/*
 * Path of the Dragon - Website Stylesheet
 * Author: Jóhann Haukur Gunnarsson
 *
 * Default styling assumes the dark theme.
 */

/* --- 1. CSS Custom Properties (Non-color variables) --- */
:root {
    /* Typography */
    --body-font: 'EB Garamond', 'Cormorant Garamond', serif;
    --base-font-size: 20px;
    --base-line-height: 1.6;
    --reading-width: 68ch;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Layout */
    --max-width: 800px;
    --content-padding: 1.6rem; /* further reduced to tighten outer card padding */

    /* Base palette (dark defaults so pages work even without .dark-mode) */
    --background-color: #070503;
    --text-color: #f4f4f4;
    --text-color-em: #dddddd;
    --text-color-strong: #f6efe1;
    --heading-color: #a56f17;
    --link-color: #a56f17;
    --link-hover-color: #d49a3a;
    --border-color: rgba(255, 255, 255, 0.1);
    --copyright-color: #888;
    --highlight-bg-color: rgba(165, 111, 23, 0.5);
    --list-marker-color: #a56f17;
    --shadow-color: rgba(0, 0, 0, 0.3);

    /* Typography accents */
    --blockquote-font: 'Cormorant Garamond', 'EB Garamond', serif;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border radius */
    --border-radius: 4px;
    --border-radius-lg: 8px;
}

/* Dark mode theme */
.dark-mode {
    /* Re-define here for clarity/future theming, but :root already holds dark defaults */
    --background-color: #070503;
    --text-color: #f4f4f4;
    --text-color-em: #dddddd;
    --text-color-strong: #f6efe1;
    --heading-color: #a56f17;
    --link-color: #a56f17;
    --link-hover-color: #d49a3a;
    --border-color: rgba(255, 255, 255, 0.1);
    --copyright-color: #888;
    --highlight-bg-color: rgba(165, 111, 23, 0.5);
    --list-marker-color: #a56f17;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

/* --- 2. CSS Reset & Base Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--base-font-size);
    scroll-behavior: smooth;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: var(--body-font);
    line-height: var(--base-line-height);
    font-weight: 400;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    background-attachment: fixed;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

body.dark-mode {
    background-image: linear-gradient(rgba(7, 5, 3, 0.95), rgba(7, 5, 3, 0.95)), url('images/webbg.png');
}

/* --- 3. Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--body-font);
    color: var(--heading-color);
    line-height: 1.3;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
    scroll-margin-top: 6rem;
}

h1 {
    font-size: 2.8em;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2.2em;
    margin-top: var(--spacing-xxl);
}

h3 {
    font-size: 1.75em;
    margin-top: var(--spacing-xl);
}

h4 {
    font-size: 1.5em;
}

h5 {
    font-size: 1.25em;
}

h6 {
    font-size: 1.1em;
}

.chapter-content > h1:first-child,
.chapter-content > h2:first-child,
.chapter-content > .part-title:first-child,
.blog-post-content > h1:first-child {
    margin-top: 0;
}

/* Constrain top-level headings to the same reading width
   as paragraphs and section bands for consistent horizontal
   rhythm inside the chapter card. */
.chapter-content > h1,
.chapter-content > h2,
.chapter-content > h3,
.chapter-content > h4,
.chapter-content > h5,
.chapter-content > h6,
.blog-post-content > h1,
.blog-post-content > h2,
.blog-post-content > h3,
.blog-post-content > h4,
.blog-post-content > h5,
.blog-post-content > h6 {
    max-width: var(--reading-width);
    margin-left: 0;
    margin-right: auto;
}

/* Tighten vertical rhythm between Part title and chapter title */
.chapter-content .part-title + h2 {
    margin-top: var(--spacing-md);
}

