:root {
  --fa-yellow: #fcd34d;
  --fa-dk-yellow: #fbbf24;
  --fa-dk-blue: #1e3a8a;
  --fa-blue: #3b82f6;
}

body {
  margin: 0;
  font-family: sans-serif;
  transition: background-color 0.3s, color 0.3s;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #222;
  padding: 10px 20px;
  color: white;
  position: relative;
  z-index: 10;
}

.logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  margin-right: 10px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-left a {
  display: flex;
  align-items: center;
  color: white;
  text-decoration: none;
  font-weight: bold;
}

.menu-toggle {
  font-size: 24px;
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  margin-left: 10px;
}

nav.menu {
  display: none;
  flex-direction: column;
  background-color: #333;
  position: absolute;
  top: 60px;
  right: 10px;
  width: 200px;
  border: 1px solid #555;
  z-index: 9;
}

nav.menu a {
  padding: 12px 20px;
  color: white;
  text-decoration: none;
  border-bottom: 1px solid #444;
}

nav.menu a:hover {
  background-color: #444;
}

nav.menu.show {
  display: flex;
}

.theme-toggle-button {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  margin-left: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#scrollToTopBtn {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 50px;
  height: 50px;
  background-color: purple;
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  z-index: 1000;
}

#scrollToTopBtn:hover {
  background-color: #5a00a0;
}

a {
  color: #56c8ff;
}

svg {
  width: 20px;
  height: 20px;
  fill: white;
}