:root {
  --theme: #0b0f17;
  --entry: #131a26;
  --primary: #eef1f6;
  --secondary: #8a97ab;
  --tertiary: #33445c;
  --content: #ccd4e0;
  --code-block-bg: #090d14;
  --code-bg: #161d29;
  --border: #263349;
  --accent-cyan: #4c8dfa;
  --accent-soft: #7fb0ff;
  --glow: 76, 141, 250;
  --glow-soft: 127, 176, 255;
  --surface: rgba(19, 26, 38, 0.86);
  --surface-strong: rgba(11, 15, 23, 0.92);
  --glow-blend: screen;
  color-scheme: dark;
}

:root[data-theme="dark"] {
  --theme: #0b0f17;
  --entry: #131a26;
  --primary: #eef1f6;
  --secondary: #8a97ab;
  --tertiary: #33445c;
  --content: #ccd4e0;
  --code-block-bg: #090d14;
  --code-bg: #161d29;
  --border: #263349;
  --accent-cyan: #4c8dfa;
  --accent-soft: #7fb0ff;
  --glow: 76, 141, 250;
  --glow-soft: 127, 176, 255;
  --surface: rgba(19, 26, 38, 0.86);
  --surface-strong: rgba(11, 15, 23, 0.92);
  --glow-blend: screen;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --theme: #f4f6fa;
  --entry: #ffffff;
  --primary: #131a26;
  --secondary: #55627a;
  --tertiary: #dbe1ea;
  --content: #1c2536;
  --code-block-bg: #131a26;
  --code-bg: #eef1f6;
  --border: #dbe1ea;
  --accent-cyan: #2f6fe0;
  --accent-soft: #4c8dfa;
  --glow: 47, 111, 224;
  --glow-soft: 76, 141, 250;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --glow-blend: normal;
  color-scheme: light;
}

html,
body {
  background: var(--theme);
}

body {
  position: relative;
  isolation: isolate;
  min-height: 100vh;
  overflow-x: hidden;
  background-image: linear-gradient(rgba(var(--glow), 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--glow), 0.06) 1px, transparent 1px),
    repeating-linear-gradient(135deg, transparent 0, transparent 5.8rem, rgba(var(--glow), 0.025) 5.85rem, transparent 5.9rem);
  background-size: 3.5rem 3.5rem, 3.5rem 3.5rem, 14rem 14rem;
  animation: site-grid-drift 42s linear infinite;
}

body::before,
body::after {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  content: "";
}

body > * {
  position: relative;
  z-index: 1;
}

.cursor-glow {
  position: fixed;
  top: -3.5rem;
  left: -3.5rem;
  z-index: 5;
  width: 7rem;
  height: 7rem;
  border: none;
  outline: none;
  box-shadow: none;
  border-radius: 50%;
  background: radial-gradient(closest-side circle,
    rgba(var(--glow), 0.26),
    rgba(var(--glow), 0.10) 45%,
    rgba(var(--glow), 0) 78%);
  filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  will-change: transform, opacity;
  mix-blend-mode: var(--glow-blend, normal);
  transform: translate3d(-1000px, -1000px, 0);
  transition: opacity 240ms ease, transform 140ms cubic-bezier(0.22, 1, 0.36, 1);
}

.cursor-glow.is-visible {
  opacity: 0.85;
}

body::before {
  background: radial-gradient(circle at var(--pointer-x, 50%) var(--pointer-y, 35%), rgba(var(--glow), 0.13), transparent 4rem),
    repeating-linear-gradient(
    180deg,
    transparent 0,
    transparent 0.35rem,
    rgba(var(--glow), 0.018) 0.4rem,
    transparent 0.45rem
  );
  background-size: 100% 0.8rem;
  animation: scanline-drift 18s linear infinite;
}

body::after {
  border: 1px solid rgba(var(--glow), 0.22);
  background: radial-gradient(circle at var(--pointer-x, 50%) var(--pointer-y, 35%), rgba(var(--glow), 0.16), transparent 4rem),
    radial-gradient(ellipse at 0% 18%, rgba(var(--glow), 0.1), transparent 32%),
    radial-gradient(ellipse at 100% 82%, rgba(var(--glow-soft), 0.08), transparent 34%);
  opacity: 0.75;
  transition: background 120ms ease-out;
}

.header {
  position: relative;
  z-index: 2;
  border-bottom: 1px solid rgba(var(--glow), 0.2);
  background: var(--surface-strong);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.12);
}

