:root {
  --primary: #0055b9;
  --secondary: #003d82;
  --light: #f8f9fa;
  --dark: #212529;
  --gray: #6c757d;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #f5f7fa;
  color: #333;
  line-height: 1.6;
}

/* Compact Header */
header {
  background-color: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 8px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1050px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}

.logo {
  width: 140px;
  display: flex;
}

.logo span {
  color: var(--dark);
}

.logo-icon {
  margin-right: 8px;
  font-size: 24px;
}

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 15px;
}

nav ul li a {
  text-decoration: none;
  color: var(--dark);
  font-weight: 500;
  font-size: 14px;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: var(--primary);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--dark);
}

     
/* Footer */
footer {
  background-color: black;
  color: white;
  padding: 50px 20px 20px;
}

.footer-container {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
}

.footer-column h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: #ddd;
}

.footer-column ul {
  list-style: none;
  padding-left: 0;
}

.footer-column ul li {
  margin-bottom: 10px;
}

.footer-column ul li a {
  color: #aaa;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-column ul li a:hover {
  color: white;
}

.copyright {
  text-align: center;
  margin-top: 50px;
  padding-top: 20px;
  border-top: 1px solid #333;
  color: #777;
  font-size: 0.9rem;
}


#mainNav ul {
  margin-bottom: 0;
}


@media (max-width: 768px) {
  .menu-toggle {
      display: block;
  }
  
  nav {
      position: absolute;
      top: 100%;
      left: 0;
      width: 100%;
      background-color: white;
      box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
      padding: 10px 0;
      display: none;
  }
  
  nav.active {
      display: block;
  }
  
  nav ul {
      flex-direction: column;
      align-items: center;
  }
  
  nav ul li {
      margin: 5px 0;
  }
  
  .hero h1 {
      font-size: 1.8rem;
  }
  
  .converter-box {
      padding: 20px;
  }
  
  .upload-area {
      padding: 20px 10px;
  }
  
  .about-content {
      padding: 30px;
  }
}

@media (max-width: 480px) {
  .header-container {
      padding: 0 15px;
  }
  
  .logo {
      font-size: 18px;
  }
}