/* ============================================================
   FUCO-HEG — Technische Präzision
   Industrial Blueprint Design System
   ============================================================
   THESIS: Die Seite liest sich wie ein hochwertiges technisches
   Dokument — präzise, industriell, modern. Statt generischer
   Industrie-Website (dunkel + Orange) eine dunkle, technische
   Ästhetik mit Kupfer/Messing-Akzenten und Blueprint-artigen
   Linien, Rastern und Konstruktionsdetails.
   ============================================================ */

:root {
  /* ===== Farben — Kupfer/Messing auf Anthrazit ===== */
  --bg: #0a0a0c;
  --bg-deep: #060607;
  --bg-elevated: #101013;
  --bg-card: #141418;
  --bg-card-hover: #18181d;
  --border: #232329;
  --border-light: #2e2e36;
  --border-copper: rgba(200, 121, 65, 0.35);

  --copper: #c87941;
  --copper-light: #e8a87c;
  --copper-dark: #a05a2c;
  --copper-glow: rgba(200, 121, 65, 0.25);

  --steel: #8a8a94;
  --steel-light: #b0b0ba;
  --steel-dark: #5c5c66;

  --text: #f0f0f2;
  --text-muted: #a0a0aa;
  --text-subtle: #6e6e78;

  --white: #ffffff;
  --black: #000000;

  /* ===== Verläufe ===== */
  --gradient-copper: linear-gradient(135deg, #a05a2c 0%, #c87941 50%, #e8a87c 100%);
  --gradient-copper-subtle: linear-gradient(135deg, rgba(200, 121, 65, 0.12) 0%, rgba(200, 121, 65, 0.04) 100%);
  --gradient-card: linear-gradient(145deg, #141418 0%, #101013 100%);
  --gradient-hero: linear-gradient(180deg, rgba(6, 6, 7, 0.98) 0%, rgba(6, 6, 7, 0.85) 40%, rgba(6, 6, 7, 0.6) 70%, rgba(6, 6, 7, 0.95) 100%);

  /* ===== Typografie ===== */
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* ===== Abstände ===== */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* ===== Container ===== */
  --container-max: 1280px;
  --container-padding: 1.5rem;

  /* ===== Radien ===== */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* ===== Schatten ===== */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.7);
  --shadow-copper: 0 0 24px rgba(200, 121, 65, 0.2);

  /* ===== Übergänge ===== */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ===== Z-Index ===== */
  --z-dropdown: 100;
  --z-header: 200;
  --z-modal: 300;
  --z-toast: 400;
}

/* ============================================================
   Reset & Base
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-weight: 400;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

ul, ol { list-style: none; }

/* Focus Visible */
:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 2px;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--copper);
  color: var(--white);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  z-index: var(--z-toast);
  font-weight: 600;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: var(--space-md); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Selection */
::selection {
  background: rgba(200, 121, 65, 0.3);
  color: var(--white);
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--copper-dark); }

/* ============================================================
   Container
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ============================================================
   Typografie
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.75rem, 6vw, 5rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); letter-spacing: -0.02em; }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.3rem); }

p { color: var(--text-muted); font-size: 1rem; line-height: 1.7; }

.lead {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text);
  font-weight: 400;
  max-width: 60ch;
  line-height: 1.6;
}

.text-copper { color: var(--copper-light); }

.section-subtitle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--copper-light);
  margin-bottom: var(--space-md);
}
.section-subtitle::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--copper);
  display: inline-block;
}

.title-bar {
  text-align: center;
  margin-bottom: var(--space-3xl);
}
.title-bar .section-subtitle { justify-content: center; }
.title-bar .section-subtitle::before { display: none; }
.title-bar h2 { max-width: 700px; margin: var(--space-md) auto 0; }
.title-bar .section-desc {
  max-width: 600px;
  margin: var(--space-md) auto 0;
  color: var(--text-muted);
}

/* ============================================================
   Technische Raster / Blueprint Hintergründe
   ============================================================ */

.tech-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(200, 121, 65, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 121, 65, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.tech-grid-fine {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(200, 121, 65, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 121, 65, 0.02) 1px, transparent 1px);
  background-size: 20px 20px;
}

