:root {
  color-scheme: light;
  --paper: #ffffff;
  --surface: #ffffff;
  --ink: #172522;
  --muted: #64726e;
  --rule: #e2e8e6;
  --signal: #2f6f65;
  --signal-soft: color-mix(in srgb, var(--signal) 11%, transparent);
  --surface-muted: color-mix(in srgb, var(--surface) 72%, #f3f6f5);
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Consolas, monospace;
  --content-width: 74rem;
  --page-gutter: clamp(1rem, 4vw, 2.5rem);
  --radius: 0.75rem;
}

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

html {
  min-width: 20rem;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  color: inherit;
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

::selection {
  background: var(--signal);
  color: var(--surface);
}

[hidden] {
  display: none !important;
}

:where(a, button, input):focus-visible {
  outline: 0.2rem solid color-mix(in srgb, var(--signal) 72%, transparent);
  outline-offset: 0.18rem;
}

.skip-link {
  position: fixed;
  z-index: 100;
  inset: 0.75rem auto auto 0.75rem;
  padding: 0.65rem 0.85rem;
  transform: translateY(-180%);
  border: 1px solid var(--signal);
  border-radius: 0.4rem;
  background: var(--surface);
  color: var(--ink);
  font-weight: 700;
}

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

.header-inner,
.hero,
.featured,
.feed,
.footer-inner {
  width: min(calc(100% - (2 * var(--page-gutter))), var(--content-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.header-inner {
  display: flex;
  min-height: 3.75rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.wordmark {
  color: var(--ink);
  font-size: 1.04rem;
  font-weight: 760;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.wordmark-accent {
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.92em;
  font-weight: 650;
  letter-spacing: -0.04em;
}

.updated {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.hero {
  display: grid;
  min-height: clamp(10rem, 19vw, 13rem);
  align-content: center;
  padding-block: clamp(2.25rem, 6vw, 4rem);
  border-bottom: 1px solid var(--rule);
}

.hero-kicker,
.section-kicker {
  margin: 0 0 0.65rem;
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-title {
  max-width: 18ch;
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.65rem);
  font-weight: 760;
  letter-spacing: -0.055em;
  line-height: 0.98;
  text-wrap: balance;
}

.hero-copy {
  max-width: 59ch;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  text-wrap: pretty;
}

.featured,
.feed {
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.featured + .feed {
  padding-top: 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-title,
.featured > h2,
.feed > h2 {
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 720;
  letter-spacing: -0.035em;
}

.section-note {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 1.75rem);
}

.featured-card {
  display: flex;
  min-width: 0;
  min-height: 13.25rem;
  flex-direction: column;
  padding: 1rem 0 1.15rem;
  border-top: 0.15rem solid var(--ink);
  border-bottom: 1px solid var(--rule);
}

.featured-card .news-meta {
  margin-bottom: 1.25rem;
}

.featured-card .news-title {
  margin-bottom: 0.7rem;
  font-size: clamp(1.08rem, 1.8vw, 1.38rem);
}

.featured-card .news-summary {
  display: -webkit-box;
  margin-bottom: 1.2rem;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.featured-card .tags,
.featured-card .news-summary + .news-actions {
  margin-top: auto;
}

.featured-card .tags + .news-actions {
  margin-top: 0.7rem;
}

.filter-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(12rem, 18rem) auto;
  align-items: center;
  gap: 0.85rem 1rem;
  margin-bottom: 1rem;
  padding-block: 0.75rem;
  border-block: 1px solid var(--rule);
}

.filter-list {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.filter-list [data-filter] {
  min-height: 2.35rem;
  padding: 0.42rem 0.62rem;
  border: 0;
  border-radius: 0.35rem;
  background: transparent;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 620;
  line-height: 1;
  transition: background-color 140ms ease, color 140ms ease;
}

.filter-list [data-filter]:hover {
  background: var(--surface-muted);
  color: var(--ink);
}

.filter-list [data-filter][aria-pressed="true"] {
  background: var(--signal-soft);
  color: var(--signal);
}

.search-field {
  display: grid;
  gap: 0.3rem;
  margin: 0;
}

.search-field label,
.search-label {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.035em;
}

#news-search {
  width: 100%;
  min-height: 2.45rem;
  padding: 0.48rem 0.68rem;
  border: 1px solid var(--rule);
  border-radius: 0.45rem;
  background: var(--surface);
  font-size: 0.9rem;
  transition: border-color 140ms ease;
}

#news-search::placeholder {
  color: var(--muted);
  opacity: 0.82;
}

#news-search:hover,
#news-search:focus-visible {
  border-color: var(--signal);
}

#result-count {
  justify-self: end;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  white-space: nowrap;
}

.feed-list {
  display: grid;
  gap: 0.7rem;
}

.news-card[data-category] {
  position: relative;
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(7.75rem, 0.23fr) minmax(0, 1fr) minmax(7rem, auto);
  grid-template-areas:
    "meta title actions"
    "meta summary actions"
    "meta tags actions";
  gap: 0.35rem clamp(1rem, 2.5vw, 1.65rem);
  padding: 1.2rem 1.2rem 1.2rem 1.65rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 140ms ease, transform 140ms ease;
}