/* Give the opening "From My Heart" chapter a little extra
   weight when present, without changing the underlying
   document structure. */
body.from-my-heart-page .chapter-content > h2.from-my-heart-heading {
    font-size: 2.5em;
    text-align: center;
    letter-spacing: 0.04em;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

body.from-my-heart-page .chapter-content blockquote:first-of-type {
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    border-left-width: 3px;
    box-shadow: 0 10px 22px rgba(0, 0, 0, 0.6);
    background: radial-gradient(
        circle at top left,
        rgba(165, 111, 23, 0.12),
        rgba(0, 0, 0, 0.4)
    );
}

body.from-my-heart-page .chapter-section:first-of-type {
    margin-top: var(--spacing-xl);
}

p {
    margin-bottom: 1.35em;
    max-width: var(--reading-width);
    margin-left: auto;
    margin-right: auto;
    padding: 0.1em 0.6em;
    border-radius: var(--border-radius);
    transition: background-color var(--transition-fast);
}

/* Paragraphs that are direct children of list items should sit a bit
   closer to their nested lists than standalone paragraphs do. */
.chapter-content li > p {
    margin-bottom: 0.35em;
}

/* Tighter spacing for manual line breaks used inside paragraphs (e.g., litany-style lines) */
.chapter-content br {
    line-height: 1.1;
}

/* Litany-style short, single-sentence paragraphs that appear
   in a run (tagged via script.js as .litany-line) should sit
   closer together so they read as a chant instead of fully
   separated blocks. */
.chapter-content p.litany-line {
    margin-bottom: 1.05em;
    line-height: 1.5;
    letter-spacing: 0.01em;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color var(--transition-normal);
}

a:hover {
    color: var(--link-hover-color);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--link-color);
    outline-offset: 2px;
}

/* Strong and emphasis styling */
strong, b {
    font-weight: 800;
    color: var(--text-color-strong);
}

em, i {
    font-style: italic;
    color: var(--text-color-em);
}

/* Emphasis inside headings: softer highlight than heading gold, not pure white */
h1 em, h1 i,
h2 em, h2 i,
h3 em, h3 i,
h4 em, h4 i,
h5 em, h5 i,
h6 em, h6 i {
    color: #d7a95a;
}

/* Combination of strong and emphasis */
strong em, em strong, b i, i b {
    font-weight: 800;
    font-style: italic;
    color: var(--text-color-strong);
}

/* Lists */
ul, ol {
    margin-bottom: 1.35em;
    padding-left: 2em;
    max-width: var(--reading-width);
    margin-left: auto;
    margin-right: auto;
}

ul li {
    list-style-type: disc;
    margin-bottom: 0.2em;
}

ol li {
    list-style-type: decimal;
    margin-bottom: 0.2em;
}

li::marker {
    color: var(--list-marker-color);
}

/* Nested lists */
ul ul, ol ol, ul ol, ol ul {
    margin-top: 0.2em;
    margin-bottom: 0.8em;
}

blockquote {
    margin: var(--spacing-md) 0 var(--spacing-sm);
    padding: calc(var(--spacing-xs) * 1.5) calc(var(--spacing-md) * 0.85);
    border-left: 2px solid rgba(165, 111, 23, 0.5);
    border-radius: var(--border-radius-lg);
    color: #f5efe4;
    font-family: var(--blockquote-font);
    font-style: normal;
    font-size: 1.02em;
    background: rgba(255, 255, 255, 0.03);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.5);
    max-width: var(--reading-width);
    line-height: 1.5;
}

blockquote p:last-child {
    margin-bottom: 0;
}

blockquote p {
    margin-bottom: 1.05em;
    padding-left: 0.4em;
    padding-right: 0.4em;
}

blockquote strong,
blockquote b,
blockquote strong em,
blockquote em strong,
blockquote b i,
blockquote i b {
    color: #fffaf0;
}

/* Preserve intentional emphasis inside blockquotes without making the whole
   quote slanted by default. */
blockquote em,
blockquote i {
    font-style: italic;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    max-width: var(--reading-width);
    margin-left: auto;
    margin-right: auto;
}

th,
td {
    padding: 0.75em 1em;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    vertical-align: top;
}

thead th {
    background-color: rgba(165, 111, 23, 0.2);
    color: var(--text-color);
    font-weight: 700;
}

tbody tr:nth-child(even) td {
    background-color: rgba(255, 255, 255, 0.02);
}

tbody tr:hover td {
    background-color: rgba(165, 111, 23, 0.12);
}

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: var(--spacing-lg) auto;
    width: 50%;
}

figure {
    margin: var(--spacing-xl) auto;
    text-align: center;
    max-width: var(--reading-width);
}

figure img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 12px 24px var(--shadow-color);
}

figure figcaption {
    margin-top: var(--spacing-sm);
    color: var(--copyright-color);
    font-size: 0.95rem;
    max-width: 64ch;
    margin-left: auto;
    margin-right: auto;
}

