:root {
  color-scheme: light;

  --bg: #f6f8fc;
  --surface: #ffffff;
  --surface-soft: #f9fbff;
  --ink: #111827;
  --ink-soft: #374151;
  --muted: #64748b;
  --line: #dde4ef;
  --accent: #008073;
  --accent-soft: #e8f6f3;
  --focus: #008073;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;

  --radius-sm: 0.5rem;
  --radius-md: 0.85rem;
  --radius-lg: 1.2rem;

  --step--1: clamp(0.84rem, 0.82rem + 0.1vw, 0.92rem);
  --step-0: clamp(0.98rem, 0.95rem + 0.2vw, 1.08rem);
  --step-1: clamp(1.18rem, 1.08rem + 0.45vw, 1.38rem);
  --step-2: clamp(1.5rem, 1.26rem + 1vw, 2rem);
  --step-3: clamp(2rem, 1.62rem + 1.7vw, 2.8rem);

  --shadow-1: 0 10px 24px rgba(17, 24, 39, 0.06);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Sora", "Segoe UI", sans-serif;
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
}

.wrap {
  width: min(1040px, 94vw);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  top: -120px;
  left: var(--space-3);
  background: var(--surface);
  border: 2px solid var(--focus);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.7rem;
  text-decoration: none;
  z-index: 999;
}

.skip-link:focus-visible {
  top: var(--space-3);
}

.site-bg-grid,
.site-bg-blob {
  display: none;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: var(--space-5) 0 var(--space-4);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  font-size: var(--step-1);
  font-weight: 700;
  color: var(--ink);
}

.brand-icon {
  width: 34px;
  height: 34px;
  display: block;
}

.tagline {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: var(--step--1);
  max-width: 58ch;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.site-nav a,
.nav-dropdown-toggle {
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink-soft);
  text-decoration: none;
  font: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  padding: 0.3rem 0.5rem;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease;
}

.site-nav a:hover,
.nav-dropdown-toggle:hover {
  color: var(--accent);
  border-color: #cae8e2;
  background: var(--accent-soft);
}

.site-nav a:focus-visible,
.nav-dropdown-toggle:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
.read-more:focus-visible,
.post-toc a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.45rem);
  list-style: none;
  margin: 0;
  padding: 0.25rem 0;
  min-width: 200px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: 0 8px 18px rgba(17, 24, 39, 0.06);
  opacity: 0;
  pointer-events: none;
  transform: translateY(5px);
  transition: opacity 160ms ease, transform 160ms ease;
  z-index: 40;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-dropdown-menu li a {
  display: block;
  padding: 0.55rem 0.8rem;
}

.site-main {
  margin-bottom: var(--space-7);
  margin-top: var(--space-4);
}

.site-main-home,
.site-main-default {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(0.9rem, 0.85rem + 0.8vw, 1.45rem);
}

.site-main-post {
  background: transparent;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
}

.home-hero {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: var(--space-3);
  align-items: center;
}

.home-hero-copy {
  display: grid;
  gap: var(--space-3);
}

.home-hero h1 {
  margin: 0;
  font-size: clamp(1.55rem, 1.35rem + 0.9vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.home-hero p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.94rem;
  max-width: 54ch;
}

.home-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.button {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid var(--line);
  padding: 0.34rem 0.66rem;
  font-size: 0.8rem;
  font-weight: 700;
}

.button-primary {
  color: #ffffff;
  border-color: var(--accent);
  background: var(--accent);
}

.button-ghost {
  color: var(--ink-soft);
  background: var(--surface);
}

.home-hero-art {
  border: 1px solid #d3dde9;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, #f9fbff 0%, #f3f7ff 100%);
  padding: 0.3rem;
  max-width: 340px;
  width: 100%;
  justify-self: end;
  box-shadow: 0 8px 18px rgba(17, 24, 39, 0.08);
  overflow: hidden;
}

.hero-schematic {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 0.6rem;
}

.pulse-stroke {
  stroke-dasharray: 16 10;
  animation: line-wave 12s linear infinite;
}

.flow-line {
  animation: line-wave 6.8s linear infinite;
}

.node {
  animation: node-blink 2.5s ease-in-out infinite;
}

.node-b {
  animation-delay: 220ms;
}

.node-c {
  animation-delay: 420ms;
}

.cmd-line {
  animation: cmd-fade 3.8s ease-in-out infinite;
}

.cmd-b {
  animation-delay: 700ms;
}

.angle-mark {
  opacity: 0.75;
  animation: glyph-breathe 4.2s ease-in-out infinite;
}

.signal-orb {
  animation: signal-run 3.2s linear infinite;
}

.featured-posts,
.category-discovery,
.posts-controls,
.posts-grid {
  margin-top: var(--space-5);
}

.section-head h2 {
  margin: 0.2rem 0 0;
  font-size: var(--step-1);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: var(--space-3);
}

.featured-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-soft);
}

.featured-card-link {
  display: grid;
  gap: 0.55rem;
  padding: var(--space-4);
  min-height: 100%;
  text-decoration: none;
}

.featured-media {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #f2f7f6;
  height: 150px;
}

.featured-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured-media-fallback {
  display: grid;
  place-items: center;
  height: 100%;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.featured-badge {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.7rem;
  height: 2.7rem;
  line-height: 1;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0;
  border-radius: 999px;
  border: 1px solid #b9ddd7;
  color: var(--accent);
  background: var(--accent-soft);
}

.featured-card h3 {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.35;
}

.featured-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--step--1);
}

.featured-meta {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 600;
}

.category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: var(--space-3);
}

.category-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.32rem 0.7rem;
  cursor: pointer;
}

.category-chip.is-active {
  border-color: #b9ddd7;
  background: var(--accent-soft);
  color: var(--accent);
}

