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

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background-color: #fff;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Navbar */
.top-header {
  background-color: white;
  border-bottom: 1px solid #e0e0e0;
  padding: 1rem 0;
}

.nav-container {
  max-width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
}

.logo {
  font-weight: 800;
  font-size: 1.5rem;
  color: #05445E;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links li a {
  color: #05445E;
  font-weight: 600;
  transition: color 0.3s;
}

.nav-links li a:hover {
  color: #189AB4;
}

/* Hero Section */
.hero {
    background: url('back.jpg') no-repeat center center/cover;
    height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    text-align: center;
    color: white;
    filter: none;
  }
  

.hero-overlay {
  background: rgba(0, 0, 0, 0.6);
  padding: 2rem;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hero-overlay h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero-overlay p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.cta-button {
  background-color: #189AB4;
  color: white;
  padding: 0.8rem 1.5rem;
  border-radius: 5px;
  font-weight: 600;
  transition: background-color 0.3s;
}

.cta-button:hover {
  background-color: #05445E;
}

/* Intro Section */
.intro {
  padding: 4rem 2rem;
  background-color: #f8f9fa;
}

.intro-content {
  display: flex;
  max-width: 1200px;
  margin: auto;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.intro-text {
  flex: 1;
}

.intro-text h2 {
  font-size: 2rem;
  color: #05445E;
  margin-bottom: 1rem;
}

.intro-image {
  flex: 1;
}

.intro-image img {
  max-width: 100%;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* Footer */
footer {
  background-color: #05445E;
  color: white;
  text-align: center;
  padding: 1.5rem 0;
  margin-top: 3rem;
}
/* Highlights Section */
.highlights {
    background-color: #ffffff;
    padding: 4rem 2rem;
    text-align: center;
  }
  
  .highlights-content {
    max-width: 1200px;
    margin: auto;
    display: flex;
    gap: 2rem;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  
  .highlight {
    flex: 1;
    min-width: 250px;
    background-color: #f5f7fa;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
  }
  
  .highlight:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
  }
  
  .highlight img {
    width: 70px;
    height: 70px;
    object-fit: cover;
    margin-bottom: 1rem;
    border-radius: 50%;
  }
  
  .highlight h3 {
    color: #05445E;
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
  }
  
  .highlight p {
    font-size: 0.95rem;
    color: #333;
  }
/* General Styles */
body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background-color: #f8f9fb;
    color: #1a1a1a;
  }
  
  .container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
  }
  
  /* Header */
  .top-header {
    background-color: #12141d;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }
  
  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .logo {
    font-size: 1.5rem;
    font-weight: 800;
  }
  
  .nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
  }
  
  .nav-links li a {
    color: white;
    text-decoration: none;
    font-weight: 600;
  }
  
  .nav-links li a.active,
  .nav-links li a:hover {
    text-decoration: underline;
    color: #6bc1ff;
  }
  
  /* Page Title */
  .page-title {
    background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
    color: white;
    padding: 4rem 0;
    text-align: center;
  }
  
  .page-title h1 {
    margin: 0;
    font-size: 3rem;
  }
  
  .page-title p {
    font-size: 1.2rem;
    margin-top: 0.5rem;
  }
  
  /* Research Sections */
  .research-section {
    padding: 4rem 0;
  }
  
  .research-section.alt {
    background-color: #eef1f5;
  }
  
  .research-section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
  }
  
  .research-section p {
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 800px;
    margin-bottom: 2rem;
  }
  
  .research-section img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  }
  
  /* Footer */
  footer {
    background-color: #12141d;
    color: white;
    text-align: center;
    padding: 1rem 0;
    font-size: 0.9rem;
  }
  /* General Styles */
body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #e0e8f7, #f8f9fb);
    color: #1a1a1a;
    scroll-behavior: smooth;
  }
  
  .container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  
  /* Header */
  .top-header {
    background-color: #12141d;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 999;
    transition: background-color 0.3s ease;
  }
  
  .top-header.scrolled {
    background-color: #0d0e13;
    box-shadow: 0 6px 12px rgba(0,0,0,0.3);
  }
  
  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .logo {
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.05em;
    color: #6bc1ff;
    cursor: default;
    user-select: none;
    text-shadow: 0 0 8px #6bc1ff44;
  }
  
  .nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
  }
  
  .nav-links li a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    padding: 0.3rem 0.5rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
  }
  
