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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f0f2f5;
}

.container {
  max-width: 1366px;
  margin: 0 auto;
  padding: 0;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: #fff;
}

.logo {
    font-size: 1.2rem;
    font-weight: bold;
    color: #333;
}

nav a {
    margin-left: 1rem;
    text-decoration: none;
    color: #333;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-primary {
    background: linear-gradient(to right, #e860ff, #5076ff);
    color: #fff;
}

.btn-secondary {
    background-color: #333;
    color: #fff;
}

main {
    padding: 2rem 5%;
}

.hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.hero-content {
    flex: 1;
    padding-left: 3rem;
    padding-top: 3rem;
    padding-bottom: 3rem;
}

h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 600;
}

.hero p {
    color: #666;
    margin-bottom: 1.5rem;
    max-width: 500px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.circle-icon {
    width: 350px;
    height: 350px;
    background-image: radial-gradient(circle at 50% 50%, rgba(0, 188, 212, 0.01) 50%, rgba(240, 242, 245, 1) 70%), url("th-4.jpeg");
    background-position: 50% calc(50%);
    background-size: contain;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.research-options {
    margin-bottom: 3rem;
    text-align: center;
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin: 2rem;
}
.checkbox-group div {
    margin: 2rem;
}

.checkbox-group label {
    background-color: #fff;
    padding: 1rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.features {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    min-width: 300px;
}

.feature-card img {
    width: 300px;
    height: 300px;
}
.feature-card {
    flex: 1 1 300px;
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    max-width: 320px;
}

.icon {
    width: 100%;
    max-width: 20rem;
    height: 20rem;
    margin-bottom: 1rem;
    justify-content: center;
}

.describe-project, .define-entities, .get-results {
    background: url('path-to-icon.svg') no-repeat center;
    background-size: contain;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    color: #333;
}

.feature-card p {
    color: #666;
    font-size: 0.9rem;
}

.cta-bottom {
    text-align: center;
    margin-bottom: 5rem;
    margin-top: 5rem;
}

.btn-large {
    padding: 0.75rem 1.5rem;
    margin: 2rem;
    font-size: 1.1rem;
}

footer {
    background-color: #f0f0f0;
    padding: 1rem 5%;
    text-align: center;
}

footer a {
    margin: 0 0.5rem;
    color: #666;
    text-decoration: none;
}

.checkbox-group input[type="checkbox"] {
    visibility: hidden;
    display: none;
}

.checkbox-group *,
.checkbox-group ::after,
.checkbox-group ::before {
    box-sizing: border-box;
}

.checkbox-group {
    position: relative;
    display: flex;
    margin: 2rem;
}
.checkbox-group .check {
    width: 50px;
    height: 50px;
    position: absolute;
    opacity: 0;
}
.checkbox-group .label svg {
    vertical-align: middle;
}
.checkbox-group .path1 {
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
    transition: .5s all;
}
.checkbox-group .check:checked + label svg g path {
    stroke-dashoffset: 0;
}

.box {
    background-color: black;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.box a {
    padding: 15px;
    background-color: #fff;
    border-radius: 3px;
    text-decoration: none;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(126, 126, 126, 0.2);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.content {
    position: relative;
    background: white;
    padding: 1em 2em;
    border-radius: 4px;
}

.modal:target {
    display: flex;
}

svg {
    display: unset !important;
}

@media (max-width: 768px) {
    header {
      flex-direction: column;
      padding: 1rem;
    }
  
    nav a {
      margin-left: 1rem;
      margin-right: 1rem;
    }
  
    .hero {
      flex-direction: column;
    }
  
    .hero-content {
      padding-right: 0;
      padding-left: 0;
      text-align: center;
    }
  
    h1 {
      font-size: 2.5rem;
    }
  
    .circle-icon {
      max-width: 250px;
      height: 250px;
    }
  
    .features {
      gap: 2rem;
    }
  
    .feature-card {
      flex: 1 1 300px;
      max-width: 320px;
    }
  }

  .step {
    margin-bottom: 30px;
  }

  #key-features ul li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
  }
  
  #key-features ul li:before {
    content: "•";
    color: #3498db;
    font-size: 1.5em;
    position: absolute;
    left: 0;
    top: -5px;
  }

