/* ==========================================================================
   Main Styles: Component Architecture & Layouts
   ========================================================================== */

/* Main Layout Wrapper */
.site-container {
  width: 100%;
  max-width: var(--content-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.site-container-wide {
  width: 100%;
  max-width: var(--wide-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.main-content {
  flex: 1 0 auto;
  padding-top: 2.5rem;
  padding-bottom: 4.5rem;
  background-color: var(--bg-primary);
}

/* Header & Sticky Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--bg-header);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.015em;
}

.site-brand:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: 0.925rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: 0.35rem 0.15rem;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-link:hover {
  color: var(--text-primary);
  border-bottom-color: var(--border-muted);
  text-decoration: none;
}

.nav-link.active {
  color: var(--text-primary);
  font-weight: 600;
  border-bottom-color: var(--text-primary);
  text-decoration: none;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 0.4rem;
  color: var(--text-primary);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.mobile-nav-toggle:hover {
  background-color: var(--bg-subtle);
}

/* Card Component Grid (_layouts/cards.html) */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.card-item {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.card-item:hover {
  text-decoration: none;
  border-color: var(--border-muted);
  transform: translateY(-2px);
  box-shadow: 6px 6px 0px var(--shadow-card);
}

.card-thumbnail-wrapper {
  width: 100%;
  height: 160px;
  background-color: var(--bg-subtle);
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* thumbnail with blue shade filter */
.card-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  filter:               
    sepia(100%)                  /* warm amber/yellow shades */
    hue-rotate(180deg)           /* Rotate the yellow on the color wheel to get blue shades */
    saturate(105%)
    brightness(97%); 
}

.card-body {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  padding: 1.25rem;
}

.card-header-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.card-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.55rem;
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.card-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 0;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.card-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  flex-grow: 1;
  line-height: 1.5;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

.card-tag {
  font-size: 0.775rem;
  color: var(--text-muted);
  background-color: var(--bg-secondary);
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

/* Academic Publication List Item */
.pub-item {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

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

.pub-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.pub-authors {
  font-size: 0.925rem;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.pub-venue {
  font-size: 0.875rem;
  font-style: italic;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.pub-links {
  display: flex;
  gap: 0.75rem;
  font-size: 0.825rem;
}

.pub-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.6rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
}

.pub-pill:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-muted);
  text-decoration: none;
}

/* Profile Layout */
.profile-layout {
  display: grid;
  grid-template-columns: minmax(170px, 220px) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}

.profile-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  background-color: var(--bg-primary);
  text-align: center;
}

.profile-image {
  display: block;
  width: 80%;
  aspect-ratio: 1;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
  margin-left: auto;
  margin-right: auto;
}

.profile-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
  font-size: 0.9rem;
}

.profile-links a {
  color: var(--text-primary);
  text-decoration: underline;
  text-decoration-color:var(--text-link);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.profile-links a:hover {
  text-decoration-thickness: 3px;
}

.profile-body {
  min-width: 0;
}

/* MathJax & LaTeX Formatting */
.arithmatex {
  display: inline-block;
  padding: 0 0.15em;
}

.arithmatex[aria-hidden="true"] {
  display: none;
}

div.arithmatex {
  display: block;
  overflow-x: auto;
  padding: 0.75rem 0;
  margin: 1.25rem 0;
  text-align: center;
}

/* Mermaid Diagram Container */
.mermaid-container {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.75rem 0;
  display: flex;
  justify-content: center;
  overflow-x: auto;
}

.mermaid {
  text-align: center;
}

/* Syntax Highlighting & Code Block Styling */
.codehilite {
  background: var(--bg-code);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin: 1.5em 0;
  overflow-x: auto;
}

.codehilite pre {
  margin: 0;
  border: none;
  background: transparent;
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-footer);
  padding: 2.25rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-link:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

/* ==========================================================================
   Homepage (Front Page) 
   ========================================================================== */

#back-animation {
  background-color: var(--bg-primary);
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.particles-js-canvas-el {
  position: absolute;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
  z-index: 1;
}

#front-page-wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 65%;
  max-width: 960px;
  z-index: 10;
}

.front-page-name {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--text-primary);
  margin: 0 0 0.5rem 0;
  letter-spacing: -0.02em;
}

.front-page-subtitle {
  font-size: clamp(1rem, 1.8vw, 1.35rem);
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0 0 1.75rem 0;
}

.front-page-description {
  max-width: 42rem;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 0 0 1.25rem 0;
}

.home-button-list {
  margin-top: 1.25rem;
}

.home-button-paragraph {
  margin: 0;
  line-height: 1.8;
}

.home-button-heading {
  display: inline;
  margin: 0;
  padding: 0;
  font-size: inherit;
  font-weight: normal;
  border: none;
}

.home-button {
  display: inline-block;
  text-decoration: none;
  color: var(--bg-primary);
  background-color: var(--text-primary);
  font-size: clamp(1.4rem, 2.75vw, 2.25rem);
  font-weight: 700;
  padding: 0.1em 0.25em;
  margin-right: 0.35rem;
  margin-bottom: 0.55rem;
  line-height: 1.35;
  transition: background-color 0.15s ease-in-out;
  border-radius: 0;
}

.home-button:hover {
  background-color: var(--accent-color);
  color: var(--bg-primary);
}

#home-footer {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  position: absolute;
  bottom: 3%;
  left: 50%;
  transform: translate(-50%, 0%);
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
  z-index: 10;
  width: 90%;
  max-width: 500px;
}

@media (max-width: 768px) {
  #front-page-wrapper {
    width: 88%;
  }

  .front-page-name {
    font-size: 2.15rem;
  }

  .front-page-subtitle {
    font-size: 1.05rem;
    margin-bottom: 1.25rem;
  }

  .home-button {
    font-size: 1.35rem;
    margin-right: 0.25rem;
    margin-bottom: 0.45rem;
  }

  #home-footer {
    bottom: 2%;
    font-size: 0.8rem;
  }
}