/* Modernes, kontrastreiches Dark-Theme mit Industrieblau (#006699) als Akzentfarbe */

:root {
  --background-dark: #181a1b;
  --background-darker: #121314;
  --text-light: #fff;
  --text-medium: #e0e3e7;
  --accent-blue: #0094e0;
  --accent-blue-light: #00cfff;
  --accent-blue-dark: #006699;
  --shadow: rgba(0, 0, 0, 0.25);
  --error: #ff4d4f;
  --success: #00c48c;
}

body {
  background-color: var(--background-dark);
  color: var(--text-light);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.7;
  margin: 0;
  padding: 0;
  font-size: 1.15rem;
}

header {
  background-color: var(--background-darker);
  box-shadow: 0 2px 8px var(--shadow);
}

.nav-logo {
  display: flex;
  align-items: center;
  margin-right: 1.5rem;
  margin-left: 2rem;
  padding: 0.8rem 0;
  flex-shrink: 0;
}

.nav-logo img {
  object-fit: contain;
  display: block;
  width: 110px;
  height: 110px;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 2rem;
  width: 100%;
}

.nav-list {
  flex: 1;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list li a {
  text-decoration: none;
  color: var(--text-light);
  font-weight: 700;
  font-size: 1.25rem;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  transition: background-color 0.2s, color 0.2s;
  background: transparent;
  outline: none;
  user-select: none;
  -webkit-user-select: none; /* Für Safari */
  -ms-user-select: none;     /* Für IE/Edge */
}

.nav-list li a:hover,
.nav-list li a:focus {
  background-color: var(--accent-blue-dark);
  color: #fff;
}

main {
  padding: 2rem;
  max-width: 1200px;
  margin: auto;
}

section h1 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
  color: var(--accent-blue);
  text-align: center;
  letter-spacing: 0.01em;
}

section h2 {
  color: var(--accent-blue-light);
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  font-size: 1.5rem;
}

section p {
  margin-bottom: 1rem;
  font-size: 1.15rem;
  color: var(--text-light);
}

section ul {
  margin: 0 0 1rem 1.5rem;
  padding-left: 1.2em;
}

section a {
  color: var(--accent-blue-light);
  text-decoration: underline;
  font-weight: 600;
  transition: color 0.2s;
}
section a:hover,
section a:focus {
  color: var(--accent-blue);
}

footer {
  background-color: var(--background-darker);
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
  font-size: 1rem;
  color: var(--text-medium);
}

.footer-links {
  text-align: center;
  margin: 0.5rem 0;
}
.footer-link {
  color: var(--accent-blue-light);
  text-decoration: underline;
  margin: 0 0.5rem;
  font-size: 1rem;
}
.footer-link:hover,
.footer-link:focus {
  color: var(--accent-blue);
}

/* STL Viewer */
.viewer-container {
  width: 100%;
  margin-top: 2rem;
  border: 2px solid var(--accent-blue);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-bottom: 2rem;
  padding: 2rem 1rem;
  background: var(--background-darker);
}

.viewer-container > p {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 1rem;
  letter-spacing: 0.01em;
}

/* STL-Viewer Canvas sichtbar machen */
.stl-viewer {
  width: 100%;
  max-width: 700px;
  height: 420px;
  min-height: 250px;
  margin: 1.5rem auto;
  display: block;
  background: var(--background-darker);
  border-radius: 8px;
  box-shadow: none;
  border: none;
  box-sizing: border-box;
}

/* Kontaktformular */
.kontakt-formular {
  background: var(--background-darker);
  border: 2px solid var(--accent-blue);
  border-radius: 10px;
  max-width: 500px;
  margin: 2rem auto;
  padding: 2rem 2.5rem 1.5rem 2.5rem;
  box-shadow: 0 4px 24px var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.kontakt-formular label {
  color: var(--accent-blue-light);
  font-weight: 600;
  margin-bottom: 0.3rem;
  letter-spacing: 0.02em;
}

.kontakt-formular input,
.kontakt-formular textarea {
  background: #181a1b;
  color: #fff;
  border: 2px solid var(--accent-blue);
  border-radius: 6px;
  padding: 0.7rem 1rem;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  resize: vertical;
}

.kontakt-formular input:focus,
.kontakt-formular textarea:focus {
  border-color: var(--accent-blue-light);
  box-shadow: 0 0 0 2px var(--accent-blue-light);
}

.kontakt-formular button[type="submit"] {
  background: var(--accent-blue);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.8rem 1.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: background 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 8px var(--shadow);
}

.kontakt-formular button[type="submit"]:hover,
.kontakt-formular button[type="submit"]:focus {
  background: var(--accent-blue-light);
}

.kontakt-formular textarea {
  min-height: 120px;
  max-height: 300px;
}

.kontakt-formular p {
  color: var(--error);
  margin-top: 1rem;
  text-align: center;
}

