/* 2048 Game CSS - Knative Edition */

html, body {
    margin: 0;
    padding: 20px;
    background: #faf8ef;
    color: #776e65;
    font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif;
    font-size: 18px;
}

body {
    margin: 80px 0;
}

.heading {
    margin-bottom: 30px;
}

h1.title {
    font-size: 80px;
    font-weight: bold;
    margin: 0;
    display: inline-block;
}

.container {
    width: 500px;
    margin: 0 auto;
}

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

.header h1 {
    color: #776e65;
    font-size: 80px;
    font-weight: bold;
    margin: 0;
}

.environment-badge {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
    text-transform: uppercase;
    color: white;
    margin-left: 20px;
}

.environment-badge.development {
    background: #ff6b6b;
}

.environment-badge.staging {
    background: #ffa726;
}

.environment-badge.production {
    background: #66bb6a;
}

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

.score-container {
    position: relative;
    display: inline-block;
    background: #bbada0;
    padding: 10px 20px;
    font-size: 25px;
    height: 60px;
    line-height: 47px;
    font-weight: bold;
    border-radius: 3px;
    color: white;
    text-align: center;
    min-width: 80px;
}

.score-title {
    position: absolute;
    width: 100%;
    top: 10px;
    left: 0;
    text-transform: uppercase;
    font-size: 13px;
    line-height: 13px;
    text-align: center;
    color: #eee4da;
}

.score {
    font-size: 25px;
}

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

.game-intro {
    line-height: 1.65;
    margin: 0;
    flex: 1;
    margin-right: 20px;
}

.restart-button {
    display: inline-block;
    background: #8f7a66;
    border-radius: 3px;
    padding: 0 20px;
    text-decoration: none;
    color: #f9f6f2;
    height: 40px;
    line-height: 42px;
    border: none;
    cursor: pointer;
    font-size: 18px;
}

.restart-button:hover {
    background: #9f8a76;
}

.game-container {
    position: relative;
    padding: 15px;
    cursor: default;
    user-select: none;
    touch-action: none;
    background: #bbada0;
    border-radius: 10px;
    width: 500px;
    height: 500px;
    box-sizing: border-box;
}

.game-message {
    display: none;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(255, 255, 255, 0.73);
    z-index: 100;
    text-align: center;
    border-radius: 10px;
}

.game-message p {
    font-size: 60px;
    font-weight: bold;
    height: 60px;
    line-height: 60px;
    margin-top: 150px;
}

.game-message .lower {
    display: block;
    margin-top: 30px;
}

.game-message a {
    display: inline-block;
    background: #8f7a66;
    border-radius: 3px;
    padding: 0 20px;
    text-decoration: none;
    color: #f9f6f2;
    height: 40px;
    line-height: 42px;
    margin-left: 9px;
}

.game-won {
    background: rgba(237, 194, 46, 0.5);
    color: #f9f6f2;
}

.game-won .game-message p {
    color: #f9f6f2;
}

.game-over {
    background: rgba(238, 228, 218, 0.73);
    color: #776e65;
}

.game-over .game-message p {
    color: #776e65;
}

.grid-container {
    position: absolute;
    z-index: 1;
}

.grid-row {
    margin-bottom: 15px;
}

.grid-row:last-child {
    margin-bottom: 0;
}

.grid-cell {
    width: 106.25px;
    height: 106.25px;
    background: rgba(238, 228, 218, 0.35);
    border-radius: 6px;
    margin-right: 15px;
    float: left;
}

.grid-cell:last-child {
    margin-right: 0;
}

.tile-container {
    position: absolute;
    z-index: 2;
}

.tile {
    width: 106.25px;
    height: 106.25px;
    background: #eee4da;
    color: #776e65;
    border-radius: 6px;
    font-weight: bold;
    text-align: center;
    vertical-align: middle;
    line-height: 106.25px;
    font-size: 55px;
    position: absolute;
    transition: 0.15s ease-in-out;
    transform-origin: center center;
}

.tile-2 { background: #eee4da; color: #776e65; }
.tile-4 { background: #ede0c8; color: #776e65; }
.tile-8 { color: #f9f6f2; background: #f2b179; }
.tile-16 { color: #f9f6f2; background: #f59563; }
.tile-32 { color: #f9f6f2; background: #f67c5f; }
.tile-64 { color: #f9f6f2; background: #f65e3b; }
.tile-128 { color: #f9f6f2; background: #edcf72; font-size: 45px; }
.tile-256 { color: #f9f6f2; background: #edcc61; font-size: 45px; }
.tile-512 { color: #f9f6f2; background: #edc850; font-size: 45px; }
.tile-1024 { color: #f9f6f2; background: #edc53f; font-size: 35px; }
.tile-2048 { color: #f9f6f2; background: #edc22e; font-size: 35px; }

.tile-super { color: #f9f6f2; background: #3c3a32; font-size: 30px; }

.tile-new {
    animation: appear 200ms ease-in-out;
    animation-fill-mode: backwards;
}

.tile-merged {
    z-index: 20;
    animation: pop 200ms ease-in-out;
    animation-fill-mode: backwards;
}

@keyframes appear {
    0% {
        opacity: 0;
        transform: scale(0);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

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

.game-explanation {
    margin-top: 30px;
    text-align: center;
    color: #776e65;
}

.game-explanation p {
    margin: 10px 0;
}

.keep-playing-button, .retry-button {
    display: inline-block;
    background: #8f7a66;
    border-radius: 3px;
    padding: 0 20px;
    text-decoration: none;
    color: #f9f6f2;
    height: 40px;
    line-height: 42px;
    border: none;
    cursor: pointer;
    font-size: 18px;
    margin: 0 5px;
}

.keep-playing-button:hover, .retry-button:hover {
    background: #9f8a76;
}

/* Responsive design */
@media screen and (max-width: 520px) {
    .container {
        width: 280px;
        margin: 0 auto;
    }
    
    .header h1 {
        font-size: 50px;
    }
    
    .scores-container {
        flex-direction: column;
        gap: 5px;
    }
    
    .above-game {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }
    
    .game-container {
        width: 280px;
        height: 280px;
        padding: 10px;
    }
    
    .grid-cell {
        width: 60px;
        height: 60px;
        margin-right: 10px;
        margin-bottom: 10px;
    }
    
    .tile {
        width: 60px;
        height: 60px;
        line-height: 60px;
        font-size: 35px;
    }
    
    .tile-128, .tile-256, .tile-512 {
        font-size: 25px;
    }
    
    .tile-1024, .tile-2048 {
        font-size: 20px;
    }
    
    .tile-super {
        font-size: 18px;
    }
}