@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('../fonts/source-sans-3-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'Source Sans 3';
  font-style: italic;
  font-weight: 300 700;
  font-display: swap;
  src: url('../fonts/source-sans-3-latin-italic.woff2') format('woff2');
}

:root {
  /* Pattern groups, colors as in the paper (Fig. 2) */
  --argumentation: #e8452c;
  --flow: #f2a12e;
  --framing: #3fae49;
  --emotion: #1fa3e0;
  --engagement: #e5177e;

  --bg: #f4f3f0;
  --surface: #fff;
  --text: #222;
  --muted: #6b6b6b;
  --line: #dddad3;
  --link: #0b63a8;
  --focus: #0b63a8;

  --radius: 6px;
  --shadow: 0 0 0 1px rgb(0 0 0 / 0.06), 0 2px 10px rgb(0 0 0 / 0.06);
  --wrap: 78rem;
  --gutter: clamp(1rem, 3vw, 2rem);

  font-family:
    'Source Sans 3',
    system-ui,
    -apple-system,
    'Segoe UI',
    sans-serif;
  font-size: 100%;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

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

body {
  margin: 0;
}

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

a {
  color: var(--link);
  text-underline-offset: 0.15em;
  text-decoration-thickness: 1px;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -10rem;
  z-index: 20;
  padding: 0.5rem 1rem;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.skip-link:focus {
  top: 1rem;
}

/* Header */

.site-header {
  z-index: 10;
  background: rgb(255 255 255 / 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.25rem 2rem;
  padding-block: 0.75rem;
}

.brand {
  display: flex;
  flex-direction: column;
  color: inherit;
  text-decoration: none;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.brand-tagline {
  font-size: 0.875rem;
  color: var(--muted);
}

.site-header ul {
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header nav a {
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8125rem;
}

.site-header nav a:hover {
  color: var(--link);
}

/* Intro */

.intro {
  padding-block: clamp(2rem, 6vw, 4rem) 2rem;
}

.intro h1 {
  max-width: 22ch;
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 600;
}

.lede {
  max-width: 44rem;
  margin: 0 0 1.5rem;
  font-size: 1.1875rem;
  font-weight: 300;
}

.cta,
.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
}

.button {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5em;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  background: var(--text);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  background: #000;
}

.button .meta {
  font-weight: 400;
  font-size: 0.875em;
  opacity: 0.75;
}

.button--quiet {
  background: transparent;
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--line);
}

.button--quiet:hover {
  background: var(--surface);
}

/* Filters */

.filters {
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 1.5rem;
  padding-block: 0.75rem;
  background: var(--bg);
}

.filters ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.filter {
  --group: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.35rem 0.8rem;
  border: 0;
  border-radius: 999px;
  background: var(--surface);
  box-shadow: inset 0 0 0 1px var(--line);
  color: var(--text);
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
}

.filter[data-group]:not([data-group=''])::before {
  content: '';
  width: 0.65em;
  height: 0.65em;
  border-radius: 50%;
  background: var(--group);
}

.filter:hover {
  box-shadow: inset 0 0 0 1px var(--group);
}

.filter[aria-pressed='true'] {
  box-shadow: inset 0 0 0 2px var(--group);
}

.filter .count {
  color: var(--muted);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}

.filter-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

/* Cards */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.card[hidden] {
  display: none;
}

.card article {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card:target article {
  box-shadow:
    0 0 0 2px var(--focus),
    var(--shadow);
}

.card-bar {
  display: flex;
  height: 5px;
}

.card-bar span {
  flex: 1;
  background: var(--group);
}

.card-header {
  padding: 1rem 1.25rem 0.75rem;
}

.card h3 {
  margin: 0;
  font-size: 1.3125rem;
  font-weight: 600;
}

.card h3 a {
  color: inherit;
  text-decoration: none;
}

.card h3 a:hover {
  text-decoration: underline;
}

.aka {
  margin: 0.1rem 0 0;
  color: var(--muted);
  font-size: 0.875rem;
  font-style: italic;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.tags li {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}

.tags li::before {
  content: '';
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--group);
}

.card-image {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #eceae5;
  border-block: 1px solid var(--line);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.4s ease;
}

a.card-image:hover img {
  transform: scale(1.03);
}

.card-body {
  flex: 1;
  padding: 1rem 1.25rem 0.25rem;
}

.card h4 {
  margin: 0 0 0.2rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.card p {
  margin: 0 0 1rem;
}

.card-footer {
  padding: 0.75rem 1.25rem 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.9375rem;
}

.card-footer p:last-child,
.card-footer ul:last-child {
  margin-bottom: 0;
}

.card-footer h4:not(:first-child) {
  margin-top: 0.75rem;
}

.links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.archived {
  display: inline-block;
  padding: 0 0.4em;
  border-radius: 3px;
  background: var(--bg);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: 0.1em;
  cursor: help;
}

/* About */

.about {
  margin-top: clamp(3rem, 8vw, 6rem);
  padding-bottom: 3rem;
}

.about h2 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
}

.about h3 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: 1rem clamp(2rem, 5vw, 4rem);
}

.about p {
  max-width: 40rem;
  margin: 0 0 1rem;
}

.group-list {
  display: grid;
  gap: 0.35rem;
  margin: 1.25rem 0;
}

.group-list div {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.5rem;
  padding-left: 0.75rem;
  border-left: 4px solid var(--group);
}

.group-list dt {
  font-weight: 600;
}

.group-list dd {
  margin: 0;
  color: var(--muted);
}

.paper {
  margin-top: 2.5rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.paper .citation {
  max-width: 50rem;
}

.paper .paper-links {
  margin-bottom: 1rem;
}

.note {
  color: var(--muted);
  font-size: 0.9375rem;
}

details summary {
  cursor: pointer;
  font-weight: 600;
}

pre {
  overflow-x: auto;
  margin: 0.75rem 0 0;
  padding: 1rem;
  background: var(--bg);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  line-height: 1.45;
}

.credits {
  margin-top: 2rem;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
}

.site-footer p {
  margin: 0;
  padding-block: 1.5rem;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* Sticky header and filter bar only where there is room for them */
@media (min-width: 48rem) {
  html {
    scroll-padding-top: 8rem;
  }

  .site-header {
    position: sticky;
    top: 0;
  }

  .filters {
    position: sticky;
    top: var(--header-height, 4.25rem);
    /* Extend the background to the page edges so cards scrolling underneath stay hidden */
    box-shadow: 0 0 0 100vmax var(--bg);
    clip-path: inset(0 -100vmax);
  }
}

/* Print: one card per page */

@media print {
  :root {
    background: #fff;
    font-size: 14pt;
  }

  .site-header,
  .skip-link,
  .intro,
  .filters,
  .about,
  .site-footer {
    display: none;
  }

  .wrap {
    max-width: none;
    padding: 0;
  }

  .cards {
    display: block;
  }

  /* Filtered-out cards stay hidden, so you can print a single group */
  .card {
    display: block;
    break-inside: avoid;
    break-after: page;
  }

  .card article {
    box-shadow: none;
    border: 1px solid #999;
    border-radius: 0;
  }

  .card-bar {
    height: 12px;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .tags li::before {
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .card-footer a::after {
    content: ' (' attr(href) ')';
    font-size: 0.75em;
    color: var(--muted);
    word-break: break-all;
  }
}