.posts-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.65rem;
  align-items: end;
}

.control-group {
  display: grid;
  gap: 0.35rem;
  font-size: 0.84rem;
  color: var(--muted);
}

.control-group span {
  color: var(--ink-soft);
  font-weight: 700;
}

.control-group input,
.control-group select {
  min-height: 2.45rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  padding: 0.52rem 0.62rem;
  font: inherit;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 0.7rem;
}

.post-card {
  display: grid;
  gap: 0.65rem;
  align-content: start;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: var(--space-4);
  transition: border-color 180ms ease, transform 180ms ease;
}

.post-card:hover {
  border-color: #b9ddd7;
  transform: translateY(-2px);
}

.post-card.is-hidden {
  display: none;
}

.post-card-media {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.post-card-media img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.post-card-meta {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 600;
}

.post-card h2 {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.35;
}

.post-card h2 a {
  text-decoration: none;
}

.post-card h2 a:hover {
  color: var(--accent);
}

.post-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--step--1);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.16rem 0.42rem;
}

.read-more {
  justify-self: start;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.32rem 0.66rem;
  text-decoration: none;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
}

.read-more:hover {
  background: var(--accent-soft);
}

.posts-empty-state {
  margin-top: var(--space-4);
  color: var(--muted);
  font-weight: 600;
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(11, 116, 255, 0.1);
  z-index: 120;
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
}

.post-page {
  display: grid;
  gap: var(--space-5);
}

.post-hero {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(1rem, 0.9rem + 1vw, 1.8rem);
}

.post-signal {
  margin-bottom: 0.85rem;
}

.post-signal svg {
  width: 120px;
  height: 26px;
}

.signal-track {
  stroke: #bfded8;
  stroke-width: 2;
}

.signal-dot {
  fill: var(--accent);
  animation: signal-move 3.4s linear infinite;
}

.post-hero h1 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.9rem, 1.6rem + 1vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.post-meta-stack {
  margin-top: 0.8rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.post-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
}

.meta-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #aac1e5;
}

.post-cover {
  margin: 1rem 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.post-cover img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
}



.prose {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: clamp(1.4rem, 1.2rem + 1.5vw, 2.4rem);
  font-family: "IBM Plex Serif", "Georgia", serif;
  font-size: clamp(1.02rem, 1rem + 0.22vw, 1.14rem);
  color: #1a2435;
}

.prose > *:first-child {
  margin-top: 0;
}

.prose h2,
.prose h3,
.prose h4 {
  font-family: "Sora", "Segoe UI", sans-serif;
  color: #0f172a;
  line-height: 1.25;
  scroll-margin-top: 4.5rem;
}

.prose h2 {
  margin: 2em 0 0.6em;
  font-size: clamp(1.34rem, 1.22rem + 0.6vw, 1.7rem);
}

.prose h3 {
  margin: 1.6em 0 0.5em;
  font-size: clamp(1.14rem, 1.08rem + 0.35vw, 1.34rem);
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre {
  margin: 0 0 1.02em;
}

.prose ul,
.prose ol {
  padding-left: 1.28rem;
}

.prose a {
  color: var(--accent);
  text-underline-offset: 2px;
  text-decoration-thickness: 2px;
}

.prose blockquote {
  margin-left: 0;
  margin-right: 0;
  border-left: 3px solid #b8cdf0;
  background: #f8faff;
  padding: 0.72rem 0.9rem;
  color: #41506b;
}

.prose code {
  font-family: "JetBrains Mono", "SF Mono", monospace;
  font-size: 0.88em;
  border: 1px solid #d9e2f0;
  border-radius: 0.35rem;
  background: #f4f8ff;
  padding: 0.1rem 0.3rem;
}

.prose pre {
  overflow: auto;
  border: 1px solid #d9e2f0;
  border-radius: var(--radius-sm);
  background: #f7faff;
  padding: 0.8rem 0.9rem;
}

.prose pre code {
  border: 0;
  background: transparent;
  padding: 0;
}

.prose img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
  padding: var(--space-5) 0 var(--space-7);
}

.posts-grid .post-card {
  animation: rise 400ms ease both;
}

.posts-grid .post-card:nth-child(2) {
  animation-delay: 80ms;
}

.posts-grid .post-card:nth-child(3) {
  animation-delay: 150ms;
}

.posts-grid .post-card:nth-child(4) {
  animation-delay: 220ms;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes line-wave {
  from {
    stroke-dashoffset: 0;
  }

  to {
    stroke-dashoffset: -120;
  }
}

@keyframes node-blink {
  0%,
  100% {
    opacity: 0.65;
  }

  50% {
    opacity: 1;
  }
}

@keyframes cmd-fade {
  0%,
  100% {
    opacity: 0.45;
  }

  50% {
    opacity: 1;
  }
}

@keyframes glyph-breathe {
  0%,
  100% {
    opacity: 0.55;
  }

  50% {
    opacity: 0.95;
  }
}

@keyframes signal-run {
  0% {
    transform: translateX(0);
    opacity: 0.7;
  }

  70% {
    opacity: 1;
  }

  100% {
    transform: translateX(260px);
    opacity: 0.2;
  }
}

@keyframes signal-move {
  0% {
    cx: 20;
    opacity: 0.45;
  }

  45% {
    opacity: 1;
  }

  100% {
    cx: 100;
    opacity: 0.45;
  }
}

@media (max-width: 960px) {
  .home-hero {
    grid-template-columns: 1fr;
  }

  .home-hero-art {
    justify-self: start;
    max-width: 360px;
  }

  .featured-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
  }

  .site-nav {
    width: 100%;
  }

  .site-main-home,
  .site-main-default {
    padding: var(--space-4);
  }

  .home-hero-art {
    display: none;
  }

  .posts-controls {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}