/* Headings */
#mainContainer {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    font-family: var(--font-primary);
}

#mainContainer h1 {
    font-size: 2.6em;
    font-weight: 700;
    color: var(--accent-color);
    margin: 1.5em 0 0.75em 0;
    padding-bottom: 0.3em;
    line-height: 1.2;
    text-align: center;
}

#mainContainer h2 {
    font-size: 2.2em;
    font-weight: 600;
    color: #4a90e2;
    margin: 1.3em 0 0.6em 0;
    padding-bottom: 0.2em;
    border-bottom: 2px solid #4a90e2;
    line-height: 1.3;
}

#mainContainer h3 {
    font-size: 1.8em;
    font-weight: 600;
    color: #7bb3f0;
    margin: 1.2em 0 0.5em 0;
    line-height: 1.4;
}

/* Dark theme heading adjustments */
[data-theme="dark"] #mainContainer h2 {
    color: #6bb6ff;
    border-bottom-color: #6bb6ff;
}

[data-theme="dark"] #mainContainer h3 {
    color: #85c1ff;
}

/* Paragraphs */
#mainContainer p {
    margin: 1em 0;
    text-align: justify;
    line-height: 1.8;
    font-size: 1.3em;
}

/* Links */
#mainContainer a {
    color: var(--accent-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-bottom-color 0.2s ease;
}

#mainContainer a:hover {
    border-bottom-color: var(--accent-color);
}

/* Emphasis */
#mainContainer em {
    font-style: italic;
    color: var(--text-primary);
}

#mainContainer strong {
    font-weight: 700;
    color: var(--text-primary);
}

/* Code */
#mainContainer code {
    background: rgba(0, 0, 0, 0.05);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 1em;
    color: #d73a49;
}

[data-theme="dark"] #mainContainer code {
    color: #ff7b7b;
}

/* Code blocks */
#mainContainer pre {
    background: #f8f9fa;
    border: 1px solid #e1e4e8;
    border-radius: 6px;
    padding: 1em;
    overflow-x: auto;
    margin: 1.5em 0;
}

[data-theme="dark"] #mainContainer pre {
    background: #2d3748;
    border-color: #4a5568;
}

#mainContainer pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 1em;
}

/* Lists */
#mainContainer ul, #mainContainer ol {
    margin: 1em 0;
    padding-left: 2em;
    font-size: 1.3em;
}

#mainContainer li {
    margin: 0.3em 0;
    line-height: 1.6;
}

#mainContainer ul li {
    list-style-type: disc;
}

#mainContainer ol li {
    list-style-type: decimal;
}

/* Nested lists */
#mainContainer ul ul, #mainContainer ol ol, #mainContainer ul ol, #mainContainer ol ul {
    margin: 0.3em 0;
    font-size: 1em;
}

/* Blockquotes */
#mainContainer blockquote {
    border-left: 4px solid var(--accent-color);
    margin: 1.5em 0;
    padding: 0.5em 0 0.5em 1.5em;
    color: var(--text-secondary);
    font-style: italic;
    background: rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] #mainContainer blockquote {
    background: rgba(255, 255, 255, 0.05);
}

/* Tables */
#mainContainer table {
    border-collapse: collapse;
    width: 100%;
    margin: 1.5em 0;
    font-size: 1em;
}

#mainContainer th, #mainContainer td {
    border: 1px solid #ddd;
    padding: 0.6em 1em;
    text-align: left;
}

#mainContainer th {
    background: #f8f9fa;
    font-weight: 600;
    color: var(--text-primary);
}

[data-theme="dark"] #mainContainer th {
    background: #2d3748;
}

[data-theme="dark"] #mainContainer th,
[data-theme="dark"] #mainContainer td {
    border-color: #4a5568;
}

/* Horizontal rule */
#mainContainer hr {
    border: none;
    height: 2px;
    background: linear-gradient(to right, var(--accent-color), transparent);
    margin: 2em 0;
}

/* Images */
#mainContainer img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin: 1em 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] #mainContainer img {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* Math expressions */
#mainContainer .math {
    color: var(--accent-color);
    font-weight: 500;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    #mainContainer h1 {
        font-size: 2.2em;
    }
    
    #mainContainer h2 {
        font-size: 1.8em;
    }
    
    #mainContainer h3 {
        font-size: 1.5em;
    }
    
    #mainContainer ul, #mainContainer ol {
        padding-left: 1.5em;
    }
    
    #mainContainer table {
        font-size: 0.9em;
    }
    
    #mainContainer th, #mainContainer td {
        padding: 0.4em 0.6em;
    }
}