body {
    font-family: sans-serif;
    background-color: #f0f0f0;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

.screen {
    display: none;
    width: 100%;
    max-width: 800px;
    padding: 20px;
    box-sizing: border-box;
    text-align: center;
}

.screen.active {
    display: block;
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
}

.overlay.active {
    display: flex;
}

.overlay-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    margin: 5px;
}

button.completed {
    background-color: #a0a0a0;
    color: #fff;
}

button:hover {
    background-color: #45a049;
}

#game-area {
    display: flex;
    flex-direction: column;
}

#letter-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr); /* Default, will be updated by JS */
    gap: 5px;
    margin-bottom: 20px;
}

.grid-tile {
    width: 100%;
    aspect-ratio: 1 / 1;
    background-color: #fff;
    border: 1px solid #ccc;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5em;
    font-weight: bold;
    user-select: none;
}

.grid-tile.selected {
    background-color: #aadeff;
}

.grid-tile.found {
    background-color: #c8ffc8;
}

#word-list-container {
    text-align: left;
}

#word-list {
    list-style-type: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
}

#word-list li {
    margin: 5px 10px;
    font-size: 1.2em;
}

#word-list li.found {
    text-decoration: line-through;
    color: #888;
}

/* High Contrast Mode */
body.high-contrast {
    background-color: #000;
    color: #fff;
}

.high-contrast .overlay-content,
.high-contrast .grid-tile {
    background-color: #333;
    color: #fff;
    border-color: #fff;
}

.high-contrast .grid-tile.selected {
    background-color: #00ffff;
    color: #000;
}

.high-contrast .grid-tile.found {
    background-color: #ffff00;
    color: #000;
}

.high-contrast button {
    background-color: #ffc107;
    color: #000;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.3s ease-in-out;
}

/* Responsive Design */
@media (min-width: 600px) {
    #game-area {
        flex-direction: row;
    }

    #letter-grid {
        width: 60%;
        margin-right: 20px;
        margin-bottom: 0;
    }

    #word-list-container {
        width: 40%;
    }
}