:root {
  --color-bg-base: #0f172a;
  --color-bg-surface: #1e293b;
  --color-bg-hover: #334155;
  --color-text-primary: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-accent: #38bdf8;
  --color-success: #22c55e;
  --color-border: rgba(148, 163, 184, 0.2);
}

@media (prefers-color-scheme: light) {
  :root {
      --color-bg-base: #ffffff;
      --color-bg-surface: #f8fafc;
      --color-bg-hover: #e2e8f0;
      --color-text-primary: #0f172a;
      --color-text-secondary: #475569;
      --color-text-muted: #64748b;
      --color-accent: #0284c7;
      --color-success: #16a34a;
      --color-border: rgba(100, 116, 139, 0.2);
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  background: var(--color-bg-base);
  color: var(--color-text-primary);
  line-height: 1.6;
  padding: 20px;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

h1 {
  font-size: 2rem;
  margin-bottom: 10px;
  color: var(--color-accent);
}

.subtitle {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.bookmarklet-item {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  transition: box-shadow 0.2s ease;
}

.bookmarklet-item:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.bookmarklet-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 15px;
  gap: 15px;
}

.bookmarklet-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.bookmarklet-description {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 15px;
}

.code-container {
  position: relative;
  background: var(--color-bg-base);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 15px;
  overflow-x: auto;
}

.code-block {
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.5;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 5px;
}

.copy-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(56, 189, 248, 0.3);
}

.copy-btn:active {
  transform: translateY(0);
}

.copy-btn.success {
  background: var(--color-success);
}

.add-section {
  text-align: center;
  margin-top: 40px;
  padding: 30px;
  background: var(--color-bg-surface);
  border: 2px dashed var(--color-border);
  border-radius: 12px;
}

.add-btn {
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.add-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(56, 189, 248, 0.4);
}

.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-border), transparent);
  margin: 30px 0;
}

@media (max-width: 768px) {
  body {
      padding: 15px;
  }

  h1 {
      font-size: 1.5rem;
  }

  .bookmarklet-item {
      padding: 15px;
  }

  .bookmarklet-header {
      flex-direction: column;
      gap: 10px;
  }

  .bookmarklet-title {
      font-size: 1.1rem;
  }

  .code-block {
      font-size: 0.75rem;
  }

  .copy-btn {
      position: static;
      width: 100%;
      margin-top: 10px;
      justify-content: center;
  }
}

.icon {
  width: 16px;
  height: 16px;
}