:root {
  --bg: #0e0a14;
  --bg-grad:
    radial-gradient(1100px 560px at 12% -10%, #241338 0%, transparent 62%),
    radial-gradient(900px 500px at 95% 0%, #0c2b38 0%, transparent 55%);
  --surface: #17102180;
  --surface-solid: #171021;
  --surface-2: #221733;
  --border: #2e2140;
  --border-soft: #241a34;

  --accent: #a855f7;        
  --accent-soft: #cfa4ff;
  --accent-dim: #6d3fa0;

  --cyan: #22d3ee;
  --cyan-soft: #7ee7f8;
  --indigo: #6366f1;
  --emerald: #34d399;
  --emerald-soft: #86efc4;
  --amber: #fbbf24;
  --amber-soft: #ffd782;
  --rose: #fb7185;
  --rose-soft: #ffa3ae;

  
  --grad-mark: linear-gradient(145deg, #a855f7, #5b2a8f);
  --grad-brand: linear-gradient(145deg, #a855f7 0%, #6366f1 55%, #22d3ee 100%);

  --text: #ece7f5;
  --muted: #a99dbd;
  --sidebar-text: #cabee0;   

  --sidebar-w: 244px;
  --radius: 12px;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "Fira Code", "SFMono-Regular", Menlo, Consolas, monospace;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background-color: var(--bg);
  background-image: var(--bg-grad);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-soft); text-decoration: none; }
a:hover { color: #e6d0ff; }

::selection { background: var(--accent-dim); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface-2);
  padding: 10px 16px;
  z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }



.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  padding: 28px 18px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  background: #130d1d;
  border-right: 1px solid var(--border);
  box-shadow: 1px 0 0 #a855f71f;
  z-index: 40;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.32rem;
  letter-spacing: -0.02em;
}
.brand:hover { color: #fff; }

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--grad-mark);
  color: #fff;
  font-family: var(--font-mono);
  font-size: .85rem;
  font-weight: 700;
  box-shadow: 0 0 18px #a855f755;
}

.nav { display: flex; flex-direction: column; gap: 5px; }

.nav-item {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: 9px;
  color: var(--sidebar-text);
  font-weight: 600;
  font-size: .97rem;
  letter-spacing: .005em;
  border: 1px solid transparent;
  border-left: 2px solid transparent;
  transition: background .15s, color .15s, border-color .15s;
}
.nav-item:hover {
  background: #ffffff0d;
  color: #fff;
  border-left-color: var(--accent);
}
.nav-item.is-active {
  background: linear-gradient(90deg, #a855f738, transparent 85%);
  border-color: var(--border);
  border-left-color: var(--accent);
  color: #fff;
}

.nav-ext { margin-left: auto; font-size: .8em; opacity: .55; }

.sidebar-foot {
  margin-top: auto;
  font-size: .88rem;
  color: var(--sidebar-text);
  border-top: 1px solid var(--border-soft);
  padding-top: 16px;
}

.nav-toggle {
  display: none;
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 60;
  width: 42px;
  height: 42px;
  padding: 11px 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #150e20ee;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  margin: 3px 0;
}
.nav-toggle span:nth-child(1) { background: var(--accent); }
.nav-toggle span:nth-child(2) { background: var(--indigo); }
.nav-toggle span:nth-child(3) { background: var(--cyan); }

.nav-scrim {
  position: fixed;
  inset: 0;
  background: #05030a99;
  z-index: 35;
}



.content {
  margin-left: var(--sidebar-w);
  padding: 56px 40px 96px;
  max-width: calc(var(--sidebar-w) + 880px);
}

.page-head { margin-bottom: 34px; }
.page-title {
  margin: 0 0 6px;
  font-size: 2.1rem;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.page-sub { margin: 0; color: var(--muted); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin: 40px 0 16px;
}
.section-head h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--muted);
  font-weight: 600;
}
.section-head h2::before {
  content: "";
  width: 3px;
  height: 1.05em;
  border-radius: 2px;
  background: var(--grad-brand);
}



.card-list { display: flex; flex-direction: column; gap: 14px; }

.card {
  position: relative;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;   
  overflow: hidden;
  transition: border-color .15s, transform .15s, box-shadow .15s;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--card-c, var(--accent));
  opacity: 0;
  transition: opacity .15s;
}
.card:hover {
  border-color: color-mix(in srgb, var(--card-c, var(--accent)) 55%, var(--border));
  transform: translateY(-2px);
  box-shadow: 0 8px 28px #05030a80;
}
.card:hover::before { opacity: 1; }

.card .chip { cursor: pointer; }

.card-title {
  display: block;
  font-size: 1.22rem;
  font-weight: 650;
  color: var(--text);
  letter-spacing: -0.015em;
}
.card:hover .card-title { color: var(--card-c, var(--accent-soft)); }

.card-meta, .post-meta {
  margin-top: 4px;
  font-size: .84rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

.card-summary { margin: 10px 0 0; color: #c8bfda; }



.chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 13px; }

.chip {
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #a855f714;
  color: var(--accent-soft);
  font-size: .78rem;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
}
.chip {
  color: var(--chip, var(--accent-soft));
  border-color: color-mix(in srgb, var(--chip, var(--accent)) 38%, var(--border));
  background: color-mix(in srgb, var(--chip, var(--accent)) 13%, transparent);
}
.chip:hover {
  background: color-mix(in srgb, var(--chip, var(--accent)) 26%, transparent);
  border-color: var(--chip, var(--accent));
}
.chip.is-on {
  background: var(--chip, var(--accent));
  border-color: var(--chip, var(--accent));
  color: #140b1e;
  font-weight: 700;
}
.tag-count-inline {
  margin-left: 5px;
  opacity: .6;
  font-size: .92em;
}




