/* General Page Styling */
body {
  font-family: Arial, sans-serif;
  background-color: #edf0f5;
  color: #081f5c;
  margin: 0;
  padding: 20px;
}

h1 {
  text-align: center;
  font-family: "Times New Roman", serif;
  margin-bottom: 20px;
  font-size: 28px;
  color: #081f5c;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #081f5c;
  padding: 10px 20px;
  border-radius: 12px;
  margin-bottom: 20px;
}

.navbar .brand {
  font-size: 27px;
  font-weight: bold;
  color: #ffffef;
  text-decoration: none;
  font-family: "Times New Roman", serif;
}

.navbar .nav-links {
  display: flex;
  gap: 15px;
}

.navbar .nav-links a {
  color: #ffffef;
  text-decoration: none;
  font-size: 16px;
  padding: 6px 12px;
  border-radius: 8px;
  transition: background 0.3s, color 0.3s;
  font-family: "Times New Roman", serif;
}

.navbar .nav-links a.active {
  background-color: #ffffef;
  color: #081f5c;
}

/* Filter dropdown */
.filter-section {
  max-width: 1000px;
  margin: 20px auto;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  font-family: "Courier New", monospace;
  color: #9a7fb4;
}

.filter-section select {
  padding: 8px;
  border-radius: 8px;
  border: 1px solid #344fad;
  font-family: "Courier New", monospace;
  background-color: #f9f6ff;
}

/* Library Grid */
#libraryGrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}

#libraryGrid img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 10px;
  cursor: pointer;
  border: 2px solid #344fad;
  transition: transform 0.2s;
}

#libraryGrid img:hover {
  transform: scale(1.05);
}

/* Book card */
.book-card {
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  text-align: center;
  border: 2px solid #344fad;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.book-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.book-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 10px;
}

.book-card h3 {
  font-size: 16px;
  color: #081f5c;
  margin: 6px 0 4px;
  font-weight: bold;
}

.book-card p {
  font-size: 14px;
  color: black;
  margin: 2px 0;
}

/* Status text inside cards */
.book-card .status {
  margin-top: 6px;
  font-weight: bold;
  color: #344fad;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.modal-content {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.close {
  position: absolute;
  top: 12px;
  right: 15px;
  font-size: 24px;
  cursor: pointer;
}

#deleteBookBtn {
  background-color: #081f5c;
  color: #fff9ef;
  border: none;
  padding: 10px 15px;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 15px;
  font-family: "Courier New";
  transition: background 0.3s;
}

#deleteBookBtn:hover {
  background: #fff9ef;
  color: #081f5c;
  border-color: #081f5c;
  border-radius: 12px;
}

/* Responsive tweaks */
@media (max-width: 768px) {
  #libraryGrid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 18px;
  }

  .book-card img {
    height: 180px;
  }
}

@media (max-width: 480px) {
  #libraryGrid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 15px;
  }

  .book-card img {
    height: 160px;
  }
}