* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  background: #f5f5f5;
  color: #333;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

h1 {
  font-size: 2rem;
  margin-bottom: 10px;
}

button {
  padding: 10px 20px;
  font-size: 1rem;
  background: #333;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: #555;
}

#palette-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 15px;
  width: 100%;
  max-width: 900px;
}

.color-card {
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  text-align: center;
  transition: transform 0.2s ease;
}

.color-card:hover {
  transform: scale(1.05);
}

.color {
  height: 120px;
  width: 100%;
}

.hex {
  background: #fff;
  padding: 8px;
  font-weight: bold;
  font-size: 0.9rem;
  border-top: 1px solid #ddd;
  user-select: all;
}