body {
    background-color: #0a0a0a;
    color: #0f0;
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.login-container {
    background-color: #1a1a1a;
    padding: 2rem;
    border: 2px solid #0f0;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.5);
    text-align: center;
}

h1 { text-transform: uppercase; letter-spacing: 2px; }
p { color: #888; margin-bottom: 2rem; }

input {
    display: block;
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    background: #000;
    border: 1px solid #0f0;
    color: #0f0;
    box-sizing: border-box;
}

button {
    background-color: #0f0;
    color: #000;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
}

button:hover { background-color: #0a0; }

.error-box {
    background-color: #500;
    color: #f00;
    padding: 10px;
    border: 1px solid #f00;
    margin-bottom: 15px;
}