/* ============================================================
   Vermessungsbüro Möller – Hauptstylesheet
   WCAG 2.1 AA konform
   ============================================================ */

/* === RESET & CUSTOM PROPERTIES === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-primary:       #003f7e;
  --color-primary-dark:  #002655;
  --color-primary-light: #1a5fa8;
  --color-accent:        #0077cc;
  --color-accent-light:  #ddeeff;
  --color-text:          #1a1a1a;
  --color-text-muted:    #4a4a4a;
  --color-bg:            #ffffff;
  --color-surface:       #f2f6fb;
  --color-border:        #c5d5e8;
  --font-main: 'Segoe UI', system-ui, -apple-system, Arial, sans-serif;
  --radius:   8px;
  --radius-lg: 12px;
  --shadow:    0 2px 12px rgba(0,40,100,.10);
  --shadow-lg: 0 6px 28px rgba(0,40,100,.16);
  --transition: .2s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
}

/* === ACCESSIBILITY UTILITIES === */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; top: -100%; left: 0;
  padding: .75rem 1.5rem;
  background: var(--color-primary); color: #fff;
  font-weight: 700; font-size: 1rem;
  z-index: 9999; text-decoration: none;
  border-radius: 0 0 var(--radius) 0;
  transition: top var(--transition);
}
.skip-link:focus { top: 0; }

*:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* === LAYOUT HELPERS === */
.container { max-width: 1200px; margin: 0 auto; }

/* === SITE HEADER & NAVIGATION === */
.site-header {
  background: var(--color-primary);
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,.25);
}

.nav-container {
  max-width: 1200px; margin: 0 auto;
  padding: 0 1.5rem;
  display: flex; align-items: center;
  justify-content: space-between;
  min-height: 175px; gap: 1rem;
}

.site-logo {
  color: #fff; text-decoration: none;
  display: flex; flex-direction: column;
  line-height: 1.25; flex-shrink: 0; gap: .08rem;
}
.logo-l1 { font-size: 1.6rem; font-weight: 700; }
.logo-l2 { font-size: 1.6rem; font-weight: 400; }
.logo-l3 { font-size: 1.2rem; font-weight: 400; opacity: .85; }

.nav-menu {
  display: flex; gap: .45rem;
  list-style: none; flex-wrap: wrap;
}
.nav-menu a {
  display: block; padding: .45rem 1.1rem;
  color: #fff; text-decoration: none;
  border-radius: var(--radius); font-size: .9rem; font-weight: 600;
  white-space: nowrap;
  background: linear-gradient(180deg, #2a6dbf 0%, #1a4f99 60%, #123b7a 100%);
  border-top:    1px solid rgba(255,255,255,.40);
  border-left:   1px solid rgba(255,255,255,.25);
  border-right:  1px solid rgba(0,0,0,.35);
  border-bottom: 3px solid rgba(0,0,0,.45);
  box-shadow: 0 3px 6px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.20);
  transition: transform .1s ease, box-shadow .1s ease, border-bottom-width .1s ease;
  user-select: none;
}
.nav-menu a:hover {
  background: linear-gradient(180deg, #3a7dd0 0%, #2560ad 60%, #1a4f99 100%);
  box-shadow: 0 4px 8px rgba(0,0,0,.40), inset 0 1px 0 rgba(255,255,255,.25);
}
.nav-menu a:focus {
  outline: 3px solid var(--color-accent); outline-offset: 2px;
}
.nav-menu a:active {
  transform: translateY(2px);
  border-bottom-width: 1px;
  box-shadow: 0 1px 3px rgba(0,0,0,.35), inset 0 2px 4px rgba(0,0,0,.20);
}
.nav-menu a[aria-current="page"],
.nav-menu a[aria-current="true"] {
  background: linear-gradient(180deg, #1a4f99 0%, #123b7a 100%);
  border-top: 1px solid rgba(0,0,0,.30);
  border-bottom: 1px solid rgba(0,0,0,.20);
  box-shadow: inset 0 2px 5px rgba(0,0,0,.30);
  transform: translateY(1px);
}

