/* ==========================================================================
   WIRBELROHR - Apple MacPro Style Design System
   Hochschule Niederrhein | Prof. Dr.-Ing. Schettel & Prof. Dr.-Ing. Deutges
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;600;700;800;900&display=swap');

:root {
  /* Color Palette - Deep Dark Mode Mac Pro Aesthetic */
  --bg-dark: #0a0a0c;
  --bg-surface: #121214;
  --bg-card: rgba(26, 26, 30, 0.65);
  --bg-card-hover: rgba(36, 36, 42, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-glass-strong: rgba(255, 255, 255, 0.08);
  
  /* Accent Colors - Neon & Thermal Glow */
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-cold: #00dbde;
  --accent-warm: #ff0844;
  --accent-orange: #ffb199;
  --accent-green: #00ff87;
  
  /* Gradients */
  --grad-cyan-blue: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
  --grad-thermal: linear-gradient(90deg, var(--accent-cold) 0%, #4facfe 40%, #ffb199 70%, var(--accent-warm) 100%);
  --grad-cold: linear-gradient(135deg, #00dbde 0%, #fc00ff 100%);
  --grad-warm: linear-gradient(135deg, #ff0844 0%, #ffb199 100%);
  --grad-text: linear-gradient(180deg, #ffffff 0%, #a1a1a6 100%);
  --grad-text-glow: linear-gradient(90deg, #00f2fe 0%, #4facfe 50%, #00ff87 100%);
  
  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Text Colors */
  --text-main: #f5f5f7;
  --text-muted: #86868b;
  --text-dark: #1d1d1f;
  
  /* Borders & Shadows */
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(0, 242, 254, 0.4);
  --border-thermal: rgba(255, 8, 68, 0.4);
  --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 35px rgba(0, 242, 254, 0.25);
  --shadow-glow-warm: 0 0 35px rgba(255, 8, 68, 0.25);
  
  /* Radii & Transitions */
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--text-main);
}

body {
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% -10%, #1c1c2b 0%, var(--bg-dark) 65%);
  min-height: 100vh;
}

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

ul {
  list-style: none;
}

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

/* ==========================================================================
   Typography & Utility Classes
   ========================================================================== */
h1, h2, h3, h4, .font-display {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-cyan {
  background: var(--grad-cyan-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-thermal {
  background: var(--grad-thermal);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-cyan);
  margin-bottom: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.section-tag::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.section-title {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

.section-subtitle {
  font-size: clamp(1.1rem, 1.5vw, 1.35rem);
  color: var(--text-muted);
  max-width: 750px;
  margin: 0 auto 3.5rem auto;
  font-weight: 400;
}

.text-center {
  text-align: center;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-padding {
  padding: 7rem 0;
  position: relative;
}

/* Glassmorphism Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.3);
  margin-bottom: 1.5rem;
}

.badge-warm {
  background: rgba(255, 8, 68, 0.1);
  color: #ff4b72;
  border-color: rgba(255, 8, 68, 0.3);
}

.badge-cold {
  background: rgba(0, 219, 222, 0.1);
  color: var(--accent-cold);
  border-color: rgba(0, 219, 222, 0.3);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10, 10, 12, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition-smooth);
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}

.nav-brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--grad-thermal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 900;
  color: #000;
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--grad-cyan-blue);
  transition: var(--transition-smooth);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-lab-logo img {
  display: block;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), filter 0.25s ease;
}

.nav-lab-logo:hover img {
  transform: scale(1.06);
  filter: brightness(1.15);
  box-shadow: 0 4px 14px rgba(255, 255, 255, 0.15);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 11rem 0 6rem 0;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.hero-glow-1 {
  position: absolute;
  top: 15%;
  left: 20%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(0, 219, 222, 0.18) 0%, transparent 70%);
  filter: blur(60px);
  z-index: -1;
  pointer-events: none;
}

.hero-glow-2 {
  position: absolute;
  top: 25%;
  right: 20%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(255, 8, 68, 0.16) 0%, transparent 70%);
  filter: blur(60px);
  z-index: -1;
  pointer-events: none;
}

.hero-title {
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero-desc {
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 3rem auto;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  align-items: center;
  margin-bottom: 5rem;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--text-main);
  color: var(--bg-dark);
  padding: 1rem 2.2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.05rem;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  background: #ffffff;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 40px rgba(255, 255, 255, 0.25);
  color: #000;
}

.btn-secondary {
  background: var(--bg-glass-strong);
  color: var(--text-main);
  padding: 1rem 2.2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.05rem;
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
  transition: var(--transition-smooth);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-3px);
}

/* Hero KPI Grid */
.hero-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  backdrop-filter: blur(20px);
  transition: var(--transition-smooth);
  text-align: center;
}

.kpi-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glass-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.kpi-num {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  line-height: 1;
}

