/* =============================================
   ETS Software Solutions & Process Consulting
   Design System – Dunkelgrün Theme
   ============================================= */

/* ----- CSS Custom Properties ----- */
:root {
  --green-900: #0d2b1a;
  --green-800: #13391f; /* Logo-Dunkelgrün */
  --green-700: #1a4d2c;
  --green-600: #216038;
  --green-500: #2a7a48;
  --green-400: #3a9e62;
  --green-100: #d4ead9;
  --green-50:  #eef6f0;

  --bg-light:  #f2f4f2;
  --bg-white:  #ffffff;
  --bg-dark:   #0f2d1c;

  --text-primary:   #1a1a1a;
  --text-secondary: #4a5568;
  --text-light:     rgba(255,255,255,0.85);
  --text-muted:     rgba(255,255,255,0.55);

  --border:    #d8e4db;

  --font: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,.10), 0 2px 8px rgba(0,0,0,.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.14);
  --transition: 0.25s ease;
  --nav-h: 70px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--bg-light);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a { text-decoration: none; color: inherit; transition: color var(--transition); }

/* ----- Container ----- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--green-700);
  color: #fff;
  border-color: var(--green-700);
}
.btn-primary:hover {
  background: var(--green-600);
  border-color: var(--green-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(26,77,44,.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
}

.btn-nav {
  background: var(--green-700);
  color: #fff;
  border-color: var(--green-700);
  padding: 10px 22px;
  font-size: 0.85rem;
}
.btn-nav:hover {
  background: var(--green-600);
  border-color: var(--green-600);
}

.btn-full { width: 100%; justify-content: center; }

/* ----- Navbar ----- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(13, 43, 26, 0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,.25);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}

.nav-logo .logo-img {
  height: 42px;
  width: auto;
  object-fit: contain;
  /* Fallback: wenn Logo dunkel ist, auf hellem Hintergrund OK; auf dark-nav brauchen wir Helligkeit */
  filter: brightness(0) invert(1);
  transition: filter var(--transition);
}

/* Logo auf hellem Hintergrund (Hero oben) – logo wird sowieso mit dem Scrollen dark */
.navbar:not(.scrolled) .nav-logo .logo-img {
  filter: brightness(0) invert(1);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  color: rgba(255,255,255,0.88);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--green-400);
  transition: width var(--transition);
}
.nav-links a:hover::after { width: 100%; }
.nav-links a:hover { color: #fff; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

/* ----- Hero ----- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, var(--green-900) 0%, var(--green-700) 55%, var(--green-600) 100%);
  z-index: 0;
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,.03) 0%, transparent 60%),
    radial-gradient(circle at 80% 80%, rgba(255,255,255,.03) 0%, transparent 60%);
}

/* Subtle grid overlay */
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: calc(var(--nav-h) + 60px);
  padding-bottom: 80px;
  max-width: 780px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50px;
  color: rgba(255,255,255,0.9);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-title .accent {
  color: var(--green-400);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255,255,255,0.78);
  max-width: 600px;
  margin-bottom: 40px;
  font-weight: 400;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.5);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  z-index: 1;
  animation: fadeInUp 1s ease 1.5s both;
}

.scroll-arrow {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.1); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(12px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ----- Sections ----- */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-600);
  margin-bottom: 12px;
}
.section-tag.light { color: var(--green-400); }

.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.dark-section .section-header h2 { color: #fff; }

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
}
.dark-section .section-header p { color: var(--text-light); }

/* ----- Cards (Leistungen) ----- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--green-700), var(--green-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--green-100);
}

.card:hover::before { transform: scaleX(1); }

.card-icon {
  width: 52px;
  height: 52px;
  background: var(--green-50);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--green-700);
}

.card-icon svg { width: 24px; height: 24px; }

.card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ----- Über uns ----- */
.dark-section {
  background: var(--bg-dark);
  color: #fff;
}

.ueber-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.ueber-text h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: #fff;
}

.ueber-text p {
  color: var(--text-light);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 16px;
}
.ueber-text p strong { color: #fff; font-weight: 700; }

