:root {
  --sidebar-width: 22rem;
  --layout-gap: 2rem;
  --page-padding: 1.4rem;
  --hero-image: url("assets/photo-rio.jpeg");
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  --font-body: "Source Sans 3", "Manrope", sans-serif;
  --font-heading: "Libre Baskerville", "Cardo", serif;
  --body-bg: linear-gradient(180deg, #f3f7fb 0%, #eef3f8 56%, #e8eef5 100%);
  --text-main: #1d3248;
  --text-muted: #4b637d;
  --sidebar-bg: linear-gradient(180deg, #f7fbff 0%, #edf4fb 100%);
  --sidebar-border: #cfddea;
  --hero-overlay:
    linear-gradient(118deg, rgba(7, 22, 40, 0.82), rgba(17, 53, 84, 0.48)),
    linear-gradient(180deg, rgba(6, 16, 30, 0.15), rgba(6, 16, 30, 0.58));
  --nav-bg: rgba(251, 253, 255, 0.92);
  --nav-border: rgba(33, 74, 112, 0.2);
  --tab-bg: #f4f8fc;
  --tab-border: #cfdeea;
  --tab-text: #1b3f62;
  --tab-hover-bg: #e5eff9;
  --tab-active-bg: linear-gradient(135deg, #2f6ea5, #4287c0);
  --tab-active-text: #f6fbff;
  --content-bg: rgba(255, 255, 255, 0.94);
  --content-border: #d5e0eb;
  --content-shadow: 0 12px 28px rgba(16, 41, 66, 0.08);
  --link: #0d4f80;
  --link-hover: #09375b;
  --quick-bg: linear-gradient(135deg, #1a5280, #2b6fa5);
  --quick-text: #f5fbff;
  --quick-border: rgba(24, 79, 124, 0.48);
  font-family: var(--font-body);
  color: var(--text-main);
  background: var(--body-bg);
  line-height: 1.6;
}

a {
  color: var(--link);
  text-underline-offset: 0.15em;
}

a:hover,
a:focus-visible {
  color: var(--link-hover);
}

.site-layout {
  min-height: 100vh;
}

.profile-pane {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-width);
  overflow-y: auto;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  padding: calc(1.3rem + env(safe-area-inset-top)) 1.3rem
    calc(1.5rem + env(safe-area-inset-bottom));
  scrollbar-width: thin;
}

.profile-photo {
  width: min(12.4rem, 100%);
  aspect-ratio: 1;
  object-fit: cover;
  object-position: center 10%;
  border-radius: 50%;
  border: 4px solid #fff;
  display: block;
  margin: 0 auto;
  box-shadow: 0 16px 28px rgba(15, 37, 59, 0.22);
}

.profile-name {
  margin: 1rem 0 0;
  text-align: center;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 2.5vw, 2.35rem);
  line-height: 1.08;
  color: var(--text-main);
}

.profile-role {
  margin: 0.44rem 0 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.45;
}

.profile-biography {
  margin-top: 1.08rem;
  padding-top: 0.95rem;
  border-top: 1px solid var(--sidebar-border);
}

.profile-biography p {
  margin: 0 0 0.86rem;
  color: var(--text-main);
  line-height: 1.58;
}

.profile-biography p:last-child {
  margin-bottom: 0;
}

.profile-pane > p:last-child {
  margin: 1rem 0 0;
}

.main-column {
  min-width: 0;
  margin-left: calc(var(--sidebar-width) + var(--layout-gap));
  padding: var(--page-padding) var(--page-padding) 3rem 0;
}

.content-rail {
  max-width: 72rem;
}

.hero {
  position: relative;
  min-height: clamp(22.5rem, 48vh, 26.5rem);
  border-radius: 1rem;
  overflow: hidden;
  margin-bottom: 1rem;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--hero-overlay), var(--hero-image);
  background-size: cover;
  background-position: center;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 30%;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0), rgba(5, 10, 16, 0.35));
}

.top-nav {
  position: sticky;
  top: 1rem;
  z-index: 30;
  border-radius: 999px;
  border: 1px solid var(--nav-border);
  background: var(--nav-bg);
  box-shadow: 0 12px 24px rgba(11, 24, 38, 0.14);
  backdrop-filter: blur(10px);
}

.top-nav ul {
  list-style: none;
  margin: 0;
  padding: 0.52rem 0.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.top-nav li {
  display: inline-flex;
}

.top-nav a {
  display: inline-block;
  border-radius: 999px;
  border: 1px solid var(--tab-border);
  background: var(--tab-bg);
  color: var(--tab-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.25;
  padding: 0.44rem 0.78rem;
  transition: all 150ms ease;
}

.top-nav a:hover,
.top-nav a:focus-visible {
  background: var(--tab-hover-bg);
}

.top-nav a.is-current,
.top-nav a.is-current:hover,
.top-nav a.is-current:focus-visible {
  border-color: transparent;
  background: var(--tab-active-bg);
  color: var(--tab-active-text);
}

main {
  margin-top: 1rem;
}

main.tabbed-main > section.content-block {
  display: none;
}

main.tabbed-main > section.content-block.is-active-section {
  display: block;
}

.content-block {
  background: var(--content-bg);
  border: 1px solid var(--content-border);
  border-radius: 1rem;
  box-shadow: var(--content-shadow);
  padding: 1.2rem 1.2rem 1.25rem;
}

