/* ===== Rühlig Brand Colors ===== */
:root {
  --primary: #E8522E;
  --primary-dark: #c93d1c;
  --primary-light: #f0785a;
  --secondary: #2D3748;
  --accent-org: #4A90D9;
  --accent-recht: #48BB78;
  --accent-tech: #ED8936;
  --bg-light: #F7F8FA;
  --bg-white: #FFFFFF;
  --text-dark: #1A202C;
  --text-mid: #4A5568;
  --text-light: #A0AEC0;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif; color: var(--text-dark); line-height: 1.6; overflow-x: hidden; }

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  z-index: 1000;
  height: 72px;
  display: flex;
  align-items: center;
}
.nav-inner {
  max-width: 1200px; width: 100%; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
}
.nav-logo { height: 36px; width: auto; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
  text-decoration: none; color: var(--text-mid); font-size: 14px; font-weight: 500;
  transition: color var(--transition); position: relative;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: var(--primary); transform: scaleX(0);
  transition: transform var(--transition);
}
.nav-links a:hover::after { transform: scaleX(1); }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-dark); }

/* ===== Hero ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1A202C 0%, #2D3748 50%, #1A202C 100%);
  position: relative; overflow: hidden; padding: 120px 24px 80px;
}
.hero-overlay {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(232,82,46,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(74,144,217,0.1) 0%, transparent 60%);
}
.hero-content { position: relative; text-align: center; max-width: 800px; }
.hero-badge {
  display: inline-block; padding: 8px 20px; border-radius: 50px;
  background: rgba(232,82,46,0.2); color: var(--primary-light);
  font-size: 13px; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 24px;
  border: 1px solid rgba(232,82,46,0.3);
}
.hero h1 { font-size: clamp(40px, 8vw, 80px); font-weight: 800; color: #fff; line-height: 1.1; margin-bottom: 20px; }
.hero-sub { font-size: clamp(16px, 2.5vw, 20px); color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 40px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-block; padding: 14px 32px; border-radius: 50px;
  font-size: 15px; font-weight: 600; text-decoration: none;
  transition: all var(--transition); cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,82,46,0.3); }
.btn-secondary { background: rgba(255,255,255,0.1); color: #fff; border: 1px solid rgba(255,255,255,0.2); }
.btn-secondary:hover { background: rgba(255,255,255,0.2); transform: translateY(-2px); }

/* ===== Sections ===== */
.section { padding: 100px 24px; }
.section-alt { background: var(--bg-light); }
.container { max-width: 1100px; margin: 0 auto; }
.section-header { text-align: center; max-width: 700px; margin: 0 auto 60px; }
.section-tag {
  display: inline-block; padding: 6px 16px; border-radius: 50px;
  background: rgba(232,82,46,0.1); color: var(--primary);
  font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  margin-bottom: 16px;
}
.section-header h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; color: var(--text-dark); margin-bottom: 16px; }
.section-desc { font-size: 17px; color: var(--text-mid); line-height: 1.7; }

/* ===== Concept Grid ===== */
.concept-grid {
  display: flex; align-items: center; gap: 20px; justify-content: center;
  flex-wrap: wrap;
}
.concept-card {
  background: var(--bg-white); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow);
  flex: 1; min-width: 240px; max-width: 320px;
  text-align: center; transition: all var(--transition);
  position: relative; overflow: hidden;
}
.concept-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px;
}
.concept-card-01::before { background: var(--accent-org); }
.concept-card-02::before { background: var(--accent-recht); }
.concept-card-03::before { background: var(--accent-tech); }
.concept-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.concept-number { font-size: 32px; font-weight: 800; color: var(--primary); margin-bottom: 12px; }
.concept-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.concept-card p { font-size: 14px; color: var(--text-mid); line-height: 1.6; }
.concept-arrow { font-size: 28px; color: var(--text-light); }

/* ===== ORT Cards ===== */
.ort-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ort-card {
  background: var(--bg-white); border-radius: var(--radius-lg);
  padding: 36px; box-shadow: var(--shadow);
  transition: all var(--transition);
  border-top: 4px solid transparent;
}
.ort-card-org { border-top-color: var(--accent-org); }
.ort-card-recht { border-top-color: var(--accent-recht); }
.ort-card-tech { border-top-color: var(--accent-tech); }
.ort-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.ort-icon { font-size: 40px; margin-bottom: 16px; }
.ort-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.ort-card p { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 16px; }
.ort-points { list-style: none; padding: 0; }
.ort-points li {
  padding: 6px 0 6px 24px; position: relative; font-size: 14px; color: var(--text-mid);
}
.ort-points li::before {
  content: '✓'; position: absolute; left: 0;
  color: var(--primary); font-weight: 700;
}

