@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');

body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: #f0f2f5;
  color: #333;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #111;
  color: #fff;
  padding: 15px 30px;
  position: sticky;
  top: 0;
  z-index: 100;
}

header .logo {
  font-weight: 600;
  font-size: 20px;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: #fff;
  border-radius: 2px;
}

/* Tabs */
nav#nav-tabs {
  display: flex;
  gap: 10px;
}

.tab-btn {
  background: #fff;
  border: 2px solid #0078d7;
  color: #0078d7;
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: 0.3s;
}

.tab-btn.active, .tab-btn:hover {
  background: #0078d7;
  color: #fff;
}

/* Tab contents */
.tab-content {
  display: none;
  padding: 0 20px 50px 20px;
}

/* Card layout */
.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background: #fff;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

/* Centered card */
.centered-card {
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  background: #111;
  color: #fff;
  margin-top: 30px;
}

/* WhatsApp overlay icon */
.whatsapp-overlay {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 60px;
  height: 60px;
  z-index: 1000;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  transition: transform 0.3s, box-shadow 0.3s;
}

.whatsapp-overlay img {
  width: 100%;
  height: 100%;
  display: block;
}

.whatsapp-overlay:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 18px rgba(0,0,0,0.3);
}

/* Responsive */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  nav#nav-tabs {
    position: absolute;
    top: 60px;
    right: 30px;
    flex-direction: column;
    background: #111;
    padding: 10px;
    border-radius: 10px;
    display: none;
  }

  nav#nav-tabs.active {
    display: flex;
  }
}