.stats-row {
  display: flex;
  gap: 40px;
  margin-top: 36px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.stat { display: flex; flex-direction: column; }

.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--green-400);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.ueber-image {
  position: relative;
}

.image-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  backdrop-filter: blur(8px);
}

.image-card img {
  max-width: 240px;
  border-radius: 50%;
}

.deco-block {
  position: absolute;
  bottom: -24px;
  right: -24px;
  width: 180px;
  height: 180px;
  background: linear-gradient(135deg, var(--green-700), var(--green-500));
  border-radius: var(--radius-md);
  z-index: 0;
  opacity: 0.4;
}

/* ----- Vorteile ----- */
.vorteile-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 48px;
}

.vorteil-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.vorteil-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--green-700);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-top: 2px;
}

.vorteil-icon svg { width: 16px; height: 16px; }

.vorteil-item h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.vorteil-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ----- Kontakt ----- */
.kontakt-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: start;
}

.kontakt-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.kontakt-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.kontakt-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-400);
}

.kontakt-icon svg { width: 20px; height: 20px; }

.kontakt-item strong {
  display: block;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 2px;
  letter-spacing: 0.03em;
}

.kontakt-item span {
  color: var(--text-light);
  font-size: 0.92rem;
}

/* ----- Form ----- */
.kontakt-form {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 40px;
  backdrop-filter: blur(8px);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.03em;
}

.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: #fff;
  font-family: var(--font);
  font-size: 0.92rem;
  transition: border-color var(--transition), background var(--transition);
  outline: none;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.3);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--green-400);
  background: rgba(255,255,255,0.1);
}

.form-group textarea { resize: vertical; min-height: 120px; }

.privacy label { cursor: pointer; }

.checkbox-label {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: rgba(255,255,255,0.65);
  font-size: 0.82rem;
  line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--green-500);
  cursor: pointer;
}

.checkbox-label a {
  color: var(--green-400);
  text-decoration: underline;
}

.form-success {
  margin-top: 16px;
  padding: 14px 18px;
  background: rgba(42,122,72,0.3);
  border: 1px solid rgba(42,122,72,0.5);
  border-radius: var(--radius-sm);
  color: var(--green-100);
  font-size: 0.9rem;
  text-align: center;
}

/* ----- Footer ----- */
.footer {
  background: var(--green-900);
  padding-top: 64px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .footer-logo {
  height: 36px;
  filter: brightness(0) invert(1);
  margin-bottom: 16px;
}

.footer-brand p {
  color: rgba(255,255,255,0.5);
  font-size: 0.82rem;
  line-height: 1.65;
}

.footer-links {
  display: contents;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col h5 {
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.footer-col a {
  color: rgba(255,255,255,0.5);
  font-size: 0.88rem;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--green-400); }

.footer-bottom {
  padding: 20px 0;
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom span {
  color: rgba(255,255,255,0.35);
  font-size: 0.78rem;
}

/* ----- Animations ----- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ----- Responsive ----- */
@media (max-width: 1024px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .ueber-inner { grid-template-columns: 1fr; gap: 48px; }
  .ueber-image { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }

  .section { padding: 72px 0; }

  /* Mobile Nav */
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(13, 43, 26, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1rem; }
  .hamburger { display: flex; }

  /* Hero */
  .hero-content { padding-top: calc(var(--nav-h) + 40px); }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  /* Cards */
  .cards-grid { grid-template-columns: 1fr; }

  /* Vorteile */
  .vorteile-grid { grid-template-columns: 1fr; }

  /* Kontakt */
  .kontakt-grid { grid-template-columns: 1fr; gap: 40px; }
  .kontakt-form { padding: 28px 20px; }
  .form-row { grid-template-columns: 1fr; }

  /* Footer */
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }

  .footer-bottom .container { flex-direction: column; text-align: center; }

  /* Stats */
  .stats-row { flex-direction: column; gap: 20px; }
}

@media (max-width: 480px) {
  .section-header h2 { font-size: 1.7rem; }
  .hero-title { font-size: 2rem; }
}