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

/* Base styles with modern resets */
:root {
  /* UGA Color Palette */
  --primary-color: #BA0C2F; /* Bulldog Red */
  --primary-light: #d40e38; /* Lighter Bulldog Red */
  --primary-dark: #9a0a27; /* Darker Bulldog Red */
  --secondary-color: #000000; /* Arch Black */
  --secondary-light: #333333; /* Lighter Black */
  --accent-color: #FFFFFF; /* Chapel Bell White */
  --text-primary: #000000; /* Black text */
  --text-secondary: #333333; /* Dark gray text */
  --background-light: #f8f9fa; /* Light background */
  --card-background: #ffffff; /* White background */
  --shadow-light: 0 5px 15px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 10px 25px rgba(0, 0, 0, 0.12);
  --shadow-hover: 0 15px 35px rgba(0, 0, 0, 0.18);
  --transition-fast: 0.3s ease;
  --transition-medium: 0.5s ease;
  --border-radius-small: 8px;
  --border-radius-medium: 16px;
  --border-radius-large: 24px;
}

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

body {
  font-family: 'Poppins', sans-serif;
  color: var(--text-primary);
  background-color: var(--background-light);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

/* Modern card styles with enhanced depth */
.card {
  background-color: var(--card-background);
  border-radius: var(--border-radius-medium);
  box-shadow: var(--shadow-light);
  padding: 0;
  margin-bottom: 40px;
  transition: transform 0.4s, box-shadow 0.4s;
  overflow: hidden;
  position: relative;
}

.card:hover {
  box-shadow: var(--shadow-medium);
}

.main-card {
  position: relative;
}

.main-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  z-index: 5;
}

/* Hero section styles */
.hero-section {
  position: relative;
  padding: 80px 40px 40px;
  text-align: center;
  background: linear-gradient(135deg, rgba(186, 12, 47, 0.05) 0%, rgba(0, 0, 0, 0.05) 100%);
  overflow: hidden;
  margin-bottom: 60px;
  border-bottom: 3px solid var(--primary-color);
}

.main-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 42px;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 40px;
  position: relative;
  z-index: 2;
  color: var(--primary-color);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.title-underline {
  width: 150px;
  height: 6px;
  background: var(--secondary-color);
  margin: 0 auto;
  border-radius: 3px;
  position: relative;
  z-index: 2;
}

/* Animated particles */
.animated-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 1;
}

.particle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.6;
  transition: transform 0.8s var(--transition-medium);
}

.p1 {
  width: 50px;
  height: 50px;
  top: 20%;
  right: 15%;
  background: radial-gradient(circle at 30% 30%, rgba(186, 12, 47, 0.9), rgba(186, 12, 47, 0.3));
  animation: float 12s infinite ease-in-out;
}

.p2 {
  width: 25px;
  height: 25px;
  top: 30%;
  right: 25%;
  background: radial-gradient(circle at 30% 30%, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.3));
  animation: float 10s infinite ease-in-out 1s;
}

.p3 {
  width: 70px;
  height: 70px;
  top: 25%;
  right: 35%;
  background: radial-gradient(circle at 30% 30%, rgba(186, 12, 47, 0.9), rgba(186, 12, 47, 0.2));
  animation: float 14s infinite ease-in-out 2s;
}

.p4 {
  width: 35px;
  height: 35px;
  top: 40%;
  right: 45%;
  background: radial-gradient(circle at 30% 30%, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.3));
  animation: float 9s infinite ease-in-out 3s;
}

.p5 {
  width: 40px;
  height: 40px;
  top: 15%;
  left: 20%;
  background: radial-gradient(circle at 30% 30%, rgba(186, 12, 47, 0.9), rgba(186, 12, 47, 0.3));
  animation: float 11s infinite ease-in-out 1.5s;
}

.p6 {
  width: 30px;
  height: 30px;
  top: 40%;
  left: 30%;
  background: radial-gradient(circle at 30% 30%, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.3));
  animation: float 13s infinite ease-in-out 2.5s;
}

.p7 {
  width: 20px;
  height: 20px;
  top: 30%;
  left: 40%;
  background: radial-gradient(circle at 30% 30%, rgba(186, 12, 47, 0.9), rgba(186, 12, 47, 0.2));
  animation: float 8s infinite ease-in-out 3.5s;
}

.p8 {
  width: 60px;
  height: 60px;
  top: 35%;
  left: 15%;
  background: radial-gradient(circle at 30% 30%, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.2));
  animation: float 15s infinite ease-in-out 4s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) translateX(0) rotate(0deg);
    opacity: 0.6;
  }
  25% {
    transform: translateY(-30px) translateX(20px) rotate(5deg);
    opacity: 0.8;
  }
  50% {
    transform: translateY(10px) translateX(-20px) rotate(-5deg);
    opacity: 0.4;
  }
  75% {
    transform: translateY(25px) translateX(10px) rotate(3deg);
    opacity: 0.7;
  }
}

