/*
  Shared styles for the updates subsite:
  - updates/index.html (Signal log listing + subscribe)
  - updates/*.html (individual update posts)
  Design tokens and chrome align with the main site (index.html).
*/

:root {
  --bg-deep: #030a14;
  --bg-mid: #0a1a2e;
  --bg-card: #0f2035;
  --accent-dark: #004d40;
  --accent-mid: #00838f;
  --accent-bright: #00acc1;
  --accent-light: #26c6da;
  --data-cyan: #80deea;
  --accent-glow: #00e5ff;
  --text-primary: #e0f0f0;
  --text-secondary: #8fa8a0;
  --text-muted: #4a6058;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-cond: 'IBM Plex Sans Condensed', sans-serif;
  --font-sans: 'IBM Plex Sans', sans-serif;
  --radius: 2px;
  --nav-height: 60px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.7;
  overflow-x: hidden;
}
img, object { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-height);
  background: rgba(3, 10, 20, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 131, 143, 0.15);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 48px);
}
.nav-logo {
  font-family: var(--font-cond); font-weight: 700;
  font-size: 14px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-primary);
  display: flex; align-items: center; gap: 10px;
}
.nav-logo-img { width: 28px; height: 28px; object-fit: contain; display: block; }
.nav-right { display: flex; align-items: center; gap: clamp(20px, 3vw, 40px); }
.nav-links { display: flex; align-items: center; gap: clamp(16px, 2.5vw, 32px); list-style: none; }
.nav-links a {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-secondary); transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-cta {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--accent-mid); color: var(--text-primary);
  padding: 10px 20px; border-radius: var(--radius);
  transition: background 0.2s;
}
.nav-cta:hover { background: var(--accent-bright); }

.article-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: calc(var(--nav-height) + 48px) clamp(20px, 5vw, 32px) 64px;
}
.back-link {
  display: inline-block;
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 28px;
  transition: color 0.2s;
}
.back-link:hover { color: var(--accent-light); }

.article-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  margin-bottom: 18px;
}
.article-date {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-muted);
}
.article-tag {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 3px 10px; border-radius: var(--radius);
  border: 1px solid rgba(0, 172, 193, 0.35);
  color: var(--accent-light);
}
.article-tag.release  { color: var(--accent-light); border-color: rgba(0, 172, 193, 0.35); }
.article-tag.field    { color: #f5d67a; border-color: rgba(245, 214, 122, 0.3); }
.article-tag.research { color: var(--data-cyan); border-color: rgba(128, 222, 234, 0.3); }
.article-tag.press    { color: #e0a8f5; border-color: rgba(224, 168, 245, 0.3); }

.article-title {
  font-family: var(--font-cond); font-weight: 700;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.1; letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(0, 131, 143, 0.2);
}

.article-body { color: var(--text-primary); }
.article-body p { margin-bottom: 20px; color: var(--text-secondary); }
.article-body h2 {
  font-family: var(--font-cond); font-weight: 600;
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--text-primary);
  margin: 40px 0 14px;
  letter-spacing: -0.01em;
}
.article-body h3 {
  font-family: var(--font-cond); font-weight: 600;
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--text-primary);
  margin: 28px 0 10px;
}
.article-body a {
  color: var(--accent-light);
  border-bottom: 1px solid rgba(38, 198, 218, 0.3);
  transition: color 0.2s, border-color 0.2s;
}
.article-body a:hover { color: var(--accent-glow); border-color: var(--accent-glow); }
.article-body ul, .article-body ol { margin: 0 0 20px 24px; color: var(--text-secondary); }
.article-body li { margin-bottom: 8px; }
.article-body blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 2px solid var(--accent-mid);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-style: italic;
}
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: var(--radius);
  color: var(--data-cyan);
}
.article-body pre {
  background: var(--bg-card);
  border: 1px solid rgba(0, 131, 143, 0.2);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  margin: 20px 0;
}
.article-body pre code { background: transparent; padding: 0; }
.article-body img {
  border-radius: var(--radius);
  border: 1px solid rgba(0, 131, 143, 0.2);
  margin: 24px 0;
}
.article-body figure { margin: 24px 0; }
.article-body figcaption {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-top: 8px;
  text-align: center;
}

