* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  color: #333;
  background-color: #fff;
  line-height: 1.6;
}

nav {
  display: flex;
  gap: 1.5rem;
  padding: 1rem 2rem;
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}

nav a {
  text-decoration: none;
  color: #003366;
  font-weight: 500;
}

nav a:hover { text-decoration: underline; }

main {
  max-width: 860px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

h1 {
  color: #003366;
  font-size: 4rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

h2 {
  font-size: 1.4rem;
  color: #444;
  margin-top: 35px;
  margin-bottom: 15px;
}

p {
  font-size: 1.1rem;
  margin-bottom: 25px;
}

.galerie {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 20px;
}

.galerie img {
  width: 100%;
  max-width: 420px;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  transition: transform 0.3s ease;
}

.galerie img:hover {
  transform: scale(1.03);
}

.btn {
  display: inline-block;
  margin-top: 30px;
  padding: 12px 30px;
  background-color: #2563eb;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.3s ease;
}

.btn:hover {
  background-color: #1a4aaa;
}

footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.85rem;
  color: #64748b;
  border-top: 1px solid #e2e8f0;
  margin-top: 4rem;
}

/* Logo in Nav */
.nav-logo {
  display: flex;
  align-items: center;
  margin-right: 1rem;
}

.logo {
  height: 40px;
  width: auto;
}

/* Galerien nebeneinander */
.galerien-wrapper {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.slideshow-container {
  flex: 1;
  min-width: 220px;
  max-width: 300px;
}

.slideshow-container h2 {
  margin-bottom: 0.75rem;
}

/* Slideshow */
.slideshow {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.slide {
  display: none;
}

.slide.active {
  display: block;
}

.slide img {
  width: 100%;
  height: 380px;
  object-fit: contain;
  border-radius: 8px;
  display: block;
  background-color: #f0f4f8;
}

.prev, .next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.4);
  color: #fff;
  border: none;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 1.2rem;
  border-radius: 4px;
  transition: background 0.2s;
  z-index: 10;
}

.prev { left: 8px; }
.next { right: 8px; }
.prev:hover, .next:hover { background: rgba(0,0,0,0.7); }

.dots {
  text-align: center;
  padding: 10px 0 6px;
  background: rgba(255,255,255,0.85);
}

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin: 0 4px;
  background: #ccc;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.3s;
}

.dot.active { background: #2563eb; }


/* Notenrechner */
.rechner-box {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 400px;
  margin-top: 2rem;
}

.rechner-feld {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.rechner-feld label {
  font-weight: 600;
  color: #003366;
}

.rechner-feld input {
  padding: 10px 14px;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-size: 1rem;
  outline: none;
}

.rechner-feld input:focus {
  border-color: #2563eb;
}

.ergebnis-box {
  margin-top: 2rem;
  padding: 1.2rem 1.5rem;
  background: #f0f4ff;
  border-left: 4px solid #2563eb;
  border-radius: 6px;
  max-width: 400px;
}

.ergebnis-box p {
  font-size: 1.1rem;
  font-weight: 600;
  color: #003366;
  margin: 0;
}