:root {
  --max-content-width: 1180px;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-width: 320px;
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 70% -10%, rgba(255, 122, 24, 0.18), transparent 34rem),
    linear-gradient(180deg, #06080b 0%, #030406 100%);
  letter-spacing: 0;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.72), transparent 78%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
}

.app-shell {
  min-height: 100vh;
}

.brand-heading {
  margin: 0;
  color: var(--text);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.sidebar,
.sidebar-overlay,
.mobile-topbar {
  display: none !important;
}

.content {
  min-height: 100vh;
}

.content-inner {
  width: min(100% - 2rem, var(--max-content-width));
  margin: 0 auto;
  padding: 36px 0 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 7, 10, 0.82);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(18px);
}

.topbar-inner {
  width: min(100% - 2rem, var(--max-content-width));
  min-height: 62px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.topbar-brand {
  display: inline-flex;
  align-items: center;
  min-width: max-content;
  color: var(--text);
  line-height: 0;
}

.topbar-brand-logo {
  display: block;
  width: 106px;
  height: auto;
}

.topbar-brand picture {
  display: block;
  line-height: 0;
}

.topbar-brand-mark,
.brand-mark {
  width: 18px;
  height: 18px;
  display: inline-block;
  position: relative;
  transform: rotate(45deg);
  border: 4px solid var(--accent);
}

.topbar-brand-mark::after,
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 4px solid var(--accent);
}

.topbar-menu {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.topbar-link,
.topbar-group-toggle,
.topbar-status {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.42rem 0.7rem;
  color: var(--text-muted);
  background: transparent;
  font: inherit;
  font-size: 0.84rem;
  line-height: 1;
  cursor: pointer;
}

.topbar-link:hover,
.topbar-link.active,
.topbar-group.active > .topbar-group-toggle,
.topbar-group.open > .topbar-group-toggle {
  color: var(--text);
  border-color: var(--border);
  background: var(--surface-soft);
}

.topbar-status {
  color: #8effbd;
  border-color: rgba(67, 209, 122, 0.2);
  background: rgba(67, 209, 122, 0.07);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.topbar-group {
  position: relative;
}

.chevron {
  width: 7px;
  height: 7px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
}

.topbar-dropdown {
  position: absolute;
  top: calc(100% + 0.45rem);
  left: 0;
  min-width: 230px;
  padding: 0.4rem;
  display: grid;
  gap: 0.15rem;
  background: rgba(10, 13, 18, 0.98);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.36);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 140ms ease, transform 140ms ease, visibility 140ms ease;
}

.topbar-group:hover .topbar-dropdown,
.topbar-group.open .topbar-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.topbar-dropdown-link {
  display: block;
  padding: 0.62rem 0.68rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
}

.topbar-dropdown-link:hover,
.topbar-dropdown-link.active {
  color: var(--text);
  background: var(--surface-soft);
}

.theme-toggle {
  display: none;
}

.topbar-menu-toggle {
  display: none;
  margin-left: auto;
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text);
  border-radius: var(--radius-sm);
  min-height: 34px;
  padding: 0.45rem 0.75rem;
  font: inherit;
  font-size: 0.86rem;
  cursor: pointer;
}

.page-header,
.subpage-hero {
  position: relative;
  overflow: hidden;
  margin: 0 0 var(--space-5);
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--border);
}

.subpage-hero::before,
.page-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(5, 7, 10, 0.92), rgba(5, 7, 10, 0.58), rgba(255, 122, 24, 0.1)),
    var(--banner-image, radial-gradient(circle at 75% 70%, rgba(255, 122, 24, 0.32), transparent 22rem));
  background-size: cover;
  background-position: center;
  opacity: 0.92;
}

.page-header h1,
.subpage-hero h1 {
  max-width: 740px;
  margin: 0;
  color: var(--text);
  font-size: clamp(2.4rem, 7vw, 5.9rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.page-header p,
.subpage-hero p {
  max-width: 520px;
  margin: 1rem 0 0;
  color: var(--text-soft);
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  line-height: 1.55;
}

.post-header {
  min-height: calc(100svh - 62px);
  display: grid;
  align-content: center;
}

.post-header h1 {
  max-width: 980px;
  font-size: clamp(3.6rem, 6.3vw, 6.6rem);
}

.page-body {
  display: grid;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
}

.section {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-3);
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
}

.section-heading p {
  max-width: 460px;
  margin: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

.grid,
.product-grid,
.tool-grid,
.lab-grid,
.feature-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-3);
}

