:root {
  --primary-color: #333333;
  --secondary-color: #555555;
  --accent-color: #0066cc;
  --background-color: #ffffff;
  --text-color: #333333;
  --border-color: #cccccc;
  
  --font-family: Roboto, 'Arial', sans-serif;
  --font-size-base: 16px;
  --font-size-large: 24px;
  --font-size-small: 14px;
  
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  --about-projects-content-max-width: 680px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Roboto, Arial;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-body-stack {
  flex: 1 0 auto;
}

.site-footer {
  flex-shrink: 0;
  background-color: var(--primary-color);
  color: rgba(255, 255, 255, 0.88);
  padding: var(--spacing-xl) var(--spacing-md);
  font-size: var(--font-size-small);
}

.site-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: var(--spacing-lg);
}

.site-footer-name {
  font-size: var(--font-size-large);
  font-weight: 700;
  color: var(--background-color);
  margin: 0 0 var(--spacing-xs);
}

.site-footer-tagline {
  margin: 0;
  opacity: 0.85;
  line-height: 1.5;
  max-width: 28em;
}

.site-footer-columns {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

.site-footer-vrule {
  width: 1px;
  flex-shrink: 0;
  background-color: rgba(255, 255, 255, 0.28);
  align-self: stretch;
  min-height: 5.5em;
}

.site-footer-nav ul,
.site-footer-external ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.site-footer-nav a,
.site-footer-external a {
  color: var(--background-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.site-footer-nav a:hover,
.site-footer-external a:hover {
  color: var(--accent-color);
}

.site-footer-copy {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  opacity: 0.75;
  font-size: 13px;
}

@media (max-width: 480px) {
  .site-footer-columns {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .site-footer-vrule {
    width: 100%;
    height: 1px;
    min-height: 0;
    order: 1;
  }

  .site-footer-nav {
    order: 0;
  }

  .site-footer-external {
    order: 2;
  }
}

header {
  background-color: var(--primary-color);
  padding: var(--spacing-md);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  color: var(--background-color);
  font-size: var(--font-size-large);
  font-weight: bold;
}

.logo a {
  color: inherit;
  text-decoration: none;
}

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

.nav-links a {
  color: var(--background-color);
  text-decoration: none;
  transition: color 0.3s ease;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.nav-links a:hover {
  color: var(--accent-color);
}

.hero {
  background-color: var(--background-color);
  color: var(--text-color);
  padding: 72px var(--spacing-xl);
  text-align: left;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: left;
  gap: var(--spacing-lg);
  max-width: 1200px;
  margin: 56px auto 0 auto;
}

.hero-image {
  width: 300px;
  height: 400px;
  max-width: 100%;
  object-fit: cover;
  border-radius: 10px;
  flex-shrink: 0;
}

.hero-content {
  flex: 1;
  margin-top: 0;
  max-width: 52ch;
}

.hero-content h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.hero-content p {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
}
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    padding: 20px;
  }

  .hero-image img {
    width: 130%;
    max-width: 380px;
  }
}

.cta-button {
  display: inline-block;
  background-color: var(--accent-color);
  color: var(--background-color);
  padding: var(--spacing-sm) var(--spacing-lg);
  text-decoration: none;
  border-radius: 5px;
  font-weight: 600;
  transition: background-color 0.3s ease;
  margin-right: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.cta-button:hover {
  background-color: #0052a3;
}

.cta-button:nth-of-type(2) {
  background-color: #dc3545;
}

.cta-button:nth-of-type(2):hover {
  background-color: #c82333;
}

.about {
  background-color: var(--background-color);
  color: var(--text-color);
  padding: 80px var(--spacing-xl);
}

.about-container {
  max-width: var(--about-projects-content-max-width);
  margin: 0 auto;
}

.about h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--primary-color);
}

.about h2 {
  font-size: 28px;
  font-weight: 600;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.about p {
  font-size: var(--font-size-base);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.about ul {
  list-style-position: inside;
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.about li {
  font-size: var(--font-size-base);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.about-skills-layout {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.about-skills-layout > ul {
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
}

.about-skills-photo {
  display: block;
  width: auto;
  max-width: min(300px, 50%);
  height: auto;
  max-height: 400px;
  object-fit: cover;
  border-radius: 10px;
  flex-shrink: 0;
}

.projects {
  background-color: var(--background-color);
  color: var(--text-color);
  padding: 80px var(--spacing-xl);
}

