/* ============================================
   CSS Variables for Theme Management
   ============================================ */
:root {
    /* Light Mode (Default - Book-like) */
    --bg-color: #faf8f3;
    --text-color: #2c2c2c;
    --text-secondary: #5a5a5a;
    --accent-color: #8b7355;
    --link-color: #6b5d4f;
    --link-hover: #4a3f35;
    --border-color: #d4cfc7;
    --shadow: rgba(0, 0, 0, 0.08);
    
    /* Typography */
    --font-body: 'Lora', 'Noto Serif Devanagari', serif;
    --font-heading: 'Playfair Display', serif;
    --font-devanagari: 'Noto Serif Devanagari', serif;
}

body.night-mode {
    --bg-color: #1c1c1e;
    --text-color: #e8e8e8;
    --text-secondary: #b0b0b0;
    --accent-color: #c9a87c;
    --link-color: #d4b896;
    --link-hover: #e8d4b8;
    --border-color: #3a3a3c;
    --shadow: rgba(0, 0, 0, 0.3);
}

/* ============================================
   Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 18px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.8;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Theme Controls
   ============================================ */
.theme-controls {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    z-index: 1000;
}

.theme-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px var(--shadow);
}

.theme-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
    border-color: var(--accent-color);
}

.theme-btn:active {
    transform: translateY(0);
}

.theme-btn.active {
    background: var(--accent-color);
    color: var(--bg-color);
    border-color: var(--accent-color);
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 40px;
}

@media (max-width: 768px) {
    .container {
        padding: 40px 24px;
    }
    
    .theme-controls {
        top: 12px;
        right: 12px;
    }
}

/* ============================================
   Page Header
   ============================================ */
.page-header {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 60px;
    padding-bottom: 40px;
    border-bottom: 2px solid var(--border-color);
}

@media (min-width: 769px) {
    .page-header {
        display: grid;
        grid-template-columns: 1fr 200px;
        grid-template-areas:
            "title photo"
            "content photo";
        gap: 40px;
    }
    
    .page-header > .site-title,
    .page-header > .header-title {
        grid-area: title;
    }
    
    .page-header > .header-photo,
    .page-header > .header-slideshow {
        grid-area: photo;
    }
    
    .page-header > .header-content {
        grid-area: content;
    }
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.nav-links {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
}

.back-link,
.home-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--link-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.back-link:hover,
.home-link:hover {
    color: var(--link-hover);
}

.site-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-color);
    margin: 0;
}

@media (max-width: 768px) {
    .site-title {
        font-size: 2rem;
    }
}

.intro {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

.intro p {
    margin: 0.5em 0;
}

/* ============================================
   Social Links
   ============================================ */
.social-links {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.social-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 20px;
    text-decoration: none;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.social-icon:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

/* ============================================
   Header Photo & Slideshow
   ============================================ */
.header-photo {
    width: 200px;
    height: 200px;
    border-radius: 8px;
    overflow: hidden;
    border: 3px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow);
}

/* Home page photo is circular */
.header-photo.home-photo,
.header-slideshow.home-photo {
    border-radius: 50%;
}

.header-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.header-slideshow {
    width: 200px;
    height: 200px;
    border-radius: 8px;
    overflow: hidden;
    border: 3px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow);
}

.header-slideshow-inner {
    width: 100%;
    height: 100%;
}

@media (max-width: 768px) {
    .header-photo,
    .header-slideshow {
        width: 160px;
        height: 160px;
        margin: 0;
    }
}

/* ============================================
   Table of Contents Section
   ============================================ */
.toc-section {
    margin-top: 40px;
}

.toc-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-color);
}

.toc-links {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toc-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    color: var(--link-color);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s ease;
    font-size: 1.05rem;
}

.toc-link:hover {
    background: var(--border-color);
    color: var(--link-hover);
    padding-left: 28px;
}