/* Code and pre-formatted text */
code {
    font-family: 'Courier New', monospace;
    background-color: var(--highlight-bg-color);
    padding: 0.2em 0.4em;
    border-radius: var(--border-radius);
    font-size: 0.9em;
}

pre {
    background-color: var(--highlight-bg-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: var(--spacing-md) 0;
}

pre code {
    background-color: transparent;
    padding: 0;
}

/* --- 4. Layout Components --- */
.main-header {
    padding: var(--spacing-sm) 0 var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background: radial-gradient(circle at 0 0, rgba(165, 111, 23, 0.2), rgba(7, 5, 3, 0.98));
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6);
    position: relative;
    z-index: 1;
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    max-width: var(--max-width);
    margin: 0 auto;
}

.main-nav a {
    margin: 0 var(--spacing-xs);
    font-family: var(--body-font);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    border: 1px solid transparent;
    background-color: transparent;
    transition: background-color var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal), transform var(--transition-fast);
}

.main-nav a:first-child {
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.08em;
}

.main-nav a:hover {
    background-color: rgba(165, 111, 23, 0.24);
    border-color: rgba(165, 111, 23, 0.5);
    text-decoration: none;
    transform: translateY(-1px);
}

main {
    max-width: var(--max-width);
    margin: var(--spacing-sm) auto var(--spacing-xl);
    padding: calc(var(--spacing-md) * 0.8) calc(var(--content-padding) * 0.8);
    flex: 1;
    position: relative;
    z-index: 1;
}

.chapter-content {
    padding: calc(var(--spacing-md) * 0.8) calc(var(--spacing-lg) * 0.8);
    padding-bottom: calc(var(--spacing-xl) * 0.8);
    background: radial-gradient(circle at 20% 0, rgba(255, 255, 255, 0.03), rgba(7, 5, 3, 0.98));
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.65);
}

.chapter-content p,
.chapter-content ul,
.chapter-content ol,
.chapter-content figure,
.blog-post-content p,
.blog-post-content ul,
.blog-post-content ol,
.blog-post-content figure {
    margin-left: 0;
    margin-right: auto;
}

.chapter-content blockquote {
    margin-left: 0;
    margin-right: auto;
}

.blog-post-content blockquote {
    margin-left: 0;
    margin-right: auto;
}

.chapter-section {
    max-width: var(--reading-width);
    margin: var(--spacing-lg) auto var(--spacing-md);
    padding: calc(var(--spacing-sm) * 0.8) calc(var(--spacing-lg) * 0.8) calc(var(--spacing-sm) * 0.6);
    border-radius: var(--border-radius-lg);
    background: linear-gradient(to right, rgba(255, 255, 255, 0.015), transparent);
    border-left: 1px solid rgba(255, 255, 255, 0.06);
}

.chapter-section:first-of-type {
    margin-top: var(--spacing-md);
}

/* Tighter rhythm where sections meet horizontal rules */
.chapter-section + hr,
hr + .chapter-section {
    margin-top: var(--spacing-md);
}

.chapter-section-h3 {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-xs);
}

.chapter-section-h3 > h3:first-child {
    margin-top: 0;
}

hr + .chapter-section-h3 {
    margin-top: var(--spacing-sm);
}

/* Virtual sections created between <hr> markers:
   give the opening line a gentle visual lift so
   it reads like a soft subheading without adding
   real heading markup. */
.chapter-section-virtual p:first-of-type::first-line {
    font-weight: 500;
    letter-spacing: 0.03em;
    color: var(--text-color-strong);
}