.kpi-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.kpi-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Section: Grundlagen & Prinzip (Interactive Diagram & Application)
   ========================================================================== */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  backdrop-filter: blur(20px);
  transition: var(--transition-smooth);
}

.feature-box:hover {
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
}

.image-showcase {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  background: #151518;
}

.image-showcase img {
  width: 100%;
  height: auto;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.image-showcase:hover img {
  transform: scale(1.03);
}

.image-caption {
  padding: 1rem 1.25rem;
  background: rgba(18, 18, 20, 0.9);
  border-top: 1px solid var(--border-glass);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Interactive Tabs for Erklärungsmodelle */
.models-tabs-wrapper {
  margin-top: 4rem;
}

.tabs-nav {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.tab-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  padding: 0.7rem 1.4rem;
  border-radius: 50px;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.35;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.tab-sub {
  display: block;
  font-size: 0.82em;
  font-weight: 400;
  opacity: 0.75;
  margin-top: 0.2rem;
}

.tab-btn:hover {
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.25);
}

.tab-btn.active {
  background: var(--text-main);
  color: var(--bg-dark);
  border-color: var(--text-main);
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.2);
}

.tab-btn.active .tab-sub {
  opacity: 0.85;
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease forwards;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.model-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 3rem;
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.model-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: var(--grad-cyan-blue);
}

.model-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.model-title {
  font-size: 1.8rem;
  color: var(--text-main);
}

.model-author {
  font-size: 0.9rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

/* ==========================================================================
   Section: Strömungstechnische Grundlagen & Simulation
   ========================================================================== */
.cfd-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.cfd-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.cfd-card:hover {
  border-color: var(--border-glass-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-sm);
}

.cfd-card h3 {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.cfd-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.cfd-meta-list {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.cfd-meta-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
}

.cfd-meta-item span:first-child {
  color: var(--text-muted);
}

.cfd-meta-item span:last-child {
  color: var(--text-main);
  font-weight: 600;
}

/* ==========================================================================
   Section: Prüfstandsaufbau
   ========================================================================== */
.timeline-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 3.5rem;
}

.pruefstand-feature {
  background: rgba(18, 18, 20, 0.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  transition: var(--transition-smooth);
}

.pruefstand-feature:hover {
  border-color: rgba(0, 242, 254, 0.35);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.formula-box {
  background: rgba(10, 10, 12, 0.9);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.5rem 0;
  text-align: center;
  font-family: 'Courier New', Courier, monospace;
  color: var(--accent-cyan);
  font-size: 1.1rem;
  overflow-x: auto;
}

/* ==========================================================================
   Section: BA Wertenbruch (Deep Dive & Numerische Analyse)
   ========================================================================== */
.ba-carousel-container {
  width: 100%;
}

.ba-carousel-nav {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.carousel-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  padding: 0.65rem 1.3rem;
  border-radius: 50px;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.carousel-btn:hover {
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.25);
}

.carousel-btn.active {
  background: var(--accent-cyan);
  color: #000;
  border-color: var(--accent-cyan);
  box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
}

.ba-slide {
  display: none;
  animation: fadeIn 0.4s ease forwards;
}

.ba-slide.active {
  display: block;
}

/* ==========================================================================
   Application Carousel (Section 1b)
   ========================================================================== */
.app-carousel-container {
  max-width: 1100px;
  margin: 3rem auto 0;
}
.app-carousel-nav {
  display: flex;
  gap: 0.65rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.app-carousel-btn {
  background: rgba(22, 22, 26, 0.85);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  padding: 0.65rem 1.25rem;
  border-radius: 50px;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.app-carousel-btn:hover {
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.28);
  transform: translateY(-2px);
}
.app-carousel-btn.active {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #0099ff 100%);
  color: #000;
  border-color: var(--accent-cyan);
  box-shadow: 0 6px 20px rgba(0, 240, 255, 0.35);
  font-weight: 700;
}
.app-slide {
  display: none;
  animation: fadeIn 0.45s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.app-slide.active {
  display: block;
}
.app-slide-card {
  background: rgba(20, 20, 24, 0.85);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: center;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
}
.app-slide-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  max-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.app-slide-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.app-slide-card:hover .app-slide-image img {
  transform: scale(1.04);
}
.app-slide-content h3 {
  font-size: 1.85rem;
  margin-bottom: 1.2rem;
  color: #fff;
  line-height: 1.25;
}
.app-feature-list {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.app-feature-item {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  color: var(--text-muted);
  line-height: 1.55;
  font-size: 0.96rem;
}
.app-feature-icon {
  color: var(--accent-cyan);
  font-weight: bold;
  font-size: 1.1rem;
  line-height: 1.3;
}
.app-feature-item strong {
  color: #e4e4e7;
}
@media (max-width: 950px) {
  .app-slide-card {
    grid-template-columns: 1fr;
    padding: 1.8rem;
    gap: 2rem;
  }
  .app-slide-image {
    max-height: 260px;
  }
}

