body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #6dd5ed 0%, #2193b0 100%);
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.top-bar {
    width: 100%;
    background: #222c;
    padding: 16px 0;
    text-align: center;
    font-size: 1.5em;
    color: #fff;
    box-shadow: 0 2px 8px #0002;
}
.coin-counter {
    display: inline-block;
    background: #222;
    color: #ffd700;
    padding: 8px 24px;
    border-radius: 24px;
    font-weight: bold;
    font-size: 1.2em;
}
.game-main {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    margin-top: 32px;
    gap: 32px;
}
.tile-palette {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 140px;
}
.palette-tile {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px #0001;
    padding: 12px 16px;
    cursor: pointer;
    font-size: 1.1em;
    border: 2px solid transparent;
    transition: border 0.2s, background 0.2s;
}
.palette-tile.selected {
    border: 2px solid #2196f3;
    background: #e3f2fd;
}
.palette-tile .cost {
    background: #388e3c;
    color: #fff;
    border-radius: 6px;
    padding: 2px 8px;
    font-size: 0.95em;
    margin-left: 8px;
}
#board {
    display: grid;
    grid-template-columns: repeat(6, 48px);
    grid-template-rows: repeat(6, 48px);
    gap: 6px;
    background: #fff8;
    border-radius: 12px;
    box-shadow: 0 2px 12px #0002;
    padding: 12px;
}
.board-cell {
    width: 48px;
    height: 48px;
    background: #e0e0e0;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    cursor: pointer;
    transition: background 0.2s;
}
.board-cell.placed {
    background: #b3e5fc;
    cursor: default;
}
.win-message {
    position: fixed;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #222;
    color: #fff;
    padding: 32px 48px;
    border-radius: 16px;
    font-size: 2em;
    box-shadow: 0 4px 32px #0008;
    z-index: 1000;
    text-align: center;
}
@media (max-width: 700px) {
    .game-main {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    #board {
        grid-template-columns: repeat(6, 36px);
        grid-template-rows: repeat(6, 36px);
        padding: 6px;
    }
    .board-cell {
        width: 36px;
        height: 36px;
        font-size: 1.1em;
    }
    .tile-palette {
        min-width: 100px;
    }
}