.nav-toggle {
  display: none; background: none;
  border: 2px solid rgba(255,255,255,.65);
  color: #fff; padding: .45rem .7rem;
  border-radius: var(--radius);
  cursor: pointer; font-size: 1.3rem; line-height: 1;
  transition: background var(--transition);
}
.nav-toggle:hover { background: rgba(255,255,255,.15); }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="false"] .icon-close { display: none; }

/* === HERO === */
.hero {
  background-image: url('Hintergrund.jpg');
  background-size: cover; background-position: center;
  min-height: 460px;
  display: flex; align-items: center;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg,
    rgba(0,38,85,.82) 0%,
    rgba(0,70,148,.52) 60%,
    rgba(0,119,204,.28) 100%);
}
.hero-content {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 0 auto;
  padding: 4rem 1.5rem; color: #fff;
}
.hero-content h1 {
  font-size: clamp(1.65rem, 4.5vw, 2.75rem);
  font-weight: 800; line-height: 1.2;
  margin-bottom: .75rem;
}
.hero-content p {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  max-width: 600px; opacity: .93;
  margin-bottom: 2rem; line-height: 1.6;
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* === BUTTONS === */
.btn {
  display: inline-block; padding: .75rem 1.8rem;
  border-radius: var(--radius);
  font-weight: 700; font-size: 1rem;
  text-decoration: none; cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn-primary {
  background: #fff; color: var(--color-primary);
  border-color: #fff;
}
.btn-primary:hover, .btn-primary:focus {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,.22);
}
.btn-outline {
  background: transparent;
  color: #fff; border-color: #fff;
}
.btn-outline:hover, .btn-outline:focus {
  background: rgba(255,255,255,.18);
}
.btn-blue {
  background: var(--color-accent); color: #fff;
  border-color: var(--color-accent);
}
.btn-blue:hover, .btn-blue:focus {
  background: #005fa3; border-color: #005fa3;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,.2);
}

/* === SECTION LAYOUT === */
.section { padding: 4.5rem 1.5rem; }
.section-alt { background: var(--color-surface); }

.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-label {
  display: inline-block;
  background: var(--color-accent-light);
  color: var(--color-primary);
  padding: .3rem 1.1rem; border-radius: 100px;
  font-size: .82rem; font-weight: 700;
  letter-spacing: .07em; text-transform: uppercase;
  margin-bottom: .9rem;
}
.section-header h2 {
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  color: var(--color-primary-dark);
  margin-bottom: .9rem; line-height: 1.25;
}
.section-header p {
  color: var(--color-text-muted);
  max-width: 660px; margin: 0 auto;
  font-size: 1.05rem;
}
.section-divider {
  border: none;
  border-top: 3px solid var(--color-accent);
  width: 56px; margin: 0 auto 1rem;
}

/* === SERVICE CARDS GRID === */
.service-grid {
  display: grid; gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
}

/* === SERVICE CARD === */
.service-card {
  background: #fff; border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow);
  display: flex; flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
  border: 1px solid var(--color-border);
}
.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

/* === IMAGE GALLERY === */
.service-gallery {
  position: relative; overflow: hidden;
  height: 230px; background: var(--color-surface);
  flex-shrink: 0;
}
.service-gallery img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .45s ease;
}
.service-gallery img.active { opacity: 1; }

.gallery-nav-dots {
  position: absolute; bottom: .6rem; left: 50%;
  transform: translateX(-50%);
  display: flex; gap: .45rem; z-index: 2;
}
.gallery-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: rgba(255,255,255,.55);
  border: none; cursor: pointer; padding: 0;
  transition: background var(--transition), transform var(--transition);
}
.gallery-dot.active,
.gallery-dot:hover { background: #fff; transform: scale(1.25); }

