.book-card {
    background: #fff;
    border: 1px solid #d9f3d3;
    border-top: 5px solid #99d98c;
    border-radius: 20px;
    overflow: hidden;
    transition: .3s;
    box-shadow: 0 5px 15px rgba(0, 0, 0, .05);
}

.book-card:hover {
    border-color: #99d98c;
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(153, 217, 140, .20);
}

.login-btn:hover {
    background: white;
    backdrop-filter: blur(8px);
    color: #99d98c !important;
    transform: scale(1.05);
    border: 2px solid #99d98c;
}

.feature-box {
    background: #ffffff;
    padding: 30px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Subtle hover effect to make the cards interactive */
.feature-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.5rem; /* Makes the emojis stand out beautifully */
}

.signup-alert {
  position: fixed;
  margin-top: 480px;
  top: 40;
  left: 0;
  width: 100%;
  background: #99d98c;
  color: #fff;
  padding: 12px 20px;
  z-index: 9999;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  animation: slideDown 0.5s ease;
}

.alert-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: auto;
  font-family: Arial, sans-serif;
  font-size: 15px;
}

/* Target the correct class from your HTML */
.hero-section {
  margin-top: 20px;
    text-align: center;
    padding: 100px 20px;
    background-color: #99d98c; /* Added a dark background since your text is white */
    min-height: 50vh; /* Helps 'align-items-center' work properly */
}

.hero-section h1 {
    font-size: 50px;
    color: #ffffff; /* Overrides Bootstrap text color if needed */
    margin-bottom: 20px;
}

.hero-section p {
    font-size: 20px;
    color: #ffffff; /* Changed to lighter color to contrast with dark background */
    margin-bottom: 30px;
}

/* Renamed to custom-btn to avoid overriding all Bootstrap buttons */
.custom-btn {
    display: inline-block;
    background-color: #ffffff;
    color: #99d98c;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 8px;
    transition: 0.3s;
}

.custom-btn:hover {
  border: 2px solid #ffffff;
    background-color: #99d98c; /* Made the hover state slightly darker for visual feedback */
    color: #ffffff;
}

.alert-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-signup {
  background: #fff;
  color: #99d98c;
  padding: 6px 14px;
  border-radius: 20px;
  text-decoration: none;
  font-weight: bold;
  transition: 0.3s;
}

.btn-signup:hover {
  background: #f1f1f1;
}

.btn-close {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
}

@keyframes slideDown {
  from { transform: translateY(-100%); }
  to { transform: translateY(0); }
}

/* Mobile Responsive */
@media (max-width: 600px) {
  .alert-content {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}