/* ==========================================================================
   SMTP Symposium - Stylesheet
   Instanz ivt, Kontext smtp-en, Templates "SMTP mit Slider" / "SMTP ohne Slider"
   Erscheinungsbild nach Vorlage (LEC-Palette), bereinigt: ohne Dark Mode,
   ohne Bootstrap, ohne Inline-Styles im Template
   Stand: 2026-11-12
   ========================================================================== */

/* ---------- Grundwerte ---------- */
:root {
  --blue: #275C88;          /* Banner, aktives Menue, Links, Slider-Overlay */
  --navy: #1F4E79;          /* Footer-Leiste, Hover */
  --dark: #214C6E;
  --light: #DCE6F2;
  --slate: #879AA1;         /* nur dekorativ */
  --soft: #F2F2F2;          /* Navigationsleiste, Flaechen */
  --line: #D9D9D9;
  --text: #404040;
  --muted: #5F7178;
  --bg: #FFFFFF;
  --on-blue-muted: #C9D6E0;
  --focus: #8DB4DE;
  --wrap: 1140px;
  color-scheme: light;
}

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

html {
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  scroll-padding-top: env(safe-area-inset-top, 0px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Verdana, "DejaVu Sans", Geneva, Tahoma, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

img { max-width: 100%; height: auto; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

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

.skip-link {
  position: absolute; left: -9999px; top: 8px; z-index: 100;
  background: var(--blue); color: #fff; padding: 8px 16px; font-weight: bold; text-decoration: none;
}
.skip-link:focus { left: 16px; }

/* ---------- Schaltflaechen ---------- */
.btn {
  display: inline-block; padding: 12px 22px; font-size: 15px; font-weight: bold;
  line-height: 1.3; text-decoration: none; border: 2px solid var(--blue); cursor: pointer;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--navy); border-color: var(--navy); }
.btn-secondary { background: transparent; color: var(--blue); }
.btn-secondary:hover { background: var(--light); }
.btn-small { padding: 8px 14px; font-size: 14px; }

/* ---------- Kopf: Kontaktzeile ---------- */
.topbar { background: #fff; font-size: 13px; }
.topbar .wrap { display: flex; justify-content: flex-end; gap: 16px; padding-top: 6px; padding-bottom: 6px; }
.topbar a { color: var(--text); text-decoration: none; }
.topbar a:hover { color: var(--blue); }
.topbar a[aria-current="page"] { color: var(--blue); font-weight: bold; }

/* ---------- Kopf: Logo und Termin ---------- */
.logobar { background: #fff; border-bottom: 1px solid var(--line); }
.logobar .wrap {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding-top: 10px; padding-bottom: 16px; flex-wrap: wrap;
}
.smtp-logo { display: block; text-decoration: none; }
.smtp-logo img { display: block; height: 64px; width: auto; }
.head-event { display: flex; align-items: center; gap: 20px; }
.head-date { font-size: 14px; line-height: 1.4; text-align: right; }
.head-date strong { color: var(--blue); }
.logobar .btn { padding: 10px 18px; font-size: 14px; white-space: nowrap; }

/* ---------- Seitentitel ---------- */
.banner { background: var(--blue); color: #fff; }
.banner h1 { margin: 0; font-size: 26px; line-height: 1.3; padding: 14px 0; font-weight: bold; }

