/* =============================================
   KIRCHHOFF & KIRCHHOFF – STYLESHEET v2
   ============================================= */

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

:root {
  --bg-main:       #0A0C0F;
  --bg-section:    #0F1215;
  --bg-card:       #13171C;
  --bg-card-hover: #181D23;
  --accent:        #3B82F6;
  --accent-dim:    rgba(59,130,246,0.15);
  --accent-glow:   rgba(59,130,246,0.35);
  --border:        rgba(255,255,255,0.07);
  --border-accent: rgba(59,130,246,0.3);
  --text-primary:  #F0F2F5;
  --text-secondary:#8A95A3;
  --text-muted:    #808B99;
  --font-serif:    'DM Serif Display', Georgia, serif;
  --font-body:     'Outfit', sans-serif;
  --font-mono:     'DM Mono', 'Courier New', monospace;
  --radius:        12px;
  --radius-lg:     20px;
  --transition:    0.25s ease;
  --shadow:        0 8px 32px rgba(0,0,0,0.4);
  --header-h:      72px;
}

/* Logo image */
.logo-img {
  height: 44px;
  max-height: calc(var(--header-h) - 24px);
  width: auto;
  display: block;
  object-fit: contain;
  transition: opacity 0.2s ease;
}
.logo-img:hover { opacity: 0.85; }

.footer-logo-img {
  height: 28px;
  width: auto;
  display: block;
  object-fit: contain;
  margin-bottom: 4px;
  opacity: 0.85;
}

/* Maps embed */
.maps-embed {
  margin-top: 8px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.maps-embed iframe {
  display: block;
  border-radius: var(--radius);
  filter: grayscale(40%) contrast(0.9);
  transition: filter var(--transition);
}
.maps-embed iframe:hover { filter: grayscale(0%) contrast(1); }

/* Light mode */
body.light {
  --bg-main:       #F4F6F9;
  --bg-section:    #ECEEF2;
  --bg-card:       #FFFFFF;
  --bg-card-hover: #F8F9FB;
  --border:        rgba(0,0,0,0.08);
  --border-accent: rgba(59,130,246,0.4);
  --text-primary:  #0D1117;
  --text-secondary:#4A5568;
  --text-muted:    #646E7B;
  --shadow:        0 4px 20px rgba(0,0,0,0.1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  background: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* --- TYPOGRAPHY --- */
.mono { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; }
h1, h2, h3 { font-family: var(--font-serif); font-weight: 400; line-height: 1.2; }
h2 { font-size: clamp(2rem, 4vw, 2.8rem); color: var(--text-primary); }
h3 { font-size: 1.3rem; }
p { color: var(--text-secondary); }

/* --- CONTAINER --- */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #2563EB; transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow); }
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-full { width: 100%; justify-content: center; }
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  transition: color var(--transition);
}
.btn-back:hover { color: var(--accent); }

/* =============================================
   HEADER
   ============================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: rgba(10,12,15,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

body.light .site-header {
  background: rgba(244,246,249,0.9);
}

.header-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-mark {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  background: var(--accent);
  padding: 5px 9px;
  border-radius: 6px;
  letter-spacing: 0.05em;
}
body.light .logo-mark { color: #fff; }
.logo-text {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--text-primary);
}
.logo-amp { color: var(--accent); }

/* Nav */
.main-nav {
  display: flex;
  gap: 36px;
}
.main-nav a {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.main-nav a:hover { color: var(--text-primary); }
.main-nav a:hover::after { width: 100%; }

/* Header actions */
.header-actions { display: flex; align-items: center; gap: 12px; }

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: all var(--transition);
  position: relative;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.toggle-icon { position: absolute; transition: all 0.3s ease; }
.toggle-icon.sun { opacity: 0; transform: translateY(-8px); }
.toggle-icon.moon { opacity: 1; transform: translateY(0); }
body.light .toggle-icon.sun { opacity: 1; transform: translateY(0); }
body.light .toggle-icon.moon { opacity: 0; transform: translateY(8px); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  padding: 10px;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.nav-hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text-secondary);
  transition: all var(--transition);
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* =============================================
   HERO
   ============================================= */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 60px) 24px 80px;
  position: relative;
  overflow: hidden;
  background: var(--bg-main);
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  opacity: 0.5;
}

.hero-content {
  max-width: 1160px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.hero-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 7vw, 5rem);
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 24px;
}
.hero-title em {
  font-style: italic;
  color: var(--accent);
}
.hero-sub {
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.7;
}
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero visual */
.hero-visual {
  position: absolute;
  right: -100px;
  top: 50%;
  transform: translateY(-50%);
  width: 600px;
  height: 600px;
  pointer-events: none;
}
.hero-orb {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,0.4) 0%, transparent 70%);
  filter: blur(40px);
}
.hero-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  border-radius: 50%;
  border: 1px solid var(--border-accent);
  animation: spin linear infinite;
}
.ring-1 { width: 280px; height: 280px; animation-duration: 20s; opacity: 0.6; }
.ring-2 { width: 420px; height: 420px; animation-duration: 30s; opacity: 0.3; animation-direction: reverse; }
.ring-3 { width: 560px; height: 560px; animation-duration: 45s; opacity: 0.15; }

@keyframes spin {
  from { transform: translate(-50%,-50%) rotate(0deg); }
  to   { transform: translate(-50%,-50%) rotate(360deg); }
}

/* =============================================
   SECTION HEADER
   ============================================= */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-label {
  color: var(--accent);
  display: block;
  margin-bottom: 16px;
}
.section-header h2 { margin-bottom: 16px; }
.section-header p { color: var(--text-secondary); max-width: 520px; margin: 0 auto; }

