:root {
  --bg: #FFFFFF;
  --side: #FAFBFC;
  --ink: #1F2328;
  --soft: #57606A;
  --faint: #848D97;
  --line: #E4E7EB;
  --accent: #1A56DB;
  --accent-soft: #EFF4FF;
  --amber: #92610F;
  --amber-soft: #FBF4E4;
  --codebg: #F6F8FA;
  --codeink: #24292F;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, sans-serif;
  --sw: 260px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 15.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sw);
  background: var(--side);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  z-index: 40;
  padding: 24px 0 16px;
}

.brand {
  padding: 0 20px 16px;
}

.brand h1 {
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -.01em;
  line-height: 1.35;
}

.brand h1 a {
  color: var(--ink);
  text-decoration: none;
}

.brand .sub {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--faint);
  margin-top: 4px;
  letter-spacing: .04em;
}

.searchwrap {
  padding: 0 16px 12px;
  position: relative;
}

.searchwrap input {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 12.5px;
  font-family: var(--sans);
  outline: none;
  color: var(--ink);
}

.searchwrap input:focus {
  border-color: var(--accent);
}

nav {
  padding-bottom: 20px;
}

.glabel {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--faint);
  padding: 16px 20px 6px;
}

nav a {
  display: block;
  padding: 5px 20px;
  color: var(--soft);
  text-decoration: none;
  font-size: 13.5px;
  border-left: 2px solid transparent;
}

nav a:hover {
  color: var(--ink);
}

nav a.active {
  color: var(--ink);
  border-left-color: var(--accent);
  font-weight: 600;
  background: transparent;
}

.sidefoot {
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  color: var(--faint);
}

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

/* main */
.main {
  margin-left: var(--sw);
}

.content {
  max-width: 820px;
  padding: 48px 48px 100px;
}

h1.pagetitle {
  font-size: 27px;
  font-weight: 650;
  letter-spacing: -.015em;
  line-height: 1.25;
  margin-bottom: 12px;
}

.post-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 10px 0 24px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
}

h1, h2, h3, h4 {
  font-weight: 650;
  letter-spacing: -.01em;
  color: var(--ink);
}

h1 { font-size: 24px; margin: 36px 0 12px; }
h2 { font-size: 20px; margin: 32px 0 10px; border-bottom: 1px solid var(--line); padding-bottom: 6px; }
h3 { font-size: 16.5px; margin: 24px 0 8px; }
h4 { font-size: 14.5px; margin: 20px 0 6px; }

p {
  margin: 0 0 14px;
  max-width: 72ch;
}

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

.content a:hover {
  text-decoration: underline;
}

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--codebg);
  border: 1px solid var(--line);
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--codeink);
}

/* lists */
ul, ol {
  margin: 0 0 16px 20px;
}

li {
  margin-bottom: 6px;
  max-width: 70ch;
}

/* tables */
.tblwrap {
  overflow-x: auto;
  margin: 16px 0 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

th {
  font-size: 12px;
  font-weight: 600;
  text-align: left;
  color: var(--soft);
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  background: #FCFCFB;
  white-space: nowrap;
}

td {
  padding: 8px 12px;
  border-bottom: 1px solid #F0F2F0;
  vertical-align: top;
}

tr:last-child td {
  border-bottom: 0;
}

/* code blocks */
pre {
  background: var(--codebg);
  color: var(--codeink);
  padding: 14px 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  margin: 14px 0 22px;
}

pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
}

/* mobile toggle */
.menubtn {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 50;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 6px 12px;
  font-size: 12.5px;
  cursor: pointer;
  color: var(--ink);
}

@media (max-width: 880px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform .18s;
  }
  .sidebar.open {
    transform: none;
    box-shadow: 0 0 30px rgba(0,0,0,.18);
  }
  .menubtn {
    display: block;
  }
  .main {
    margin-left: 0;
  }
  .content {
    padding: 60px 20px 80px;
  }
  h1.pagetitle {
    font-size: 22px;
  }
}