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

body {
  font-family: Arial, sans-serif;
  background: #f0f0f0;
  padding: 20px;
}

h1 {
  text-align: center;
  margin-bottom: 30px;
  color: #333;
}

/* Navigation Bar */
.nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #333;
  padding: 15px 30px;
  border-radius: 8px;
  margin-bottom: 40px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.nav-logo {
  color: white;
  font-weight: bold;
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  gap: 20px;
}

.nav-links a {
  color: white;
  text-decoration: none;
  padding: 8px 15px;
  border-radius: 4px;
  transition: background 0.3s;
}

.nav-links a:hover {
  background: #555;
}

/* Main Flex Container */
.flex-container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  justify-content: center;
}

.flex-item {
  background: white;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  text-align: center;
  flex: 1 1 250px;
  max-width: 300px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.flex-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.flex-item h2 {
  color: #2196F3;
  margin-bottom: 10px;
}

/* Row Layout */
.row-container {
  display: flex;
  flex-direction: row;
  gap: 15px;
  max-width: 1200px;
  margin: 40px auto 0;
  align-items: stretch;
}

.row-item {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 40px 20px;
  border-radius: 8px;
  text-align: center;
  flex: 1;
}

/* Column Layout */
.column-container {
  display: flex;
  flex-direction: column;
  gap: 15px;
  max-width: 400px;
  margin: 40px auto 0;
}

.column-item {
  background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
  color: white;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
}

/* Centered Content */
.center-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  background: white;
  border-radius: 8px;
  margin-top: 40px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.center-box {
  background: #FF6B6B;
  color: white;
  padding: 40px 60px;
  border-radius: 8px;
  text-align: center;
}

@media (max-width: 768px) {
  .nav-bar {
    flex-direction: column;
    gap: 15px;
  }

  .row-container {
    flex-direction: column;
  }
}

#bkto { 
  display: inline-block;
  width: 500px;
  margin: 20px;
  margin-left: 500px;
  padding: 10px 15px;
  background-color: #37eeb1;
  color: rgb(73, 68, 68);
  text-decoration: none;
  text-align: center;
  border-radius: 5px;
  border-bottom: #336088 5px solid;
  
}