/* ===========================
   CSS CUSTOM PROPERTIES
   Farben hier zentral ändern
   =========================== */
:root {
  --bg-dark: #ffffff;
  --bg-darker: #f5f7fa;
  --bg-section: #f0f4f8;
  --bg-card: #ffffff;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: rgba(37, 99, 235, 0.08);
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  --border: rgba(37, 99, 235, 0.15);
  --border-light: #e5e7eb;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

/* ===========================
   RESET & BASE
   =========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 88px 24px;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-sub {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 48px;
  max-width: 600px;
}

/* ===========================
   BUTTONS
   =========================== */
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.2s, transform 0.1s;
  border: none;
  cursor: pointer;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }

.btn-secondary {
  display: inline-block;
  border: 2px solid var(--accent);
  color: var(--accent);
  padding: 12px 30px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.2s;
}
.btn-secondary:hover { background: var(--accent-light); }

.btn-nav {
  background: var(--accent);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.2s;
}
.btn-nav:hover { background: var(--accent-hover); }

.btn-card {
  display: inline-block;
  margin-top: 20px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.btn-card:hover { border-color: var(--accent); }

/* ===========================
   NAVIGATION
   =========================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow 0.3s;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-primary); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer;
}

/* ===========================
   HERO
   =========================== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('vortrag_white.png') center center / cover no-repeat;
  opacity: 1;
  z-index: 0;
}

/* Gradient overlay: stark links für Lesbarkeit, leicht von oben für Nav */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.75) 45%, rgba(255,255,255,0.2) 100%),
    linear-gradient(to bottom, rgba(255,255,255,0.3) 0%, transparent 20%);
  z-index: 1;
  pointer-events: none;
}

.hero-inner {
  max-width: 1100px;
  width: 100%;
  padding: 120px 24px 80px;
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 580px;
}

.hero-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

h1 {
  font-size: clamp(2.6rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero-sub {
  color: var(--text-secondary);
  font-size: 1.2rem;
  margin-bottom: 40px;
  max-width: 500px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===========================
   TRUST BAR
   =========================== */
#trust {
  background: var(--bg-card);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.trust-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.trust-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.trust-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 6px;
  max-width: 160px;
}

.trust-divider {
  width: 1px;
  height: 48px;
  background: var(--border-light);
}

/* ===========================
   LEISTUNGEN
   =========================== */
#leistungen {
  background: var(--bg-section);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 1px 8px rgba(0,0,0,0.05);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(37,99,235,0.12);
  border-color: var(--accent);
}

.card-highlight {
  border-color: var(--accent);
  background: linear-gradient(135deg, #ffffff, rgba(37,99,235,0.04));
}

.card-image {
  padding: 0;
  overflow: hidden;
}

.card-img-wrap {
  width: 100%;
  height: 200px;
  overflow: hidden;
  border-radius: var(--radius) var(--radius) 0 0;
}

.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.4s ease;
}

.card-image:hover .card-img-wrap img {
  transform: scale(1.05);
}

.card-body {
  padding: 28px 28px 32px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-body ul {
  flex: 1;
}

.card-image {
  display: flex;
  flex-direction: column;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
  line-height: 1.65;
}

.card ul {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.card ul li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-left: 18px;
  position: relative;
}
.card ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
  top: 1px;
}

/* ===========================
   THEMEN
   =========================== */
#themen {
  background: var(--bg-dark);
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

.topic {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  transition: all 0.2s;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.topic:hover { border-color: var(--accent); color: var(--text-primary); box-shadow: 0 2px 12px rgba(37,99,235,0.08); }

.topic-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 7px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}
.topic-badge.keynote {
  background: rgba(37,99,235,0.1);
  color: var(--accent);
}
.topic-badge.workshop {
  background: rgba(16,185,129,0.1);
  color: #059669;
}

.topics-note {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-style: italic;
  margin-top: 4px;
}

/* ===========================
   ÜBER MICH
   =========================== */
#ueber {
  background: var(--bg-section);
}

