/* LOCAL FONTS — CMU Serif */

@font-face {
  font-family: "CMU Serif";
  src: url("./fonts/cmunrm.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "CMU Serif";
  src: url("./fonts/cmunbx.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "CMU Serif";
  src: url("./fonts/cmunti.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "CMU Serif";
  src: url("./fonts/cmunbi.woff2") format("woff2");
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

/* VARIABLES */

:root {
  --white: #ffffff;
  --bg: #fafaf8;
  --fg: #1a1a1a;
  --fg-soft: #383838;
  --fg-muted: #6e6e6e;
  --fg-subtle: #adadad;
  --green: #4a7540;
  --green-dark: #345428;
  --green-faint: rgba(74, 117, 64, 0.07);
  --rule: #e2e2e0;
  --rule-soft: #ebebea;

  --font-display: Georgia, "Times New Roman", serif;
  --font-serif: "CMU Serif", Georgia, serif;
  --font-sans: "Source Sans 3", system-ui, -apple-system, sans-serif;

  --sidebar-w: 230px;
  --header-h: 102px;
  --max-w: 920px;
  --transition: 0.18s ease;
}

/* RESET & BASE */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
  font-size: 16px;
}

body {
  background: var(--white);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--green);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--green-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

ul {
  list-style: none;
}

/* HEADER */

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--rule);
  padding: 1.8rem 2rem 0.8rem;
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  text-align: center;
}

.site-name {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 400;
  color: var(--fg);
  letter-spacing: 0.04em;
  line-height: 1;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  list-style: none;
  gap: 0;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--fg-muted);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  transition: color var(--transition);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--green);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  align-self: flex-end;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--fg);
  border-radius: 1px;
  transition:
    transform var(--transition),
    opacity var(--transition);
}

/* LAYOUT */

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 2.25rem 0;
}

.section-rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--fg);
  margin-bottom: 1.25rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule);
}

/* FADE-IN */

.fade-in {
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-delay {
  transition-delay: 0.16s;
}

/* ABOUT */

.about-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.75rem 2rem 2rem;
}

.about-inner {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  gap: 3.5rem;
  align-items: start;
}

.about-bio {
  font-family: var(--font-serif);
  font-size: 1.01rem;
  color: var(--fg-soft);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  text-align: justify;
  text-indent: 1.6em;
  hyphens: auto;
  -webkit-hyphens: auto;
}

.about-bookshelf {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.55;
}

.about-bookshelf a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-style: normal;
}

.about-sidebar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding-top: 0.5rem;
}

.about-photo img {
  width: var(--sidebar-w);
  height: auto;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.about-photo.no-photo {
  width: var(--sidebar-w);
  height: 286px;
  background: var(--rule-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.76rem;
  color: var(--fg-muted);
  text-align: center;
  padding: 1rem;
}

.about-identity {
  margin-top: 1.15rem;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.22rem;
}

.rg-link {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  text-decoration: none;
  margin-bottom: 0.6rem;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.rg-link:hover {
  opacity: 1;
  text-decoration: none;
}

.rg-icon {
  height: 26px;
  width: auto;
  display: block;
}

.rg-label {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  transition: color var(--transition);
}

.rg-link:hover .rg-label {
  color: var(--green);
}

.about-identity::after {
  content: "";
  display: block;
  width: 28px;
  height: 1px;
  background: var(--rule);
  margin: 0.5rem auto 0.3rem;
  order: 1;
}

.about-role-title {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 400;
  color: var(--fg);
  letter-spacing: 0.01em;
  line-height: 1.35;
  max-width: 100%;
}

.about-role-dept {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.87rem;
  color: var(--fg-soft);
  line-height: 1.35;
}

.about-role-inst {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  color: var(--fg-muted);
  line-height: 1.5;
  margin-top: 0.1rem;
}

/* DATA TABLE */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.925rem;
}

.data-table td {
  padding: 0.7rem 0;
  vertical-align: top;
  line-height: 1.6;
}

.data-table tbody tr + tr td {
  border-top: 1px solid var(--rule-soft);
}

.col-year {
  width: 64px;
  color: var(--fg-subtle);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  padding-right: 1.5rem;
  white-space: nowrap;
  padding-top: 0.78rem;
}

.data-table strong {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 400;
  color: var(--fg);
  letter-spacing: 0.01em;
}

.inst-name {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.86rem;
  color: var(--fg-muted);
}

