:root {
  --bg: #020604;
  --panel: rgba(2, 16, 8, 0.88);
  --border: rgba(37, 226, 123, 0.34);
  --text: #74ff9f;
  --muted: #8bd8a3;
  --accent: #32ff7e;
  --accent-strong: #b7ffd1;
  --code: rgba(0, 10, 4, 0.94);
  --code-border: rgba(50, 255, 126, 0.42);
  --code-accent: #32ff7e;
  --code-muted: #3b8c54;
  --scrollbar-thumb: rgba(50, 255, 126, 0.36);
  --scrollbar-thumb-hover: rgba(50, 255, 126, 0.58);
  --scrollbar-track: rgba(0, 10, 4, 0.78);
  --matrix-rain: on;
  --mermaid-node-bg: #0b1a10;
  --mermaid-node-text: #b8ffd1;
  --mermaid-node-border: #2fb86b;
  --mermaid-line: #3ec97a;
  --mermaid-edge-label-bg: #102216;
  --mermaid-title: #74ff9f;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background:
    linear-gradient(180deg, rgba(0, 255, 102, 0.08), transparent 14%),
    radial-gradient(circle at top, rgba(80, 255, 150, 0.08), transparent 30%),
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 72px,
      rgba(38, 212, 111, 0.04) 72px,
      rgba(38, 212, 111, 0.04) 74px
    ),
    linear-gradient(180deg, #010402 0%, var(--bg) 100%);
  color: var(--text);
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  line-height: 1.72;
}

body {
  padding: 24px 16px 44px;
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

#theme-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

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

a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.site-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 26px 40px;
  position: relative;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(32, 255, 132, 0.04), transparent 16%),
    var(--panel);
  border: 1px solid var(--border);
  border-radius: 0;
  box-shadow:
    0 0 0 1px rgba(40, 255, 130, 0.08),
    0 26px 80px rgba(0, 0, 0, 0.42);
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
}

.site-header {
  margin-bottom: 28px;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.site-footer {
  margin-top: 36px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.92rem;
}

.site-brand {
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

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

.site-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 2rem 2.25rem;
  background:
    radial-gradient(circle at top center, rgba(50, 255, 126, 0.08), transparent 36%),
    rgba(0, 12, 4, 0.82);
  border: 1px solid var(--border);
  box-shadow:
    inset 0 0 0 1px rgba(50, 255, 126, 0.08),
    0 0 28px rgba(18, 255, 108, 0.12);
}

.site-main h1:first-child { margin-top: 0; }

h1, h2, h3 {
  color: var(--text);
  line-height: 1.08;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

h1 {
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  margin-bottom: 0.8rem;
  text-shadow: 0 0 14px rgba(50, 255, 126, 0.18);
}

h2 {
  font-size: 1.45rem;
  margin-top: 2.45rem;
}

h3 {
  font-size: 1.02rem;
  margin-top: 1.6rem;
}

p, li {
  color: var(--muted);
  font-size: 1rem;
}

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

.header-anchor {
  margin-left: 0.45rem;
  color: var(--accent);
  text-decoration: none;
  opacity: 0;
  transition: opacity 120ms ease;
}

h1:hover .header-anchor,
h2:hover .header-anchor,
h3:hover .header-anchor,
h1:focus-within .header-anchor,
h2:focus-within .header-anchor,
h3:focus-within .header-anchor {
  opacity: 1;
}

code, pre {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

code {
  padding: 0.12rem 0.34rem;
  border-radius: 4px;
  background: rgba(50, 255, 126, 0.08);
  color: var(--text);
}

pre {
  overflow-x: auto;
  padding: 18px 20px;
  border: 1px solid var(--code-border);
  border-radius: 0;
  background:
    linear-gradient(180deg, rgba(50, 255, 126, 0.05), transparent 20%),
    var(--code);
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

pre code {
  padding: 0;
  background: transparent;
}

.code-block {
  position: relative;
  margin: 1.2rem 0;
}

.code-block pre,
.highlight pre,
pre.highlight {
  margin: 0;
}

.copy-button {
  position: absolute;
  top: 12px;
  right: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--code-border);
  border-radius: 0;
  width: 1.95rem;
  height: 1.95rem;
  background: rgba(0, 12, 4, 0.96);
  color: var(--text);
  cursor: pointer;
}

.copy-button:hover {
  background: rgba(2, 24, 8, 0.98);
}

.copy-icon {
  width: 0.92rem;
  height: 0.92rem;
  fill: currentColor;
}

.highlight .c,
.highlight .cm,
.highlight .c1,
.highlight .cs { color: var(--code-muted); font-style: italic; }
.highlight .k,
.highlight .kc,
.highlight .kd,
.highlight .kn,
.highlight .kp,
.highlight .kr,
.highlight .kt { color: #80ffb6; font-weight: 600; }
.highlight .s,
.highlight .sa,
.highlight .sb,
.highlight .sc,
.highlight .sd,
.highlight .s1,
.highlight .s2,
.highlight .dl { color: #dcff8d; }
.highlight .m,
.highlight .mf,
.highlight .mh,
.highlight .mi,
.highlight .il,
.highlight .mo { color: #5efca1; }
.highlight .na,
.highlight .nb,
.highlight .nc,
.highlight .nf,
.highlight .fm { color: #7af9ff; }
.highlight .o,
.highlight .ow,
.highlight .p { color: #baf7cd; }
.highlight .nv,
.highlight .vc,
.highlight .vg,
.highlight .vi { color: var(--code-accent); }
.highlight .gh,
.highlight .gu { color: #d9ffe7; font-weight: 700; }
.highlight .gp { color: #32ff7e; }
.highlight .go,
.highlight .w { color: #2f7545; }

blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 0 0.25rem 1rem;
  border-left: 4px solid var(--accent);
  background: rgba(50, 255, 126, 0.04);
  color: var(--text);
}

img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
}

.card-grid {
  display: grid;
  gap: 1rem;
  margin: 1.35rem 0;
}

.card-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.card-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.content-card {
  padding: 0.95rem 1rem;
  border: 1px solid var(--border);
  background: rgba(0, 10, 4, 0.78);
}

.content-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
}

.content-card h3 a {
  color: var(--text);
}

.content-card p {
  margin: 0;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.card-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.12rem 0.44rem;
  border: 1px solid var(--border);
  color: var(--accent-strong);
  font-size: 0.78rem;
}

.mermaid {
  margin: 1.2rem 0;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

.mermaid svg {
  display: block;
  max-width: 100%;
  height: auto;
}

th, td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

th { color: var(--text); }

*::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

*::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

*::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

@media (max-width: 720px) {
  .card-grid-2,
  .card-grid-3,
  .card-grid-4 {
    grid-template-columns: 1fr;
  }
}