:root {
  color-scheme: light;
  --bg: #f4f7f6;
  --surface: #ffffff;
  --surface-soft: #eaf0ee;
  --surface-strong: #dfe8e5;
  --text: #10231f;
  --text-soft: #52635f;
  --text-faint: #74827f;
  --line: rgba(16, 35, 31, 0.12);
  --line-strong: rgba(16, 35, 31, 0.2);
  --accent: #087f68;
  --accent-strong: #056653;
  --accent-soft: #d9eee8;
  --blue: #3268b2;
  --blue-soft: #e1eaf7;
  --violet: #7253b8;
  --violet-soft: #ebe5f7;
  --amber: #9a6500;
  --amber-soft: #f8ebcc;
  --shadow: 0 24px 70px rgba(26, 53, 46, 0.09);
  --card-shadow: 0 14px 36px rgba(26, 53, 46, 0.07);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1180px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0c1413;
  --surface: #121d1b;
  --surface-soft: #182522;
  --surface-strong: #20312d;
  --text: #edf5f2;
  --text-soft: #a9bab5;
  --text-faint: #7f928c;
  --line: rgba(226, 244, 238, 0.11);
  --line-strong: rgba(226, 244, 238, 0.2);
  --accent: #4ed0af;
  --accent-strong: #71ddc1;
  --accent-soft: #183d34;
  --blue: #7aaaf0;
  --blue-soft: #1b304b;
  --violet: #b9a0ed;
  --violet-soft: #302746;
  --amber: #ebbd60;
  --amber-soft: #3d321c;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.24);
  --card-shadow: 0 14px 36px rgba(0, 0, 0, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 4%, rgba(34, 168, 137, 0.12), transparent 28rem),
    radial-gradient(circle at 94% 12%, rgba(73, 107, 190, 0.09), transparent 25rem),
    var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 16px;
  line-height: 1.6;
  min-width: 320px;
  transition: background-color 180ms ease, color 180ms ease;
}

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

button,
select {
  cursor: pointer;
}

a {
  color: inherit;
}

.page-shell {
  margin: 0 auto;
  max-width: calc(var(--max-width) + 64px);
  padding: 0 32px;
}

.skip-link {
  background: var(--text);
  border-radius: 0 0 8px 8px;
  color: var(--bg);
  left: 24px;
  padding: 8px 14px;
  position: fixed;
  top: -60px;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

.sr-only {
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

.site-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  min-height: 78px;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 0.94rem;
  font-weight: 700;
  gap: 11px;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 2px;
  height: 26px;
  justify-content: center;
  transform: perspective(30px) rotateX(4deg);
  width: 28px;
}

.brand-mark span {
  background: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent-strong), transparent 30%);
  border-radius: 50%;
  display: block;
  height: 7px;
}

.brand-mark span:nth-child(1) {
  width: 17px;
}

.brand-mark span:nth-child(2) {
  opacity: 0.82;
  width: 22px;
}

.brand-mark span:nth-child(3) {
  opacity: 0.62;
  width: 27px;
}

.header-actions {
  align-items: center;
  display: flex;
  gap: 8px;
}

.theme-toggle,
.github-link {
  align-items: center;
  background: color-mix(in srgb, var(--surface), transparent 18%);
  border: 1px solid var(--line);
  border-radius: 999px;
  display: inline-flex;
  font-size: 0.82rem;
  font-weight: 650;
  gap: 7px;
  min-height: 38px;
  padding: 7px 13px;
  text-decoration: none;
}

.theme-toggle:hover,
.github-link:hover {
  background: var(--surface);
  border-color: var(--line-strong);
}

.theme-icon {
  border: 1.5px solid currentColor;
  border-radius: 50%;
  display: block;
  height: 13px;
  position: relative;
  width: 13px;
}

.theme-icon::after {
  background: currentColor;
  border-radius: 50%;
  content: "";
  height: 7px;
  position: absolute;
  right: -2px;
  top: -2px;
  width: 7px;
}

.hero {
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--surface), transparent 3%), var(--surface)),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  display: grid;
  gap: 28px 48px;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  margin-top: 34px;
  overflow: hidden;
  padding: clamp(34px, 6vw, 72px);
  position: relative;
}

.hero::before {
  background: linear-gradient(90deg, var(--accent), var(--blue));
  content: "";
  height: 4px;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow {
  color: var(--accent-strong);
  font-size: 0.73rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(2.55rem, 6.4vw, 5rem);
  letter-spacing: -0.06em;
  line-height: 0.98;
  margin-bottom: 24px;
  max-width: 770px;
}

.hero-description {
  color: var(--text-soft);
  font-size: clamp(1rem, 1.8vw, 1.17rem);
  margin-bottom: 0;
  max-width: 680px;
}

.hero-visual {
  align-self: center;
  aspect-ratio: 1;
  margin: -10px auto;
  max-width: 300px;
  position: relative;
  width: 100%;
}

.orbit {
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  inset: 4%;
  position: absolute;
}