/* ==========================================================================
   Interactive Simulator Section
   ========================================================================== */
.simulator-card {
  background: linear-gradient(145deg, rgba(26, 26, 30, 0.85) 0%, rgba(18, 18, 22, 0.95) 100%);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: var(--radius-xl);
  padding: 3.5rem;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), 0 0 40px rgba(0, 242, 254, 0.12);
  margin-top: 3rem;
}

.simulator-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.control-label {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-main);
}

.control-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 0.3rem 0.8rem;
  border-radius: 8px;
  border: 1px solid rgba(0, 242, 254, 0.3);
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  transition: var(--transition-fast);
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--text-main);
  cursor: pointer;
  box-shadow: 0 0 15px var(--accent-cyan);
  transition: transform 0.2s ease;
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.simulator-results {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 3rem;
}

.result-box {
  background: rgba(10, 10, 12, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: var(--transition-smooth);
}

.result-box.cold {
  border-color: rgba(0, 219, 222, 0.4);
  background: radial-gradient(circle at 50% 0%, rgba(0, 219, 222, 0.1) 0%, rgba(10, 10, 12, 0.8) 70%);
}

.result-box.warm {
  border-color: rgba(255, 8, 68, 0.4);
  background: radial-gradient(circle at 50% 0%, rgba(255, 8, 68, 0.1) 0%, rgba(10, 10, 12, 0.8) 70%);
}

.result-num {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 900;
  margin: 0.5rem 0;
  line-height: 1;
}

.result-title {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

/* ==========================================================================
   Credits & Team Section (In Anlehnung an Boostbike)
   ========================================================================== */
.credits-section {
  background: rgba(18, 18, 20, 0.45);
  border-top: 1px solid var(--border-glass);
}

.credit-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 2.8rem;
  margin-bottom: 2.5rem;
  backdrop-filter: blur(20px);
  transition: var(--transition-smooth);
}

.credit-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
}

.credit-badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: rgba(0, 242, 254, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.3);
  margin-bottom: 1.2rem;
}

.leadership-card {
  background: linear-gradient(135deg, rgba(26, 26, 32, 0.9) 0%, rgba(20, 20, 26, 0.95) 100%);
  border-color: rgba(0, 242, 254, 0.3);
}

.prof-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.prof-item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: var(--transition-smooth);
}

.prof-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent-cyan);
  transform: translateX(6px);
}

.prof-avatar {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: var(--grad-cyan-blue);
  color: #000;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.3);
}

.prof-info strong {
  display: block;
  font-size: 1.15rem;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}

.prof-info span {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.student-blocks-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2.5rem;
}

.student-principle-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.principle-card-header {
  margin-bottom: 1.8rem;
}

.principle-card-header h3 {
  font-size: 1.35rem;
  margin-bottom: 0.6rem;
}

.credit-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.team-subgroup {
  margin-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 1.2rem;
}

.team-sub-title {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 0.8rem;
  font-weight: 600;
}

.student-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.45rem;
}

.student-list li {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.student-list li::before {
  content: '•';
  color: var(--accent-cyan);
  font-weight: bold;
}

.compact-credits-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2.5rem;
  align-items: start;
}

.compact-credit-card {
  background: rgba(20, 20, 24, 0.85);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-xl);
  padding: 2.2rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
}

.compact-prof-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.compact-prof-row {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  padding: 1.1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  transition: var(--transition-smooth);
}

.compact-prof-row:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent-cyan);
  transform: translateX(4px);
}

.compact-teams-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.compact-team-block {
  padding-bottom: 1.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.compact-team-block:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.compact-topic-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  margin-bottom: 0.6rem;
  line-height: 1.55;
}

.compact-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.55rem;
}

.compact-pill-group span {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  padding: 0.35rem 0.85rem;
  border-radius: 50px;
  font-size: 0.84rem;
  color: #e4e4e7;
  transition: var(--transition-smooth);
}

.compact-pill-group span:hover {
  background: rgba(0, 242, 254, 0.12);
  border-color: var(--accent-cyan);
  color: #fff;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  padding: 5rem 0 3rem 0;
  background: #060608;
  border-top: 1px solid var(--border-glass);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3.5rem;
  margin-bottom: 3.5rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-col h4 {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 1.4rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

.footer-col a:hover, .footer-bottom a:hover {
  color: var(--accent-cyan) !important;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .grid-2, .timeline-grid, .simulator-controls, .prof-grid, .footer-grid, .compact-credits-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .student-blocks-grid {
    grid-template-columns: 1fr;
  }
  
  .simulator-results {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .section-padding {
    padding: 4.5rem 0;
  }
  
  .hero {
    padding: 8.5rem 0 4rem 0;
  }
  
  .model-card, .simulator-card, .credit-card {
    padding: 1.8rem;
  }
}