:root {
  --brown: #eeece4;
  --light-gray: #eeece4;
  --shadow: rgba(0, 0, 0, 0.1);
}

body {
  font-family: "Inter", "Segoe UI", sans-serif;
  background-color: #eeece4;
  margin: 0;
  color: #222;
}

/* Breadcrumb navigation */
.breadcrumb {
  position: fixed;
  top: 30px;
  left: 20px;
  z-index: 99;
  font-size: 18px;
  color: #7c7c7c;
}

.breadcrumb a {
  color: #7c7c7c;
  text-decoration: none;
  transition: color 0.3s;
}

.breadcrumb a:hover {
  color: #000000;
}

.breadcrumb span {
  margin: 0 8px;
}

/* Navigation bar */
.navbar {
  width: 100%;
  padding: 20px 0px;
  display: flex;
  justify-content: flex-end;
  background-color: transparent;
  position: fixed;
  top: 0;
  left: -10px;
  z-index: 100;
}

.nav-links {
  list-style: none;
  margin: 0;
  padding: 5px;
  display: flex;
  gap: 30px;
}

.nav-links li a {
  text-decoration: none;
  color: #7c7c7c;
  font-size: 18px;
  transition: color 0.3s;
}

.nav-links li a:hover {
  color: #000000;
}

/* Dropdown menu styling */
.dropdown {
  position: relative;
}

.dropdown-menu {
  list-style: none;
  position: absolute;
  top: 100%;
  right: 0;
  background-color: white;
  border: 1px solid #ddd;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  padding: 8px 0;
  margin: 0;
  min-width: 150px;
  display: none;
  z-index: 101;
}

.dropdown:hover .dropdown-menu {
  display: block;
}

.dropdown-menu li {
  padding: 0;
}

.dropdown-menu li a {
  display: block;
  padding: 10px 20px;
  text-decoration: none;
  color: #7c7c7c;
  font-size: 16px;
  transition: background-color 0.2s, color 0.2s;
}

.dropdown-menu li a:hover {
  background-color: #f0f0f0;
  color: #000000;
}

/* Page title */
h1 {
  text-align: center;
  margin: 80px 20px 20px 20px;
  font-size: 48px;
  color: #111;
}

h3 {
  text-align: center;
  margin: 0px 20px 0px 20px;
  font-size: 20px;
  color: #444;
}
/* Controls section */
.controls {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  padding: 1rem;
  background: var(--light-gray);
  border-bottom: 1px solid #dddddc;
  margin-top: 10px;
}

.control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.control label {
  font-weight: 600;
  white-space: nowrap;
}

.control input,
.control select {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}

.control input:focus,
.control select:focus {
  outline: none;
  border-color: #4a90c8;
  box-shadow: 0 0 0 3px rgba(74, 144, 200, 0.15);
}

/* Grid layout */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
  justify-items: center;
  align-items: start;
}

/* Card styling */
.card {
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 12px var(--shadow);
  text-align: center;
  padding: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100%;
  max-width: 300px;
}

.card img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 0.75rem;
}

.card h3 {
  margin: 0.5rem 0;
  color: black;
  font-size: 18px;
}

.card p {
  font-size: 0.9rem;
  color: #555;
  min-height: 48px;
  margin: 0.5rem 0;
}

.card a {
  display: inline-block;
  margin-top: 0.75rem;
  background: #4a90c8;
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  transition: background-color 0.2s;
}

.card a:hover {
  background-color: #3a7ab0;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 18px var(--shadow);
}

/* Skill and level labels */
.skill-label {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  margin: 4px 2px;
  color: white;
}