.chapter-section-virtual p:first-of-type::first-letter {
    font-size: 1.18em;
    padding-right: 0.03em;
}

footer {
    max-width: var(--max-width);
    margin: 4rem auto var(--spacing-xl) auto;
    padding: 0 var(--content-padding);
    text-align: center;
    font-size: 0.9em;
    color: var(--copyright-color);
    padding-top: var(--spacing-lg);
    margin-top: auto;
    background: radial-gradient(circle at 50% 0, rgba(255, 255, 255, 0.02), rgba(7, 5, 3, 0.98));
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    box-shadow: 0 -10px 24px rgba(0, 0, 0, 0.65);
    position: relative;
    z-index: 1;
}

/* --- Ambient “virtual particle” background (desktop only) --- */
.particle-layer {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(246, 239, 225, 1), rgba(246, 239, 225, 0));
    opacity: 0;
    animation: particle-fade 1.4s ease-out forwards;
}

.particle--blue {
    background: radial-gradient(circle, rgba(140, 188, 255, 0.95), rgba(140, 188, 255, 0));
}

@media (prefers-reduced-motion: reduce) {
    .particle-layer,
    .particle,
    .awareness-thread {
        display: none !important;
        animation: none !important;
    }
}

@keyframes particle-fade {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    20% {
        opacity: 0.7;
        transform: scale(0.9);
    }
    80% {
        opacity: 0.4;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(1.1);
    }
}

/* --- 5. Navigation Components --- */

/* Subtle vertical “awareness thread” that tracks focus
   from the header down toward the current reading depth. */
.awareness-thread {
    position: fixed;
    width: 2px;
    height: 0;
    border-radius: 999px;
    background: linear-gradient(
        to bottom,
        rgba(250, 215, 150, 0.0),
        rgba(250, 215, 150, 0.35),
        rgba(250, 215, 150, 0.9)
    );
    box-shadow: 0 0 14px rgba(250, 215, 150, 0.55);
    opacity: 0;
    pointer-events: none;
    z-index: 0;
    transition: opacity 0.3s ease-out;
}

.awareness-thread::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(
        to right,
        rgba(250, 215, 150, 0.9),
        rgba(250, 215, 150, 0.0)
    );
    box-shadow: 0 0 10px rgba(250, 215, 150, 0.45);
    transform-origin: left center;
    transform: translateX(3px) rotate(11deg);
}


.chapter-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--content-padding);
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
}

.prev-link,
.next-link {
    color: var(--link-color);
    text-decoration: none;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    transition: background-color var(--transition-normal);
    max-width: 48%;
}

.prev-link::before {
    content: '←';
    font-size: 1.2em;
}

.next-link::after {
    content: '→';
    font-size: 1.2em;
}

.prev-link:hover,
.next-link:hover {
    background-color: var(--highlight-bg-color);
    text-decoration: none;
}

/* Handle single navigation link cases */
.chapter-nav .prev-link:only-child,
.chapter-nav .next-link:only-child {
    max-width: none;
}

/* Mobile responsiveness for navigation */
@media (max-width: 768px) {
    .chapter-nav {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-md) var(--content-padding);
        margin: var(--spacing-md) auto;
    }

    .prev-link,
    .next-link {
        max-width: 100%;
        justify-content: center;
        font-size: 0.9rem;
        padding: var(--spacing-sm);
    }
}

.footer-nav {
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-nav a {
    color: var(--link-color);
    text-decoration: none;
    padding: 0.35rem 0.75rem;
    display: inline-block;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 0.9rem;
    transition: background-color var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal), transform var(--transition-fast);
}

.footer-nav a:hover {
    background-color: rgba(165, 111, 23, 0.24);
    border-color: rgba(165, 111, 23, 0.5);
    text-decoration: none;
    transform: translateY(-1px);
}

.footer-copyright {
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--body-font);
    font-style: italic;
    margin: 0;
    text-align: center;
}

/* --- 6. Glossary & Interactive Elements --- */
.glossary-link {
    border-bottom: 1px dotted var(--link-color);
    text-decoration: none;
    font-weight: bold;
    transition: all var(--transition-normal);
}