.ueber-inner {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 64px;
  align-items: stretch;
}

.ueber-image {
  display: flex;
}

.ueber-image img {
  border-radius: var(--radius);
  width: 100%;
  object-fit: cover;
  object-position: center top;
  box-shadow: 0 8px 40px rgba(0,0,0,0.12);
}

.ueber-text h2 { margin-bottom: 24px; }

.ueber-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.75;
}

.ueber-text p strong { color: var(--text-primary); }

.ueber-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 4px;
}

.ueber-refs {
  margin: 28px 0;
  padding: 20px 24px;
  background: var(--bg-card);
  border-radius: 8px;
  border-left: 3px solid var(--accent);
  box-shadow: 0 1px 6px rgba(0,0,0,0.05);
}

.ueber-refs span {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 12px;
}

.ueber-refs ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ueber-refs li {
  color: var(--text-secondary);
  font-size: 0.92rem;
  padding-left: 14px;
  position: relative;
}
.ueber-refs li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ===========================
   NEWS
   =========================== */
#news {
  background: var(--bg-section);
}

.news-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
}

.news-nav {
  display: flex;
  gap: 10px;
}

.news-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-light);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.news-btn:hover:not(:disabled) {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.news-carousel-wrap {
  overflow: hidden;
}

.news-carousel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 8px rgba(0,0,0,0.05);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  display: flex;
  flex-direction: column;
  color: inherit;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(37,99,235,0.12);
  border-color: var(--accent);
}

.news-img-wrap {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: var(--bg-section);
}
.news-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-img-wrap img {
  transform: scale(1.05);
}

.news-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-date {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.news-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.news-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.news-read {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
}

@media (max-width: 900px) {
  .news-carousel { grid-template-columns: 1fr; }
  .news-header { flex-direction: column; align-items: flex-start; gap: 16px; }
}

/* ===========================
   KONTAKT
   =========================== */
#kontakt {
  background: var(--bg-darker);
}

.kontakt-inner {
  max-width: 640px;
  text-align: center;
}

.kontakt-inner .section-sub {
  margin-left: auto;
  margin-right: auto;
}

#contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 40px;
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

#contact-form input:not([type="checkbox"]),
#contact-form textarea {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 13px 16px;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

#contact-form input:not([type="checkbox"]):focus,
#contact-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.08);
}

#contact-form input:not([type="checkbox"])::placeholder,
#contact-form textarea::placeholder {
  color: var(--text-muted);
}

#contact-form button { align-self: center; margin-top: 4px; }

.datenschutz-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  align-self: stretch;
}
.datenschutz-check input[type="checkbox"] {
  width: auto;
  margin-top: 3px;
  flex-shrink: 0;
  accent-color: var(--accent);
}
.datenschutz-check label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: left;
  cursor: pointer;
  line-height: 1.5;
}
.datenschutz-check a {
  color: var(--accent);
  text-decoration: underline;
}

#form-success p {
  color: var(--accent);
  font-size: 1.1rem;
  margin-top: 24px;
}

.kontakt-links {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 24px;
}

.kontakt-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s;
}
.kontakt-links a:hover { color: var(--accent); }

/* ===========================
   FOOTER
   =========================== */
footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-light);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-inner span {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--text-primary); }

/* ===========================
   OVERLAYS
   =========================== */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.overlay.active {
  display: flex;
}

.overlay-box {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 48px;
  max-width: 680px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.overlay-box h2 {
  margin-bottom: 24px;
}

.overlay-box p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.overlay-box a {
  color: var(--accent);
}

.overlay-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
}
.overlay-close:hover { color: var(--text-primary); }

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 900px) {
  .hero-inner { padding: 100px 24px 60px; }
  .cards { grid-template-columns: 1fr; }
  .ueber-inner { grid-template-columns: 1fr; gap: 40px; }
  .trust-divider { display: none; }
}

@media (max-width: 600px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: #fff;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .topics-grid { grid-template-columns: 1fr; }
}