.toolbar {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  margin-bottom: 22px;
}

.toolbar-summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 18px;
  cursor: pointer;
  color: var(--text);
  font-weight: 600;
  font-size: .95rem;
  list-style: none;               
  user-select: none;
  border-radius: var(--radius);
}
.toolbar-summary::-webkit-details-marker { display: none; }   
.toolbar-summary:hover { background: #ffffff08; }
.toolbar[open] .toolbar-summary {
  border-bottom: 1px solid var(--border-soft);
  border-radius: var(--radius) var(--radius) 0 0;
}

.toolbar-icon { color: var(--muted); font-size: 1.1em; }

.toolbar-active {
  padding: 1px 9px;
  border-radius: 999px;
  background: var(--accent);
  color: #140b1e;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
}

.toolbar-chevron {
  margin-left: auto;
  color: var(--muted);
  transition: transform .18s ease;
}
.toolbar[open] .toolbar-chevron { transform: rotate(180deg); }

.toolbar-body { padding: 16px 18px; }

.search-box { position: relative; }
.search-box input {
  width: 100%;
  padding: 12px 14px 12px 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0f0a17;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
}
.search-box input::placeholder { color: #8a7fa1; }
.search-box input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px #22d3ee2e;
}
.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: flex-end;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-soft);
}
.filter-group { display: flex; flex-direction: column; gap: 7px; }
.filter-label {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--muted);
  font-weight: 600;
}
.filter-group .chips { margin-top: 0; }

.date-inputs { display: flex; align-items: center; gap: 8px; }
.date-inputs span { color: var(--muted); }
input[type="date"], select {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0f0a17;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: .85rem;
  color-scheme: dark;
}
input[type="date"]:focus, select:focus { outline: none; border-color: var(--cyan); }

.filter-actions { margin-left: auto; }


.btn-search {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--grad-mark);
  color: #fff;
  font: inherit;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 0 14px #a855f74d;
  transition: filter .15s, box-shadow .15s;
}
.btn-search:hover { filter: brightness(1.12); box-shadow: 0 0 20px #a855f777; }
.btn-search:active { filter: brightness(.94); }

.btn-reset {
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--muted);
  font: inherit;
  font-size: .85rem;
  cursor: pointer;
}
.btn-reset:hover { color: var(--rose-soft); border-color: var(--rose); }

.result-count {
  margin: 0 0 14px;
  font-size: .85rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

.empty {
  padding: 40px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}



.post { max-width: 780px; }

.post-head {
  padding-bottom: 22px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border);
}
.post-title {
  margin: 0;
  font-size: 2.35rem;
  line-height: 1.14;
  letter-spacing: -0.035em;
}

.prose { font-size: 1.02rem; }
.prose h2, .prose h3, .prose h4 {
  margin: 2em 0 .6em;
  line-height: 1.25;
  letter-spacing: -0.02em;
}
.prose h2 {
  font-size: 1.55rem;
  padding-bottom: .25em;
  border-bottom: 1px solid var(--border-soft);
}
.prose h3 { font-size: 1.25rem; color: var(--cyan-soft); }
.prose h4 { font-size: 1.08rem; color: var(--accent-soft); }
.prose p, .prose ul, .prose ol { margin: 0 0 1.1em; }
.prose li { margin-bottom: .35em; }
.prose li::marker { color: var(--accent); }
.prose img { max-width: 100%; height: auto; border-radius: 10px; }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 2.4em 0; }
.prose strong { color: #fff; }

.prose blockquote {
  margin: 1.4em 0;
  padding: 2px 20px;
  border-left: 3px solid var(--cyan);
  background: #22d3ee12;
  border-radius: 0 8px 8px 0;
  color: #c6d9de;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4em 0;
  font-size: .93rem;
}
.prose th, .prose td { padding: 9px 13px; border: 1px solid var(--border); text-align: left; }
.prose th { background: var(--surface-2); font-weight: 600; color: var(--amber-soft); }

.prose :not(pre) > code {
  padding: .15em .4em;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: #2317334d;
  color: #e0bcff;
  font-family: var(--font-mono);
  font-size: .88em;
}

.table-wrap, .prose table { overflow-x: auto; display: block; }

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 56px;
  max-width: 780px;
}
.post-nav-link {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color .15s;
}
.post-nav-link:hover { border-color: var(--cyan); }
.post-nav-link.next { text-align: right; }
.post-nav-label { display: block; font-size: .78rem; color: var(--cyan-soft); font-family: var(--font-mono); }
.post-nav-title { display: block; margin-top: 3px; color: var(--text); font-weight: 550; }



.tag-section { margin-bottom: 44px; }
.tag-section h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--chip, var(--accent-soft));
}
.tag-count {
  padding: 1px 9px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: .75rem;
  font-family: var(--font-mono);
  font-weight: 500;
}
.tag-cloud { margin-bottom: 40px; }



.code-wrap { position: relative; }

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 5px 11px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: #1c1329ee;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: .74rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s, color .15s, border-color .15s;
}
.code-wrap:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--cyan-soft); border-color: var(--cyan); }
.copy-btn.is-done { color: var(--emerald); border-color: var(--emerald); opacity: 1; }



@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .sidebar {
    transform: translateX(-100%);
    transition: transform .22s ease;
  }
  body.nav-open .sidebar { transform: none; }
  .nav-scrim { display: none; }
  body.nav-open .nav-scrim { display: block; }
  .content { margin-left: 0; padding: 76px 20px 72px; }
  .post-title { font-size: 1.8rem; }
  .page-title { font-size: 1.7rem; }
  .post-nav { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}