:root {

  --saphirblau:       #032352;
  --offwhite:         #FAF8EC;
  --offwhite-getoent: #F2EFDD;
  --text:             #1B2230;
  --text-gedaempft:   #4A5365;

  --schrift-frutiger: "Frutiger Next LT W1G", Verdana, "DejaVu Sans", Geneva, sans-serif;
  --schrift-verdana:  Verdana, "DejaVu Sans", Geneva, sans-serif;
  --schrift:          var(--schrift-frutiger);


  --netz-deckkraft: 0.09;
  --netz-breite:    min(78vw, 60rem);


  --seitenrand:     clamp(1.25rem, 5vw, 2.5rem);
  --inhaltsbreite:  62rem;
  --abschnitt-luft: clamp(3.5rem, 9vw, 6.5rem);
  --akzent-breite:  3rem;
}


@font-face {
  font-family: "Frutiger Next LT W1G";
  src: url("../fonts/frutigernextltw1g-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Frutiger Next LT W1G";
  src: url("../fonts/frutigernextltw1g-italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Frutiger Next LT W1G";
  src: url("../fonts/frutigernextltw1g-bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}


*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--schrift);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.65;
  color: var(--text);
  background-color: var(--offwhite);
}

.container {
  width: 100%;
  max-width: calc(var(--inhaltsbreite) + 2 * var(--seitenrand));
  margin-inline: auto;
  padding-inline: var(--seitenrand);
}

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

a {
  color: var(--saphirblau);
  text-underline-offset: 0.2em;
  text-decoration-thickness: 0.08em;
}
a:hover {
  text-decoration-thickness: 0.14em;
}


.kopfleiste {
  background-color: var(--offwhite);
}
.kopfleiste__innen {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.6rem;
}
.kopfleiste__logo {
  display: block;
  line-height: 0;
}
.kopfleiste__logo img {
  display: block;
  height: clamp(2.75rem, 7vw, 3.25rem);
  width: auto;
}
.kopfleiste__links {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: clamp(0.875rem, 0.8rem + 0.2vw, 1rem);
  font-weight: 700;
}
.kopfleiste__links a {
  display: inline-block;
  padding-block: 0.75rem;
  text-decoration: none;
}
.kopfleiste__links a:hover {
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.hero {
  position: relative;
  overflow: hidden;
  background-color: var(--saphirblau);
  color: var(--offwhite);
  padding-block: clamp(3rem, 8vw, 5.5rem) clamp(3.5rem, 9vw, 6rem);
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 0 0 auto;
  width: var(--netz-breite);
  background: url("../img/netz.svg") no-repeat right top / cover;
  opacity: var(--netz-deckkraft);
  -webkit-mask-image: linear-gradient(to left, #000 35%, transparent 100%);
          mask-image: linear-gradient(to left, #000 35%, transparent 100%);
  pointer-events: none;
  z-index: -1;
}

.hero__titel {
  margin: 0;
  font-size: clamp(2.25rem, 1.2rem + 5vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 700;
  max-width: 16em;
}

.hero__veranstaltung {
  display: block;
  margin-bottom: 1.25rem;
  font-size: clamp(0.9rem, 0.85rem + 0.3vw, 1.05rem);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.8;
}

.hero__untertitel {
  margin: 1.75rem 0 0;
  font-size: clamp(1.15rem, 1rem + 1vw, 1.75rem);
  font-style: italic;
  line-height: 1.4;
}

.eckdaten {
  margin: clamp(2.25rem, 5.5vw, 3.75rem) 0 0;
  display: grid;
  gap: 1.1rem;
  max-width: 48rem;
}
.eckdaten__zeile {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 0.25rem 1rem;
}
.eckdaten__zeile--abgesetzt {
  margin-top: 1rem;
}
.eckdaten dt {
  opacity: 0.8;
}
.eckdaten dd {
  margin: 0;
  font-weight: 700;
}
.eckdaten__adresse {
  display: block;
  margin-top: 0.15rem;
  font-weight: 400;
  opacity: 0.85;
}

.nicht-umbrechen {
  white-space: nowrap;
}

@media (max-width: 40rem) {
  :root {
    --netz-breite: 125vw;
  }
}

@media (max-width: 30rem) {
  .eckdaten__zeile {
    grid-template-columns: 1fr;
  }
  .eckdaten dt {
    font-size: 0.9em;
  }
}