/* Eck-Markierungen für technische Module */
.corner-markers {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.corner-markers::before,
.corner-markers::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid var(--copper);
  opacity: 0.6;
}
.corner-markers::before {
  top: -1px;
  left: -1px;
  border-right: none;
  border-bottom: none;
}
.corner-markers::after {
  bottom: -1px;
  right: -1px;
  border-left: none;
  border-top: none;
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-gold {
  background: var(--gradient-copper);
  color: var(--white);
  border: none;
  box-shadow: var(--shadow-md);
}
.btn-gold::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-copper), var(--shadow-lg);
}
.btn-gold:hover::before { opacity: 1; }
.btn-gold:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-light);
}
.btn-outline:hover {
  border-color: var(--copper);
  background: rgba(200, 121, 65, 0.08);
  color: var(--copper-light);
}

.btn-lg { padding: 1rem 2.25rem; font-size: 1rem; }
.btn-sm { padding: 0.625rem 1.25rem; font-size: 0.85rem; }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ============================================================
   Badge
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.375rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  border-radius: var(--radius-full);
  background: rgba(200, 121, 65, 0.1);
  color: var(--copper-light);
  border: 1px solid var(--border-copper);
}

/* ============================================================
   Header & Navigation
   ============================================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background: rgba(10, 10, 12, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-base);
}
.header.scrolled {
  background: rgba(10, 10, 12, 0.97);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo img { filter: brightness(1.1); }
.logo-text { display: none; }
.logo-text .highlight { color: var(--copper-light); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.nav-menu a {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}
.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--copper);
  border-radius: 2px;
}

.nav-cta {
  margin-left: var(--space-md);
  padding: 0.625rem 1.25rem;
  background: var(--gradient-copper);
  color: var(--white);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-copper);
}

.nav-dropdown { position: relative; }
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  margin-top: var(--space-xs);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-dropdown);
}
.nav-dropdown:hover .dropdown-menu,
.dropdown-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-menu a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.dropdown-menu a:hover,
.dropdown-menu a.active {
  color: var(--text);
  background: rgba(200, 121, 65, 0.08);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  padding: 0;
}
.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition-base);
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ============================================================
   Hero Section — Blueprint Animation
   ============================================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg-deep);
}
.hero > * { position: relative; }

/* Hero Background Image */
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
  transform: scale(1.1);
  animation: heroZoom 20s ease-in-out infinite alternate;
  filter: sepia(0.3) hue-rotate(-15deg) saturate(0.8) brightness(0.7);
}
@keyframes heroZoom {
  0% { transform: scale(1.1) translateY(0); }
  100% { transform: scale(1.15) translateY(-10px); }
}

/* Hero Background Overlay — Kupfer-Farbton */
.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(6, 6, 7, 0.9) 0%,
    rgba(6, 6, 7, 0.7) 30%,
    rgba(6, 6, 7, 0.5) 60%,
    rgba(6, 6, 7, 0.9) 100%
  );
  z-index: 1;
}
.hero-bg-overlay::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(200, 121, 65, 0.08);
  mix-blend-mode: overlay;
  pointer-events: none;
}

/* Z-Index für Hero-Ebenen */
.hero .tech-grid { z-index: 2; }
.hero .hero-blueprint { z-index: 2; }
.hero .hero-particles { z-index: 2; }
.hero .hero-overlay-text { z-index: 2; }
.hero .container { z-index: 3; }
.hero .scroll-down { z-index: 3; }

/* Blueprint-Linien Animation */
.hero-blueprint {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  opacity: 0.5;
}
.hero-blueprint .line-h {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(200, 121, 65, 0.15), transparent);
  animation: lineScan 8s linear infinite;
}
.hero-blueprint .line-h:nth-child(1) { top: 20%; animation-delay: 0s; }
.hero-blueprint .line-h:nth-child(2) { top: 50%; animation-delay: 2.5s; }
.hero-blueprint .line-h:nth-child(3) { top: 80%; animation-delay: 5s; }

.hero-blueprint .line-v {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(200, 121, 65, 0.12), transparent);
  animation: lineScanV 10s linear infinite;
}
.hero-blueprint .line-v:nth-child(4) { left: 25%; animation-delay: 1s; }
.hero-blueprint .line-v:nth-child(5) { left: 60%; animation-delay: 4s; }
.hero-blueprint .line-v:nth-child(6) { left: 85%; animation-delay: 7s; }

@keyframes lineScan {
  0% { transform: translateX(-100%); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateX(100%); opacity: 0; }
}
@keyframes lineScanV {
  0% { transform: translateY(-100%); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(100%); opacity: 0; }
}

