:root {
  --c-primary: #2d5d8e;
  --c-primary-dark: #1c3f63;
  --c-primary-light: #4070b0;
  --c-accent: #e1ecf7;
  --c-accent-dark: #b8d1ea;
  --c-warning: #c0392b;
  --c-warning-bg: #fdecea;
  --c-text: #1f2330;
  --c-text-muted: #5a6275;
  --c-bg: #ffffff;
  --c-bg-soft: #f5f7fb;
  --c-border: #d6dbe5;

  --f-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.04);
  --shadow-md: 0 4px 10px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);

  --container: 1100px;
  --header-h: 64px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--c-primary-dark); }
h1, h2, h3, h4 { color: var(--c-primary); line-height: 1.25; margin-top: 0; }
h1 { font-size: clamp(1.7rem, 4vw + 0.5rem, 2.4rem); }
h2 { font-size: clamp(1.3rem, 2vw + 0.6rem, 1.7rem); }
h3 { font-size: 1.15rem; }
p, ul, ol { margin: 0 0 var(--space-4); }
ul, ol { padding-left: 1.25rem; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; border-top: 1px solid var(--c-border); margin: var(--space-6) 0; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--c-primary);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  z-index: 1000;
}
.skip-link:focus { left: var(--space-3); top: var(--space-3); }

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
  z-index: 100;
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--c-primary);
}
.brand-logo { width: 48px; height: 48px; flex: 0 0 auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-weight: 700; font-size: 1.05rem; }
.brand-tagline { font-size: 0.85rem; color: var(--c-text-muted); }

.nav-toggle {
  background: none;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  width: 44px; height: 44px;
  padding: 10px;
  cursor: pointer;
  display: flex; flex-direction: column; justify-content: space-between;
}
.nav-toggle-bar { display: block; height: 2px; background: var(--c-primary); border-radius: 2px; transition: transform .2s, opacity .2s; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(10px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }

.primary-nav {
  position: absolute;
  inset: 100% 0 auto 0;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
  display: none;
  box-shadow: var(--shadow-md);
}
.primary-nav.is-open { display: block; }
.nav-list { list-style: none; margin: 0; padding: var(--space-3) var(--space-4); max-width: var(--container); margin-inline: auto; }
.nav-item { position: relative; }
.nav-link {
  display: block;
  padding: var(--space-3) var(--space-2);
  text-decoration: none;
  color: var(--c-text);
  font-weight: 500;
  border-bottom: 1px solid var(--c-border);
}
.nav-item.is-active > .nav-link { color: var(--c-primary); font-weight: 700; }
.nav-item:last-child > .nav-link { border-bottom: 0; }
.nav-link[aria-current="page"] { color: var(--c-primary); }

.submenu-toggle {
  position: absolute;
  right: 0;
  top: 0;
  width: 44px; height: 44px;
  background: none;
  border: 0;
  color: var(--c-primary);
  font-size: 1.2rem;
  cursor: pointer;
}
.submenu {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--space-4);
  display: none;
  border-bottom: 1px solid var(--c-border);
}
.has-children.is-expanded .submenu { display: block; }
.has-children.is-expanded .submenu-toggle { transform: rotate(180deg); }
.submenu li a {
  display: block;
  padding: var(--space-2) var(--space-2);
  text-decoration: none;
  color: var(--c-text-muted);
}
.submenu li a:hover, .submenu li a[aria-current="page"] { color: var(--c-primary); }

@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .primary-nav { position: static; display: block; box-shadow: none; border: 0; background: transparent; }
  .nav-list { display: flex; gap: var(--space-2); padding: 0; }
  .nav-item { border: 0; }
  .nav-link { border: 0; padding: var(--space-3); border-radius: var(--radius); }
  .nav-link:hover { background: var(--c-accent); color: var(--c-primary); }
  .nav-item.is-active > .nav-link { background: var(--c-accent); }
  .submenu-toggle { display: none; }
  .has-children > .nav-link::after { content: " ▾"; font-size: 0.8em; color: var(--c-text-muted); }
  .submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--c-bg);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: var(--space-2);
    display: none;
    z-index: 110;
  }
  .has-children:hover > .submenu,
  .has-children:focus-within > .submenu,
  .has-children.is-expanded > .submenu { display: block; }
  .submenu li a { padding: var(--space-2) var(--space-3); border-radius: var(--radius); }
  .submenu li a:hover { background: var(--c-accent); }
}

/* --- Layout --- */
.container { max-width: var(--container); margin: 0 auto; padding: var(--space-5) var(--space-4); }
.container-narrow { max-width: 760px; margin: 0 auto; padding: var(--space-5) var(--space-4); }
section { margin-bottom: var(--space-7); }

/* --- Hero / Aktuelles --- */
.hero {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  color: #fff;
  padding: var(--space-7) var(--space-4);
}
.hero-inner { max-width: var(--container); margin: 0 auto; }
.hero h1 { color: #fff; }
.hero p { color: rgba(255,255,255,.92); margin-bottom: var(--space-4); }
.hero .btn { background: #fff; color: var(--c-primary); }
.hero .btn:hover { background: var(--c-accent); }

.aktuelles {
  background: var(--c-warning-bg);
  border-left: 4px solid var(--c-warning);
  border-radius: var(--radius);
  padding: var(--space-5);
  margin: var(--space-6) 0;
}
.aktuelles h2 { color: var(--c-warning); margin-bottom: var(--space-2); }
.aktuelles .aktuelles-date { font-weight: 700; color: var(--c-warning); margin-bottom: var(--space-3); }