.knopf {
  display: inline-block;
  margin-top: 0.9rem;
  padding: 0.5rem 1.1rem;
  border: 1.5px solid currentColor;
  border-radius: 999px;
  color: var(--offwhite);
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.15s, color 0.15s;
}
.knopf:hover {
  background-color: var(--offwhite);
  color: var(--saphirblau);
  text-decoration: none;
}

.abschnitt {
  padding-block: var(--abschnitt-luft);
}

.abschnitt--getoent {
  background-color: var(--offwhite-getoent);
}

.abschnitt__titel {
  margin: 0 0 1.75rem;
  font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.1rem);
  line-height: 1.2;
  color: var(--saphirblau);
}
.abschnitt__titel::before {
  content: "";
  display: none;
  width: var(--akzent-breite);
  height: 4px;
  margin-bottom: 1.5rem;
  background-color: var(--saphirblau);
  border-radius: 2px;
}

.abschnitt__text {
  margin: 0;
  max-width: 40rem;
  color: var(--text-gedaempft);
}

.agenda {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 48rem;
}
.agenda__punkt {
  display: grid;
  grid-template-columns: 4.75rem 1fr;
  gap: 1rem;
  padding-block: 1.1rem;
}
.agenda__zeit {
  font-weight: 700;
  color: var(--saphirblau);
  font-variant-numeric: tabular-nums;
}
.agenda__titel,
.agenda__referent {
  margin: 0;
}
.agenda__titel {
  font-weight: 700;
  line-height: 1.4;
}
.agenda__referent {
  margin-top: 0.25rem;
  font-size: 0.95em;
  color: var(--text-gedaempft);
}

.agenda__details {
  margin-top: 0.5rem;
}
.agenda__details summary {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding-block: 0.3rem;
  cursor: pointer;
  list-style: none;
  color: var(--saphirblau);
  font-size: 0.95em;
  font-weight: 700;
}
.agenda__details summary::-webkit-details-marker {
  display: none;
}
.agenda__details summary:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.agenda__details summary::after {
  content: "";
  width: 0.5em;
  height: 0.5em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-0.12em) rotate(45deg);
  transition: transform 0.15s;
}
.agenda__details[open] summary::after {
  transform: translateY(0.1em) rotate(-135deg);
}
.agenda__details summary:focus-visible {
  outline: 3px solid var(--saphirblau);
  outline-offset: 3px;
  border-radius: 2px;
}
.agenda__beschreibung {
  max-width: 38rem;
  margin-top: 0.6rem;
  font-size: 0.95em;
}
.agenda__beschreibung p {
  margin: 0 0 0.85em;
}
.agenda__beschreibung p:last-child {
  margin-bottom: 0;
}

.agenda__punkt--pause .agenda__titel {
  font-weight: 400;
  font-style: italic;
  color: var(--text-gedaempft);
}
@media (max-width: 30rem) {
  .agenda__punkt {
    grid-template-columns: 3.75rem 1fr;
    gap: 0.75rem;
  }
}

.folienliste {
  margin: 0;
  padding-left: 1.2rem;
  max-width: 48rem;
}
.folienliste li {
  margin-bottom: 0.6rem;
}

.logos {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: clamp(1.5rem, 6vw, 6rem);
}
.logos img {
  height: clamp(2rem, 9vw, 4rem);
  width: auto;
  min-width: 0;
  object-fit: contain;
  object-position: left center;
}

.fuss {
  padding-block: 1.75rem;
  background-color: var(--saphirblau);
  color: var(--offwhite);
  font-size: 0.95rem;
  text-align: center;
}
.fuss a {
  color: var(--offwhite);
}
.fuss nav > span {
  margin-inline: 0.6rem;
  opacity: 0.6;
}

.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  padding: 0.75rem 1.25rem;
  background-color: var(--offwhite);
  color: var(--saphirblau);
  font-weight: 700;
  transform: translateY(-110%);
}
.skip-link:focus {
  transform: translateY(0);
}

a:focus-visible {
  outline: 3px solid var(--saphirblau);
  outline-offset: 3px;
  border-radius: 2px;
}
.hero a:focus-visible,
.fuss a:focus-visible {
  outline-color: var(--offwhite);
}

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

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