*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0a0b;
  --bg-raised: #111113;
  --bg-subtle: #18181b;
  --border: #27272a;
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --accent: #3b82f6;
  --accent-dim: #1d4ed8;
  --mono: "SF Mono", "Cascadia Code", "Fira Code", "JetBrains Mono", Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 64px 0;
}

section + section {
  border-top: 1px solid var(--border);
}

/* --- Skip link (keyboard accessibility) --- */
.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  z-index: 1000;
  padding: 8px 12px;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 13px;
  text-decoration: none;
}

.skip-link:focus { top: 8px; }

/* --- Nav --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  padding-top: 8px;
  padding-bottom: 8px;
}

.logo {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo span { color: var(--text-muted); }

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  list-style: none;
  justify-content: flex-end;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

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

.nav-links a[aria-current="page"] { color: var(--text); }

/* --- Hero --- */
.hero {
  padding: 140px 0 64px;
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 16px;
  line-height: 1.7;
}


/* --- CTA button --- */
.cta-primary {
  display: inline-block;
  font-family: var(--mono);
  font-size: 14px;
  color: #fff;
  background: var(--accent);
  padding: 12px 28px;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.15s;
}

.cta-primary:hover { background: var(--accent-dim); }

/* --- Section headings --- */
.section-label {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}

section h2 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

/* --- Prose --- */
.prose {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 640px;
}

.prose p + p { margin-top: 20px; }

.prose strong {
  color: var(--text);
  font-weight: 600;
}

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

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

/* --- Timeline (story page) --- */
.timeline { margin-top: 32px; }

.timeline-item {
  position: relative;
  padding-left: 28px;
  padding-bottom: 28px;
  border-left: 2px solid var(--border);
}

.timeline-item:last-child {
  padding-bottom: 0;
  border-left-color: var(--accent);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 0;
  width: 10px;
  height: 10px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 50%;
}

.timeline-item:last-child::before {
  border-color: var(--accent);
  background: var(--accent);
}

.timeline-era {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 6px;
}

.timeline-text {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* --- Consequences list (story page) --- */
.consequences { margin-top: 28px; }

.consequence {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.consequence:last-child { border-bottom: none; }

.consequence h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.consequence p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- /about scoping (no separators between sections) --- */
body.about section + section { border-top: none; padding-top: 0; }
body.about .hero { border-bottom: none; padding-bottom: 32px; }
body.about .hero h1 { font-size: 30px; letter-spacing: -0.02em; margin-bottom: 20px; }

/* --- Pull-quote (homepage Platform teaser) --- */
p.pull-quote {
  font-size: 18px;
  line-height: 1.55;
  color: var(--text);
  padding-left: 22px;
  border-left: 3px solid var(--accent);
  max-width: 560px;
  margin: 4px 0 16px;
  font-weight: 400;
  letter-spacing: -0.01em;
}

p.pull-quote + p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 640px;
  margin-bottom: 16px;
}

/* --- Homepage-scoped tightening (intent-router must fit one viewport) --- */
body.home .hero { padding: 110px 0 36px; }
body.home .hero h1 { margin-bottom: 18px; }
body.home .hero p { margin-bottom: 12px; }
body.home .compact-block { padding: 32px 0; }
body.home .compact-block .lead-line { margin-bottom: 10px; }
body.home .product-line { padding: 4px 0; }
body.home .block-link { margin-top: 12px; }
body.home footer { padding: 24px 0; }

/* --- Homepage compact blocks (new) --- */
.compact-block { padding: 48px 0; }

.compact-block + .compact-block { border-top: 1px solid var(--border); }

.compact-block .lead-line {
  font-size: 15px;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 14px;
}

.product-line {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px 0;
}

.product-line a.name {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
  letter-spacing: -0.02em;
  min-width: 100px;
  flex-shrink: 0;
}

.product-line a.name:hover {
  text-decoration: underline;
}

.product-line .product-desc {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.status-pill {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.status-live { color: #10b981; }
.status-soon { color: var(--text-muted); }

