body,
html {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
}

#controls {
    margin-top: 30px;
    z-index: 10;
    display: flex;
    gap: 10px;
}

#controls input,
#controls button {
    padding: 8px 16px;
    font-size: 16px;
    cursor: pointer;
}

#container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
}

.letter {
    position: absolute;
    font-size: 2.5rem;
    font-weight: bold;
    cursor: grab;
    user-select: none;
    pointer-events: auto;
    padding: 5px;
    color: #333;
}

.letter:active {
    cursor: grabbing;
}

.letter.selected {
    color: #ff4757;
}

#selectionBox {
    position: absolute;
    border: 2px dashed #007bff;
    background-color: rgba(0, 123, 255, 0.1);
    pointer-events: none;
    z-index: 5;
}