.gallery-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(0,0,0,.42); color: #fff;
  border: none; width: 36px; height: 36px;
  border-radius: 50%; cursor: pointer;
  font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  z-index: 2;
  transition: background var(--transition);
}
.gallery-btn:hover, .gallery-btn:focus { background: rgba(0,0,0,.72); }
.gallery-prev { left: .6rem; }
.gallery-next { right: .6rem; }

/* === SERVICE BODY === */
.service-body {
  padding: 1.6rem; flex: 1;
  display: flex; flex-direction: column; gap: .5rem;
}
.service-icon { font-size: 2rem; line-height: 1; }
.service-body h3 {
  font-size: 1.1rem; font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.3;
}
.service-body p {
  color: var(--color-text-muted);
  font-size: .95rem; line-height: 1.65; flex: 1;
}

/* === SUBSECTION HEADER (Baubegleitende Vermessungen) === */
.subsection-header {
  margin: 0 0 2rem;
  padding: 1.2rem 1.4rem;
  background: #fff;
  border-left: 5px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow);
}
.subsection-header h3 {
  font-size: 1.2rem; font-weight: 700;
  color: var(--color-primary);
}
.subsection-header p {
  color: var(--color-text-muted);
  font-size: .95rem; margin-top: .35rem;
}

/* === CONTACT STRIP === */
.contact-strip {
  background: var(--color-primary);
  color: #fff; padding: 4rem 1.5rem;
  text-align: center;
}
.contact-strip h2 {
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  margin-bottom: .6rem;
}
.contact-strip p { opacity: .9; margin-bottom: 1.8rem; font-size: 1.05rem; }

/* === SITE FOOTER === */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,.8);
  padding: 2rem 1.5rem; text-align: center;
  font-size: .9rem;
}
.site-footer a { color: rgba(255,255,255,.9); text-decoration: underline; }
.site-footer a:hover, .site-footer a:focus { color: #fff; }

/* === PAGE HERO (Kontakt & Impressum) === */
.page-hero {
  background: var(--color-primary);
  color: #fff; padding: 3.5rem 1.5rem;
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 800; margin-bottom: .5rem;
}
.page-hero p { opacity: .88; font-size: 1.05rem; }

/* === PAGE CONTENT === */
.page-content {
  max-width: 860px; margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* === CONTACT CARD === */
.contact-info-grid {
  display: grid; gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-bottom: 2.5rem;
}
.info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  box-shadow: var(--shadow);
}
.info-card h2 {
  font-size: 1rem; font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--color-accent-light);
}
.info-item {
  display: flex; gap: .75rem;
  align-items: flex-start; margin-bottom: .7rem;
  font-size: .97rem;
}
.info-item:last-child { margin-bottom: 0; }
.info-icon { font-size: 1.15rem; flex-shrink: 0; margin-top: .1rem; }
.info-item address { font-style: normal; line-height: 1.6; }
.info-item a { color: var(--color-accent); text-decoration: none; }
.info-item a:hover, .info-item a:focus { text-decoration: underline; }

/* === CONTACT FORM === */
.contact-form-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem; box-shadow: var(--shadow);
  margin-bottom: 2.5rem;
}
.contact-form-wrap h2 {
  font-size: 1.15rem; color: var(--color-primary);
  margin-bottom: 1.5rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--color-accent-light);
}
.form-grid {
  display: grid; gap: 1.2rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.form-field { display: flex; flex-direction: column; gap: .35rem; }
.form-field.full { grid-column: 1 / -1; }
.form-field label {
  font-size: .92rem; font-weight: 600;
  color: var(--color-primary-dark);
}
.form-field label .required { color: #c0392b; margin-left: .2rem; }
.form-field input,
.form-field textarea,
.form-field select {
  padding: .65rem .9rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-main); font-size: .97rem;
  color: var(--color-text); background: #fff;
  transition: border-color var(--transition);
  width: 100%;
}
.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus { border-color: var(--color-accent); outline: none; }
.form-field textarea { min-height: 140px; resize: vertical; }
.form-feedback {
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  font-size: .95rem;
  line-height: 1.5;
}
.form-feedback--ok {
  background: #e8f7ee;
  border: 1px solid #6abf85;
  color: #1a5c33;
}
.form-feedback--err {
  background: #fdecea;
  border: 1px solid #e07070;
  color: #7a1f1f;
}
.form-note { font-size: .85rem; color: var(--color-text-muted); margin-top: 1rem; }
.form-submit { margin-top: 1.2rem; }

