body.theme-ubuntu {
    background-image: url(ubuntu_theme.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

body.theme-hacker {
    background: #073307;
    background: radial-gradient(circle, rgba(7, 51, 7, 1) 0%, rgba(0, 0, 0, 1) 100%);
}

body.theme-kali {
    background: #14a1ff;
    background: radial-gradient(circle, rgba(20, 161, 255, 1) 0%, rgb(0, 40, 52) 100%);
}

body {
    background: var(--login-bg);
    background-size: cover;
    background-position: center;
}

.login-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0;
    padding: 40px;
    width: 350px;
    max-width: 90vw;
}

.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    display: block;
    color: #aaaaaa;
    font-size: 0.9rem;
    margin-bottom: 6px;
    font-family: monospace;
}

.input-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #555555;
    border-radius: 0;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
    font-family: monospace;
    font-size: 1rem;
    box-sizing: border-box;
}

.input-group input:focus {
    outline: none;
    border-color: var(--text-color);
}

.error {
    color: #ff4444;
    font-size: 0.8rem;
    font-family: monospace;
    display: block;
    margin-top: 4px;
    min-height: 1em;
}

#login-form button {
    border-radius: 0;
    width: 100%;
    padding: 8px;
    border: none;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
    font-family: monospace;
    border: 1px solid #555555;
    font-size: 1.2rem;
    cursor: pointer;
    margin-top: 20px;
    margin-bottom: 20px;
}

#login-form button:hover {
    opacity: 0.7;
}