html, body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

:root {
  --sidebar-width: 250px;
  --content-width: calc(100vw - var(--sidebar-width));
  --content-center-x: calc(50vw + (var(--sidebar-width) / 2));
  --sidebar-bg: #0d1114;
  --sidebar-border: rgba(255, 255, 255, 0.12);
  --sidebar-border-mobile: rgba(255, 255, 255, 0.12);
  --nav-link-color: #ecf0f1;
  --nav-link-border: rgba(255, 255, 255, 0.15);
  --nav-link-bg: rgba(255, 255, 255, 0.02);
  --nav-link-bg-hover: rgba(156, 205, 59, 0.12);
  --nav-link-border-hover: rgba(156, 205, 59, 0.7);
  --nav-link-active-bg: rgba(156, 205, 59, 0.18);
  --nav-link-active-border: rgba(156, 205, 59, 0.85);
  --nav-link-active-color: #f8f9fa;
  --accent: #9ccd3b;
  --explore-link-border: rgba(255, 255, 255, 0.15);
  --explore-link-bg: rgba(255, 255, 255, 0.02);
  --explore-link-bg-hover: rgba(156, 205, 59, 0.12);
  --explore-toggle-border: rgba(156, 205, 59, 0.75);
  --explore-toggle-border-hover: rgba(156, 205, 59, 1);
  --explore-toggle-bg: linear-gradient(145deg, rgba(156, 205, 59, 0.4), rgba(156, 205, 59, 0.18));
  --explore-toggle-bg-hover: linear-gradient(145deg, rgba(156, 205, 59, 0.55), rgba(156, 205, 59, 0.26));
  --explore-toggle-text: #f5f5f5;
}

@media (prefers-color-scheme: light) {
  :root {
    --sidebar-bg: #f8faf8;
    --sidebar-border: rgba(17, 24, 39, 0.12);
    --sidebar-border-mobile: rgba(17, 24, 39, 0.12);
    --nav-link-color: #1f2937;
    --nav-link-border: rgba(17, 24, 39, 0.16);
    --nav-link-bg: rgba(255, 255, 255, 0.78);
    --nav-link-bg-hover: rgba(156, 205, 59, 0.16);
    --nav-link-border-hover: rgba(111, 150, 38, 0.45);
    --nav-link-active-bg: rgba(156, 205, 59, 0.24);
    --nav-link-active-border: rgba(111, 150, 38, 0.55);
    --nav-link-active-color: #111827;
    --explore-link-border: rgba(17, 24, 39, 0.16);
    --explore-link-bg: rgba(255, 255, 255, 0.8);
    --explore-link-bg-hover: rgba(156, 205, 59, 0.16);
    --explore-toggle-border: rgba(111, 150, 38, 0.65);
    --explore-toggle-border-hover: rgba(111, 150, 38, 0.85);
    --explore-toggle-bg: linear-gradient(145deg, rgba(156, 205, 59, 0.24), rgba(156, 205, 59, 0.12));
    --explore-toggle-bg-hover: linear-gradient(145deg, rgba(156, 205, 59, 0.34), rgba(156, 205, 59, 0.2));
    --explore-toggle-text: #1f2937;
  }
}

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
  width: 100%;
  max-width: 100vw;
  position: relative;
}

.content-column {
  min-width: 0;
  width: calc(100vw - var(--sidebar-width));
  max-width: calc(100vw - var(--sidebar-width));
  position: relative;
  overflow-x: hidden;
  grid-column: 2;
}

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  align-self: start;
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--sidebar-bg);
  color: var(--nav-link-color);
  border-right: 1px solid var(--sidebar-border);
  overflow: hidden;
  z-index: 50;
}

.sidebar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem 1.25rem 1.25rem;
}

.brand-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.brand-name {
  color: var(--accent);
}

.sidebar-panel {
  position: relative;
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  min-height: 0;
}

.nav {
  display: grid;
  gap: 0.65rem;
  padding: 0 1.25rem;
}

.nav a {
  color: var(--nav-link-color);
  text-decoration: none;
  padding: 0.7rem 0.8rem;
  border-width: 1px 0;
  border-style: solid;
  border-color: var(--nav-link-border);
  background: var(--nav-link-bg);
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.nav a:hover,
.nav a:focus-visible {
  background: var(--nav-link-bg-hover);
  border-color: var(--nav-link-border-hover);
  transform: translateX(2px);
  outline: none;
}

