/* body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
} */
body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background: #f9f9f9;
    color: #333;
}

.container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-form, .protected-content {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    text-align: center;
}

.login-form h2 {
    margin-bottom: 30px;
    color: #333;
}

.login-form input[type="password"] {
    width: 100%;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    margin-bottom: 20px;
    box-sizing: border-box;
}

.login-form button, .logout-btn {
    width: 100%;
    padding: 15px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.login-form button:hover, .logout-btn:hover {
    background: #5a67d8;
}

.error {
    background: #ffe6e6;
    color: #d32f2f;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
    border: 1px solid #ffcdd2;
}

.protected-content h1 {
    color: #4caf50;
    margin-bottom: 20px;
}

.logout-btn {
    margin-top: 30px;
    background: #f44336;
}

.logout-btn:hover {
    background: #d32f2f;
}


#language-switcher {
    margin-bottom: 20px;
}
button {
    margin-right: 10px;
    padding: 8px 12px;
}
section {
    background: #fff;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
img.section-image {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 4px;
    margin-top: 15px;
}
h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    color: #1a1a1a;
}
h2, h3 {
    color: #2c3e50;
}
#toc {
    background: #eef;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
}
#toc ul {
    list-style-type: none;
    padding-left: 0;
}
#toc li {
    margin-bottom: 5px;
}
@media (max-width: 768px) {
    body {
    margin: 10px;
    }
    img.section-image {
    width: 100%;
    }
}



.framed-list {
    border: 2px solid #ccc;
    border-radius: 8px;
    padding: 1em 1.5em;
    background-color: #f9f9f9;
    margin-top: 1em;
    margin-bottom: 1em;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  }

  .spaced-list li {
    margin-bottom: 0.75em;
    line-height: 1.5;
  }


.list-intro {
    font-weight: bold;
    margin-bottom: 0.75em;
  }