/* General page styling */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-align: center;
    background: #0d1117; /* Dark background */
    margin: 0;
    padding: 20px;
    color: #c9d1d9; /* Soft text color */
}

/* Heading */
h1 {
    color: #58a6ff; /* Cobalt accent */
    font-size: 2.5rem;
    margin-bottom: 10px;
}

p {
    color: #8b949e;
    font-size: 1.1rem;
}

/* Grid container */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 15px;
    justify-content: center;
    max-width: 500px;
    margin: 30px auto;
}

/* Letter buttons */
button {
    width: 80px;
    height: 80px;
    font-size: 24px;
    font-weight: bold;
    border: none;
    border-radius: 12px;
    background: #1f6feb; /* Cobalt blue */
    color: white;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(31, 111, 235, 0.4);
    transition: transform 0.1s ease, background 0.3s, box-shadow 0.3s;
}

/* Button hover effect */
button:hover {
    background: #388bfd;
    box-shadow: 0 6px 12px rgba(31, 111, 235, 0.6);
}

/* Button click effect */
button:active {
    transform: translateY(2px);
    background: #1f6feb;
    box-shadow: 0 2px 6px rgba(31, 111, 235, 0.4);
}

/* Button focus (for keyboard press highlight) */
button:focus {
    outline: 3px solid #58a6ff;
    outline-offset: 2px;
}