/* === MAP === */
.map-wrap {
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid var(--color-border);
}
.map-wrap iframe { display: block; width: 100%; height: 360px; border: 0; }

/* === IMPRESSUM === */
.impressum-section { margin-bottom: 2rem; }
.impressum-section h2 {
  font-size: 1.05rem; font-weight: 700;
  color: var(--color-primary);
  padding-bottom: .4rem; margin-bottom: .6rem;
  border-bottom: 2px solid var(--color-border);
}
.impressum-section p,
.impressum-section address {
  font-style: normal; line-height: 1.75;
  color: var(--color-text); font-size: .97rem;
}
.impressum-section a { color: var(--color-accent); }

/* === RESPONSIVE === */
@media (max-width: 800px) {
  .nav-toggle { display: flex; align-items: center; }
  #main-nav {
    position: absolute; top: 175px; left: 0; right: 0;
    background: var(--color-primary-dark);
    display: none; padding: .5rem 1rem 1rem;
  }
  #main-nav.open { display: block; }
  .nav-menu { flex-direction: column; gap: .4rem; }
  .nav-menu a { font-size: 1rem; padding: .75rem 1.1rem; }
  .service-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-content { padding: 3rem 1rem; }
  .section { padding: 3rem 1rem; }
  .page-content { padding: 2rem 1rem 3rem; }
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .service-gallery img { transition: none; }
}

/* === PRINT === */
@media print {
  .site-header, .hero-cta, .contact-strip,
  .gallery-btn, .gallery-nav-dots { display: none !important; }
  .service-card { break-inside: avoid; }
  .service-gallery { height: 180px; }
  .service-gallery img { position: static; opacity: 1; height: 180px; }
  .service-gallery img:not(.active) { display: none; }
}

/* ============================================================
   DETAIL PAGES (Unterseiten)
   ============================================================ */

/* --- Card-Footer & Link (index.html) --- */
.card-footer {
  margin-top: 1rem; padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}
.card-link {
  display: inline-flex; align-items: center; gap: .45rem;
  color: var(--color-accent); text-decoration: none;
  font-size: .92rem; font-weight: 600;
  transition: gap var(--transition);
}
.card-link:hover, .card-link:focus { gap: .8rem; text-decoration: underline; }
.card-link-arrow { display: inline-block; transition: transform var(--transition); }
.card-link:hover .card-link-arrow { transform: translateX(3px); }

/* --- Detail Hero --- */
.detail-hero {
  background-image: url('Hintergrund.jpg');
  background-size: cover; background-position: center;
  min-height: 320px;
  display: flex; flex-direction: column; justify-content: flex-end;
  position: relative; overflow: hidden;
}
.detail-hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(160deg,
    rgba(0,40,85,.60) 0%,
    rgba(0,40,85,.88) 100%);
}
.detail-hero-content {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 0 auto; width: 100%;
  padding: 1.5rem 1.5rem 2.5rem; color: #fff;
}
.section-tag {
  display: inline-block;
  background: rgba(255,255,255,.2);
  border: 1px solid rgba(255,255,255,.38);
  color: #fff; padding: .25rem .95rem;
  border-radius: 100px; font-size: .78rem;
  font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  margin-bottom: .65rem;
}
.breadcrumb {
  display: flex; align-items: center; gap: .4rem;
  font-size: .85rem; opacity: .82; margin-bottom: .7rem; flex-wrap: wrap;
  list-style: none; padding: 0;
}
.breadcrumb li { display: flex; align-items: center; gap: .4rem; }
.breadcrumb a { color: rgba(255,255,255,.9); text-decoration: none; }
.breadcrumb a:hover, .breadcrumb a:focus { text-decoration: underline; }
.breadcrumb-sep { opacity: .5; }
.detail-hero-content h1 {
  font-size: clamp(1.6rem, 4vw, 2.55rem);
  font-weight: 800; line-height: 1.2; margin-bottom: .5rem;
}
.hero-subtitle {
  font-size: 1.05rem; opacity: .9; max-width: 640px; line-height: 1.55;
}

