/* Onno Steenweg — Academic website
   Edit the colours under :root to change the overall visual identity.
   No framework and no external dependencies. */
:root {
  --background: #f9f8f4;
  --surface: #ffffff;
  --surface-soft: #f1f1eb;
  --ink: #182d2e;
  --text: #334344;
  --muted: #667473;
  --brand: #195b58;
  --brand-hover: #104440;
  --line: #dfE5df;
  --accent: #b38153;
  --radius: 17px;
  --content: 1440px;
  --gutter: clamp(1rem, 3vw, 3rem);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: var(--brand); text-underline-offset: 3px; }
a:hover { color: var(--brand-hover); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; border-radius: 4px; }
.site-container { width: min(var(--content), calc(100% - var(--gutter) - var(--gutter))); margin-inline: auto; }
main > .site-container { --gutter: clamp(1.5rem, 7vw, 8rem); max-width: 1280px; }
.skip-link {
  position: absolute; top: -70px; left: 1rem; z-index: 10;
  padding: .7rem 1rem; background: var(--surface); border: 2px solid var(--brand);
}
.skip-link:focus { top: 1rem; }
.site-header { border-bottom: 1px solid var(--line); background: rgba(249,248,244,.96); }
.header-inner {
  display: flex; align-items: center; justify-content: center;
  padding-block: 1rem;
}
.site-nav { display: flex; width: 100%; align-items: center; justify-content: center; gap: .5rem clamp(.25rem, .8vw, .85rem); flex-wrap: wrap; }
.site-nav a { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: .55rem clamp(.5rem, 1vw, .9rem); border-radius: 7px; color: var(--ink); text-decoration: none; font-size: clamp(1rem, 1.15vw, 1.1rem); font-weight: 650; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--brand); }
.site-nav a:hover { background: var(--surface-soft); }
.site-nav a[aria-current="page"] { background: var(--brand); color: white; }
.nav-group { display: contents; }
.nav-submenu { display: none; }
.menu-toggle { display: none; align-items: center; gap: .65rem; min-height: 48px; padding: .6rem .8rem; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); color: var(--ink); font: inherit; font-weight: 650; cursor: pointer; }
.menu-toggle:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.menu-icon { display: grid; gap: 5px; width: 22px; }
.menu-icon span { display: block; height: 2px; width: 22px; background: currentColor; transition: transform .15s, opacity .15s; }
.menu-open .menu-icon span:first-child { transform: translateY(7px) rotate(45deg); }
.menu-open .menu-icon span:nth-child(2) { opacity: 0; }
.menu-open .menu-icon span:last-child { transform: translateY(-7px) rotate(-45deg); }
main { flex: 1; min-width: 0; }
.eyebrow { font-size: .76rem; font-weight: 750; letter-spacing: .13em; text-transform: uppercase; color: var(--brand); margin: 0 0 1rem; }
h1, h2, h3 { color: var(--ink); }
h1, h2 { font-family: Georgia, Cambria, "Times New Roman", serif; font-weight: 500; letter-spacing: -.035em; }
h1 { font-size: clamp(2.7rem, 5vw, 4.7rem); line-height: 1.12; margin: 0 0 1.2rem; }
h2 { font-size: clamp(1.75rem, 3vw, 2.35rem); line-height: 1.23; margin: 0 0 1rem; }
h3 { font-size: 1.05rem; line-height: 1.35; margin: 0 0 .45rem; }
p { margin: 0 0 1rem; }
.lead { font-size: clamp(1.06rem, 1.6vw, 1.23rem); color: #435352; line-height: 1.85; max-width: 65ch; }
.hero { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); align-items: center; padding-block: clamp(3rem, 7vw, 6rem); }
.hero-text { max-width: 680px; }
.hero-name { color: var(--ink); }
.hero-tagline { font-size: 1.13rem; color: var(--muted); font-weight: 500; margin-bottom: 1.9rem; }
.hero-photo { margin: 0; width: 100%; max-width: 460px; min-width: 0; justify-self: end; padding: .65rem; background: var(--surface); border: 1px solid var(--line); border-radius: 22px; box-shadow: 0 18px 50px rgba(24,45,46,.09); }
