/* General Styles */
body {
    font-family: Arial, sans-serif;
    background-color: #0d0d0d;
    color: #fff;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

a {
    color: #00ffff;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #8000ff;
}

/* Header Section */
header {
    padding: 20px;
    background: linear-gradient(to right, #00ffff, #8000ff);
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    color: #00ffff;
    margin: 0;
}

header p {
    font-size: 1.2rem;
    color: #fff;
    margin: 5px 0;
}

/* Navigation Bar */
nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    background: #222;
    margin: 0;
}

nav ul li {
    margin: 10px;
}

nav ul li a {
    color: #00ffff;
    text-decoration: none;
    font-size: 1.1rem;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #8000ff;
}

/* Binomial Expander Section */
.binomial-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background: #1a1a1a;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
    text-align: center;
}

.binomial-container h1 {
    color: #00ffff;
}

.binomial-container label {
    color: #fff;
}

.binomial-container input {
    background: #333;
    color: #fff;
    border: 1px solid #00ffff;
    border-radius: 5px;
    padding: 10px;
    font-size: 16px;
}

.binomial-container button {
    background: #8000ff;
    color: #fff;
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.binomial-container button:hover {
    background: #00ffff;
}

#identity {
    color: #00ffff;
    font-size: 1.2rem;
    margin-top: 20px;
}

/* Footer Section */
footer {
    text-align: center;
    padding: 20px;
    background: #222;
    margin-top: 40px;
}

footer p {
    margin: 0;
    color: #fff;
}