:root {
  --color-old-blue: #6f93e7;
  --color-primary: #4f74c6;
  --color-primary-dark: #1e4bb4;
  --color-heading: #1e4bb4;
  --color-text: #2a455d;
  --color-background: #ffffff;
  --color-surface: #ffffff;
  --color-muted: #eef2f8;
  --color-border: #c8d4e6;
  --content-width: 66rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-background);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}

a {
  color: var(--color-primary-dark);
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.16em;
}

a:hover {
  color: #123b91;
}

:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
  box-shadow: 0 0 0 5px #1e4bb4;
}

.skip-link {
  position: absolute;
  z-index: 20;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.55rem 0.8rem;
  color: #162938;
  background: #fff5ca;
  transform: translateY(-200%);
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  background: var(--color-background);
}

.header-inner,
.page-content,
.footer-inner {
  width: min(100% - 2rem, var(--content-width));
  margin-inline: auto;
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding-top: 0.75rem;
}

/* Der verlinkte Bildstreifen verwendet die lokal bereitgestellten Headerbilder. */
.brand {
  display: block;
  grid-column: 1 / -1;
  width: 100%;
  height: 10.3rem;
  background: url('../images/Header-Startseite-1200x225.jpg') center / contain no-repeat;
  text-decoration: none;
}

body.page-neuer-chor .brand {
  background-image: url('../images/Header-Neuer-Chor-1200x225.jpg');
}

body.page-maennerchor .brand {
  background-image: url('../images/Header-Maennerchor-1200x225.jpg');
}

.menu-button {
  display: none;
}

.primary-nav {
  grid-column: 1 / -1;
  width: 100vw;
  margin-top: 0.75rem;
  margin-left: calc(50% - 50vw);
  background: var(--color-primary);
}

.primary-nav ul,
.footer-links,
.link-list,
.timeline,
.contact-list {
  padding: 0;
  margin: 0;
  list-style: none;
}

.primary-nav > ul {
  display: flex;
  width: min(100% - 2rem, var(--content-width));
  margin-inline: auto;
}

.primary-nav a,
.choir-menu summary {
  display: block;
  padding: 0.8rem 1rem;
  color: #ffffff;
  font-size: 1.02rem;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.primary-nav a[aria-current='page'],
.primary-nav a.nav-section-current,
.primary-nav a:hover,
.choir-menu summary:hover,
.choir-menu[open] summary,
.choir-menu-current summary {
  background: var(--color-primary-dark);
}

.choir-menu {
  position: relative;
}

.choir-menu summary {
  cursor: pointer;
  list-style: none;
}

.choir-menu summary::-webkit-details-marker {
  display: none;
}

.choir-menu summary::after {
  margin-left: 0.45rem;
  content: '⌄';
}

.choir-menu ul {
  position: absolute;
  z-index: 10;
  top: 100%;
  left: 0;
  min-width: 13rem;
  padding-block: 0.2rem;
  background: var(--color-primary);
  border: 1px solid #3d60aa;
}

.choir-menu ul a {
  padding: 0.65rem 0.9rem;
  font-size: 0.94rem;
  letter-spacing: 0;
}

.hero {
  background: var(--color-background);
}

.hero-inner {
  width: min(100% - 2rem, var(--content-width));
  padding: 2.7rem 0 1rem;
  margin-inline: auto;
}

.hero h1,
.page-title h1 {
  margin: 0 0 1rem;
  color: var(--color-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.25rem);
  font-weight: 700;
  line-height: 1.22;
}

.hero p {
  max-width: 48rem;
  margin: 0;
}

.page-title {
  padding: 2.4rem 0 0.4rem;
  background: var(--color-background);
}

.page-title > div {
  width: min(100% - 2rem, var(--content-width));
  margin-inline: auto;
}

.page-title p {
  max-width: 48rem;
  margin: 0;
}

.page-content {
  padding: 1.4rem 0 3.5rem;
}

.section {
  margin-top: 2.5rem;
}

.section:first-child {
  margin-top: 0;
}

h2,
h3 {
  color: var(--color-heading);
  line-height: 1.25;
}

h2 {
  margin: 0 0 0.8rem;
  font-size: 1.65rem;
}

h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
}

.intro {
  max-width: 48rem;
  margin: 0;
  font-size: 1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

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

.card,
.notice,
.placeholder-data {
  padding: 0;
  background: transparent;
  box-shadow: none;
}

.card {
  border: 0;
}

.card:not(:last-child) {
  border-right: 1px solid var(--color-border);
  padding-right: 1.5rem;
}

