/* ibm-plex-sans-regular - latin */
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  src: local('IBM Plex Sans'), local('IBMPlexSans'),
       url('/fonts/ibm-plex-sans-v6-latin-regular.woff2') format('woff2'),
       url('/fonts/ibm-plex-sans-v6-latin-regular.woff') format('woff');
}
/* ibm-plex-sans-600 - latin */
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 600;
  src: local('IBM Plex Sans SemiBold'), local('IBMPlexSans-SemiBold'),
       url('/fonts/ibm-plex-sans-v6-latin-600.woff2') format('woff2'),
       url('/fonts/ibm-plex-sans-v6-latin-600.woff') format('woff');
}
/* overpass-700italic - latin (header brand only) */
@font-face {
  font-family: 'Overpass';
  font-style: italic;
  font-weight: 500;
  src: url('/fonts/overpass-latin-500italic.woff2') format('woff2');
}
/* ibm-plex-mono-regular - latin */
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  src: local('IBM Plex Mono'), local('IBMPlexMono'),
       url('/fonts/ibm-plex-mono-v4-latin-regular.woff2') format('woff2'),
       url('/fonts/ibm-plex-mono-v4-latin-regular.woff') format('woff');
}

:root {
  --blue-900: #0a1929;
  --blue-800: #003b66;
  --blue-700: #004d80;
  --blue-600: #0065a3;
  --blue-500: #0079c1;
  --blue-400: #2196d4;
  --blue-300: #4db8e8;
  --blue-200: #b3e3ff;
  --blue-100: #e8f4fd;
  --blue-50: #f0f8ff;
  --text: #1a202c;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 6px;
}

/* --- Base --- */

html { scroll-behavior: smooth; }

body {
  font-family: "IBM Plex Sans", system-ui, BlinkMacSystemFont, Helvetica, sans-serif;
  font-weight: 400;
  line-height: 1.8;
  font-size: 1.15rem;
  margin: 0;
  color: var(--text);
  background: var(--blue-50);
}

a {
  color: var(--blue-500);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
  transition: color 0.15s ease;
}
a:hover { color: var(--blue-700); }

:focus-visible {
  outline: 2px solid var(--blue-400);
  outline-offset: 2px;
}

::selection { background: rgba(0, 121, 193, 0.2); }

p > mark {
  background: linear-gradient(120deg, rgba(33,150,212,0.12), rgba(33,150,212,0.22));
  padding: 0.1em 0.3em;
  border-radius: 2px;
  font-style: italic;
}

/* ==============================
   HOMEPAGE
   ============================== */

.home header {
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-700) 40%, var(--blue-500) 100%);
  padding: 3rem 0 4.5rem;
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2.5rem), 0 100%);
  position: relative;
  overflow: hidden;
}

.home header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    115deg,
    transparent,
    transparent 60px,
    rgba(255,255,255,0.035) 60px,
    rgba(255,255,255,0.035) 62px
  );
  pointer-events: none;
}

.home header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2.5rem;
  background: linear-gradient(to right, rgba(255,255,255,0.15), rgba(77,184,232,0.3), rgba(255,255,255,0.15));
  clip-path: polygon(0 calc(100% - 2px), 100% 0, 100% 2px, 0 100%);
  pointer-events: none;
}

.header-brand {
  margin: 0 auto;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  position: relative;
}

.header-brand .brand-text,
.header-brand .brand-blur {
  font-family: 'Overpass', system-ui, sans-serif;
  font-weight: 500;
  font-style: italic;
  font-size: 3.8rem;
  color: white;
  letter-spacing: 0.03em;
  line-height: 1;
}

.header-brand .brand-blur {
  position: absolute;
  opacity: 0.35;
  filter: blur(6px);
  transform: scaleX(1.6) translateX(-12px);
  pointer-events: none;
  user-select: none;
}

.header-brand .brand-blur.brand-blur-far {
  opacity: 0.15;
  filter: blur(12px);
  transform: scaleX(2.2) translateX(-22px);
}

.tagline {
  color: rgba(255,255,255,0.6);
  text-align: center;
  margin: 0.75rem 0 0;
  font-size: 1rem;
  letter-spacing: 0.03em;
  position: relative;
}

.header-from {
  text-align: center;
  margin: 0.75rem 0 0;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  position: relative;
}

.header-from a {
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color 0.15s ease;
}