/* Partikel */
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}
.hero-particles .particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--copper);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 12s linear infinite;
}
.hero-particles .particle:nth-child(1) { left: 10%; top: 30%; animation-delay: 0s; }
.hero-particles .particle:nth-child(2) { left: 25%; top: 70%; animation-delay: 2s; }
.hero-particles .particle:nth-child(3) { left: 40%; top: 20%; animation-delay: 4s; }
.hero-particles .particle:nth-child(4) { left: 55%; top: 80%; animation-delay: 1s; }
.hero-particles .particle:nth-child(5) { left: 70%; top: 40%; animation-delay: 3s; }
.hero-particles .particle:nth-child(6) { left: 85%; top: 60%; animation-delay: 5s; }
.hero-particles .particle:nth-child(7) { left: 15%; top: 50%; animation-delay: 6s; }
.hero-particles .particle:nth-child(8) { left: 90%; top: 25%; animation-delay: 7s; }
.hero-particles .particle:nth-child(9) { left: 50%; top: 10%; animation-delay: 8s; }
.hero-particles .particle:nth-child(10) { left: 35%; top: 90%; animation-delay: 9s; }

@keyframes particleFloat {
  0% { transform: translateY(0) scale(1); opacity: 0; }
  10% { opacity: 0.8; }
  50% { transform: translateY(-40px) scale(1.5); opacity: 0.4; }
  90% { opacity: 0.8; }
  100% { transform: translateY(-80px) scale(0.5); opacity: 0; }
}

/* Hero Overlay Text */
.hero-overlay-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: clamp(6rem, 16vw, 20rem);
  font-weight: 800;
  color: rgba(200, 121, 65, 0.04);
  letter-spacing: -0.05em;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  z-index: 2;
}

/* Hero Content */
.hero-content {
  text-align: center;
  max-width: 900px;
  padding: var(--space-4xl) 0;
}
.hero-content .badge {
  margin-bottom: var(--space-lg);
  animation: fadeSlideUp 0.8s ease forwards;
}
.hero-content h1 {
  margin-bottom: var(--space-lg);
  animation: fadeSlideUp 0.8s ease 0.1s forwards;
  opacity: 0;
}
.hero-content .lead {
  margin-bottom: var(--space-xl);
  margin-left: auto;
  margin-right: auto;
  animation: fadeSlideUp 0.8s ease 0.2s forwards;
  opacity: 0;
}
.hero-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
  animation: fadeSlideUp 0.8s ease 0.3s forwards;
  opacity: 0;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  max-width: 500px;
  margin: 0 auto;
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--border);
  animation: fadeSlideUp 0.8s ease 0.4s forwards;
  opacity: 0;
}
.hero-stat {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.hero-stat .stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.02em;
}
.hero-stat .stat-number::after {
  content: '+';
  color: var(--copper);
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll Down Indicator */
.scroll-down {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: var(--text-subtle);
  animation: bounceDown 2s ease-in-out infinite;
}
.scroll-down svg { width: 24px; height: 24px; fill: currentColor; }

@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* Service Hero (Subpages) */
.service-hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg-deep);
}
.service-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 1;
}
.service-hero > * { position: relative; z-index: 2; }
.service-hero .hero-overlay-text { opacity: 0.03; }
.service-hero .hero-content { padding: var(--space-3xl) 0; }
.service-hero .hero-stats { display: none; }

/* Alt Hero */
.hero-alt {
  min-height: 50vh;
}
.hero-alt .hero-content { padding: var(--space-2xl) 0; }

/* ============================================================
   Sections
   ============================================================ */

.section {
  padding: var(--space-4xl) 0;
}
.section-sm { padding: var(--space-2xl) 0; }

/* ============================================================
   Services Grid — Technische Module
   ============================================================ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-lg);
}

.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-xl);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-slow);
  overflow: hidden;
  text-decoration: none;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}
.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-copper-subtle);
  opacity: 0;
  transition: opacity var(--transition-slow);
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-copper);
  box-shadow: var(--shadow-xl);
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover::after { opacity: 1; }

.service-card > * { position: relative; z-index: 1; }

.svc-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  transition: all var(--transition-base);
}
.svc-icon svg {
  width: 28px;
  height: 28px;
  fill: var(--copper);
  transition: transform var(--transition-base);
}
.service-card:hover .svc-icon {
  border-color: var(--border-copper);
  background: rgba(200, 121, 65, 0.08);
}
.service-card:hover .svc-icon svg { transform: scale(1.1); }