/* ===== Accordion ===== */
.accordion { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.accordion-item {
  background: var(--bg-white); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
  border: 1px solid rgba(0,0,0,0.06);
}
.accordion-header {
  width: 100%; display: flex; align-items: center; gap: 16px;
  padding: 20px 24px; background: none; border: none;
  cursor: pointer; text-align: left; font-size: 16px;
  transition: background var(--transition);
}
.accordion-header:hover { background: rgba(232,82,46,0.03); }
.accordion-phase {
  display: inline-block; padding: 4px 12px; border-radius: 6px;
  background: rgba(232,82,46,0.1); color: var(--primary);
  font-size: 12px; font-weight: 700; white-space: nowrap;
}
.accordion-title { flex: 1; font-weight: 600; color: var(--text-dark); }
.accordion-icon {
  font-size: 20px; font-weight: 700; color: var(--primary);
  transition: transform var(--transition);
  width: 24px; text-align: center;
}
.accordion-item.active .accordion-icon { transform: rotate(45deg); }
.accordion-body {
  max-height: 0; overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 24px;
}
.accordion-item.active .accordion-body { max-height: 2000px; padding: 0 24px 24px; }
.accordion-body h4 { font-size: 16px; font-weight: 700; color: var(--primary); margin: 20px 0 8px; }
.accordion-body h4:first-child { margin-top: 0; }
.accordion-body p { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 12px; }
.accordion-body ul { margin-bottom: 16px; padding-left: 20px; }
.accordion-body li { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 4px; }

/* ===== Standard Cards ===== */
.standard-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.standard-card {
  background: var(--bg-white); border-radius: var(--radius-lg);
  padding: 36px; box-shadow: var(--shadow);
  transition: all var(--transition);
  text-align: center;
}
.standard-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.standard-icon { font-size: 48px; margin-bottom: 16px; }
.standard-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.standard-sub { font-size: 13px; color: var(--primary); font-weight: 600; margin-bottom: 16px; }
.standard-card p { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 16px; }
.standard-card ul { list-style: none; padding: 0; text-align: left; }
.standard-card li {
  padding: 6px 0 6px 24px; position: relative; font-size: 14px; color: var(--text-mid);
}
.standard-card li::before {
  content: '✓'; position: absolute; left: 0;
  color: var(--primary); font-weight: 700;
}

/* ===== Benefits Grid ===== */
.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.benefit-card {
  background: var(--bg-white); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
  text-align: center; transition: all var(--transition);
}
.benefit-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.benefit-icon { font-size: 36px; margin-bottom: 12px; }
.benefit-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.benefit-card p { font-size: 14px; color: var(--text-mid); line-height: 1.6; }

/* ===== Footer ===== */
.footer {
  background: var(--secondary); color: rgba(255,255,255,0.8);
  padding: 60px 24px 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; max-width: 1100px; margin: 0 auto; }
.footer-logo { height: 32px; width: auto; margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-brand p { font-size: 14px; line-height: 1.7; }
.footer h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.footer-links ul { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: rgba(255,255,255,0.7); text-decoration: none; font-size: 14px; transition: color var(--transition); }
.footer-links a:hover { color: var(--primary-light); }
.footer-contact p { font-size: 14px; margin-bottom: 4px; }
.footer-link { color: var(--primary-light); text-decoration: none; font-size: 14px; }
.footer-link:hover { text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0; text-align: center; margin-top: 40px;
  max-width: 1100px; margin-left: auto; margin-right: auto;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.5); }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .ort-cards { grid-template-columns: 1fr; }
  .standard-cards { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: rgba(255,255,255,0.98); padding: 20px; border-bottom: 1px solid rgba(0,0,0,0.06); gap: 16px; align-items: center; }
  .nav-toggle { display: block; }
  .concept-grid { flex-direction: column; }
  .concept-arrow { transform: rotate(90deg); }
  .benefits-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 20px; }
  .hero { padding: 100px 20px 60px; }
}