/* ==========================================================
   KLG CORPORATE DESIGN — tape-khi.at
   Basiert auf dem CD der Karl Landsteiner Gesellschaft
   ========================================================== */

:root {
  --klblau:     #2581c4;
  --klgelb:     #fecc16;
  --kltext:     #3c3c3b;
  --klblauhell: #daeaf6;
  --klgrauhell: #efefef;
  --klborder:   #e0e0e0;
}

/* ── BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Open Sans', 'Roboto', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  color: var(--kltext);
  background: #fff;
  line-height: 1.65;
}
img { display: block; max-width: 100%; }
a { color: var(--klblau); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4, h5, h6 {
  font-family: 'Open Sans', system-ui, sans-serif;
  font-weight: 300;
  color: var(--klblau);
  line-height: 1.25;
}
h1 { font-size: 2.6rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.35rem; font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; }
h5 { font-size: 1rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }
ul { padding-left: 1.5rem; }
li { margin-bottom: 0.4rem; }

/* ── LAYOUT ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 28px; }

/* Metabar entfernt */

/* ── NAVBAR (weißer Header mit Logo + Nav) ── */
.navbar {
  background: #fff;
  border-bottom: 1px solid var(--klborder);
  min-height: 110px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,.07);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 110px;
  gap: 24px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
  flex-shrink: 0;
}
.navbar-brand img {
  height: 80px;
  width: auto;
  display: block;
}
.navbar-brand:hover { text-decoration: none; }

/* Rechte Navigation */
.navbar-right {
  display: flex;
  align-items: center;
  gap: 0;
}
.navbar-nav {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0;
  margin: 0;
}
.nav-item { position: relative; }
.nav-link {
  display: block;
  padding: 12px 18px;
  color: var(--kltext);
  font-size: 1rem;
  font-weight: 400;
  text-decoration: none;
  letter-spacing: 0.01em;
  border-bottom: 3px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--klblau);
  border-bottom-color: var(--klblau);
  text-decoration: none;
}
.nav-link.active {
  color: var(--klblau);
  border-bottom-color: var(--klblau);
  font-weight: 600;
}

/* Mitglied-werden Button (gelb) */
.btn-mitglied {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--klgelb);
  color: var(--klblau);
  font-weight: 700;
  font-size: 0.875rem;
  padding: 10px 20px;
  border-radius: 0;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s;
  margin-left: 16px;
}
.btn-mitglied:hover { background: #e8b800; text-decoration: none; color: var(--klblau); }

/* ── HERO BANNER ── */
.hero {
  position: relative;
  width: 100%;
  height: 240px;
  overflow: hidden;
  background: var(--klblau);
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: left 20%;
  opacity: 0.6;
  display: block;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(37,129,196,0.55);
}

/* ── PAGE TITLE BAND (hellblauer Bereich unter dem Hero) ── */
.page-title-band {
  background: var(--klblauhell);
  padding: 40px 0 36px;
}
.page-title-band h1 {
  font-size: clamp(1.6rem, 2.5vw + 0.8rem, 2.6rem);
  color: var(--klblau);
  font-weight: 300;
  line-height: 1.25;
}
.breadcrumb {
  display: flex;
  gap: 6px;
  align-items: center;
  font-size: 0.85rem;
  color: #777;
  margin-top: 10px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--klblau); font-weight: 400; }
.breadcrumb span { color: #aaa; }

/* ── MAIN CONTENT ── */
.main-content { padding: 52px 0 72px; }

/* ── TWO-COLUMN LAYOUT ── */
.page-cols {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 52px;
  align-items: start;
}

/* ── SIDEBAR ── */
.sidebar-section { margin-bottom: 36px; }
.sidebar-heading {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #999;
  margin-bottom: 6px;
}
.sidebar-nav a {
  display: block;
  padding: 10px 0 10px 2px;
  border-bottom: 1px solid var(--klgrauhell);
  color: var(--kltext);
  font-size: 0.9375rem;
  font-weight: 400;
  text-decoration: none;
  transition: color 0.15s, padding-left 0.15s;
}
.sidebar-nav a:hover {
  color: var(--klblau);
  padding-left: 6px;
  text-decoration: none;
}
.sidebar-nav a.active {
  color: var(--klblau);
  font-weight: 600;
  padding-left: 6px;
  border-left: 3px solid var(--klblau);
}

/* ── SECTION HEADING (wie auf KLG: H5 blau, kein border) ── */
.section-h5 {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--klblau);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--klgelb);
  display: inline-block;
}

