:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --text: #0b1220;
  --muted: #475569;
  --link: #0b5fff;
  --border: rgba(15, 23, 42, 0.12);
  --shadow: 0 10px 25px rgba(2, 6, 23, 0.08);

  --accent: #2563eb;
  --accent-2: #0ea5e9;
  --accent-3: #22c55e;

  --code-bg: #0b1220;
  --code-text: #e2e8f0;
  --inline-code-bg: rgba(15, 23, 42, 0.06);

  --radius: 14px;
  --container: 1100px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f14;
    --surface: #111827;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --link: #7aa2ff;
    --border: rgba(226, 232, 240, 0.14);
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.35);

    --accent: #60a5fa;
    --accent-2: #38bdf8;
    --accent-3: #34d399;

    --code-bg: #0b1220;
    --code-text: #e2e8f0;
    --inline-code-bg: rgba(226, 232, 240, 0.08);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Helvetica,
    Arial,
    "Apple Color Emoji",
    "Segoe UI Emoji";
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  text-rendering: optimizeLegibility;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

code,
pre {
  font-family:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Monaco,
    Consolas,
    "Liberation Mono",
    "Courier New",
    monospace;
}

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  color: var(--text);
}

.logo-badge {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #ffffff;
  box-shadow: var(--shadow);
  font-size: 0.95rem;
}

.nav-toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 12px;
  padding: 0.55rem 0.75rem;
  font-weight: 600;
  cursor: pointer;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-group {
  position: relative;
}

.nav-group > summary {
  list-style: none;
  cursor: pointer;
  font-weight: 650;
  color: var(--muted);
  padding: 0.4rem 0.5rem;
  padding-right: 1.5rem;
  border-radius: 10px;
  user-select: none;
  position: relative;
  transition: color 0.15s ease, background 0.15s ease;
}

/* Chevron indicator */
.nav-group > summary::after {
  content: "";
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: 0.6;
  transition: transform 0.2s ease, opacity 0.15s ease;
}

.nav-group[open] > summary::after {
  transform: translateY(-50%) rotate(180deg);
  opacity: 1;
}

.nav-group > summary:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 60%, transparent);
}

.nav-group[open] > summary,
.nav-group.active > summary {
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 85%, transparent);
}

.nav-group > summary::-webkit-details-marker {
  display: none;
}

.nav-menu {
  position: absolute;
  top: calc(100% + 0.6rem);
  right: 0;
  width: min(320px, calc(100vw - 2rem));
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 0.6rem;
  display: grid;
  gap: 0.2rem;
  /* Dropdown animation */
  animation: dropdownFadeIn 0.15s ease-out;
  transform-origin: top right;
}

@keyframes dropdownFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.nav-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.65rem;
  border-radius: 12px;
  color: var(--text);
  font-weight: 600;
  transition: background 0.12s ease, transform 0.1s ease;
}

.nav-menu a small {
  color: var(--muted);
  font-weight: 600;
  transition: color 0.12s ease;
}

.nav-menu a:hover {
  text-decoration: none;
  background: var(--surface);
  transform: translateX(2px);
}

.nav-menu a:hover small {
  color: var(--text);
}

.nav-menu a:active {
  transform: translateX(2px) scale(0.98);
}

.nav-menu a[aria-current="page"] {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
}

.nav-menu a[aria-current="page"] small {
  color: var(--accent);
  opacity: 0.7;
}

.hero {
  padding: 3.75rem 0 2.25rem;
}

.hero-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: start;
}

.hero h1 {
  margin: 0 0 0.9rem;
  font-size: clamp(2.25rem, 3.2vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero p {
  margin: 0 0 1.25rem;
  color: var(--muted);
  max-width: 70ch;
  font-size: 1.05rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.3rem 0.6rem;
  font-weight: 650;
  font-size: 0.9rem;
  margin-bottom: 0.85rem;
}

.pill strong {
  color: var(--text);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  font-weight: 750;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #ffffff;
  box-shadow: var(--shadow);
}

.button:hover {
  text-decoration: none;
  filter: brightness(1.03);
}

.button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: none;
}

.button.secondary:hover {
  background: var(--surface);
}

.hero-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.hero-card h2 {
  margin: 0 0 0.6rem;
  font-size: 1.05rem;
}

.hero-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.section {
  padding: 2rem 0;
}

.section h2 {
  margin: 0 0 1rem;
  font-size: 1.4rem;
  letter-spacing: -0.015em;
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.callout {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 65%, transparent);
  border-radius: var(--radius);
  padding: 1rem 1rem;
}

.callout strong {
  color: var(--text);
}

.page {
  padding: 2rem 0 2.75rem;
}

.prose {
  font-size: 1.02rem;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  line-height: 1.2;
  letter-spacing: -0.015em;
  scroll-margin-top: 90px;
}

.prose h1 {
  margin: 0 0 1rem;
  font-size: 2rem;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.55rem;
}

.prose h3 {
  margin: 1.6rem 0 0.6rem;
  font-size: 1.25rem;
}

.prose p {
  margin: 0 0 1rem;
  color: var(--text);
}

.prose ul,
.prose ol {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
}

.prose li {
  margin: 0.35rem 0;
}

.prose blockquote {
  margin: 1.2rem 0;
  padding: 0.5rem 1rem;
  border-left: 3px solid color-mix(in srgb, var(--accent) 45%, transparent);
  color: var(--muted);
  background: color-mix(in srgb, var(--surface) 60%, transparent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.prose pre {
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: 14px;
  padding: 1rem;
  overflow: auto;
}

.prose code {
  background: var(--inline-code-bg);
  padding: 0.12rem 0.35rem;
  border-radius: 8px;
}

.prose pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.98rem;
}

.prose th,
.prose td {
  text-align: left;
  padding: 0.6rem 0.65rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.prose th {
  color: var(--muted);
  font-weight: 750;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.layout-two-col {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: minmax(0, 1fr);
}

.toc {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 55%, transparent);
  padding: 1rem;
  height: fit-content;
}

.toc h2 {
  margin: 0 0 0.6rem;
  font-size: 1rem;
  color: var(--muted);
  letter-spacing: 0;
}

.toc nav a {
  display: block;
  padding: 0.28rem 0.1rem;
  color: var(--muted);
  font-weight: 650;
  font-size: 0.95rem;
}

.toc nav a.toc-h3 {
  padding-left: 0.8rem;
  font-weight: 600;
  font-size: 0.93rem;
}

.toc nav a:hover {
  text-decoration: none;
  color: var(--text);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.6rem 0;
  color: var(--muted);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.footer-links a {
  color: var(--muted);
  font-weight: 650;
}

.footer-links a:hover {
  color: var(--text);
  text-decoration: none;
}

.muted {
  color: var(--muted);
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .grid.cols-3 {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    right: 1rem;
    left: 1rem;
    top: calc(100% + 0.75rem);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 0.6rem;
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav.open {
    display: flex;
  }

  .nav-group > summary {
    width: 100%;
  }

  .nav-menu {
    position: static;
    width: 100%;
    border: none;
    box-shadow: none;
    padding: 0.35rem 0 0.1rem;
    background: transparent;
    animation: none;
  }

  .nav-menu a:hover {
    transform: none;
  }

  .nav-menu a:active {
    transform: scale(0.98);
  }
}

@media (min-width: 980px) {
  .layout-two-col {
    grid-template-columns: 280px minmax(0, 1fr);
    align-items: start;
  }
}