:root {
  --ink: #101020;
  --muted: #23485f;
  --paper: #ffffff;
  --panel: #aee1f5;
  --blue-panel: #aee1f5;
  --blue-panel-soft: #d9f2fb;
  --line: #ffffff;
  --leaf: #008000;
  --leaf-dark: #006800;
  --sky: #3399ff;
  --link: #0000ff;
  --link-visited: #0000aa;
  --hover: #b0b0b0;
  --shell: 910px;
  --shadow: 0 8px 20px rgba(0, 43, 90, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper) url("css-images/background.gif") repeat center top;
  background-attachment: fixed;
  font-family: Tahoma, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

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

a {
  color: var(--link);
  text-decoration: none;
}

a:visited {
  color: var(--link-visited);
}

a:hover,
a:focus-visible {
  color: var(--hover);
}

.site-header {
  position: relative;
  z-index: 20;
  width: min(var(--shell), calc(100% - 24px));
  min-height: 264px;
  margin: 0 auto 10px;
  padding-top: 213px;
  background: #ffffff url("css-images/banner_voegel.png") no-repeat center top / 100% auto;
  border: 1px solid #ffffff;
  border-top: 0;
}

.brand {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: #ffffff;
  background: var(--sky);
  border: 1px solid #ffffff;
  border-radius: 3px;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 2px 14px;
  width: 100%;
  margin: 0;
  padding: 8px 10px;
  background: var(--blue-panel);
}

.site-nav a {
  min-height: auto;
  padding: 3px 0;
  color: var(--link);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--hover);
  outline: none;
}

.site-nav a[aria-current="page"] {
  color: var(--link-visited);
  text-decoration: underline;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #ffffff;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  width: min(var(--shell), calc(100% - 24px));
  min-height: auto;
  margin: 0 auto 10px;
  display: flex;
  align-items: flex-start;
  padding: 18px;
  color: var(--ink);
  background: var(--blue-panel);
  border: 1px solid var(--line);
}

.hero-copy {
  width: min(620px, 100%);
  padding: 0;
  background: transparent;
  border: 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--leaf);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--leaf);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.12;
}

h1 {
  max-width: 12em;
  color: var(--leaf);
  font-size: 1.8rem;
}

h2 {
  color: var(--leaf);
  font-size: 1.45rem;
}

h3 {
  color: var(--leaf);
  font-size: 1.12rem;
}

.hero-copy p:not(.eyebrow) {
  max-width: 42rem;
  margin-bottom: 0;
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  color: #ffffff;
  background: var(--link-visited);
}

.button.secondary {
  color: var(--link);
  background: #ffffff;
  border-color: #ffffff;
}

.section {
  width: min(var(--shell), calc(100% - 24px));
  margin: 0 auto 10px;
  padding: 18px;
  background: var(--blue-panel);
  border: 1px solid var(--line);
}

.band {
  width: min(var(--shell), calc(100% - 24px));
  max-width: var(--shell);
  padding-right: 18px;
  padding-left: 18px;
  background: var(--blue-panel);
}

.section-heading {
  margin-bottom: 16px;
}

.species-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.species-card,
.text-panel,
.mutation-group,
.contact-grid {
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid #ffffff;
  border-radius: 3px;
  box-shadow: none;
}

.species-card {
  overflow: hidden;
}

.species-card-link {
  display: block;
  height: 100%;
  color: inherit;
  text-decoration: none;
}

.species-card-link:visited {
  color: inherit;
}

.species-card-link:hover h3,
.species-card-link:focus-visible h3 {
  color: var(--hover);
}

.species-card-link:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

.species-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.species-card div {
  padding: 10px;
}

.species-card p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.tab {
  min-height: 34px;
  padding: 6px 10px;
  color: var(--link);
  background: #ffffff;
  border: 1px solid #ffffff;
  border-radius: 3px;
  font: inherit;
  cursor: pointer;
}

.tab[aria-selected="true"] {
  color: #ffffff;
  background: var(--link-visited);
  border-color: var(--link-visited);
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.photo-button {
  width: 100%;
  padding: 0;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid #ffffff;
  border-radius: 3px;
  cursor: pointer;
}

