/*
 * Quinten Thijssen — academic website
 * A compact editorial system for a factual personal profile.
 */

:root {
  color-scheme: light;
  --color-background: #ffffff;
  --color-ink: #111315;
  --color-muted: #5c6268;
  --color-line: #d9dde0;
  --color-accent: #174ea6;
  --color-accent-dark: #103b7f;
  --font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --step--1: clamp(0.76rem, 0.75rem + 0.04vw, 0.8rem);
  --step-0: clamp(0.94rem, 0.92rem + 0.08vw, 1rem);
  --step-1: clamp(1.05rem, 1.01rem + 0.16vw, 1.16rem);
  --step-2: clamp(1.35rem, 1.26rem + 0.34vw, 1.58rem);
  --step-3: clamp(1.75rem, 1.58rem + 0.65vw, 2.15rem);
  --step-4: clamp(2.15rem, 1.9rem + 1vw, 2.9rem);
  --space-1: 0.35rem;
  --space-2: 0.6rem;
  --space-3: 0.9rem;
  --space-4: 1.25rem;
  --space-5: 1.75rem;
  --space-6: 2.5rem;
  --space-7: clamp(3.25rem, 5vw, 4.25rem);
  --site-width: 70rem;
  --text-width: 43rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --header-height: 3.625rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
  margin: 0;
  min-width: 16rem;
  background: var(--color-background);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.62;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--color-accent-dark);
  text-decoration-thickness: 0.07em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-accent);
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: 1px;
}

::selection {
  background: #d7e4fa;
  color: var(--color-ink);
}

.site-shell {
  width: min(100% - (2 * var(--gutter)), var(--site-width));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-2) var(--space-3);
  transform: translateY(-200%);
  background: var(--color-ink);
  color: var(--color-background);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--color-line);
  background: rgb(255 255 255 / 97%);
}

.header-inner {
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.site-name {
  color: var(--color-ink);
  font-size: 0.9rem;
  font-weight: 680;
  letter-spacing: -0.01em;
  line-height: 1;
  text-decoration: none;
}

.site-name:hover {
  color: var(--color-accent-dark);
}

.nav-toggle {
  display: none;
  border: 0;
  padding: var(--space-2) 0;
  background: transparent;
  color: var(--color-ink);
  font: inherit;
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.nav-symbol::after {
  display: inline-block;
  width: 1rem;
  margin-left: var(--space-1);
  content: "+";
  font-size: 1rem;
  font-weight: 400;
}

.nav-toggle[aria-expanded="true"] .nav-symbol::after {
  content: "−";
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 2vw, 1.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: block;
  padding-block: 1.05rem;
  color: var(--color-muted);
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.35rem;
}

h1,
h2,
h3,
p,
dl,
dd {
  margin-top: 0;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  margin-bottom: var(--space-3);
  font-size: var(--step-4);
  font-weight: 620;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

h2 {
  margin-bottom: 0;
  font-size: var(--step-2);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

h3 {
  margin-bottom: var(--space-2);
  font-size: var(--step-1);
  font-weight: 650;
  letter-spacing: -0.015em;
  line-height: 1.35;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(15rem, 0.6fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  padding-block: clamp(4rem, 6vw, 4.75rem);
}

.intro-main {
  max-width: 43rem;
}

.intro-role {
  margin-bottom: var(--space-3);
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.5;
}

.intro-summary {
  max-width: 42rem;
  margin-bottom: 0;
  color: #353a3f;
}

.position-block {
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-ink);
  color: var(--color-muted);
}

.position-block p {
  margin-bottom: 0.15rem;
}

.position-block .institution {
  margin-bottom: var(--space-1);
  color: var(--color-ink);
  font-weight: 650;
}

.content-section {
  padding-block: var(--space-7);
  border-top: 1px solid var(--color-line);
}

.section-heading {
  margin-bottom: var(--space-5);
}

.prose {
  max-width: var(--text-width);
}

.prose p {
  margin-bottom: var(--space-3);
}

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

.publication-list {
  max-width: 52rem;
  border-top: 1px solid var(--color-ink);
}

.publication {
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--color-line);
}

.publication-meta {
  margin-bottom: var(--space-2);
  color: var(--color-accent-dark);
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.45;
}

.publication h3 {
  margin-bottom: var(--space-2);
  font-size: clamp(1.05rem, 1.01rem + 0.16vw, 1.16rem);
  line-height: 1.38;
}

.publication h3 a {
  color: var(--color-ink);
  text-decoration-color: transparent;
  text-decoration-thickness: 0.06em;
  text-underline-offset: 0.16em;
}

.publication h3 a:hover,
.publication h3 a:focus-visible {
  color: var(--color-accent-dark);
  text-decoration-color: currentcolor;
}

