:root {
  --link-color: #7fffe1;
  --link-border: #7fffe13e;
}

.logo,
#navbar a.logo {
  opacity: 1;
  cursor: pointer;
  border-bottom: none;
  left: var(--space-sm);
  top: var(--space-sm);
  position: absolute;
  z-index: 1;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-weight: 700;
  font-size: calc(var(--size) * 0.13);
  letter-spacing: -0.01em;
  white-space: nowrap;
  color: #ffffff;
}
.logo:hover,
#navbar a.logo:hover {
  opacity: 1;
}
.logo span {
  background: linear-gradient(90deg, #2ea3f2 0%, #9fb2c4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.about {
  margin-top: 20px;
  position: fixed;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 2rem;
  right: 20px;
  bottom: 10px;
  z-index: 1;
}
.scroll-to-top-btn {
  position: fixed;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  color: var(--text-primary);
  right: 20px;
  bottom: 10px;
  z-index: 1;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--surface-primary);
}
header {
  position: relative;
}

details {
  margin-bottom: var(--space-xs);
  transition: all 0.9s ease;
}
details ul {
  list-style-position: inside;
  padding-left: 1rem;
  list-style: none;
}
summary {
  padding: var(--space-xs) var(--space-sm);
  font-size: 1.2rem;
  margin: 0 var(--space-sm);
  cursor: pointer;
  border-radius: var(--radius-sm);
  background: var(--navBtn-bg);
  transition: background 0.4s ease;
}
summary:hover {
  background: var(--hover-bg);
}

#Introduction {
  background: var(--surface-primary);
  padding: var(--space-sm);
  margin: var(--space-md);
  border-radius: var(--radius-sm);
}

.main-section {
  margin: 0 auto;
}
.main-section > section {
  background: var(--main-content-bg);
  padding: var(--space-sm);
  margin: var(--space-md);
  border-radius: var(--radius-sm);
}

.example-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: var(--space-xs);
}

h2 {
  text-align: center;
  margin: var(--space-md) auto;
}
h3 {
  border-bottom: 1px solid;
  padding-left: 5px;
}
h4::before {
  content: "→";
  font-weight: 900;
  margin: var(--space-md);
}

nav#navbar {
  position: fixed;
  border-right: 3px solid var(--border-primary);
  margin-right: var(--space-sm);
  top: 0;
  left: 0;
  height: 100dvh;
  width: 260px;
  padding-top: calc(var(--space-xl) + var(--space-sm));
  background: var(--card-bg);
  transition: all 0.2s ease;
  overflow-y: auto;
}
#navbar h2 {
  font-size: var(--text-md);
  border-bottom: 2px solid var(--border-color);
  padding: 15px 0 0 0;
}
#navbar a {
  display: block;
  text-decoration: none;
  font-size: 1.2rem;
  color: #9f9f9f;
  padding: 0 var(--space-sm);
  border-bottom: 2px solid var(--link-border);
}
#navbar a:hover {
  opacity: 0.5;
}
#navbar a:focus-within {
  color: var(--link);
}
#navbar a.nav-link.activeLink {
  color: var(--link);
}

#main-doc {
  margin-left: 250px;
  padding: var(--space-md) 5px;
  transition: all 0.5s ease;
}

#main-doc pre {
        background: #0d0d0d;
        border: 1px solid #262626;
        border-radius: 10px;
        padding: 1.1em 1.3em;
        margin: 1em 0;
        overflow-x: auto;
      }

      #main-doc pre::-webkit-scrollbar {
        height: 8px;
      }

      #main-doc pre::-webkit-scrollbar-thumb {
        background: #333;
        border-radius: 4px;
      }

      #main-doc pre code {
        display: block;
        background: none;
        border: none;
        padding: 0;
        margin: 0;
        color: #e6e6e6;
        font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
        font-size: 0.88rem;
        line-height: 1.6;
        white-space: pre;
        tab-size: 2;
      }

      #main-doc code:not(pre code) {
        background: #1a1a1a;
        border: 1px solid #2a2a2a;
        border-radius: 4px;
        padding: 0.15em 0.4em;
        font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
        font-size: 0.88em;
        color: #ffb86b;
      }

      .starter-html-block {
        max-height: 480px;
        overflow-y: auto;
      }

.attribute {
  color: rgba(4, 255, 4, 0.557);
}

.menuIcon {
  display: none;
  flex-direction: column;
  justify-content: center;
  cursor: pointer;
  top: var(--space-sm);
  left: var(--space-md);
  position: fixed;
  gap: 3px;
  z-index: 9990;
  background-color: var(--surface-primary);
  width: 35px;
  height: 35px;
  border-radius: var(--radius-sm);
  animation: slide 0.9s ease;
}
.menuIcon span {
  width: 24px;
  height: 4px;
  background: #ffffff;
  border-radius: var(--radius-sm);
  margin: 0 auto;
}
.menuIcon:hover {
  opacity: 0.7;
}

@keyframes slide {
  from {
    transform: translateX(-60px);
  }
}

@media (max-width: 800px) {
  nav#navbar.hide {
    left: -100%;
  }
  .menuIcon {
    display: flex;
  }
  nav#navbar {
    position: fixed;
    width: 90%;
    max-width: 260px;
    height: 100dvh;
    padding-top: calc(var(--space-xl) * 1.5);
    padding-bottom: var(--space-xl);
    z-index: 2;
  }
  #main-doc {
    margin: auto 4px;
    padding: 0;
  }
  #main-doc.adjust {
    margin-left: 2px;
  }
  .logo,
  #navbar a.logo {
    right: var(--space-sm);
    left: auto;
  }
}

footer {
  text-align: center;
  opacity: 0.2;
  background-color: #111;
  padding: 10px 0;
  margin-top: auto;
}

/*
hide section and show on link click
#hidden article section {
  display: none;
}
#hidden section.shown,
article.show {
  display: block;
}
  */