.glossary-link:hover {
    background-color: var(--link-color);
    color: var(--background-color);
    border-bottom: 1px solid var(--link-color);
    padding: 0.1em 0.3em;
    border-radius: var(--border-radius);
}

.highlight-anchor {
    animation: highlight-fade 2.5s ease-out;
    scroll-margin-top: 5rem;
}

@keyframes highlight-fade {
    from {
        background-color: var(--highlight-bg-color);
    }
    to {
        background-color: transparent;
    }
}

/* Subtle paragraph hover for pointer devices */
@media (hover: hover) and (pointer: fine) {
    .chapter-content p:hover,
    .blog-post-content p:hover {
        background-color: rgba(255, 255, 255, 0.03);
    }
}

/* --- Blog Index & TOC Layout --- */
.toc-page main {
    max-width: 960px;
}

.blog-page main {
    max-width: var(--max-width);
    margin: var(--spacing-xs) auto var(--spacing-xl);
}

.toc-page .chapter-content {
    max-width: 960px;
    margin: var(--spacing-md) auto var(--spacing-xl);
    padding: var(--spacing-lg) var(--content-padding);
}

.blog-post-content {
    max-width: var(--max-width);
    margin: var(--spacing-md) auto var(--spacing-xl);
    padding: var(--spacing-lg) var(--content-padding);
    background: radial-gradient(circle at 20% 0, rgba(255, 255, 255, 0.03), rgba(7, 5, 3, 0.98));
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.65);
}

.toc-page .chapter-content h1 {
    text-align: center;
    margin-top: 0;
    margin-bottom: var(--spacing-xl);
}

.blog-post-content h1 {
    text-align: left;
    margin-top: 0;
    margin-bottom: var(--spacing-lg);
    font-size: 2.2em;
}

.blog-index {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.blog-summary {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: radial-gradient(circle at 0 0, rgba(165, 111, 23, 0.08), rgba(7, 5, 3, 0.96));
    box-shadow: 0 10px 22px rgba(0, 0, 0, 0.6);
}

.blog-summary h2 {
    margin-top: 0;
    font-size: 1.4rem;
}

.blog-summary h2 a {
    color: var(--text-color);
}

.blog-summary h2 a:hover {
    color: var(--link-hover-color);
}

.blog-summary .post-date {
    font-size: 0.9rem;
    color: var(--copyright-color);
    margin-bottom: var(--spacing-sm);
}

.blog-summary p {
    max-width: none;
    padding: 0;
    margin-bottom: var(--spacing-md);
}

.blog-summary .read-more {
    font-weight: 600;
}

.blog-summary hr {
    display: none;
}

@media (max-width: 768px) {
    .toc-page .chapter-content {
        padding: var(--spacing-md);
    }

    .toc-page .toc-grid {
        grid-template-columns: minmax(0, 1fr);
        max-width: 100%;
    }
}

/* --- 7. Lists & Table of Contents --- */
.toc-grid {
    margin: var(--spacing-xl) auto;
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    max-width: 1100px;
}

.toc-card {
    border: 1px solid rgba(255, 215, 165, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    background: radial-gradient(circle at 20% 20%, rgba(165, 111, 23, 0.12), rgba(7, 5, 3, 0.7));
    box-shadow: 0 12px 24px rgba(7, 5, 3, 0.55);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-height: 100%;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}


.toc-card-preface {
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 10px 20px rgba(7, 5, 3, 0.3);
}

.toc-card-void {
    background: rgba(0, 0, 0, 0.85);
    border-color: rgba(255, 255, 255, 0.18);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.6);
}

.toc-card h2 {
    margin: 0;
    font-size: 1.6rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #e9c27c;
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toc-list li {
    padding: 2px 0;
}

.toc-list li a {
    display: block;
    border-radius: var(--border-radius);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: transparent;
    color: var(--text-color);
    transition: background-color var(--transition-normal), color var(--transition-normal), transform var(--transition-fast);
}

.toc-list li a:hover {
    background-color: var(--highlight-bg-color);
    text-decoration: none;
    color: #fdf6e3;
    transform: translateX(4px);
}

