.demo-section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 0;
  text-align: center;
}

.demo-section h2 {
  font-size: 28px;
  margin-bottom: 10px;
  color: #002f5f;
}

.demo-section p.lead {
  font-size: 15px;
  color: #444;
  margin-bottom: 30px;
}

/* GRID DLAŽDIC */
.demo-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

/* DLAŽDICE */
.demo-card {
  flex: 1 1 420px;
  background: linear-gradient(180deg, #0077cc, #005bbb);
  color: #fff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.demo-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

/* TITULEK */
.demo-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

/* SEZNAM */
.demo-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
}

.demo-card li {
  font-size: 14px;
  margin-bottom: 6px;
}

.demo-card li::before {
  content: "✔ ";
  color: #fff;
}

/* TLAČÍTKO */
.demo-card .btn {
  display: inline-block;
  background: #fff;
  color: #005bbb;
  font-weight: 600;
  border-radius: 6px;
  padding: 10px 20px;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.demo-card .btn:hover {
  background: #e8f2ff;
  color: #004999;
}

@media (max-width: 900px) {
  .demo-card { flex: 1 1 100%; }
}