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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f2f5f9;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background-color: #ffffff;
  padding: 16px 24px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  display: flex;
  justify-content: center;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-container img {
  height: 40px;
}

.logo-container .title {
  font-size: 20px;
  font-weight: 600;
  color: #005A9E;
}

main {
  flex: 1;
  padding: 40px 20px;
  display: flex;
  justify-content: center;
}

.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: 1000px;
  width: 100%;
}

/* เพิ่ม Flexbox เพื่อควบคุม layout ภายใน card */
.card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;  /* ให้ปุ่มชิดล่าง */
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 12px;
  background-color: white;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  min-height: 300px;              /* 🔧 ปรับตามความเหมาะสม */
}

.card:hover {
  transform: translateY(-4px);
}

.card h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.card p {
  font-size: 15px;
  margin-bottom: 16px;
}

.card a {
  display: block;            /* ทำให้ใช้ margin auto ได้ */
  padding: 10px 20px;
  background-color: #0078D4;
  color: white;
  border-radius: 6px;
  text-align: center;
  text-decoration: none;
  font-weight: bold;
}

.card a:hover {
  background-color: #005A9E;
}

.card-list {
  list-style-type: disc;
  padding-left: 20px;
  margin-bottom: 16px;
  flex-grow: 1;
}

footer {
  text-align: center;
  padding: 16px;
  background-color: #ffffff;
  font-size: 14px;
  color: #888;
  box-shadow: 0 -1px 4px rgba(0,0,0,0.05);
}