* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem;
    margin-bottom: 2rem;
    border-radius: 5px;
}

header h1 {
    margin-bottom: 1rem;
    text-align: center;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 3px;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: #34495e;
}

.section {
    background-color: white;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 3px;
    font-size: 1rem;
}

button {
    background-color: #2c3e50;
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #34495e;
}

.hint {
    color: #666;
    font-style: italic;
    margin-bottom: 1rem;
}

#loginResult,
#pingResult,
#fileResult {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 3px;
}

.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

pre {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 3px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.file-content {
    max-height: 400px;
    overflow-y: auto;
} 

/* Banner de Seguridad Ofensiva Avanzada */
.course-banner {
    width: 100%;
    margin: 2rem auto;
    overflow: hidden;
    border-radius: 6px;
    background-color: #050b10;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.18);
}

.course-banner img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}

@media (max-width: 768px) {
    .course-banner {
        margin-top: 1.25rem;
        border-radius: 4px;
    }
}