.header-from a:hover {
  color: rgba(255,255,255,0.7);
}

.header-from img {
  opacity: 0.5;
  transition: opacity 0.15s ease;
}

.header-from a:hover img {
  opacity: 0.8;
}

/* Homepage list */

.home main {
  max-width: 64rem;
  margin: -0.5rem auto 0;
  padding: 0 1.5rem 3rem;
}

.home article.listing {
  display: flex;
  flex-direction: row;
  gap: 1.5rem;
  padding: 1.5rem 0 1.75rem;
  margin: 0;
  position: relative;
}

.home article.listing::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--blue-400), transparent);
  box-shadow: 0 0 6px rgba(33, 150, 212, 0.4), 0 0 14px rgba(33, 150, 212, 0.15);
}

.home article.listing:last-child::after {
  display: none;
}

.home article.listing > a {
  flex-shrink: 0;
  display: block;
}

.home article.listing > a img {
  width: 200px;
  height: 130px;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
}

.home article.listing > a .listing-placeholder {
  width: 200px;
  height: 130px;
  border-radius: var(--radius);
  display: block;
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600));
}

.home article.listing > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.home article .sub {
  text-transform: uppercase;
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  margin: 0 0 0.4rem;
  color: var(--blue-500);
}

.home article h1 {
  font-size: 1.75rem;
  line-height: 1.3;
  font-weight: 600;
  margin: 0;
  text-wrap: balance;
}

.home article h1 a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s ease;
}
.home article h1 a:hover { color: var(--blue-600); }

.home article .description {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0.35rem 0 0;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.home article .byline, .home article .byline a {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0.5rem 0 0;
  text-decoration: none;
}

/* ==============================
   ARTICLE PAGES
   ============================== */

article {
  display: flex;
  flex-direction: column;
  margin: 0 auto;
}

header {
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-700) 45%, var(--blue-500) 100%);
  margin-top: 0;
  margin-bottom: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2.5rem), 0 100%);
  padding-bottom: 4rem;
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    115deg,
    transparent,
    transparent 60px,
    rgba(255,255,255,0.03) 60px,
    rgba(255,255,255,0.03) 62px
  );
  pointer-events: none;
}

header ::selection { background: rgba(255, 255, 255, 0.3); }

header .sub {
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  color: rgba(255,255,255,0.65);
  font-weight: 600;
  margin-top: 5.5rem;
  opacity: 1;
}

header h1 {
  font-size: 2.8rem;
  line-height: 1.1;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 0;
  color: white;
}

header h1 + h2 {
  margin-top: 0.75rem;
  font-size: 1.2rem;
  font-weight: 400;
  color: rgba(255,255,255,0.7);
  margin-bottom: 1rem;
  border-bottom: none;
}

header .byline {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.6);
}
header .byline a { color: rgba(255,255,255,0.8); }
header .byline a:hover { color: white; }

/* Content centering (article pages) */

.article .content,
.article header > * {
  max-width: 50rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.article .content > h2 {
  font-weight: 600;
  font-size: 1.8rem;
  display: inline-block;
  border-bottom: 3px solid var(--blue-400);
  padding-bottom: 2px;
}

/* ==============================
   SHARED COMPONENTS
   ============================== */

pre {
  margin-left: 0;
  max-width: 90vw;
  overflow: hidden;
  overflow-x: scroll;
}

code {
  font-family: "IBM Plex Mono", menlo, consolas, monaco, monospace;
  font-size: 0.8em;
  line-height: 1.25rem;
}

pre code { padding: 1em 0; }

.hljs {
  background: #f1f5f9 !important;
  padding: 1.25rem 1.5rem !important;
  border-radius: var(--radius);
  border-left: 3px solid var(--blue-500);
}

blockquote {
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  margin-left: 0;
  color: var(--text-muted);
  border-left: 4px solid var(--blue-400);
  background: var(--blue-100);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.author_meta {
  display: grid;
  grid-template-columns: 100px 1fr;
  grid-column-gap: 24px;
  align-items: center;
  margin-right: 0;
}

.author_meta img {
  border-radius: 50%;
  width: 100px;
  height: 100px;
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  border: 3px solid white;
}

.author_meta h4 {
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  margin: 0;
}

.author_meta h2 {
  margin: 4px 0;
  font-size: 1.5rem;
  font-weight: 600;
  border-bottom: none;
}

.author_meta p {
  margin: 6px 0;
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--text-muted);
}

.twitter {
  width: 22px;
  height: 22px;
  vertical-align: -3px;
  margin-left: 4px;
}

