:root {
  --primary-color: #2C3E50;
  --accent-color: #3498DB;
  --light-accent: #E0F7FA;
  --text-color: #333;
  --light-text: #fff;
  --section-padding: 4rem 0;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
}

.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    margin-right: 15px;
    border-radius: 50%;
    background-color: var(--light-gray);
    color: #dc3545;
    transition: all 0.3s ease;
    text-decoration: none;
    font-size: 20px;
  }
  
  .social-icons a:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
  }
  .fixed-top2 {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1040;
}

.navbar {
  background-color: var(--primary-color);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.hero-section {
  /* background: linear-gradient(135deg, var(--primary-color), var(--accent-color)); */
  background: linear-gradient(to right, rgba(44, 62, 80, 0.9), rgba(52, 152, 219, 100)), url(img/runner-banner.png);
  color: var(--light-text);
  padding: 6rem 0;
  text-align: center;
}

.hero-section h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-section p {
  font-size: 1.2rem;
  opacity: 0.9;
}

.section {
  padding: var(--section-padding);
}

.section-alt {
  background-color: var(--light-accent);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-weight: 600;
  color: var(--primary-color);
  position: relative;
  padding-bottom: 1rem;
}

.section-title h2:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background-color: var(--accent-color);
}

.card {
  border: none;
  border-radius: 12px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.08);
  transition: transform 0.3s ease;
  margin-bottom: 2rem;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
}

.card-header {
  background-color: var(--primary-color);
  color: var(--light-text);
  font-weight: 600;
  text-align: center;
  padding: 1.5rem;
}

.icon-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1.5rem;
}

.icon-box img {
  width: 90px;
  height: 63px;
  margin-bottom: 1rem;
}

.chart {
  height: 300px;
  margin-bottom: 2rem;
}

.table-container {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.insight-box {
  background-color: #f8f9fa;
  border-left: 4px solid var(--accent-color);
  padding: 1.5rem;
  margin-bottom: 1rem;
  border-radius: 4px;
}

.prototype-container {
  text-align: center;
  margin: 3rem 0;
}

.prototype-video {
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
  max-width: 100%;
}

.prototype-button {
  margin-top: 2rem;
  padding: 1rem 2rem;
  font-weight: 600;
  border-radius: 50px;
  background-color: var(--accent-color);
  border: none;
  transition: all 0.3s ease;
}

.prototype-button:hover {
  background-color: var(--primary-color);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.image-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}
.img-bs{
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08); 
}

.gallery-item {
  flex: 0 0 calc(50% - 20px);
  max-width: calc(50% - 20px);
  border-radius: 12px;
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.03);
}

footer {
  background-color: var(--primary-color);
  color: var(--light-text);
  padding: 3rem 0;
  text-align: center;
}

@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2.5rem;
  }
  
  .gallery-item {
    flex: 0 0 100%;
    max-width: 100%;
  }
}