/* ==========================================================================
   institutio.info — custom.css
   Umsetzung des Claude-Design-Entwurfs (test.institutio.info) für Bootstrap 5.3.
   Import in Bootstrap Studio NACH bootstrap.min.css und template.css.
   Abweichungen vom Entwurf (abgestimmt): Serifen-Akzent nur im Hero,
   Mono-Label bei den vier Kacheln entfällt, ruhigere Button-Radien,
   Akzent #E1B563 statt #EBD09E.
   ========================================================================== */

/* ---------- 1. Tokens ---------- */

:root {
  --inst-bg: #FBFBF9;
  --inst-soft: #F2F1EC;
  --inst-band: #EFE7D8;
  --inst-dark: #282D31;
  --inst-ink: #13171A;
  --inst-ink-soft: #5E666B;
  --inst-ink-band: #241F18;
  --inst-on-dark: #FBFBF9;
  --inst-on-dark-2: #AAB3B8;
  --inst-on-dark-3: #8D979C;
  --inst-accent: #E1B563;
  --inst-accent-hov: #D4A44E;
  --inst-accent-ink: #8A6D3F;
  --inst-line: #E4E2DB;
  --inst-line-band: #D9CDB5;
  --inst-line-dark: rgba(255, 255, 255, .1);
  --inst-mono-band: #8A7C62;
  --inst-mono-num: #9C8E73;
  --inst-r-sm: 8px;
  --inst-r-md: 12px;
  --inst-r-lg: 16px;
  --inst-ff-head: 'Instrument Sans', system-ui, -apple-system, sans-serif;
  --inst-ff-body: 'Manrope', system-ui, -apple-system, sans-serif;
  --inst-ff-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;
  --inst-ff-serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
}

/* ---------- 2. Grundlagen ---------- */

body {
  background: var(--inst-bg);
  background-image: none !important;
  color: var(--inst-ink);
  font-family: var(--inst-ff-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.bg-custom-gradient {
  background-image: none !important;
}

a {
  color: inherit;
}

/* Container auf die Entwurfsbreite */

.inst-container {
  max-width: 1240px;
  padding-inline: clamp(20px, 4vw, 56px);
}

/* ---------- 3. Bänder ---------- */

.inst-band-dark {
  background: var(--inst-dark);
  color: var(--inst-on-dark);
}

.inst-band-sand {
  background: var(--inst-band);
  color: var(--inst-ink-band);
}

.inst-band-soft {
  background: var(--inst-soft);
}

.inst-section {
  padding-block: 72px;
}

.inst-section-sm {
  padding-block: 56px;
}

@media (max-width: 767.98px) {
  .inst-section {
    padding-block: 48px;
  }
}

@media (max-width: 767.98px) {
  .inst-section-sm {
    padding-block: 36px;
  }
}

/* ---------- 4. Typografie ---------- */

.inst-h1 {
  font-family: var(--inst-ff-head);
  font-weight: 600;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.02;
  letter-spacing: -.04em;
  text-wrap: balance;
  margin: 0 0 24px;
  color: var(--inst-ink);
}

.inst-h2 {
  font-family: var(--inst-ff-head);
  font-weight: 600;
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1.1;
  letter-spacing: -.035em;
  text-wrap: balance;
  margin: 0;
  color: var(--inst-ink);
}

.inst-h2--sm {
  font-size: clamp(24px, 2.6vw, 28px);
  letter-spacing: -.03em;
  line-height: 1.15;
}

.inst-h3 {
  font-family: var(--inst-ff-head);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -.025em;
  text-wrap: pretty;
  margin: 0;
  color: var(--inst-ink);
}

.inst-lead {
  color: var(--inst-ink-soft);
  font-size: 18px;
  line-height: 1.65;
  max-width: 52ch;
  text-wrap: pretty;
  margin: 0;
}

.inst-text {
  font-size: 15.5px;
  line-height: 1.6;
  text-wrap: pretty;
  margin: 0;
  color: var(--inst-ink-soft);
}

.inst-text-sm {
  font-size: 15px;
  line-height: 1.6;
  text-wrap: pretty;
  margin: 0;
  color: var(--inst-ink-soft);
}

.inst-aside {
  max-width: 34ch;
}

/* Mono-Label: Kicker über Abschnitten, Zählnummern, Themenband */

.inst-mono {
  font-family: var(--inst-ff-mono);
  font-weight: 400;
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .14em;
  text-transform: uppercase;
  margin: 0;
}

.inst-mono--wide {
  letter-spacing: .2em;
}

.inst-mono--num {
  font-size: 13px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--inst-mono-num);
}

/* Serifen-Akzent: ausschließlich im Hero (ein Wort) */

.inst-serif {
  font-family: var(--inst-ff-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1.03em;
  letter-spacing: -.01em;
  color: var(--inst-accent);
}

/* Textfarben je Band */

.inst-band-dark .inst-h1, .inst-band-dark .inst-h2, .inst-band-dark .inst-h3 {
  color: var(--inst-on-dark);
}

.inst-band-dark .inst-lead, .inst-band-dark .inst-text {
  color: var(--inst-on-dark-2);
}

.inst-band-dark .inst-mono {
  color: var(--inst-on-dark-3);
}

.inst-band-sand .inst-h2 {
  color: var(--inst-ink-band);
}

.inst-band-sand .inst-mono {
  color: var(--inst-mono-band);
}

/* ---------- 5. Buttons ---------- */

.inst-btn {
  display: inline-block;
  font-family: var(--inst-ff-head);
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  text-decoration: none;
  padding: 15px 22px;
  border-radius: var(--inst-r-sm);
  border: 1px solid transparent;
  transition: background-color .15s ease, border-color .15s ease;
}

