@font-face {
  font-family: "Instrument Sans";
  src: url("fonts/instrument-sans.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
:root {
  color-scheme: light;
  --ground: #fff;
  --surface: #f6f7f6;
  --raised: #fff;
  --active: #e9ecea;
  --border: #e6e9e7;
  --rule: #eef0ef;
  --control: #cbd1cd;
  --text: #1f201d;
  --muted: #636361;
  --accent: #1b6e66;
  --accent-soft: #edf4f1;
  --radius: 22px;
  --gap: 16px;
  --font: "Instrument Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --ground: #111;
  --surface: #1b1b1b;
  --raised: #141414;
  --active: #2b2b2b;
  --border: #303030;
  --rule: #292929;
  --control: #585858;
  --text: #f2f2f2;
  --muted: #b2b2b2;
  --accent: #8dccba;
  --accent-soft: #202e28;
}
* {
  box-sizing: border-box;
}
html {
  scroll-padding-top: 24px;
}
body {
  margin: 0;
  background: var(--ground);
  color: var(--text);
  font: 14px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}
h1,
h2,
h3,
p {
  margin: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input {
  font: inherit;
  color: inherit;
}
button {
  cursor: pointer;
}
button,
a,
input {
  -webkit-tap-highlight-color: transparent;
}
button {
  background: none;
  border: 0;
}
a,
button {
  touch-action: manipulation;
}
a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}
button:active {
  transform: translateY(1px);
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}
::selection {
  background: var(--accent);
  color: var(--ground);
}
[hidden] {
  display: none !important;
}
.js-only {
  display: none;
}
.js .js-only {
  display: flex;
}
svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}
.container {
  max-width: 1164px;
  padding: 0 32px;
  margin: 0 auto;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.skip-link {
  position: fixed;
  top: 8px;
  left: 16px;
  transform: translateY(-160%);
  padding: 12px 20px;
  background: var(--text);
  color: var(--ground);
  z-index: 30;
  border-radius: 6px;
}
.skip-link:focus {
  transform: none;
}
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 16px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 24px;
}
.header-actions > a {
  font-size: 14px;
}
.icon-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  transition: transform 160ms ease;
}
.icon-button:hover {
  background: var(--active);
  text-decoration: none;
}
.icon-button:disabled {
  opacity: 0.45;
  cursor: default;
}
.intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 16px 0 24px;
}
h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.4;
}
.intro-copy > p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 16px;
}
.intro-copy > .freshness {
  font-size: 12px;
  margin-top: 12px;
}
.intro-stats {
  display: flex;
  gap: 36px;
  flex: none;
}
.intro-stats > div {
  display: flex;
  flex-direction: column;
  gap: 3px;
  color: var(--muted);
  font-size: 12px;
}
.stat-value {
  font-size: 32px;
  line-height: 1.3;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  font-weight: 400;
}
.accent {
  color: var(--accent);
}
.section-heading,
.directory-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}
h2 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}
.section-heading p,
.directory-heading p {
  color: var(--muted);
  font-size: 14px;
  margin-top: 4px;
}
.carousel-controls {
  gap: 8px;
}
.featured-track {
  display: flex;
  gap: var(--gap);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--control) transparent;
  border-radius: var(--radius);
  padding: 2px 0 12px;
  overscroll-behavior-x: contain;
}
.js .featured-track {
  scrollbar-width: none;
}
.js .featured-track::-webkit-scrollbar {
  display: none;
}
.featured-card {
  position: relative;
  display: flex;
  flex: 0 0 calc((100% - 32px) / 3);
  flex-direction: column;
  min-width: 0;
  padding: 0;
  overflow: hidden;
  background: var(--surface);
  border-radius: var(--radius);
  scroll-snap-align: start;
  scroll-margin-inline: 0;
}
.featured-image {
  display: block;
  width: 100%;
  height: 168px;
  object-fit: cover;
  background: var(--active);
}
.featured-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 18px 20px;
}
.featured-card:hover {
  outline: 1px solid var(--control);
  outline-offset: -1px;
}
.featured-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
}
time {
  font-variant-numeric: tabular-nums;
}
.featured-name {
  font-size: 14px;
  color: var(--muted);
  margin: 12px 0 8px;
}
.featured-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  overflow-wrap: anywhere;
}
.featured-title::after {
  position: absolute;
  content: "";
  inset: 0;
  border-radius: var(--radius);
}