.photo-button img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  transition: transform 160ms ease;
}

.photo-button:hover img,
.photo-button:focus-visible img {
  transform: scale(1.04);
}

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

.mutation-group {
  padding: 12px;
}

.mutation-group h3 {
  margin-bottom: 12px;
}

.mutation-photos {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
}

.info-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.info-layout .section-heading {
  grid-column: 1 / -1;
}

.vererbung-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: 12px;
}

.rule-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.rule-tile {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 92px;
  padding: 12px;
  color: var(--ink);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid #ffffff;
  border-radius: 3px;
}

.rule-tile strong {
  color: var(--leaf);
  font-size: 1rem;
}

.rule-tile span {
  color: var(--muted);
  font-size: 0.92rem;
}

.rule-tile:hover,
.rule-tile:focus-visible {
  color: var(--ink);
  background: #ffffff;
}

.rule-tile:hover strong,
.rule-tile:focus-visible strong {
  color: var(--hover);
}

.text-panel {
  padding: 14px;
}

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

.panel-link {
  display: block;
  margin-top: 12px;
  padding: 14px 16px;
  color: inherit;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid #ffffff;
  border-radius: 3px;
  box-shadow: inset 0 0 0 1px rgba(51, 153, 255, 0.18);
}

.panel-link p {
  margin-bottom: 0;
}

.panel-lead {
  margin-top: 0;
  margin-bottom: 8px;
  color: var(--leaf);
  font-size: 1rem;
  font-weight: 700;
}

.panel-link:hover p,
.panel-link:focus-visible p {
  color: var(--hover);
  text-decoration: underline;
}

.panel-link:hover,
.panel-link:focus-visible {
  background: #ffffff;
  box-shadow: inset 0 0 0 1px rgba(51, 153, 255, 0.38);
  outline: none;
}

.link-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.link-list li {
  padding-left: 14px;
  border-left: 3px solid var(--link);
}

.link-list a {
  color: var(--link);
  text-decoration: none;
}

.link-list a:hover,
.link-list a:focus-visible {
  color: var(--hover);
  text-decoration: underline;
}

.contact-section {
  padding-bottom: 18px;
}

.contact-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px;
}

.contact-name {
  margin-top: 0;
  font-weight: 700;
}

.site-footer {
  width: min(var(--shell), calc(100% - 24px));
  min-height: auto;
  margin: 0 auto 24px;
  padding: 8px 10px;
  color: var(--link-visited);
  font-size: 0.86rem;
  background: var(--blue-panel);
  border: 1px solid #ffffff;
}

.site-footer p {
  margin: 0 auto;
  width: min(var(--shell), 100%);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin: 0;
}

.footer-links a {
  color: var(--link);
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--hover);
  text-decoration: underline;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  grid-template-columns: minmax(44px, 1fr) minmax(0, auto) minmax(44px, 1fr);
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 10px;
  padding: 52px 20px 24px;
  background: rgba(12, 18, 14, 0.9);
}

.lightbox[hidden] {
  display: none;
}

.lightbox img {
  grid-column: 2;
  grid-row: 1;
  max-width: min(1100px, 96vw);
  max-height: 82vh;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.lightbox p {
  grid-column: 1 / -1;
  grid-row: 2;
  margin: 12px 0 0;
  color: #fff;
}

.lightbox-nav {
  align-self: center;
  justify-self: center;
  width: 44px;
  height: 44px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.lightbox-prev {
  grid-column: 1;
  grid-row: 1;
}

.lightbox-next {
  grid-column: 3;
  grid-row: 1;
}

.lightbox-nav:disabled {
  opacity: 0.25;
  cursor: default;
}

.lightbox-close {
  position: fixed;
  top: 16px;
  right: 18px;
  width: 44px;
  height: 44px;
  color: #fff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
}

.empty-state {
  grid-column: 1 / -1;
  padding: 24px;
  color: var(--muted);
  background: #ffffff;
  border: 1px solid #ffffff;
  border-radius: 8px;
}

