:root {
  --primary-color: #1abc9c;
  --secondary-color: #16a085;
  --text-color: #333;
  --background-color: #f9f9f9;
  --white: #ffffff;
}

body {
  font-family: "Montserrat", sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
}

.header {
  background: rgba(0, 0, 0, 0.8);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

.nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav__logo img {
  height: 50px;
  -webkit-filter: invert(1) brightness(5);
          filter: invert(1) brightness(5);
}

.blog-post {
  margin-top: 100px;
  position: relative;
  z-index: 1;
}

.article__hero {
  position: relative;
  height: 60vh;
  overflow: hidden;
}

.article__hero img {
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
}

.article__hero h1 {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  background: -webkit-gradient(linear, left top, left bottom, from(transparent), to(rgba(0, 0, 0, 0.8)));
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: var(--white);
  margin: 0;
  font-size: 2.5rem;
}

.article__content {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  background: var(--background-color);
  position: relative;
  z-index: 2;
}

.lead {
  font-size: 1.2rem;
  color: #666;
  border-left: 4px solid var(--primary-color);
  padding-left: 1rem;
  margin: 2rem 0;
}

.article__section {
  margin: 3rem 0;
}

.symptoms-grid {
  display: -ms-grid;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.symptom-card {
  background: var(--white);
  padding: 1.5rem;
  border-radius: 10px;
  -webkit-box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
          box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.article__cta {
  background: var(--primary-color);
  color: var(--white);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  margin: 3rem 0;
}

.cta-button {
  display: inline-block;
  background: var(--white);
  color: var(--primary-color);
  padding: 1rem 2rem;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 600;
  margin-top: 1rem;
  -webkit-transition: -webkit-transform 0.3s ease;
  transition: -webkit-transform 0.3s ease;
  transition: transform 0.3s ease;
  transition: transform 0.3s ease, -webkit-transform 0.3s ease;
}

.cta-button:hover {
  -webkit-transform: translateY(-2px);
          transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 768px) {
  .article__hero h1 {
    font-size: 2rem;
    padding: 1.5rem;
  }
  .article__content {
    padding: 1.5rem;
  }
  .symptoms-grid {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
  }
}
@media (max-width: 480px) {
  .article__hero {
    height: 40vh;
  }
  .article__hero h1 {
    font-size: 1.5rem;
    padding: 1rem;
  }
  .lead {
    font-size: 1rem;
  }
}
.treatment-options {
  display: -ms-grid;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.treatment-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 10px;
  -webkit-box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
          box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.treatment-card h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.treatment-card ul {
  list-style: none;
  padding: 0;
}

.treatment-card li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #eee;
}

.treatment-card li:last-child {
  border-bottom: none;
}

@media (max-width: 768px) {
  .treatment-options {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
  }
}