  .nav-links li a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -3px;
    width: 0;
    height: 3px;
    background: #6bc1ff;
    transition: width 0.3s ease, left 0.3s ease;
    border-radius: 2px;
  }
  
  .nav-links li a:hover::after,
  .nav-links li a.active::after {
    width: 100%;
    left: 0;
  }
  
  .nav-links li a:hover,
  .nav-links li a.active {
    color: #6bc1ff;
    font-weight: 700;
  }
  
  /* Page Title */
  .page-title {
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    color: white;
    padding: 5rem 1rem 6rem;
    text-align: center;
    position: relative;
    overflow: hidden;
  }
  
  .page-title::before {
    content: "";
    position: absolute;
    top: 0;
    left: -25%;
    width: 150%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(107,193,255,0.3), transparent 70%);
    animation: pulseLight 6s ease-in-out infinite;
    z-index: 0;
  }
  
  @keyframes pulseLight {
    0%, 100% {
      transform: translateX(0);
      opacity: 0.6;
    }
    50% {
      transform: translateX(30%);
      opacity: 1;
    }
  }
  
  .page-title h1 {
    margin: 0;
    font-size: 3.8rem;
    font-weight: 900;
    position: relative;
    z-index: 1;
    letter-spacing: 0.05em;
    text-shadow: 0 0 8px #6bc1ffcc;
  }
  
  .page-title p {
    font-size: 1.3rem;
    margin-top: 1rem;
    position: relative;
    z-index: 1;
    font-weight: 500;
    color: #a8c6e8;
  }
  
  /* Research Sections */
  .research-section {
    padding: 4rem 0;
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 16px 32px rgba(107, 193, 255, 0.15);
    transition: box-shadow 0.3s ease;
  }
  
  .research-section:hover {
    box-shadow: 0 24px 48px rgba(107, 193, 255, 0.3);
  }
  
  .research-section.alt {
    background: linear-gradient(135deg, #eef1f5, #d7e3fc);
    box-shadow: 0 16px 32px rgba(44, 83, 100, 0.15);
  }
  
  .research-section h2 {
    font-size: 2.4rem;
    margin-bottom: 1rem;
    color: #203a43;
    letter-spacing: 0.02em;
  }
  
  .research-section p {
    font-size: 1.15rem;
    line-height: 1.75;
    max-width: 100%;
    margin-bottom: 2rem;
    color: #415a6b;
  }
  
  .research-section img {
    width: 100%;
    border-radius: 18px;
    box-shadow: 0 10px 20px rgba(32, 58, 67, 0.12);
    transition: transform 0.3s ease;
    cursor: pointer;
  }
  
  .research-section img:hover {
    transform: scale(1.03);
    box-shadow: 0 16px 32px rgba(32, 58, 67, 0.3);
  }
  
  /* Footer */
  footer {
    background-color: #12141d;
    color: white;
    text-align: center;
    padding: 1.2rem 1rem;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    user-select: none;
    border-top: 1px solid #20232a;
  }
  
  /* Utility */
  button, .btn {
    background: #6bc1ff;
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    color: white;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 6px 12px rgba(107, 193, 255, 0.6);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    font-family: 'Inter', sans-serif;
  }
  
  button:hover, .btn:hover {
    background-color: #4aa7e6;
    box-shadow: 0 8px 20px rgba(74, 167, 230, 0.8);
  }
  
  /* Responsive tweaks */
  @media (max-width: 600px) {
    .nav-links {
      gap: 1rem;
    }
  
    .page-title h1 {
      font-size: 2.6rem;
    }
  
    .research-section {
      padding: 2.5rem 1.5rem;
    }
  }

.tier-indicators {
    position: fixed;
    top: 150px; 
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 5rem; 
    z-index: 10;
  }
  
  /* The arrow style */
  .tier-indicators .arrow {
    width: 24px;
    height: 24px;
    border-left: 3px solid #6bc1ff;
    border-bottom: 3px solid #6bc1ff;
    transform: rotate(45deg);
    opacity: 0.5;
    transition: opacity 0.3s ease;
    cursor: default;
  }
  
  .tier-indicators .arrow:hover {
    opacity: 1;
    border-left-color: #4aa7e6;
    border-bottom-color: #4aa7e6;
  }
  .methodology {
    padding: 4rem 0;
    background-color: #f4f6f9;
    text-align: center;
  }
  
  .methodology h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
  }
  
  .methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  
  .method-card {
    background-color: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease;
    text-align: left;
  }
  