/* ---------- Hauptnavigation ---------- */
.mainnav { background: var(--soft); border-bottom: 1px solid var(--line); position: relative; z-index: 30; }
.mainnav ul { list-style: none; margin: 0; padding: 0; }
.mainnav .nav-root { display: flex; }
.mainnav li { position: relative; }
.mainnav .nav-root > li > a,
.mainnav button.sub {
  display: flex; align-items: center; gap: 6px; padding: 12px 18px;
  text-decoration: none; color: var(--text); font: inherit; font-size: 15px;
  background: none; border: 0; border-bottom: 3px solid transparent; cursor: pointer;
}
.mainnav .nav-root > li > a:hover,
.mainnav button.sub:hover { color: var(--blue); }
.mainnav .nav-root > li > a[aria-current="page"],
.mainnav button.sub.active { color: var(--blue); font-weight: bold; border-bottom-color: var(--blue); }
.caret { font-size: 10px; }
.dropdown {
  display: none; position: absolute; left: 0; top: 100%; min-width: 240px;
  background: #fff; box-shadow: 0 6px 18px rgba(0, 0, 0, .18); border-top: 3px solid var(--blue);
}
.dropdown a { display: block; padding: 10px 18px; color: var(--text); text-decoration: none; font-size: 14px; }
.dropdown a:hover { background: var(--light); color: var(--dark); }
.dropdown a[aria-current="page"] { background: var(--light); color: var(--dark); font-weight: bold; }
li.has-sub:hover .dropdown,
li.has-sub:focus-within .dropdown,
li.has-sub.open .dropdown { display: block; }
li.has-sub.suppress .dropdown { display: none !important; }
.nav-toggle { position: absolute; width: 1px; height: 1px; opacity: 0; margin: 0; }
.nav-toggle:focus-visible + .menu-toggle { outline: 3px solid var(--focus); outline-offset: 2px; }
.menu-toggle { display: none; user-select: none; -webkit-user-select: none; touch-action: manipulation; }

/* ---------- Slider ---------- */
.slider {
  position: relative; overflow: hidden; background: var(--navy);
  width: calc(100% - 48px); max-width: 1092px; margin: 32px auto 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .15);
}
.slides {
  display: flex; margin: 0; padding: 0; list-style: none;
  overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none;
  -webkit-overflow-scrolling: touch; overscroll-behavior-x: contain;
}
.slides::-webkit-scrollbar { display: none; }
.slide { flex: 0 0 100%; scroll-snap-align: start; position: relative; aspect-ratio: 2 / 1; margin: 0; }
.slide img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center 40%; }
.credit {
  position: absolute; right: 12px; bottom: 8px; font-size: 11px; color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .6);
}
.overlay {
  position: absolute; left: 72px; top: 50%; transform: translateY(-50%);
  background: rgba(39, 92, 136, .92); color: #fff; padding: 26px 32px;
  max-width: min(540px, calc(100% - 48px)); pointer-events: none;
}
.overlay a { pointer-events: auto; }
.overlay .kicker { margin: 0 0 6px; font-size: clamp(14px, 1.9vw, 20px); font-weight: bold; line-height: 1.2; }
.overlay .kicker a { color: var(--on-blue-muted); text-decoration: none; }
.overlay .kicker a:hover { color: #fff; text-decoration: underline; }
.overlay h2 { margin: 0; font-size: clamp(22px, 3.4vw, 36px); line-height: 1.2; }
.overlay .venue { margin: 8px 0 0; font-size: clamp(16px, 2.2vw, 24px); font-weight: bold; line-height: 1.3; }
.ctrl {
  position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px;
  border: 0; background: rgba(255, 255, 255, .85); color: var(--blue); font-size: 22px; line-height: 1; cursor: pointer;
}
.ctrl:hover { background: #fff; }
.ctrl.prev { left: 12px; }
.ctrl.next { right: 12px; }
.ctrl.pause { top: auto; bottom: 12px; left: 12px; transform: none; width: 36px; height: 36px; font-size: 14px; }
.no-js .ctrl { display: none; }

/* ---------- Inhalt ---------- */
main { display: block; }
.content { padding-top: 40px; padding-bottom: 56px; }
.content > :first-child { margin-top: 0; }
.content h2 { color: var(--blue); font-size: 26px; line-height: 1.25; margin: 1.6em 0 .6em; }
.content h3 { color: var(--blue); font-size: 21px; line-height: 1.3; margin: 1.5em 0 .5em; }
.content h4 { font-size: 17px; line-height: 1.35; margin: 1.4em 0 .4em; }
.content p { margin: 0 0 1em; }
.content ul, .content ol { margin: 0 0 1em; padding-left: 1.4em; }
.content li { margin: .25em 0; }
.content a { color: var(--blue); }
.content a:hover { color: var(--navy); }
.content a.external::after { content: "\2009\2197"; font-size: .85em; }
.content a.download::before { content: "\2193\2009"; }
.content hr { border: 0; border-top: 1px solid var(--line); margin: 2em 0; }
.content table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; margin: 0 0 1.5em; }
.content th, .content td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; vertical-align: top; }
.content th { background: var(--soft); }
.content figure { margin: 0 0 1.5em; }
.content figcaption { font-size: 13px; color: var(--muted); margin-top: 6px; }
.lead { font-size: 19px; max-width: 68ch; }

