/* 2048.css */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #faf8ef;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  font-family: "Segoe UI", "Clear Sans", "Helvetica Neue", Arial, sans-serif;
  user-select: none;
  padding: 0;
}

.container {
  text-align: center;
  max-width: 560px;
  width: 100%;
  padding: 20px;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.title {
  font-size: 3.5rem;
  font-weight: bold;
  color: #776e65;
}

.scores {
  display: flex;
  gap: 10px;
}

.score-box {
  background: #bbada0;
  color: #fff;
  border-radius: 6px;
  padding: 10px 25px;
  text-align: center;
  min-width: 90px;
}

.score-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  opacity: 0.7;
}

.score-value {
  font-size: 1.6rem;
  font-weight: bold;
}

.board {
  background: #bbada0;
  border-radius: 10px;
  padding: 10px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: 10px;
  width: 100%;
  aspect-ratio: 1;
  margin-bottom: 15px;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

.tile {
  background: rgba(238, 228, 218, 0.35);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  font-weight: bold;
  color: #776e65;
  transition: all 0.1s ease;
  aspect-ratio: 1;
}

.tile[data-value="2"] {
  background: #eee4da;
}
.tile[data-value="4"] {
  background: #ede0c8;
}
.tile[data-value="8"] {
  background: #f2b179;
  color: #f9f6f2;
}
.tile[data-value="16"] {
  background: #f59563;
  color: #f9f6f2;
}
.tile[data-value="32"] {
  background: #f67c5f;
  color: #f9f6f2;
}
.tile[data-value="64"] {
  background: #f65e3b;
  color: #f9f6f2;
}
.tile[data-value="128"] {
  background: #edcf72;
  color: #f9f6f2;
  font-size: 1.8rem;
}
.tile[data-value="256"] {
  background: #edcc61;
  color: #f9f6f2;
  font-size: 1.8rem;
}
.tile[data-value="512"] {
  background: #edc850;
  color: #f9f6f2;
  font-size: 1.8rem;
}
.tile[data-value="1024"] {
  background: #edc53f;
  color: #f9f6f2;
  font-size: 1.5rem;
}
.tile[data-value="2048"] {
  background: #edc22e;
  color: #f9f6f2;
  font-size: 1.5rem;
}
.tile[data-value="4096"] {
  background: #3c3a32;
  color: #f9f6f2;
  font-size: 1.3rem;
}
.tile[data-value="8192"] {
  background: #3c3a32;
  color: #f9f6f2;
  font-size: 1.3rem;
}

@keyframes pop {
  0% {
    transform: scale(0);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}

.new-game-btn {
  padding: 10px 25px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s;
  background: #8f7a66;
  color: #f9f6f2;
}
.new-game-btn:hover {
  background: #9f8b77;
}

.back-btn {
  padding: 10px 25px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s;
  background: #bbada0;
  color: #f9f6f2;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.back-btn:hover {
  background: #cbbeb0;
}

.undo-btn {
  background: #bbada0;
  color: #f9f6f2;
}
.undo-btn:hover {
  background: #cbbeb0;
}

.controls {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.info {
  margin-top: 5px;
  font-size: 0.85rem;
}

.game-over-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  background: rgba(238, 228, 218, 0.73);
}

.game-over-box {
  border-radius: 10px;
  padding: 40px 50px;
  text-align: center;
  background: #fff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.game-over-box h2 {
  font-size: 2rem;
  margin-bottom: 15px;
  color: #776e65;
}

.game-over-box p {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: #776e65;
}

.game-over-btns {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.btn-cancel {
  background: #cdc1b4;
  color: #776e65;
}
.btn-cancel:hover {
  background: #bdb0a3;
}

.hidden {
  display: none !important;
}

@media (max-width: 500px) {
  .title {
    font-size: 2.2rem;
  }
  .tile {
    font-size: 1.4rem;
  }
  .tile[data-value="128"],
  .tile[data-value="256"],
  .tile[data-value="512"] {
    font-size: 1.1rem;
  }
  .tile[data-value="1024"],
  .tile[data-value="2048"] {
    font-size: 1rem;
  }
  .tile[data-value="4096"],
  .tile[data-value="8192"] {
    font-size: 0.85rem;
  }
  .score-value {
    font-size: 1.2rem;
  }
  .score-box {
    padding: 6px 14px;
    min-width: 60px;
  }
}