.service-card h3 {
  margin-bottom: var(--space-sm);
  transition: color var(--transition-base);
}
.service-card:hover h3 { color: var(--copper-light); }
.service-card p {
  flex: 1;
  margin-bottom: var(--space-lg);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.card-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--copper);
  opacity: 0;
  transform: translateX(-10px);
  transition: all var(--transition-base);
}
.service-card:hover .card-arrow { opacity: 1; transform: translateX(0); }
.card-arrow svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  transition: transform var(--transition-fast);
}
.service-card:hover .card-arrow svg { transform: translateX(4px); }

/* ============================================================
   Content Block (Two-column)
   ============================================================ */

.content-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  margin-bottom: var(--space-3xl);
}
.content-block.reverse { direction: rtl; }
.content-block.reverse > * { direction: ltr; }

.content-text h2 { margin-bottom: var(--space-lg); }
.content-text p { margin-bottom: var(--space-md); }
.content-text p:last-of-type { margin-bottom: 0; }

.content-list {
  margin: var(--space-lg) 0;
  padding-left: var(--space-lg);
}
.content-list li {
  position: relative;
  padding-left: var(--space-md);
  margin-bottom: var(--space-sm);
  color: var(--text-muted);
}
.content-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--copper);
  transform: translateX(-50%);
}

.content-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  position: relative;
}
.content-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid var(--border-copper);
  border-radius: var(--radius-lg);
  pointer-events: none;
  opacity: 0.4;
}
.content-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}
.content-image:hover img { transform: scale(1.02); }

.quote-block {
  text-align: center;
  padding: var(--space-2xl);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.quote-block::before {
  content: '"';
  position: absolute;
  top: var(--space-md);
  left: var(--space-lg);
  font-family: var(--font-display);
  font-size: 6rem;
  font-weight: 800;
  color: rgba(200, 121, 65, 0.1);
  line-height: 1;
}
.quote-block p {
  position: relative;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-style: italic;
  color: var(--text);
  margin-bottom: var(--space-md);
  line-height: 1.5;
}
.quote-author {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--copper);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================================
   Features Grid
   ============================================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  padding: var(--space-xl);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-slow);
  position: relative;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--gradient-copper);
  transition: height var(--transition-slow);
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-copper);
  box-shadow: var(--shadow-lg);
}
.feature-card:hover::before { height: 100%; }

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}
.feature-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--copper);
}

.feature-card h4 { margin-bottom: var(--space-sm); }
.feature-card p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

/* Animation delays */
.animate-delay-1 { animation-delay: 100ms; }
.animate-delay-2 { animation-delay: 200ms; }
.animate-delay-3 { animation-delay: 300ms; }
.animate-delay-4 { animation-delay: 400ms; }
.animate-delay-5 { animation-delay: 500ms; }

/* ============================================================
   Stats Section
   ============================================================ */

.stats-section {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-2xl);
}

.stat-item {
  text-align: center;
  position: relative;
  padding: var(--space-lg);
}
.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: var(--gradient-copper);
}
.stat-item .stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}
.stat-item .stat-number::after {
  content: '+';
  color: var(--copper);
}
.stat-item .stat-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================================
   References / Projekte
   ============================================================ */

.references-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.ref-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-slow);
  position: relative;
}
.ref-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
  z-index: 2;
}
.ref-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-copper);
  box-shadow: var(--shadow-lg);
}
.ref-card:hover::before { transform: scaleX(1); }

.ref-image {
  aspect-ratio: 16/10;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition-slow);
}
.ref-card:hover .ref-image { transform: scale(1.05); }

.ref-content { padding: var(--space-lg); }
.ref-category {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--copper);
  background: rgba(200, 121, 65, 0.08);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
  border: 1px solid var(--border-copper);
}
.ref-content h4 { margin-bottom: var(--space-xs); font-size: 1.1rem; }
.ref-content p { font-size: 0.85rem; color: var(--text-subtle); margin: 0; line-height: 1.6; }

/* ============================================================
   CTA Section
   ============================================================ */

.cta-section {
  text-align: center;
  padding: var(--space-3xl);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-copper-subtle);
  opacity: 0.5;
}
.cta-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200, 121, 65, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 121, 65, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.cta-section > * { position: relative; z-index: 1; }
.cta-section h3 { margin-bottom: var(--space-sm); }
.cta-section p {
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   About Page
   ============================================================ */

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.value-card {
  padding: var(--space-xl);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-slow);
  position: relative;
}
.value-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}
.value-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-copper);
}
.value-card:hover::before { transform: scaleX(1); }

