #score {
    font-size: 2.5rem;
  }

  #notifications {
    width: calc(100% - 40px);
    left: 20px;
    right: 20px;
  }

  .modal-content {
    padding: 20px;
    width: 95%;
  }

  .social-buttons {
    grid-template-columns: 1fr;
  }
}