.orbit-two {
  inset: 18%;
}

.orbit-one::after,
.orbit-two::after {
  background: var(--accent);
  border: 4px solid var(--surface);
  border-radius: 50%;
  content: "";
  height: 9px;
  position: absolute;
  width: 9px;
}

.orbit-one::after {
  right: 13%;
  top: 13%;
}

.orbit-two::after {
  bottom: 4%;
  left: 23%;
}

.lake-layer {
  align-items: center;
  background: color-mix(in srgb, var(--surface-strong), var(--surface) 36%);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  display: flex;
  height: 58px;
  justify-content: center;
  left: 50%;
  position: absolute;
  transform: translateX(-50%);
}

.lake-layer span {
  font-size: 0.69rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.layer-one {
  top: 29%;
  width: 42%;
}

.layer-two {
  background: var(--accent-soft);
  color: var(--accent-strong);
  top: 45%;
  width: 61%;
}

.layer-three {
  top: 61%;
  width: 78%;
}

.ecosystem {
  align-items: center;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 28px;
  grid-column: 1 / -1;
  justify-content: space-between;
  padding-top: 22px;
}

.ecosystem > p {
  color: var(--text-faint);
  flex: 0 0 auto;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0;
  text-transform: uppercase;
}

.ecosystem-logos {
  display: grid;
  flex: 1;
  gap: 8px;
  grid-template-columns: repeat(4, minmax(90px, 1fr));
  margin: 0;
  max-width: 600px;
  padding: 0;
}

.ecosystem-logos li {
  align-items: center;
  background: #f8fbfa;
  border: 1px solid rgba(16, 35, 31, 0.1);
  border-radius: 11px;
  display: flex;
  height: 50px;
  justify-content: center;
  list-style: none;
  padding: 7px 13px;
}

.ecosystem-logos img {
  display: block;
  height: auto;
  max-height: 35px;
  max-width: 100%;
  object-fit: contain;
  width: auto;
}

.ecosystem-logos .logo-iceberg {
  height: 34px;
  width: 34px;
}

.ecosystem-logos .logo-delta {
  height: 34px;
  width: 34px;
}

.ecosystem-logos .logo-hudi {
  max-width: 76px;
}

.ecosystem-logos .logo-lance {
  max-width: 92px;
}

.stats {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 18px;
  grid-column: 1 / -1;
  grid-template-columns: repeat(4, 1fr);
  margin: 12px 0 0;
  padding-top: 26px;
}

.stat {
  min-width: 0;
}

.stat dt {
  color: var(--text-faint);
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.stat dd {
  font-size: 1.55rem;
  font-weight: 720;
  letter-spacing: -0.04em;
  margin: 1px 0 0;
}

.directory {
  padding: 110px 0 80px;
}

.section-heading {
  align-items: end;
  display: flex;
  gap: 30px;
  justify-content: space-between;
  margin-bottom: 30px;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  letter-spacing: -0.045em;
  line-height: 1.05;
  margin-bottom: 0;
}

.section-heading > p {
  color: var(--text-soft);
  margin-bottom: 3px;
  max-width: 390px;
}

.filter-panel {
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--surface), transparent 10%);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  display: grid;
  gap: 18px;
  padding: 18px;
  position: sticky;
  top: 14px;
  z-index: 10;
}

.search-field {
  align-items: center;
  background: var(--surface-soft);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  display: flex;
  gap: 11px;
  min-height: 52px;
  padding: 0 14px;
  transition: border-color 150ms ease, background-color 150ms ease;
}

.search-field:focus-within {
  background: var(--surface);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent), transparent 82%);
}

.search-icon {
  border: 1.8px solid var(--text-faint);
  border-radius: 50%;
  height: 15px;
  position: relative;
  width: 15px;
}

.search-icon::after {
  background: var(--text-faint);
  content: "";
  height: 1.8px;
  position: absolute;
  right: -5px;
  top: 12px;
  transform: rotate(45deg);
  width: 7px;
}

.search-field input {
  background: transparent;
  border: 0;
  flex: 1;
  min-width: 0;
  outline: 0;
}

.search-field input::placeholder {
  color: var(--text-faint);
}

kbd {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text-faint);
  font-size: 0.72rem;
  line-height: 1;
  padding: 5px 8px;
}

.type-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.type-filter {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 650;
  padding: 8px 13px;
}

.type-filter:hover {
  background: var(--surface-soft);
}

.type-filter[aria-pressed="true"] {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}

.type-filter .filter-count {
  opacity: 0.65;
}

.select-filters {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.select-filters label {
  display: grid;
  gap: 5px;
}

.select-filters label > span {
  color: var(--text-faint);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding-left: 2px;
  text-transform: uppercase;
}

.select-filters select {
  appearance: none;
  background:
    linear-gradient(45deg, transparent 50%, var(--text-soft) 50%) calc(100% - 18px) 50% / 5px 5px
      no-repeat,
    linear-gradient(135deg, var(--text-soft) 50%, transparent 50%) calc(100% - 13px) 50% /
      5px 5px no-repeat,
    var(--surface-soft);
  border: 1px solid transparent;
  border-radius: 10px;
  min-width: 0;
  outline: 0;
  padding: 10px 38px 10px 12px;
}

