/* Base styles and variables */
:root {
    /* Colors */
    --color-black: #171717;
    --color-gray-900: #262626;
    --color-gray-800: #404040;
    --color-gray-700: #525252;
    --color-gray-600: #737373;
    --color-gray-500: #a3a3a3;
    --color-gray-400: #d4d4d4;
    --color-gray-300: #e5e5e5;
    --color-gray-200: #f5f5f5;
    --color-gray-100: #fafafa;
    --color-white: #ffffff;
    
    /* Light theme */
    --background-primary: var(--color-white);
    --background-secondary: var(--color-gray-100);
    --text-primary: var(--color-black);
    --text-secondary: var(--color-gray-700);
    --border-color: var(--color-gray-300);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;
    
    /* Transitions */
    --transition: 0.2s ease;
    
    /* Layout */
    --width-content: 42rem;
    --header-height: 4rem;
    
    /* New code background variables */
    --code-bg: rgba(0, 0, 0, 0.05);
    --code-bg-dark: rgba(255, 255, 255, 0.1);
    --table-header-bg: rgba(0, 0, 0, 0.04);
    --table-header-bg-dark: rgba(255, 255, 255, 0.08);
    --table-row-alt: rgba(0, 0, 0, 0.02);
    --table-row-alt-dark: rgba(255, 255, 255, 0.03);
}

/* Dark mode theming */
.dark-mode {
    --background-primary: var(--color-black);
    --background-secondary: var(--color-gray-900);
    --text-primary: var(--color-white);
    --text-secondary: var(--color-gray-400);
    --border-color: var(--color-gray-800);
}

/* Global styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.7;
    background-color: var(--background-primary);
    color: var(--text-primary);
    transition: background-color var(--transition), color var(--transition);
}

a {
    color: currentColor;
    text-decoration: none;
    transition: opacity var(--transition);
}

a:hover {
    opacity: 0.7;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.3;
}

h1 {
    font-size: 2rem;
    margin-bottom: var(--space-6);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: var(--space-8);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-2);
}

p {
    margin-bottom: var(--space-6);
}

/* Container */
.container {
    width: 100%;
    max-width: var(--width-content);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Custom cursor */
.cursor-dot {
    position: fixed;
    pointer-events: none;
    width: 20px;
    height: 20px;
    border: 1px solid var(--text-primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: transform 0.1s;
    z-index: 9999;
    opacity: 0.6;
    mix-blend-mode: exclusion;
    display: none; /* Initially hidden, shown via JS */
}

/* Header and Navigation */
header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--space-24);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 1.25rem;
}

nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-links {
    display: flex;
    gap: var(--space-6);
    list-style: none;
}

.nav-item {
    display: flex;
    align-items: center;
}

.nav-links a {
    position: relative;
    font-size: 0.9rem;
}

.nav-links a.active {
    font-weight: 500;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: currentColor;
}

.page-updated {
    margin-top: var(--space-8);
    margin-bottom: 0;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-secondary);
}

#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

.dark-mode .sun-icon {
    display: block;
}

.dark-mode .moon-icon {
    display: none;
}

/* Intro section */
.intro {
    margin-bottom: var(--space-24);
}

.intro-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.intro-header h1 {
    margin-bottom: 0;
}

.wave {
    display: inline-block;
    animation: wave 2.5s infinite;
    transform-origin: 70% 70%;
}

@keyframes wave {
    0% { transform: rotate(0deg); }
    10% { transform: rotate(14deg); }
    20% { transform: rotate(-8deg); }
    30% { transform: rotate(14deg); }
    40% { transform: rotate(-4deg); }
    50% { transform: rotate(10deg); }
    60% { transform: rotate(0deg); }
    100% { transform: rotate(0deg); }
}

.bio {
    margin-bottom: var(--space-8);
}

.bio p {
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    gap: var(--space-4);
}

.social-links a {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Projects section */
.projects {
    margin-bottom: var(--space-24);
}

.project-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.project h3 {
    font-weight: 500;
}

.project p {
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.project-link {
    font-size: 0.9rem;
    font-weight: 500;
}

/* Publications section */
.publications {
    margin-bottom: var(--space-24);
}

.publication-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.publication {
    display: flex;
    gap: var(--space-6);
}

.publication-year {
    font-family: var(--font-mono);
    min-width: 4rem;
    font-weight: 500;
}

.publication-details h3 {
    font-weight: 500;
}

.publication-details p {
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.publication-links {
    display: flex;
    gap: var(--space-4);
}

.publication-links a {
    font-size: 0.9rem;
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: var(--space-6) 0;
    margin-top: var(--space-24);
}

footer p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Media Queries */
@media (max-width: 768px) {
    .intro-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }
    
    .social-links {
        justify-content: flex-start;
    }
    
    .publication {
        flex-direction: column;
        gap: var(--space-2);
    }