.header::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  content: "";
  opacity: 0.55;
}

.logo a,
.menu a {
  color: var(--primary);
}

.logo a {
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.logo a::before {
  color: var(--accent-soft);
  content: "$ ";
}

.menu a {
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.menu a:hover,
.menu .active,
a:hover {
  color: var(--accent-soft);
}

.main {
  position: relative;
}

.reading-progress {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 10;
  height: 2px;
  background: rgba(var(--glow), 0.12);
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-soft));
  box-shadow: 0 0 0.5rem rgba(var(--glow), 0.65);
  transition: width 100ms linear;
}

.page-header,
.post-single,
.post-entry,
.first-entry {
  position: relative;
}

.page-header h1,
.entry-header h1,
.entry-header h2,
.post-title {
  color: var(--primary);
  letter-spacing: 0;
}

.page-header h1::before,
.post-title::before {
  margin-right: 0.5rem;
  color: var(--accent-soft);
  content: ">";
  font-family: "Cascadia Code", "Consolas", monospace;
}

.page-header h1::after,
.post-title::after {
  display: block;
  width: 4rem;
  height: 2px;
  margin-top: 0.8rem;
  background: var(--accent-soft);
  content: "";
}

.page-header .post-description {
  max-width: 42rem;
  color: var(--secondary);
}

.post-entry {
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  box-shadow: 0 0.75rem 2rem rgba(0, 0, 0, 0.12);
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.post-entry:hover,
.post-entry:focus-within {
  border-color: var(--accent-cyan);
  box-shadow: 0 1rem 2.5rem rgba(0, 0, 0, 0.22);
  transform: translateY(-2px);
}

.writeup-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.writeup-badges span {
  padding: 0.2rem 0.45rem;
  border: 1px solid rgba(var(--glow), 0.28);
  border-radius: 3px;
  background: rgba(var(--glow), 0.08);
  color: var(--accent-cyan);
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.post-content {
  color: var(--content);
}

.entry-content a {
  color: var(--accent-cyan);
  text-decoration-color: rgba(var(--glow), 0.4);
}

.post-content a:hover,
.entry-content a:hover {
  color: var(--accent-soft);
}

.post-content blockquote {
  border-inline-start-color: var(--accent-soft);
  background: rgba(var(--glow-soft), 0.08);
}

.writeup-hint {
  align-items: flex-start;
  gap: 0.65rem;
  margin: 1.25rem 0;
  padding: 0.8rem 1rem;
  border: 1px solid rgba(var(--glow), 0.24);
  border-inline-start: 3px solid var(--accent-soft);
  border-radius: 3px;
  background: linear-gradient(90deg, rgba(var(--glow-soft), 0.12), var(--surface));
  color: var(--secondary);
  font-size: 0.95rem;
  line-height: 1.55;
}

.writeup-hint__icon {
  flex: 0 0 auto;
  width: 1.35rem;
  margin-top: 0.02rem;
  font-size: 1.1rem;
  line-height: 1.55;
  text-align: center;
}

.writeup-hint__content {
  min-width: 0;
}

.writeup-hint strong {
  color: var(--accent-soft);
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.post-content code,
.entry-content code {
  border: 0;
  background: transparent;
  color: var(--accent-cyan);
}

.post-content pre {
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: 0 0.75rem 2rem rgba(0, 0, 0, 0.16);
}

.writeup-main .highlight {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(var(--glow), 0.26);
  border-radius: 8px;
  background: #0b1118;
  box-shadow: 0 0.9rem 2rem rgba(0, 0, 0, 0.22), 0 0 0 1px rgba(var(--glow), 0.05);
}

.writeup-status {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.writeup-status span {
  padding: 0.35rem 0.55rem;
  border: 1px solid rgba(var(--glow), 0.26);
  border-radius: 3px;
  background: var(--surface);
  color: var(--primary);
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.72rem;
}

.writeup-status b {
  margin-right: 0.4rem;
  color: var(--accent-cyan);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.writeup-main .post-content > * {
  animation: content-reveal 450ms ease both;
}

.home-info {
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
  border: 1px solid rgba(var(--glow), 0.24);
  border-radius: 3px;
  background: linear-gradient(135deg, var(--surface), var(--surface-strong));
  box-shadow: 0 1.5rem 3rem rgba(0, 0, 0, 0.16);
}

.home-info::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: linear-gradient(var(--accent-cyan), transparent);
  content: "";
}

.home-signal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.25rem 0 0.5rem;
}