/* ── CONTENT CARD ── */
.kl-card {
  background: #fff;
  border: 1px solid #dce8f2;
  border-top: 3px solid var(--klgelb);
  border-radius: 2px;
  padding: 36px 40px;
  margin-bottom: 32px;
}
.kl-card h2 { margin-bottom: 24px; font-size: 1.5rem; }
.kl-card h3 { margin-bottom: 14px; font-size: 1.2rem; }

/* ── INFO GRID (2-col facts) ── */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px 40px;
}
.info-item-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--klblau);
  margin-bottom: 6px;
  padding-bottom: 5px;
  border-bottom: 2px solid var(--klgelb);
  display: inline-block;
}
.info-item-value {
  font-size: 0.9375rem;
  color: var(--kltext);
  line-height: 1.75;
}

/* ── DISCLAIMER ── */
.disclaimer {
  background: var(--klblauhell);
  border-left: 4px solid var(--klblau);
  padding: 14px 20px;
  font-size: 0.9375rem;
  color: var(--kltext);
  margin-bottom: 32px;
  border-radius: 0 3px 3px 0;
}
.disclaimer strong { color: var(--klblau); }

/* ── BUTTONS ── */
.btn {
  display: inline-block;
  border-radius: 100px;
  padding: 12px 36px;
  border: 2px solid var(--klblau);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--klblau);
  background: #fff;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  letter-spacing: 0.01em;
}
.btn:hover { background: var(--klgelb); color: var(--klblau); border-color: var(--klgelb); text-decoration: none; }
.btn-primary { background: var(--klblau); color: #fff; border-color: var(--klblau); }
.btn-primary:hover { background: var(--klgelb); color: var(--klblau); border-color: var(--klgelb); }

/* ── DOI LINK ── */
.doi-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 14px;
  padding: 7px 18px;
  border: 1px solid var(--klblau);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--klblau);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s;
}
.doi-link:hover { background: var(--klgelb); border-color: var(--klgelb); color: var(--klblau); text-decoration: none; }

/* ── IMAGE CAPTION ── */
.img-caption {
  font-size: 0.85rem;
  color: #777;
  margin-top: 8px;
  line-height: 1.5;
}

/* ── IMPRINT ── */
.imprint-section { margin-bottom: 28px; }
.imprint-heading {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--klblau);
  margin-bottom: 6px;
  padding-bottom: 5px;
  border-bottom: 2px solid var(--klgelb);
  display: inline-block;
}
.imprint-text { font-size: 0.9375rem; color: var(--kltext); line-height: 1.8; }

/* ── STUDY CARDS ── */
.stats-strip {
  background: var(--klblauhell);
  border-left: 4px solid var(--klblau);
  padding: 22px 32px;
  margin-bottom: 32px;
  display: inline-flex;
  gap: 40px;
  align-items: center;
  flex-wrap: wrap;
  border-radius: 0 3px 3px 0;
}
.stat-item { text-align: center; }
.stat-number { font-size: 2.2rem; font-weight: 300; color: var(--klblau); line-height: 1; }
.stat-label { font-size: 0.78rem; color: var(--kltext); margin-top: 4px; line-height: 1.4; }
.stat-divider { width: 1px; height: 46px; background: #b0cfe8; flex-shrink: 0; }

.filter-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 32px; }
.filter-label { font-size: 0.78rem; font-weight: 700; color: #999; letter-spacing: 0.08em; text-transform: uppercase; margin-right: 4px; }
.filter-btn { padding: 7px 18px; border-radius: 100px; border: 2px solid var(--klblau); background: #fff; font-size: 0.875rem; color: var(--klblau); font-weight: 400; cursor: pointer; transition: all 0.2s; }
.filter-btn:hover { background: var(--klgelb); border-color: var(--klblau); }
.filter-btn.active { background: var(--klblau); color: #fff; border-color: var(--klblau); }

.studies-grid { display: flex; flex-direction: column; gap: 28px; }
.study-card {
  background: #fff;
  border: 1px solid #d5e5f0;
  border-top: 3px solid var(--klgelb);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
  transition: box-shadow 0.2s;
  animation: fadeUp .4s ease both;
}
.study-card:hover { box-shadow: 0 4px 18px rgba(37,129,196,.10); }
.study-card.hidden { display: none; }
.study-card.is-new { border-top-color: var(--klblau); }
@keyframes fadeUp { from{opacity:0;transform:translateY(8px)} to{opacity:1;transform:translateY(0)} }
.study-card:nth-child(1){animation-delay:.04s}
.study-card:nth-child(2){animation-delay:.10s}
.study-card:nth-child(3){animation-delay:.16s}
.study-card:nth-child(4){animation-delay:.22s}
.study-card:nth-child(5){animation-delay:.28s}

