/* ==========================================================================
   expt.in - Modern Landing Page Stylesheet
   ========================================================================== */

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

/* CSS Variables */
:root {
  --bg-dark: #0a0c10;
  --bg-darker: #050608;
  --bg-card: rgba(13, 17, 28, 0.45);
  --bg-card-hover: rgba(20, 26, 42, 0.65);
  
  /* Borders */
  --border-color: rgba(255, 255, 255, 0.05);
  --border-color-hover: rgba(255, 255, 255, 0.12);
  
  /* Neon Themes */
  --primary: #8b5cf6; /* Electric Violet */
  --primary-glow: rgba(139, 92, 246, 0.35);
  
  --circuit-color: #10b981; /* Emerald/Green */
  --circuit-glow: rgba(16, 185, 129, 0.25);
  
  --physics-color: #06b6d4; /* Cyan/Teal */
  --physics-glow: rgba(6, 182, 212, 0.25);
  
  --process-color: #ec4899; /* Magenta/Pink */
  --process-glow: rgba(236, 72, 153, 0.25);
  
  /* Text */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Fonts */
  --font-header: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
}

/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-darker);
  font-family: var(--font-body);
  color: var(--text-primary);
  overflow-x: hidden;
}

body {
  position: relative;
  min-height: 100vh;
  line-height: 1.6;
}

/* High-Performance Canvas Background */
#canvas-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: all;
  background: radial-gradient(circle at 50% 50%, #0c0f17 0%, var(--bg-darker) 100%);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

/* Typography & General Styles */
h1, h2, h3, h4 {
  font-family: var(--font-header);
  font-weight: 700;
  line-height: 1.2;
}

p {
  color: var(--text-secondary);
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

/* Gradient Text Effect */
.gradient-text {
  background: linear-gradient(135deg, #fff 0%, #a78bfa 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Global Glowing Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-family: var(--font-header);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #6d28d9 100%);
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color-hover);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-bottom: 1px solid transparent;
}

header.scrolled {
  background: rgba(10, 12, 16, 0.75);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
  transition: all 0.4s ease;
}

header.scrolled .container {
  height: 64px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-img {
  height: 32px;
  width: auto;
}

.logo-text {
  font-size: 1.4rem;
  letter-spacing: -0.5px;
  font-weight: 800;
  color: var(--text-primary);
}

.logo-dot {
  color: var(--primary);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

nav a {
  font-family: var(--font-header);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

nav a:hover {
  color: var(--text-primary);
}

.nav-cta {
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  color: var(--primary);
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 12px var(--primary-glow);
}

/* Hero Section */
.hero {
  padding-top: 180px;
  padding-bottom: 100px;
  position: relative;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-header);
  font-weight: 500;
  margin-bottom: 2rem;
  backdrop-filter: blur(5px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--circuit-color);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.9); opacity: 0.6; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.6; }
}

.hero-title {
  font-size: 4rem;
  max-width: 900px;
  margin: 0 auto 1.5rem;
  letter-spacing: -1.5px;
}

.hero-subtitle {
  font-size: 1.25rem;
  max-width: 650px;
  margin: 0 auto 2.5rem;
  color: var(--text-secondary);
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* Feature Showcase Section */
.showcase {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 5rem;
}

.section-tag {
  font-family: var(--font-header);
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  display: block;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.5rem;
  letter-spacing: -0.5px;
  margin-bottom: 1.25rem;
}

.section-subtitle {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Simulator Grid & Columns */
.sim-list {
  display: flex;
  flex-direction: column;
  gap: 8rem;
}

.sim-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.sim-item:nth-child(even) {
  direction: rtl;
}

.sim-item:nth-child(even) .sim-content {
  direction: ltr; /* Reset text direction for content */
}

/* Glassmorphism Mockups */
.sim-mockup-wrapper {
  position: relative;
  border-radius: 16px;
  padding: 8px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  transition: all 0.5s ease;
}

/* Glow highlights per simulator type */
.circuit-item .sim-mockup-wrapper {
  box-shadow: 0 10px 40px rgba(16, 185, 129, 0.05);
}
.physics-item .sim-mockup-wrapper {
  box-shadow: 0 10px 40px rgba(6, 182, 212, 0.05);
}
.process-item .sim-mockup-wrapper {
  box-shadow: 0 10px 40px rgba(236, 72, 153, 0.05);
}

.sim-mockup-wrapper:hover {
  transform: translateY(-5px) scale(1.01);
  border-color: var(--border-color-hover);
}

.circuit-item .sim-mockup-wrapper:hover {
  box-shadow: 0 15px 50px rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
}

.physics-item .sim-mockup-wrapper:hover {
  box-shadow: 0 15px 50px rgba(6, 182, 212, 0.15);
  border-color: rgba(6, 182, 212, 0.3);
}

.process-item .sim-mockup-wrapper:hover {
  box-shadow: 0 15px 50px rgba(236, 72, 153, 0.15);
  border-color: rgba(236, 72, 153, 0.3);
}