.toc-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.6);
    border-color: rgba(255, 215, 165, 0.4);
}

/* Illustration helper for constrained images */
.illustration {
    margin: var(--spacing-xl) auto;
    text-align: center;
    max-width: min(720px, 100%);
}

.illustration img {
    display: block;
    max-width: min(720px, 100%);
    height: auto;
    margin: 0 auto;
}

.illustration figcaption {
    margin-top: var(--spacing-sm);
    color: var(--copyright-color);
    font-size: 0.95rem;
}

.contact-form {
    margin: var(--spacing-xl) auto;
    max-width: 600px;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    background: radial-gradient(circle at 20% 20%, rgba(165, 111, 23, 0.12), rgba(7, 5, 3, 0.75));
    box-shadow: 0 10px 24px var(--shadow-color);
}

.contact-form .form-field {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.contact-form label {
    font-weight: 600;
    color: var(--heading-color);
}

.contact-form input,
.contact-form textarea {
    padding: 0.6rem 0.75rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: rgba(7, 5, 3, 0.9);
    color: var(--text-color);
    font-family: var(--body-font);
    font-size: 1rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: 2px solid var(--link-color);
    outline-offset: 2px;
}

.contact-submit {
    margin-top: var(--spacing-md);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    border: none;
    font-weight: 700;
    font-family: var(--body-font);
    background-color: var(--link-color);
    color: #0b0907;
    cursor: pointer;
    transition: background-color var(--transition-normal), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-submit:hover {
    background-color: var(--link-hover-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px var(--shadow-color);
}

.contact-submit:focus {
    outline: 2px solid var(--link-hover-color);
    outline-offset: 2px;
}

.contact-note {
    margin-top: var(--spacing-md);
    font-size: 0.95rem;
    color: var(--copyright-color);
}

.contact-status {
    margin: var(--spacing-md) auto 0 auto;
    max-width: 600px;
    font-size: 0.95rem;
    text-align: left;
}

.contact-status.success {
    color: #9fe6b8;
}

.contact-status.error {
    color: #ffb3b3;
}


/* --- 8. Part Title Styling --- */
.part-title {
    font-family: var(--body-font);
    font-size: 2.5rem;
    font-weight: 700;
    color: #b58a4a;
    text-align: center;
    margin: 3rem 0 2rem 0;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: none;
}

/* Part title in dark mode */
.dark-mode .part-title {
    color: #ddb67a;
    text-shadow: none;
}

/* --- 9. Accessibility Features --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode for better accessibility */
@media (prefers-contrast: more) {
    :root {
        --text-color: #dddddd;
        --background-color: #000000;
        --link-color: #ffcc00;
        --link-hover-color: #dddddd;
        --border-color: rgba(255, 255, 255, 0.3);
        --heading-color: #ffcc00;
        --highlight-bg-color: rgba(255, 204, 0, 0.3);
    }

    .part-title {
        color: #ffcc00 !important;
        text-shadow: none;
    }

    .part-title::before {
        background: repeating-linear-gradient(
                90deg,
                transparent,
                transparent 10px,
                #ffcc00 10px,
                #dddddd 12px
        ) !important;
    }
}

/* --- 10. Responsive Design --- */
@media (max-width: 768px) {
    :root {
        --base-font-size: 16px;
        --content-padding: 1.5rem;
    }

    main {
        margin: var(--spacing-md) auto;
        padding: var(--spacing-md) var(--content-padding);
    }

    h1 {
        font-size: 2.2em;
    }

    h2 {
        font-size: 1.8em;
    }

    h3 {
        font-size: 1.5em;
    }

    h4 {
        font-size: 1.3em;
    }

    .main-nav {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .main-nav a {
        display: block;
        width: 100%;
        text-align: center;
        padding: 0.75rem;
    }

    body {
        background-attachment: scroll;
    }

    ul, ol {
        padding-left: 1.5em;
    }

    /* Responsive adjustments for part title */
    .part-title {
        font-size: 2rem;
        letter-spacing: 2px;
        margin: 1.5rem 0 2rem 0;
    }

