/* ========================================================================
   ALEPH ZERO — Redesigned: Pure Black, Clinical, High-Contrast
   DM Mono + Inter — Glass Nav — Ultra-minimal
   ======================================================================== */

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Inter:wght@300;400;500;600&display=swap');

/* ---- Design Tokens ---- */
:root {
  /* Fonts */
  --font-mono: 'DM Mono', 'SF Mono', monospace;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-display: 'DM Mono', monospace;
  /* Legacy alias used in app.js CSS classes referencing --font-serif */
  --font-serif: 'Inter', 'Helvetica Neue', sans-serif;

  /* Type Scale */
  --text-xs:   clamp(0.6875rem, 0.65rem + 0.2vw, 0.8125rem);
  --text-sm:   clamp(0.8125rem, 0.75rem + 0.3vw, 0.9375rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1.0625rem);
  --text-lg:   clamp(1.0625rem, 0.95rem + 0.65vw, 1.375rem);
  --text-xl:   clamp(1.375rem, 1.1rem + 1.1vw, 2rem);
  --text-2xl:  clamp(1.75rem, 1.1rem + 2.2vw, 3rem);
  --text-3xl:  clamp(2.25rem, 0.8rem + 3.8vw, 4.5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 8rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 2px;
  --radius-md: 3px;
  --radius-lg: 4px;
  --radius-xl: 6px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 720px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* ---- COLORS (Dark-only) ---- */
  --color-bg:           #000000;
  --color-surface:      #0a0a0a;
  --color-surface-2:    #111111;
  --color-surface-3:    #1a1a1a;
  --color-text:         #ffffff;
  --color-text-muted:   rgba(255,255,255,0.5);
  --color-text-faint:   rgba(255,255,255,0.3);
  --color-accent:       #ffffff;
  --color-accent-hover: rgba(255,255,255,0.8);
  --color-accent-dim:   rgba(255,255,255,0.05);
  --color-border:       rgba(255,255,255,0.1);
  --color-border-subtle: rgba(255,255,255,0.06);
  --color-divider:      rgba(255,255,255,0.08);
  --color-text-inverse: #000000;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.6);
}

/* Light mode disabled — dark only */
[data-theme="light"] {
  --color-bg:           #000000;
  --color-surface:      #0a0a0a;
  --color-surface-2:    #111111;
  --color-surface-3:    #1a1a1a;
  --color-text:         #ffffff;
  --color-text-muted:   rgba(255,255,255,0.5);
  --color-text-faint:   rgba(255,255,255,0.3);
  --color-accent:       #ffffff;
  --color-accent-hover: rgba(255,255,255,0.8);
  --color-accent-dim:   rgba(255,255,255,0.05);
  --color-border:       rgba(255,255,255,0.1);
  --color-border-subtle: rgba(255,255,255,0.06);
  --color-divider:      rgba(255,255,255,0.08);
  --color-text-inverse: #000000;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.6);
}

/* ========================================================================
   LAYOUT
   ======================================================================== */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

@media (max-width: 640px) {
  .container {
    padding-inline: var(--space-4);
  }
}

/* ========================================================================
   SKIP LINK
   ======================================================================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  z-index: 100;
  font-size: var(--text-sm);
  text-decoration: none;
  font-family: var(--font-mono);
}
.skip-link:focus {
  top: var(--space-4);
}

/* ========================================================================
   FLOATING GLASS NAV — Centered pill
   ======================================================================== */

.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  /* No border-bottom, no full-width */
  border-bottom: none;
  background: transparent;
}

.site-header--scrolled {
  /* Subtle extra shadow on scroll */
}

.header-glass {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-4);
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

.logo-link:hover {
  color: rgba(255,255,255,0.7);
}

/* Hide wordmark — just icon now */
.logo-wordmark {
  display: none;
}

.nav-subscribe-btn {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-interactive);
}

.nav-subscribe-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Header actions — hide theme toggle */
.header-actions {
  display: none;
}

.theme-toggle {
  display: none;
}

/* Mobile nav toggle — hidden, JS references it */
.mobile-nav-toggle {
  display: none !important;
}