.toc-arrow {
    font-size: 0.9rem;
    transition: transform 0.2s ease;
}

.toc-link:hover .toc-arrow {
    transform: translateX(4px);
}

.toc-text {
    flex: 1;
}

/* ============================================
   Content Section
   ============================================ */
.content-section {
    margin-top: 40px;
}

.content-body {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-color);
}

.content-body h1,
.content-body h2,
.content-body h3,
.content-body h4,
.content-body h5,
.content-body h6 {
    font-family: var(--font-heading);
    color: var(--text-color);
    margin-top: 2em;
    margin-bottom: 0.8em;
    line-height: 1.3;
}

.content-body h1 {
    font-size: 2.2rem;
    font-weight: 700;
}

.content-body h2 {
    font-size: 1.8rem;
    font-weight: 600;
}

.content-body h3 {
    font-size: 1.4rem;
    font-weight: 600;
}

.content-body h4 {
    font-size: 1.2rem;
    font-weight: 600;
}

.content-body p {
    margin: 1.2em 0;
}

.content-body a {
    color: var(--link-color);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color 0.2s ease;
}

.content-body a:hover {
    color: var(--link-hover);
}

.content-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 2em 0;
    box-shadow: 0 4px 12px var(--shadow);
}

.content-body blockquote {
    margin: 2em 0;
    padding: 1.5em 2em;
    border-left: 4px solid var(--accent-color);
    background: var(--border-color);
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: var(--text-secondary);
}

.content-body blockquote p {
    margin: 0.5em 0;
}

.content-body ul,
.content-body ol {
    margin: 1.2em 0;
    padding-left: 2em;
}

.content-body li {
    margin: 0.5em 0;
}

.content-body code {
    background: var(--border-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.content-body pre {
    background: var(--border-color);
    padding: 1.5em;
    border-radius: 8px;
    overflow-x: auto;
    margin: 2em 0;
}

.content-body pre code {
    background: none;
    padding: 0;
}

/* ============================================
   Custom Content Elements
   ============================================ */

/* Styled Quote */
.styled-quote {
    margin: 2.5em 0;
    padding: 2em;
    text-align: center;
    background: var(--border-color);
    border-radius: 12px;
    border: none;
    font-style: italic;
}

.styled-quote p {
    font-size: 1.3rem;
    line-height: 1.6;
    margin: 0 0 1em 0;
    color: var(--text-color);
}

.styled-quote cite {
    display: block;
    font-size: 1rem;
    color: var(--text-secondary);
    font-style: normal;
}

/* YouTube Embed */
.youtube-embed {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    margin: 2em 0;
    border-radius: 12px;
    box-shadow: 0 4px 16px var(--shadow);
}

.youtube-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 12px;
}

/* Video Container */
.video-container {
    margin: 2em 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px var(--shadow);
}

.video-container video {
    width: 100%;
    height: auto;
    display: block;
}

/* Slideshow */
.slideshow {
    position: relative;
    width: 100%;
    margin: 2em 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px var(--shadow);
}

.slideshow img {
    width: 100%;
    height: auto;
    display: none;
    margin: 0;
    box-shadow: none;
}

.slideshow img.active {
    display: block;
}

/* Short Video (Vertical) */
.short-video {
    max-width: 400px;
    margin: 2em auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px var(--shadow);
}

.short-video video {
    width: 100%;
    height: auto;
    display: block;
}

/* Gallery */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin: 2em 0;
}

.gallery img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    margin: 0;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.2s ease;
}

.gallery img:hover {
    transform: scale(1.02);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    html {
        font-size: 16px;
    }
    
    .content-body h1 {
        font-size: 1.8rem;
    }
    
    .content-body h2 {
        font-size: 1.5rem;
    }
    
    .content-body h3 {
        font-size: 1.3rem;
    }
    
    .gallery {
        grid-template-columns: 1fr;
    }
    
    .short-video {
        max-width: 100%;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .theme-controls {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .back-link {
        display: none;
    }
}