.sim-mockup {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
}

/* Glass panel elements inside mockup decoration */
.mockup-header {
  height: 28px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 12px 12px 0 0;
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 6px;
  border-bottom: 1px solid var(--border-color);
}

.mockup-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.sim-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sim-badge {
  align-self: flex-start;
  padding: 0.3rem 0.8rem;
  border-radius: 6px;
  font-family: var(--font-header);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.circuit-badge {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--circuit-color);
}

.physics-badge {
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.2);
  color: var(--physics-color);
}

.process-badge {
  background: rgba(236, 72, 153, 0.1);
  border: 1px solid rgba(236, 72, 153, 0.2);
  color: var(--process-color);
}

.sim-name {
  font-size: 2.2rem;
  letter-spacing: -0.5px;
}

.sim-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.sim-features {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 0.5rem 0;
}

.sim-features li {
  position: relative;
  padding-left: 2rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.sim-features li::before {
  content: "✦";
  position: absolute;
  left: 0.5rem;
  top: 0;
}

.circuit-item .sim-features li::before { color: var(--circuit-color); }
.physics-item .sim-features li::before { color: var(--physics-color); }
.process-item .sim-features li::before { color: var(--process-color); }

.sim-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin-top: 1rem;
}

/* Technology Stack Section */
.tech-stack {
  padding: 100px 0;
  position: relative;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 4rem;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
}

.tech-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.tech-icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  display: block;
}

.tech-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.2px;
}

.tech-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Open Source Call to Action */
.open-source-pledge {
  padding: 120px 0;
  position: relative;
  text-align: center;
}

.pledge-card {
  max-width: 900px;
  margin: 0 auto;
  padding: 5rem 4rem;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.05) 0%, rgba(6, 182, 212, 0.02) 100%);
  border: 1px solid rgba(139, 92, 246, 0.15);
  backdrop-filter: blur(15px);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(139, 92, 246, 0.05);
}

.pledge-card::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.03) 0%, transparent 60%);
  pointer-events: none;
}

.pledge-title {
  font-size: 3rem;
  letter-spacing: -1px;
  margin-bottom: 1.5rem;
}

.pledge-desc {
  font-size: 1.15rem;
  max-width: 650px;
  margin: 0 auto 2.5rem;
  color: var(--text-secondary);
}

.pledge-ctas {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* Footer */
footer {
  padding: 5rem 0 3rem;
  border-top: 1px solid var(--border-color);
  position: relative;
  background-color: var(--bg-darker);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-logo {
  font-family: var(--font-header);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.footer-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 320px;
}

.footer-links h4 {
  font-size: 1rem;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--text-primary);
  padding-left: 4px;
}

.footer-newsletter h4 {
  font-size: 1rem;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-newsletter p {
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
}

.newsletter-input {
  flex: 1;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color-hover);
  padding: 0.6rem 1rem;
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: all 0.3s ease;
}

.newsletter-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow);
}

.newsletter-btn {
  background: var(--primary);
  border: none;
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  font-family: var(--font-header);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.newsletter-btn:hover {
  background: #6d28d9;
  box-shadow: 0 4px 10px var(--primary-glow);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
}

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

.footer-social {
  display: flex;
  gap: 1.5rem;
}

.social-link {
  font-size: 1.1rem;
  color: var(--text-muted);
}

.social-link:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   Animations & Scroll Reveal Effects
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1), 
              transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Speed/Delay offsets */
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }
.delay-400 { transition-delay: 400ms; }

/* Responsive adjustments */
@media (max-width: 1024px) {
  .sim-item {
    gap: 3rem;
  }
  .sim-name {
    font-size: 1.8rem;
  }
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  header .container {
    height: 70px;
  }
  
  nav {
    display: none; /* In a responsive design, we'd add a drawer, but we keep this static navbar sleek for primary features */
  }
  
  .hero-title {
    font-size: 2.75rem;
    letter-spacing: -1px;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .sim-item {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .sim-item:nth-child(even) {
    direction: ltr;
  }
  
  .pledge-card {
    padding: 3rem 2rem;
  }
  
  .pledge-title {
    font-size: 2.2rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .footer-brand {
    align-items: center;
    text-align: center;
  }
  
  .footer-desc {
    max-width: 100%;
  }
  
  .footer-links {
    text-align: center;
  }
  
  .footer-newsletter {
    text-align: center;
  }
  
  .newsletter-form {
    max-width: 400px;
    margin: 0 auto;
  }
  
  .footer-bottom {
    flex-direction: column-reverse;
    gap: 1.5rem;
    text-align: center;
  }
}

/* ==========================================================================
   Interactive Mockup Image Toggles
   ========================================================================== */

.sim-mockup-wrapper {
  position: relative;
}

.sim-mockup {
  transition: opacity 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.sim-mockup.fade-out {
  opacity: 0.05;
}

/* Glassmorphic Toggle Badge */
.mockup-toggle-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 10;
  display: inline-flex;
  background: rgba(10, 12, 16, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 30px;
  padding: 3px;
  font-family: var(--font-header);
  font-size: 0.72rem;
  font-weight: 600;
  user-select: none;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  direction: ltr; /* Ensure layout direction is always LTR even in RTL flex rows */
}