.legacy-page {
  display: grid;
  grid-template-columns: 20% minmax(0, 1fr);
  gap: 18px;
  width: min(var(--shell), calc(100% - 24px));
  margin: 0 auto 10px;
  padding: 18px;
  background: var(--blue-panel);
  border: 1px solid #ffffff;
}

.legacy-sidebar {
  position: sticky;
  top: 12px;
  align-self: start;
  display: grid;
  gap: 6px;
}

.legacy-sidebar a {
  display: block;
  padding: 7px 8px;
  color: var(--link);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid #ffffff;
  border-radius: 3px;
}

.legacy-sidebar a:hover,
.legacy-sidebar a:focus-visible,
.legacy-sidebar a[aria-current="page"] {
  color: #ffffff;
  background: var(--link-visited);
  border-color: var(--link-visited);
}

.legacy-content {
  min-width: 0;
  padding: 10px;
  background: transparent;
  border: 1px solid #ffffff;
  border-radius: 3px;
  overflow-x: auto;
}

.legacy-content h1 {
  margin-bottom: 16px;
  color: var(--leaf);
  font-size: 1.45rem;
}

.legacy-content h3 {
  margin-top: 24px;
  margin-bottom: 10px;
}

.legacy-content h2 {
  margin-top: 28px;
  margin-bottom: 12px;
}

.legacy-content table {
  width: 100%;
  margin: 14px 0 24px;
  border-collapse: collapse;
  table-layout: auto;
  background: #aee1f5;
}

.legacy-content th,
.legacy-content td {
  padding: 8px 10px;
  border: 1px solid #ffffff;
  vertical-align: top;
  overflow-wrap: anywhere;
  line-height: 1.35;
}

.legacy-content th {
  background: #5599ff;
  color: #ffffff;
  text-align: left;
  font-weight: 700;
}

.legacy-content tbody tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.22);
}

.legacy-content tbody tr:hover td {
  background: rgba(255, 255, 255, 0.34);
}

.legacy-center {
  text-align: center;
}

.legacy-accent {
  color: #c00000;
}

.legacy-content .breadcrumb {
  margin-top: 0;
  color: var(--muted);
}

.legacy-callout {
  margin: 14px 0 24px;
  padding: 14px 16px;
  background: #aee1f5;
  border: 1px solid #ffffff;
}

.legacy-index {
  min-height: auto;
}

.legacy-index-list {
  margin: 0;
  padding-left: 22px;
  font-size: 1.05rem;
}

.legacy-index-list li {
  margin: 7px 0;
}

.content-media-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0 4px;
}

.content-media {
  margin: 0;
  padding: 8px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid #ffffff;
  border-radius: 3px;
}

.content-media img {
  width: 100%;
  height: auto;
}

.content-media figcaption {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 920px) {
  .site-header {
    min-height: calc(clamp(150px, 23.5vw, 213px) + 51px);
    padding-top: clamp(150px, 23.5vw, 213px);
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: clamp(150px, 23.5vw, 213px);
    right: 12px;
    left: 12px;
    width: auto;
    margin: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav.static-nav {
    position: static;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
    width: 100%;
    margin: 0;
    padding: 8px 10px;
    background: var(--blue-panel);
    box-shadow: none;
  }

  h1 {
    font-size: 1.65rem;
  }

  .species-grid,
  .photo-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .mutation-grid,
  .info-layout,
  .vererbung-layout,
  .legacy-page {
    grid-template-columns: 1fr;
  }

  .legacy-sidebar {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .hero {
    padding: 14px;
  }

  h1 {
    font-size: 1.45rem;
  }

  h2 {
    font-size: 1.3rem;
  }

  .section {
    width: min(100% - 20px, var(--shell));
    padding: 14px;
  }

  .band {
    width: min(100% - 20px, var(--shell));
    padding-right: 14px;
    padding-left: 14px;
  }

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

  .mutation-photos {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .contact-grid {
    align-items: flex-start;
    flex-direction: column;
  }

  .link-list {
    grid-template-columns: 1fr;
  }

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

  .legacy-page {
    width: min(100% - 20px, var(--shell));
    padding: 14px;
  }

  .legacy-sidebar {
    grid-template-columns: 1fr;
  }

  .legacy-content {
    padding: 18px;
  }
}