/* --- Cards & Boxes --- */
.card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}
.box-info {
  background: var(--c-accent);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.box-info h2 { color: var(--c-primary-dark); }

.btn {
  display: inline-block;
  padding: var(--space-3) var(--space-5);
  background: var(--c-primary);
  color: #fff;
  border: 0;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background .15s;
}
.btn:hover { background: var(--c-primary-dark); color: #fff; }
.btn-outline { background: transparent; color: var(--c-primary); border: 2px solid var(--c-primary); padding: calc(var(--space-3) - 2px) calc(var(--space-5) - 2px); }
.btn-outline:hover { background: var(--c-primary); color: #fff; }

/* --- Home: two-column layout --- */
.home-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  .home-grid { grid-template-columns: 2fr 1fr; }
}

/* --- Bildergalerie --- */
.galerie {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 600px) { .galerie { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 900px) { .galerie { grid-template-columns: repeat(4, 1fr); } }
.galerie a {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--c-bg-soft);
}
.galerie img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .3s;
}
.galerie a:hover img, .galerie a:focus-visible img { transform: scale(1.05); }

/* --- Sponsoren-Grid --- */
.sponsoren-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}
@media (min-width: 600px) { .sponsoren-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .sponsoren-grid { grid-template-columns: repeat(3, 1fr); } }
.sponsor-card {
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.sponsor-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100px;
  margin-bottom: var(--space-4);
}
.sponsor-logo img { max-height: 100px; width: auto; object-fit: contain; }
.sponsor-card h3 { margin-bottom: var(--space-2); }
.sponsor-meta { font-size: 0.92rem; color: var(--c-text-muted); }
.sponsor-meta a { color: var(--c-text-muted); }

/* --- Vorstand-Tabelle --- */
.vorstand-table {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.vorstand-table tr { display: grid; grid-template-columns: 1fr; padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--c-border); }
.vorstand-table tr:last-child { border-bottom: 0; }
.vorstand-table tr:nth-child(odd) { background: var(--c-bg-soft); }
.vorstand-table th, .vorstand-table td { text-align: left; padding: 0; }
.vorstand-table th { color: var(--c-text-muted); font-weight: 500; font-size: 0.9rem; }
@media (min-width: 600px) {
  .vorstand-table tr { grid-template-columns: 1fr 1fr; gap: var(--space-4); }
  .vorstand-table th { font-size: 1rem; }
}

/* --- Dokumente-Liste --- */
.docs-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.docs-list a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--c-text);
  transition: border-color .15s, background .15s;
}
.docs-list a:hover { border-color: var(--c-primary); background: var(--c-bg-soft); }
.docs-list a::before { content: "📄"; font-size: 1.4rem; }

/* --- Formular --- */
.kontakt-form {
  display: grid;
  gap: var(--space-4);
  max-width: 560px;
}
.kontakt-form label { font-weight: 600; display: block; margin-bottom: var(--space-2); }
.kontakt-form input,
.kontakt-form textarea {
  width: 100%;
  padding: var(--space-3);
  font: inherit;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-bg);
}
.kontakt-form input:focus,
.kontakt-form textarea:focus {
  outline: 2px solid var(--c-primary);
  outline-offset: 1px;
  border-color: var(--c-primary);
}
.kontakt-form textarea { min-height: 160px; resize: vertical; }
.kontakt-form .form-row { display: grid; gap: var(--space-4); }
@media (min-width: 600px) { .kontakt-form .form-row { grid-template-columns: 1fr 1fr; } }
.kontakt-form .honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; }
.alert { padding: var(--space-4); border-radius: var(--radius); margin-bottom: var(--space-4); }
.alert-ok { background: #e8f6ee; border-left: 4px solid #2e8b57; color: #1e5b3a; }
.alert-err { background: var(--c-warning-bg); border-left: 4px solid var(--c-warning); color: var(--c-warning); }

/* --- Footer --- */
.site-footer {
  background: var(--c-primary-dark);
  color: #d6dbe5;
  margin-top: var(--space-8);
}
.site-footer h2 { color: #fff; font-size: 1rem; margin-bottom: var(--space-3); }
.site-footer a { color: #d6dbe5; }
.site-footer a:hover { color: #fff; }
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-7) var(--space-4) var(--space-5);
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) { .footer-inner { grid-template-columns: 2fr 1fr 1fr; } }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: var(--space-2); }
.footer-copy { max-width: var(--container); margin: 0 auto; padding: 0 var(--space-4) var(--space-4); font-size: 0.85rem; color: rgba(255,255,255,.6); }

/* --- Lightbox --- */
.lightbox {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-4);
}
.lightbox.is-open { display: flex; }
.lightbox img { max-width: 95vw; max-height: 90vh; object-fit: contain; }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute;
  background: rgba(255,255,255,.1);
  color: #fff;
  border: 0;
  width: 48px; height: 48px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.lightbox-close { top: var(--space-4); right: var(--space-4); }
.lightbox-prev { left: var(--space-4); top: 50%; transform: translateY(-50%); }
.lightbox-next { right: var(--space-4); top: 50%; transform: translateY(-50%); }
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,.25); }

/* --- Utilities --- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.lead { font-size: 1.1rem; color: var(--c-text-muted); }