/* Content sections */
.content-section {
  padding: 40px;
  position: relative;
  margin-bottom: 60px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.section-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 32px;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  position: relative;
}

.title-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary-color);
  border-radius: 50%;
  color: white;
  margin-right: 15px;
  box-shadow: 0 4px 8px rgba(186, 12, 47, 0.3);
}

.title-line {
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 100px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 2px;
}

.description {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 30px;
  padding-left: 55px;
}

/* Interactive demo elements */
.interactive-element {
  width: 100%;
  height: 180px;
  margin: 30px 0;
  padding: 20px;
  background-color: rgba(25, 118, 210, 0.05);
  border-radius: var(--border-radius-small);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition-fast);
}

.interactive-element:hover {
  box-shadow: var(--shadow-medium);
}

.demo-button {
  position: absolute;
  bottom: 20px;
  left: 20px;
  z-index: 5;
}

.play-demo-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 30px;
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 4px 8px rgba(186, 12, 47, 0.3);
  transition: var(--transition-fast);
}

.play-demo-btn:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 12px rgba(186, 12, 47, 0.4);
  transform: translateY(-3px);
}

.play-demo-btn:active {
  transform: translateY(0);
}

/* Self-organization demo */
.self-org-demo {
  position: relative;
}

.demo-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: var(--transition-medium);
}

.demo-particle {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--primary-color);
  transition: all 0.5s ease;
  opacity: 0.8;
}

.demo-particles.active .demo-particle {
  animation: organize 3s infinite ease-in-out;
}

.dp1 { top: 20%; left: 30%; background-color: var(--primary-color); }
.dp2 { top: 50%; left: 40%; background-color: var(--secondary-color); }
.dp3 { top: 70%; left: 25%; background-color: var(--primary-color); }
.dp4 { top: 40%; left: 60%; background-color: var(--secondary-color); }
.dp5 { top: 60%; left: 75%; background-color: var(--primary-color); }
.dp6 { top: 30%; left: 85%; background-color: var(--secondary-color); }
.dp7 { top: 80%; left: 55%; background-color: var(--primary-color); }
.dp8 { top: 25%; left: 15%; background-color: var(--secondary-color); }
.dp9 { top: 45%; left: 90%; background-color: var(--primary-color); }
.dp10 { top: 75%; left: 10%; background-color: var(--secondary-color); }

.demo-particles.active .dp1 { animation-delay: 0.1s; }
.demo-particles.active .dp2 { animation-delay: 0.2s; }
.demo-particles.active .dp3 { animation-delay: 0.3s; }
.demo-particles.active .dp4 { animation-delay: 0.4s; }
.demo-particles.active .dp5 { animation-delay: 0.5s; }
.demo-particles.active .dp6 { animation-delay: 0.6s; }
.demo-particles.active .dp7 { animation-delay: 0.7s; }
.demo-particles.active .dp8 { animation-delay: 0.8s; }
.demo-particles.active .dp9 { animation-delay: 0.9s; }
.demo-particles.active .dp10 { animation-delay: 1.0s; }

@keyframes organize {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(50%, -30px) scale(1.3);
  }
  100% {
    transform: translate(0, 0) scale(1);
  }
}

/* 4D printing demo */
.four-d-demo {
  position: relative;
}

.shape-morph {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.shape-container {
  position: relative;
  width: 150px;
  height: 150px;
  transition: var(--transition-medium);
}

.shape {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: all 0.8s ease-in-out;
}

.shape-original {
  background-color: var(--primary-color);
  clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
  z-index: 2;
  opacity: 1;
}

.shape-morphed {
  background-color: var(--secondary-color);
  clip-path: circle(50% at 50% 50%);
  z-index: 1;
  opacity: 0;
  transform: scale(0.8);
}

.shape-container.morphing .shape-original {
  opacity: 0;
  transform: rotate(180deg) scale(0.8);
}

.shape-container.morphing .shape-morphed {
  opacity: 1;
  transform: scale(1);
}

/* Applications section */
.applications-section {
  padding: 40px;
  position: relative;
}

.applications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
  margin-top: 30px;
}

.application-box {
  background-color: var(--card-background);
  border-radius: var(--border-radius-small);
  padding: 30px 25px;
  box-shadow: var(--shadow-light);
  transition: var(--transition-medium);
  position: relative;
  overflow: hidden;
  z-index: 1;
  height: 100%;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.application-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(25, 118, 210, 0.05) 0%, rgba(3, 169, 244, 0.05) 100%);
  z-index: -1;
  opacity: 0;
  transition: var(--transition-medium);
}

.application-box.hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.application-box.hover::before {
  opacity: 1;
}

.app-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-color);
  color: white;
  font-size: 24px;
  border-radius: 15px;
  margin-bottom: 20px;
  box-shadow: 0 5px 15px rgba(186, 12, 47, 0.2);
  transition: var(--transition-medium);
}

