/* Modern Academic Minimalist Layout - Mobile First */

:root {
  --color-primary: #1a5276;
  --color-primary-dark: #0f3460;
  --color-heading: #1a5276;
  --color-accent: #16a085;
  --color-text: #2c3e50;
  --color-text-light: #555555;
  --color-bg: #ffffff;
  --color-bg-light: #f8f9fa;
  --color-bg-dark: #f0f2f5;
  --color-border: #e8eaed;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --max-width: 1200px;
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
  --font-family-heading: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  height: 100%;
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

body {
  font-family: var(--font-family-base);
  color: var(--color-text);
  background: var(--color-bg-dark);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Main layout container */
.page-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 100%;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  z-index: 1000;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-primary-dark);
  color: #ffffff;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

h1 {
  font-size: 2rem;
  font-weight: bold;
}

.figure-label {
  font-family: var(--font-family-heading);
  font-weight: bold;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 1.5rem;
  font-weight: bold;
}

h3 {
  font-size: 1.25rem;
  font-weight: bold;
}

p {
  margin-bottom: var(--spacing-sm);
  text-align: justify;
  line-height: 1.7;
}

a, a:visited {
  color: var(--color-accent);
  text-decoration: none;
  background-color: transparent;
  outline: none;
  transition: var(--transition);
  font-weight: 500;
}

a:hover {
  color: var(--color-heading);
  text-decoration: underline;
  background-color: transparent;
}

/* Header */
header {
  background: var(--color-primary);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  border-bottom: 1px solid var(--color-primary-dark);
  box-shadow: 0 2px 4px var(--color-shadow);
}

header .site-name {
  color: #ffffff;
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.5px;
  margin-bottom: var(--spacing-xs);
}

header p {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  font-weight: 500;
  text-align: center;
  letter-spacing: 0.3px;
}

/* Navigation */
nav {
  background: var(--color-bg);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 3px var(--color-shadow);
}

nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  max-width: var(--max-width);
  margin: 0 auto;
}

nav li {
  margin: 0;
  flex: 1 1 auto;
  min-width: 70px;
}

nav a {
  display: block;
  padding: 1rem var(--spacing-sm);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  text-align: center;
  color: var(--color-text);
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-bottom-color 0.2s ease;
  position: relative;
}

nav a:hover {
  background-color: var(--color-bg-light);
  border-bottom-color: var(--color-accent);
  color: var(--color-heading);
  text-decoration: none;
}

/* Main content area */
.site-content {
  flex: 1;
  background: var(--color-bg);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: var(--spacing-lg);
  margin-bottom: 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px var(--color-shadow);
}

/* Hero image */
.hero-image {
  width: 100%;
  grid-column: 1;
  display: none;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* Sidebar */
aside {
  background: var(--color-bg-light);
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  order: 2;
}

aside h2 {
  font-size: 1.1rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-heading);
  font-weight: 600;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: var(--spacing-sm);
}

aside h2:first-child {
  margin-top: 0;
}

aside h3 {
  font-size: 0.95rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
  font-weight: 600;
}

aside p {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
  text-align: left;
  line-height: 1.7;
  color: var(--color-text-light);
}

aside a {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

aside a:hover {
  color: var(--color-heading);
  background: transparent;
  text-decoration: underline;
}

/* Main content */
main {
  padding: var(--spacing-lg);
  order: 1;
  flex: 1;
}

main article {
  max-width: 100%;
}

main article > h1 {
  color: var(--color-heading);
  border-bottom: 3px solid var(--color-accent);
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

main article > h2 {
  color: var(--color-heading);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

main article img.wrapright {
  float: right;
  margin: 0 0 var(--spacing-lg) var(--spacing-lg);
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  box-shadow: 0 2px 8px var(--color-shadow);
}

/* Lists */
ul, ol {
  margin: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
  line-height: 1.6;
}

ol li {
  margin-bottom: var(--spacing-md);
}

/* Footer */
footer {
  background: var(--color-primary);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  border-top: 1px solid var(--color-primary-dark);
  margin-top: auto;
  font-size: 0.9rem;
}

footer a {
  text-decoration: none;
  margin: 0 var(--spacing-sm);
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  transition: var(--transition);
}

footer a:hover {
  color: #ffffff;
  text-decoration: underline;
}

footer p {
  text-align: center;
  margin-bottom: var(--spacing-xs);
  color: rgba(255, 255, 255, 0.95);
}

/* Content containers */
.content-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

/* Research Highlights page */
.hero-highlight {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.hero-highlight img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 2px 6px var(--color-shadow);
}

.hero-highlight figcaption {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-top: var(--spacing-xs);
}

@media (min-width: 900px) {
  .hero-highlight {
    grid-template-columns: 1.2fr 1fr;
  }
}

.highlight-map {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0 var(--spacing-xl);
  list-style: none;
  padding: 0;
}

.theme-card {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-md);
  background: var(--color-bg-light);
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