/* Printed Slider */
.printed-slider {
  position: relative;
  width: 96vw;
  max-width: 1000px;
  aspect-ratio: 16/9;
  margin: 2rem auto 0 auto;
  border-radius: 16px;
  box-shadow: 0 4px 32px var(--shadow);
  background: var(--background-darker);
  border: 2px solid var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 0;
  min-width: 0;
}

.slider-btn {
  background: none;
  color: var(--accent-blue-light);
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s, color 0.2s;
  box-shadow: none;
  outline: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.slider-btn:hover,
.slider-btn:focus {
  opacity: 1;
  color: var(--accent-blue);
}
.slider-btn.prev {
  margin-left: 32px;
  margin-right: 24px;
}
.slider-btn.next {
  margin-right: 32px;
  margin-left: 24px;
}

.slider-img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16/9;
  min-width: 0;
  min-height: 0;
  max-width: 100%;
  max-height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.7s cubic-bezier(.4,0,.2,1);
  z-index: 1;
  border-radius: 12px;
  display: none;
}
.slider-img.active {
  opacity: 1;
  z-index: 2;
  display: block;
}

/* Hero Logo */
.hero-logo {
  display: block;
  margin: 2rem auto 1.5rem auto;
  max-width: 220px;
  width: 60vw;
  height: auto;
}

/* Intro Section */
.intro {
  margin-top: 2rem;
  background-color: var(--background-darker);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 8px var(--shadow);
}

.intro h1 {
  color: var(--accent-blue);
  margin-bottom: 1rem;
  font-size: 2rem;
}

.intro p {
  line-height: 1.6;
  margin-bottom: 1rem;
  font-size: 1.1rem;
  color: var(--text-light);
}

/* Responsive Design */
/* === Desktop (ab 901px) === */
@media (min-width: 901px) {
  .main-nav {
    flex-direction: row;
    gap: 2rem;
    padding: 0;
  }
  .nav-logo img {
    width: 110px;
    height: 110px;
  }
  .nav-list li a {
    font-size: 1.35rem;
    padding: 0.8rem 2rem;
  }
  section h1 {
    font-size: 2.7rem;
  }
  .printed-slider {
    width: 96vw;
    max-width: 1000px;
    aspect-ratio: 16/9;
    border-radius: 16px;
  }
}

/* === Tablet (601px bis 900px) === */
@media (max-width: 1200px) and (min-width: 601px) {
  .main-nav {
    flex-direction: column;
    align-items: center;
  }
  .nav-list {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0;
  }
  .nav-list li {
    flex: 1 1 45%;
    min-width: 120px;
    text-align: center;
    margin: 0.2rem 0;
  }
  .nav-list li a {
    width: 100%;
    box-sizing: border-box;
    display: block;
    padding: 0.7rem 0.5rem;
    font-size: 1.15rem;
  }
  section h1 {
    font-size: 2rem;
  }
  .printed-slider {
    width: 98vw;
    max-width: 98vw;
    aspect-ratio: 16/10;
    border-radius: 12px;
  }
  .hero-logo {
    max-width: 160px;
  }
  main {
    padding: 1rem;
  }
  section {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

/* === Smartphone (bis 600px) === */
@media (max-width: 600px) {
  .main-nav {
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    padding: 0.5rem 0;
  }
  .nav-logo {
    margin: 0;
    padding: 0.5rem 0;
  }
  .nav-logo img {
    width: auto;
    height: 48px;
  }
  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    width: 100%;
  }
  .nav-list li a {
    display: block;
    width: 100%;
    max-width: 320px;
    text-align: center;
    margin: 0 auto;
    font-size: 1.05rem;
    padding: 0.5rem 0.5rem;
  }
  section h1 {
    font-size: 1.5rem;
  }
  .printed-slider {
    width: 100%;
    max-width: 100%;
    aspect-ratio: 16/11;
    border-radius: 8px;
  }
  .slider-img {
    border-radius: 6px;
  }
  .hero-logo {
    max-width: 90px;
    margin: 1rem auto;
  }
  main {
    padding: 0.5rem 0;
  }
  section, .intro, .viewer-container {
    padding-left: 0.7rem;
    padding-right: 0.7rem;
  }
  .viewer-container {
    width: auto;
    box-sizing: border-box;
    padding-top: 1rem;
    padding-bottom: 1rem;
    padding-left: 0.7rem;
    padding-right: 0.7rem;
  }
  .stl-viewer {
    width: 100%;
    max-width: 100vw;
    height: 280px;
    min-height: 120px;
  }
}

/* Fokus-Styles für Barrierefreiheit */
a:focus, button:focus, input:focus, textarea:focus {
  outline: 2px solid var(--accent-blue-light);
  outline-offset: 2px;
}