/* ==========================================================================
   1. Core Layout & Typography
   ========================================================================== */

body {
  font-family: 'Roboto Flex', sans-serif;
  color: #000;
  background: #fff;
  font-size: 16px;
  line-height: 1.6;
}

p {
  font-weight: 300;
  margin-bottom: 20px;
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: #bdbdbd;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-color: #000;
}

/* Headings */

h1 {
  color: #3B9AB2;
  opacity: 0.78;
  font-size: 25px;
  font-weight: 700;
  margin-bottom: 20px;
}

.main-content h1:first-child {
  margin-top: 0;
  padding-top: 0;
}

h2 {
  color: #3B9AB2;
  opacity: 0.85;
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 18px 0;
}

h3 {
  color: #000;
  font-size: 16px;
  line-height: 1.4;
  font-weight: 700;
  margin: 0 0 6px 0;
}

.quarto-title-block {
  display: none;
}

/* ==========================================================================
   2. Navigation Bar
   ========================================================================== */

.navbar .navbar-nav {
  margin: 0 auto;
}

.navbar .nav-link {
  color: #000 !important;
  text-decoration: underline;
  text-decoration-color: #bdbdbd;
  text-underline-offset: 3px;
  margin: 0 28px;
  font-weight: 500;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
  color: #3B9AB2 !important;
  text-decoration-color: #3B9AB2;
}

/* ==========================================================================
   3. Homepage Two-Column Layout
   ========================================================================== */

.homepage-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: 1050px;
  margin: 25px auto 40px auto;
  padding: 0 24px;
  align-items: start;
}

/* Left sidebar */

.sidebar-profile {
  text-align: center;
}

.sidebar-profile p {
  margin: 0;
}

.profile-pic {
  display: block;
  width: 230px;
  height: 230px;
  margin: 0 auto 22px auto;
  border-radius: 50%;
  object-fit: cover;
}

.profile-name {
  font-size: 26px;
  font-weight: 700;
  color: #000;
  margin-bottom: 15px;
}

/* Right main column */

.main-content {
  display: flex;
  flex-direction: column;
  max-width: 680px;
}

.lead {
  font-size: 17px;
  line-height: 1.65;
  margin-bottom: 30px;
}

/* Desktop layout */

@media (min-width: 768px) {
  .homepage-container {
    grid-template-columns: 260px minmax(0, 680px);
    gap: 40px;
  }

  .sidebar-profile {
    position: sticky;
    top: 30px;
    text-align: center;
  }

  .profile-pic {
    margin: 0 auto 22px auto;
  }
}

/* ==========================================================================
   4. Academic Content Blocks
   ========================================================================== */

.callout-box {
  background-color: #fafafa;
  border-left: 3px solid #3B9AB2;
  padding: 14px 18px;
  margin: 28px 0;
  border-radius: 0 4px 4px 0;
  font-size: 14.5px;
}

.callout-box p:last-child {
  margin-bottom: 0;
}

.research-section {
  border-top: 1px solid #e5e5e5;
  padding-top: 20px;
  margin-top: 30px;
}

.research-item {
  margin-bottom: 26px;
}

.research-item h3 {
  margin-bottom: 6px;
}

/* Software & CRAN badges */

.software-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.software-badges img {
  height: 20px;
  width: auto;
}

/* ==========================================================================
   5. Social Media Icons & Footer
   ========================================================================== */

.social-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 22px;
}

.social-button {
  padding: 6px 11px;
  font-size: 13px;
  border-radius: 5px;
  color: #555;
  border: 1px solid #c9d8df;
}

.social-button:hover {
  color: white;
  background: #3B9AB2;
  border-color: #3B9AB2;
}

.social-button:hover .social-icons {
  filter: brightness(0) invert(1);
}

.social-icons {
  width: 16px;
  height: 16px;
  object-fit: contain;
  opacity: 1;
  filter: grayscale(100%) brightness(35%);
  transition: all .2s ease;
}

.nav-footer {
  border-top: 1px solid #ddd;
  margin-top: 50px;
  padding-top: 12px;
  color: #aaa;
  font-size: 10px;
  text-align: center;
}

.news-list {
  border-left: 3px solid #3B9AB2;
  padding-left: 18px;
  margin-top: 8px;
  font-size: 15px;
}

.news-list p {
  margin-bottom: 12px;
}

.theme-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 34px 0;
}

.theme-pills span {
  border: 1px solid #d7e6eb;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 13px;
  color: #555;
  background: #fbfbfb;
}

.project-tag {
  display: inline-block;
  margin: 22px 0 8px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Urban interventions */
.tag-blue {
  background: #e8f5f8;
  color: #3B9AB2;
}

/* Urban environment */
.tag-green {
  background: #edf7ef;
  color: #5f8f62;
}

/* Mobility data / software */
.tag-purple {
  background: #f2eef9;
  color: #7562a8;
}

/* Transport modelling */
.tag-brown {
  background: #f8efe5;
  color: #8a6338;
}

/* Mobility inequalities */
.tag-orange {
  background: #fdf2e6;
  color: #c27a1f;
}

.cv-institution {
  color: #3B9AB2;
  font-weight: 500;
}

.cv-date {
  color: #777;
  font-size: 14.5px;
}

.cv-pills ul,
.theme-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding-left: 0;
  margin: 12px 0 28px 0;
}

.cv-pills li,
.theme-pills span {
  border: 1px solid #d7e6eb;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 13px;
  color: #555;
  background: #fbfbfb;
}