.card p:last-child,
.notice p:last-child {
  margin-bottom: 0;
}

.notice {
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--color-primary);
  background: var(--color-muted);
}

.notice strong {
  color: var(--color-heading);
}

.placeholder-data {
  padding: 1.2rem;
  border: 1px solid var(--color-border);
  background: #fbfcff;
}

.placeholder-data > :first-child {
  margin-top: 0;
}

.choir-photo {
  margin: 0;
}

.choir-photo img {
  display: block;
  width: 100%;
  max-width: 40.625rem;
  height: auto;
  margin-inline: auto;
}

.choir-photo figcaption {
  margin-top: 0.45rem;
  font-size: 0.9rem;
}

.repertoire-list {
  padding-left: 1.25rem;
  margin: 0;
}

.repertoire-list > li {
  margin-bottom: 1rem;
}

.repertoire-list p {
  margin: 0.1rem 0 0;
}

.external-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 0.2rem;
  font-size: 0.95rem;
}

.partner-logos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2rem;
  align-items: center;
  max-width: 42rem;
}

.partner-logos img {
  display: block;
  width: 100%;
  max-width: 17rem;
  height: auto;
}

.chronicle-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--color-border);
}

.chronicle-table th,
.chronicle-table td {
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.chronicle-table th {
  color: var(--color-heading);
  background: var(--color-muted);
}

.event-schedule {
  max-width: 44rem;
  margin: 0;
  border-top: 1px solid var(--color-border);
}

.event-schedule > div {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--color-border);
}

.event-schedule dt {
  color: var(--color-heading);
  font-weight: 700;
}

.event-schedule dd {
  margin: 0;
}

.event-flyers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  max-width: 52rem;
}

.event-flyers figure {
  margin: 0;
}

.event-flyers img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
}

.event-flyers figcaption {
  margin-top: 0.45rem;
  font-size: 0.9rem;
}

.button-link {
  display: inline-block;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--color-primary-dark);
  color: var(--color-primary-dark);
  background: var(--color-background);
  font-weight: 700;
  text-decoration: none;
}

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

.link-list li,
.contact-list li {
  padding-block: 0.45rem;
  border-bottom: 1px solid var(--color-border);
}

.timeline {
  border-left: 2px solid var(--color-primary);
}

.timeline li {
  position: relative;
  padding: 0 0 1.4rem 1.3rem;
}

.timeline li::before {
  position: absolute;
  top: 0.4rem;
  left: -0.42rem;
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: var(--color-primary-dark);
  content: '';
}

.timeline time {
  display: block;
  color: var(--color-heading);
  font-weight: 700;
}

.site-footer {
  padding-block: 1.35rem;
  color: #ffffff;
  background: var(--color-primary);
}

.footer-inner {
  display: flex;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: center;
}

.site-footer p {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.site-footer a {
  color: #ffffff;
}

@media (max-width: 48rem) {
  .header-inner {
    padding-top: 0.5rem;
  }

  .brand {
    grid-row: 1;
    height: auto;
    aspect-ratio: 16 / 3;
    margin-bottom: 0.5rem;
  }

  .header-inner::before {
    grid-column: 1 / -1;
    grid-row: 2;
    align-self: stretch;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    background: var(--color-primary);
    content: '';
  }

  .menu-button {
    z-index: 1;
    display: block;
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: end;
    min-height: 2.75rem;
    margin-block: 0.45rem;
    padding: 0.55rem 0.9rem;
    border: 1px solid #ffffff;
    color: #ffffff;
    background: var(--color-primary-dark);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
  }

  .primary-nav {
    grid-row: 3;
    display: none;
    margin-top: 0;
  }

  .primary-nav.is-open {
    display: block;
  }

  .primary-nav > ul {
    display: block;
    width: min(100% - 2rem, var(--content-width));
  }

  .primary-nav a,
  .choir-menu summary {
    padding: 0.7rem 0.4rem;
    border-bottom: 1px solid rgb(255 255 255 / 35%);
  }

  .choir-menu ul {
    position: static;
    border: 0;
    padding-left: 1rem;
  }

  .hero-inner {
    padding-top: 2rem;
  }

  .grid,
  .grid.two-columns {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .partner-logos {
    grid-template-columns: 1fr;
  }

  .chronicle-table {
    font-size: 0.92rem;
  }

  .event-schedule > div,
  .event-flyers {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .event-flyers {
    gap: 1.5rem;
  }

  .card:not(:last-child) {
    padding: 0 0 1.2rem;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .footer-inner {
    display: block;
  }

  .footer-links {
    margin-top: 0.65rem;
  }
}