.theme-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px var(--color-shadow);
}

.theme-card h3 {
  color: var(--color-heading);
  margin-bottom: var(--spacing-xs);
  font-size: 1.05rem;
}

.theme-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.featured-grid,
.section-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.highlight-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-lg);
  background: var(--color-bg-light);
  box-shadow: 0 1px 3px var(--color-shadow);
}

.highlight-card img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  margin-bottom: var(--spacing-sm);
}

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

.paper-meta {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

.highlight-takeaway {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.paper-links {
  margin-top: var(--spacing-sm);
  font-size: 0.9rem;
}

.paper-links a {
  margin-right: var(--spacing-sm);
}

.content-box {
  background: var(--color-bg-light);
  padding: var(--spacing-lg);
  border-radius: 8px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  box-shadow: 0 1px 3px var(--color-shadow);
}

.content-box:hover {
  box-shadow: 0 4px 12px var(--color-shadow);
  border-color: var(--color-accent);
}

.content-box img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin-bottom: var(--spacing-md);
  box-shadow: 0 2px 6px var(--color-shadow);
}

/* People / person card styling */
.people-group {
  margin-bottom: var(--spacing-xl);
}

.person {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.person:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.person-photo {
  flex: 0 0 auto;
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 6px;
  box-shadow: 0 2px 8px var(--color-shadow);
}

.person-info {
  flex: 1 1 auto;
  min-width: 0;
}

.person-info h3 {
  margin: 0 0 0.4rem 0;
  color: var(--color-text);
}

.person-info p {
  margin-bottom: 0.4rem;
  text-align: left;
  line-height: 1.6;
}

.person-info p:last-child {
  margin-bottom: 0;
}

.person-email {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

@media (max-width: 480px) {
  .person {
    flex-direction: column;
    align-items: flex-start;
  }

  .person-photo {
    width: 80px;
    height: 80px;
  }
}

/* Publication list styling */
.publication-list {
  list-style: decimal;
  margin-left: var(--spacing-lg);
}

.publication-list li {
  margin-bottom: var(--spacing-xl);
  text-align: left;
  padding: var(--spacing-md);
  padding-left: var(--spacing-lg);
  background: var(--color-bg-light);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
  transition: var(--transition);
  line-height: 1.8;
}

.publication-list li:hover {
  background: var(--color-bg);
  box-shadow: 0 2px 6px var(--color-shadow);
  border-left-color: var(--color-primary);
}

.publication-list a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.publication-list a:hover {
  color: var(--color-heading);
  text-decoration: underline;
}

/* Table styling */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px var(--color-shadow);
}

thead {
  background: var(--color-primary);
}

th, td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: 600;
  background: var(--color-primary);
  color: #ffffff;
}

tbody tr {
  transition: var(--transition);
}

tbody tr:hover {
  background: var(--color-bg-light);
  box-shadow: inset 0 0 0 1px var(--color-border);
}

/* Print styles */
@media print {
  nav {
    display: none;
  }

  aside {
    display: none;
  }

  .site-content {
    margin: 0;
    border-radius: 0;
  }
}

/* Tablet and larger screens */
@media (min-width: 768px) {
  :root {
    font-size: 16px;
  }

  nav ul {
    gap: 0;
    padding: 0 var(--spacing-lg);
  }

  nav li {
    flex: 0 1 auto;
  }

  nav a {
    font-size: 0.95rem;
    padding: 1.1rem var(--spacing-md);
  }

  .site-content {
    grid-template-columns: 1fr 320px;
    gap: 0;
    margin: var(--spacing-xl) var(--spacing-xl) 0 var(--spacing-xl);
  }

  aside {
    border-top: 0;
    border-left: 1px solid var(--color-border);
    order: 2;
  }

  main {
    order: 1;
  }

  .hero-image {
    display: block;
    grid-column: 1 / -1;
    margin-bottom: 0;
  }

  main article img.wrapright {
    max-width: 45%;
  }
}

/* Large screens */
@media (min-width: 1024px) {
  .site-content {
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
  }

  aside {
    max-width: 350px;
  }

  .content-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Dark mode support (if needed) */
@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #e8eaed;
    --color-text-light: #b0b3b8;
    --color-bg: #202124;
    --color-bg-light: #292a2d;
    --color-bg-dark: #3c4043;
    --color-border: #5a5c5f;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-accent: #4fd1b3;
    --color-heading: #6fb1e0;
  }

  /* Flat dark background instead of the light-mode texture image */
  body {
    background: #1f1f23;
  }

  /* Brighter accent for in-article headings, since --color-heading's
     blue is tuned for readability rather than emphasis */
  main article > h1, main article > h2 {
    color: var(--color-accent);
  }

  a:hover {
    color: #4db8a0;
  }

  /* --color-primary-dark stays a dark navy in both themes, so the
     footer's light-mode border (var(--color-primary-dark)) would be
     invisible against the dark-mode footer background */
  footer {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }
}