:root {
  --font-family: 'Inter', system-ui, Avenir, Helvetica, Arial, sans-serif;
  --bg-color: #f0f4f8;
  --text-color: #2c3e50;

  /* Pop Colors */
  --pop-pink: #ff6b6b;
  --pop-blue: #4ecdc4;
  --pop-yellow: #ffe66d;
  --pop-purple: #6c5ce7;
  --pop-green: #2ecc71;
  --pop-orange: #ff9f43;
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-width: 320px;
  min-height: 100vh;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
}

#root {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
}

* {
  box-sizing: border-box;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.25s;
}

button:hover {
  border-color: #646cff;
}

a {
  text-decoration: none;
  color: inherit;
}

/* App.css Content */
.logo {
  height: 6em;
  padding: 1.5em;
  will-change: filter;
  transition: filter 300ms;
}
.logo:hover {
  filter: drop-shadow(0 0 2em #646cffaa);
}
.logo.react:hover {
  filter: drop-shadow(0 0 2em #61dafbaa);
}

@keyframes logo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: no-preference) {
  a:nth-of-type(2) .logo {
    animation: logo-spin infinite 20s linear;
  }
}

.card {
  padding: 2em;
}

.read-the-docs {
  color: #888;
}

/* Shared Game Styles */
.game-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.game-nav {
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  border-bottom: 2px solid rgba(0,0,0,0.05);
  background-color: white;
}

.back-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: bold;
  color: #666;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  background-color: #f8f9fa;
  text-decoration: none;
}

.game-container {
  flex: 1;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* Dashboard Styles */
.dashboard-header {
  margin-bottom: 3rem;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
  padding: 0 1rem;
}

.game-card-link {
  display: block;
  text-decoration: none;
  height: 100%;
}

.game-card {
  background-color: white;
  border-radius: 20px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  height: 100%;
  border-width: 2px;
  border-style: solid;
}

.game-card:hover {
  transform: translateY(-5px);
}

.game-card-icon {
  padding: 1rem;
  border-radius: 50%;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Utility */
.hidden {
  display: none !important;
}

/* 2048 Colors */
.tile-2 { background-color: #eee4da; color: #776e65; }
.tile-4 { background-color: #ede0c8; color: #776e65; }
.tile-8 { background-color: #f2b179; color: #f9f6f2; }
.tile-16 { background-color: #f59563; color: #f9f6f2; }
.tile-32 { background-color: #f67c5f; color: #f9f6f2; }
.tile-64 { background-color: #f65e3b; color: #f9f6f2; }
.tile-128 { background-color: #edcf72; color: #f9f6f2; }
.tile-256 { background-color: #edcc61; color: #f9f6f2; }
.tile-512 { background-color: #edc850; color: #f9f6f2; }
.tile-1024 { background-color: #edc53f; color: #f9f6f2; }
.tile-2048 { background-color: #edc22e; color: #f9f6f2; }

/* Memory Game */
.memory-card {
    height: 100px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    transition: transform 0.6s, background-color 0.3s;
    transform-style: preserve-3d;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.memory-card.flipped {
    transform: rotateY(180deg);
    background-color: white;
}

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

.memory-card:not(.flipped) .memory-card-front {
    display: none;
}