/* --- Sub-Navigation --- */
.service-subnav {
  background: var(--color-primary-dark);
  border-bottom: 3px solid var(--color-accent);
  position: sticky; top: 175px; z-index: 90;
}
.subnav-scroll {
  max-width: 1200px; margin: 0 auto;
  padding: 0 1rem;
  display: flex; overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.subnav-scroll::-webkit-scrollbar { display: none; }
.subnav-scroll a {
  display: flex; align-items: center; gap: .45rem;
  padding: .75rem 1rem;
  color: rgba(255,255,255,.75); text-decoration: none;
  font-size: .87rem; white-space: nowrap;
  border-bottom: 3px solid transparent; margin-bottom: -3px;
  transition: color var(--transition), border-color var(--transition);
}
.subnav-scroll a:hover { color: #fff; }
.subnav-scroll a.active {
  color: #fff; font-weight: 700;
  border-bottom-color: var(--color-accent);
}
.subnav-icon { font-size: .9rem; }

/* --- Detail Section Layout --- */
.detail-section { padding: 3.5rem 1.5rem; }
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 285px;
  gap: 3rem; align-items: start;
}

/* --- Image Grid --- */
.img-grid {
  display: grid; gap: 1rem; margin: 2rem 0;
}
.img-grid.cols-1 { grid-template-columns: 1fr; }
.img-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.img-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.img-grid.auto   { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.img-grid figure { margin: 0; }
.img-grid img {
  width: 100%; height: 260px; object-fit: cover;
  border-radius: var(--radius); box-shadow: var(--shadow); display: block;
  transition: transform var(--transition), box-shadow var(--transition);
}
.img-grid img:hover { transform: scale(1.018); box-shadow: var(--shadow-lg); }
.img-grid figcaption {
  font-size: .82rem; color: var(--color-text-muted);
  margin-top: .3rem; padding: 0 .15rem;
}
.img-featured { grid-column: 1 / -1; }
.img-featured img { height: 380px; }

/* --- Detail Content --- */
.detail-intro {
  font-size: 1.1rem; line-height: 1.75; color: var(--color-text);
  margin-bottom: 1.5rem; padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-border);
}
.detail-body h2 {
  font-size: 1.1rem; font-weight: 700; color: var(--color-primary);
  margin: 1.8rem 0 .6rem;
  padding-bottom: .35rem;
  border-bottom: 2px solid var(--color-accent-light);
}
.detail-body p  { margin-bottom: .8rem; color: var(--color-text); line-height: 1.72; }
.detail-body ul { margin: .4rem 0 .8rem 1.3rem; color: var(--color-text); line-height: 1.85; }
.detail-body li { margin-bottom: .2rem; }

/* --- Highlight Box --- */
.highlight-box {
  background: var(--color-accent-light);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.1rem 1.4rem; margin: 1.5rem 0;
}
.highlight-box p { margin: 0; color: var(--color-primary-dark); line-height: 1.65; }
.highlight-box strong { color: var(--color-primary); }

/* --- Process Steps --- */
.process-steps { margin: 1rem 0 1.5rem; }
.process-step {
  display: flex; gap: 1rem; align-items: flex-start;
  padding: .9rem 0; border-bottom: 1px solid var(--color-border);
}
.process-step:last-child { border-bottom: none; }
.step-num {
  background: var(--color-primary); color: #fff;
  width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .9rem;
}
.step-body h4 { font-size: .97rem; color: var(--color-primary-dark); margin-bottom: .2rem; }
.step-body p  { font-size: .92rem; color: var(--color-text-muted); margin: 0; }