.select-filters select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent), transparent 82%);
}

.results-bar {
  align-items: center;
  display: flex;
  justify-content: space-between;
  min-height: 62px;
  padding: 12px 2px 8px;
}

.results-bar p {
  color: var(--text-soft);
  font-size: 0.87rem;
  font-weight: 620;
  margin: 0;
}

.clear-button {
  background: transparent;
  border: 0;
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 7px 0 7px 12px;
}

.resource-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.resource-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03);
  display: flex;
  flex-direction: column;
  min-height: 330px;
  overflow: hidden;
  padding: 23px;
  position: relative;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.resource-card::before {
  background: var(--accent);
  content: "";
  height: 3px;
  left: 22px;
  position: absolute;
  right: 22px;
  top: 0;
}

.resource-card[data-type="paper"]::before {
  background: var(--blue);
}

.resource-card[data-type="book"]::before {
  background: var(--violet);
}

.resource-card[data-type="code"]::before {
  background: var(--amber);
}

.resource-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--card-shadow);
  transform: translateY(-4px);
}

.card-meta {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 17px;
}

.type-badge,
.topic-label {
  font-size: 0.69rem;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.type-badge {
  background: var(--accent-soft);
  border-radius: 999px;
  color: var(--accent-strong);
  padding: 5px 8px;
  text-transform: uppercase;
}

[data-type="paper"] .type-badge {
  background: var(--blue-soft);
  color: var(--blue);
}

[data-type="book"] .type-badge {
  background: var(--violet-soft);
  color: var(--violet);
}

[data-type="code"] .type-badge {
  background: var(--amber-soft);
  color: var(--amber);
}

.topic-label {
  color: var(--text-faint);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.resource-card h3 {
  font-size: 1.18rem;
  letter-spacing: -0.025em;
  line-height: 1.28;
  margin-bottom: 12px;
}

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

.resource-card h3 a::after {
  content: "";
  inset: 0;
  position: absolute;
}

.resource-card h3 a:focus-visible {
  border-radius: 5px;
  outline: 3px solid color-mix(in srgb, var(--accent), transparent 45%);
  outline-offset: 4px;
}

.card-summary {
  color: var(--text-soft);
  display: -webkit-box;
  font-size: 0.87rem;
  line-height: 1.62;
  margin-bottom: 20px;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 5;
}

.card-footer {
  align-items: end;
  display: flex;
  gap: 10px;
  justify-content: space-between;
  margin-top: auto;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.tag-list li {
  background: var(--surface-soft);
  border-radius: 6px;
  color: var(--text-soft);
  font-size: 0.67rem;
  font-weight: 650;
  list-style: none;
  padding: 4px 7px;
}

.external-arrow {
  color: var(--text-faint);
  flex: 0 0 auto;
  font-size: 1.1rem;
  line-height: 1;
}

.empty-state {
  background: var(--surface);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  padding: 68px 24px;
  text-align: center;
}

.empty-state > span {
  color: var(--accent);
  font-size: 2.2rem;
}

.empty-state h3 {
  font-size: 1.25rem;
  margin: 8px 0 5px;
}

.empty-state p {
  color: var(--text-soft);
  margin-bottom: 18px;
}

.primary-button {
  background: var(--text);
  border: 0;
  border-radius: 999px;
  color: var(--bg);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 10px 16px;
}

footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--text-soft);
  display: flex;
  font-size: 0.82rem;
  justify-content: space-between;
  padding: 30px 0 42px;
}

footer p {
  margin: 0;
}

footer a {
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: none;
}

[hidden] {
  display: none !important;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr minmax(220px, 0.55fr);
    padding: 46px;
  }

  .resource-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .page-shell {
    padding: 0 18px;
  }

  .site-header {
    min-height: 68px;
  }

  .brand {
    font-size: 0.82rem;
  }

  .theme-label {
    display: none;
  }

  .hero {
    display: block;
    margin-top: 18px;
    padding: 36px 25px 28px;
  }

  h1 {
    font-size: clamp(2.45rem, 13vw, 3.65rem);
  }

  .hero-visual {
    display: none;
  }

  .ecosystem {
    align-items: stretch;
    display: block;
    margin-top: 28px;
    padding-top: 20px;
  }

  .ecosystem > p {
    margin-bottom: 10px;
  }

  .ecosystem-logos {
    gap: 7px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: none;
  }

  .ecosystem-logos li {
    height: 48px;
  }

  .stats {
    gap: 14px;
    grid-template-columns: repeat(2, 1fr);
    margin-top: 28px;
  }

  .stat dd {
    font-size: 1.35rem;
  }

  .directory {
    padding-top: 78px;
  }

  .section-heading {
    align-items: start;
    display: block;
  }

  .section-heading > p {
    margin-top: 15px;
  }

  .filter-panel {
    position: static;
  }

  .select-filters {
    grid-template-columns: 1fr;
  }

  .resource-grid {
    grid-template-columns: 1fr;
  }

  .resource-card {
    min-height: 290px;
  }

  footer {
    align-items: start;
    flex-direction: column;
    gap: 10px;
  }
}

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

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