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.menu-icon i:nth-child(3){top:13px}
.mobile-nav[open] .menu-icon i:nth-child(1){top:8px;transform:rotate(45deg)}
.mobile-nav[open] .menu-icon i:nth-child(2){opacity:0}
.mobile-nav[open] .menu-icon i:nth-child(3){top:8px;transform:rotate(-45deg)}
.mobile-nav-panel{position:absolute;top:calc(100% + 10px);right:0;width:min(88vw,340px);padding:7px;background:rgba(16,26,46,.98);border:1px solid var(--line);border-radius:16px;box-shadow:0 18px 42px rgba(0,0,0,.34);z-index:50}
.mobile-nav-panel:before{content:"";position:absolute;top:-6px;right:22px;width:11px;height:11px;background:var(--surface);border-left:1px solid var(--line);border-top:1px solid var(--line);transform:rotate(45deg)}
.mobile-nav-panel nav{display:flex;flex-direction:column;gap:2px;position:relative;z-index:1}
.mobile-nav-panel a{display:flex;align-items:center;min-height:46px;padding:10px 13px;color:var(--ink2);font-size:.95rem;font-weight:500;border-radius:11px}
.mobile-nav-panel a:after{content:"›";margin-left:auto;color:var(--dim);font-size:1.15rem;line-height:1}
.mobile-nav-panel a:hover,.mobile-nav-panel a:focus-visible{background:var(--surface2);color:var(--signal);outline:none}
.mobile-nav-panel a:hover:after,.mobile-nav-panel a:focus-visible:after{color:var(--signal)}
.mobile-nav-panel a:last-child{margin-top:5px;border-top:1px solid var(--line);border-radius:0 0 11px 11px;color:var(--signal)}
@media (max-width:639px){.mobile-nav{display:block}.desktop-nav,.desktop-rss{display:none!important}}
@media (max-width:380px){.mobile-nav-toggle{min-width:44px;width:44px;padding:0}.mobile-nav-label{display:none}.mobile-nav-panel{width:min(92vw,320px)}}
@media (prefers-reduced-motion:reduce){.mobile-nav-toggle,.menu-icon i{transition:none!important}}
html{scroll-behavior:smooth}
  body{background:#0B1220}

  /* Lop luoi nen tach rieng bang ::before de mask KHONG cat vao chu/noi dung ben trong */
  .bg-grid{ position:relative; }
  .bg-grid::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:
      linear-gradient(#233052 1px, transparent 1px),
      linear-gradient(90deg, #233052 1px, transparent 1px);
    background-size: 42px 42px;
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%);
    mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%);
    pointer-events: none;
    z-index: 0;
  }
  .bg-grid > *{ position: relative; z-index: 1; }

  @keyframes pulseNode{
    0%,100%{ transform: scale(1); opacity:1 }
    50%{ transform: scale(1.6); opacity:.35 }
  }
  .node-pulse{ animation: pulseNode 2.6s ease-in-out infinite; transform-origin: center; }
  .node-pulse.d1{ animation-delay:.3s }
  .node-pulse.d2{ animation-delay:.9s }
  .node-pulse.d3{ animation-delay:1.5s }
  .node-pulse.d4{ animation-delay:.6s }
  @keyframes dash{
    to{ stroke-dashoffset: 0 }
  }
  .link-line{
    stroke-dasharray: 4 6;
    stroke-dashoffset: 60;
    animation: dash 3.5s linear infinite;
  }
  @keyframes blink{ 50%{ opacity:0 } }
  .caret{ animation: blink 1s step-end infinite; }
  details > summary{ list-style:none; cursor:pointer; }
  details > summary::-webkit-details-marker{ display:none; }
  details[open] .chev{ transform: rotate(180deg); }
  @media (prefers-reduced-motion: reduce){
    .node-pulse, .link-line, .caret{ animation:none !important; }
  }
  .prose-dark :where(p,ul,ol,li,h2,h3,h4,blockquote){ color:#E9EDF6; }
  .prose-dark h2{ font-size:1.4rem; font-weight:700; margin-top:2rem; margin-bottom:.75rem; }
  .prose-dark h3{ font-size:1.15rem; font-weight:600; margin-top:1.5rem; margin-bottom:.5rem; }
  .prose-dark p{ line-height:1.8; margin-bottom:1.1rem; color:#C7D0E3; }
  .prose-dark a{ color:#3B82F6; text-decoration:underline; text-underline-offset:2px; }
  .prose-dark img{ border-radius:.75rem; border:1px solid #233052; }
  .prose-dark ul, .prose-dark ol{ padding-left:1.25rem; margin-bottom:1.1rem; color:#C7D0E3; }
  .prose-dark li{ margin-bottom:.4rem; }
  .prose-dark blockquote{ border-left:3px solid #3B82F6; padding-left:1rem; color:#93A1C2; font-style:italic; }
  .col-span-6{grid-column:span 6/span 6}
.lg\:col-span-6{grid-column:span 6/span 6}
.max-h-\[250px\]{max-height:250px}
.imagesimple{width:70%;height:auto;margin:0 auto;display: block;}