.value-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(200, 121, 65, 0.08);
  border: 1px solid var(--border-copper);
}
.value-icon svg {
  width: 32px;
  height: 32px;
  fill: var(--copper);
}
.value-card h3 { margin-bottom: var(--space-sm); }
.value-card p { color: var(--text-muted); margin: 0; font-size: 0.95rem; }

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: var(--space-3xl) auto 0;
  padding-left: var(--space-xl);
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--copper) 0%, rgba(200, 121, 65, 0.1) 100%);
}
.timeline-item {
  position: relative;
  padding-bottom: var(--space-2xl);
  padding-left: var(--space-xl);
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-marker {
  position: absolute;
  left: -6px;
  top: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--copper);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px var(--copper);
}
.timeline-content {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}
.timeline-content:hover {
  border-color: var(--border-copper);
  transform: translateX(4px);
}
.timeline-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--copper);
  background: rgba(200, 121, 65, 0.08);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
  border: 1px solid var(--border-copper);
}
.timeline-content h3 { margin-bottom: var(--space-xs); font-size: 1.1rem; }
.timeline-content p { color: var(--text-muted); font-size: 0.9rem; margin: 0; }

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.team-card {
  text-align: center;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-slow);
}
.team-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-copper);
}
.team-image {
  aspect-ratio: 1/1;
  background: linear-gradient(135deg, var(--border) 0%, var(--bg-deep) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-subtle);
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
}
.team-content { padding: var(--space-lg); }
.team-content h4 { margin-bottom: var(--space-xs); }
.team-role {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--copper);
  font-weight: 500;
  margin-bottom: var(--space-sm);
  display: block;
}
.team-content p { font-size: 0.85rem; color: var(--text-subtle); margin: 0; }

/* Certifications */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.cert-card {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}
.cert-card:hover {
  border-color: var(--border-copper);
  transform: translateX(4px);
}
.cert-icon {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(200, 121, 65, 0.08);
  border: 1px solid var(--border-copper);
  border-radius: var(--radius-md);
}
.cert-icon svg {
  width: 32px;
  height: 32px;
  fill: var(--copper);
}
.cert-content h4 { margin-bottom: var(--space-xs); }
.cert-content p { font-size: 0.85rem; color: var(--text-subtle); margin: 0; }

/* ============================================================
   Services Overview Page
   ============================================================ */

.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
  padding: var(--space-3xl) 0;
  border-bottom: 1px solid var(--border);
}
.service-detail:last-child { border-bottom: none; }
.service-detail.reverse { direction: rtl; }
.service-detail.reverse > * { direction: ltr; }

.service-detail-content .badge { margin-bottom: var(--space-md); }
.service-detail-content h2 { margin-bottom: var(--space-lg); }
.service-detail-content p { margin-bottom: var(--space-md); }
.service-detail-content ul { margin: var(--space-lg) 0; padding-left: var(--space-lg); }
.service-detail-content li {
  margin-bottom: var(--space-sm);
  color: var(--text-muted);
  position: relative;
  padding-left: var(--space-md);
}
.service-detail-content li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--copper);
  transform: translateX(-50%);
}

.service-detail-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  position: sticky;
  top: 100px;
}
.service-detail-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}
.service-detail:hover .service-detail-image img { transform: scale(1.02); }

/* ============================================================
   Contact Page
   ============================================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-3xl);
  margin-top: var(--space-2xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}
.contact-card:hover {
  border-color: var(--border-copper);
  transform: translateX(4px);
}
.contact-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(200, 121, 65, 0.08);
  border: 1px solid var(--border-copper);
  border-radius: var(--radius-md);
}
.contact-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--copper);
}
.contact-content h4 { margin-bottom: var(--space-xs); }
.contact-content p { color: var(--text-muted); margin: 0; font-size: 0.95rem; }
.contact-content a { color: var(--text); transition: color var(--transition-fast); }
.contact-content a:hover { color: var(--copper-light); }

.contact-form-wrapper {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
}

.form-group { margin-bottom: var(--space-lg); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); }

.form-group label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: var(--space-xs);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  transition: all var(--transition-fast);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-subtle); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--copper);
  box-shadow: 0 0 0 3px rgba(200, 121, 65, 0.12);
}
.form-group textarea { min-height: 140px; resize: vertical; }

.form-group .error {
  display: block;
  color: #ef4444;
  font-size: 0.8rem;
  margin-top: var(--space-xs);
  min-height: 1.2em;
}

