/* ==================== */
/* CSS Variables */
/* ==================== */
:root {
    --color-bg: #1c1c1c;
    --color-bg-elevated: #222222;
    --color-bg-overlay: #333333;
    --color-text: #ebdbb2;
    --color-text-muted: #666666;
    --color-accent: #6b705c;
    --color-accent-bright: #a5a58d;
    --color-border: #666666;
    --color-highlight: #b7b7a4;
    
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    --font-serif: Georgia, serif;
    
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-xxl: 4rem;
    
    --max-width: 1200px;
    --max-width-text: 720px;

    --navbar-height: 6vh;
}

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

html {
    position: relative;
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-mono);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    position: relative;
    overflow-x: hidden;
}

a {
    color: var(--color-text-muted);
}
a:hover {
    color: var(--color-text);
}

h2, h3, h4, h5, h6 {
  margin-top: 1.5em;
}

ul, ol {
  margin: 1.5em 0;
  padding-left: 2em;
  line-height: 1.8;
}

ul li, ol li {
  margin-bottom: 0.8em;
}

ul {
  list-style-type: none;
}

ul li::before {
  color: var(--color-text-muted);
  font-weight: bold;
  display: inline-block;
  width: 1em;
  margin-left: -1em;
}


/* ==================== */
/* Container */
/* ==================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    position: relative;
    z-index: 1;
}

/* ==================== */
/* Header */
/* ==================== */
.site-header {
    height: var(--navbar-height);
    border-bottom: 1px solid var(--color-border);
    background: rgba(34, 34, 34, 0.75);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
}

.site-header .container {
    width: 100%;
}

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

.site-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Mobile menu toggle button */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 101;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Navigation */
.main-nav ul {
    list-style: none;
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.main-nav li {
    margin-bottom: 0;
}

.main-nav a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
    position: relative;
    align-items: center;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.2s;
}

.main-nav a:hover {
    color: var(--color-text);
}

.main-nav a:hover::after {
    width: 100%;
}

/* ==================== */
/* Hero Section */
/* ==================== */
.hero {
    display: flex;
    flex-direction: column;
    padding: var(--space-xxl) 0;
    position: relative;
    min-height: calc(100vh - var(--navbar-height));
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, var(--color-text), var(--color-accent-bright));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 2s ease-out 0.2s both;
}

.hero-bg {
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
    padding-left: calc(50vw - 50%);
    padding-right: calc(50vw - 50%);
    background:
        linear-gradient(to bottom, transparent 80%, var(--color-bg)),
        url(../images/contours.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==================== */
/* Projects Section */
/* ==================== */
.projects {
    padding: var(--space-xxl) 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: var(--space-xl);
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background: var(--color-accent);
    margin: var(--space-sm) auto 0;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.project-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: var(--space-lg);
    border-radius: 8px;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: 0 8px 24px rgba(91, 155, 213, 0.1);
}

.project-meta {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    flex-wrap: wrap;
}

.project-meta time {
    font-family: var(--font-mono);
}

.category {
    padding: 2px 8px;
    background: var(--color-bg-overlay);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--color-accent);
}

.project-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.project-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.2s;
}

.project-title a:hover {
    color: var(--color-accent-bright);
}

.project-summary {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tag {
    font-size: 0.8rem;
    padding: 4px 10px;
    background: var(--color-bg-overlay);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: all 0.2s;
}

.tag:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ==================== */
/* Article Page */
/* ==================== */
.article {
    max-width: var(--max-width-text);
    margin: var(--space-xxl) auto;
    padding: 0 var(--space-md);
}

.article-header {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.article-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.article-meta {
    display: flex;
    gap: var(--space-md);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
}

.article-content {
    font-size: 1.125rem;
    line-height: 1.8;
}

.article-content h2 {
    font-size: 1.75rem;
    margin: var(--space-xl) 0 var(--space-md);
    color: var(--color-text);
}

.article-content h3 {
    font-size: 1.5rem;
    margin: var(--space-lg) 0 var(--space-sm);
    color: var(--color-text);
}

.article-content p {
    margin-bottom: var(--space-md);
}

.article-content a {
    color: var(--color-accent-bright);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.article-content a:hover {
    border-bottom-color: var(--color-accent-bright);
}

.article-content code {
    font-family: var(--font-mono);
    background: var(--color-bg-elevated);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.9em;
}

.article-content pre {
    background: var(--color-bg-elevated);
    padding: var(--space-md);
    border-radius: 6px;
    overflow-x: auto;
    margin: var(--space-md) 0;
    border: 1px solid var(--color-border);
}

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

.article-content ul,
.article-content ol {
    margin: var(--space-md) 0;
    padding-left: var(--space-lg);
}

.article-content li {
    margin-bottom: var(--space-xs);
}

.article-content blockquote {
    border-left: 4px solid var(--color-accent);
    padding-left: var(--space-md);
    margin: var(--space-lg) 0;
    color: var(--color-text-muted);
    font-style: italic;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin: var(--space-lg) 0;
}

.article-footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.article-navigation {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin: var(--space-xxl) auto;
    max-width: var(--max-width-text);
    padding: 0 var(--space-md);
}

