/*
|--------------------------------------------------------------------------
| UNIFIED LESSON STYLE (DARK MODE / RESPONSIVE)
|--------------------------------------------------------------------------
| This CSS file combines and refactors all necessary styles for a consistent, 
| modern, and fully responsive design across all HTML lesson pages.
*/

/* --- Global Variables (Color Palette: Dracula-inspired Dark Mode) --- */
:root {
    --color-dark-bg: #1e1e2e;       /* Deep dark background */
    --color-content-bg: #282a36;    /* Container/Card background */
    --color-light-text: #f8f8f2;    /* Primary text color */
    --color-accent-blue: #50fa7b;   /* Green accent (for highlights/links) */
    --color-accent-red: #ff5555;    /* Red accent (for warnings/highlights) */
    --color-hyperlink: #bd93f9;     /* Purple for active links/buttons */
    --color-headsup: #ffb86c;       /* Orange for emphasis */
}

/* --- Base Body & Text Styles --- */
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;
    font-size: 1.1rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); /* Subtle depth */
}

/* --- Header & Title Styles (Center Aligned) --- */
.header-with-logo {
    display: flex;
    align-items: center;
    justify-content: center; /* <<< CENTERING THE LOGO AND H1 */
    background-color: #1a1a2e;
    border-radius: 8px;
    margin: 0 0 15px 0;
    padding: 15px 0;
}

.header-logo {
    height: 60px;
    width: auto;
    margin-right: 15px;
    /* Using a shadow that matches the purple hyperlink color */
    box-shadow: 0 0 10px rgba(189, 147, 249, 0.7); 
    border-radius: 5px;
}

h1 {
    margin: 0;
    font-family: 'Impact', 'Arial Narrow Bold', sans-serif;
    color: var(--color-light-text);
    /* Neon glow effect for the main title */
    text-shadow: 0 0 10px var(--color-accent-blue), 0 0 20px var(--color-accent-red); 
    letter-spacing: 3px;
    font-size: 2.5rem;
}

h3 {
    text-align: center; /* <<< CENTERING THE SUBTITLE */
    color: var(--color-hyperlink);
    padding: 10px 0 20px 0;
    font-size: 1.6rem;
    margin-top: 0;
}

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

.content-area {
    /* Main Content (70% on desktop) */
    flex: 2; 
    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-area {
    /* Sidebar (30% on desktop) */
    flex: 1;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-top: 25px;
    /* Optional: give the sidebar a distinct background if needed, or leave it transparent */
}

/* --- Typography & Specific Classes (Unified for all pages) --- */
p {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.span1 { /* Main topic header text (e.g., "What is HTML?") - Red Accent */
    font-size: 2.0rem;
    color: var(--color-accent-red);
    font-weight: bold;
    display: block;
    margin-bottom: 15px;
}

.span2 { color: var(--color-accent-blue); } /* Blue/Green highlights */
.span3 { color: var(--color-hyperlink); } /* Purple highlights */
.span4 { color: var(--color-accent-blue); } /* Aqua highlights (same as span2) */
.soyeah {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--color-light-text);
    margin-top: 40px;
}

/* Code Blocks */
.code-block {
    color: var(--color-accent-blue);
    display: block;
    white-space: pre;
    font-family: 'Consolas', monospace;
    background-color: #1a1a2e;
    padding: 15px;
    border-left: 5px solid var(--color-hyperlink);
    overflow-x: auto;
    margin: 15px 0;
    border-radius: 4px;
    font-size: 1rem;
}

/* Syntax Highlighting for Tags Page */
.opening { color: var(--color-accent-blue); font-weight: bold; }
.closing { color: #ff79c6; font-weight: bold; } /* Pink */
.content { color: var(--color-headsup); font-weight: bold; } /* Orange */

