:root {
  --bg: #0f0f14;
  --bg-panel: #13131a;
  --bg-elevated: #1a1b26;
  --bg-hover: #24283b;
  --border: #2a2e3f;
  --border-subtle: #1f2335;
  --text: #c0caf5;
  --text-dim: #565f89;
  --accent-cyan: #7dcfff;
  --accent-green: #9ece6a;
  --accent-yellow: #e0af68;
  --accent-red: #f7768e;
  --accent-blue: #7aa2f7;
  --accent-purple: #bb9af7;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, Monaco, monospace;
  --font-body: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
}

#banner {
  background: linear-gradient(90deg, var(--bg-panel), #0c0c12);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  color: #4e567c;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

#banner .badge {
  background: rgba(125,207,255,0.12);
  /* border: 1px solid rgba(125,207,255,0.35); */
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-weight: 600;
}

#app {
  display: flex;
  height: calc(100% - 44px);
}

#sidebar {
  width: 280px;
  background: var(--bg-panel);
  /* border-right: 1px solid var(--border); */
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

#search-wrap {
  padding: 0.75rem;
  /* border-bottom: 1px solid var(--border); */
}

#search {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  outline: transparent solid 2px;
}

#search::placeholder { color: var(--text-dim); }

#search:focus-visible {
  border-color: var(--accent-cyan);
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

#search-results {
  max-height: 200px;
  overflow: auto;
  margin-top: 0.5rem;
}

.search-result {
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
}

.search-result:hover {
  background: var(--bg-hover);
}

.search-result .file {
  color: var(--accent-yellow);
  font-weight: 600;
}

.search-result .snippet {
  color: var(--text-dim);
}

#nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 0;
}

.nav-group {
  margin-bottom: 0.5rem;
}

.nav-group-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  cursor: pointer;
  user-select: none;
}

.nav-group-title .chevron {
  display: inline-block;
  transition: transform 0.15s ease;
  color: var(--text-dim);
}

.nav-group.collapsed .chevron {
  transform: rotate(-90deg);
}

.nav-group.collapsed .nav-items {
  display: none;
}

.nav-items {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-items li a {
  display: block;
  padding: 0.35rem 1rem 0.35rem 1.5rem;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  border-left: 3px solid transparent;
}

.nav-items li a:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.nav-items li a:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: -2px;
  background: var(--bg-hover);
  color: var(--text);
}

.nav-items li a.active {
  color: var(--accent-cyan);
  background: rgba(125,207,255,0.08);
  border-left-color: var(--accent-cyan);
}

#main {
  flex: 1;
  overflow-y: auto;
  padding: 2rem 2.5rem;
  min-width: 0;
}

/* Centered content wrapper for markdown docs */
#main .content {
  max-width: 768px;
  margin: 0 auto;
}

#main h1 {
  font-size: 1.8rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
  color: var(--accent-cyan);
}

#main h2 {
  font-size: 1.35rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--accent-green);
}

#main h3 {
  font-size: 1.1rem;
  margin: 1.25rem 0 0.5rem;
  color: var(--accent-yellow);
}

#main p { margin: 0.6rem 0; }

#main a { color: var(--accent-cyan); }

#main code {
  font-family: var(--font-mono);
  background: rgba(65,72,104,0.35);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-size: 0.9em;
}

#main pre {
  background: #0c0c12;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
}

#main pre code {
  background: transparent;
  padding: 0;
  font-size: 0.85rem;
}

#main table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.92rem;
}

#main th,
#main td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

#main th {
  background: var(--bg-panel);
  color: var(--accent-cyan);
  font-weight: 600;
}

#main tr:nth-child(even) {
  background: rgba(65,72,104,0.15);
}

#main ul, #main ol {
  margin: 0.6rem 0;
  padding-left: 1.5rem;
}

#main li { margin: 0.25rem 0; }

#main blockquote {
  border-left: 4px solid var(--accent-yellow);
  background: rgba(224,175,104,0.08);
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-radius: 0 6px 6px 0;
}

#main blockquote p { margin: 0; }

#main hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

/* Doc navigation */
.doc-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.doc-nav-btn {
  display: flex;
  flex-direction: column;
  flex: 1;
  max-width: 320px;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  text-decoration: none;
  color: var(--text) !important;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.doc-nav-btn:hover {
  border-color: var(--accent-cyan);
  background: var(--bg-hover);
}

.doc-nav-btn:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.doc-nav-next {
  align-items: flex-end;
  text-align: right;
  margin-left: auto;
}

.doc-nav-prev {
  align-items: flex-start;
  text-align: left;
}

.doc-nav-disabled {
  opacity: 0.35;
  pointer-events: none;
  cursor: default;
}

.doc-nav-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

.doc-nav-title {
  font-weight: 600;
  font-size: 0.95rem;
}

/* Landing page */
.landing {
  max-width: 900px;
  margin: 0 auto;
}

#main .hero {
  text-align: center;
  padding: 3.5rem 1rem 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#main .hero .hero-title {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--accent-cyan);
  letter-spacing: -0.03em;
  margin: 0 0 0.25rem;
}

#main .hero .logo-img {
  display: block;
  width: 320px;
  height: auto;
  margin: 0 0 4rem;
}

#main .hero .tagline {
  color: var(--text-dim);
  font-size: 1.2rem;
  max-width: 720px;
  margin: 0 0 2rem;
  text-align: center;
  line-height: 1.7;
}

#main .install-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 1.5rem;
}

#main .install-box code {
  background: transparent;
  padding: 0;
  font-size: inherit;
}

