/* iot.css */
body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background-color: #f9f9f9;
  color: #222;
  line-height: 1.7;
}

.iot-header {
  background-color: #222;
  color: #fff;
  padding-bottom: 20px;
}

.iot-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background-color: #2d2d2d;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  color: #00bcd4;
}

.logo span {
  color: #ff4081;
}

.iot-menu {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 0;
}

.iot-menu li a {
  text-decoration: none;
  color: #bbb;
  padding: 8px 12px;
  border-radius: 4px;
  transition: background 0.3s;
}

.iot-menu li a.active,
.iot-menu li a:hover {
  background-color: #444;
  color: #fff;
}

.hero {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(to right, #00bcd4, #4dd0e1);
  color: #fff;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 10px;
}

.iot-main {
  padding: 40px 20px;
  max-width: 1200px;
  margin: auto;
}

.iot-main section {
  margin-bottom: 60px;
}

.iot-section article {
  margin-top: 20px;
  padding: 20px;
  background: #fff;
  border-left: 5px solid #00bcd4;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.iot-section h2,
.iot-section h3,
.intro h2,
.future h2,
.iot-challenges h2 {
  color: #333;
  margin-bottom: 15px;
  font-weight: 600;
}

.iot-section ul,
.iot-challenges ul {
  padding-left: 20px;
}

.iot-section ul li,
.iot-challenges ul li {
  margin-bottom: 10px;
}

.future p {
  margin-top: 10px;
}

.iot-footer {
  text-align: center;
  padding: 30px 20px;
  background-color: #2d2d2d;
  color: #ccc;
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .iot-menu {
    flex-direction: column;
    gap: 6px;
  }
}