/* Unterseitenliste (Information, Archive) */
.link-list { list-style: none; margin: 0; padding: 0; max-width: 760px; }
.link-list li + li { border-top: 1px solid var(--line); }
.link-list a { display: block; padding: 14px 0; color: var(--blue); font-size: 20px; font-weight: bold; text-decoration: none; }
.link-list a::before { content: "\00BB\00A0"; }
.link-list a:hover { color: var(--navy); text-decoration: underline; }

/* ---------- Inhaltsbausteine (Save the date, Location, How to find us, Contact) ---------- */
.std-hero { background: var(--soft); border-bottom: 1px solid var(--line); }
.std-hero .wrap {
  display: grid; grid-template-columns: 1fr minmax(260px, 340px); gap: 48px; align-items: center;
  padding-top: 48px; padding-bottom: 48px;
}
.std-kicker { color: var(--muted); font-size: 15px; font-weight: bold; margin: 0 0 6px; }
.std-hero h2 { font-size: clamp(40px, 6vw, 64px); color: var(--blue); letter-spacing: -.02em; margin: 0; line-height: 1.1; }
.std-hero .sub { font-size: 19px; max-width: 38ch; margin: 12px 0 26px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.date-card { background: var(--blue); color: #fff; padding: 28px 30px; box-shadow: 0 10px 30px rgba(0, 0, 0, .2); }
.date-card .days { font-size: 64px; font-weight: bold; line-height: 1; letter-spacing: -.03em; }
.date-card .month { font-size: 21px; font-weight: bold; margin-top: 8px; }
.date-card .place { margin-top: 6px; color: var(--on-blue-muted); }
.fields { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 28px 0; padding: 0; list-style: none; }
.fields li {
  background: var(--light); color: var(--dark); padding: 22px 20px; font-weight: bold;
  min-height: 104px; display: flex; align-items: flex-end; margin: 0;
}
.fields li span { display: block; max-width: 15.5ch; }
.notice { display: inline-block; background: var(--light); color: var(--dark); padding: 6px 12px; font-size: 14px; margin: 0 0 20px; }
.days-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.day { background: var(--bg); box-shadow: 0 2px 8px rgba(0, 0, 0, .12); }
.day header { background: var(--blue); color: #fff; padding: 14px 20px; }
.day .weekday { color: var(--on-blue-muted); font-size: 14px; display: block; }
.day .date { font-size: 20px; font-weight: bold; }
.day dl { margin: 0; padding: 6px 20px 14px; }
.day .slot { padding: 12px 0; }
.day .slot + .slot { border-top: 1px solid var(--line); }
.day dt { color: var(--blue); font-weight: bold; font-size: 18px; }
.day dd { margin: 2px 0 0; font-size: 15px; }
.organizers { display: grid; grid-template-columns: 1fr minmax(240px, 380px); gap: 40px; align-items: center; }
.photo img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.closing { font-size: 19px; font-weight: bold; color: var(--blue); margin: 20px 0 0; }
.venues { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.venue-card { background: var(--bg); box-shadow: 0 2px 8px rgba(0, 0, 0, .12); display: flex; flex-direction: column; }
.venue-card header { background: var(--blue); color: #fff; padding: 16px 22px; }
.venue-card .role { color: var(--on-blue-muted); font-size: 14px; display: block; }
.venue-card .name { font-size: 21px; font-weight: bold; }
.venue-card .body { padding: 18px 22px 22px; display: flex; flex-direction: column; gap: 14px; flex: 1; }
.venue-card address { font-style: normal; }
.venue-card .links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; }
.contact-list { margin: 0; display: grid; gap: 12px; }
.contact-list div { display: grid; grid-template-columns: 80px 1fr; gap: 12px; }
.contact-list dt { color: var(--muted); }
.contact-list dd { margin: 0; font-weight: bold; }
.contact-list a { color: var(--blue); text-decoration: none; }
.contact-list a:hover { text-decoration: underline; }

