body {
    font-family: "Roboto", sans-serif;
    text-align: center;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 20px;
    font-size: 2em;
}

main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-bottom: 150px; /* Space for hint box and letter bank */
}

.hint-box {
    background-color: #FFFFE0;
    border: 2px solid #000;
    padding: 15px;
    display: inline-block;
    border-radius: 10px;
    font-size: 1.2em;
    position: fixed;
    bottom: 150px;
    width: 100%;
    left: 0;
}

.word {
    display: inline-block;
    font-size: 2em;
    margin-top: 20px;
}

.word span {
    border-bottom: 3px solid black;
    margin: 0 10px;
    padding: 0 10px;
}

.letter-bank {
    position: fixed;
    bottom: 0;
    width: 100%;
    background-color: #FFF;
    padding: 20px;
    box-shadow: 0px -5px 10px rgba(0,0,0,0.1);
}

.letter-bank button {
    font-size: 1.5em;
    margin: 10px;
    padding: 10px 15px;
    cursor: pointer;
}

/* Explanation box at the top right corner */
.explanation-box {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #FFB6C1;
    border: 2px solid #000;
    padding: 10px;
    border-radius: 10px;
    width: 250px;
    text-align: left;
    font-size: 1em;
    box-shadow: 0px 5px 10px rgba(0, 0, 0, 0.1);
}