.home-lab-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  gap: var(--space-3);
  align-items: start;
}

.home-lab-posts .lab-card {
  grid-column: span 6;
}

.home-tools-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 0.72fr);
  gap: var(--space-3);
  align-items: stretch;
}

.home-tools-main {
  display: grid;
  gap: var(--space-3);
}

.site-footer {
  display: grid;
  gap: 0.7rem;
  margin: var(--space-5) 0 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.site-footer-main {
  min-height: 148px;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(320px, 1.35fr) minmax(260px, 1.12fr);
  align-items: stretch;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 18% 32%, rgba(255, 122, 24, 0.08), transparent 14rem),
    linear-gradient(180deg, rgba(255, 255, 255, 0.026), rgba(255, 255, 255, 0.01)),
    rgba(6, 8, 11, 0.9);
  color: var(--text-muted);
  font-size: 0.8rem;
}

.site-footer-brand,
.site-footer-sitemap,
.site-footer-loop {
  padding: clamp(1rem, 2vw, 1.35rem);
}

.site-footer-brand {
  display: grid;
  align-content: start;
  gap: 0.65rem;
  min-height: 100%;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.016) 1px, transparent 1px);
  background-size: 26px 26px;
  border-right: 1px solid var(--border);
}

.site-footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  width: fit-content;
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0;
}

.site-footer-logo img {
  width: 18px;
  height: 18px;
}

.site-footer-logo picture {
  display: block;
  line-height: 0;
}

.site-footer-brand p,
.site-footer-loop p,
.site-footer-lower p {
  margin: 0;
}

.site-footer-brand p {
  max-width: 190px;
  line-height: 1.55;
}

.site-footer-sitemap {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 2rem);
  border-right: 1px solid var(--border);
}

.site-footer-sitemap div,
.site-footer-loop {
  display: grid;
  align-content: start;
  gap: 0.55rem;
}

.site-footer-sitemap h2,
.site-footer-loop h2 {
  margin: 0 0 0.25rem;
  color: var(--text);
  font-size: 0.74rem;
  line-height: 1.15;
  text-transform: uppercase;
}

.site-footer-sitemap a,
.site-footer-loop p {
  color: var(--text-muted);
  line-height: 1.45;
}

.site-footer-sitemap a:hover {
  color: var(--accent);
}

.site-footer-lower a:hover {
  color: #8effbd;
}

.site-footer-email {
  min-height: 38px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 42px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(3, 5, 8, 0.8);
}

.site-footer-email input {
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 0 0.85rem;
  font: inherit;
  outline: none;
}

.site-footer-email button {
  border: 0;
  border-left: 1px solid rgba(0, 0, 0, 0.24);
  background: var(--accent);
  color: #140802;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.site-footer-lower {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.site-footer-lower a {
  color: var(--green);
}

.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;
}

@media (max-width: 860px) {
  .topbar-inner {
    min-height: 58px;
  }

  .topbar-menu-toggle {
    display: inline-flex;
    align-items: center;
  }

  .topbar-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    margin-left: 0;
    padding: 0.75rem 1rem 1rem;
    background: rgba(5, 7, 10, 0.98);
    border-bottom: 1px solid var(--border);
  }

  .topbar.menu-open .topbar-menu {
    display: grid;
    gap: var(--space-2);
  }

  .topbar-nav {
    display: grid;
    gap: 0.25rem;
  }

  .topbar-link,
  .topbar-group-toggle,
  .topbar-status {
    width: 100%;
    justify-content: space-between;
  }

  .topbar-dropdown {
    position: static;
    min-width: 0;
    display: none;
    margin: 0.25rem 0 0.5rem;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
  }

  .topbar-group:hover .topbar-dropdown {
    display: none;
  }

  .topbar-group.open .topbar-dropdown {
    display: grid;
  }

  .section-heading,
  .home-lab-layout,
  .home-tools-layout,
  .site-footer-main {
    align-items: start;
    grid-template-columns: 1fr;
  }

  .site-footer-brand,
  .site-footer-sitemap {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .site-footer-lower {
    padding: 0;
  }
}

@media (max-width: 640px) {
  .content-inner,
  .topbar-inner {
    width: min(100% - 1.25rem, var(--max-content-width));
  }

  .content-inner {
    padding-top: 24px;
  }

  .home-lab-posts .lab-card {
    grid-column: 1 / -1;
  }

  .site-footer-sitemap {
    grid-template-columns: 1fr;
  }

  .site-footer-lower {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }
}