/* ---------- Archiv: Programm (Collections + pdoResources) ---------- */
.tt-day { margin: 0 0 56px; }
.tt-day-title { text-align: center; margin: 0 0 24px; }
.tt-day-title a { color: var(--blue); text-decoration: none; }
.tt-day-title a:hover { text-decoration: underline; }
.tt-overview { max-width: 960px; margin: 0 auto; }
.tt-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 12px; }
.tt-span-1 { grid-column: span 1; }  .tt-span-2 { grid-column: span 2; }   .tt-span-3 { grid-column: span 3; }
.tt-span-4 { grid-column: span 4; }  .tt-span-5 { grid-column: span 5; }   .tt-span-6 { grid-column: span 6; }
.tt-span-7 { grid-column: span 7; }  .tt-span-8 { grid-column: span 8; }   .tt-span-9 { grid-column: span 9; }
.tt-span-10 { grid-column: span 10; } .tt-span-11 { grid-column: span 11; } .tt-span-12 { grid-column: span 12; }
.tt-session { color: #fff; text-align: center; padding: 12px 16px; font-weight: bold; font-size: 15px; line-height: 1.35; }
.tt-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 24px; margin: 14px 0 0; font-size: 14px; }
.tt-swatch { display: inline-block; width: 12px; height: 12px; margin-right: 6px; vertical-align: -1px; }
.tt-block { margin-top: 32px; }
.tt-head {
  color: #fff; padding: 18px 22px; min-height: 96px;
  background-repeat: no-repeat; background-position: bottom right; background-size: 20%;
}
.tt-head h3 { margin: 0; font-size: 21px; line-height: 1.3; color: #fff; }
.tt-head small { display: block; font-size: 15px; font-weight: normal; opacity: .9; margin-top: 4px; }
.tt-talk, .tt-break {
  display: grid; grid-template-columns: 7.5em minmax(0, 1fr); gap: 16px; padding: 16px 20px; margin-top: 12px;
}
.tt-talk { background: #fff; box-shadow: 0 2px 8px rgba(0, 0, 0, .12); }
.tt-break { background: var(--soft); }
.tt-time { font-weight: bold; text-align: center; }
.tt-talk h4, .tt-break h4 { margin: 0 0 6px; font-size: 17px; line-height: 1.35; }
.tt-talk p, .tt-break p { margin: 0; }

/* ---------- Archiv: Fotogalerie und Lightbox ---------- */
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin: 32px 0; padding: 0; list-style: none; }
.gallery li { margin: 0; }
.gallery a { display: block; border: 3px solid var(--line); }
.gallery a:hover { border-color: var(--blue); }
.gallery img { display: block; width: 100%; aspect-ratio: 11 / 8; object-fit: cover; }
.lightbox { border: 0; padding: 0; background: transparent; max-width: 94vw; max-height: 94vh; overflow: visible; }
.lightbox::backdrop { background: rgba(0, 0, 0, .88); }
.lightbox img { display: block; max-width: 94vw; max-height: 84vh; width: auto; height: auto; margin: 0 auto; }
.lightbox p { color: #fff; text-align: center; font-size: 14px; margin: 10px 0 0; }
.lb-btn {
  position: fixed; width: 44px; height: 44px; border: 0; background: rgba(255, 255, 255, .85);
  color: var(--blue); font-size: 22px; line-height: 1; cursor: pointer;
}
.lb-btn:hover { background: #fff; }
.lb-close { top: 12px; right: 12px; }
.lb-prev { left: 12px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 12px; top: 50%; transform: translateY(-50%); }

