:root {
  --bg: #f7f8f3;
  --surface: #ffffff;
  --surface-muted: #edf1e9;
  --ink: #1e2722;
  --muted: #5e6a62;
  --line: #d8ded5;
  --green: #426b49;
  --green-dark: #284532;
  --blue: #315b72;
  --gold: #a37324;
  --shadow: 0 18px 55px rgba(28, 42, 34, 0.1);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  color: var(--ink);
  background: var(--bg);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

body {
  margin: 0;
}

a {
  color: inherit;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 4vw, 48px);
  background: rgba(247, 248, 243, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  color: var(--green-dark);
  font-size: 1.05rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.site-nav a {
  min-height: 38px;
  padding: 9px 12px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 650;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--green-dark);
  background: var(--surface-muted);
}

main {
  min-height: calc(100vh - 150px);
}

.scientific-name {
  font-style: italic;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.85fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(28px, 5vw, 64px) 0 44px;
}

.hero--solo {
  grid-template-columns: minmax(0, 1120px);
  padding-bottom: 24px;
}

.hero h1,
.page-header h1,
.detail-hero h1 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.85rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero.hero--solo h1 {
  max-width: 1120px;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.12;
}

.page-header h1 {
  max-width: 1120px;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.12;
}

.hero.hero--solo p {
  max-width: 1080px;
}

.hero p,
.page-header p,
.detail-hero p {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.09rem;
}

.hero__visual {
  display: grid;
  grid-template-columns: 1fr 0.75fr;
  grid-template-rows: 190px 190px;
  gap: 12px;
}

.hero__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero__visual img:first-child {
  grid-row: span 2;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.tool-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 560px;
}

.tool-actions .button:first-child {
  grid-column: 1 / -1;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid var(--green-dark);
  border-radius: 6px;
  background: var(--green-dark);
  color: #ffffff;
  font-weight: 750;
  text-decoration: none;
}

.button--secondary {
  background: transparent;
  color: var(--green-dark);
}

.button--disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.stats-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  border: 1px solid var(--line);
  background: var(--surface);
}

.stats-band div {
  padding: 22px;
  border-right: 1px solid var(--line);
}

.stats-band div:last-child {
  border-right: 0;
}

.stats-band strong {
  display: block;
  color: var(--green-dark);
  font-size: 2rem;
  line-height: 1;
}

.stats-band span {
  color: var(--muted);
  font-weight: 650;
}

.section,
.page-header,
.detail-hero {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
}

.section {
  padding: 48px 0;
}

.section--tight {
  padding-top: 22px;
}

.section--tools {
  padding: 48px 0;
}

.how-it-works {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.page-header {
  padding: 58px 0 26px;
}

.section-heading {
  margin-bottom: 22px;
}

.section-heading .stats-band {
  width: 100%;
  margin: 18px 0 22px;
}

.how-it-works .section-heading {
  max-width: 1120px;
}

.how-it-works__content {
  max-width: 1080px;
}

.section-heading h2,
.split-panel h2,
.info-panel h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.35rem);
  line-height: 1.08;
}

.dataset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.dataset-grid--featured {
  grid-template-columns: repeat(3, 1fr);
}

.dataset-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 12px 30px rgba(28, 42, 34, 0.06);
}

.dataset-card__image,
.dataset-card__image-pair {
  display: grid;
  aspect-ratio: 1.7;
  background: var(--surface-muted);
}

.dataset-card__image-pair {
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  text-decoration: none;
}

.dataset-card__image-pair span {
  position: relative;
  min-width: 0;
  overflow: hidden;
  background: var(--surface-muted);
}

.dataset-card__image img,
.dataset-card__image-pair img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.dataset-card__image-pair small {
  position: absolute;
  left: 8px;
  bottom: 8px;
  padding: 4px 7px;
  border-radius: 999px;
  background: rgba(247, 248, 243, 0.9);
  color: var(--green-dark);
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
}

.dataset-card__body {
  padding: 18px;
}

.dataset-card h3 {
  margin: 0 0 18px;
  font-size: 1.08rem;
  line-height: 1.18;
}

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

.dataset-card h3 a:hover {
  color: var(--green);
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}

.card-actions .button {
  min-height: 38px;
  padding: 9px 10px;
  font-size: 0.82rem;
  white-space: nowrap;
}

