:root {
  --primary-bg: #1a1a1a; /* Dark background */
  --secondary-bg: #2a2a2a; /* Slightly lighter dark */
  --text-color: #e0e0e0;
  --accent-color: #007bff; /* A vibrant accent like Tesla blue or a Pokéball red */
  --accent-hover: #0056b3;
  --error-color: #ff4d4d;
  --win-color: #4caf50; /* Green for win messages */
  --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  --border-radius: 12px;
  --transition-speed: 0.4s;
}

body,
html {
  margin: 0;
  padding: 0;
  font-family: "Roboto", sans-serif;
  background-color: var(--primary-bg);
  color: var(--text-color);
  min-height: 100%;
  overflow-x: hidden;
}

#app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  align-items: center;
  padding: 20px;
  box-sizing: border-box;
}

.app-header {
  width: 100%;
  max-width: 800px; /* Increased for wider nav */
  text-align: center;
  margin-bottom: 30px;
  padding: 20px 0;
}

.app-header h1 {
  font-size: 2.8em;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 25px;
  letter-spacing: 1px;
  opacity: 0;
  animation: fadeInDown 0.8s ease forwards;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.main-nav {
  display: flex;
  justify-content: center;
  gap: 15px; /* Adjusted gap for more links */
  margin-bottom: 25px;
  flex-wrap: wrap; /* Allow nav links to wrap */
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  padding: 8px 15px;
  border-radius: var(--border-radius);
  transition: background-color var(--transition-speed),
    color var(--transition-speed);
  font-weight: 500;
  white-space: nowrap; /* Prevent links from breaking mid-word */
}

.nav-link:hover {
  background-color: var(--secondary-bg);
  color: var(--accent-color);
}

.nav-link.active {
  background-color: var(--accent-color);
  color: white;
  font-weight: 700;
}

.search-area {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  opacity: 0;
  animation: fadeInUp 0.8s 0.3s ease forwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#pokemonInput {
  flex-grow: 1;
  padding: 12px 15px;
  border: 1px solid var(--secondary-bg);
  background-color: var(--secondary-bg);
  color: var(--text-color);
  border-radius: var(--border-radius);
  font-size: 1em;
  transition: border-color var(--transition-speed),
    box-shadow var(--transition-speed);
}

#pokemonInput:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

#searchButton {
  padding: 12px 20px;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1em;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background-color var(--transition-speed), transform 0.2s ease;
}

#searchButton:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
}

#searchButton:active {
  transform: translateY(0);
}

.pokemon-details-section {
  width: 100%;
  max-width: 450px;
  margin-top: 40px;
  opacity: 0;
  transform: translateY(30px) scale(0.95);
  transition: opacity var(--transition-speed) ease-out,
    transform var(--transition-speed) ease-out;
  display: flex;
  justify-content: center;
}

.pokemon-details-section:not(.hidden) {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.pokemon-card {
  background-color: var(--secondary-bg);
  border-radius: var(--border-radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--card-shadow);
  width: 100%;
  overflow: hidden;
}

#pokemon-image-container {
  width: 200px;
  height: 200px;
  margin: 0 auto 20px auto;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

#pokemonImage {
  max-width: 90%;
  max-height: 90%;
  height: auto;
  transition: transform 0.5s ease, opacity 0.3s ease;
  filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.2));
}

#pokemonImage.loading {
  opacity: 0.5;
  transform: scale(0.8);
}

#pokemonName {
  font-size: 2.2em;
  font-weight: 700;
  color: var(--text-color);
  margin: 0 0 10px 0;
  text-transform: capitalize;
}

.pokemon-id {
  font-size: 1em;
  color: #aaa;
  margin-bottom: 15px;
}

.pokemon-types {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.pokemon-types span {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.9em;
  font-weight: 500;
  color: white;
  text-transform: capitalize;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}

.type-normal {
  background-color: #a8a77a;
}
.type-fire {
  background-color: #ee8130;
}
.type-water {
  background-color: #6390f0;
}
.type-electric {
  background-color: #f7d02c;
  color: #333;
}
.type-grass {
  background-color: #7ac74c;
}
.type-ice {
  background-color: #96d9d6;
  color: #333;
}
.type-fighting {
  background-color: #c22e28;
}
.type-poison {
  background-color: #a33ea1;
}
.type-ground {
  background-color: #e2bf65;
  color: #333;
}
.type-flying {
  background-color: #a98ff3;
}
.type-psychic {
  background-color: #f95587;
}
.type-bug {
  background-color: #a6b91a;
}
.type-rock {
  background-color: #b6a136;
}
.type-ghost {
  background-color: #735797;
}
.type-dragon {
  background-color: #6f35fc;
}
.type-dark {
  background-color: #705746;
}
.type-steel {
  background-color: #b7b7ce;
  color: #333;
}
.type-fairy {
  background-color: #d685ad;
}

.message-center {
  margin-top: 20px;
  min-height: 25px;
  text-align: center;
  width: 100%;
  max-width: 500px; /* Consistent width for messages */
}

.error-message,
.loading-message,
.win-message {
  opacity: 0;
  transition: opacity var(--transition-speed);
  font-weight: 500;
  margin: 5px 0;
}