/* ========================================================================
   CATEGORY BAR — Between hero and posts
   ======================================================================== */

.category-bar {
  border-bottom: 1px solid rgba(255,255,255,0.1);
  padding: var(--space-6) 0;
  margin-bottom: var(--space-6);
}

/* Hide category bar on article pages */
body:has(.article-view) .category-bar {
  display: none;
}

.category-bar-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
}

.category-description {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 28rem;
  text-align: right;
  line-height: 1.6;
  flex-shrink: 0;
}

/* Category pills nav */
.nav-pills,
.nav-pills-inline {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  max-width: 36rem;
  /* Remove masks and horizontal scroll from old design */
  mask-image: none;
  -webkit-mask-image: none;
  overflow: visible;
  padding: 0;
}
.nav-pills::-webkit-scrollbar { display: none; }

.nav-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.625rem;
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-interactive);
  flex-shrink: 0;
}

.nav-pill:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.2);
}

.nav-pill.active {
  color: #000000;
  background: #ffffff;
  border-color: #ffffff;
}

@media (max-width: 860px) {
  .category-bar-inner {
    flex-direction: column;
    gap: var(--space-4);
  }
  .category-description {
    text-align: left;
    max-width: none;
  }
  .nav-pills,
  .nav-pills-inline {
    max-width: none;
  }
  /* Override old mobile breakpoint that hid nav-pills */
  .nav-pills,
  .nav-pills-inline {
    display: flex !important;
    position: static !important;
    background: transparent !important;
    border-bottom: none !important;
    padding: 0 !important;
    flex-wrap: wrap !important;
  }
  .nav-pills.open {
    display: flex !important;
  }
}

/* ========================================================================
   HERO — Large gradient text + Search bar
   ======================================================================== */

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(var(--space-20), 10vw, var(--space-32)) 0 clamp(var(--space-16), 8vw, var(--space-24));
  text-align: center;
  margin-bottom: 0;
  padding-top: 100px; /* Clear the floating nav */
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  /* Subtle radial glow — white instead of gold */
  background:
    radial-gradient(ellipse at 50% 30%, rgba(255,255,255,0.03) 0%, transparent 60%);
  animation: heroShift 20s ease-in-out infinite alternate;
}

@keyframes heroShift {
  0% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
  100% { opacity: 0.5; transform: scale(1); }
}

.hero-content {
  position: relative;
  z-index: 1;
}

/* Hide the aleph symbol in new design */
.hero-aleph-symbol {
  display: none;
}

/* Hero gradient text — thinner, lower position */
.hero-title {
  font-family: var(--font-body);
  font-size: var(--text-hero);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  margin-top: var(--space-8);
  /* Gradient: bright white fading down */
  background: linear-gradient(180deg, #ffffff 0%, rgba(255,255,255,0.85) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title-italic {
  font-style: normal;
  display: block;
  /* Second line: faded gradient */
  background: linear-gradient(180deg, rgba(255,255,255,0.65) 0%, rgba(255,255,255,0.35) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  max-width: 48ch;
  margin: 0 auto;
}

/* Hero search bar */
.hero-search {
  margin-top: var(--space-10);
  display: flex;
  justify-content: center;
}

.hero-search-wrapper {
  position: relative;
  width: 100%;
  max-width: 640px;
}

.hero-search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255,255,255,0.4);
  pointer-events: none;
}

.hero-search-input {
  width: 100%;
  padding: 16px 16px 16px 48px;
  background: #000000;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 0;
  color: #ffffff;
  font-family: var(--font-body);
  font-size: var(--text-base);
  outline: none;
  transition: border-color var(--transition-interactive), background var(--transition-interactive);
}

.hero-search-input::placeholder {
  color: rgba(255,255,255,0.4);
}

.hero-search-input:focus {
  border-color: rgba(255,255,255,0.4);
  background: #000000;
}

/* ========================================================================
   CONVERGENCE GRAPH
   ======================================================================== */