.card-num { position: absolute; top: 18px; right: 24px; font-size: 4rem; font-weight: 300; color: var(--klblauhell); line-height: 1; pointer-events: none; z-index: 0; }
.card-header { padding: 26px 32px 14px; position: relative; z-index: 1; }
.card-meta-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }

.badge { display: inline-flex; align-items: center; padding: 2px 12px; border-radius: 100px; font-size: 0.73rem; font-weight: 700; letter-spacing: 0.02em; }
.badge-cohort   { background: var(--klblauhell); color: var(--klblau); }
.badge-sr       { background: #cce0f4;            color: #1a5f99; }
.badge-pilot    { background: #e8f3fb;             color: var(--klblau); }
.badge-meta     { background: #fff8d6;             color: #7a5c00; }
.badge-landmark { background: #fff3b8;             color: #6b4f00; }
.badge-new      { background: var(--klblau); color: #fff; animation: pulseBadge 2.5s ease-in-out infinite; }
@keyframes pulseBadge { 0%,100%{opacity:1} 50%{opacity:.7} }
.year-chip { font-size: 0.78rem; color: #aaa; font-weight: 400; margin-left: 2px; }

.card-title { font-size: 1.25rem; font-weight: 400; line-height: 1.35; color: var(--kltext); margin-bottom: 7px; padding-right: 80px; }
.card-authors { font-size: 0.875rem; color: #666; font-style: italic; }
.card-journal { font-size: 0.8rem; color: var(--klblau); font-weight: 700; margin-top: 3px; }

.card-body { padding: 0 32px 26px; position: relative; z-index: 1; }
.card-divider { height: 1px; background: var(--klgrauhell); margin-bottom: 18px; }
.card-content { display: grid; grid-template-columns: 1fr 255px; gap: 26px; }
.section-label { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--klblau); margin-bottom: 9px; padding-bottom: 3px; border-bottom: 2px solid var(--klgelb); display: inline-block; }
.summary-text { font-size: 0.9375rem; color: var(--kltext); line-height: 1.75; }
.findings-list { list-style: none; padding: 0; margin-top: 12px; }
.findings-list li { font-size: 0.9rem; color: var(--kltext); padding: 6px 0; border-bottom: 1px solid var(--klgrauhell); display: flex; align-items: flex-start; gap: 10px; line-height: 1.5; }
.findings-list li:last-child { border-bottom: none; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--klblau); flex-shrink: 0; margin-top: 7px; }

.panel { background: var(--klblauhell); border-radius: 2px; border: 1px solid #c2d8ed; padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.panel-item-label { font-size: 0.72rem; color: #666; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 3px; }
.panel-item-value { font-size: 0.875rem; color: var(--kltext); line-height: 1.5; }
.panel-item-value strong { color: var(--klblau); }

.bar-row { display: flex; align-items: center; gap: 8px; margin-bottom: 3px; }
.bar-row-label { font-size: 0.72rem; color: #888; width: 60px; flex-shrink: 0; text-align: right; }
.bar-track { flex: 1; height: 7px; background: #c2d8ed; border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 4px; background: var(--klblau); width: 0; transition: width .9s cubic-bezier(.16,1,.3,1); }
.bar-fill.red { background: #c0392b; }
.bar-val { font-size: 0.72rem; color: #666; width: 32px; flex-shrink: 0; }

.expand-btn { display: flex; align-items: center; gap: 7px; margin-top: 14px; font-size: 0.875rem; color: var(--klblau); font-weight: 600; padding: 7px 0; cursor: pointer; background: none; border: none; transition: color 0.15s; }
.expand-btn:hover { color: #1a5f99; }
.expand-icon { width: 17px; height: 17px; transition: transform 0.2s; flex-shrink: 0; }
.expand-icon.open { transform: rotate(180deg); }
.detail-panel { display: none; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--klgrauhell); }
.detail-panel.open { display: block; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 30px; }
.detail-item-label { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--klblau); margin-bottom: 3px; padding-bottom: 3px; border-bottom: 1px solid var(--klgelb); }
.detail-item-value { font-size: 0.875rem; color: var(--kltext); line-height: 1.65; }

/* ── FOOTER (KLG-Original) ── */
.footer {
  background: #3d85c8; /* KLG-Original Blau aus Screenshot */
  padding: 56px 0 48px;
  color: #fff;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 220px 1fr 280px;
  gap: 60px;
  align-items: start;
}

/* Footer Col 1: KLG-Rundlogo + Claim */
.footer-logo img {
  width: 160px;
  height: auto;
  display: block;
}
.footer-logo-claim {
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
  margin-top: 20px;
  line-height: 1.55;
}

/* Footer Col 2: Große gelbe Nav-Links */
.footer-nav a {
  display: block;
  padding: 14px 0 12px;
  border-bottom: 2px solid var(--klgelb);
  color: var(--klgelb);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  transition: opacity 0.15s;
}
.footer-nav a:hover { opacity: 0.75; text-decoration: none; }

