/* Reset CSS cơ bản */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;

}

body {
  background: linear-gradient(to right, #cdfcff, #135eff);

}

.navbar {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 15px 40px;
  background: url('mountain-bg.jpg') center/cover no-repeat;
  position: relative;
  width: 80%;

}

.logo img {
  height: 80px;
  padding-left: 60px;
  
}

.menu {
  display: flex;
  position: relative;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  padding:20px 80px;
  
}

.menu a {
  position: relative;
  padding: 12px 20px;
  margin: 0 5px;
  color: #002147;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.menu a:hover {
  color: #f58220;
}

.indicator {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: #f58220;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.carousel-container {
  width: 80%;
  margin: 40px auto;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.carousel-item img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform 0.8s ease-in-out, opacity 0.8s ease-in-out;
}

.carousel-item.active img {
  transform: scale(1.03);
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  padding: 15px;
  background-size: 60%;
}

.book-card { transition: transform 0.3s ease, box-shadow 0.3s ease; }
.book-card:hover { transform: translateY(-5px); box-shadow: 0 20px 20px rgba(0,0,0,0.2); }
.book-img { height: 300px; object-fit: cover; }
.contact-section {
  background-color: #fff;
  padding: 50px 0;
}

.contact-box {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  margin-bottom: 30px;
  border: 1px solid #ddd;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  background-color: #f9f9f9;
}
.contact-box:hover {
  transform: translateY(-10px);
  box-shadow: 0px 4px 20px rgba(0, 0, 0, 0.1);
}
.contact-box h5 {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 15px;
}
.contact-box p {
  font-size: 1rem;
  color: #555;
}
.contact-box a {
  color: #007bff;
  text-decoration: none;
}
.contact-box a:hover {
  text-decoration: underline;
}
.row {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}