body {
  font-family: 'Roboto', sans-serif;
  background: #f4f6f8;
  margin: 0;
  padding: 0;
  color: #333;
  scroll-behavior: smooth;
}

h1, h2, h3 {
  margin: 0;
  padding: 0;
  line-height: 1.2;
}

h1 {
  font-size: 44px;
  color: steelblue;
  margin-bottom: 15px;
}

h2 {
  font-size: 36px;
  text-align: center;
  color: steelblue;
  margin-bottom: 35px;
}

h3 {
  font-size: 22px;
  color: #2C3E50;
  margin-bottom: 12px;
}

header {
  background: rgb(44, 62, 80);
  padding: 20px;
  position: sticky;
  top: 0;
  z-index: 1000;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

header .logo {
  color: white;
  font-size: 26px;
  font-weight: bold;
  margin-bottom: 10px;
}

header nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

header nav li {
  display: inline-block;
  margin: 0 15px;
}

header nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

header nav a:hover {
  color: skyblue;
}

.top-banner {
  background: radial-gradient(circle, rgba(44, 62, 80, 0.9) 20%, rgba(44, 62, 80, 0) 100%);
  color: #f0dfb7;
  text-align: center;
  padding: 0.4rem;
  font-size: 1rem;
}

.top-banner u {
  text-decoration: underline;
  cursor: pointer;
}

.hero {
  background: linear-gradient(to right, #2C3E50, #34495E);
  color: whitesmoke;
  text-align: center;
  padding: 80px 20px 60px;
}

.hero h3 {
  color: skyblue;
}

.hero p {
  font-size: 18px;
  margin: 20px 0 35px;
}

.btn {
  display: inline-block;
  background: steelblue;
  color: white;
  padding: 12px 25px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
}

.btn:hover {
  background: skyblue;
}

.btn::after {
  content: "➔";
  margin-left: 8px;
  transition: transform 0.3s ease;
}

.btn:hover::after {
  transform: translateX(8px);
}

.section {
  padding: 60px 20px;
  background: #fff;
  margin-bottom: 50px;
}

.container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.photo {
  width: 45%;
  text-align: center;
}

.photo img {
  width: 70%;
  border-radius: 12px;
  transition: transform 0.8s;
}

.photo img:hover {
  cursor: zoom-in;
  transform: scale(1.4);
}

.content {
  width: 50%;
}

.content h2 {
  font-size: 26px;
  color: steelblue;
  margin-bottom: 15px;
}

.content p {
  font-size: 16px;
  line-height: 1.7;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.project {
  background: #ecf0f1;
  padding: 30px 20px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.15);
}

.project h3 {
  font-size: 21px;
  margin-bottom: 10px;
}

.two-boxes,
.three-boxes {
  display: grid;
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.two-boxes {
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.three-boxes {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.box {
  background: #ecf0f1;
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.box:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.15);
}

form {
  max-width: 700px;
  margin: 0 auto 60px;
  display: flex;
  flex-direction: column;
  gap: 15px;
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

form label {
  font-weight: bold;
  color: #2C3E50;
}

form input,
form textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 15px;
}

form textarea {
  min-height: 120px;
  resize: vertical;
}

form button {
  background: steelblue;
  color: white;
  border: none;
  padding: 12px 20px;
  font-size: 16px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: bold;
  transition: 0.3s;
}

form button:hover {
  background: skyblue;
}

.datenschutz-box {
  margin-top: 1rem;
  line-height: 1.5;
  font-size: 0.95rem;
}

.datenschutz-box label {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.datenschutz-box input[type="checkbox"] {
  margin-top: 0.3rem;
}

.datenschutz-box a {
  color: #0066cc;
  text-decoration: none;
}

.datenschutz-box a:hover {
  text-decoration: underline;
}

.alert {
  text-align: center;
  padding: 0.8rem 1rem;
  margin-bottom: 1rem;
  border-radius: 6px;
  font-weight: 500;
}

.alert.error {
  background: #ffe5e5;
  border: 1px solid #ff4d4d;
  color: #d00000;
}

.alert.success {
  background: #e6ffea;
  border: 1px solid #2ecc71;
  color: #187a3e;
}

footer {
  background: #2C3E50;
  color: white;
  text-align: center;
  padding: 25px;
  font-size: 15px;
}

footer a {
  color: skyblue;
  text-decoration: none;
  margin: 0 10px;
}

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

hr.style-schatten {
  height: 12px;
  border: 0;
  box-shadow: inset 0 12px 12px -12px rgba(0,0,0,0.5);
  margin: 20px 0;
}

hr.style-fein {
  border: 0;
  height: 3px;
  background: linear-gradient(to right, transparent, steelblue, transparent);
  margin: 1.5rem 0;
}

hr.style-fein2 {
  height: 15px;
  border: 0;
  box-shadow: inset 0 15px 15px -15px rgba(0,0,0,0.5);
  margin: 0.01rem 0;
}

@media (max-width: 1024px) {
  .container {
    flex-direction: column;
    text-align: center;
  }
  .photo, .content {
    width: 100%;
  }
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 34px;
  }
  .section {
    padding: 40px 15px;
  }
  .two-boxes,
  .three-boxes {
    grid-template-columns: 1fr;
  }
  form button {
    width: 100%;
  }
}