body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  line-height: 1.6;
  background-color: #ffffff;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}


.main-header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #6c5ce7;
    text-decoration: none;
}

.main-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
}

.main-nav ul li {
    margin-left: 25px;
}

.main-nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.main-nav ul li a:hover, .main-nav ul li a.active {
    color: #6c5ce7;
}



.hero {
  background: linear-gradient(135deg, #6c5ce7, #a29bfe);
  color: white;
  padding: 100px 0;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 10px;
}

.hero .subtitle {
    font-size: 24px;
    font-weight: 300;
    margin-bottom: 20px;
    opacity: 0.9;
}

.hero p {
  font-size: 20px;
  margin-bottom: 30px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-block;
  background: #fff;
  color: #6c5ce7;
  padding: 12px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
  font-size: 16px;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: #6c5ce7;
    padding: 10px 25px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
    border: 2px solid #6c5ce7;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: #6c5ce7;
    color: #fff;
}



section {
    padding: 80px 0;
}

h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 20px;
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px auto;
    font-size: 18px;
    color: #555;
}


.features {
  background: #f9f9f9;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.feature-card {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-10px);
}

.feature-card h3 {
  margin-top: 0;
  font-size: 24px;
  color: #6c5ce7;
}


.about-preview {
    text-align: center;
}
.about-preview .profile-pic {
    border-radius: 50%;
    width: 150px;
    height: 150px;
    object-fit: cover;
    margin-bottom: 20px;
    border: 5px solid #a29bfe;
}
.about-preview p {
    max-width: 700px;
    margin: 0 auto 30px auto;
}


.testimonials {
    background-color: #f9f9f9;
}
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.testimonial-card {
    background: #fff;
    padding: 30px;
    border-left: 5px solid #6c5ce7;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}
.testimonial-card footer {
    background: none;
    color: #555;
    text-align: right;
    padding: 10px 0 0 0;
    font-style: italic;
    font-weight: bold;
}


.page-header {
    background: #f4f5f7;
    padding: 50px 0;
    text-align: center;
}
.page-header h1 {
    font-size: 42px;
    margin-bottom: 10px;
    color: #2d3436;
}
.page-header p {
    font-size: 18px;
    color: #555;
    max-width: 600px;
    margin: 0 auto;
}


.content-section {
    padding-top: 40px;
    padding-bottom: 40px;
}
.content-section h2 {
    text-align: left;
}


.product-item {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    align-items: flex-start;
}
.product-item img {
    max-width: 200px;
    flex-shrink: 0;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}


.contact {
    padding-top: 40px;
}
.contact .container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    align-items: center;
}
.contact-info a {
    color: #6c5ce7;
}

.contact-form {
  max-width: 600px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 16px;
  box-sizing: border-box;
}

.form-group textarea {
  min-height: 150px;
}

.submit-btn {
  background: #6c5ce7;
  color: white;
  border: none;
  padding: 12px 30px;
  border-radius: 30px;
  cursor: pointer;
  font-size: 16px;
  font-weight: bold;
  transition: all 0.3s ease;
}

.submit-btn:hover {
  background: #5649c0;
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}


.test-section { background: #f9f9f9; padding-bottom: 40px; }
.form-part h3 {
    font-size: 28px;
    color: #6c5ce7;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
    margin-bottom: 30px;
}
.question-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}
.test-section .form-group label {
    font-weight: normal;
    font-size: 15px;
}
.test-section .form-group input[type="number"] {
    max-width: 80px;
    padding: 8px;
    text-align: center;
}
.form-actions { text-align: center; margin: 40px 0; }
.results-section {
    background: white;
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    margin-top: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}
.results-section.hidden { display: none; }
.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.result-item h3 { font-size: 22px; color: #555; }
.result-item p { font-size: 48px; font-weight: bold; color: #6c5ce7; margin: 0;}
.info-section { padding-top: 40px; }
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}
.info-card {
    background: #f9f9f9;
    padding: 25px;
    border-radius: 10px;
}
.info-card img {
    width: 100%;
    border-radius: 5px;
    margin-bottom: 15px;
}
.info-card h3 { color: #6c5ce7; }
.optimization-section, .scientific-section {
    margin-top: 60px;
    padding: 30px;
    background: #f9f9f9;
    border-radius: 10px;
}



footer {
  background: #2d3436;
  color: white;
  text-align: center;
  padding: 30px 0;
}
footer a {
    color: #a29bfe;
    text-decoration: none;
}
footer a:hover {
    text-decoration: underline;
}


@media (max-width: 992px) {
    .main-nav { display: none;  }
    .contact .container { grid-template-columns: 1fr; }
    .grid-two { grid-template-columns: 1fr; }
    .cta-content { flex-direction: column; align-items: flex-start; }
    .image-row { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 18px; }
  h2 { font-size: 30px; }
  .question-grid { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr; }
  .product-item { flex-direction: column; align-items: center; text-align: center; }
}
```

***