* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  /* ダブルタップによる拡大を防ぐ */
  touch-action: manipulation;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu,
    Cantarell, sans-serif;
  background: linear-gradient(135deg, #1a0033 0%, #330066 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
}

.container {
  background: rgba(0, 0, 0, 0.8);
  border: 2px solid #6b46c1;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(107, 70, 193, 0.3);
  padding: 40px;
  max-width: 900px;
  width: 100%;
  color: white;
  position: relative;
  z-index: 1;
}

h1 {
  color: #e9d5ff;
  text-align: center;
  margin-bottom: 30px;
  font-size: 2.5em;
  text-shadow: 0 0 20px rgba(233, 213, 255, 0.5);
}

.subtitle {
  text-align: center;
  color: #c084fc;
  margin-bottom: 30px;
  font-size: 1.2em;
}

.back-to-top {
  text-align: center;
  margin-bottom: 20px;
}

.back-to-top a {
  color: #c084fc;
  text-decoration: none;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color 0.3s ease;
}

.back-to-top a:hover {
  color: #e9d5ff;
}

.button-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin: 15px;
  flex-wrap: wrap;
}

button {
  background: linear-gradient(45deg, #6b46c1, #9333ea);
  color: white;
  border: none;
  padding: 12px 30px;
  border-radius: 30px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.6s;
}

button:hover::before {
  left: 100%;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(147, 51, 234, 0.4);
}

.download-button {
  background: linear-gradient(45deg, #059669, #10b981);
}

.download-button:hover {
  box-shadow: 0 5px 15px rgba(16, 185, 129, 0.4);
}

.legendary-button {
  background: linear-gradient(45deg, #dc2626, #ef4444);
}

.legendary-button:hover {
  box-shadow: 0 5px 15px rgba(239, 68, 68, 0.4);
}

.id-controls {
  margin: 20px 0;
  text-align: center;
}

.id-controls-inner {
  display: flex;
  gap: 10px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

#idInput {
  padding: 10px;
  width: 200px;
  border-radius: 5px;
  border: 1px solid #6b46c1;
  background: rgba(0, 0, 0, 0.5);
  color: white;
  font-size: 16px;
}

.generate-button {
  background: linear-gradient(45deg, #059669, #10b981);
}

.nav-button {
  background: linear-gradient(45deg, #3b82f6, #60a5fa);
}

.nav-buttons {
  display: flex;
  gap: 5px;
}

.metadata-display {
  background: rgba(107, 70, 193, 0.1);
  border-radius: 15px;
  padding: 30px;
  margin-top: 20px;
  display: none;
  border: 1px solid rgba(107, 70, 193, 0.3);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.metadata-display.show {
  display: block;
}

.metadata-image-container {
  width: 200px;
  height: 200px;
  margin: 20px auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.metadata-image {
  width: 200px;
  height: 200px;
  border-radius: 10px;
  margin: 0;
  display: block;
  box-shadow: 0 0 20px rgba(147, 51, 234, 0.5);
}

.metadata-header {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  justify-content: center;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.metadata-name {
  font-size: 1.8em;
  font-weight: bold;
  color: #e9d5ff;
  margin-bottom: 0;
  text-align: center;
}

.special-badge {
  background: linear-gradient(45deg, #ffd700, #ffa500);
  color: #1a0033;
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.8em;
  font-weight: bold;
  margin-bottom: 5px;
}

.legendary-badge {
  background: linear-gradient(45deg, #dc2626, #ef4444);
  color: white;
}

.copy-link-button {
  background: linear-gradient(45deg, #8b5cf6, #a78bfa);
  padding: 5px 15px;
  font-size: 14px;
  margin-bottom: 3px;
}

.metadata-description {
  color: #e9d5ff;
  line-height: 1.8;
  margin-bottom: 20px;
  text-align: center;
  font-size: 1.1em;
  font-style: italic;
  padding: 0 20px;
}

.attributes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.attribute {
  background: rgba(147, 51, 234, 0.2);
  padding: 10px;
  border-radius: 8px;
  text-align: center;
  border: 1px solid rgba(147, 51, 234, 0.3);
}

.attribute-type {
  font-size: 0.9em;
  color: #c084fc;
}

.attribute-value {
  font-weight: bold;
  color: #e9d5ff;
}

.metadata-display.rarity-legendary {
  background: linear-gradient(
    45deg,
    rgba(220, 38, 38, 0.3),
    rgba(239, 68, 68, 0.3)
  );
  border-color: #ef4444;
}

