/* --- Global Styles & Body --- */
:root {
    /* Define a color palette for consistency */
    --color-dark-bg: #1e1e2e;       /* Dark background */
    --color-content-bg: #282a36;    /* Slightly lighter container background (Dracula theme-inspired) */
    --color-light-text: #f8f8f2;    /* Light text */
    --color-accent-blue: #50fa7b;   /* Green accent (for VS Code link/VS list) */
    --color-accent-red: #ff5555;    /* Red accent (for Notepad++ link/NP list) */
    --color-hyperlink: #bd93f9;     /* Purple for regular links */
    --color-headsup: #ffb86c;       /* Orange for warnings/headsup */
}

body {
    font-family: 'Consolas', 'Roboto', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--color-dark-bg);
    color: var(--color-light-text);
    line-height: 1.6;
    padding: 20px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* --- Header Styles --- */
.header-with-logo {
    display: flex; /* Use flexbox to align logo and h1 */
    align-items: center; /* Vertically align them */
    justify-content: center; /* Center them horizontally */
    background-color: #1a1a2e;
    border-radius: 8px;
    margin: 0 0 15px 0;
    padding: 15px 0;
}

.header-logo {
    height: 60px; /* Increased size for a more prominent logo */
    width: auto; /* Maintain aspect ratio */
    margin-right: 15px; /* Space between logo and h1 */
    vertical-align: middle; /* Align with text baseline */
    box-shadow: 0 0 10px rgba(189, 147, 249, 0.7); /* Subtle glow for the logo */
    border-radius: 5px; /* Slightly rounded corners for the logo */
}

h1 {
    margin: 0; /* Remove default h1 margin to align with logo */
    font-family: 'Impact', 'Arial Narrow Bold', sans-serif;
    color: var(--color-light-text);
    text-shadow: 0 0 10px var(--color-accent-blue), 0 0 20px var(--color-accent-red);
    letter-spacing: 3px;
    /* Removed background-color and border-radius from h1 as it's now on .header-with-logo */
}

h3 {
    text-align: center;
    text-decoration: none;
    color: var(--color-hyperlink);
    padding: 10px 0 20px 0;
    font-size: 1.6rem;
}

/* --- Layout (Flexbox) --- */
.main-content-wrapper {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    align-items: flex-start;
}

.div1 {
    /* Main Content Area */
    flex: 2; /* Takes up more space */
    min-width: 300px;
    padding: 25px;
    background-color: var(--color-content-bg);
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
}

.sidebar {
    /* Sidebar for Images */
    flex: 1;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    gap: 40px;
    padding-top: 25px;
}

/* --- List & Typography Styles --- */
p {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

ol, ul {
    margin-left: 20px;
    padding-left: 0;
}

li {
    margin-bottom: 15px;
}

.vs {
    color: var(--color-accent-blue);
    font-size: 1.4rem;
    font-weight: bold;
    list-style-type: '🚀 ';
}

.np {
    color: var(--color-accent-red);
    font-size: 1.4rem;
    font-weight: bold;
    list-style-type: '📝 ';
}

.headsup {
    color: var(--color-headsup);
    font-style: italic;
    display: block;
    margin-top: 10px;
    padding: 10px;
    border: 1px dashed var(--color-headsup);
    border-radius: 5px;
}

/* --- Image Styles --- */
.div2, .div3 {
    display: flex;
    justify-content: center;
}

.img1, .img2 {
    max-width: 100%;
    height: auto;
    border: 3px solid var(--color-hyperlink);
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(189, 147, 249, 0.5);
    transition: transform 0.3s ease-in-out;
}
.img1:hover, .img2:hover {
    transform: scale(1.05);
}

/* --- Link & Button Styles --- */
.download {
    text-decoration: none;
    color: var(--color-accent-blue);
    font-weight: bold;
    border-bottom: 2px dotted var(--color-accent-blue);
    transition: color 0.3s;
}

.download:hover {
    color: var(--color-hyperlink);
    border-bottom-color: var(--color-hyperlink);
}

.btn-default {
    background-color: var(--color-hyperlink);
    border: none;
    padding: 10px 20px;
    margin: 15px 5px;
    border-radius: 25px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.btn-default:hover {
    background-color: #e6e6fa; /* Light color on hover */
    transform: translateY(-2px);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
}

.next-page, .previous {
    text-decoration: none;
    font-size: 1.1rem;
    color: var(--color-dark-bg);
    font-weight: bold;
    display: block;
    padding: 0;
}

/* Custom Previous Button */
button[href="introduction-to-html.html"] {
    background-color: var(--color-content-bg);
    border: 1px solid var(--color-hyperlink);
}
button[href="introduction-to-html.html"]:hover {
    background-color: #44475a;
}
button[href="introduction-to-html.html"] a {
    color: var(--color-light-text);
}


/* --- Pagination Styles --- */
.goto {
    font-size: 1.3rem;
    margin-top: 40px;
    display: block;
    font-weight: bold;
    border-bottom: 2px solid var(--color-accent-blue);
    padding-bottom: 5px;
    margin-bottom: 15px;
}

.pagination-lg {
    list-style-type: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.page-link, .pageactive-link {
    display: inline-block;
    padding: 8px 12px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: bold;
    transition: background-color 0.3s, color 0.3s;
    border: 1px solid transparent;
}

.page-link {
    background-color: var(--color-dark-bg);
    color: var(--color-accent-blue);
    border: 1px solid var(--color-accent-blue);
}

.page-link:hover {
   background-color: var(--color-accent-blue);
   color: var(--color-dark-bg);
}

.pageactive-link {
    /* Active page */
    color: var(--color-dark-bg);
    background-color: var(--color-hyperlink);
    border: 1px solid var(--color-hyperlink);
}

/* --- Media Queries for Responsiveness --- */
@media (max-width: 768px) {
    .main-content-wrapper {
        flex-direction: column;
    }
    .div1, .sidebar {
        width: 100%;
        min-width: unset;
        padding: 15px;
    }
    .sidebar {
        flex-direction: row; /* Puts images side-by-side on mobile */
        justify-content: space-around;
    }
    .img1, .img2 {
        max-width: 45%;
    }
    .header-logo {
        height: 45px; /* Increased size for a more prominent logo on mobile */
        margin-right: 10px;
    }
    h1 {
        font-size: 1.8rem;
    }
}