.hero-photo img { width: 100%; height: auto; border-radius: 14px; }
.hero-links { display: flex; flex-wrap: wrap; gap: .6rem 1.5rem; margin-top: 1.5rem; font-size: .87rem; }
.hero-links a { text-decoration: none; }
.hero-links a:hover { text-decoration: underline; }
.home-page .hero { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 7rem); }
.home-page .hero-name { font-size: clamp(3rem, 5.5vw, 5.3rem); margin-bottom: .6rem; }
.home-page .hero-tagline { color: var(--brand); margin-bottom: 1.8rem; }
.hero-question { font-family: Georgia, Cambria, serif; font-size: clamp(1.8rem, 3vw, 2.6rem); color: var(--ink); line-height: 1.25; letter-spacing: -.025em; max-width: 23ch; }
.hero-affiliation { color: var(--muted); font-size: .95rem; }
.home-page .hero-photo { max-width: 400px; border-radius: 4px; box-shadow: 12px 12px 0 var(--surface-soft); padding: 0; }
.home-page .hero-photo img { border-radius: 3px; }
.research-section, .background-section { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: clamp(2rem, 6vw, 7rem); }
.research-intro > p:last-child { max-width: 42ch; }
.research-project { padding: clamp(1.5rem, 3vw, 3rem); background: #eaf0ec; border-radius: 4px; }
.research-project h3 { font-family: Georgia, Cambria, serif; font-size: clamp(1.7rem, 2.5vw, 2.3rem); font-weight: 500; }
.project-subtitle { color: var(--muted); font-size: .95rem; }
.method-summary { border-top: 1px solid #c8d6ce; margin-block: 1.6rem; padding-top: 1.4rem; }
.method-summary h4 { margin: 0 0 .5rem; color: var(--ink); }
.method-tags { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; padding: 0; margin: 1rem 0 0; }
.method-tags li { padding: .35rem .7rem; background: rgba(255,255,255,.7); border-radius: 4px; font-size: .82rem; color: var(--brand); }
.background-section { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }
.background-section > div > p { max-width: 60ch; }
.home-background { max-width: 900px; }
.home-background p { max-width: 65ch; }
.background-details { margin: 0; }
.background-details > div { padding-block: 1.2rem; border-bottom: 1px solid var(--line); }
.background-details > div:first-child { padding-top: 0; }
.background-details dt { color: var(--brand); font-weight: 700; margin-bottom: .35rem; }
.background-details dd { margin: 0; }
.research-layout { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.research-overview p { max-width: 65ch; }
.research-methods { padding: clamp(1.5rem, 3vw, 2.5rem); background: #eaf0ec; border: 1px solid var(--line); border-radius: var(--radius); }
.research-methods h3 { font-family: Georgia, Cambria, serif; font-size: 1.5rem; font-weight: 500; margin-bottom: 1rem; }
.research-background { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr); gap: clamp(2rem, 5vw, 5rem); }
.research-page .section a { font-weight: 650; }
.home-work-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
.home-work { padding: clamp(1.5rem, 3vw, 2.5rem); background: var(--surface); border: 1px solid var(--line); border-radius: 4px; }
.home-work h3 { font-family: Georgia, Cambria, serif; font-size: 1.6rem; font-weight: 500; margin-bottom: 1rem; }
.home-work a, .research-project > a, .background-section > div > a { font-weight: 650; }
#research { scroll-margin-top: 2rem; }
.media-feature { padding: clamp(1.5rem, 4vw, 2.5rem); background: var(--surface-soft); border-radius: var(--radius); }
.media-feature h3 { font-family: Georgia, Cambria, serif; font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 500; }
.media-feature p { max-width: 65ch; }
.media-feature > a { font-weight: 650; }
.hero-photo figcaption { margin-top: .65rem; font-size: .8rem; color: var(--muted); text-align: center; }
