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

body {
  background-color: #f4f4f4;
  color: #333;
  line-height: 1.6;
}

header {
  background: #004080;
  color: #fff;
  padding: 1rem 0;
  text-align: center;
}

nav {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
}

section {
  padding: 2rem;
  max-width: 1200px;
  margin: auto;
}

.plan-category h2 {
  text-align: center;
  color: #004080;
  margin-bottom: 1.5rem;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.plan {
  background: #fff;
  padding: 1.5rem;
  border-radius: 15px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  text-align: center;
}

.plan h3 {
  color: #00703c;
  margin-bottom: 0.5rem;
}

.plan .price {
  font-size: 1.5rem;
  font-weight: bold;
  color: #333;
  margin: 1rem 0;
}

.plan ul {
  list-style: none;
  text-align: left;
  margin: 1rem 0;
}

.plan ul li::before {
  content: '✔';
  color: green;
  margin-right: 8px;
}

.plan button {
  padding: 0.75rem 1.5rem;
  background: #00703c;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bold;
}

.plan-duration-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.tab {
  padding: 0.4rem 1rem;
  border: 2px solid #00703c;
  border-radius: 20px;
  background-color: #fff;
  cursor: pointer;
  font-weight: bold;
  color: #00703c;
  transition: all 0.3s ease;
}

.tab.active, .tab:hover {
  background-color: #00703c;
  color: #fff;
}

footer {
  background: #004080;
  color: #fff;
  text-align: center;
  padding: 1rem 0;
  margin-top: 2rem;
}