.nav a.is-active,
.nav a[aria-current="page"] {
  background: var(--nav-link-active-bg);
  border-color: var(--nav-link-active-border);
  color: var(--nav-link-active-color);
  font-weight: 700;
}

.social {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.25rem 0.25rem;
}

.social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  color: var(--nav-link-color);
  background: var(--nav-link-bg);
  border: 1px solid var(--nav-link-border);
  border-radius: 999px;
  text-decoration: none;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.social a svg {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
}

.social a:hover,
.social a:focus-visible {
  transform: translateY(-2px);
  background: var(--nav-link-active-bg);
  border-color: var(--nav-link-active-border);
  color: var(--accent);
  outline: none;
}

.site-explore {
  position: relative;
  margin-top: auto;
  padding: 0 1.25rem 1.25rem;
  background: var(--sidebar-bg);
}

.explore-panel {
  display: grid;
  gap: 0.45rem;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px);
  transition: max-height 260ms ease, opacity 180ms ease, transform 260ms ease;
  padding: 0;
}

.explore-panel a {
  color: var(--nav-link-color);
  text-decoration: none;
  padding: 0.55rem 0.7rem;
  border-width: 1px 0;
  border-style: solid;
  border-color: var(--explore-link-border);
  background: var(--explore-link-bg);
  font-size: 0.92rem;
}

.explore-panel a:hover,
.explore-panel a:focus-visible {
  background: var(--explore-link-bg-hover);
  outline: none;
}

.explore-toggle {
  position: relative;
  width: 100%;
  margin: 0.25rem 0 0.5rem;
  padding: 0.85rem 2.6rem 0.85rem 1rem;
  border-width: 1px 0;
  border-style: solid;
  border-color: var(--explore-toggle-border);
  background: var(--explore-toggle-bg);
  color: var(--explore-toggle-text);
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 260ms ease, background-color 180ms ease, border-color 180ms ease;
}

.explore-toggle::before,
.explore-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 1rem;
  width: 0.6rem;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform 220ms ease;
}

.explore-toggle::before {
  transform: translate(-0.18rem, -0.15rem) rotate(-45deg);
}

.explore-toggle::after {
  transform: translate(0.18rem, -0.15rem) rotate(45deg);
}

.explore-toggle:hover,
.explore-toggle:focus-visible {
  background: var(--explore-toggle-bg-hover);
  border-color: var(--explore-toggle-border-hover);
  outline: none;
}

.site-explore.is-open .explore-panel {
  max-height: 220px;
  opacity: 1;
  transform: translateY(0);
}

.site-explore.is-open .explore-toggle::before {
  transform: translate(0, -0.06rem) rotate(45deg);
}

.site-explore.is-open .explore-toggle::after {
  transform: translate(0, -0.06rem) rotate(-45deg);
}

.sidebar-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--nav-link-border);
  border-radius: 12px;
  background: var(--nav-link-bg);
  color: var(--nav-link-color);
  cursor: pointer;
}

.sidebar-menu-icon {
  position: relative;
  display: block;
  width: 1.1rem;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
}

.sidebar-menu-icon::before,
.sidebar-menu-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 1.1rem;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform 180ms ease, top 180ms ease, opacity 180ms ease;
}

.sidebar-menu-icon::before {
  top: -0.38rem;
}

.sidebar-menu-icon::after {
  top: 0.38rem;
}

.sidebar.is-open .sidebar-menu-icon {
  background: transparent;
}

.sidebar.is-open .sidebar-menu-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.sidebar.is-open .sidebar-menu-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .content-column {
    width: 100%;
    max-width: 100%;
    margin-left: 0;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: auto;
    min-height: 0;
    border-top: 0;
    border-right: 0;
    border-bottom: 1px solid var(--sidebar-border-mobile);
    z-index: 1200;
  }

  .sidebar-top {
    padding: 1rem 1.25rem;
  }

  .sidebar-menu-toggle {
    display: inline-flex;
  }

  .sidebar-panel {
    display: none;
  }

  .sidebar.is-open .sidebar-panel {
    display: flex;
    flex-direction: column;
    padding-bottom: 0.5rem;
  }

  .site-explore {
    padding: 0 1.25rem 0.5rem;
  }
}