.inst-btn:hover {
  text-decoration: none;
}

.inst-btn--accent {
  background: var(--inst-accent);
  color: var(--inst-ink);
}

.inst-btn--accent:hover {
  background: var(--inst-accent-hov);
  color: var(--inst-ink);
}

.inst-btn--outline-light {
  color: var(--inst-on-dark);
  border-color: rgba(255,255,255,.25);
}

.inst-btn--outline-light:hover {
  background: rgba(255,255,255,.08);
  color: var(--inst-on-dark);
}

.inst-btn--light {
  background: var(--inst-bg);
  color: var(--inst-ink);
}

.inst-btn--light:hover {
  background: #FFFFFF;
  color: var(--inst-ink);
}

.inst-btn--sm {
  font-size: 14px;
  padding: 13px 18px;
}

/* ---------- 6. Navigation ---------- */

.navbar.inst-nav .navbar-nav .nav-link.active {
  color: #C3CACD !important;
  box-shadow: none !important;
  border-bottom: 0 !important;
  text-decoration: none !important;
}

.navbar.inst-nav {
  background-color: var(--inst-dark) !important;
  border-bottom: 1px solid var(--inst-line-dark);
  padding-block: 20px;
  color: var(--inst-on-dark);
  transition: padding .2s ease, background-color .2s ease;
}

.navbar.inst-nav.is-scrolled {
  background-color: rgba(40, 45, 49, .82) !important;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding-block: 12px;
}

.inst-wordmark {
  font-family: var(--inst-ff-head);
  font-weight: 600;
  font-size: 17px;
  line-height: 1;
  letter-spacing: -.02em;
  text-decoration: none;
  color: var(--inst-on-dark);
}

.inst-wordmark span {
  color: #7F8A90;
}

.inst-nav .nav-link {
  font-family: var(--inst-ff-head);
  font-weight: 400;
  font-size: 14.5px;
  color: #C3CACD;
  padding: 6px 0;
}

.inst-nav .nav-link:hover, .inst-nav .nav-link:focus-visible {
  color: var(--inst-on-dark);
}

.inst-nav .nav-link.active {
  color: var(--inst-on-dark);
}

.inst-nav .navbar-toggler {
  border-color: rgba(255,255,255,.25);
}

.inst-nav .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28251,251,249,0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ---------- 7. Hero ---------- */

.inst-hero-img {
  width: 100%;
  height: 492px;
  object-fit: cover;
  object-position: center 22%;
  display: block;
  border-radius: var(--inst-r-md);
}

@media (max-width: 991.98px) {
  .inst-hero-img {
    height: 380px;
  }
}

.inst-topicbar {
  border-top: 1px solid var(--inst-line-dark);
  padding-block: 16px;
}

.inst-topicbar ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 16px;
}

.inst-topicbar li {
  display: flex;
  align-items: center;
  gap: 16px;
}

.inst-topicbar li + li::before {
  content: "·";
  color: var(--inst-on-dark-3);
}

/* ---------- 8. Kacheln "Vier Wege" ---------- */

.inst-tile {
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-decoration: none;
  height: 100%;
}

.inst-tile:hover .inst-h3 {
  color: var(--inst-accent-ink);
}

.inst-tile-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: block;
  object-fit: cover;
  border-radius: var(--inst-r-md);
}

.inst-tile-img--contain {
  object-fit: contain;
  background: var(--inst-soft);
  padding: 8px;
}

/* ---------- 9. Nutzen-Karten ---------- */

.inst-panel {
  background: var(--inst-soft);
  border-radius: var(--inst-r-lg);
  padding: 44px clamp(24px, 3vw, 40px);
}

.inst-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--inst-bg);
  border-radius: var(--inst-r-md);
  padding: 26px;
  height: 100%;
  text-decoration: none;
  transition: box-shadow .15s ease;
}

.inst-card:hover {
  box-shadow: 0 6px 24px -12px rgba(19,23,26,.35);
}

.inst-card .inst-text-sm {
  flex: 1;
}

.inst-card-more {
  font-family: var(--inst-ff-head);
  font-weight: 600;
  font-size: 13px;
  line-height: 1;
  color: var(--inst-accent-ink);
}

/* ---------- 10. Nummerierte Liste (01–04) ---------- */

.inst-numlist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.inst-numlist li {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--inst-line-band);
}

.inst-numlist li:last-child {
  border-bottom: 1px solid var(--inst-line-band);
}

.inst-numlist span:last-child {
  font-size: 17px;
  line-height: 1.45;
  color: var(--inst-ink-band);
}

.inst-band-img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
  border-radius: var(--inst-r-md);
}

@media (max-width: 991.98px) {
  .inst-band-img {
    height: 320px;
  }
}

/* ---------- 11. Textkasten mit Haarlinien / dunkler Kontaktkasten ---------- */

.inst-rule {
  border-top: 1px solid var(--inst-line);
  border-bottom: 1px solid var(--inst-line);
  padding-block: 18px;
}

.inst-box-dark {
  background: var(--inst-dark);
  border-radius: var(--inst-r-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
}

/* ---------- 12. Footer ---------- */

.inst-footer {
  padding-block: 28px;
  font-size: 13px;
  color: var(--inst-on-dark-3);
}

.inst-footer a {
  text-decoration: none;
}

.inst-footer a:hover {
  color: var(--inst-on-dark);
}

/* ---------- 13. Zugänglichkeit ---------- */

:focus-visible {
  outline: 3px solid var(--inst-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}