.form-submit { margin-top: var(--space-xl); width: 100%; }

.form-status {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  display: none;
}
.form-status.success {
  display: block;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #4ade80;
}
.form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
}

/* Map Placeholder */
.map-placeholder {
  aspect-ratio: 16/9;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  color: var(--text-subtle);
  margin-top: var(--space-xl);
  position: relative;
  overflow: hidden;
}
.map-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200, 121, 65, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 121, 65, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}
.map-placeholder svg {
  width: 48px;
  height: 48px;
  fill: var(--copper);
  opacity: 0.5;
  position: relative;
  z-index: 1;
}
.map-placeholder p { position: relative; z-index: 1; }

/* ============================================================
   FAQ Page
   ============================================================ */

.faq-container { max-width: 900px; margin: 0 auto; }

.faq-category { margin-bottom: var(--space-2xl); }
.faq-category h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--copper-light);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--gradient-card);
  margin-bottom: var(--space-md);
}
.faq-item:last-child { margin-bottom: 0; }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-lg);
  text-align: left;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.faq-question:hover { background: rgba(255, 255, 255, 0.02); }
.faq-question:focus-visible { outline: none; background: rgba(200, 121, 65, 0.08); }

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  margin-left: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--copper);
  transition: transform var(--transition-base);
  font-size: 1.5rem;
  font-weight: 300;
}
.faq-item.active .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-base);
}
.faq-answer.open { max-height: 500px; }
.answer-content {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--text-muted);
  line-height: 1.7;
}
.answer-content p { margin-bottom: var(--space-md); }
.answer-content p:last-child { margin-bottom: 0; }
.answer-content ul { margin: var(--space-md) 0; padding-left: var(--space-lg); }
.answer-content li { margin-bottom: var(--space-xs); }

/* ============================================================
   Footer
   ============================================================ */

.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-4xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin-bottom: var(--space-lg);
  color: var(--text);
}

.footer-col p {
  color: var(--text-subtle);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.footer-cert { display: flex; gap: var(--space-md); align-items: center; opacity: 0.6; }

.footer-links { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}
.footer-links a:hover { color: var(--copper-light); }

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-bottom p {
  color: var(--text-subtle);
  font-size: 0.85rem;
  margin: 0;
}

/* ============================================================
   Back to Top
   ============================================================ */

.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-copper);
  border-radius: var(--radius-full);
  color: var(--white);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-copper), var(--shadow-xl);
}
.back-to-top svg { width: 20px; height: 20px; fill: currentColor; }

/* ============================================================
   Scroll Animations
   ============================================================ */

.animate-fade-up,
.animate-fade-left,
.animate-fade-right {
  opacity: 0;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.animate-fade-up { transform: translateY(30px); }
.animate-fade-left { transform: translateX(-30px); }
.animate-fade-right { transform: translateX(30px); }

.animate-fade-up.visible,
.animate-fade-left.visible,
.animate-fade-right.visible {
  opacity: 1;
  transform: translate(0);
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1024px) {
  .content-block,
  .service-detail {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  .content-block.reverse { direction: ltr; }
  .service-detail-image { position: static; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-xs);
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-menu a { width: 100%; padding: var(--space-md); }
  .nav-cta { width: 100%; margin-left: 0; text-align: center; }
  .nav-dropdown .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    margin: 0;
    display: none;
  }
  .nav-dropdown .dropdown-menu.active { display: block; }
  .dropdown-menu a { padding-left: var(--space-xl); font-size: 0.85rem; }

  .hero-stats { grid-template-columns: 1fr; gap: var(--space-lg); }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-cert { justify-content: center; }
  .footer-links { align-items: center; }
  .contact-form-wrapper { padding: var(--space-lg); }
  .cert-card { flex-direction: column; text-align: center; }
  .cert-card:hover { transform: translateY(-4px); }
}

@media (max-width: 480px) {
  .hero-stats { grid-template-columns: 1fr; }
  .stat-number { font-size: 2.5rem; }
  .btn { width: 100%; }
  .hero-buttons { flex-direction: column; }
  .back-to-top { bottom: var(--space-md); right: var(--space-md); width: 44px; height: 44px; }
}

/* ============================================================
   Print Styles
   ============================================================ */

@media print {
  .header, .hero, .footer, .back-to-top, .btn { display: none !important; }
  .section { padding: var(--space-lg) 0; }
  body { background: var(--white); color: var(--black); }
  a { text-decoration: underline; }
}