.error-message.visible,
.loading-message.visible,
.win-message.visible {
  opacity: 1;
}
.error-message {
  color: var(--error-color);
}
.loading-message {
  color: var(--accent-color);
}
.win-message {
  color: var(--win-color);
  font-size: 1.2em;
}

.hidden {
  display: none !important;
}
.pokemon-details-section.hidden {
  opacity: 0 !important;
  transform: translateY(30px) scale(0.95) !important;
  pointer-events: none;
}

/* Styles for All Pokémon Page */
#pokemon-list-section {
  width: 100%;
  max-width: 1200px;
  margin: 20px auto;
  padding: 0 10px;
}

.pokemon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.pokemon-list-item {
  background-color: var(--secondary-bg);
  border-radius: var(--border-radius);
  padding: 15px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInGridItem 0.5s ease forwards;
}

@keyframes fadeInGridItem {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.pokemon-list-item:hover {
  transform: translateY(-5px) scale(1.03);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.pokemon-list-item img {
  width: 96px;
  height: 96px;
  margin-bottom: 10px;
  image-rendering: pixelated;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  padding: 5px;
}

.pokemon-list-item h3 {
  margin: 0;
  font-size: 1.1em;
  color: var(--text-color);
  text-transform: capitalize;
}

.pokemon-list-item .list-item-id {
  font-size: 0.8em;
  color: #aaa;
  margin-top: 5px;
}

/* Pagination Styles */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 30px;
  margin-bottom: 20px;
  gap: 10px;
  flex-wrap: wrap;
}

.pagination button,
.pagination span {
  padding: 8px 15px;
  background-color: var(--secondary-bg);
  color: var(--text-color);
  border: 1px solid var(--primary-bg);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-speed),
    color var(--transition-speed);
  font-weight: 500;
}

.pagination button:hover:not(:disabled) {
  background-color: var(--accent-color);
  color: white;
}

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination .page-info {
  font-size: 0.9em;
  background-color: transparent;
  border: none;
  cursor: default;
  padding: 8px 0;
}

#list-message-center {
  /* For All Pokémon page */
  min-height: 40px;
  margin-bottom: 20px;
}

/* Memory Game Styles */
#memory-game-section {
  width: 100%;
  max-width: 800px;
  margin: 20px auto;
  padding: 0 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.game-info-controls {
  display: flex;
  justify-content: space-around;
  align-items: center;
  width: 100%;
  max-width: 600px;
  margin-bottom: 25px;
  background-color: var(--secondary-bg);
  padding: 15px;
  border-radius: var(--border-radius);
  box-shadow: var(--card-shadow);
  flex-wrap: wrap;
  gap: 10px;
}

.game-stat {
  font-size: 1.1em;
  color: var(--text-color);
  padding: 5px 10px;
}

.game-stat span {
  font-weight: 700;
}

.game-button {
  padding: 10px 20px;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1em;
  font-weight: 500;
  transition: background-color var(--transition-speed), transform 0.2s ease;
}

.game-button:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
}

#game-message-center {
  /* For Memory Game page */
  min-height: 30px;
  margin-bottom: 20px;
}

.memory-game-board {
  display: grid;
  gap: 10px;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  perspective: 1000px;
}

.memory-card {
  background-color: var(--secondary-bg);
  aspect-ratio: 3 / 4;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.memory-card.is-flipped {
  transform: rotateY(180deg);
}

.memory-card.is-matched {
  cursor: default;
  opacity: 0.7;
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius);
  overflow: hidden;
}

.card-front {
  background-color: #e0e0e0;
  transform: rotateY(180deg);
}

.card-front img {
  max-width: 80%;
  max-height: 80%;
  object-fit: contain;
  image-rendering: pixelated;
}

.card-back {
  background-color: var(--accent-color);
  font-size: 3em;
  color: white;
}

.card-back::before {
  content: "?";
}

footer {
  margin-top: auto;
  padding: 20px;
  text-align: center;
  font-size: 0.9em;
  color: #777;
  width: 100%;
  opacity: 0;
  animation: fadeInUp 1s 0.8s ease forwards;
}

footer a {
  color: var(--accent-color);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 700px) {
  .app-header h1 {
    font-size: 2.4em;
  }
  .main-nav {
    gap: 10px;
  }
  .nav-link {
    padding: 8px 10px;
  }
  .memory-game-board {
    max-width: 95%;
    gap: 8px;
  }
  .game-info-controls {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .app-header h1 {
    font-size: 2.2em;
  }
  .search-area {
    flex-direction: column;
  }
  #searchButton {
    width: 100%;
    justify-content: center;
  }
  .pokemon-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
  }
  .pokemon-list-item {
    padding: 10px;
  }
  .pokemon-list-item img {
    width: 80px;
    height: 80px;
  }
  .pokemon-list-item h3 {
    font-size: 1em;
  }
}

@media (max-width: 480px) {
  .main-nav {
    gap: 5px;
  }
  .nav-link {
    font-size: 0.9em;
    padding: 6px 8px;
  }
  .card-back {
    font-size: 2.5em;
  }
  .memory-game-board {
    /* Dynamically set by JS, but if fixed number of cards, can adjust here */
    /* e.g., for 16 cards, ensure 4 columns fit well */
  }
}