.content-block + .content-block {
  margin-top: 1rem;
}

.content-block h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  line-height: 1.15;
  color: var(--text-main);
}

.content-block h2::after {
  content: "";
  display: block;
  width: 4.7rem;
  height: 2px;
  margin-top: 0.38rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #66a0d4, #89c3df);
}

.content-block p {
  margin: 0;
  color: var(--text-main);
  line-height: 1.62;
}

.content-block p + p {
  margin-top: 0.78rem;
}

.paper-group {
  margin-top: 1rem;
}

.paper-group h3 {
  display: none;
}

.paper-group h4 {
  margin: 1.2rem 0 0.64rem;
  font-family: var(--font-heading);
  font-size: 1.24rem;
  line-height: 1.25;
  color: var(--text-main);
}

.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.62rem;
}

.plain-list li {
  border: 1px solid var(--content-border);
  border-radius: 0.78rem;
  padding: 0.84rem 0.92rem;
  background: rgba(255, 255, 255, 0.6);
  color: var(--text-main);
  line-height: 1.57;
}

#selected-papers .plain-list .paper-card {
  cursor: pointer;
  transition:
    transform 170ms ease,
    box-shadow 170ms ease,
    border-color 170ms ease;
}

#selected-papers .plain-list .paper-card:hover,
#selected-papers .plain-list .paper-card:focus-visible {
  transform: translateY(-6px);
  border-color: #b7cde2;
  box-shadow: 0 16px 26px rgba(18, 43, 68, 0.17);
}

#selected-papers .paper-title {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.34;
  color: var(--link);
}

#selected-papers .paper-coauthors {
  margin: 0.3rem 0 0;
  color: var(--text-muted);
  font-size: 0.97rem;
  font-style: italic;
}

#selected-papers .paper-meta {
  margin-top: 0.3rem;
  color: var(--text-main);
}

#selected-papers .paper-meta a {
  color: var(--link);
}

.quick-link {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  border-radius: 999px;
  border: 1px solid var(--quick-border);
  background: var(--quick-bg);
  color: var(--quick-text);
  padding: 0.45rem 0.82rem;
  transition: transform 130ms ease;
}

.quick-link:hover,
.quick-link:focus-visible {
  transform: translateY(-1px);
  color: var(--quick-text);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem 1.4rem;
  margin-bottom: 0.6rem;
}

.contact-grid h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--text-main);
}

.contact-grid p {
  margin: 0 0 0.62rem;
}

.contact-meta {
  margin: 0.3rem 0 0;
}

.small-note {
  margin-top: 0.95rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

#vitae .vitae-header {
  margin-bottom: 0.85rem;
}

#vitae .vitae-date {
  margin: 0 0 0.2rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

#vitae .vitae-subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.02rem;
}

#vitae .vitae-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

#vitae .vitae-section {
  margin-top: 0.95rem;
  padding: 0.85rem 0.9rem;
  border-radius: 0.8rem;
  border: 1px solid var(--content-border);
  background: rgba(255, 255, 255, 0.45);
}

#vitae .vitae-grid .vitae-section {
  margin-top: 0;
}

#vitae .vitae-section h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-heading);
  font-size: 1.18rem;
  line-height: 1.25;
  color: var(--text-main);
}

#vitae .vitae-section h4 {
  margin: 0.85rem 0 0.36rem;
  font-size: 0.94rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

#vitae .vitae-list {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.36rem;
}

#vitae .vitae-list li {
  color: var(--text-main);
}

#vitae .vitae-note {
  margin-top: 0.95rem;
  color: var(--text-muted);
  font-size: 0.96rem;
}

#vitae .vitae-note .quick-link {
  margin-left: 0.55rem;
}

main > section[id] {
  scroll-margin-top: 6rem;
}

@media (max-width: 1200px) {
  :root {
    --sidebar-width: 19.5rem;
    --layout-gap: 1.4rem;
    --page-padding: 1rem;
  }
}

@media (max-width: 980px) {
  :root {
    --page-padding: 0.9rem;
  }

  .profile-pane {
    position: static;
    width: 100%;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--sidebar-border);
    padding: 1rem 1rem 1.2rem;
  }

  .profile-photo {
    width: min(11rem, 100%);
  }

  .main-column {
    margin-left: 0;
    padding: 1rem;
  }

  .content-rail {
    max-width: none;
  }

  .hero {
    min-height: 13.5rem;
    margin-bottom: 0.85rem;
  }

  .top-nav {
    position: static;
    border-radius: 0.85rem;
  }

  .top-nav ul {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: thin;
  }

  main {
    margin-top: 0.85rem;
  }

  #vitae .vitae-grid {
    grid-template-columns: 1fr;
  }

  #vitae .vitae-note .quick-link {
    margin: 0.55rem 0 0;
    display: inline-block;
  }
}

@media (max-width: 680px) {
  .top-nav a {
    font-size: 0.87rem;
  }

  .content-block {
    border-radius: 0.85rem;
    padding: 1rem;
  }

  .plain-list li {
    padding: 0.75rem 0.78rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }
}