/* ==========================================================================
   custom.css — visual refresh layer on top of academic.css
   Loaded after academic.css; only overrides, no framework code.
   ========================================================================== */

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --text-primary: #1f2937;
  --text-muted: #6b7280;
  --border-color: #e5e7eb;
  --section-bg: #ffffff;
  --section-alt-bg: #f9fafb;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */

html {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media screen and (min-width: 58em) {
  html {
    font-size: 16px;
  }
}

body {
  font-family: inherit;
  color: var(--text-primary);
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

a {
  color: var(--primary);
}

a:hover {
  color: var(--primary-dark);
}

/* --------------------------------------------------------------------------
   Navbar
   -------------------------------------------------------------------------- */

.navbar {
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  backdrop-filter: saturate(180%) blur(8px);
  box-shadow: none;
  border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

#navbar-main .main-menu-item ul li .nav-link {
  color: var(--text-muted);
  font-weight: 500;
  position: relative;
  transition: color 0.15s ease;
}

#navbar-main .main-menu-item ul li .nav-link:hover {
  color: var(--text-primary);
}

#navbar-main .main-menu-item ul li .nav-link.active {
  color: var(--primary);
}

#navbar-main .main-menu-item ul li .nav-link.active::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: -2px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

.home-section {
  background-color: var(--section-bg);
  padding: 72px 0;
}

.home-section:first-of-type {
  padding-top: 56px;
}

#publications {
  background-color: var(--section-alt-bg);
}

@media screen and (max-width: 768px) {
  .home-section {
    padding: 48px 0;
  }

  .home-section:first-of-type {
    padding-top: 32px;
  }
}

.section-heading h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 10px 0;
}

/* --------------------------------------------------------------------------
   Profile sidebar
   -------------------------------------------------------------------------- */

#profile {
  text-align: center;
}

.portrait {
  width: 180px;
  height: 180px;
  border: 4px solid #fff;
  box-shadow: 0 0 0 1px var(--border-color), 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* CSS-only fallback avatar shown when no image asset exists */
.portrait-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 180px;
  height: 180px;
  margin: 0 auto;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 4rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  box-shadow: 0 0 0 1px var(--border-color), 0 8px 24px rgba(0, 0, 0, 0.08);
  -webkit-user-select: none;
  user-select: none;
}

.portrait-title h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 18px 0 4px 0;
}

.portrait-role {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 4px 0;
}

#profile .network-icon {
  margin-top: 20px;
}

.network-icon li:hover {
  opacity: 1;
}

.network-icon li a {
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.network-icon li a:hover {
  color: var(--primary);
}

.big-icon {
  font-size: 1.5rem;
}

/* --------------------------------------------------------------------------
   About content
   -------------------------------------------------------------------------- */

#about h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

ul.ul-interests li {
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

/* Experience as a clean timeline with a left accent border */
ul.ul-edu {
  border-left: 2px solid var(--border-color);
  margin-left: 0.25rem;
  padding-left: 1.1rem;
}

ul.ul-edu li {
  padding: 0 0 1rem 0;
}

ul.ul-edu li:last-child {
  padding-bottom: 0;
}

ul.ul-edu li .fa-li {
  color: var(--primary);
}

ul.ul-edu li .description p.course {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

ul.ul-edu li .description p.institution {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Publications
   -------------------------------------------------------------------------- */

.view-list-item {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.view-list-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.pub-icon {
  color: var(--primary);
  opacity: 0.8;
}

.pub-title {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
}

.pub-title:hover {
  color: var(--primary);
}

.pub-venue {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.pub-authors {
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-top: 0.25rem;
}

/* --------------------------------------------------------------------------
   Blog
   -------------------------------------------------------------------------- */

.blog-list-item {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

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

.blog-title {
  display: block;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.blog-title:hover {
  color: var(--primary);
}

.blog-list-item .article-metadata {
  margin-top: 0.35rem;
}

.blog-excerpt {
  margin-top: 0.4rem;
  color: var(--text-muted);
}

.article-footer-nav {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

/* --------------------------------------------------------------------------
   Footer (minimal)
   -------------------------------------------------------------------------- */

footer {
  margin-top: 4rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border-color);
}

.site-footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

footer a.back-to-top i {
  color: var(--text-muted);
}

footer a.back-to-top:hover i {
  color: var(--primary);
}