.home-signal span {
  padding: 0.3rem 0.5rem;
  border: 1px solid rgba(var(--glow), 0.2);
  background: rgba(var(--glow), 0.05);
  color: var(--secondary);
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.67rem;
}

.home-signal b {
  margin-right: 0.3rem;
  color: var(--accent-cyan);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
}

@keyframes content-reveal {
  from { opacity: 0; transform: translateY(0.35rem); }
  to { opacity: 1; transform: translateY(0); }
}

.writeup-main .highlight::before {
  display: block;
  padding: 0.42rem 0.75rem 0.42rem 3.75rem;
  border-bottom: 1px solid rgba(var(--glow), 0.16);
  background: #182431;
  color: var(--accent-cyan);
  content: "$ terminal / " attr(data-language);
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
}

.writeup-main .highlight::after {
  position: absolute;
  top: 0.56rem;
  left: 0.95rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: #5c7684;
  box-shadow: 0.72rem 0 0 #83a4b2, 1.44rem 0 0 rgba(var(--glow), 0.9);
  content: "";
}

.writeup-main .highlight .lntable {
  width: 100%;
  margin: 0;
  border-spacing: 0;
  border: 0 !important;
  border-radius: 0;
  table-layout: fixed;
}

.writeup-main .highlight .lntable tr,
.writeup-main .highlight .lntable td {
  border: 0 !important;
  box-shadow: none;
}

.writeup-main .highlight .lntd:first-child {
  width: 2.8rem;
  padding: 0.35rem 0.35rem;
  border: 0;
  background: transparent;
  text-align: center;
  vertical-align: top;
}

.writeup-main .highlight .lntd:first-child pre {
  padding: 0;
  margin: 0;
  border: 0 !important;
  outline: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  color: #6f8494;
  font-size: 0.82rem;
  line-height: 1.35rem !important;
  text-align: center;
}

.writeup-main .highlight .lntd:first-child,
.writeup-main .highlight .lntd:first-child * {
  border: 0 !important;
  outline: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

.writeup-main .highlight .lnt {
  display: block;
  margin: 0;
  padding: 0;
  color: #6f8494;
  font-size: 0.82rem;
  line-height: 1.35rem !important;
  text-align: center;
  user-select: none;
}

.writeup-main .highlight .line {
  display: block;
  min-height: 0;
  line-height: 1.35rem !important;
}

.writeup-main .highlight .lntd:last-child {
  width: 100%;
  max-width: none;
  padding: 0.35rem 1rem;
  overflow-x: auto;
  vertical-align: top;
}

.writeup-main .highlight .lntd:last-child pre {
  padding: 0;
  margin: 0;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  line-height: 1.35rem !important;
}

.writeup-main .highlight code {
  display: block;
  font-size: 0.82rem;
  line-height: 1.35rem !important;
}

.writeup-main .copy-code {
  top: 0.28rem;
  right: 0.5rem;
  display: none;
  border: 1px solid rgba(var(--glow), 0.32);
  border-radius: 2px;
  background: #101b26;
  color: var(--accent-cyan);
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.65rem;
}

.writeup-main .highlight:hover .copy-code,
.writeup-main .highlight:focus-within .copy-code {
  display: block;
}

.writeup-main .highlight pre {
  margin: 0;
  border: 0;
  border-radius: 0;
}

details.toc {
  position: sticky;
  top: 5rem;
  z-index: 1;
  float: left;
  width: 12rem;
  max-height: calc(100vh - 7rem);
  margin: 0 2rem 1.5rem 0;
  overflow: auto;
  border: 1px solid var(--border);
  border-inline-start: 2px solid var(--accent-cyan);
  border-radius: 4px;
  background: var(--surface-strong);
  box-shadow: 0 0.75rem 2rem rgba(0, 0, 0, 0.16);
  scrollbar-width: thin;
  scrollbar-color: var(--tertiary) transparent;
}

details.toc summary {
  padding: 0.7rem 0.85rem;
  color: var(--accent-soft);
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

details.toc .inner {
  padding: 0 0.85rem 0.8rem;
}

details.toc ul {
  margin: 0;
  padding-inline-start: 1rem;
}

details.toc li {
  margin: 0.35rem 0;
}

details.toc a {
  color: var(--secondary);
  font-size: 0.78rem;
  line-height: 1.35;
  text-decoration: none;
}

details.toc a:hover {
  color: var(--accent-cyan);
}

.post-content h2,
.post-content h3 {
  color: var(--primary);
}

.post-content h2::before,
.post-content h3::before {
  margin-right: 0.45rem;
  color: var(--accent-cyan);
  content: "//";
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.72em;
}