.block-link {
  margin-top: 16px;
  font-size: 13px;
  font-family: var(--mono);
}

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

.block-link a:hover { text-decoration: underline; }

/* --- Module / project cards (platform page) --- */
.stack-intro {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.65;
  max-width: 640px;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.stack-essentials {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.stack-essentials .stack-item {
  width: 216px;
  flex-shrink: 0;
}

.stack-item {
  display: block;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  text-decoration: none;
  transition: border-color 0.15s;
}

a.stack-item:hover { border-color: var(--accent); }

.stack-item h2 {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.stack-item p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.stack-link {
  margin-top: 20px;
  font-size: 14px;
}

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

.stack-link a:hover { text-decoration: underline; }

/* --- Product cards (products page) --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.product-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px 26px 22px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s;
}

a.product-card:hover { border-color: var(--accent); }
a.product-card:hover .product-url { text-decoration: underline; }

.product-card .product-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.product-card h2 {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  letter-spacing: -0.01em;
}

.product-card .product-tagline {
  font-size: 15px;
  color: var(--text);
  line-height: 1.5;
  margin: 0;
}

.product-card .product-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0;
}

.product-card .product-meta {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--mono);
  margin: 0;
}

.product-card .product-meta strong { color: var(--text); }

.product-card .product-url {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  margin-top: auto;
  padding-top: 4px;
}

/* --- Code example block --- */
.code-example {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 24px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
  color: var(--text);
  white-space: pre;
  margin-top: 16px;
}

.code-example .c-keyword { color: #c084fc; }
.code-example .c-import  { color: #c084fc; }
.code-example .c-string  { color: #86efac; }
.code-example .c-comment { color: var(--text-muted); font-style: italic; }
.code-example .c-name    { color: #93c5fd; }
.code-example .c-deco    { color: #fbbf24; }
.code-example .c-builtin { color: #67e8f9; }

html.light-mode .code-example .c-keyword,
html.light-mode .code-example .c-import { color: #7c3aed; }
html.light-mode .code-example .c-string { color: #047857; }
html.light-mode .code-example .c-name    { color: #1d4ed8; }
html.light-mode .code-example .c-deco    { color: #b45309; }
html.light-mode .code-example .c-builtin { color: #0891b2; }

/* --- About text + link list --- */
.about-text {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 600px;
}

.about-text + .about-text { margin-top: 16px; }

.link-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--mono);
  font-size: 14px;
}

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

.link-list a:hover { text-decoration: underline; }

.link-list .label {
  color: var(--text-muted);
  margin-right: 8px;
}

/* --- CTA / contact section --- */
.cta-section {
  text-align: center;
  padding: 80px 0;
}

.cta-section h2 { margin-bottom: 16px; }

.cta-section p {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* --- Footer --- */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

footer a {
  color: var(--text-muted);
  text-decoration: none;
}

footer a:hover { color: var(--text); }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

/* --- Light mode --- */
html.light-mode {
  --bg: #ffffff;
  --bg-raised: #f4f4f5;
  --bg-subtle: #e4e4e7;
  --border: #d4d4d8;
  --text: #18181b;
  --text-muted: #52525b;
  --accent: #2563eb;
  --accent-dim: #1d4ed8;
}

html.light-mode nav { background: rgba(255, 255, 255, 0.85); }

html.light-mode .cta-primary { color: #fff; }

html.light-mode .status-live { color: #047857; }

/* --- Theme toggle --- */
.theme-toggle {
  position: fixed;
  top: 17px;
  right: 24px;
  z-index: 101;
  display: block;
  width: 40px;
  height: 22px;
  cursor: pointer;
}

.theme-toggle input { opacity: 0; width: 0; height: 0; }

.theme-toggle .slider {
  position: absolute;
  inset: 0;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 22px;
  transition: background 0.2s;
}

.theme-toggle .slider::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
}

.theme-toggle input:checked + .slider::before {
  transform: translateX(18px);
  background: var(--accent);
}