/* =============================================
   SERVICES
   ============================================= */
.services {
  padding: 120px 0;
  background: var(--bg-section);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.service-card:hover::before { opacity: 1; }
.service-card:hover .service-link { color: var(--accent); }

.service-icon {
  width: 52px;
  height: 52px;
  background: var(--accent-dim);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.service-icon svg { width: 28px; height: 28px; }
.service-num {
  color: var(--text-muted);
  font-size: 0.7rem;
}
.service-card h3 { color: var(--text-primary); margin: 0; }
.service-card p { flex: 1; font-size: 0.95rem; }
.service-link {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  transition: color var(--transition);
}

/* =============================================
   USP BANNER
   ============================================= */
.usp-banner {
  padding: 48px 0;
  background: var(--bg-main);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.usp-grid {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.usp-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.usp-icon { color: var(--accent); font-size: 1.1rem; }

/* =============================================
   REFERENCES
   ============================================= */
.references {
  padding: 120px 0;
  background: var(--bg-section);
}
.references-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.ref-text { display: flex; flex-direction: column; gap: 20px; }
.ref-text p { font-size: 1rem; line-height: 1.8; }

.ref-stats {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* =============================================
   CONTACT
   ============================================= */
.contact {
  padding: 120px 0;
  background: var(--bg-main);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 32px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.contact-icon {
  font-size: 1.3rem;
  color: var(--accent);
  margin-top: 2px;
  flex-shrink: 0;
  width: 32px;
}
.contact-item > div { display: flex; flex-direction: column; gap: 4px; }
.contact-label { color: var(--text-muted); font-size: 0.7rem; letter-spacing: 0.08em; }
.contact-item a { color: var(--text-primary); font-size: 1rem; transition: color var(--transition); }
.contact-item a:hover { color: var(--accent); }
.contact-item span:last-child { color: var(--text-secondary); font-size: 1rem; }

/* Form */
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  font-family: var(--font-body);
  font-size: 1rem; /* min. 16px – verhindert Auto-Zoom auf iOS */
  font-weight: 300;
  color: var(--text-primary);
  transition: border-color var(--transition);
  outline: none;
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group input.error,
.form-group textarea.error { border-color: #EF4444; }
.form-error {
  font-size: 0.78rem;
  color: #EF4444;
  font-family: var(--font-mono);
  min-height: 16px;
}
.form-success {
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.3);
  border-radius: 8px;
  padding: 16px;
  color: #4ADE80;
  font-size: 0.9rem;
  text-align: center;
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.footer-brand { display: flex; flex-direction: column; gap: 8px; }
.footer-brand .logo-mark {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  background: var(--accent);
  padding: 5px 9px;
  border-radius: 6px;
  letter-spacing: 0.05em;
  display: inline-block;
  width: fit-content;
}
.footer-brand p { font-size: 0.9rem; color: var(--text-secondary); }
.footer-address { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); }
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-end;
}
.footer-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  padding-top: 24px;
  text-align: center;
}
.footer-bottom span { color: var(--text-muted); font-size: 0.75rem; }

/* =============================================
   SUBPAGE STYLES
   ============================================= */
.subpage-hero {
  padding: calc(var(--header-h) + 80px) 0 80px;
  background: var(--bg-section);
  border-bottom: 1px solid var(--border);
}
.subpage-breadcrumb { margin-bottom: 24px; }
.subpage-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  margin-bottom: 20px;
}
.subpage-hero .lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.8;
}

.subpage-content { padding: 80px 0; background: var(--bg-main); }

.content-block { margin-bottom: 64px; }
.content-block h2 {
  font-size: 1.6rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.content-block p { margin-bottom: 16px; font-size: 1rem; line-height: 1.8; }

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}
.feature-list li::before {
  content: '→';
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-top: 3px;
  flex-shrink: 0;
}

.content-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 28px;
}
.gallery-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}
.gallery-item:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.gallery-item img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.gallery-caption {
  padding: 14px 18px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.subpage-cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}
.subpage-cta-box h3 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  margin-bottom: 12px;
}
.subpage-cta-box p { margin-bottom: 28px; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .services-grid { grid-template-columns: 1fr; }
  .references-content { grid-template-columns: 1fr; gap: 48px; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { display: none; }
  .usp-grid { gap: 24px; }
  .footer-links { align-items: flex-start; }
  .content-gallery { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-section);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    z-index: 1001;
  }
  .main-nav.open { display: flex; }
  .main-nav a { font-size: 1rem; color: var(--text-primary); padding: 10px 0; }
  .nav-hamburger { display: flex; }
  .footer-inner { flex-direction: column; }
  .footer-links { align-items: flex-start; flex-direction: row; flex-wrap: wrap; gap: 8px 20px; }
  .footer-links a { padding: 6px 0; }
  .subpage-cta-box { padding: 28px 20px; }
  .content-gallery { grid-template-columns: 1fr; }
  .gallery-item img { height: 200px; }
}

/* =============================================
   REDUCED MOTION
   ============================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-ring { animation: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

/* =============================================
   GOOGLE MAPS FACADE (DSGVO – Klick zum Laden)
   ============================================= */
.maps-facade {
  width: 100%;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 28px 20px;
  background:
    radial-gradient(circle at 50% 40%, var(--accent-dim), transparent 70%),
    var(--bg-card);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-secondary);
  font-family: var(--font-body);
  text-align: center;
  transition: background var(--transition);
}
.maps-facade:hover { background: var(--bg-card-hover); }
.maps-facade-pin { font-size: 1.8rem; color: var(--accent); }
.maps-facade-title { font-size: 0.95rem; color: var(--text-primary); font-weight: 500; }
.maps-facade-hint { font-size: 0.75rem; font-family: var(--font-mono); color: var(--text-muted); }
.maps-embed iframe { width: 100%; height: 220px; }