.featured-title:focus-visible {
  outline: none;
}
.featured-card:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.read-cue {
  font-size: 12px;
  color: var(--accent);
  margin-top: auto;
  padding-top: 16px;
}
.carousel-pagination {
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}
.carousel-dots {
  display: flex;
  gap: 0;
}
.carousel-dot {
  width: 24px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.carousel-dot::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--control);
}
.carousel-dot[aria-current="true"]::before {
  background: var(--text);
  width: 16px;
  border-radius: 4px;
}
.directory {
  margin-top: 24px;
}
.subscribe-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  font-weight: 500;
  white-space: nowrap;
  color: var(--accent);
}
/* 1100px = 170px category rail + 16px gutter + 914px reading column. */
.directory-layout {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: var(--gap);
  align-items: start;
}
.category-nav {
  position: sticky;
  top: 0;
  padding: 20px 12px 20px 0;
  max-height: 100dvh;
  overflow-y: auto;
  background: var(--ground);
  z-index: 5;
}
.nav-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 12px;
  padding: 0 12px;
}
.nav-items {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.nav-item {
  display: block;
  border-radius: 8px;
  padding: 8px 12px;
  line-height: 20px;
  white-space: nowrap;
}
.nav-item:hover {
  background: var(--surface);
  text-decoration: none;
}
.nav-item[aria-current="true"] {
  background: var(--active);
  font-weight: 600;
}
.directory-content {
  min-width: 0;
}
.toolbar {
  gap: 12px;
  align-items: center;
}
.search-field {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--control);
  border-radius: 999px;
  min-width: 0;
  height: 44px;
  padding: 0 16px;
}
.search-field:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.search-field svg {
  color: var(--muted);
}
input {
  min-width: 0;
  width: 100%;
  background: transparent;
  border: 0;
  outline: none;
  padding: 8px 0;
}
input::placeholder {
  color: var(--muted);
}
input:focus-visible {
  outline: none;
}
kbd {
  font: 12px var(--font);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0 6px;
  border-radius: 4px;
}
.filter-button {
  border: 1px solid var(--control);
  border-radius: 999px;
  padding: 0 16px;
  height: 44px;
  white-space: nowrap;
}
.filter-button:hover {
  border-color: var(--text);
}
.filter-button[aria-pressed="true"] {
  background: var(--text);
  color: var(--ground);
  border-color: var(--text);
}
.result-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  color: var(--muted);
  font-size: 12px;
}
.result-summary button {
  color: var(--accent);
  padding: 8px 0;
}
.category {
  scroll-margin-top: 24px;
  margin-bottom: 28px;
}
.category-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--surface);
  border-radius: 8px;
  padding: 10px 16px;
}
.category-heading h2 {
  font-size: 16px;
}
.category-count {
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.feed-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) 48px;
  gap: 24px;
  align-items: start;
  padding: 24px 16px;
  border-bottom: 1px solid var(--rule);
}
.feed-row:last-child {
  border: 0;
}
.feed-row:focus-within {
  background: var(--surface);
  border-radius: 8px;
}
.feed-identity h3 {
  font-size: 16px;
  line-height: 1.5;
  font-weight: 600;
  overflow-wrap: anywhere;
}
.feed-description {
  color: var(--muted);
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
.feed-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
  margin: 2px 0 8px;
}
.recent-mark {
  color: var(--accent);
}
.recent-mark::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  margin-right: 5px;
  vertical-align: middle;
}
.article-link {
  font-size: 14px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}
.home-link {
  font-size: 12px;
  color: var(--muted);
  min-height: 44px;
  display: flex;
  align-items: flex-start;
  gap: 3px;
  padding-top: 4px;
  white-space: nowrap;
}
.missing {
  font-size: 13px;
  color: var(--muted);
}
.empty-state {
  padding: 40px 24px;
  background: var(--surface);
  border-radius: var(--radius);
}
.empty-state p {
  margin: 10px 0 20px;
  color: var(--muted);
}
.contribute {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 32px;
  background: var(--surface);
  border-radius: var(--radius);
  margin: 40px 0;
}
.contribute h2 {
  font-size: 18px;
}
.contribute p {
  margin-top: 8px;
  color: var(--muted);
}
.contribute > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  white-space: nowrap;
  color: var(--accent);
}
footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 12px;
  padding: 0 0 32px;
}
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  background: var(--ground);
  z-index: 10;
  font-size: 20px;
}
@media (min-width: 1440px) {
  .back-to-top {
    right: max(24px, calc((100vw - 1250px) / 2));
  }
}
@media (max-width: 1000px) {
  .container {
    padding: 0 24px;
  }
  .intro {
    align-items: flex-start;
  }
  .intro-stats {
    gap: 24px;
  }
  .intro-copy > p {
    max-width: 30em;
  }
  .featured-card {
    flex-basis: calc((100% - 16px) / 2);
  }
  .directory-layout {
    display: block;
  }
  .category-nav {
    position: sticky;
    top: 0;
    padding: 10px 0;
    margin: 0 0 16px;
    overflow: visible;
  }
  .nav-label {
    display: none;
  }
  .nav-items {
    flex-direction: row;
    overflow-x: auto;
    gap: 4px;
    scrollbar-width: thin;
  }
  .nav-item {
    flex: none;
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  .directory-content {
    position: relative;
  }
  .category {
    scroll-margin-top: 80px;
  }
  .feed-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) 48px;
    gap: 16px;
  }
  .back-to-top {
    bottom: 16px;
    right: 16px;
  }
  .contribute {
    padding: 24px;
  }
}
@media (max-width: 600px) {
  .container {
    padding: 0 20px;
  }
  .masthead {
    min-height: 72px;
  }
  .brand {
    font-size: 14px;
    gap: 6px;
  }
  .brand img {
    width: 24px;
    height: 24px;
  }
  .header-actions {
    gap: 12px;
  }
  .header-actions > a {
    font-size: 12px;
  }
  .intro {
    padding: 20px 0 28px;
    display: block;
  }
  h1 {
    font-size: 26px;
  }
  .intro-copy > p {
    font-size: 14px;
    margin-top: 8px;
  }
  .intro-copy > .freshness {
    margin-top: 12px;
  }
  .intro-stats {
    margin-top: 24px;
    justify-content: space-between;
    padding-right: 16px;
  }
  .stat-value {
    font-size: 26px;
  }
  .intro-stats > div {
    font-size: 12px;
  }
  .section-heading {
    margin-bottom: 12px;
  }
  .section-heading p {
    display: none;
  }
  .featured-card {
    flex-basis: 100%;
    padding: 0;
  }
  .featured-image {
    height: 168px;
  }
  .featured-name {
    margin-top: 8px;
  }
  .featured-title {
    font-size: 18px;
    -webkit-line-clamp: 3;
  }
  .read-cue {
    padding-top: 16px;
  }
  .carousel-dot {
    width: 25px;
    height: 44px;
  }
  .carousel-pagination {
    margin-top: 0;
  }
  .directory {
    margin-top: 24px;
  }
  .directory-heading {
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
  }
  .directory-heading p {
    display: none;
  }
  .subscribe-link {
    font-size: 12px;
    gap: 6px;
  }
  .subscribe-link svg {
    width: 16px;
  }
  .toolbar {
    flex-wrap: wrap;
    gap: 8px;
  }
  .search-field {
    padding: 0 12px;
  }
  .search-field kbd {
    display: none;
  }
  .filter-button {
    padding: 0 12px;
    font-size: 12px;
  }
  .search-field input {
    font-size: 14px;
  }
  .nav-item {
    padding: 8px 12px;
  }
  .category-nav {
    margin-bottom: 12px;
  }
  .result-summary {
    min-height: 44px;
  }
  .feed-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    padding: 20px 12px;
  }
  .feed-identity {
    grid-column: 1/-1;
  }
  .feed-description {
    font-size: 14px;
  }
  .feed-article {
    min-width: 0;
  }
  .home-link {
    align-self: end;
    align-items: center;
    padding: 0;
  }
  .category {
    margin-bottom: 20px;
  }
  .category-heading {
    padding: 10px 12px;
  }
  .contribute {
    display: block;
    margin: 24px 0;
    padding: 24px 20px;
  }
  .contribute h2 {
    font-size: 16px;
  }
  .contribute p {
    font-size: 14px;
  }
  .contribute > a {
    margin-top: 12px;
  }
  .empty-state {
    padding: 24px 20px;
  }
  .empty-state h2 {
    font-size: 16px;
  }
  footer {
    display: block;
    padding-bottom: 80px;
  }
  footer > span {
    display: block;
    margin-top: 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

.js .mobile-categories {
  display: none;
}
@media (max-width: 600px) {
  .js .category-nav .nav-items {
    display: none;
  }
  .js .mobile-categories {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    min-height: 44px;
    font-size: 14px;
  }
  .mobile-categories select {
    font: inherit;
    flex: 1;
    max-width: 70%;
    min-width: 0;
    height: 44px;
    border: 1px solid var(--control);
    border-radius: 8px;
    background: var(--ground);
    color: var(--text);
    padding: 0 12px;
  }
  .intro-stats {
    margin-top: 16px;
  }
  .intro {
    padding: 16px 0 20px;
  }
  .intro-copy > .freshness {
    margin-top: 8px;
  }
}