.article-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(0, 131, 143, 0.2);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px;
}
.article-footer a {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.article-footer a:hover { color: var(--accent-light); }

/* Optional article components (press releases, long-form) */
.article-lede {
  font-family: var(--font-cond);
  font-weight: 400;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.5;
  color: var(--text-secondary);
  margin: -16px 0 24px;
}
.article-dateline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 28px;
}
.article-byline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 32px;
}
.article-figure-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  font-style: italic;
  border-left: 2px solid var(--accent-mid);
  padding: 10px 16px;
  background: var(--bg-card);
  margin: 24px 0;
}
.article-author-bio {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px dashed rgba(0, 131, 143, 0.2);
  font-size: 14px;
  color: var(--text-muted);
  font-style: italic;
}
.pull-quote {
  margin: 28px 0;
  padding: 20px 24px;
  border-left: 2px solid var(--accent-mid);
  background: var(--bg-card);
}
.pull-quote p {
  font-family: var(--font-cond);
  font-weight: 400;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.55;
  color: var(--text-primary);
  font-style: italic;
  margin-bottom: 12px;
}
.pull-quote cite {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-light);
  font-style: normal;
}
.about-block {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed rgba(0, 131, 143, 0.2);
}
.about-block h3 {
  font-family: var(--font-cond);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.about-block p {
  font-size: 14px;
  color: var(--text-muted);
}
.end-mark {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  margin: 40px 0 8px;
}

footer {
  background: var(--bg-deep);
  color: var(--text-secondary);
  padding: 40px clamp(24px, 5vw, 80px);
  border-top: 1px solid rgba(0, 131, 143, 0.12);
  display: flex; flex-wrap: wrap;
  justify-content: space-between; align-items: center;
  gap: 24px;
}
.footer-brand {
  font-family: var(--font-cond); font-weight: 700;
  font-size: 13px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-primary);
}
.footer-links { display: flex; flex-wrap: wrap; gap: 20px 24px; }
.footer-links a {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-muted); transition: color 0.2s;
}
.footer-links a:hover { color: var(--text-secondary); }
.footer-legal {
  font-family: var(--font-mono); font-size: 9px;
  letter-spacing: 0.08em; color: var(--text-muted);
  text-transform: uppercase;
}
.footer-legal a { color: var(--text-muted); }
.footer-legal a:hover { color: var(--text-secondary); }

/* ── Updates hub: page hero (Signal log) ── */
.page-hero {
  min-height: 48vh;
  background: var(--bg-deep);
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(32px, 5vw, 64px);
  padding: calc(var(--nav-height) + 40px) clamp(24px, 5vw, 80px) 48px;
  position: relative;
  overflow: hidden;
}
.page-hero .hero-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--accent-mid) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.07;
  mask-image: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.2) 100%);
}
.page-hero .hero-lines {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 50%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 38px,
    rgba(0, 131, 143, 0.06) 38px,
    rgba(0, 131, 143, 0.06) 39px
  );
  opacity: 0.6;
}
.page-hero-content { position: relative; z-index: 1; }
.page-hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 16px;
}
.page-hero-headline {
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: clamp(32px, 4.5vw, 52px);
  line-height: 0.95;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.page-hero-sub {
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--text-secondary);
  max-width: 440px;
  margin-top: 20px;
  line-height: 1.7;
  font-weight: 300;
}
.page-hero-visual {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-hero-visual .svg-embed {
  width: 100%;
  max-width: 340px;
  height: auto;
  aspect-ratio: 1;
}

.updates-section {
  padding: clamp(48px, 8vw, 80px) clamp(24px, 5vw, 80px);
  background: var(--bg-mid);
  position: relative;
  overflow: hidden;
}
.updates-inner {
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.updates-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(0, 131, 143, 0.15);
}
.filter-chip {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid rgba(0, 131, 143, 0.3);
  border-radius: var(--radius);
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.2s;
}
.filter-chip:hover { color: var(--text-primary); border-color: var(--accent-mid); }
.filter-chip.active {
  background: var(--accent-mid);
  color: var(--text-primary);
  border-color: var(--accent-mid);
}

