@import url("https://fonts.googleapis.com/css2?family=Libre+Baskerville:wght@400;700&display=swap");

:root {
  --bg: #f4efe8;
  --paper: #fbf7f1;
  --text: #1d2430;
  --muted: #626c7c;
  --line: rgba(29, 36, 48, 0.12);
  --accent: #10385f;
  --accent-soft: #dce7f4;
  --warm: #b57b49;
  --shadow: 0 22px 60px rgba(21, 30, 42, 0.1);
  --max-width: 1120px;
}

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

html {
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(181, 123, 73, 0.15), transparent 24%),
    linear-gradient(180deg, #f8f3ec 0%, #f2ede6 100%);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(181, 123, 73, 0.15), transparent 24%),
    linear-gradient(180deg, #f8f3ec 0%, #f2ede6 100%);
  font-family: "Aptos", "Segoe UI", sans-serif;
  line-height: 1.7;
  padding-top: 76px;
}

p {
  text-align: justify;
  text-justify: inter-word;
}

.page-shell {
  min-height: calc(100vh - 76px);
}

a { color: inherit; }
img { display: block; max-width: 100%; }

.container {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: blur(18px);
  background: rgba(248, 243, 236, 0.82);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
  font-family: Georgia, serif;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: #2c2a26;
}

.site-name {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  width: 6.5ch;
  min-height: 42px;
  line-height: 1.02;
  margin-left: 12px;
  padding-left: 12px;
  border-left: 1px solid #bbbbbb;
}

.site-name-line {
  display: flex;
  justify-content: space-between;
}

.site-logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.mobile-nav {
  display: none;
  margin-left: auto;
}

.mobile-nav summary {
  list-style: none;
  cursor: pointer;
}

.mobile-nav summary::-webkit-details-marker {
  display: none;
}

.mobile-nav-icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 42px;
  height: 42px;
  padding: 0 10px;
  border: 1px solid rgba(44, 42, 38, 0.14);
  background: rgba(255, 255, 255, 0.4);
}

.mobile-nav-icon span {
  display: block;
  width: 100%;
  height: 1px;
  background: #666a70;
}

.mobile-nav-panel {
  display: none;
}

.mobile-nav-panel a {
  display: block;
  padding: 0.65rem 0.8rem;
  text-decoration: none;
  color: var(--muted);
}

.mobile-nav-panel a.active,
.mobile-nav-panel a:hover,
.mobile-nav-panel a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent);
  outline: none;
}

.site-nav a {
  padding: 0.55rem 0.9rem;
  text-decoration: none;
  color: var(--muted);
}

.site-nav a.active,
.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent);
  outline: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.72fr);
  gap: 6.4rem;
  align-items: center;
  padding: 4.5rem 0 2rem;
}

.home-main {
  padding-bottom: 5rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--warm);
}

h1, h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.8rem, 5vw, 5rem);
  line-height: 1.03;
  max-width: 11ch;
}

h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }

.lead {
  max-width: 42rem;
  margin: 1.3rem 0 0;
  font-size: 1.7rem;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--muted);
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.contact-button {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.72rem 1rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  color: var(--accent);
  font-size: 0.96rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 10px 28px rgba(21, 30, 42, 0.06);
}

.contact-button:hover,
.contact-button:focus-visible {
  background: var(--accent-soft);
  outline: none;
}

.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  font-size: 1rem;
  line-height: 1;
}

.content-card p,
.paper-authors,
.paper-abstract-panel p {
  font-family: Georgia, "Times New Roman", serif;
}

.portrait-panel,
.news-card,
.content-card {
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow);
}

.portrait-panel { padding: 0.8rem; }


.portrait-image {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.news-card,
.content-card {
  padding: 2rem;
  margin: 1rem 0 5rem;
}

.section-heading { margin-bottom: 1.4rem; }

.news-item {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 1.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.news-date {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
}

.inner-page { padding: 4.25rem 0 5rem; }

.inner-page h1 {
  margin-bottom: 2rem;
}

.research-section + .research-section {
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line);
}

.research-heading {
  margin-bottom: 1.25rem;
}

.paper-entry + .paper-entry {
  margin-top: 1.5rem;
}

.paper-title {
  margin: 0 0 0.2rem;
  font-size: 1.22rem;
  font-weight: 700;
  font-family: Georgia, "Times New Roman", serif;
}

.paper-authors {
  margin: 0 0 1rem;
  color: var(--muted);
}

.paper-authors a {
  text-decoration: none;
  color: var(--accent);
}

.paper-authors a:hover,
.paper-authors a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.paper-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.9rem;
}

.paper-action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.55rem;
}

.paper-action-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.42rem 0.8rem;
  border: 0;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
  font-family: inherit;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
}

.paper-action-button[aria-expanded="true"] {
  background: rgba(16, 56, 95, 0.18);
}

.paper-abstract-panel {
  width: 100%;
}

.paper-abstract-panel p {
  margin: 0;
  width: calc(100% - 1.5rem);
  margin-left: auto;
  margin-right: auto;
}

.document-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1.4rem;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.82rem 1.22rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.mobile-cv-card {
  display: none;
}

.document-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}

.pdf-viewer {
  width: 100%;
  min-height: 980px;
}

@media (max-width: 860px) {
  .hero,
  .news-item {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
    gap: 1.5rem;
  }
}

@media (max-width: 560px) {
  body {
    padding-top: 0;
  }

  .page-shell {
    min-height: 100vh;
  }

  .site-header {
    position: sticky;
  }

  .nav-wrap {
    flex-wrap: wrap;
    align-items: center;
  }

  .desktop-nav {
    display: none;
  }

  .mobile-nav {
    display: block;
  }

  .mobile-nav[open] + .mobile-nav-panel {
    display: flex;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    padding: 0.65rem 0 0;
  }

  .mobile-nav-panel a {
    display: block;
    padding: 0.55rem 0.9rem;
  }

  .hero {
    padding-top: 4rem;
  }

  .lead {
    font-size: 1.24rem;
  }

  .news-card,
  .content-card,
  .portrait-panel {
    padding: 1.25rem;
  }

  .contact-links {
    flex-wrap: nowrap;
    gap: 0.4rem;
  }

  .contact-button {
    flex: 1 1 0;
    justify-content: center;
    gap: 0.28rem;
    min-width: 0;
    padding: 0.62rem 0.35rem;
    font-size: 0.74rem;
    white-space: nowrap;
  }

  .contact-icon {
    min-width: auto;
    font-size: 0.84rem;
  }

  .mobile-cv-card {
    display: block;
  }

  .mobile-cv-card p {
    margin: 0 0 1rem;
    color: var(--muted);
    text-align: left;
  }

  .mobile-cv-card .button-link {
    width: 100%;
  }

  .document-frame {
    display: none;
  }

  .pdf-viewer { min-height: 78vh; }
}