/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html, body {
  height: 100%;
}
body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  display: flex;
  flex-direction: column;
}

/* Header & Footer */
header, footer {
  background-color: #333;
  color: #fff;
  padding: 20px;
  text-align: center;
}

/* Header Container */
.header-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hamburger Button (top left) */
.menu-btn {
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 101;
}

/* Curtain Menu (slides in from left) */
.curtain-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 300px;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
  z-index: 100;
}
.curtain-menu.open {
  transform: translateX(0);
}
.curtain-menu ul {
  list-style: none;
  padding: 50px 20px;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
  text-align: center;
}
.curtain-menu ul li a {
  color: #fff;
  font-size: 1.5rem;
  text-decoration: none;
}

/* Header Title */
header h1 {
  font-size: 2rem;
}

/* Footer */
footer p {
  margin: 0;
  text-align: center;
}

/* Main Content Area */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 20px;
  width: 100%;
}

/* Hide content-section by default unless visible class is present */
.content-section {
  display: none;
  width: 90%;
  margin-bottom: 20px;
}
.content-section.visible {
  display: block;
  animation: fadeIn 0.5s ease;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Grid for 6 columns per row */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  margin-top: 20px;
}

/* Reagent Card Style */
.reagent-card {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  padding: 15px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.reagent-card h3 {
  font-size: 1.2rem;
  margin-bottom: 5px;
}
.reagent-card p {
  margin: 5px 0;
  font-size: 0.9rem;
}
.reagent-img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 10px;
}
.edit-btn {
  background-color: #ffc107;
  color: #333;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.3s ease;
  margin-top: auto; /* push edit button to bottom */
}
.edit-btn:hover {
  background-color: #e0a800;
}

/* Floating Action Button (FAB) */
.fab {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  font-size: 2rem;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
  z-index: 200;
  transition: background-color 0.3s ease;
}
.fab:hover {
  background-color: #0056b3;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 150;
}

/* Modal Window */
.modal {
  background: #fff;
  width: 90%;
  max-width: 500px;
  padding: 20px;
  border-radius: 8px;
  position: relative;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* Modal Close Button */
.modal-close {
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Form Group */
.form-group {
  margin-bottom: 15px;
}
.form-group label {
  display: block;
  font-weight: bold;
  margin-bottom: 5px;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

/* Submit Button */
.submit-btn {
  background-color: #28a745;
  color: #fff;
  border: none;
  padding: 10px 15px;
  font-size: 1rem;
  border-radius: 4px;
  cursor: pointer;
  width: 100%;
  transition: background-color 0.3s ease;
  margin-top: 10px;
}
.submit-btn:hover {
  background-color: #218838;
}

/* Delete Button for Edit Modal */
.delete-btn {
  background-color: #dc3545;
  color: #fff;
  border: none;
  padding: 10px 15px;
  font-size: 1rem;
  border-radius: 4px;
  cursor: pointer;
  width: 100%;
  margin-top: 10px;
  transition: background-color 0.3s ease;
}
.delete-btn:hover {
  background-color: #c82333;
}

/* Reagent Card Style with on-hover effects */
.reagent-card {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  padding: 15px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  transition: transform 0.3s ease, box-shadow 0.3s ease, filter 0.3s ease;
}

.reagent-card:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 16px rgba(0,0,0,0.4);
  filter: brightness(1.05);
}