/* Footer Col 3: Adresse + kleine Links */
.footer-contact-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.footer-contact-address {
  font-size: 0.9rem;
  color: #fff;
  line-height: 1.8;
  margin-bottom: 28px;
}
.footer-contact-address a { color: #fff; font-weight: 400; }
.footer-contact-address a:hover { color: var(--klgelb); text-decoration: none; }

/* Kleine weiße Links (Presse, Medien, Mitglied, Impressum, Datenschutz) */
.footer-links-small a {
  display: block;
  padding: 9px 0 8px;
  border-bottom: 1px solid rgba(255,255,255,.35);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  transition: color 0.15s;
}
.footer-links-small a:hover { color: var(--klgelb); text-decoration: none; }

/* ── BURGER MENU ── */
.burger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px; height: 44px;
  background: none; border: none; cursor: pointer;
  gap: 5px; padding: 4px;
  border-radius: 3px;
  transition: background 0.2s;
  flex-shrink: 0;
}
.burger-btn:hover { background: var(--klblauhell); }
.burger-btn span {
  display: block; width: 26px; height: 2.5px;
  background: var(--klblau); border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
  transform-origin: center;
}
.burger-btn.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.burger-btn.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.burger-btn.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ── MOBILE NAV DRAWER ── */
.mobile-nav { display: none; position: fixed; inset: 0; z-index: 200; }
.mobile-nav.open { display: block; }
.mobile-nav-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.4); }
.mobile-nav-panel {
  position: absolute; top: 0; left: 0; bottom: 0;
  width: 80%; max-width: 340px;
  background: var(--klblau);
  display: flex; flex-direction: column;
  overflow-y: auto;
  box-shadow: 4px 0 24px rgba(0,0,0,0.28);
  animation: slideInLeft 0.25s cubic-bezier(0.16,1,0.3,1);
}
@keyframes slideInLeft { from{transform:translateX(-100%)} to{transform:translateX(0)} }
.mobile-nav-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.2);
}
.mobile-nav-logo { display: flex; align-items: center; gap: 10px; }
.mobile-nav-logo img { height: 50px; width: auto; background: #fff; border-radius: 4px; padding: 4px; }
.mobile-nav-close {
  background: none; border: none; cursor: pointer;
  color: rgba(255,255,255,0.8); padding: 4px;
  display: flex; align-items: center; justify-content: center;
}
.mobile-nav-close:hover { color: var(--klgelb); }
.mobile-nav-links { list-style: none; padding: 8px 0; flex: 1; }
.mobile-nav-links li { border-bottom: 1px solid rgba(255,255,255,0.13); }
.mobile-nav-links a {
  display: block; padding: 14px 24px;
  color: #fff; font-size: 1rem; font-weight: 400; text-decoration: none;
  transition: background 0.15s, padding-left 0.15s;
}
.mobile-nav-links a:hover { background: rgba(255,255,255,0.1); padding-left: 32px; }
.mobile-nav-links a.active { font-weight: 700; background: rgba(255,255,255,0.14); }
.mobile-nav-footer {
  padding: 16px 24px 24px;
  border-top: 1px solid rgba(255,255,255,0.15);
  margin-top: auto;
}
.mobile-nav-footer a {
  display: inline-block; font-size: 0.75rem;
  color: rgba(255,255,255,0.55); text-transform: uppercase;
  letter-spacing: 0.05em; text-decoration: none; margin-right: 16px;
}
.mobile-nav-footer a:hover { color: var(--klgelb); }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  .page-cols { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 200px 1fr 1fr; gap: 32px; }
  .card-content { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .stats-strip { gap: 24px; }
  .stat-divider { display: none; }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 1050px) {
  .btn-mitglied { display: none; }
}
@media (max-width: 900px) {
  .navbar-nav { display: none !important; }
  .burger-btn { display: flex !important; }
}
@media (max-width: 860px) {
  .navbar-brand img { height: 64px; }
  .navbar { min-height: 90px; }
  .navbar .container { min-height: 90px; }
}
@media (max-width: 600px) {
  h1 { font-size: 1.75rem; }
  .hero { height: 160px; }
  .page-title-band { padding: 28px 0 24px; }
  .navbar { min-height: 80px; }
  .navbar .container { min-height: 80px; }
  .navbar-brand img { height: 60px; }
  .kl-card { padding: 22px 18px; }
  .card-header { padding: 18px 18px 12px; }
  .card-body { padding: 0 18px 18px; }
  .card-title { padding-right: 0; font-size: 1.05rem; }
  .card-num { font-size: 3rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}