:root {
  --primary-blue: #1565c0;
  --dark-blue: #0d47a1;
  --light-gray: #f5f5f5;
  --medium-gray: #e0e0e0;
  --dark-gray: #424242;
  --accent-orange: #c7061a;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--light-gray);
  color: var(--dark-gray);
  line-height: 1.6;
}

header {
  background-color: white;
  padding: 30px 0 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  text-align: center;
  position: relative;
}

.logo {
  width: min(90%, 500px);
  height: auto;
  margin: 0 auto;
  display: block;
}

.college-hero {
  width: 100%;
  height: 50vh;
  max-height: 600px;
  object-fit: cover;
  filter: grayscale(100%) contrast(120%);
  margin: 0;
}

nav {
  background-color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1rem;
  position: relative;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  gap: 4px;
}

.hamburger-line {
  width: 25px;
  height: 3px;
  background-color: var(--dark-gray);
  transition: all 0.3s ease;
  transform-origin: center;
}

.nav-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

.nav-menu {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  flex: 1;
}

.nav-link {
  color: var(--dark-gray);
  text-decoration: none;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.nav-link:hover {
  color: var(--primary-blue);
  border-color: var(--primary-blue);
}

.nav-link.active {
  background-color: var(--primary-blue);
  color: white;
}

main {
  max-width: 1200px;
  margin: 3rem auto;
  padding: 0 2rem;
}

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

.intro-title {
  color: var(--accent-orange);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.intro-text {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.project-card {
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  padding: 2rem;
  border-left: 4px solid var(--accent-orange);
}

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

.project-title {
  color: var(--primary-blue);
  margin-top: 0;
  font-size: 1.3rem;
}

.project-icon {
  font-size: 2.5rem;
  color: var(--accent-orange);
  margin-bottom: 1rem;
}

footer {
  background-color: var(--dark-gray);
  color: white;
  padding: 3rem 2rem;
  text-align: center;
  margin-top: 3rem;
}

.footer-logo {
  width: 200px;
  margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-toggle {
    display: flex;
    align-self: flex-end;
  }

  .nav-menu {
    display: none;
    width: 100%;
    flex-direction: column;
    background-color: white;
    position: absolute;
    top: 100%;
    left: 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    margin-top: 0.5rem;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-link {
    padding: 1rem 2rem;
    border-radius: 0;
    border-bottom: 1px solid var(--medium-gray);
    text-align: center;
  }

  .nav-link:last-child {
    border-bottom: none;
  }

  .college-hero {
    height: 40vh;
  }

  .project-card {
    padding: 1.5rem;
  }
}