.game-container {
    width: min(90vw, 410px);
    margin: 0 auto;
    text-align: center;
    padding: min(5vw, 20px);
    padding-bottom: min(10vw, 40px);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: min(4vw, 20px);
}

.logo {
    text-align: left;
}

.logo-2048 {
    font-size: min(15vw, 60px);
    font-weight: bold;
    background: linear-gradient(to right, #f65e3b, #edcf72);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
    margin-bottom: min(2vw, 10px);
}

.subtitle {
    font-size: min(3.5vw, 14px);
    color: #776e65;
}

.scores-container {
    display: flex;
    gap: min(2vw, 10px);
}

.score-box {
    background: #bbada0;
    padding: min(2vw, 10px) min(3vw, 15px);
    border-radius: 5px;
    text-align: center;
    min-width: min(20vw, 80px);
}

.score-label {
    color: #eee4da;
    font-size: min(3vw, 12px);
    font-weight: bold;
}

#score {
    color: white;
    font-size: min(5vw, 20px);
    font-weight: bold;
}

#restart {
    background: #8f7a66;
    color: white;
    border: none;
    padding: min(2vw, 10px) min(4vw, 20px);
    font-size: min(4vw, 16px);
    border-radius: 5px;
    cursor: pointer;
    margin: min(3vw, 15px) 0;
    transition: background-color 0.15s ease;
}

#restart:hover {
    background: #7f6a56;
}

@media (max-width: 520px) {
    .game-container {
        width: min(90vw, 280px);
        padding: min(5vw, 5px);
    }

    .grid-container {
        gap: min(2vw, 5px);
        padding: min(2vw, 5px);
    }

    .tile {
        font-size: min(6vw, 18px);
    }

    #suggestion {
        font-size: min(4vw, 16px);
        margin-top: min(4vw, 10px);
    }
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: min(2vw, 10px);
    background-color: #bbada0;
    padding: min(2vw, 10px);
    border-radius: 6px;
    aspect-ratio: 1;
    width: 100%;
    touch-action: none; /* Prevent scrolling only on the game grid */
}

.tile {
    width: 100%;
    aspect-ratio: 1;
    background-color: #eee4da;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: min(6vw, 24px);
    font-weight: bold;
    border-radius: 5px;
    transition: all 0.15s ease-in-out;
    position: relative;
}

.tile.merged {
    animation: pop 0.15s ease-in-out;
}

.tile[data-value="2"] { background-color: #eee4da; }
.tile[data-value="4"] { background-color: #ede0c8; }
.tile[data-value="8"] { background-color: #f2b179; color: white; }
.tile[data-value="16"] { background-color: #f59563; color: white; }
.tile[data-value="32"] { background-color: #f67c5f; color: white; }
.tile[data-value="64"] { background-color: #f65e3b; color: white; }
.tile[data-value="128"] { background-color: #edcf72; color: white; }
.tile[data-value="256"] { background-color: #edcc61; color: white; }
.tile[data-value="512"] { background-color: #edc850; color: white; }
.tile[data-value="1024"] { background-color: #edc53f; color: white; }
.tile[data-value="2048"] { background-color: #edc22e; color: white; }

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

#suggestion {
    margin-top: min(4vw, 20px);
    font-size: min(4vw, 18px);
    color: #776e65;
}

.rules-container {
    margin-top: min(6vw, 30px);
    padding: min(4vw, 20px);
    background: rgba(238, 228, 218, 0.35);
    border-radius: 6px;
    text-align: left;
}

.rules-container h2 {
    color: #776e65;
    font-size: min(5vw, 20px);
    margin-bottom: min(3vw, 15px);
    text-align: center;
}

.rules {
    color: #776e65;
    font-size: min(3.5vw, 14px);
    line-height: 1.5;
}

.rules p {
    margin: min(2vw, 8px) 0;
}

.controls {
    margin-top: min(3vw, 15px);
    padding-top: min(3vw, 15px);
    border-top: 2px solid rgba(119, 110, 101, 0.15);
}

.controls p:first-child {
    font-weight: bold;
    margin-bottom: min(2vw, 8px);
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow-x: hidden;
    background: #faf8ef;
}