.twitter > path {
  fill: var(--text-muted);
  transition: fill 0.15s ease;
}
.twitter:hover > path { fill: var(--blue-400); }

  .bluesky {                                                                            
    width: 22px;                                                                        
    height: 22px;                                                                       
    vertical-align: -3px;
    margin-left: 4px;
  }

  .bluesky > path {
    fill: var(--text-muted);
    transition: fill 0.15s ease;
  }
  .bluesky:hover > path { fill: #0085ff; }

hr {
  border: none;
  height: 1px;
  background: linear-gradient(to right, var(--blue-200), var(--border), transparent);
  margin: 2.5rem 0;
  width: 40%;
}

hr.article_end {
  width: 100%;
  height: 2px;
  background: var(--border);
}

hr.promo_line {
  width: 100%;
  height: 2px;
  background: var(--blue-200);
}

.promo {
  display: grid;
  grid-template-columns: 100px 1fr;
  grid-column-gap: 24px;
  align-items: center;
  margin-bottom: 3rem;
  padding: 1.5rem;
  background: var(--blue-100);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.promo img {
  width: 100%;
  border-radius: 4px;
}

.promo h2 {
  font-weight: 600;
  font-size: 1.25rem;
  border-bottom: none;
  display: block;
  line-height: 1.3;
  margin: 0 0 0.4rem;
}

.promo_copy p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Footer */

footer {
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-700) 45%, var(--blue-500) 100%);
  clip-path: polygon(0 2.5rem, 100% 0, 100% 100%, 0 100%);
  padding: 5rem 0 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    115deg,
    transparent,
    transparent 60px,
    rgba(255,255,255,0.03) 60px,
    rgba(255,255,255,0.03) 62px
  );
  pointer-events: none;
}

footer::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2.5rem;
  background: linear-gradient(to right, rgba(255,255,255,0.15), rgba(77,184,232,0.3), rgba(255,255,255,0.15));
  clip-path: polygon(0 100%, 100% 0, 100% 2px, 0 calc(100% + 2px));
  pointer-events: none;
}

footer a {
  display: inline-block;
  opacity: 0.6;
  transition: opacity 0.2s ease;
}

footer a:hover {
  opacity: 1;
}

footer img {
  display: block;
}

/* Floating nav */

.home #logo { display: none; }

.rss-link {
  position: fixed;
  top: 14px;
  right: 14px;
  background: rgba(0, 59, 102, 0.88);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  padding: 8px;
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 4px 20px rgba(0, 40, 80, 0.3);
  transition: all 0.2s ease-out;
  z-index: 100;
  line-height: 0;
}

.rss-link:hover {
  background: rgba(0, 77, 128, 0.95);
  box-shadow: 0 6px 28px rgba(0, 40, 80, 0.4);
  transform: translateY(-2px);
}

.rss-link svg { display: block; }

#logo {
  position: fixed;
  top: 12px;
  left: 12px;
  background: rgba(0, 59, 102, 0.88);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  color: white;
  padding: 8px 16px;
  box-shadow: 0 4px 20px rgba(0, 40, 80, 0.3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  transition: all 0.2s ease-out;
  z-index: 100;
  text-align: center;
  font-style: normal;
}

#logo:hover {
  background: rgba(0, 77, 128, 0.95);
  box-shadow: 0 6px 28px rgba(0, 40, 80, 0.4);
  transform: translateY(-2px);
}

#logo a {
  color: white;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-brand {
  font-family: 'Overpass', system-ui, sans-serif;
  font-weight: 500;
  font-style: italic;
  letter-spacing: 0.03em;
}

header figure img { max-width: 100px; }

/* ==============================
   RESPONSIVE
   ============================== */

@media (max-width: 767px) {
  .home main {
    padding: 0 1rem 2rem;
  }

  .home article.listing {
    flex-direction: column;
    gap: 0.75rem;
  }

  .home article.listing > a img,
  .home article.listing > a .listing-placeholder {
    width: 100%;
    height: 180px;
  }

  .home header {
    padding: 2rem 0 3.5rem;
  }

  header h1 {
    font-size: 2rem;
  }
}

@media only screen and (max-width: 640px) {
  html { font-size: 0.9em; }
}

@media only screen and (max-width: 540px) {
  html { font-size: 0.85em; }

  header h1 { font-size: 1.8rem; }

  .home header { padding: 1.5rem 0 3rem; }
}