.convergence-section {
  position: relative;
  width: 100%;
  max-width: var(--content-wide);
  margin: var(--space-2) auto var(--space-12);
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.convergence-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.convergence-labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.convergence-label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  transform: translate(-50%, -50%);
  transition: color 0.3s ease, opacity 0.3s ease;
  pointer-events: auto;
  cursor: default;
  white-space: nowrap;
}

.convergence-label.active {
  color: var(--color-text);
}

.convergence-center-label {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, 12px);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-style: normal;
  color: rgba(255,255,255,0.3);
  opacity: 0.6;
  pointer-events: none;
  white-space: nowrap;
  text-align: center;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .convergence-section {
    height: 300px;
    margin: var(--space-2) auto var(--space-6);
  }
  .convergence-label {
    font-size: 0.5625rem;
  }
  .convergence-center-label {
    font-size: var(--text-xs);
  }
}

@media (max-width: 480px) {
  .convergence-section {
    height: 240px;
  }
}

/* ========================================================================
   FEATURED POST
   ======================================================================== */

.featured-section {
  margin-bottom: clamp(var(--space-10), 6vw, var(--space-16));
}

.featured-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.featured-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.featured-card:hover {
  border-color: rgba(255,255,255,0.2);
  box-shadow: var(--shadow-md);
}

.featured-card-image {
  overflow: hidden;
  position: relative;
}

.featured-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.featured-card:hover .featured-card-image img {
  transform: scale(1.03);
}

.featured-card-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-10);
  background: var(--color-surface-2);
  position: relative;
  overflow: hidden;
}

.featured-card-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 40%, rgba(255,255,255,0.03), transparent 70%);
}

.featured-card-number {
  font-family: var(--font-body);
  font-size: clamp(6rem, 4rem + 5vw, 10rem);
  font-weight: 300;
  color: var(--color-text);
  opacity: 0.08;
  line-height: 1;
  position: relative;
  z-index: 1;
}

.featured-card-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-8);
}

.featured-card-body .category-badge {
  margin-bottom: var(--space-3);
  align-self: flex-start;
}

.featured-card-title {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.featured-card-excerpt {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.featured-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
}

.meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-faint);
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .featured-card {
    grid-template-columns: 1fr;
  }
  .featured-card-visual {
    padding: var(--space-8);
    min-height: 160px;
  }
  .featured-card-body {
    padding: var(--space-6);
  }
}

/* ========================================================================
   CATEGORY BADGE
   ======================================================================== */

.category-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  padding: 4px 8px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.04);
  line-height: 1;
}

/* ========================================================================
   BLOG GRID
   ======================================================================== */

.posts-section {
  padding-bottom: clamp(var(--space-12), 8vw, var(--space-24));
}

.section-title {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.01em;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 960px) {
  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .posts-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

/* Post Card */
.post-card {
  display: flex;
  flex-direction: column;
  background: transparent;
  border: 1px solid transparent;
  padding: 0;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-interactive),
              background var(--transition-interactive);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  border-left: none;
}

.post-card-image {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--color-surface-2);
}

.post-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

.post-card:hover .post-card-image img {
  transform: scale(1.04);
}

/* Cards without image */
.post-card:not(:has(.post-card-image)) {
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.06);
}

/* Cards with image */
.post-card:has(.post-card-image) .post-card-body {
  padding: var(--space-4) var(--space-5) var(--space-5);
}

.post-card:hover {
  background: var(--color-surface);
  border-color: rgba(255,255,255,0.1);
}

.post-card:has(.post-card-image):hover {
  box-shadow: var(--shadow-md);
}

.post-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.post-card-body .category-badge {
  align-self: flex-start;
  margin-bottom: var(--space-3);
}

.post-card-title {
  font-family: var(--font-body);
  font-size: clamp(1.125rem, 0.9rem + 0.6vw, 1.375rem);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.25;
}

.post-card-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex: 1;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
  margin-top: auto;
}

/* ========================================================================
   ARTICLE VIEW
   ======================================================================== */

