/* styles.css — based on the stylesheet of sheelfshah.github.io (Flatly + custom overrides) */
:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --muted-color: #6c757d;
  --navbar-bg: #011222;
  --navbar-text: #ecf0f1;
  --navbar-hover: rgba(255, 255, 255, 0.1);
  --card-bg: #f8f9fa;
  --border-color: #e9ecef;
  --link-color: #2a7ae2;
  --link-hover: #1756a9;
}

/* Dark theme variables */
[data-theme="dark"] {
  --bg-color: #1a1a2e;
  --text-color: #e6e6e6;
  --muted-color: #a9b0bd;
  --navbar-bg: #0a0a1a;
  --navbar-text: #ffffff;
  --navbar-hover: rgba(255, 255, 255, 0.2);
  --card-bg: #16213e;
  --border-color: #2a2a4a;
  --link-color: #6c9bc5;
  --link-hover: #8ab6d6;
}

/* Base styles */
body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Navbar Styling */
.navbar {
  background-color: var(--navbar-bg) !important;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 0.8rem 1rem;
  transition: all 0.3s ease;
}

.navbar-brand {
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--navbar-text) !important;
  font-size: 1.3rem;
}

.navbar-dark .navbar-nav .nav-link {
  color: var(--navbar-text) !important;
  font-weight: 500;
  padding: 0.5rem 1rem;
  margin: 0 0.2rem;
  border-radius: 4px;
  transition: all 0.3s ease;
  opacity: 0.9;
}

.navbar-dark .navbar-nav .nav-link:hover {
  color: var(--navbar-text) !important;
  background-color: var(--navbar-hover);
  opacity: 1;
}

.navbar-dark .navbar-nav .nav-link.active {
  color: var(--navbar-text) !important;
  font-weight: 600;
  border-bottom: 2px solid #3498db;
  opacity: 1;
}

/* Social icons in navbar */
.navbar .nav-link[aria-label] {
  padding: 0.5rem 0.7rem;
  margin: 0 0.1rem;
  opacity: 0.85;
  transition: all 0.3s ease;
  color: var(--navbar-text) !important;
}

.navbar .nav-link[aria-label]:hover {
  opacity: 1;
  transform: translateY(-2px);
  color: var(--navbar-text) !important;
}

/* Theme toggle button */
#theme-toggle {
  cursor: pointer;
  opacity: 0.85;
  transition: all 0.3s ease;
}

#theme-toggle:hover {
  opacity: 1;
  transform: translateY(-2px);
}

/* Card styles */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

/* Links */
a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--link-hover);
  text-decoration: none;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-color);
}

/* Profile photo on the home page */
.profile-photo {
  border-radius: 6px;
}

/* More breathing room between a page title and its content */
#title-block-header {
  margin-bottom: 1.75rem !important;
}
#title-block-header .title {
  margin-bottom: 0 !important;
}

/* Publication entries */
.pub {
  margin-bottom: 1.75rem;
}
.pub-title {
  display: block;
  font-size: 1.15em;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.35rem;
}
.pub-authors {
  display: block;
  font-size: 0.9em;
  line-height: 1.5;
  margin-bottom: 0.15rem;
}
.pub-venue {
  display: block;
  font-size: 0.9em;
  font-style: italic;
  color: var(--muted-color);
}

/* Utility class for multi-column layout */
.multicol-2 {
  columns: 2;           /* number of columns */
  column-gap: 2rem;     /* spacing between columns */
}

/* Dark-mode touch-ups for Quarto pieces that Flatly colours directly */
[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3,
[data-theme="dark"] h4, [data-theme="dark"] h5, [data-theme="dark"] h6,
[data-theme="dark"] .title, [data-theme="dark"] #title-block-header .title,
[data-theme="dark"] .quarto-title h1 {
  color: var(--text-color) !important;
}
[data-theme="dark"] h2 {
  border-bottom-color: var(--border-color);
}
[data-theme="dark"] #quarto-sidebar,
[data-theme="dark"] .sidebar.toc-left,
[data-theme="dark"] .sidebar.margin-sidebar,
[data-theme="dark"] .table,
[data-theme="dark"] .table > :not(caption) > * > * {
  background-color: var(--bg-color);
  color: var(--text-color);
}
[data-theme="dark"] .table > :not(caption) > * > * {
  border-color: var(--border-color);
}
[data-theme="dark"] #TOC a,
[data-theme="dark"] .nav-footer,
[data-theme="dark"] .nav-footer a {
  color: var(--text-color);
}
[data-theme="dark"] .nav-footer {
  background-color: var(--navbar-bg);
  border-top-color: var(--border-color);
}
[data-theme="dark"] hr {
  border-color: var(--border-color);
  opacity: 1;
}
[data-theme="dark"] code:not(.sourceCode) {
  background-color: var(--card-bg);
  color: var(--text-color);
}
[data-theme="dark"] .text-muted,
[data-theme="dark"] .quarto-title-meta-heading {
  color: var(--muted-color) !important;
}

/* Responsive adjustments */
@media (max-width: 767.98px) {
  /* Stack the home-page photo and greeting columns on phones */
  .columns {
    flex-direction: column;
  }
  .columns > .column {
    width: 100% !important;
    flex-basis: auto;
  }
  .columns > .column:empty {
    display: none;
  }
  .profile-photo {
    max-width: 260px;
    margin-bottom: 1.25rem;
  }
}

@media (max-width: 991.98px) {
  .navbar-collapse {
    background-color: #2c3e50;
    padding: 1rem;
    margin-top: 0.5rem;
    border-radius: 4px;
  }

  .navbar-nav {
    margin-top: 0.5rem;
  }

  .navbar-dark .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.3);
  }
}