/* Grundlayout */

:root {
  --bg: #f5f5f5;
  --bg-alt: #ffffff;
  --accent: #1f2933;
  --accent-soft: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --headline: "Georgia", "Times New Roman", serif;
  --body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* Links */

a {
  color: #1d4ed8;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header & Navigation */

.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
}

.top-bar {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.5rem 1.25rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--muted);
}

.masthead {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 1rem;
  border-top: 3px solid var(--accent);
}

.masthead-title {
  font-family: var(--headline);
  font-size: 2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.masthead-subtitle {
  font-size: 0.92rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

/* NAVBAR Desktop */

.main-nav {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: #f9fafb;
}

.main-nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.55rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo a {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
}

.nav-links {
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-links a {
  color: var(--text);
}

.nav-links a.active {
  font-weight: 600;
  border-bottom: 2px solid #1d4ed8;
}

/* Hamburger-Grundelemente (Checkbox & Label) */

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none; /* wird nur auf Mobile eingeblendet */
}

/* Seite allgemein */

.page {
  max-width: 1100px;
  margin: 1.75rem auto 2.5rem;
  padding: 0 1.25rem;
}

.page-section {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 1.5rem 1.5rem 1.75rem;
  margin-bottom: 1.25rem;
}

.section-header {
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.6rem;
}

.section-kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.section-title {
  font-family: var(--headline);
  font-size: 1.4rem;
  margin: 0;
}

.section-subtitle {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 0.3rem;
}

/* Startseite – Hero + Teaser */

.hero {
  display: block;
  margin-top: 0.75rem;
}

.hero-kicker {
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

.hero h1,
.hero h2 {
  font-family: var(--headline);
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
}

.hero-meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.7rem;
}

.hero-lead {
  font-size: 0.96rem;
}

.hero-tag {
  display: inline-block;
  margin-top: 0.7rem;
  padding: 0.12rem 0.6rem;
  font-size: 0.78rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--text);
}

.hero-placeholder {
  background: #e5e7eb;
  border-radius: 4px;
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--muted);
}

.preview-grid {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.preview-card {
  border: 1px solid var(--border);
  background: #f9fafb;
  padding: 1rem 1.1rem;
}

/* Projekte */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}

.project-card {
  border: 1px solid var(--border);
  background: #f9fafb;
  padding: 1rem 1.1rem;
}

/* Texte & Artikel – Liste */

.articles-list {
  display: grid;
  gap: 1rem;
  margin-top: 0.5rem;
}

.article-item {
  padding-top: 0.7rem;
  border-top: 1px solid var(--border);
}

.article-title {
  font-family: var(--headline);
  font-size: 1.05rem;
  margin: 0 0 0.25rem;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.article-teaser {
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.article-link {
  font-size: 0.86rem;
}

/* Buttons / Links im Block */

.button-link {
  display: inline-block;
  margin-top: 0.4rem;
  padding: 0.4rem 0.9rem;
  border-radius: 3px;
  border: 1px solid #1d4ed8;
  background: #1d4ed8;
  color: #ffffff;
  font-size: 0.9rem;
}

.button-link:hover {
  text-decoration: none;
  opacity: 0.95;
}

/* Kontakt */

.contact-details {
  margin-top: 1rem;
  font-size: 0.9rem;
}

/* Bildergalerie am Artikelende */

.article-images {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.article-images h2 {
  font-family: var(--headline);
  font-size: 1.05rem;
  margin: 0 0 0.75rem;
}

.article-images .image-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.article-images figure {
  flex: 1 1 30%;
  margin: 0;
  background: #f9fafb;
  border: 1px solid var(--border);
  padding: 0.4rem;
}

.article-images img {
  display: block;
  width: 100%;
  height: auto;
}

.article-images figcaption {
  margin-top: 0.3rem;
  font-size: 0.8rem;
  color: var(--muted);
}

/* auf kleinen Bildschirmen Bilder untereinander (Galerie) */

@media (max-width: 700px) {
  .article-images figure {
    flex: 1 1 100%;
  }
}

/* Mobile-Optimierung ab ca. 640px Breite */

@media (max-width: 640px) {

  body {
    font-size: 15px;
    line-height: 1.7;
  }

  .page {
    padding: 0 0.9rem;
    margin: 1.25rem auto 2rem;
  }

  .top-bar,
  .masthead {
    padding: 0.5rem 0.9rem;
  }

  .masthead-title {
    font-size: 1.4rem;
    letter-spacing: 0.08em;
  }

  .masthead-subtitle {
    font-size: 0.82rem;
  }

  .page-section {
    padding: 1.1rem 1.1rem 1.3rem;
  }

  .section-title {
    font-size: 1.2rem;
  }

  .hero {
    gap: 0.7rem;
  }

  .hero h1,
  .hero h2 {
    font-size: 1.3rem;
  }

  .preview-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .article-title {
    font-size: 1rem;
  }
}

/* Mobile Navigation (Hamburger) ab 700px und kleiner */

@media (max-width: 700px) {
  .main-nav-inner {
    padding: 0.5rem 0.9rem;
    position: relative;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #f9fafb;
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease-out;
  }

  .nav-links a {
    padding: 0.55rem 0.9rem;
    border-top: 1px solid var(--border);
  }

  .nav-links a.active {
    background: #e5edff;
    border-bottom: 2px solid #1d4ed8;
  }

  /* Hamburger-Icon anzeigen */

  .nav-toggle-label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    cursor: pointer;
  }

  .nav-toggle-label span,
  .nav-toggle-label span::before,
  .nav-toggle-label span::after {
    display: block;
    background: #111827;
    height: 2px;
    width: 20px;
    border-radius: 1px;
    position: relative;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .nav-toggle-label span::before,
  .nav-toggle-label span::after {
    content: "";
    position: absolute;
    left: 0;
  }

  .nav-toggle-label span::before {
    top: -6px;
  }

  .nav-toggle-label span::after {
    top: 6px;
  }

  /* Menü aufklappen, wenn Checkbox aktiv ist */

  .nav-toggle:checked ~ .nav-links {
    max-height: 500px;
  }

  /* Hamburger zu X animieren */

  .nav-toggle:checked + .nav-toggle-label span {
    transform: rotate(45deg);
  }

  .nav-toggle:checked + .nav-toggle-label span::before {
    transform: rotate(90deg);
    top: 0;
  }

  .nav-toggle:checked + .nav-toggle-label span::after {
    opacity: 0;
  }
}