/* CSS Variables for theming */
:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --text-muted: #666666;
  --link-color: #0066cc;
  --link-hover: #004499;
  --border-color: #e0e0e0;
  --card-bg: #f8f9fa;
  --header-bg: #ffffff;
  --scrollspy-bg: transparent;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --max-width: 900px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: "SF Mono", "Monaco", "Consolas", monospace;
}

[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --text-color: #e0e0e0;
  --text-muted: #999999;
  --link-color: #66b3ff;
  --link-hover: #99ccff;
  --border-color: #333333;
  --card-bg: #242424;
  --header-bg: #1a1a1a;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: background-color 0.2s, color 0.2s;
}

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

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

img {
  max-width: 100%;
  height: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-color);
}

.site-logo:hover {
  color: var(--link-color);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

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

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  font-size: 1.25rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
}

.theme-toggle:hover {
  color: var(--text-color);
}

.icon-moon {
  display: none;
}

[data-theme="dark"] .icon-sun {
  display: none;
}

[data-theme="dark"] .icon-moon {
  display: inline;
}

/* Page Container */
.page-container {
  display: flex;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  gap: 3rem;
}

/* Main Content */
.main-content {
  flex: 1;
  max-width: var(--max-width);
  min-width: 0;
}

.main-content.with-scrollspy {
  margin-left: auto;
}

/* Scrollspy Navigation */
.scrollspy {
  position: sticky;
  top: 6rem;
  width: 160px;
  flex-shrink: 0;
  height: fit-content;
  display: none;
}

@media (min-width: 1024px) {
  .scrollspy {
    display: block;
  }
}

.scrollspy ul {
  list-style: none;
  border-left: 1px solid var(--border-color);
  padding-left: 0;
}

.scrollspy li {
  margin: 0;
}

.scrollspy-link {
  display: block;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: all 0.2s;
}

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

.scrollspy-link.active {
  color: var(--link-color);
  border-left-color: var(--link-color);
}

/* About Section */
.about-hero {
  display: flex;
  gap: 2rem;
  margin-bottom: 3rem;
  align-items: flex-start;
}

.profile-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.profile-image {
  width: 160px;
  height: 160px;
  border-radius: 8px;
  object-fit: cover;
  margin-bottom: 1rem;
}

.social-icons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.bio-link {
  font-size: 0.85rem;
  color: var(--link-color);
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--link-color);
  border-radius: 4px;
  transition: all 0.2s;
  text-align: center;
}

.bio-link:hover {
  background: var(--link-color);
  color: var(--bg-color);
}

.social-icons-row {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.social-icon {
  width: 24px;
  height: 24px;
  color: var(--text-muted);
  transition: color 0.2s, transform 0.2s;
}

.social-icons-row a:hover .social-icon {
  color: var(--link-color);
  transform: translateY(-2px);
}

.about-intro h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.about-intro .tagline {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.about-intro p {
  margin-bottom: 1rem;
}

.job-history {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.job-history-integrated {
  margin-top: 1.5rem;
}

.job-history h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.timeline {
  list-style: none;
}

.timeline li {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-color);
}

.timeline .year {
  color: var(--text-muted);
  font-weight: 500;
  margin-right: 0.5rem;
}

.github-contributions {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.github-contributions h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.contribution-chart {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  transition: transform 0.2s;
}

.github-contributions a:hover .contribution-chart {
  transform: scale(1.02);
}

/* Sections */
section {
  margin-bottom: 4rem;
  scroll-margin-top: 5rem;
}

section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

/* Podcast Section */
.podcast-featured {
  margin-bottom: 1.5rem;
}

.featured-card {
  display: block;
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  max-width: 600px;
}

.featured-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.featured-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

.featured-content {
  padding: 0.75rem;
}

.featured-content h3 {
  font-size: 0.95rem;
  font-weight: 500;
  margin-top: 0.25rem;
}

.podcast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.podcast-card {
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.podcast-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.podcast-thumbnail {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  aspect-ratio: 16 / 9;
}

.podcast-content {
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.podcast-content h3 {
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.3;
  margin: 0;
  color: var(--text-color);
}

.podcast-tag {
  font-size: 0.7rem;
  padding: 0.3rem 0.6rem;
  background: var(--border-color);
  border-radius: 4px;
  color: var(--text-muted);
  display: inline-block;
  width: fit-content;
}

/* Content Lists */
.content-list {
  list-style: none;
}

.content-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

.content-list li:last-child {
  border-bottom: none;
}

.content-list a {
  display: block;
}

.content-list h3 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.content-list p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
}

.content-list .meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Article Cards */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.article-card {
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.article-image {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.article-content {
  padding: 1rem;
  flex: 1;
}

.article-content h3 {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  line-height: 1.3;
}

.article-content p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Project Cards */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 1.25rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.project-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.project-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-card .tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  background: var(--border-color);
  border-radius: 4px;
  color: var(--text-muted);
}

/* Videos Section */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.video-card {
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.video-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.video-thumbnail {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.video-content {
  padding: 1rem;
}

.video-content h3 {
  font-size: 1.1rem;
  font-weight: 500;
}

/* Photos Section */
.section-description {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.photo-filters {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.4rem 1rem;
  border: 1px solid var(--border-color);
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: all 0.2s;
}

.filter-btn:hover {
  border-color: var(--link-color);
  color: var(--link-color);
}

.filter-btn.active {
  background: var(--link-color);
  border-color: var(--link-color);
  color: white;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .photo-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .photo-grid {
    grid-template-columns: 1fr;
  }
}

.photo-item {
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.3s;
  cursor: pointer;
}

.photo-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.photo-item.hidden {
  display: none;
}

.photo-image {
  width: 100%;
  height: 350px;
  object-fit: cover;
}

.photo-caption {
  padding: 0.75rem 1rem;
}

.photo-caption p {
  font-size: 0.85rem;
  line-height: 1.4;
  margin-bottom: 0.4rem;
  color: var(--text-color);
}

.photo-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--link-color);
  padding: 0.15rem 0.5rem;
  background: var(--border-color);
  border-radius: 3px;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.lightbox.active {
  display: flex;
}

.lightbox-image {
  max-width: 90%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 4px;
}

.lightbox-caption {
  color: white;
  margin-top: 1rem;
  font-size: 0.9rem;
  text-align: center;
  max-width: 600px;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 1rem;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  opacity: 1;
}

.lightbox-close {
  top: 1rem;
  right: 1rem;
  font-size: 2.5rem;
}

.lightbox-prev {
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 3rem;
}

.lightbox-next {
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 3rem;
}

/* See All Button */
.see-all-btn {
  display: block;
  margin: 1.5rem auto 0;
  padding: 0.6rem 1.5rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
}

.see-all-btn:hover {
  border-color: var(--link-color);
  color: var(--link-color);
}

.see-all-btn.expanded {
  display: none;
}

.podcast-extra,
.article-extra {
  display: none;
}

.podcast-extra.visible,
.article-extra.visible {
  display: flex;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .about-hero {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .profile-section {
    align-items: center;
  }

  .page-container {
    padding: 1rem;
  }

  .podcast-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
}