.nav-link {
    display: block;
    padding: var(--space-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s;
}

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

.nav-link .label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.nav-link .title {
    display: block;
    color: var(--color-text);
    font-weight: 500;
}

.nav-link.next {
    text-align: right;
}

/* ==================== */
/* Page */
/* ==================== */
.page {
    max-width: var(--max-width-text);
    margin: var(--space-xxl) auto;
    padding: 0 var(--space-md);
}

.page-header {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.page-title {
    font-size: clamp(2rem, 4vw, 3rem);
}

.page-content {
    font-size: 1.125rem;
    line-height: 1.8;
}

/* Apply article-content styles to page-content */
.page-content h2,
.page-content h3,
.page-content p,
.page-content a,
.page-content code,
.page-content pre,
.page-content ul,
.page-content ol,
.page-content li,
.page-content blockquote,
.page-content img {
    /* Inherits styles from .article-content */
}

/* ==================== */
/* Archives */
/* ==================== */
.archives {
    padding: var(--space-xxl) 0;
}

.archives-header {
    text-align: center;
    margin-bottom: var(--space-xxl);
}

.archives-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
}

.archives-subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.archives-list {
    max-width: var(--max-width-text);
    margin: 0 auto;
}

.archive-year {
    margin-bottom: var(--space-xxl);
}

.year-label {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
    font-family: var(--font-mono);
    position: relative;
    display: inline-block;
}

.year-label::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    opacity: 0.3;
}

.year-articles {
    list-style: none;
}

.archive-item {
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.archive-item:last-child {
    border-bottom: none;
}

.archive-item time {
    font-family: var(--font-mono);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    min-width: 60px;
}

.archive-item a {
    color: var(--color-text);
    text-decoration: none;
    flex: 1;
    min-width: 200px;
    transition: color 0.2s;
}

.archive-item a:hover {
    color: var(--color-accent-bright);
}

.archive-tags {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

/* ==================== */
/* Author Profile */
/* ==================== */
.author-profile {
    padding: var(--space-xxl) 0;
}

.author-header {
    text-align: center;
    margin-bottom: var(--space-xxl);
    max-width: var(--max-width-text);
    margin-left: auto;
    margin-right: auto;
}

.author-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.author-bio {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.author-projects h2 {
    font-size: 2rem;
    margin-bottom: var(--space-xl);
    text-align: center;
}

/* ==================== */
/* Pagination */
/* ==================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    margin-top: var(--space-xxl);
    padding: var(--space-lg) 0;
}

.pagination-link {
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text);
    text-decoration: none;
    transition: all 0.2s;
}

.pagination-link:hover {
    border-color: var(--color-accent);
    background: var(--color-bg-overlay);
}

.pagination-info {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ==================== */
/* Footer */
/* ==================== */
.site-footer {
    margin-top: var(--space-xxl);
    padding: var(--space-xxl) 0 var(--space-lg);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-section h3 {
    font-size: 1.1rem;
    margin-bottom: var(--space-md);
    color: var(--color-accent);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-xs);
}

.footer-section a {
    color: var(--color-text-muted);
    text-decoration: underline;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: var(--color-text);
}

.footer-bio {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--color-text-muted);
    text-decoration: underline;
}

.footer-bottom a:hover {
    color: var(--color-text);
    text-decoration: underline;
}

/* ==================== */
/* 404 Error Page */
/* ==================== */
.error-404 {
    text-align: center;
    padding: var(--space-xxl) 0;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-content {
    max-width: 600px;
}

.error-code {
    font-size: 8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-bright));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-md);
    font-family: var(--font-mono);
}

.error-message {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.error-description {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    font-size: 1.1rem;
}

.button {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-accent);
    color: var(--color-bg);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.2s;
}

.button:hover {
    background: var(--color-accent-bright);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(91, 155, 213, 0.3);
}

/* ==================== */
/* Responsive Design */
/* ==================== */
@media (max-width: 768px) {
    :root {
        --space-xxl: 3rem;
        --space-xl: 2rem;
    }
    
    .site-header {
        height: auto;
        min-height: var(--navbar-height);
    }

    .site-title {
        font-size: 0.875rem;
    }
    
    .header-content {
        position: relative;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-nav {
        display: none;
        width: 100%;
        order: 3;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
        padding: var(--space-sm) 0;
    }
    
    .main-nav li {
        border-bottom: 1px solid var(--color-border);
    }
    
    .main-nav li:last-child {
        border-bottom: none;
    }
    
    .main-nav a {
        display: block;
        padding: var(--space-sm) 0;
        font-size: 1rem;
    }
    
    .main-nav a::after {
        display: none;
    }
    
    .hero {
        padding: var(--space-xl) 0;
    }
    
    .hero-coordinates {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .project-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .error-code {
        font-size: 5rem;
    }
    
    .article-navigation {
        grid-template-columns: 1fr;
    }
}

/* ==================== */
/* Print Styles */
/* ==================== */
@media print {
    .site-header,
    .main-nav,
    .hero,
    .site-footer,
    .article-navigation,
    .pagination {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .article-content a {
        color: black;
        text-decoration: underline;
    }
}