/* CSS Custom Properties - Dark Purple/Midnight Theme with Blue-Violet Text */
:root {
  --color-bg: #0f0a1a;
  --color-bg-alt: #1a1329;
  --color-bg-elevated: #251c38;
  --color-text: #e0f2fe;
  --color-text-muted: #bae6fd;
  --color-primary: #e0f2fe;
  --color-accent: #818cf8;
  --color-accent-light: #a5b4fc;
  --color-border: #3d2e5c;
  --color-header: #12091f;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --max-width: 900px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --header-height: 85px;
}

/* Sidebar */
.sidebar {
  position: fixed;
  left: 0;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  width: 56px;
  background-color: var(--color-bg);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: var(--spacing-lg);
  gap: var(--spacing-xs);
  z-index: 50;
  transition: width 0.2s ease;
  overflow: hidden;
}

.sidebar:hover {
  width: 160px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 16px;
  color: var(--color-text-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.sidebar-link:hover {
  color: var(--color-text);
  background-color: var(--color-bg-elevated);
  text-decoration: none;
}

.sidebar-link svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.sidebar-label {
  opacity: 0;
  transition: opacity 0.2s ease;
  font-size: 0.875rem;
}

.sidebar:hover .sidebar-label {
  opacity: 1;
}

.site-wrapper {
  margin-left: 56px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Base Styles */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: var(--spacing-sm);
}

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

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

/* Header */
.site-header {
  background-color: var(--color-header);
  color: var(--color-text);
  padding: var(--spacing-md) var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.site-branding {
  display: flex;
  flex-direction: column;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-title:hover {
  color: var(--color-accent-light);
  text-decoration: none;
}

.site-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.nav-right {
  display: none;
}

.nav-buttons {
  display: flex;
  list-style: none;
  gap: var(--spacing-sm);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

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

.nav-desktop-only {
  display: list-item;
}

.main-nav a {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  padding: var(--spacing-xs) 0;
  position: relative;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-text);
  text-decoration: none;
}

.main-nav a[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent-light);
}

/* Hamburger toggle - hidden on desktop */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.hamburger {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: background-color 0.2s ease;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.2s ease;
}

.hamburger::before {
  top: -6px;
}

.hamburger::after {
  top: 6px;
}

/* Animate to X when open */
.nav-toggle[aria-expanded="true"] .hamburger {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
  transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
  transform: rotate(-45deg) translate(4px, -4px);
}

/* Main Content */
.site-main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  width: 100%;
}

/* Footer */
.site-footer {
  background-color: var(--color-header);
  color: var(--color-text-muted);
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: center;
  margin-top: auto;
  border-top: 1px solid var(--color-border);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-content p {
  margin: 0;
  font-size: 0.875rem;
}

/* Page Header */
.page-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  margin-bottom: var(--spacing-xs);
}

.page-header .subtitle {
  color: var(--color-text-muted);
  font-size: 1.125rem;
}

/* Home Page */
.home-intro {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.home-intro h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.home-intro .tagline {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
}

.profile-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

.profile-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: all 0.2s ease;
  color: var(--color-text);
}

.profile-link:hover {
  background-color: var(--color-bg-elevated);
  color: var(--color-accent-light);
  border-color: var(--color-accent);
  text-decoration: none;
}

.profile-link svg {
  width: 20px;
  height: 20px;
}

/* Cards / Items List */
.items-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.item-card {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.item-card h3 {
  margin-bottom: var(--spacing-xs);
}

.item-card h3 a {
  color: var(--color-text);
}

.item-card h3 a:hover {
  color: var(--color-accent);
}

.item-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
}

.item-description {
  color: var(--color-text);
}

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

.tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  background-color: var(--color-bg-elevated);
  border-radius: 4px;
  color: var(--color-accent-light);
  border: 1px solid var(--color-border);
}

/* Resume Page */
.resume-content {
  background-color: var(--color-bg-alt);
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.resume-section {
  margin-bottom: var(--spacing-xl);
}

.resume-section:last-child {
  margin-bottom: 0;
}

.resume-section h2 {
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.resume-entry {
  margin-bottom: var(--spacing-md);
}