.application-box.hover .app-icon {
  transform: rotate(10deg) scale(1.1);
  box-shadow: 0 8px 20px rgba(186, 12, 47, 0.3);
}

.application-box h4 {
  font-family: 'Montserrat', sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: 12px;
  transition: var(--transition-fast);
}

.application-box p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
}

.app-hover-info {
  position: absolute;
  bottom: -40px;
  left: 0;
  width: 100%;
  padding: 10px;
  background-color: var(--secondary-color);
  color: white;
  text-align: center;
  transition: var(--transition-medium);
  opacity: 0;
}

.application-box.hover .app-hover-info {
  bottom: 0;
  opacity: 1;
}

/* Video gallery */
.resources-section {
  padding: 40px;
  position: relative;
}

.video-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 30px;
}

.video-card {
  background-color: var(--card-background);
  border-radius: var(--border-radius-small);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition-medium);
  cursor: pointer;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.video-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.video-thumbnail {
  position: relative;
  height: 180px;
  overflow: hidden;
}

.video-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s;
}

.video-card:hover .video-thumbnail img {
  transform: scale(1.05);
}

.play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background-color: rgba(186, 12, 47, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-medium);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.play-button .play-icon {
  color: white;
  font-size: 24px;
}

.video-card:hover .play-button {
  background-color: var(--primary-dark);
  transform: translate(-50%, -50%) scale(1.1);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.video-info {
  padding: 20px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.video-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.video-description {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 15px;
  flex-grow: 1;
}

.video-meta {
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 13px;
}

.video-meta span {
  display: flex;
  align-items: center;
}

.video-meta span i {
  margin-right: 5px;
  color: var(--primary-color);
}

/* CTA section */
.next-section {
  padding: 40px;
  position: relative;
}

.cta-container {
  background: var(--primary-color);
  padding: 50px;
  border-radius: var(--border-radius-medium);
  text-align: center;
  color: white;
  box-shadow: var(--shadow-medium);
  position: relative;
  overflow: hidden;
  border: 2px solid var(--secondary-color);
}

.cta-container::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
  animation: pulse-bg 6s infinite linear;
  z-index: 0;
}

@keyframes pulse-bg {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 0.1;
  }
  50% {
    transform: translate(-25%, -25%) scale(1.2);
    opacity: 0.2;
  }
  100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.1;
  }
}

.cta-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.cta-description {
  font-size: 18px;
  margin-bottom: 30px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.button-container {
  position: relative;
  z-index: 1;
  display: inline-block;
}

.simulator-button {
  background-color: var(--secondary-color);
  color: white;
  font-weight: 600;
  padding: 16px 40px;
  border-radius: 40px;
  border: 2px solid white;
  font-size: 18px;
  font-family: 'Poppins', sans-serif;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  position: relative;
  overflow: hidden;
}

.simulator-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: translateX(-100%);
}

.simulator-button:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  background-color: var(--secondary-light);
}

.simulator-button:hover::before {
  animation: button-shine 1.5s infinite;
}

@keyframes button-shine {
  100% {
    transform: translateX(100%);
  }
}

.simulator-button:active {
  transform: translateY(0);
}

.button-icon {
  transition: transform 0.3s ease;
}

.simulator-button:hover .button-icon {
  transform: translateX(5px);
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .main-title {
    font-size: 36px;
  }
  
  .applications-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .video-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .content-section, .applications-section, .resources-section, .next-section {
    padding: 30px;
  }
}

@media (max-width: 768px) {
  .main-title {
    font-size: 30px;
  }
  
  .section-title {
    font-size: 26px;
  }
  
  .description {
    font-size: 16px;
    padding-left: 0;
  }
  
  .applications-grid, .video-gallery {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .content-section, .applications-section, .resources-section, .next-section {
    padding: 25px;
  }
  
  .hero-section {
    padding: 60px 25px 30px;
  }
  
  .interactive-element {
    height: 150px;
  }
  
  .cta-container {
    padding: 30px;
  }
  
  .cta-title {
    font-size: 24px;
  }
  
  .cta-description {
    font-size: 16px;
  }
  
  .simulator-button {
    padding: 14px 30px;
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .main-title {
    font-size: 26px;
  }
  
  .title-icon {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }
  
  .section-title {
    font-size: 22px;
  }
  
  .content-section, .applications-section, .resources-section, .next-section {
    padding: 20px;
  }
  
  .interactive-element {
    height: 120px;
  }
  
  .play-demo-btn {
    padding: 10px 20px;
    font-size: 14px;
  }
  
  .app-icon {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }
  
  .application-box h4 {
    font-size: 18px;
  }
  
  .cta-title {
    font-size: 22px;
  }
}

/* Additional animations for interactive elements */
.fade-in {
  animation: fadeIn 1s forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Loading animation for page transition */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--card-background);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 5px solid rgba(25, 118, 210, 0.2);
  border-top: 5px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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