/* Font, background, and basic colors */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    text-align: center;
    padding: 20px;
    background: #fafafa;
    color: #333;
    margin: 0;
}
h1 {
    margin-bottom: 6px;
    color: #2c3e50;
}
p {
    color: #555;
    font-size: 1.1em;
    margin-top: 5px;
}

/* Category Buttons Grid */
.category-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin: 25px auto;
    max-width: 800px;
}
.category-buttons button {
    padding: 15px;
    font-size: 1.1em;
    font-weight: bold;
    border: 2px solid #ccc;
    border-radius: 12px;
    background-color: #f7f7f7;
    color: #333;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s, border-color 0.2s;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.category-buttons button:hover {
    background-color: #e9e9e9;
    border-color: #007bff;
}
.category-buttons button:active {
    transform: translateY(2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

/* Game word display area */
#word {
    font-size: 2.2em;
    margin: 20px 0 5px;
    font-weight: bold;
    color: #0056b3;
    min-height: 1.3em;
}
#translation {
    font-size: 1.8em;
    margin: 2px 0;
    color: #777;
}
#romanization {
    font-size: 1.6em;
    margin: 2px 0 15px;
    color: #555;
    font-style: italic;
}

/* Input field */
#input {
    font-size: 1.6em;
    padding: 12px;
    width: 85%;
    max-width: 450px;
    margin-bottom: 15px;
    text-align: center;
    border: 2px solid #ccc;
    border-radius: 10px;
    outline: none;
    transition: border-color 0.2s;
}
#input:focus {
    border-color: #007bff;
}

/* Action buttons */
.actions {
    margin: 15px 0 10px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}
button.action {
    padding: 12px 20px;
    font-size: 1.1em;
    border-radius: 10px;
    border: none;
    color: #fff;
    cursor: pointer;
    box-shadow: 0 3px 6px rgba(0,0,0,.15);
    transition: background-color 0.2s, transform 0.1s;
    flex-grow: 1;
    max-width: 180px;
}
button.action:hover { filter: brightness(95%); }
button.action:active { transform: translateY(1px); }

.primary { background: #4CAF50; }
.secondary { background: #1976d2; }
.neutral { background: #616161; }

/* Message and counter */
#message {
    margin-top: 15px;
    font-weight: bold;
    min-height: 28px;
    font-size: 1.2em;
}
.counter {
    font-size: 0.95em;
    color:#555;
    margin-top:8px;
}

/* Keyboard layout */
h2 {
    margin-top: 30px;
    color: #2c3e50;
}
.keyboard {
    margin: 8px 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
}
.keyboard button {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 1.3em;
    margin: 0;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid #ddd;
    background: #fff;
    cursor: pointer;
    min-width: 58px;
    box-shadow: 0 2px 4px rgba(0,0,0,.08);
    transition: background-color 0.1s, transform 0.1s;
    flex-grow: 1;
    max-width: 80px;
}
.keyboard button span.roman {
    font-size: 0.65em;
    color: #888;
    line-height: 1;
    margin-top: 3px;
}
.keyboard button:active {
    background: #e8e8e8;
    transform: translateY(1px);
    box-shadow: 0 1px 2px rgba(0,0,0,.08);
}

/* Special keys */
.keyboard button[onclick="backspace()"],
.keyboard button[onclick="space()"],
.keyboard button[onclick="enter()"] {
    min-width: 100px;
    flex-grow: 1.5;
    background: #f0f0f0;
    border-color: #bbb;
}

/* Link style */
.promo-link {
    display: block;
    margin-top: 40px;
    padding: 20px;
    background-color: #ffeb3b;
    border-radius: 12px;
    text-decoration: none;
    color: #2c3e50;
    font-weight: bold;
    font-size: 1.2em;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.promo-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.25);
}

/* Responsive design */
@media (max-width: 768px) {
    .category-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 480px) {
    .category-buttons {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 600px) {
    body { padding: 10px; }
    h1 { font-size: 1.8em; }
    p { font-size: 1em; }
    #word { font-size: 1.8em; }
    #translation { font-size: 1.4em; }
    #romanization { font-size: 1.2em; }
    #input { font-size: 1.3em; padding: 10px; }
    button.action { font-size: 1em; padding: 10px 15px; max-width: none; }
    .keyboard button { font-size: 1.1em; padding: 10px 12px; min-width: 45px; max-width: none; }
    .keyboard button span.roman { font-size: 0.55em; }
    .keyboard button[onclick="backspace()"],
    .keyboard button[onclick="space()"],
    .keyboard button[onclick="enter()"] { min-width: 80px; }
}