/* --- Sidebar --- */
.sidebar-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 1.3rem;
  box-shadow: var(--shadow); margin-bottom: 1.4rem;
}
.sidebar-card h3 {
  font-size: .82rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--color-primary);
  margin-bottom: .9rem; padding-bottom: .45rem;
  border-bottom: 2px solid var(--color-accent-light);
}
.sidebar-nav { list-style: none; }
.sidebar-nav li + li { margin-top: .2rem; }
.sidebar-nav a {
  display: flex; align-items: center; gap: .5rem;
  padding: .5rem .6rem; border-radius: var(--radius);
  color: var(--color-text); text-decoration: none; font-size: .91rem;
  transition: background var(--transition), color var(--transition);
}
.sidebar-nav a:hover { background: var(--color-accent-light); color: var(--color-primary); }
.sidebar-nav a.current {
  background: var(--color-accent-light);
  color: var(--color-primary); font-weight: 700;
}
.sn-icon { font-size: .92rem; }

.sidebar-contact {
  background: var(--color-primary); color: #fff;
  border-radius: var(--radius-lg); padding: 1.4rem;
  text-align: center; box-shadow: var(--shadow);
}
.sidebar-contact h3 { font-size: .97rem; margin-bottom: .5rem; }
.sidebar-contact p  { font-size: .88rem; opacity: .88; margin-bottom: 1rem; line-height: 1.5; }

/* --- Back Link --- */
.back-link {
  display: inline-flex; align-items: center; gap: .5rem;
  color: var(--color-accent); text-decoration: none;
  font-size: .95rem; font-weight: 600; margin-bottom: 2rem;
  transition: gap var(--transition);
}
.back-link:hover { gap: .75rem; text-decoration: underline; }

/* --- Responsive (Detail) --- */
@media (max-width: 960px) {
  .detail-layout { grid-template-columns: 1fr; }
  .detail-sidebar { order: -1; }
  .sidebar-contact { display: none; }
}
@media (max-width: 640px) {
  .img-grid.cols-2,
  .img-grid.cols-3 { grid-template-columns: 1fr; }
  .img-featured img,
  .img-grid img { height: 220px; }
  .detail-section { padding: 2.5rem 1rem; }
}

/* ============================================================
   LIGHTBOX (Doppelklick auf Bild)
   ============================================================ */
.lightbox-overlay {
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(0,0,0,.88);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .25s ease;
}
.lightbox-overlay.open {
  opacity: 1; pointer-events: all;
}
.lightbox-img {
  max-width: 92vw; max-height: 88vh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 12px 48px rgba(0,0,0,.7);
  transform: scale(.93);
  transition: transform .25s ease;
  display: block;
}
.lightbox-overlay.open .lightbox-img {
  transform: scale(1);
}
.lightbox-close {
  position: absolute; top: 1rem; right: 1rem;
  background: rgba(255,255,255,.15);
  color: #fff; border: 2px solid rgba(255,255,255,.45);
  width: 46px; height: 46px; border-radius: 50%;
  font-size: 1.5rem; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.lightbox-close:hover,
.lightbox-close:focus { background: rgba(255,255,255,.32); }
.lightbox-hint {
  position: absolute; top: 1rem; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,.7); font-size: .82rem;
  background: rgba(0,0,0,.45); padding: .3rem .9rem;
  border-radius: 100px; white-space: nowrap; pointer-events: none;
}
.lightbox-caption {
  position: absolute; bottom: 1.5rem; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,.88); font-size: .88rem;
  background: rgba(0,0,0,.55); padding: .4rem 1.1rem;
  border-radius: 100px;
  max-width: 80vw; overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap; pointer-events: none;
}

/* Cursor-Hinweis auf klickbaren Bildern */
.service-gallery img,
.img-grid img { cursor: zoom-in; }

@media (prefers-reduced-motion: reduce) {
  .lightbox-overlay,
  .lightbox-img { transition: none !important; }
}