.sub-text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.84rem;
  color: var(--fg-muted);
}

/* EXPERIENCE */

.exp-item {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--rule-soft);
}

.exp-item:first-of-type {
  padding-top: 0;
}

.exp-item:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.exp-role {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--fg);
  letter-spacing: 0.01em;
  line-height: 1.3;
}

.exp-date {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--fg-subtle);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

.exp-place {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.875rem;
  color: var(--fg-muted);
  margin: 0.12rem 0 0.15rem;
  line-height: 1.5;
}

.plain-list {
  padding: 0;
}

.plain-list li {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--fg-muted);
  padding: 0.05rem 0 0.05rem 1.1rem;
  position: relative;
  line-height: 1.6;
}

.plain-list li::before {
  content: "\2013";
  position: absolute;
  left: 0;
  color: var(--fg-subtle);
}

/* PUBLICATIONS */

.pub-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.pub-item {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--rule-soft);
}

.pub-item:first-of-type {
  padding-top: 0;
}

.pub-item:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.pub-ref {
  font-family: var(--font-serif);
  font-size: 0.97rem;
  color: var(--fg-soft);
  line-height: 1.85;
}

.pub-authors {
  font-family: var(--font-serif);
  font-weight: 400;
  color: var(--fg);
}

.pub-ref a {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--fg);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: rgba(0, 0, 0, 0.15);
  transition:
    color var(--transition),
    text-decoration-color var(--transition);
}

.pub-ref a:hover {
  color: var(--green);
  text-decoration-color: var(--green);
}

.pub-ref em {
  font-family: var(--font-serif);
  font-style: italic;
}

.pub-doi {
  display: inline-block;
  font-family: "Courier New", monospace;
  font-size: 0.76rem;
  color: var(--fg-subtle);
  letter-spacing: 0.01em;
}

/* GRANTS */

.grants-block {
  margin-top: 0.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--rule-soft);
}

.grants-heading {
  font-family: var(--font-sans);
  font-size: 0.67rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 0.75rem;
}

.grant-amount {
  color: var(--fg-subtle);
  font-size: 0.85em;
}

/* SUPERVISION */

.research-record {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.research-group-label {
  font-family: var(--font-sans);
  font-size: 0.67rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.research-group-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.research-list--wide {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 2.5rem;
}

.research-list {
  display: flex;
  flex-direction: column;
}

.research-list li {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--fg-soft);
  padding: 0.26rem 0 0.26rem 0.9rem;
  position: relative;
  line-height: 1.5;
}

.research-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--green);
  opacity: 0.4;
}

.research-note {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.8em;
  color: var(--fg-subtle);
  margin-left: 0.2rem;
}

/* CONTACT */

.contact-block {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.contact-block p {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--fg-soft);
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.contact-label {
  font-family: var(--font-sans);
  font-size: 0.67rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  min-width: 96px;
  flex-shrink: 0;
}
.bottom-icon {
  width: 64px;
  height: auto;
  opacity: 0.5;
  margin-right: 12px;
}

.site-footer {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  border-top: 1px solid var(--rule);
  padding: 1.75rem 2rem;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--fg-subtle);
  margin-top: 2.5rem;
  letter-spacing: 0.03em;
}

/* RESPONSIVE — tablet */

@media (max-width: 720px) {
  :root {
    --header-h: 88px;
    --sidebar-w: 180px;
  }

  .site-name {
    font-size: 1.95rem;
  }

  .about-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-sidebar {
    order: -1;
    align-items: center;
  }

  .about-photo img {
    width: 170px;
  }

  .about-photo.no-photo {
    width: 170px;
    height: 212px;
  }

  .about-identity {
    margin-top: 1rem;
    text-align: center;
    align-items: center;
  }

  .about-bio {
    text-indent: 0;
    text-align: left;
  }

  .research-list--wide {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    align-items: center;
    width: 100%;
    padding-top: 0.5rem;
    border-top: 1px solid var(--rule);
    margin-top: 0.35rem;
  }

  .nav-links.open {
    display: flex;
  }

  .exp-header {
    flex-direction: column;
    gap: 0.08rem;
  }

  .section-title {
    font-size: 1.45rem;
  }
}

/* MOBILE */

@media (max-width: 480px) {
  .col-year {
    width: 46px;
    padding-right: 0.6rem;
  }

  .contact-block p {
    flex-direction: column;
    gap: 0.1rem;
  }

  .section {
    padding: 1.5rem 0;
  }
}