/* Lists */
ol, ul {
    margin-left: 20px;
    padding-left: 0;
}
li {
    margin-bottom: 15px;
}
.olli { color: var(--color-accent-red); font-size: 1.2rem; font-weight: bold; }
.ulli { color: var(--color-headsup); }
.vs { color: var(--color-accent-blue); list-style-type: '🚀 '; }
.np { color: var(--color-accent-red); list-style-type: '📝 '; }
.headsup { 
    color: var(--color-headsup); 
    font-style: italic;
    display: block;
    padding: 10px;
    border: 1px dashed var(--color-headsup);
    border-radius: 5px;
}

/* --- Image Styles --- */
img {
    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;
    display: block; 
    margin: 20px auto; 
}
img:hover {
    transform: scale(1.03);
}

/* Editor Specific Images (for code-editor.html) */
.img-editor {
    max-width: 100%;
    height: auto;
    border: 3px solid var(--color-accent-blue);
    margin: 20px 0;
}

/* --- Table Styles --- */
table {
    border: 1px solid var(--color-hyperlink);
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background-color: #1a1a2e;
}
th, td {
    padding: 12px;
    border: 1px solid var(--color-hyperlink);
    text-align: left;
    font-size: 1rem;
}
th {
    background-color: var(--color-hyperlink);
    color: var(--color-dark-bg);
    font-weight: bold;
}
tr {
    background-color: var(--color-content-bg);
    color: var(--color-light-text);
    transition: background-color 0.3s;
}
tr:hover {
    background-color: #383a48;
}

/* --- Link & Button Styles --- */
a {
    color: var(--color-accent-blue);
    text-decoration: none;
    transition: color 0.3s;
}
a:hover {
    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;
    display: inline-block;
}

.btn-default:hover {
    background-color: #e6e6fa;
    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;
}

/* 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;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: bold;
    border: 1px solid var(--color-accent-blue);
    background-color: var(--color-dark-bg);
    color: var(--color-accent-blue);
}

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

.pageactive-link {
    background-color: var(--color-hyperlink);
    color: var(--color-dark-bg);
    border-color: var(--color-hyperlink);
}

/* --- Media Queries for FULL Responsiveness (Mobile First) --- */
@media (max-width: 768px) {
    /* Main layout stacks vertically */
    .main-content-wrapper {
        flex-direction: column;
    }
    .content-area, .sidebar-area {
        width: 100%;
        min-width: unset;
        padding: 15px;
    }

    /* Header adjustments */
    .header-logo {
        height: 45px;
        margin-right: 10px;
    }
    h1 {
        font-size: 1.8rem;
    }

    /* Sidebar Image layout on mobile for code-editor */
    .sidebar-area {
        flex-direction: row; /* Puts images side-by-side */
        justify-content: space-around;
        padding-top: 0;
    }
    .img-editor {
        max-width: 45%;
        margin: 10px 0;
    }
    
    /* Table overflow (Makes tables vertically readable on small screens) */
    table, thead, tbody, th, td, tr {
		display: block;
	}
	thead tr {
		position: absolute;
		top: -9999px;
		left: -9999px;
	}
	tr { border: 1px solid var(--color-hyperlink); margin-bottom: 10px;}
	td { 
		border: none;
		border-bottom: 1px solid #eee;
		position: relative;
		padding-left: 50% !important; 
		text-align: right !important;
	}
	td:before {
		content: attr(data-label);
		position: absolute;
		left: 6px;
		width: 45%;
		padding-right: 10px;
		white-space: nowrap;
        font-weight: bold;
        color: var(--color-accent-red);
	}
}

/* 1. Default/Mobile Settings (Applies to ALL devices unless overridden) */
/* Setting 360px width and 225px height for the video element */
#my-video {
    width: 360px !important;
    height: 240px !important;
}

/* Ensure the Video.js container uses the same size */
.video-js {
    width: 360px !important;
    height: 240px !important;
}

/* 2. Desktop Override (Applies when the screen width is 1024px or larger) */
/* This will automatically switch to the maximum size for high CPM */
@media screen and (min-width: 1024px) {
    /* 1280px width (with a standard 16:9 height of 720px) */
    #my-video {
        width: 1024px !important;
        height: 768px !important;
    }

    /* Ensure the Video.js container uses the same size */
    .video-js {
        width: 1024px !important;
        height: 768px !important;
    }
}