.compact-meta,
.metadata-grid {
  display: grid;
  gap: 10px;
  margin: 0;
}

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

.compact-meta div:first-child {
  grid-column: 1 / -1;
}

.compact-meta div,
.metadata-grid div {
  min-width: 0;
}

dt {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

dd {
  margin: 2px 0 0;
  overflow-wrap: anywhere;
  font-weight: 650;
}

.tag-row {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.tag-row--wrap {
  flex-wrap: wrap;
}

.tag-row span {
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
}

.split-panel,
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(24px, 5vw, 70px);
  align-items: start;
}

.split-panel {
  border-top: 1px solid var(--line);
}

.split-panel p,
.body-copy {
  margin-top: 0;
  color: var(--muted);
  font-size: 1.04rem;
}

.catalog-toolbar {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) 220px 180px;
  gap: 14px;
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.catalog-toolbar label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

input,
select {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  color: var(--ink);
  font: inherit;
}

input:focus,
select:focus {
  outline: 3px solid rgba(66, 107, 73, 0.16);
  border-color: var(--green);
}

.catalog-summary {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--muted);
}

.catalog-summary strong {
  color: var(--ink);
}

.notice {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--muted);
}

.detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(24px, 5vw, 62px);
  align-items: center;
  padding: 46px 0 34px;
}

.detail-hero__image,
.detail-hero__image-pair {
  margin: 0;
}

.detail-hero__image-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-muted);
  box-shadow: var(--shadow);
}

.detail-hero__image-pair span {
  position: relative;
  min-width: 0;
  aspect-ratio: 1.15;
}

.detail-hero__image img,
.detail-hero__image-pair img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-hero__image img {
  aspect-ratio: 1.45;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.detail-hero__image-pair small {
  position: absolute;
  left: 10px;
  bottom: 10px;
  padding: 5px 9px;
  border-radius: 999px;
  background: rgba(247, 248, 243, 0.9);
  color: var(--green-dark);
  font-size: 0.7rem;
  font-weight: 850;
  text-transform: uppercase;
}

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--green-dark);
  font-weight: 800;
  text-decoration: none;
}

.metadata-grid {
  grid-template-columns: repeat(3, 1fr);
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.metadata-grid div {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.source-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
}

.source-list div {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.class-list,
.workflow-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.class-list li,
.workflow-list li {
  margin-bottom: 10px;
}

.submission-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.submission-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 750;
}

.submission-form span {
  font-size: 0.82rem;
  text-transform: uppercase;
}

.submission-form span em {
  color: var(--gold);
  font-style: normal;
  text-transform: none;
}

.submission-form__note,
.submission-form__section {
  grid-column: 1 / -1;
}

.submission-form__note {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-muted);
  color: var(--muted);
}

.submission-form__section {
  margin-top: 6px;
  color: var(--gold);
  font-size: 0.82rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.submission-form input,
.submission-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 13px;
  background: #ffffff;
  color: var(--ink);
  font: inherit;
}

.submission-form input:focus,
.submission-form textarea:focus {
  border-color: var(--green-dark);
  outline: 2px solid rgba(37, 76, 52, 0.14);
}

.submission-form__wide,
.submission-form__actions {
  grid-column: 1 / -1;
}

.submission-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.option-grid article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.option-grid h3 {
  margin: 0 0 10px;
  font-size: 1.12rem;
}

.option-grid p {
  margin: 0;
  color: var(--muted);
}

.info-panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.info-panel p {
  color: var(--muted);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.credit-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  font-weight: 650;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(18px, 4vw, 48px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-weight: 650;
}

.site-footer__brand,
.site-footer__year {
  flex: 0 0 auto;
}

.site-footer__note {
  max-width: 820px;
  font-size: 0.86rem;
  font-weight: 550;
  text-align: center;
}

.site-footer__note a {
  color: var(--green-dark);
  font-weight: 750;
  text-decoration: none;
}

.site-footer__note a:hover {
  text-decoration: underline;
}

@media (max-width: 900px) {
  .hero,
  .detail-hero,
  .split-panel,
  .two-column,
  .catalog-toolbar {
    grid-template-columns: 1fr;
  }

  .dataset-grid--featured {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }

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

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

  .submission-form {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer__note {
    text-align: left;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero__visual {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(3, 150px);
  }

  .hero__visual img:first-child {
    grid-row: auto;
  }

  .stats-band,
  .metadata-grid,
  .compact-meta {
    grid-template-columns: 1fr;
  }

  .stats-band div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stats-band div:last-child {
    border-bottom: 0;
  }

  .tool-actions {
    grid-template-columns: 1fr;
  }

  .hero h1,
  .page-header h1,
  .detail-hero h1 {
    font-size: 2.15rem;
  }
}