:root {
  --bg: #f5f5f7;
  --card-bg: #ffffff;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --accent: #0066cc;
  --radius: 18px;
}

body {
  background-color: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 20px;
}

h1 {
  font-size: 48px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 40px;
}

#stack-list {
  width: 100%;
  max-width: 500px;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.stack-item {
  display: flex;
  justify-content: space-between;
  padding: 20px;
  border-bottom: 1px solid #f2f2f7;
}

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

.category { font-weight: 500; color: var(--text-secondary); font-size: 14px; }
.tool { font-weight: 600; color: var(--text-primary); }