:root {
  --mq-aqua: #50B6FF;
  --mq-turquoise: #2DCCCD;
  --mq-light-blue: #13599B;
  --mq-bg: #050816;
  --mq-bg-alt: #050816;
  --mq-text-main: #f7fafc;
  --mq-text-muted: #a0aec0;
  --mq-border-subtle: rgba(255,255,255,0.08);
}

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

html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, rgba(80,182,255,0.18), transparent 55%),
              radial-gradient(circle at bottom right, rgba(45,204,205,0.18), transparent 55%),
              #050816;
  color: var(--mq-text-main);
  min-height: 100%;
}

body {
  display: flex;
  flex-direction: column;
}

.mq-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.mq-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to right, rgba(5,8,22,0.92), rgba(5,8,22,0.80));
  border-bottom: 1px solid var(--mq-border-subtle);
}

.mq-header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.mq-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.mq-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: conic-gradient(from 160deg, var(--mq-aqua), var(--mq-turquoise), var(--mq-light-blue), var(--mq-aqua));
  padding: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.mq-logo-inner {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: radial-gradient(circle at 30% 20%, #0f172a, #020617);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mq-aqua);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.mq-logo-text {
  display: flex;
  flex-direction: column;
}

.mq-logo-title {
  font-size: 0.98rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mq-logo-subtitle {
  font-size: 0.75rem;
  color: var(--mq-text-muted);
}

.mq-header-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.82rem;
}

.mq-header-nav a {
  color: var(--mq-text-muted);
  text-decoration: none;
  position: relative;
  padding-bottom: 0.15rem;
}

.mq-header-nav a:hover {
  color: var(--mq-text-main);
}

.mq-header-nav a.mq-active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--mq-aqua), var(--mq-turquoise));
}

.mq-main {
  flex: 1;
}

.mq-main-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.25rem 1.5rem 3.5rem;
}

.mq-page-label {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mq-text-muted);
  margin-bottom: 0.85rem;
}

.mq-pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, #fff, var(--mq-aqua));
}

.mq-page-title {
  font-size: clamp(2rem, 3vw, 2.35rem);
  font-weight: 650;
  letter-spacing: 0.03em;
  margin-bottom: 0.4rem;
}

.mq-page-subtitle {
  max-width: 640px;
  font-size: 0.9rem;
  color: var(--mq-text-muted);
  line-height: 1.65;
}

.mq-updated {
  margin-top: 1.1rem;
  font-size: 0.78rem;
  color: var(--mq-text-muted);
}

.mq-grid {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
  gap: 1.75rem;
  margin-top: 2.25rem;
}

.mq-sidebar {
  position: sticky;
  top: 4.5rem;
  align-self: flex-start;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mq-toc {
  background: radial-gradient(circle at top left, rgba(80,182,255,0.12), transparent 55%),
              linear-gradient(to bottom right, rgba(15,23,42,0.98), rgba(15,23,42,0.88));
  border-radius: 1.25rem;
  border: 1px solid var(--mq-border-subtle);
  padding: 1.1rem 1.1rem 1.1rem;
}

.mq-toc-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--mq-text-muted);
  margin-bottom: 0.75rem;
}

.mq-toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mq-toc li {
  margin-bottom: 0.45rem;
}

.mq-toc a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.86rem;
  color: var(--mq-text-muted);
  text-decoration: none;
}

.mq-toc a::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: rgba(148,163,184,0.7);
}

.mq-toc a:hover {
  color: var(--mq-text-main);
}

.mq-tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--mq-border-subtle);
  color: var(--mq-text-muted);
}

.mq-tag-chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--mq-aqua), var(--mq-turquoise));
}

.mq-card {
  background: radial-gradient(circle at top left, rgba(80,182,255,0.10), transparent 60%),
              linear-gradient(to bottom right, rgba(15,23,42,0.97), rgba(15,23,42,0.90));
  border-radius: 1.25rem;
  border: 1px solid var(--mq-border-subtle);
  padding: 1.25rem 1.35rem 1.35rem;
}

.mq-article h2 {
  font-size: 1.05rem;
  margin-top: 1.3rem;
  margin-bottom: 0.35rem;
}

.mq-article h3 {
  font-size: 0.95rem;
  margin-top: 1.1rem;
  margin-bottom: 0.25rem;
}

.mq-article p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mq-text-muted);
  margin: 0.15rem 0 0.6rem;
}

.mq-article ul {
  padding-left: 1.1rem;
  margin: 0.2rem 0 0.7rem;
}

.mq-article li {
  font-size: 0.88rem;
  color: var(--mq-text-muted);
  margin-bottom: 0.25rem;
}

.mq-highlight {
  font-size: 0.86rem;
  padding: 0.65rem 0.8rem;
  border-radius: 0.9rem;
  background: rgba(15,23,42,0.92);
  border: 1px dashed rgba(148,163,184,0.5);
  margin: 0.6rem 0 0.8rem;
}

.mq-footer {
  border-top: 1px solid var(--mq-border-subtle);
  padding: 1.3rem 1.5rem 1.6rem;
  margin-top: auto;
  background: radial-gradient(circle at top, rgba(15,23,42,0.96), #020617);
}

.mq-footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--mq-text-muted);
}

.mq-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.mq-footer a {
  color: var(--mq-text-muted);
  text-decoration: none;
}

.mq-footer a:hover {
  color: var(--mq-text-main);
}

/* Responsive */
@media (max-width: 860px) {
  .mq-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .mq-sidebar {
    position: static;
  }
}

@media (max-width: 640px) {
  .mq-header-inner,
  .mq-main-inner,
  .mq-footer {
    padding-inline: 1rem;
  }
  .mq-header-nav {
    display: none;
  }
}