.skill-label.reading {
  background-color: #4caf50;
}

.skill-label.listening {
  background-color: #4a90c8;
}

.skill-label.writing {
  background-color: #ff9800;
}

.skill-label.speaking {
  background-color: #f44336;
}

.skill-label.beginner {
  background-color: #9ccc65;
}

.skill-label.intermediate {
  background-color: #ffb74d;
}

.skill-label.advanced {
  background-color: #ef5350;
}

.skill-label.superior {
  background-color: #7e57c2;
}

/* Footer */
footer {
  background: var(--light-gray);
  padding: 1rem;
  text-align: center;
  color: #777;
  font-size: 0.85rem;
  margin-top: 2rem;
  border-top: 1px solid #ddd;
}

/* Responsive design */
@media (max-width: 768px) {
  h1 {
    font-size: 36px;
    margin: 70px 15px 25px 15px;
  }

  .controls {
    flex-direction: column;
    gap: 0.75rem;
  }

  .control {
    flex-direction: column;
    align-items: flex-start;
  }

  .control input,
  .control select {
    width: 100%;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    padding: 1rem;
    gap: 1rem;
  }

  .nav-links {
    gap: 15px;
  }

  .nav-links li a {
    font-size: 16px;
  }
}

/* Resource section styling */
.resource-section {
  padding: 2rem;
  margin: 2rem 0;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.resource-section h2 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  color: #111;
  font-size: 28px;
  border-bottom: 2px solid #4a90c8;
  padding-bottom: 0.75rem;
}

/* Level subtitle styling */
.level-subtitle {
  margin-top: 1.5rem;
  margin-bottom: 1rem;
  color: #333;
  font-size: 20px;
  font-weight: 600;
  text-decoration: underline;
  padding-left: 0;
}

.resource-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Constrain Graphic Novels & Comics list width */
.resource-section[data-category="graphic"] .resource-list {
  max-width: 350px;
  width: 100%;
  margin: 0 auto; /* center within section */
}

.resource-section[data-category="graphic"] .resource-item,
.resource-section[data-category="graphic"] .resource-item a {
  word-break: break-word;
  overflow-wrap: anywhere;
}

.resource-item {
  padding: 1rem;
  margin-bottom: 0.5rem;
  background-color: #f9f9f9;
  border-left: 4px solid #4a90c8;
  border-radius: 4px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.resource-item:hover {
  background-color: #f0f0f0;
  transform: translateX(5px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.resource-item.hidden {
  display: none;
}

.resource-item.highlighted {
  background-color: #4a90c8;
  border-left-color: #3a7ab0;
  color: #fff;
  box-shadow: 0 4px 12px rgba(74, 144, 200, 0.3);
  animation: highlight-pulse 0.5s ease;
}

.resource-item.highlighted:hover {
  background-color: #3a7ab0;
}

@keyframes highlight-pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}

/* Resource section hidden state */
.resource-section.hidden {
  display: none;
}

/* Custom dropdown styling */
.category-dropdown-wrapper {
  position: relative;
  display: inline-block;
  width: 100%;
  max-width: 300px;
}

.category-dropdown-button {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 6px;
  background-color: white;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.category-dropdown-button:hover {
  border-color: #4a90c8;
}

.category-dropdown-button:focus {
  outline: none;
  border-color: #4a90c8;
  box-shadow: 0 0 0 3px rgba(74, 144, 200, 0.15);
}

.category-dropdown-button::after {
  content: "▼";
  font-size: 10px;
  color: #666;
  margin-left: 8px;
}

.category-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: white;
  border: 1px solid #ddd;
  border-radius: 6px;
  margin-top: 4px;
  display: none;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  max-height: 300px;
  overflow-y: auto;
}

.category-dropdown-menu.active {
  display: block;
}

.dropdown-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  cursor: pointer;
  font-weight: 400;
  transition: background-color 0.2s;
}

.dropdown-checkbox:hover {
  background-color: #f5f5f5;
}

.dropdown-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: #4a90c8;
  margin: 0;
}

.dropdown-checkbox span {
  user-select: none;
}

/* Link styling within resource items */
.resource-item a {
  color: #4a90c8;
  text-decoration: underline;
  cursor: pointer;
  transition: color 0.2s;
}

.resource-item a:hover {
  color: #3a7ab0;
}