:root {
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --shadow: 0 10px 30px rgba(0,0,0,0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.board {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 40px;
}

header {
  text-align: center;
  margin-bottom: 60px;
}

header h1 {
  font-size: 42px;
  font-weight: 600;
  margin: 0;
}

header p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 16px;
}

.columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.column h2 {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 20px;
  color: var(--muted);
}

.card {
  background: var(--card);
  padding: 20px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  cursor: grab;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.12);
}

.card h3 {
  margin: 0 0 6px 0;
  font-size: 18px;
  font-weight: 500;
}

.card p {
  margin: 0 0 14px 0;
  font-size: 14px;
  color: var(--muted);
}

.card a {
  font-size: 14px;
  color: #0071e3;
  text-decoration: none;
}

.card a:hover {
  text-decoration: underline;
}