/* The signal register is the page's single recurring brand detail. */
.news-card[data-category]::before {
  position: absolute;
  top: 0.85rem;
  bottom: 0.85rem;
  left: -1px;
  width: 0.18rem;
  border-radius: 0 0.18rem 0.18rem 0;
  background: linear-gradient(
    to bottom,
    var(--signal) 0 1.4rem,
    transparent 1.4rem 2rem,
    var(--rule) 2rem 100%
  );
  content: "";
}

.news-card[data-category]::after {
  position: absolute;
  top: 2.78rem;
  left: -1px;
  width: 0.62rem;
  height: 1px;
  background: var(--signal);
  content: "";
}

.news-card[data-category]:hover,
.news-card[data-category]:focus-within {
  border-color: color-mix(in srgb, var(--signal) 60%, var(--rule));
  transform: translateY(-1px);
}

.news-meta {
  display: flex;
  grid-area: meta;
  align-content: flex-start;
  flex-wrap: wrap;
  gap: 0.12rem 0.28rem;
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.news-meta a {
  color: var(--ink);
}

.news-title {
  grid-area: title;
  min-width: 0;
  margin: 0;
  font-size: clamp(1.04rem, 1.8vw, 1.27rem);
  font-weight: 690;
  letter-spacing: -0.025em;
  line-height: 1.25;
  text-wrap: pretty;
}

.news-title a {
  text-decoration-color: transparent;
  transition: color 140ms ease, text-decoration-color 140ms ease;
}

.news-title a:hover,
.news-title a:focus-visible {
  color: var(--signal);
  text-decoration-color: currentColor;
}

.news-summary {
  grid-area: summary;
  min-width: 0;
  margin: 0;
  color: var(--muted);
  font-size: 0.91rem;
  line-height: 1.55;
  text-wrap: pretty;
}

.tags {
  display: flex;
  grid-area: tags;
  flex-wrap: wrap;
  gap: 0.3rem 0.55rem;
  margin: 0.35rem 0 0;
  padding: 0;
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.68rem;
  list-style: none;
}

.tag {
  overflow-wrap: anywhere;
}

.news-actions {
  display: flex;
  grid-area: actions;
  align-self: start;
  justify-content: flex-end;
  gap: 0.4rem 0.7rem;
  flex-wrap: wrap;
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.69rem;
  text-align: right;
}

.news-actions a {
  color: var(--ink);
  text-decoration-color: var(--rule);
}

.news-actions a:hover,
.news-actions a:focus-visible {
  color: var(--signal);
  text-decoration-color: currentColor;
}

.empty-state {
  padding: 2rem 1.25rem;
  border: 1px dashed var(--rule);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

.site-footer {
  margin-top: clamp(1rem, 4vw, 3rem);
  border-top: 1px solid var(--rule);
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-block: 1.5rem 2.5rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.footer-inner p {
  max-width: 66ch;
  margin: 0;
}

.footer-inner a:hover,
.footer-inner a:focus-visible {
  color: var(--signal);
}

@media (max-width: 56rem) {
  .featured-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .featured-card:last-child {
    grid-column: 1 / -1;
    min-height: auto;
  }

  .filter-bar {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .filter-list {
    grid-column: 1 / -1;
  }

  .news-card[data-category] {
    grid-template-columns: minmax(7.25rem, 0.26fr) minmax(0, 1fr);
    grid-template-areas:
      "meta title"
      "meta summary"
      "meta tags"
      "meta actions";
  }

  .news-actions {
    justify-content: flex-start;
    text-align: left;
  }
}

@media (max-width: 42rem) {
  .site-header {
    position: static;
  }

  .header-inner {
    min-height: 3.35rem;
  }

  .updated {
    max-width: 48%;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero {
    min-height: auto;
    padding-block: 2.25rem 2.5rem;
  }

  .hero-title {
    font-size: clamp(2rem, 11vw, 2.85rem);
  }

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

  .featured-card,
  .featured-card:last-child {
    grid-column: auto;
    min-height: auto;
  }

  .filter-bar {
    grid-template-columns: 1fr;
  }

  .filter-list {
    grid-column: auto;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.3rem;
    scrollbar-width: thin;
  }

  .filter-list [data-filter] {
    flex: 0 0 auto;
  }

  #result-count {
    justify-self: start;
  }

  .news-card[data-category] {
    grid-template-columns: 1fr;
    grid-template-areas:
      "meta"
      "title"
      "summary"
      "tags"
      "actions";
    gap: 0.5rem;
    padding: 1.05rem 1rem 1.1rem 1.35rem;
  }

  .news-card[data-category]::before {
    top: 0.75rem;
    bottom: 0.75rem;
  }

  .news-card[data-category]::after {
    top: 2.68rem;
  }

  .footer-inner {
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .news-card[data-category]:hover,
  .news-card[data-category]:focus-within {
    transform: none;
  }
}