@keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

body {
    font-family: Arial, sans-serif;
    text-align: center;
    background: linear-gradient(-45deg, #4facfe, #00f2fe, #ff758c, #ff7eb3);
    background-size: 400% 400%;
    animation: gradientAnimation 8s ease infinite;
    color: #333;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: #fff;
    padding: 20px 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 400px;
}

h1 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.instructions {
    font-size: 1rem;
    margin-bottom: 20px;
}

.game-box {
    margin: 20px 0;
}

input[type="number"] {
    width: 80%;
    padding: 10px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-bottom: 10px;
}

button {
    padding: 10px 20px;
    font-size: 1rem;
    background-color: #4caf50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

.hidden {
    display: none;
}

.feedback {
    font-size: 1.2rem;
    margin: 15px 0;
    font-weight: bold;
}

.attempts {
    color: #555;
}