.metadata-display.rarity-epic {
  background: linear-gradient(
    45deg,
    rgba(147, 51, 234, 0.3),
    rgba(167, 139, 250, 0.3)
  );
  border-color: #a78bfa;
}

.metadata-display.rarity-rare {
  background: linear-gradient(
    45deg,
    rgba(59, 130, 246, 0.3),
    rgba(96, 165, 250, 0.3)
  );
  border-color: #60a5fa;
}

.json-display {
  background: #1e293b;
  color: #e2e8f0;
  padding: 20px;
  border-radius: 10px;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.6;
  margin-top: 20px;
  position: relative;
}

.json-container {
  margin-top: 20px;
}

.json-toggle {
  background: #1f2937;
  border: 1px solid #374151;
  padding: 10px 15px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.3s;
}

.json-toggle:hover {
  background: #374151;
  border-color: #4b5563;
}

.toggle-icon {
  display: inline-block;
  transition: transform 0.3s;
  margin-right: 8px;
  font-size: 12px;
}

.json-toggle.open .toggle-icon {
  transform: rotate(90deg);
}

.copy-json-button {
  background: #374151;
  color: #d1d5db;
  border: 1px solid #4b5563;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  cursor: pointer;
  margin-left: 4px;
}

.copy-json-button:hover {
  background: #4b5563;
  color: white;
}

.legendary-ids {
  margin-top: 30px;
  padding: 20px;
  background: rgba(220, 38, 38, 0.1);
  border-radius: 10px;
  border: 1px solid rgba(220, 38, 38, 0.3);
}

.legendary-ids h3 {
  color: #ef4444;
  margin-bottom: 10px;
}

.legendary-ids-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.legendary-id-button {
  background: rgba(220, 38, 38, 0.3);
  border: 1px solid #ef4444;
  padding: 5px 15px;
  border-radius: 20px;
  color: #fca5a5;
  cursor: pointer;
  transition: all 0.3s;
}

.legendary-id-button:hover {
  background: rgba(220, 38, 38, 0.5);
  color: white;
}

pre {
  margin: 0;
}

/* Mobile styles */
@media (max-width: 768px) {
  body {
    padding: 10px;
    padding-bottom: 80px; /* スペースを確保 */
  }

  .container {
    padding: 20px;
    padding-bottom: 30px; /* 下部固定コントロール用のスペース */
    border-radius: 15px;
  }

  /* ID入力とPrev/Nextを画面下部に固定 */
  .id-controls {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(
      to top,
      rgba(0, 0, 0, 0.95),
      rgba(0, 0, 0, 0.9)
    );
    border-top: 2px solid #6b46c1;
    padding: 12px 10px;
    margin: 0;
    z-index: 1000;
    box-shadow: 0 -4px 20px rgba(107, 70, 193, 0.4);
  }

  .id-controls-inner {
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
    max-width: 100%;
  }

  h1 {
    font-size: 1.2em;
    margin-bottom: 14px;
  }

  .subtitle {
    font-size: 1em;
    margin-bottom: 20px;
  }

  .button-group {
    gap: 10px;
    margin: 20px 0;
  }

  button {
    padding: 7px 15px;
    font-size: 14px;
  }

  #idInput {
    width: 100px;
    padding: 12px 15px;
    font-size: 13px;
    border-radius: 30px;
  }

  .id-controls .generate-button,
  .id-controls .nav-button {
    padding: 12px 18px;
    font-size: 14px;
    white-space: nowrap;
  }

  .id-controls .nav-buttons {
    display: flex;
    gap: 6px;
  }

  .metadata-display {
    padding: 15px;
  }

  .metadata-image {
    width: 100%;
    height: 100%;
    margin: 15px auto;
  }

  .metadata-name {
    font-size: 1.4em;
  }

  .metadata-description {
    font-size: 1em;
    padding: 0 10px;
    margin-bottom: 15px;
  }

  .attributes {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 8px;
  }

  .attribute {
    padding: 8px;
  }

  .attribute-type {
    font-size: 0.8em;
  }

  .attribute-value {
    font-size: 0.9em;
  }

  .legendary-ids {
    padding: 15px;
    margin-top: 20px;
  }

  .legendary-ids-list {
    gap: 8px;
  }

  .legendary-id-button {
    padding: 4px 12px;
    font-size: 12px;
  }

  .special-badge {
    padding: 4px 10px;
    font-size: 0.7em;
  }

  .copy-link-button {
    padding: 4px 10px;
    font-size: 12px;
  }

  .json-display {
    padding: 15px;
    font-size: 12px;
  }

  .json-toggle {
    padding: 8px 12px;
  }
}