.button-group { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.7rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: 43px; padding: .65rem 1.1rem; border-radius: 7px; background: var(--brand); color: white; font-weight: 650; text-decoration: none; font-size: .91rem; transition: background .15s; }
.button:hover { background: var(--brand-hover); color: white; }
.button-secondary { background: transparent; color: var(--brand); border: 1px solid #b4c6c0; }
.button-secondary:hover { background: var(--surface-soft); color: var(--brand); }
.section { padding-block: 3rem; border-top: 1px solid var(--line); }
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 1rem; margin-bottom: 1.4rem; }
.section-head h2 { margin: 0; }
.section-head a { font-weight: 650; white-space: nowrap; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 1rem; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.55rem; }
.card h3 { font-family: Georgia, Cambria, serif; font-size: 1.27rem; }
.card p:last-child { margin-bottom: 0; }
.card-label { color: var(--brand); font-size: .72rem; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; margin-bottom: .75rem; }
.placeholder { color: var(--muted); }
.page-heading { padding-block: 4.4rem 2rem; }
.page-heading h1 { margin-bottom: .8rem; }
.page-heading .lead { margin-bottom: 0; }
.cv-heading-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem 2rem; }
.cv-heading-row h1 { margin-bottom: 0; }
.cv-heading-row .button { flex-shrink: 0; }
.cv-skills-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; padding-block: 3rem; border-top: 1px solid var(--line); }
.cv-skills-grid > .section { padding: clamp(1.5rem, 3vw, 2.25rem); border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.cv-skills-grid > .section:first-child { background: #eaf0ec; }
.cv-skills-grid h2 { font-size: 1.7rem; margin-bottom: 1.25rem; }
.cv-skills-grid .inline-list { display: flex; flex-wrap: wrap; gap: .65rem; list-style: none; margin: 0; padding: 0; }
.cv-skills-grid .inline-list li { padding: .45rem .8rem; margin: 0; border: 1px solid #d1ded6; border-radius: 5px; background: #f8faf8; color: var(--brand); font-size: .93rem; }
.jump-links { display: flex; gap: .6rem; flex-wrap: wrap; margin: 1.4rem 0 0; }
.jump-links a { display: inline-block; border: 1px solid #cad6d0; background: var(--surface); padding: .45rem .85rem; border-radius: 30px; text-decoration: none; font-size: .87rem; font-weight: 650; }
.engagement-tabs { display: flex; flex-wrap: wrap; gap: .6rem; padding-bottom: 1.5rem; }
.engagement-tabs a { padding: .7rem 1rem; border: 1px solid var(--line); border-radius: 7px; text-decoration: none; font-weight: 650; }
.engagement-tabs a:hover { background: var(--surface-soft); }
.engagement-tabs a[aria-selected="true"] { background: var(--brand); color: white; border-color: var(--brand); }
.engagement-panel[hidden] { display: none; }
.engagement-panel:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
.engagement-panel > .section { padding-block: 1.5rem; border-top: 0; }
.engagement-panel > .section h2 { font-family: inherit; font-size: 1.3rem; font-weight: 650; letter-spacing: normal; }
.record-list { list-style: none; padding: 0; margin: 0; }
.record { display: grid; grid-template-columns: 95px minmax(0, 1fr); gap: 1.5rem; border-bottom: 1px solid var(--line); padding: 1.4rem 0; }
.record:last-child { border-bottom: 0; }
.record-year { color: var(--brand); font-weight: 750; font-size: .93rem; }
.record-title { font-weight: 700; color: var(--ink); margin-bottom: .35rem; }
.record-details { color: var(--muted); font-size: .93rem; margin-bottom: .3rem; }
.record-note { font-size: .94rem; margin: 0; }
.page-column { max-width: var(--content); }