  #cta {
    background-color: #3498db;
    color: white;
    text-align: center;
    padding: 40px 0;
  }
  
  #cta h2 {
    color: white;
    font-size: 2rem;
  }

#introduction {
    background-color: #ecf0f1;
    padding: 40px 0;
  }
  
  #introduction h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
  }
  
  .step {
    margin-bottom: 30px;
  }
  
  .step h3 {
    color: #3498db;
  }
  
  #key-features ul {
    list-style-type: none;
    padding-left: 0;
  }

  .benefit-card {
    display: flex;
    background-color: #ffffff;
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }
  
  .benefit-image {
    flex: 0 0 40%;
    background-size: cover;
    background-position: center;
    min-height: 250px;
    max-width: 250px;
  }
  
  .benefit-content {
    flex: 1;
    padding: 20px;
  }
  
  .benefit-content h3 {
    margin-top: 0;
    color: #333;
    font-weight: 500;
    font-size: 1.2rem;
  }

  .benefit-content h1 {
    margin-top: 0;
    color: #333;
    font-weight: 500;
    font-size: 1.2rem;
    font-family: Georgia,Times,'Times New Roman',serif;
    font-style: italic;
  }
  
  .benefit-content p {
    font-family: Inter,sans-serif;
    font-size: 16px;
    line-height: 26px;
    font-weight: 300;
    letter-spacing: -0.02rem;
  }
  .how-it-works {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
  }
  
  .how-it-works h2 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 40px;
  }
  
  .steps {
    display: flex;
    justify-content: space-between;
  }
  
  .step {
    flex: 1;
    text-align: center;
    padding: 0 15px;
    font-size: 0.8rem;
  }
  
  .step-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
  }
  
  .step:nth-child(1) .step-circle {
    border: 3px solid #6b5bde;
  }
  
  .step:nth-child(2) .step-circle {
    border: 3px solid #ffa500;
  }
  
  .step:nth-child(3) .step-circle {
    border: 3px solid #20b2aa;
  }
  
  .step-icon {
    font-size: 2em;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  
  .step h3 {
    font-size: 1.2em;
    margin-bottom: 10px;
  }
  
  .step p {
    font-size: 0.9em;
    color: #666;
  }
  
  .pricing-container {
    max-width: 1360px;
    margin: 0 auto;
    padding: 40px 20px;
  }
  
  .pricing-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    grid-gap: 30px;
  }
  
  .pricing-plan {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 30px;
    text-align: center;
  }
  
  .pricing-plan h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
  }
  
  .pricing-plan .price {
    font-size: 1rem;
    font-weight: bold;
    margin-bottom: 20px;
  }
  
  .pricing-plan .description {
    color: #666;
    margin-bottom: 20px;
  }
  
  .pricing-plan .pricing-features {
    padding-top: 20px;
    margin: 15px;
    text-align: left;
  }
  
  .pricing-plan .pricing-features li {
    margin-bottom: 10px;
  }
  
  .pricing-plan.featured {
    position: relative;
    z-index: 1;
    transform: scale(1.05);
  }
  
  @media (max-width: 768px) {
    .pricing-container {
      padding: 20px;
    }
  
    .pricing-options {
      grid-template-columns: 1fr;
    }
  }

  .fas.fa-check {
    margin-right: 0.5rem;
  }
  
  .pricing-plan.featured {
    position: relative;
  }
  
  .most-popular {
    position: absolute;
    top: 10px;
    left: -20px;
    background-color: #ff9800;
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    transform: rotate(-45deg);
    font-size: 0.8rem;
    font-weight: bold;
  }

  .toggle-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 50px;
  }
  
  .toggle-container span {
    margin: 0 10px;
  }
  
  .switch {
    position: relative;
    display: inline-block;
    width: 80px;
    height: 34px;
  }
  
  .switch input {
    opacity: 0;
    width: 0;
    height: 0;
  }
  
  .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .4s;
    transition: .4s;
  }
  
  .slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
  }
  
  input:checked + .slider {
    background-color: #2196F3;
  }
  
  input:focus + .slider {
    box-shadow: 0 0 1px #2196F3;
  }
  
  input:checked + .slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
  }
  
  /* Rounded sliders */
  .slider.round {
    border-radius: 34px;
  }
  
  .slider.round:before {
    border-radius: 50%;
  }