/* ========================================
   Ehsan's Blog - Custom Styles
   Modern, Clean, Professional Design
   ======================================== */

/* ========== COLOR PALETTE ========== */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --accent-color: #06b6d4;
    --accent-light: #67e8f9;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --code-bg: #f3f4f6;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    --gradient-accent: linear-gradient(135deg, #2563eb 0%, #14b8a6 100%);
}

/* ========== DARK MODE COLORS ========== */
body.quarto-dark {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --accent-color: #22d3ee;
    --accent-light: #67e8f9;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --border-color: #374151;
    --code-bg: #1f2937;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.7);
}

/* ========== TYPOGRAPHY ========== */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 18px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-top: 2em;
    margin-bottom: 0.8em;
}

h1 {
    font-size: 2.5rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.3em;
}

/* ========== HOMEPAGE HERO - HIDDEN ========== */
.quarto-title-banner {
    display: none !important;
}

/* ========== LISTING PAGE IMPROVEMENTS ========== */
.quarto-listing {
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: 3rem;
}

.quarto-listing-default .list,
.quarto-listing-grid .list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    padding: 0;
}

.quarto-listing-default .listing-item,
.quarto-listing-grid .listing-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0;
    margin-bottom: 0;
    transition: all 0.3s ease;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.quarto-listing-default .listing-item:hover,
.quarto-listing-grid .listing-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.listing-item-img-placeholder {
    display: none !important;
}

..listing-item img.thumbnail-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    margin: 0 !important;
}

/* Hide posts without images gracefully */
.quarto-post:not(:has(img.thumbnail-image)) .listing-image {
    display: none;
}

.listing-item .listing-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 1rem 1.5rem 0.5rem 1.5rem;
    line-height: 1.3;
}

.listing-item .listing-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.listing-item .listing-title a:hover {
    color: var(--primary-color);
}

.listing-item .listing-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0 1.5rem;
    line-height: 1.5;
}

.listing-item .listing-description {
    padding: 0 1.5rem 1rem 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    flex-grow: 1;
}

/* ========== CATEGORY BADGES ========== */
.listing-categories {
    padding: 0 1.5rem 1rem 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.quarto-category {
    background: var(--gradient-accent);
    color: white;
    padding: 0.3em 0.8em;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-decoration: none;
    transition: transform 0.2s ease;
    display: inline-block;
}

.quarto-category:hover {
    transform: scale(1.05);
    color: white;
    text-decoration: none;
}

/* ========== READING TIME ========== */
.listing-reading-time,
.article-reading-time {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
}

.listing-reading-time::before {
    content: "📖 ";
}

/* ========== CODE BLOCKS ========== */
pre.sourceCode {
    border-radius: 8px;
    padding: 1.5em;
    margin: 1.5em 0;
    background-color: var(--code-bg) !important;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
}

code {
    background-color: var(--code-bg);
    padding: 3px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
}

.code-with-filename .code-with-filename-file {
    background: var(--gradient-accent);
    color: white;
    padding: 0.7em 1.2em;
    border-radius: 8px 8px 0 0;
    font-weight: 600;
    font-size: 0.9em;
    border: none;
}

/* ========== MATH DISPLAY ========== */
.mjx-chtml {
    font-size: 1.15em !important;
}

mjx-container[display="true"] {
    margin: 1.5em 0;
    padding: 1em;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

/* ========== IMAGES ========== */
img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 2em auto;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

/* ========== NAVIGATION BAR ========== */
.navbar {
    background: #000000 !important;
    border-bottom: none;
    box-shadow: var(--shadow-md);
    padding: 0.8rem 1rem;
}

.navbar-brand {
    color: #ffffff !important;
    font-weight: 800 !important;
    font-size: 1.4rem !important;
    letter-spacing: -0.02em;
}

.navbar-dark .navbar-nav .nav-link {
    color: #ffffff !important;
    font-weight: 600;
    transition: color 0.2s ease;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: var(--accent-color) !important;
}

.navbar .bi {
    color: #ffffff !important;
    font-size: 1.2rem;
}

.navbar .bi:hover {
    color: var(--accent-color) !important;
}

/* Grothendieck-Riemann-Roch Formula */
.grr-formula {
    color: #ffffff;
    font-family: "Times New Roman", Georgia, serif;
    font-style: italic;
    font-size: 1.2rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    text-shadow: 0 0 12px rgba(6, 182, 212, 0.6);
}

.grr-formula sub {
    font-size: 0.7em;
}

@media (min-width: 992px) {
    .grr-formula {
        display: inline-block;
    }
}

.navbar>.container-fluid {
    position: relative;
}

/* ========== TABLE OF CONTENTS ========== */
#TOC {
    border-left: 3px solid var(--primary-color);
    padding-left: 1.5em;
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 1.5em;
}

#TOC ul {
    list-style: none;
    padding-left: 1em;
}

#TOC a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

#TOC a:hover {
    color: var(--primary-color);
}

/* ========== LINKS ========== */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* ========== BLOCKQUOTES ========== */
blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1.5em;
    margin: 1.5em 0;
    font-style: italic;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    padding: 1em 1em 1em 1.5em;
    border-radius: 0 8px 8px 0;
}

/* ========== TABLES ========== */
table {
    width: 100%;
    margin: 1.5em 0;
    border-collapse: collapse;
    box-shadow: var(--shadow-sm);
    border-radius: 8px;
    overflow: hidden;
}

thead {
    background: var(--gradient-accent);
    color: white;
}

th,
td {
    padding: 0.8em 1em;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

tbody tr:hover {
    background: var(--bg-secondary);
}

/* ========== FOOTER ========== */
.nav-footer {
    border-top: 1px solid var(--border-color);
    margin-top: 4em;
    padding-top: 2em;
    background: var(--bg-secondary);
}

.nav-footer a {
    color: var(--text-secondary);
    margin: 0 0.5em;
    transition: color 0.2s ease;
}

.nav-footer a:hover {
    color: var(--primary-color);
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 768px) {
    .quarto-listing-default .list {
        grid-template-columns: 1fr;
    }

    .quarto-title-banner h1.title {
        font-size: 2.5rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    body {
        font-size: 16px;
    }
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.listing-item {
    animation: fadeIn 0.5s ease-out;
}

/* ========== SHOW ALL POSTS (Override list.js pagination) ========== */
.quarto-post {
    display: flex !important;
}

.quarto-listing .list .quarto-post {
    opacity: 1 !important;
    visibility: visible !important;
}

/* ========== DISQUS COMMENTS ========== */
#disqus_thread {
    margin-top: 3em;
    padding-top: 2em;
    border-top: 2px solid var(--border-color);
}

/* ========== MISCELLANEOUS ========== */
.page-columns {
    max-width: 1200px;
    margin: 0 auto;
}

/* Wider content for blog posts */
article .page-columns {
    max-width: 1400px;
}

/* Ensure body column is wider */
.column-body {
    width: 100%;
}

.quarto-title-block {
    margin-bottom: 2em;
}

.article-metadata {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2em;
    padding-bottom: 1em;
    border-bottom: 1px solid var(--border-color);
}