#main .install-box .copy-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-dim);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
}

#main .install-box .copy-btn:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

#main .install-box .copy-btn:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

#main .hero .cta {
  display: inline-flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

#main .hero .cta a {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

#main .hero .cta .btn-primary {
  background: var(--accent-cyan);
  color: #050508 !important;
}

#main .hero .cta .btn-primary:hover {
  background: #a5d8ff;
}

#main .hero .cta .btn-secondary {
  background: var(--bg-elevated);
  color: var(--text) !important;
  border: 1px solid var(--border-subtle);
}

#main .hero .cta .btn-secondary:hover {
  border-color: var(--accent-cyan);
}

#main .hero .cta a:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: 8px;
}

.landing-card:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: 10px;
}

.section-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin: 2.5rem 0 1rem;
  text-align: center;
}

.landing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

#main .landing-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 1.25rem;
  text-decoration: none;
  color: inherit !important;
  transition: transform 0.1s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

#main .landing-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-cyan);
  box-shadow: 0 4px 20px rgba(125,207,255,0.08);
}

#main .landing-card .card-icon {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

#main .landing-card h3 {
  margin: 0 0 0.35rem;
  color: var(--accent-green);
  font-size: 1rem;
}

#main .landing-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

#main .features-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin: 2rem 0 1rem;
  padding: 0;
  list-style: none;
}

#main .features-strip li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-dim);
  font-size: 0.9rem;
}

#main .features-strip li .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  display: inline-block;
}

/* Sidebar toggle */
#sidebar-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
  margin-right: 0.5rem;
  line-height: 1;
}

#sidebar-toggle:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

#sidebar-toggle:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

#sidebar-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
}

#sidebar-close {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-dim);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
  line-height: 1;
}

#sidebar-close:hover {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

#sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 40;
  backdrop-filter: blur(2px);
}

/* Large screens */
@media (min-width: 1600px) {
  #main { padding: 2.5rem 4rem; }
  #main .content { max-width: 860px; }
  .landing { max-width: 1100px; }
  #sidebar { width: 300px; }
}

@media (min-width: 1920px) {
  #main { padding: 3rem 5rem; }
  #main .content { max-width: 920px; }
  .landing { max-width: 1200px; }
}

/* Tablet / medium */
@media (max-width: 960px) {
  #sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(80%, 300px);
    z-index: 50;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    /* border-right: 1px solid var(--border); */
    box-shadow: 4px 0 24px rgba(0,0,0,0.4);
  }
  body.sidebar-open #sidebar {
    transform: translateX(0);
  }
  body.sidebar-open #sidebar-overlay {
    display: block;
  }
  #sidebar-header {
    display: flex;
    padding: 0.5rem 0.75rem;
    min-height: 44px;
  }
  #sidebar-toggle {
    display: inline-block;
  }
  #search-wrap {
    padding: 0.5rem 0.75rem;
  }
  .nav-group-title {
    padding: 0.35rem 0.75rem;
    font-size: 0.7rem;
  }
  .nav-items li a {
    padding: 0.3rem 0.75rem 0.3rem 1.25rem;
    font-size: 0.85rem;
  }
  #main {
    padding: 1.5rem;
    width: 100%;
  }
  #main .hero .hero-title { font-size: 2.8rem; }
  #main .hero .logo-img { width: 300px; }
  #main .hero .tagline { font-size: 1.1rem; max-width: 600px; }
}

/* Small mobile */
@media (max-width: 640px) {
  #banner {
    font-size: 0.75rem;
    padding: 0.5rem 0.75rem;
  }
  #banner .badge {
    padding: 0.1rem 0.4rem;
    font-size: 0.75rem;
  }
  #sidebar { width: min(85%, 280px); }
  #sidebar-header { padding: 0.4rem 0.75rem; }
  #search-wrap { padding: 0.4rem 0.75rem; }
  .nav-group-title { padding: 0.3rem 0.75rem; }
  .nav-items li a { padding: 0.25rem 0.75rem 0.25rem 1.1rem; font-size: 0.82rem; }
  #main { padding: 1rem; }
  #main .hero { padding: 2rem 0.5rem; }
  #main .hero .hero-title { font-size: 2.2rem; }
  #main .hero .logo-img { width: 240px; }
  #main .hero .tagline { font-size: 1rem; max-width: 100%; }
  #main .hero .cta a {
    padding: 0.55rem 1.1rem;
    font-size: 0.9rem;
  }
  .landing-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  #main .landing-card { padding: 1rem; }
  #main h1 { font-size: 1.5rem; }
  #main h2 { font-size: 1.2rem; }
  #main pre { padding: 0.75rem; }
  .doc-nav {
    flex-direction: column;
    gap: 0.75rem;
  }
  .doc-nav-btn {
    max-width: 100%;
    padding: 0.6rem 0.9rem;
  }
  .doc-nav-next {
    align-items: flex-start;
    text-align: left;
    margin-left: 0;
  }
}

/* Very small mobile */
@media (max-width: 480px) {
  #banner span:last-child {
    display: none;
  }
}

@media (max-width: 380px) {
  #sidebar { width: 88%; }
  #main .hero .hero-title { font-size: 1.8rem; }
  #main .hero .logo-img { width: 180px; }
  #main .install-box {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    gap: 0.5rem;
  }
  #main .features-strip {
    gap: 0.75rem;
  }
  #main .features-strip li {
    font-size: 0.8rem;
  }
}