    .part-title::before,
    .part-title::after {
        width: 60px;
    }
}

@media (max-width: 480px) {
    :root {
        --base-font-size: 14px;
        --content-padding: 1rem;
    }

    main {
        padding: var(--spacing-md) var(--content-padding);
    }

    h1 {
        font-size: 2em;
    }

    h2 {
        font-size: 1.6em;
    }

    h3 {
        font-size: 1.4em;
    }

    h4 {
        font-size: 1.2em;
    }

    .main-header {
        padding: var(--spacing-xs) 0;
    }

    .main-nav {
        justify-content: center;
        gap: var(--spacing-xs);
    }

    .main-nav a {
        padding: 0.3rem 0.6rem;
        font-size: 0.85rem;
    }

    .main-nav a:first-child {
        font-size: 0.9rem;
        letter-spacing: 0.06em;
    }

    .footer-nav {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .footer-nav a {
        padding: var(--spacing-xs);
    }

    .part-title {
        font-size: 1.8rem;
        letter-spacing: 1px;
        margin: 1rem 0 1.5rem 0;
    }

    .part-title::before,
    .part-title::after {
        width: 50px;
    }
}

/* --- 11. Print Styles --- */
@media print {
    body {
        background: white !important;
        color: black !important;
        font-size: 12pt;
        line-height: 1.5;
    }

    .main-header,
    .chapter-nav,
    .footer-nav {
        display: none;
    }

    a {
        color: black !important;
        text-decoration: underline;
    }

    h1, h2, h3, h4, h5, h6 {
        color: black !important;
        page-break-after: avoid;
    }

    .part-title {
        color: black !important;
        text-shadow: none !important;
    }

    .part-title::before,
    .part-title::after {
        background: linear-gradient(90deg, transparent, black, transparent) !important;
    }

    p {
        orphans: 3;
        widows: 3;
    }

    strong, b {
        color: black !important;
    }

    em, i {
        color: black !important;
    }
}

/* --- Floating Side Navigation (Dynamic Sizing) --- */
.side-nav-link {
    position: fixed;
    top: 0;
    z-index: 100;

    /* DYNAMIC SIZING: Fill the entire side margins */
    height: 100vh;
    width: calc((100vw - var(--max-width)) / 2);

    /* Center the arrow vertically */
    display: flex;
    align-items: center;

    /* Make the link itself invisible */
    background-color: transparent;
    text-decoration: none;
}

.side-nav-link.prev {
    left: 0;
    justify-content: flex-start; /* Align arrow to the left */
}

.side-nav-link.next {
    right: 0;
    justify-content: flex-end; /* Align arrow to the right */
}

/* The visible arrow element (wrapped in a span) */
.side-nav-link span {
    color: var(--link-color);
    font-size: 4rem;
    font-weight: 300;
    padding: 1rem 1.5rem;
    margin: 0 2rem; /* Space from the edge of the screen */
    border-radius: var(--border-radius-lg);

    /* Animation: invisible and slightly scaled down by default */
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.2s ease-in-out;
}

/* On hover of the large side area, make the arrow appear */
.side-nav-link:hover span {
    opacity: 1;
    transform: scale(1);
    background-color: var(--highlight-bg-color);
}

/* Hide the side navigation on tablets and mobile devices */
@media (max-width: 1100px) {
    .side-nav-link {
        display: none;
    }
}

/* --- 12. Mobile-Specific Optimizations --- */

/* Only apply these styles on screens smaller than, say, 768px */
@media (max-width: 768px) {
    body.dark-mode {
        /*
         * For mobile, DO NOT load the large background image.
         * A simple background color is much faster and saves data.
         * The gradient is gone, but the performance gain is worth it.
         */
        background-image: none;
        background-color: var(--background-color); /* Fallback to the solid color */
    }

    /* You could also opt for a simple, fast-loading gradient */
    /*
    body.dark-mode {
       background-image: linear-gradient(rgba(10, 8, 5, 0.98), rgba(7, 5, 3, 0.98));
    }
    */
}