:root {
  --brand-primary: #00597C;
  --brand-secondary: #3F2672;
  --brand-white: #FFFFFF;

  --bs-primary: var(--brand-primary);
  --bs-link-color: var(--brand-primary);
  --bs-link-hover-color: #0699cf;

  /* Fallback-Werte (Light) – werden von data-theme überschrieben */
  --bs-body-bg: #ffffff;
  --bs-body-color: #111111;
  --border-color: #e5e7eb;
  --muted: #6c757d;
  --surface: #ffffff;
  --placeholder-bg: #f4f6f8;
  --placeholder-border: #d0d7de;
}

/* Light Theme – gesteuert über data-theme="light" */
html[data-theme="light"] {
  color-scheme: light;
  --bs-body-bg: #ffffff;
  --bs-body-color: #111111;
  --border-color: #e5e7eb;
  --muted: #6c757d;
  --surface: #ffffff;
  --placeholder-bg: #f4f6f8;
  --placeholder-border: #d0d7de;
  --bs-link-color: #00597C;
  --bs-link-hover-color: #0699cf;
}

/* Dark Theme – gesteuert über data-theme="dark" */
html[data-theme="dark"] {
  color-scheme: dark;
  --bs-body-bg: #0b0c0f;
  --bs-body-color: #e6e6e6;
  --border-color: #2a2f36;
  --muted: #9aa4af;
  --surface: #111316;
  --placeholder-bg: #151a20;
  --placeholder-border: #2a2f36;
  --bs-link-color: #57c8f0;
  --bs-link-hover-color: #7dd4f4;
}

:root.loading * { transition: none !important; }

body,
header,
footer,
.card-lite,
.placeholder-block,
.nav-link,
.btn {
  transition: opacity .2s ease, transform .2s ease;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  html { scroll-behavior: auto; }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Tahoma, sans-serif;
  color: var(--bs-body-color);
  background: var(--bs-body-bg);
}

a { text-decoration: none; }

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

header {
  background: var(--surface);
  min-height: 64px;
}

.header-brand { color: var(--brand-secondary); }

html[data-theme="dark"] .header-brand { color: var(--bs-body-color); }

.header-brand .brand-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  display: inline-block;
}


.nav-pills .nav-link { border-radius: .5rem; }

.nav-pills .nav-link.active { background-color: var(--brand-primary); }

.theme-toggle .theme-icon {
  display: inline-block;
  line-height: 1;
}

.theme-toggle { padding-inline: .6rem; }

.btn-primary {
  --bs-btn-bg: var(--brand-primary);
  --bs-btn-border-color: var(--brand-primary);
  --bs-btn-hover-bg: #000000;
  --bs-btn-hover-border-color: #000000;
}

.btn-outline-primary {
  --bs-btn-color: var(--brand-primary);
  --bs-btn-border-color: var(--brand-primary);
  --bs-btn-hover-bg: var(--brand-primary);
  --bs-btn-hover-border-color: var(--brand-primary);
  --bs-btn-hover-color: #fff;
}

.hero-wrap {
  padding-top: 0.5rem;
  padding-bottom: 1.5rem;
}

.hero-image {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  background: var(--surface);
  border: 1px solid var(--border-color);
}

.placeholder-block {
  min-height: 280px;
  background: var(--placeholder-bg);
  border: 1px dashed var(--placeholder-border);
  border-radius: .75rem;
}

footer .nav .nav-link { color: var(--muted); }

footer .nav .nav-link:hover { color: var(--bs-body-color); }

footer .copy { color: var(--muted); }

.card-lite {
  border: 1px solid var(--border-color);
  border-radius: .75rem;
  background: var(--surface);
}

.form-control:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 .2rem rgba(0, 173, 239, .15);
}

@media (min-width: 768px) {
  .hero-wrap { padding-top: 2rem; padding-bottom: 3rem; }
  .placeholder-block { min-height: 360px; }
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-meta { margin-left: auto; }
}

footer .nav .nav-link { white-space: nowrap; }

@media (max-width: 380px) {
  footer .nav .nav-link {
    padding-inline: .35rem;
    font-size: .95rem;
  }
}

@media (max-width: 340px) {
  footer .nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* Dark Theme – Buttons */
html[data-theme="dark"] :is(
  .btn,
  .btn-primary,
  .btn-secondary,
  .btn-success,
  .btn-danger,
  .btn-warning,
  .btn-info,
  .btn-light,
  .btn-dark,
  [class*="btn-outline-"]
) {
  --bs-btn-bg: #000000;
  --bs-btn-border-color: #9aa4af;
  --bs-btn-color: #ffffff;
  --bs-btn-hover-bg: #000000;
  --bs-btn-hover-border-color: #ffffff;
  --bs-btn-hover-color: #ffffff;
  --bs-btn-active-bg: #000000;
  --bs-btn-active-border-color: #ffffff;
  --bs-btn-active-color: #ffffff;
  --bs-btn-disabled-bg: #000000;
  --bs-btn-disabled-border-color: #ffffff;
  --bs-btn-disabled-color: #ffffff;
}

/* Header Nav Layout */
header .nav.nav-pills { gap: .5rem; }

@media (max-width: 380px) {
  header .nav.nav-pills { gap: .35rem; }
}

/* Dark Theme – Nav Pills */
html[data-theme="dark"] .nav-pills {
  --bs-nav-pills-link-active-bg: #000000;
  --bs-nav-pills-link-active-color: #ffffff;
}

html[data-theme="dark"] .nav-pills .nav-link {
  background-color: #000000;
  color: #ffffff;
  border: 1px solid #9aa4af;
  transition: border-color .15s ease;
}

html[data-theme="dark"] .nav-pills .nav-link:not(.active):hover,
html[data-theme="dark"] .nav-pills .nav-link:not(.active):focus,
html[data-theme="dark"] .nav-pills .nav-link:not(.active):focus-visible {
  border-color: #ffffff;
}

html[data-theme="dark"] .nav-pills .nav-link.active,
html[data-theme="dark"] .nav-pills .show > .nav-link {
  background-color: #000000;
  color: #ffffff;
  border-color: #FFD700;
}

html[data-theme="dark"] .nav-pills .nav-link.active:hover,
html[data-theme="dark"] .nav-pills .nav-link.active:focus,
html[data-theme="dark"] .nav-pills .nav-link.active:focus-visible {
  border-color: #FFD700;
}

/* Light Theme – Nav Pills */
html[data-theme="light"] .nav-pills {
  --bs-nav-pills-link-active-bg: #ffffff;
  --bs-nav-pills-link-active-color: #111111;
}

html[data-theme="light"] .nav-pills .nav-link {
  background-color: #ffffff;
  color: #111111;
  border: 1px solid #00597c;
  transition: border-color .15s ease;
}

html[data-theme="light"] .nav-pills .nav-link:not(.active):hover,
html[data-theme="light"] .nav-pills .nav-link:not(.active):focus,
html[data-theme="light"] .nav-pills .nav-link:not(.active):focus-visible {
  border-color: #000000;
}

html[data-theme="light"] .nav-pills .nav-link.active,
html[data-theme="light"] .nav-pills .show > .nav-link {
  background-color: #ffffff;
  color: #111111;
  border-color: #000000;
}

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

.visually-hidden-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  padding: .5rem 1rem;
  background: #000;
  color: #fff;
  z-index: 1000;
}