.projects-container {
  max-width: var(--about-projects-content-max-width);
  margin: 0 auto;
}

/* About/Projects layout with right-side table of contents */
.page-with-toc {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xl);
}

.page-with-toc-main {
  flex: 1;
  min-width: 0;
}

.page-toc {
  width: 220px;
  flex-shrink: 0;
  box-sizing: border-box;
  position: sticky;
  top: var(--spacing-md);
  height: 420px;
  text-align: left;
  overflow: auto;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: #fafafa;
  font-size: var(--font-size-small);
  color: var(--secondary-color);
}

/* Prevent About page list styles from affecting TOC */
.page-toc li {
  font-size: var(--font-size-small);
  line-height: 1.4;
  margin-bottom: 0;
}

.page-toc-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--primary-color);
  margin: 0 0 var(--spacing-sm);
}

.page-toc-list,
.page-toc-list ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-toc-list ul {
  margin-top: var(--spacing-xs);
  margin-left: var(--spacing-md);
  border-left: 2px solid var(--border-color);
  padding-left: var(--spacing-sm);
}

.page-toc-list > li {
  margin-bottom: var(--spacing-sm);
}

.page-toc-list li li {
  margin-bottom: var(--spacing-xs);
}

.page-toc-list a {
  color: var(--secondary-color);
  text-decoration: none;
  line-height: 1.4;
}

.page-toc-list a:hover {
  color: var(--accent-color);
}

.about h1[id],
.about h2[id],
.projects h1[id],
.projects h2[id] {
  scroll-margin-top: var(--spacing-xl);
}

@media (max-width: 900px) {
  .page-with-toc {
    padding: 0 var(--spacing-md);
  }

  .page-toc {
    display: none;
  }
}

.projects h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--primary-color);
}

.projects h2 {
  font-size: 28px;
  font-weight: 600;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.projects p {
  font-size: var(--font-size-base);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.projects-minesweeper-container {
  width: 100%;
  margin: var(--spacing-lg) 0 var(--spacing-xl);
  border-radius: 10px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  background-color: var(--background-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.projects-minesweeper-iframe {
  display: block;
  width: 100%;
  height: clamp(480px, 62vh, 560px);
  border: 0;
}

.project-figure {
  margin: 0 0 var(--spacing-md) 0;
}

.project-figure .project-image {
  margin-bottom: 0;
}

.project-image {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 10px;
}

.projects figcaption {
  font-size: var(--font-size-small);
  color: var(--secondary-color);
  line-height: 1.5;
  margin-top: var(--spacing-sm);
}

/* Safari-specific mobile fixes */
@supports (-webkit-touch-callout: none) {
  .nav-links a {
    position: relative;
    z-index: 1;
  }
  
  .navbar {
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    gap: var(--spacing-md);
  }

  .hero {
    flex-direction: column;
    padding: 40px var(--spacing-md);
    min-height: auto;
    max-width: 100%;
  }

  .hero-image {
    width: 340px;
    height: 400px;
    max-width: 100%;
    order: -1;
  }

  .hero-content {
    margin-top: 0;
    width: 100%;
  }

  .hero-content h1 {
    font-size: 36px;
  }

  .hero-content p {
    font-size: var(--font-size-base);
  }

  .about {
    padding: 50px var(--spacing-md);
  }

  .about h1 {
    font-size: 32px;
  }

  .about h2 {
    font-size: 22px;
  }

  .about-skills-layout {
    gap: var(--spacing-md);
  }

  .about-skills-photo {
    max-width: min(280px, 48%);
    max-height: 360px;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 18px;
  }

  .nav-links {
    gap: var(--spacing-sm);
    font-size: 12px;
  }

  .hero {
    padding: 20px var(--spacing-sm);
  }

  .hero-image {
    width: 100%;
    height: 300px;
    max-width: 320px;
    margin: 0 auto;
    display: block;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-content p {
    font-size: 14px;
  }

  .cta-button {
    padding: 8px 16px;
    font-size: 14px;
    margin-right: 0;
  }

  .about {
    padding: 30px var(--spacing-sm);
  }

  .page-with-toc {
    padding: 0 var(--spacing-sm);
  }

  .about h1 {
    font-size: 24px;
  }

  .about h2 {
    font-size: 18px;
  }

  .about-skills-layout {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
  }

  .about-skills-layout > ul {
    width: 100%;
    align-self: stretch;
  }

  .about-skills-photo {
    max-width: 100%;
    max-height: 340px;
    object-fit: cover;
  }
}