    .publication-year {
        font-size: 0.9rem;
    }
    
    .cursor-dot {
        display: none !important;
    }
}

.profile-image {
    display: flex;
    justify-content: center;
    margin: 1.5rem 0;
}

.profile-image img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 25%;
    border: 2px solid var(--border-color);
}

/* Blog section */
.blog {
    margin-bottom: var(--space-24);
}

.blog-list {
    display: flex;
    flex-direction: column;
}

.blog-post {
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--border-color);
}

.blog-post:first-child {
    padding-top: 0;
}

.blog-post:last-child {
    border-bottom: none;
}

.blog-post-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.blog-post-content h3 {
    font-weight: 500;
    font-size: 1.4rem;
    margin-bottom: 0;
    flex: 1;
    min-width: 300px;
}

.blog-post-date {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: right;
}

@media (max-width: 768px) {
    .blog-post-content {
        flex-direction: column;
        gap: var(--space-1);
    }
    
    .blog-post-date {
        text-align: left;
    }
}

/* Blog page specific styles */
.blog-page {
    padding-top: var(--space-8);
    margin-bottom: var(--space-24);
}

.blog-header {
    margin-bottom: var(--space-12);
}

.blog-list {
    display: grid;
    gap: var(--space-8);
}

/* Blog post page styles */
.blog-post-page {
    margin-top: var(--space-8);
}

.blog-post-header {
    margin-bottom: var(--space-8);
}

.back-link {
    display: inline-block;
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--text-primary);
}

.blog-post-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: var(--space-2);
    font-family: var(--font-mono);
}

.blog-post-content {
    max-width: 820px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Markdown content styling */
.blog-post-content h1, 
.blog-post-content h2, 
.blog-post-content h3, 
.blog-post-content h4, 
.blog-post-content h5, 
.blog-post-content h6 {
    margin-top: 1.5em;
    margin-bottom: 0.8em;
}

.blog-post-content h1 {
    font-size: 2.2rem;
    font-weight: 600;
    margin-top: 0;
}

.blog-post-content h2 {
    font-size: 1.8rem;
    font-weight: 600;
    padding-bottom: 0.3em;
    border-bottom: 1px solid var(--border-color);
}

.blog-post-content h3 {
    font-size: 1.5rem;
    font-weight: 500;
}

.blog-post-content h4 {
    font-size: 1.3rem;
    font-weight: 500;
}

.blog-post-content p {
    margin-bottom: 1.2em;
}

.blog-post-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.blog-post-content a:hover {
    text-decoration: underline;
}

.blog-post-content blockquote {
    border-left: 4px solid var(--border-color);
    padding-left: var(--space-4);
    margin-left: 0;
    color: var(--text-secondary);
    font-style: italic;
}

.blog-post-content ul, 
.blog-post-content ol {
    margin-bottom: 1.2em;
    padding-left: 1.5em;
}

.blog-post-content ul li, 
.blog-post-content ol li {
    margin-bottom: 0.5em;
}

.blog-post-content code {
    font-family: var(--font-mono);
    background-color: var(--code-bg);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-size: 0.9em;
}

.blog-post-content pre {
    background-color: var(--code-bg);
    padding: var(--space-4);
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: 1.5em;
}

.blog-post-content pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

.blog-post-content img {
    max-width: 100%;
    border-radius: 4px;
    margin: 1.5em 0;
}

.blog-post-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5em;
    font-size: 0.9em;
}

.blog-post-content table th {
    background-color: var(--table-header-bg);
    font-weight: 500;
    text-align: left;
    padding: 0.7em;
}

.blog-post-content table td {
    padding: 0.7em;
    border-top: 1px solid var(--border-color);
}

.blog-post-content table tr:nth-child(even) {
    background-color: var(--table-row-alt);
}

/* Dark mode adjustments */
.dark-mode .blog-post-content code {
    background-color: var(--code-bg-dark);
}

.dark-mode .blog-post-content pre {
    background-color: var(--code-bg-dark);
}

.dark-mode .blog-post-content table th {
    background-color: var(--table-header-bg-dark);
}

.dark-mode .blog-post-content table tr:nth-child(even) {
    background-color: var(--table-row-alt-dark);
}

.error-message {
    padding: var(--space-6);
    background-color: rgba(255, 0, 0, 0.05);
    border-radius: 4px;
    border: 1px solid rgba(255, 0, 0, 0.2);
    margin: var(--space-8) 0;
}

/* Local file viewing styles */
.local-note {
    font-size: 0.8rem;
    color: #e74c3c;
    font-style: italic;
    margin-top: var(--space-2);
    font-family: var(--font-mono);
}

/* Responsive adjustments for blog layout */
@media (max-width: 900px) {
    .blog-post-content {
        padding: 0 var(--space-4);
    }
}