.publication-authors,
.publication-citation {
  max-width: 76ch;
  margin-bottom: var(--space-1);
  color: var(--color-muted);
  font-size: clamp(0.86rem, 0.84rem + 0.06vw, 0.92rem);
  line-height: 1.52;
}

.publication-citation {
  color: #454b50;
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin: var(--space-2) 0 0;
  font-size: 0.88rem;
}

.text-link {
  font-weight: 650;
}

.section-link {
  margin: var(--space-4) 0 0;
  font-size: 0.9rem;
}

.background-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2.5rem, 6vw, 4.5rem);
}

.background-group h3 {
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-ink);
}

.background-list {
  margin-bottom: 0;
}

.background-list > div {
  display: grid;
  grid-template-columns: 6.25rem minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-line);
}

.background-list dt {
  color: var(--color-accent-dark);
  font-size: var(--step--1);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
}

.background-list dd {
  margin-bottom: 0;
}

.background-title {
  margin-bottom: 0;
  font-weight: 650;
  line-height: 1.48;
}

.background-detail {
  margin: var(--space-1) 0 0;
  color: var(--color-muted);
  font-size: 0.88rem;
  line-height: 1.52;
}

.recognition-list {
  max-width: 56rem;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-ink);
  list-style: none;
}

.recognition-list li {
  display: grid;
  grid-template-columns: minmax(14rem, 0.8fr) minmax(0, 1.2fr);
  gap: var(--space-5);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-line);
}

.recognition-list h3,
.recognition-list p {
  margin: 0;
}

.recognition-list p {
  color: var(--color-muted);
}

.recognition-date {
  margin-bottom: var(--space-1) !important;
  color: var(--color-accent-dark) !important;
  font-size: var(--step--1);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(10rem, 0.45fr) minmax(18rem, 1fr) minmax(12rem, 0.55fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.contact-layout .section-heading {
  margin-bottom: 0;
}

.contact-details {
  max-width: 30rem;
}

.contact-details p {
  margin-bottom: var(--space-2);
}

.contact-email {
  display: inline-block;
  font-weight: 650;
}

.profile-links {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
}

.profile-links a {
  padding-block: 0.1rem;
}

.site-footer {
  border-top: 1px solid var(--color-line);
}

.footer-inner {
  padding-block: var(--space-5);
  color: var(--color-muted);
  font-size: var(--step--1);
}

.footer-inner p {
  margin: 0;
}

.error-page {
  display: grid;
  min-height: calc(100svh - var(--header-height) - 4.5rem);
  align-items: center;
  padding-block: var(--space-6);
}

.error-page > div {
  max-width: 38rem;
}

.error-code {
  margin-bottom: var(--space-2);
  color: var(--color-accent-dark);
  font-size: var(--step--1);
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.error-page h1 {
  font-size: var(--step-3);
}

.error-page .lede {
  color: var(--color-muted);
}

@media (max-width: 62rem) {
  .background-columns {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .background-group {
    max-width: 44rem;
  }
}

@media (max-width: 52rem) {
  .header-inner {
    position: relative;
  }

  .js .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    z-index: 10;
    top: 100%;
    right: calc(-1 * var(--gutter));
    left: calc(-1 * var(--gutter));
    padding: var(--space-1) var(--gutter) var(--space-3);
    border-bottom: 1px solid var(--color-line);
    background: var(--color-background);
  }

  .js .site-nav {
    display: none;
  }

  .js .site-nav[data-open="true"] {
    display: block;
  }

  .site-nav ul {
    display: block;
  }

  .site-nav a {
    padding-block: var(--space-3);
    border-bottom: 1px solid var(--color-line);
    font-size: 0.88rem;
  }

  .site-nav li:last-child a {
    border-bottom: 0;
  }

  .intro {
    grid-template-columns: 1fr;
    gap: var(--space-5);
    padding-block: clamp(2.75rem, 8vw, 3.25rem);
  }

  .position-block {
    max-width: 28rem;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .contact-layout .section-heading {
    margin-bottom: var(--space-1);
  }
}

@media (max-width: 40rem) {
  :root {
    --space-7: clamp(2.75rem, 10vw, 3.25rem);
  }

  .publication {
    padding-block: var(--space-4);
  }

  .background-list > div {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .recognition-list li {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  :root {
    --color-background: #fff;
    --color-ink: #000;
    --color-muted: #333;
    --color-line: #aaa;
  }

  body {
    font-size: 10.5pt;
  }

  .skip-link,
  .site-header,
  .site-footer {
    display: none !important;
  }

  .intro,
  .content-section {
    padding-block: 1.5rem;
  }

  .publication,
  .background-list > div,
  .recognition-list li {
    break-inside: avoid;
  }

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