.post-content {
  max-width: 100%;
}

.footer {
  border-top: 1px solid rgba(var(--glow), 0.2);
  color: var(--secondary);
}

.footer a {
  color: var(--accent-cyan);
}

.theme-toggle:hover {
  color: var(--accent-soft);
}

@keyframes site-grid-drift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 3.5rem 3.5rem, 3.5rem 3.5rem, 7rem 7rem; }
}

@keyframes scanline-drift {
  from { transform: translateY(-0.8rem); }
  to { transform: translateY(0.8rem); }
}

@media (prefers-reduced-motion: reduce) {
  body {
    animation: none;
  }

  body::before {
    animation: none;
  }

  body::after {
    transition: none;
  }

  .writeup-main .post-content > * {
    animation: none;
  }

}

@media (max-width: 640px) {
  .logo a {
    font-size: 0.9rem;
  }

  .menu {
    column-gap: 1rem;
  }

  details.toc {
    position: relative;
    top: auto;
    float: none;
    width: auto;
    max-height: 16rem;
    margin: 1.5rem 0;
  }
}

.main:has(.writeup-layout) {
  max-width: 76rem;
}

.writeup-layout {
  display: block;
}

.writeup-sidebar {
  position: fixed;
  top: 5rem;
  left: max(1rem, calc((100vw - 76rem) / 2));
  width: 18rem;
  max-height: calc(100vh - 7rem);
  overflow: auto;
  z-index: 2;
  scrollbar-width: thin;
  scrollbar-color: var(--tertiary) transparent;
}

.writeup-sidebar details.toc {
  position: static;
  float: none;
  width: auto;
  max-height: calc(100vh - 7rem);
  margin: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.writeup-toc-title {
  margin: 0 0 1rem;
  color: var(--primary);
  font-size: 1rem;
  font-weight: 600;
}

.writeup-sidebar details.toc summary {
  display: none;
}

.writeup-sidebar .inner {
  overflow-wrap: anywhere;
}

.writeup-sidebar .inner ul,
.writeup-sidebar .inner li {
  list-style: none;
}

.writeup-sidebar .inner ul {
  margin: 0;
  padding-inline-start: 0;
}

.writeup-sidebar .inner ul ul {
  padding-inline-start: 0.8rem;
}

.writeup-sidebar .inner li > ul {
  display: none;
}

.writeup-sidebar .inner li.is-expanded > ul {
  display: block;
}

.writeup-sidebar .inner li {
  margin: 0.1rem 0;
}

.writeup-sidebar .inner a {
  display: block;
  color: var(--secondary);
  font-size: 0.78rem;
  line-height: 1.3;
  text-decoration: none;
}

.writeup-sidebar .inner a:hover,
.writeup-sidebar .inner a:focus-visible {
  color: var(--accent-soft);
}

.writeup-sidebar .inner a.is-current {
  color: var(--accent-cyan);
  font-weight: 600;
}

.writeup-main {
  min-width: 0;
  margin-left: 20rem;
}

.writeup-main .post-header {
  margin-top: 0;
}

@media (max-width: 1100px) {
  .main:has(.writeup-layout) {
    max-width: calc(var(--main-width) + var(--gap) * 2);
  }

  .writeup-layout {
    display: block;
  }

  .writeup-sidebar {
    position: static;
    width: auto;
    max-height: none;
    margin-bottom: 1rem;
  }

  .writeup-sidebar details.toc {
    max-height: 16rem;
    margin: 0 0 1rem;
  }

  .writeup-main {
    margin-left: 0;
  }
}

/* Locked / active write-ups */
.writeup-layout.is-locked .writeup-main {
  margin-left: 0;
}

.writeup-locked {
  margin-top: 2rem;
  padding: 2.5rem 1.75rem;
  border: 1px solid rgba(var(--glow), 0.26);
  border-radius: 6px;
  background: rgba(var(--glow-soft), 0.06);
  text-align: center;
}

.writeup-locked-icon {
  color: var(--accent-cyan);
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
}

.writeup-locked h2 {
  margin: 0.75rem 0 0.5rem;
  color: var(--primary);
}

.writeup-locked h2::before {
  content: none;
}

.writeup-locked p {
  max-width: 44ch;
  margin: 0.4rem auto;
  color: var(--content);
  font-size: 0.92rem;
}

.writeup-badges span.badge-locked {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}