.page-column p, .page-column .inline-list { max-width: 75ch; }
.timeline { border-left: 2px solid #c9d8d1; margin-left: .4rem; padding-left: 1.7rem; }
.timeline-item { position: relative; padding-bottom: 1.7rem; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before { content: ""; position: absolute; width: 10px; height: 10px; border-radius: 50%; background: var(--brand); top: .45rem; left: calc(-1.7rem - 6px); }
.timeline-date { display: block; color: var(--brand); font-weight: 700; font-size: .88rem; margin-bottom: .25rem; }
.timeline-item h3 { margin-bottom: .3rem; }
.timeline-item p { color: var(--muted); margin-bottom: 0; }
.inline-list { margin: .6rem 0 0; padding-left: 1.15rem; }
.inline-list li { margin-bottom: .5rem; }
.profiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 1rem; }
.profile-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; }
.profile-card h2 { font-family: Georgia, Cambria, serif; font-size: 1.45rem; }
.profile-card p { color: var(--muted); font-size: .95rem; }
.profile-status { font-size: .83rem; display: inline-block; color: #64685b; background: var(--surface-soft); padding: .3rem .6rem; border-radius: 5px; }
.profile-url { overflow-wrap: anywhere; font-weight: 650; }
.note { border-left: 3px solid var(--accent); padding: .8rem 1rem; background: #f3efe8; color: #635747; font-size: .92rem; border-radius: 0 6px 6px 0; }
.site-footer { margin-top: 3rem; border-top: 1px solid var(--line); }
.footer-inner { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: space-between; align-items: center; padding-block: 2rem; color: var(--muted); font-size: .85rem; }
.footer-inner a { color: var(--brand); text-decoration: none; }
.footer-links { display: flex; gap: 1rem; flex-wrap: wrap; }
@media (max-width: 780px) {
  .header-inner.nav-ready { flex-wrap: wrap; justify-content: flex-end; padding-block: .75rem; }
  .nav-ready .menu-toggle { display: inline-flex; }
  .nav-ready .site-nav { display: none; }
  .nav-ready.menu-open .site-nav { display: flex; flex-direction: column; align-items: stretch; gap: .25rem; padding-top: .75rem; margin-top: .75rem; border-top: 1px solid var(--line); }
  .nav-ready .site-nav a { justify-content: flex-start; padding: .75rem 1rem; font-size: 1rem; }
  .nav-ready .nav-group { display: block; }
  .nav-ready .nav-group > a { display: flex; }
  .nav-ready .nav-submenu { display: flex; flex-direction: column; gap: .15rem; margin: .35rem 0 .6rem 1.5rem; padding: 0 0 0 .75rem; border-left: 2px solid var(--line); list-style: none; }
  .nav-ready .nav-submenu a { display: flex; min-height: 44px; padding: .5rem .75rem; font-size: .93rem; font-weight: 500; color: var(--muted); }
  .nav-ready .nav-submenu a[aria-current="location"] { background: var(--surface-soft); color: var(--brand); font-weight: 650; }
  .cv-skills-grid { grid-template-columns: 1fr; }
  .site-nav { gap: .4rem; }
  .hero { grid-template-columns: 1fr; padding-block: 3rem; }
  .home-page .hero, .research-section, .background-section, .home-work-grid, .research-layout, .research-background { grid-template-columns: 1fr; }
  .home-page .hero-photo { max-width: 320px; }
  .hero-photo { max-width: 360px; justify-self: center; }
  .section-head { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 520px) {
  .site-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-nav a { padding-inline: .5rem; }
  .site-nav a:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .page-heading { padding-block: 3rem 1.5rem; }
  .record { grid-template-columns: 1fr; gap: .3rem; }
  .hero-tagline { margin-bottom: 1rem; }
  .site-footer { margin-top: 3rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .button, .menu-icon span { transition: none; } }