.resume-entry:last-child {
  margin-bottom: 0;
}

.resume-entry h3 {
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
}

.resume-entry .company,
.resume-entry .institution {
  font-weight: 500;
  color: var(--color-text);
}

.resume-entry .dates {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.resume-entry ul {
  margin-top: var(--spacing-xs);
  margin-left: var(--spacing-md);
}

.resume-entry li {
  margin-bottom: 0.25rem;
}

/* Blog */
.blog-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.blog-post-preview {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.blog-post-preview h2 {
  font-size: 1.375rem;
  margin-bottom: var(--spacing-xs);
}

.blog-post-preview h2 a,
.blog-post-preview h3 a {
  color: var(--color-text);
}

.blog-post-preview h2 a:hover,
.blog-post-preview h3 a:hover {
  color: var(--color-accent);
}

.blog-post-preview .post-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.blog-post-preview .excerpt {
  color: var(--color-text);
}

/* Single Blog Post */
.blog-post {
  padding: 0;
}

.blog-post-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.blog-post-header h1 {
  margin-bottom: var(--spacing-xs);
}

.blog-post-header .post-meta {
  color: var(--color-text-muted);
}

.blog-post-content {
  line-height: 1.8;
}

.blog-post-content h2 {
  margin-top: var(--spacing-lg);
}

.blog-post-content h3 {
  margin-top: var(--spacing-md);
}

.blog-post-content pre {
  background-color: var(--color-header);
  color: var(--color-text);
  padding: var(--spacing-md);
  border-radius: 8px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  margin: var(--spacing-md) 0;
  border: 1px solid var(--color-border);
}

.blog-post-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-bg-elevated);
  padding: 0.1em 0.3em;
  border-radius: 3px;
  color: var(--color-accent-light);
}

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

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

.blog-post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.blog-post-content ul,
.blog-post-content ol {
  margin-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.blog-post-content li {
  margin-bottom: 0.25rem;
}

/* Post Navigation */
.post-navigation {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  max-width: 45%;
}

.post-nav-link:hover {
  text-decoration: none;
  background-color: var(--color-bg-elevated);
  border-color: var(--color-accent);
}

.post-nav-link .nav-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

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

.post-nav-link.next {
  text-align: right;
  margin-left: auto;
}

/* QR Code Page */
.qr-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
}

.qr-container {
  text-align: center;
}

.qr-code {
  border-radius: 12px;
  width: 300px;
  height: 300px;
}

.qr-label {
  margin-top: var(--spacing-md);
  font-size: 1.25rem;
  color: var(--color-text-muted);
}

/* Responsive Design */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    top: auto;
    height: auto;
    width: 100%;
    flex-direction: row;
    justify-content: center;
    padding: var(--spacing-sm);
    border-right: none;
    border-top: 1px solid var(--color-border);
    z-index: 100;
  }

  .sidebar:hover {
    width: 100%;
  }

  .sidebar-label {
    display: none;
  }

  .sidebar-link {
    padding: var(--spacing-xs);
  }

  .site-wrapper {
    margin-left: 0;
    padding-bottom: 60px;
  }

  .header-content {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    text-align: left;
    align-items: start;
  }

  .site-branding {
    grid-column: 1;
    grid-row: 1;
  }

  .site-subtitle {
    display: none;
  }

  .nav-right {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .nav-buttons {
    display: flex;
    gap: var(--spacing-sm);
  }

  .nav-toggle {
    display: block;
  }

  .main-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .nav-desktop-only {
    display: none;
  }

  .main-nav ul {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
  }

  .main-nav ul.open {
    display: flex;
  }

  .site-main {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }

  .profile-links {
    flex-direction: column;
    align-items: center;
  }

  .post-navigation {
    flex-direction: column;
  }

  .post-nav-link {
    max-width: 100%;
  }

  .post-nav-link.next {
    text-align: left;
  }

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

/* Print Styles for Resume */
@media print {
  .sidebar,
  .site-header,
  .site-footer,
  .main-nav {
    display: none;
  }

  .site-wrapper {
    margin-left: 0;
  }

  .site-main {
    padding: 0;
    max-width: 100%;
  }

  .resume-content {
    border: none;
    padding: 0;
    box-shadow: none;
  }
}