/* --- Blog index --- */
body.blog-index .hero { padding: 120px 0 48px; border-bottom: none; }
body.blog-index .hero h1 { font-size: 32px; margin-bottom: 12px; }
body.blog-index .hero p { font-size: 16px; color: var(--text-muted); }

.blog-list { padding: 32px 0 64px; }

.post-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  text-decoration: none;
  transition: border-color 0.15s;
}

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

.post-card img {
  width: 100%;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  background: var(--bg-subtle);
}

.post-card-content {
  padding: 20px;
}

.post-card time {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-card h2 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin: 10px 0 8px;
  line-height: 1.35;
}

.post-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}

/* --- Blog post --- */
body.blog-post .post-header { padding: 120px 0 40px; }

.post-header .post-date {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.post-header h1 {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.post-header .post-byline {
  font-size: 14px;
  color: var(--text-muted);
}

.post-content {
  padding: 32px 0 64px;
  border-top: 1px solid var(--border);
}

.post-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 40px 0 16px;
  letter-spacing: -0.01em;
}

.post-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 32px 0 12px;
}

.post-content p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
  max-width: 680px;
}

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

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

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

.post-content ul, .post-content ol {
  margin: 0 0 16px 24px;
  color: var(--text-muted);
  line-height: 1.75;
}

.post-content li { margin-bottom: 6px; }
.post-content li strong { color: var(--text); }

.post-content pre,
.post-content code {
  font-family: var(--mono);
  font-size: 14px;
}

.post-content code {
  background: var(--bg-subtle);
  padding: 2px 6px;
  border-radius: 4px;
}

.post-content pre {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 24px;
  overflow-x: auto;
  margin: 20px 0;
  line-height: 1.6;
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}

.post-content th, .post-content td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
}

.post-content th {
  background: var(--bg-raised);
  font-weight: 600;
  color: var(--text);
}

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

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 24px 0;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

/* --- Blog post specific elements --- */
.post-content blockquote {
  margin: 24px 0;
  padding: 0;
  border: none;
  background: none;
  font-style: normal;
}

.post-content blockquote p {
  margin: 0 0 12px;
  padding: 16px 20px;
  background: var(--bg-raised);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}

.post-content blockquote p:last-child {
  margin-bottom: 0;
}

.blog-example-meta {
  display: block;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-muted);
}

.blog-chart { display: block; }
.blog-chart-light { display: none; }
html.light-mode .blog-chart { display: none; }
html.light-mode .blog-chart-light { display: block; }

.blog-dark-only { display: block; }
.blog-light-only { display: none; }
html.light-mode .blog-dark-only { display: none; }
html.light-mode .blog-light-only { display: block; }

.blog-pos { color: #10b981; }
.blog-neg { color: #ef4444; }
html.light-mode .blog-pos { color: #047857; }
html.light-mode .blog-neg { color: #dc2626; }

/* --- Mobile --- */
@media (max-width: 600px) {
  section { padding: 48px 0; }
  .hero { padding: 110px 0 48px; }
  .compact-block { padding: 36px 0; }
  .cta-section { padding: 60px 0; }
  nav .container { padding-top: 10px; padding-bottom: 10px; flex-wrap: wrap; row-gap: 6px; }
  .nav-links { flex-basis: 100%; justify-content: center; gap: 6px 16px; }
  .nav-links a { font-size: 13px; }
  .product-line { flex-direction: column; gap: 6px; }
  .product-line a.name { min-width: 0; }
  .timeline-item { padding-left: 20px; }
  .theme-toggle { top: 14px; right: 16px; }
  .stack-essentials { flex-direction: column; }
  .stack-essentials .stack-item { width: auto; }
  .post-grid { grid-template-columns: 1fr; }
  .post-card-content { padding: 20px; }
  body.blog-post .post-header { padding: 100px 0 32px; }
  .post-content { padding: 24px 0 48px; }
}