/* Base Styling */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(to right, #3a6073, #16222a);
  margin: 0;
  padding: 0;
  color: #ffffff;
  text-align: center;
}

/* Header */
header {
  background-color: rgba(0, 0, 0, 0.7);
  padding: 2rem 1rem;
}

header h1 {
  font-size: 3rem;
  margin: 0;
  color: #00d2ff;
}

.subtitle {
  font-size: 1.2rem;
  color: #ccc;
  margin-top: 0.5rem;
}

/* Game Grid Layout */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
  max-width: 1100px;
  margin: auto;
}

/* Game Card Styling */
.game-card {
  background-color: #1e2a38;
  border: 1px solid #00d2ff;
  border-radius: 10px;
  padding: 1.5rem;
  text-align: center;
  text-decoration: none;
  color: white;
  transition: transform 0.3s, background-color 0.3s;
}

.game-card:hover {
  background-color: #263645;
  transform: scale(1.05);
}

.game-card h2 {
  margin-top: 0;
}

/* Footer */
footer {
  text-align: center;
  padding: 1rem;
  background-color: rgba(0, 0, 0, 0.6);
  color: #ccc;
}

/* Headings & Paragraphs */
h2 {
  color: #00d2ff;
}
p {
  margin-top: 1rem;
  font-size: 1.1rem;
}

/* Inputs & Buttons */
input, button {
  padding: 0.5rem;
  font-size: 1rem;
  margin-top: 0.5rem;
  border-radius: 5px;
  border: none;
}
button {
  background-color: #00d2ff;
  color: white;
  cursor: pointer;
  transition: background-color 0.3s;
}
button:hover {
  background-color: #009bd4;
}

/* Tic Tac Toe Board */
.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  gap: 5px;
  justify-content: center;
  margin-top: 20px;
}

.cell {
  width: 100px;
  height: 100px;
  background-color: #1e2a38;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2em;
  cursor: pointer;
  border: 2px solid #00d2ff;
}

/* Memory Match Game */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 80px);
  gap: 10px;
  justify-content: center;
  margin-top: 20px;
}

.card {
  width: 80px;
  height: 80px;
  background-color: #00d2ff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5em;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}

/* Reaction Test */
#box {
  width: 150px;
  height: 150px;
  background-color: #3a7bd5;
  margin: 20px auto;
  display: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.3s;
}

/* Game Containers */
.game-container {
  max-width: 500px;
  margin: auto;
  text-align: center;
  padding: 2rem;
}

/* Primary Buttons */
.btn-primary {
  background: linear-gradient(135deg, #00d2ff, #3a7bd5);
  color: white;
  border: none;
  padding: 12px 24px;
  font-size: 1.1rem;
  cursor: pointer;
  border-radius: 10px;
  transition: background 0.3s;
  margin-bottom: 1rem;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3a7bd5, #00d2ff);
}

/* Results */
.game-result {
  font-size: 1.1rem;
  margin-top: 1rem;
  color: #ffffff;
}

/* Back link */
.back-link {
  color: #00d2ff;
  text-decoration: none;
  font-weight: 500;
}

.back-link:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 600px) {
  .game-grid {
    grid-template-columns: 1fr;
  }
}