/* ---------- Footer ---------- */
.f-band { background: #fff; border-top: 1px solid var(--line); }
.f-band .wrap {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  padding-top: 28px; padding-bottom: 28px; flex-wrap: wrap;
}
.f-label { margin: 0 0 10px; font-size: 13px; color: var(--muted); }
.f-logos { display: flex; align-items: center; flex-wrap: wrap; }
.f-logos a { display: flex; align-items: center; padding: 0 28px; border-left: 1px solid var(--line); text-decoration: none; }
.f-logos a:first-child { padding-left: 0; border-left: 0; }
.f-logos img { display: block; height: 44px; width: auto; }
.f-smtp { display: block; text-decoration: none; }
.f-smtp img { display: block; height: 52px; width: auto; }
.f-bar { background: var(--navy); color: #fff; font-size: 14px; }
.f-bar .wrap {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap;
}
.f-bar a { color: #fff; text-decoration: none; }
.f-bar a:hover { text-decoration: underline; }
.f-sep { margin: 0 10px; opacity: .5; }

/* ---------- Responsiv ---------- */
@media (max-width: 900px) {
  .std-hero .wrap, .organizers { grid-template-columns: 1fr; gap: 28px; }
  .fields { grid-template-columns: repeat(2, 1fr); }
  .days-grid, .venues { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .slide { aspect-ratio: 4 / 3; }
  .slider { width: calc(100% - 36px); margin-top: 18px; }
  .overlay { left: 16px; right: 16px; max-width: none; padding: 18px 20px; }
  .ctrl.prev, .ctrl.next { top: auto; bottom: 8px; transform: none; width: 36px; height: 36px; font-size: 18px; }
  .ctrl.pause { bottom: 8px; left: 50%; transform: translateX(-50%); }
}
@media (max-width: 760px) {
  .tt-grid > * { grid-column: 1 / -1; }
  .tt-talk, .tt-break { grid-template-columns: 1fr; gap: 6px; }
  .tt-time { text-align: left; }
}
@media (max-width: 720px) {
  .head-date { display: none; }
  .logobar .btn { padding: 8px 12px; font-size: 13px; }
  .f-logos a { padding: 0 16px; }
  .f-logos img { height: 34px; }
  .f-smtp img { height: 42px; }
  .f-sep { display: block; height: 0; overflow: hidden; margin: 4px 0; }
}
@media (max-width: 680px) {
  .smtp-logo img { height: 48px; }
  .menu-toggle {
    display: inline-block; margin: 8px 0; background: none; border: 1px solid var(--line);
    padding: 8px 14px; font: inherit; font-size: 14px; color: var(--text); cursor: pointer;
  }
  .mainnav .nav-root { display: none; flex-direction: column; padding-bottom: 8px; }
  .nav-toggle:checked ~ .nav-root { display: flex; }
  .dropdown { position: static; display: block; box-shadow: none; border-top: 0; background: transparent; }
  .dropdown a { padding-left: 34px; }
  .mainnav button.sub { cursor: default; }
  .mainnav button.sub .caret { display: none; }
}
@media (max-width: 480px) {
  .fields { grid-template-columns: 1fr; }
  .fields li { min-height: 0; }
}

/* ---------- Bewegung reduzieren ---------- */
@media (prefers-reduced-motion: reduce) {
  .slides { scroll-behavior: auto; }
}

/* ---------- Druck ---------- */
@media print {
  .topbar, .mainnav, .ctrl, .skip-link, .head-event .btn, .f-bar { display: none !important; }
  .slider { box-shadow: none; }
  .content a.external::after { content: " (" attr(href) ")"; font-size: .8em; }
}

/* Bildnachweis unter einer Fotogalerie */
.gallery-caption { font-size: 13px; color: var(--muted); margin: -16px 0 32px; }

/* Bildnachweis unter einer Fotogalerie */
.gallery-caption { font-size: 13px; color: var(--muted); margin: -16px 0 32px; }