.mockup-toggle-badge:hover {
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  transform: scale(1.02);
}

.badge-option {
  padding: 4px 11px;
  border-radius: 20px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.badge-option:hover {
  color: var(--text-primary);
}

/* Color Coding of Badges based on product area */
.circuit-item .badge-option.active {
  background: var(--circuit-color);
  color: #fff;
  box-shadow: 0 2px 8px var(--circuit-glow);
}

.physics-item .badge-option.active {
  background: var(--physics-color);
  color: #fff;
  box-shadow: 0 2px 8px var(--physics-glow);
}

.process-item .badge-option.active {
  background: var(--process-color);
  color: #fff;
  box-shadow: 0 2px 8px var(--process-glow);
}


/* ==========================================================================
   AI World Models Section
   ========================================================================== */

.ai-agents {
  padding: 100px 0;
  position: relative;
}

.ai-content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 4rem;
}

.ai-column {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 3rem 2.5rem;
  border-radius: 16px;
  backdrop-filter: blur(12px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.ai-column:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(139, 92, 246, 0.03);
}

.ai-subheading {
  font-size: 1.5rem;
  letter-spacing: -0.3px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
}

.ai-subheading i {
  color: var(--primary);
  text-shadow: 0 0 10px var(--primary-glow);
}

.ai-paragraph {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.ai-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.5rem;
}

.ai-bullets li {
  position: relative;
  padding-left: 2rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.ai-bullets li::before {
  content: "⚡";
  position: absolute;
  left: 0.5rem;
  top: 0;
  color: var(--primary);
  text-shadow: 0 0 8px var(--primary-glow);
}

/* Responsive adjustments for AI Models */
@media (max-width: 1024px) {
  .ai-content-grid {
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .ai-content-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .ai-column {
    padding: 2rem;
  }
}

/* ==========================================================================
   AI Column SVG Graphic Animations
   ========================================================================== */

.ai-graphic-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.ai-svg-graphic {
  max-width: 320px;
  width: 100%;
  height: auto;
}

/* SVG Animations */
@keyframes svg-flow {
  0% { stroke-dashoffset: 190; }
  100% { stroke-dashoffset: 0; }
}

.svg-flow-line {
  animation: svg-flow 4.5s linear infinite;
}

@keyframes cog-pulse {
  0% { transform: scale(0.85); opacity: 0.4; }
  50% { transform: scale(1.08); opacity: 0.95; }
  100% { transform: scale(0.85); opacity: 0.4; }
}

.cog-inner-pulse {
  animation: cog-pulse 3s ease-in-out infinite;
  transform-origin: center;
}

@keyframes box-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.svg-box-spin {
  animation: box-spin 10s linear infinite;
  transform-origin: center;
  transform-box: fill-box;
}

/* Premium Repository Modal Overlay styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 6, 8, 0.7);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: linear-gradient(135deg, rgba(20, 22, 28, 0.95) 0%, rgba(10, 12, 16, 0.98) 100%);
  border: 1px solid var(--border-color);
  width: 90%;
  max-width: 580px;
  border-radius: 16px;
  padding: 2.5rem 2rem;
  position: relative;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
  transform: scale(0.9) translateY(20px);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-card {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.75rem;
  cursor: pointer;
  transition: color 0.2s ease;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-header {
  margin-bottom: 2rem;
  text-align: left;
}

.modal-title {
  font-size: 1.8rem;
  letter-spacing: -0.5px;
  margin-bottom: 0.5rem;
}

.modal-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.modal-repo-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 10px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: all 0.3s ease;
  text-align: left;
}

.modal-repo-card:hover {
  background: rgba(255, 255, 255, 0.04);
}

.circuit-card-glow:hover {
  border-color: rgba(16, 185, 129, 0.25);
  box-shadow: 0 5px 20px rgba(16, 185, 129, 0.05);
}

.physics-card-glow:hover {
  border-color: rgba(6, 182, 212, 0.25);
  box-shadow: 0 5px 20px rgba(6, 182, 212, 0.05);
}

.process-card-glow:hover {
  border-color: rgba(236, 72, 153, 0.25);
  box-shadow: 0 5px 20px rgba(236, 72, 153, 0.05);
}

.repo-info {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.repo-icon {
  font-size: 1.5rem;
  padding-top: 0.2rem;
}

.repo-name {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
  font-family: var(--font-header);
}

.repo-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.repo-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.clone-box {
  display: flex;
  flex: 1;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.clone-input {
  flex: 1;
  background: none;
  border: none;
  padding: 0.5rem 0.75rem;
  color: var(--text-secondary);
  font-family: monospace;
  font-size: 0.8rem;
  outline: none;
}

.btn-copy {
  background: rgba(255, 255, 255, 0.05);
  border: none;
  border-left: 1px solid var(--border-color);
  padding: 0 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-copy:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.btn-open-repo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.btn-open-repo:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 10px var(--primary-glow);
}