  .method-card:hover {
    transform: translateY(-5px);
  }
  
  .method-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #203a43;
  }
  
  .method-card p {
    font-size: 1rem;
    line-height: 1.6;
    color: #333;
  }
body {
  margin: 0;
  font-family: 'Outfit', sans-serif;
  background-color: #f8f9fb;
  color: #1a1a1a;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.top-header {
  background-color: #12141d;
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.nav-links li a {
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.nav-links li a.active,
.nav-links li a:hover {
  text-decoration: underline;
  color: #6bc1ff;
}

.page-title {
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.page-title h1 {
  margin: 0;
  font-size: 3rem;
}

.page-title p {
  font-size: 1.2rem;
  margin-top: 0.5rem;
}

.section {
  padding: 4rem 2rem;
  text-align: center;
}

.section.alt {
  background-color: #eef1f5;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.section p {
  font-size: 1.1rem;
  max-width: 800px;
  margin: 0 auto 2rem auto;
  line-height: 1.6;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background-color: #203a43;
  color: white;
  font-weight: 600;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.btn:hover {
  background-color: #2c5364;
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  padding: 2rem;
}

.model-card {
  background-color: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  padding: 2rem;
  text-align: left;
}

.code-output {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  padding: 2rem;
}

.code-box, .output-box {
  flex: 1 1 450px;
  background-color: #1e1e2f;
  color: #f8f8f2;
  padding: 1.5rem;
  border-radius: 10px;
  font-family: 'Courier New', Courier, monospace;
}

.code-box pre {
  overflow-x: auto;
  white-space: pre-wrap;
}

.output-box h4 {
  margin-bottom: 0.5rem;
}

footer {
  background-color: #12141d;
  color: white;
  text-align: center;
  padding: 1rem 0;
  font-size: 0.9rem;
  margin-top: 3rem;
}  
body {
    margin: 0;
    font-family: 'Outfit', sans-serif;
    background-color: #f8f9fb;
    color: #1a1a1a;
  }
  
  .container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
  }
  
  .top-header {
    background-color: #12141d;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }
  
  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
  }
  
  .logo {
    font-size: 1.5rem;
    font-weight: 800;
  }
  
  .nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
  }
  
  .nav-links li a {
    color: white;
    text-decoration: none;
    font-weight: 600;
  }
  
  .nav-links li a.active,
  .nav-links li a:hover {
    text-decoration: underline;
    color: #6bc1ff;
  }
  
  .page-title {
    background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
    color: white;
    padding: 4rem 0;
    text-align: center;
  }
  
  .page-title h1 {
    margin: 0;
    font-size: 3rem;
  }
  
  .page-title p {
    font-size: 1.2rem;
    margin-top: 0.5rem;
  }
  
  .section {
    padding: 4rem 2rem;
    text-align: center;
  }
  
  .section.alt {
    background-color: #eef1f5;
  }
  
  .section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
  }
  
  .section p {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto 2rem auto;
    line-height: 1.6;
  }
  
  .btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: #203a43;
    color: white;
    font-weight: 600;
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.3s ease;
  }
  
  .btn:hover {
    background-color: #2c5364;
  }
  
  .model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    padding: 2rem;
  }
  
  .model-card {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 2rem;
    text-align: left;
  }
  
  .code-output {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
  }
  
  .code-box, .output-box {
    flex: 1 1 450px;
    background-color: #1e1e2f;
    color: #f8f8f2;
    padding: 1.5rem;
    border-radius: 10px;
    font-family: 'Courier New', Courier, monospace;
  }
  
  .code-box pre {
    overflow-x: auto;
    white-space: pre-wrap;
  }
  
  .output-box h4 {
    margin-bottom: 0.5rem;
  }
  
  footer {
    background-color: #12141d;
    color: white;
    text-align: center;
    padding: 1rem 0;
    font-size: 0.9rem;
    margin-top: 3rem;
  }
  .theme-grid {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
  }
  
  .theme-connector {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.1); /* faint white line */
    z-index: 0;
  }
  
  /* Horizontal Line between cards in row */
  .connector-horizontal-1 {
    top: 90px;
    left: 320px;
    width: 80px;
    height: 2px;
  }
  
  .connector-horizontal-2 {
    top: 90px;
    left: 680px;
    width: 80px;
    height: 2px;
  }
  
  /* Vertical Line between rows */
  .connector-vertical {
    top: 270px;
    left: 160px;
    width: 2px;
    height: 80px;
  }