.updates-timeline {
  position: relative;
  padding-left: 32px;
}
.updates-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(
    180deg,
    rgba(0, 131, 143, 0.4) 0%,
    rgba(0, 131, 143, 0.15) 100%
  );
}

.update-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid rgba(0, 131, 143, 0.2);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 24px;
  transition: border-color 0.2s, transform 0.2s;
}
.update-card:hover {
  border-color: var(--accent-mid);
  transform: translateX(2px);
}
.update-card::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 28px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--accent-mid);
  box-shadow: 0 0 0 3px var(--bg-mid), 0 0 12px rgba(0, 229, 255, 0.3);
}
.update-card.pinned::before {
  background: var(--accent-glow);
  border-color: var(--accent-glow);
}

.update-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.update-date {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.update-tag {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-light);
  padding: 3px 8px;
  border: 1px solid rgba(0, 172, 193, 0.35);
  border-radius: var(--radius);
}
.update-tag.release { color: var(--accent-light); border-color: rgba(0, 172, 193, 0.35); }
.update-tag.field { color: #f5d67a; border-color: rgba(245, 214, 122, 0.3); }
.update-tag.research { color: var(--data-cyan); border-color: rgba(128, 222, 234, 0.3); }
.update-tag.press { color: #e0a8f5; border-color: rgba(224, 168, 245, 0.3); }

.update-title {
  font-family: var(--font-cond);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.update-body {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.65;
}
.update-body p + p { margin-top: 12px; }
.update-link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  border-bottom: 1px solid rgba(38, 198, 218, 0.3);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.update-link:hover { color: var(--accent-glow); border-color: var(--accent-glow); }

.updates-empty {
  text-align: center;
  padding: 48px 0;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.updates-status {
  text-align: center;
  padding: 32px 0 16px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.updates-status-error {
  color: #e57373;
}

.subscribe-section {
  padding: clamp(40px, 6vw, 64px) clamp(24px, 5vw, 80px);
  background: var(--bg-deep);
  border-top: 1px solid rgba(0, 131, 143, 0.12);
}
.subscribe-inner {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}
.subscribe-headline {
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--text-primary);
  margin-bottom: 10px;
}
.subscribe-sub {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.subscribe-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 440px;
  margin: 0 auto;
  text-align: left;
}
.subscribe-form-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}
.subscribe-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.subscribe-form input[type="email"] {
  flex: 1;
  min-width: 0;
  background: var(--bg-card);
  border: 1px solid rgba(0, 131, 143, 0.25);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 10px 12px;
}
.subscribe-form input[type="email"]:focus {
  outline: none;
  border-color: var(--accent-mid);
}
.subscribe-form input[type="submit"] {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--accent-mid);
  color: var(--text-primary);
  padding: 10px 20px;
  border-radius: var(--radius);
  cursor: pointer;
  border: none;
  transition: background 0.2s;
}
.subscribe-form input[type="submit"]:hover {
  background: var(--accent-bright);
}
.subscribe-powered {
  margin: 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
}
.subscribe-powered a {
  color: var(--text-muted);
  border-bottom: 1px solid rgba(0, 131, 143, 0.2);
  transition: color 0.2s, border-color 0.2s;
}
.subscribe-powered a:hover {
  color: var(--text-secondary);
  border-color: var(--accent-mid);
}

/* Buttondown POST target: response loads here so the main page does not navigate */
.subscribe-target-frame {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.subscribe-success {
  margin-top: 16px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-light);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav { padding-left: 16px; padding-right: 16px; }
  footer { flex-direction: column; align-items: flex-start; padding: 32px 20px; }

  .page-hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding: calc(var(--nav-height) + 24px) 20px 48px;
  }
  .page-hero-sub { margin-left: auto; margin-right: auto; }
  .page-hero-visual { order: 2; }
  .updates-section,
  .subscribe-section { padding-left: 20px; padding-right: 20px; }
  .updates-timeline { padding-left: 24px; }
  .update-card::before { left: -24px; width: 13px; height: 13px; }
  .subscribe-form-row { flex-direction: column; }
}