.article-view {
  padding-bottom: clamp(var(--space-12), 8vw, var(--space-24));
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  margin-bottom: var(--space-8);
  padding: var(--space-2) 0;
  transition: color var(--transition-interactive);
}

.article-back:hover {
  color: var(--color-text);
}

/* Article header — cover image */
.article-header-image {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-8);
  background: var(--color-surface-2);
}

.article-header-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Article header — fallback visual */
.article-header-visual {
  width: 100%;
  aspect-ratio: 21/9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-8);
  background: var(--color-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.article-header-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.03), transparent 60%);
}

.article-header-visual .category-badge {
  position: relative;
  z-index: 1;
  font-size: var(--text-sm);
}

.article-meta-section {
  max-width: var(--content-narrow);
  margin: 0 auto var(--space-8);
}

.article-meta-section .category-badge {
  margin-bottom: var(--space-4);
}

.article-title {
  font-family: var(--font-body);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.article-author {
  font-weight: 500;
  color: var(--color-text);
}

/* Article Body (rendered markdown) */
.article-body {
  max-width: var(--content-narrow);
  margin: 0 auto;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.7;
  color: rgba(255,255,255,0.85);
}

.article-body h1 {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.article-body h2 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.article-body h3 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.article-body p {
  margin-bottom: var(--space-4);
  max-width: 72ch;
}

.article-body ul, .article-body ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.article-body li {
  margin-bottom: var(--space-2);
}

.article-body blockquote {
  border-left: 2px solid rgba(255,255,255,0.1);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.article-body blockquote p {
  max-width: none;
  font-size: inherit;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-surface-2);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
}

.article-body pre {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin: var(--space-6) 0;
  overflow-x: auto;
}

.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: var(--text-sm);
}

.article-body img {
  border-radius: var(--radius-md);
  margin: var(--space-6) 0;
}

.article-body a {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(255,255,255,0.3);
}

.article-body a:hover {
  text-decoration-color: rgba(255,255,255,0.8);
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}

/* Tags */
.article-tags {
  max-width: var(--content-narrow);
  margin: var(--space-8) auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.article-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-subtle);
}

/* Related Posts */
.related-section {
  margin-top: clamp(var(--space-12), 8vw, var(--space-20));
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.related-section .section-title {
  margin-bottom: var(--space-6);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .related-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

/* ========================================================================
   SKELETON LOADERS
   ======================================================================== */

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(90deg,
    var(--color-surface-2) 25%,
    var(--color-surface-3) 50%,
    var(--color-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.skeleton-card {
  padding: var(--space-5) var(--space-6);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-text.w-full { width: 100%; }
.skeleton-text.w-3-4 { width: 75%; }
.skeleton-text.w-1-2 { width: 50%; }
.skeleton-text.w-1-3 { width: 33%; }

.skeleton-badge {
  width: 80px;
  height: 20px;
  margin-bottom: var(--space-3);
}

/* Featured skeleton */
.skeleton-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-8);
}

.skeleton-featured-image {
  background: var(--color-surface-2);
  min-height: 250px;
}

.skeleton-featured-body {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-3);
}

@media (max-width: 768px) {
  .skeleton-featured {
    grid-template-columns: 1fr;
  }
}

/* ========================================================================
   EMPTY / ERROR STATES
   ======================================================================== */

.state-message {
  text-align: center;
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
}

.state-symbol {
  font-family: var(--font-body);
  font-size: var(--text-3xl);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
  opacity: 0.4;
}

.state-title {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.state-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.retry-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background var(--transition-interactive),
              transform var(--transition-interactive);
}

.retry-btn:hover {
  background: rgba(255,255,255,0.85);
  transform: translateY(-1px);
}

/* ========================================================================
   SUBSCRIBE FORMS
   ======================================================================== */

.subscribe-form {
  margin-top: var(--space-6);
}

.subscribe-input-group {
  display: flex;
  gap: 0;
  max-width: 420px;
  margin: 0 auto;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.2);
  background: var(--color-bg);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.subscribe-input-group:focus-within {
  border-color: rgba(255,255,255,0.4);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.05);
}

.subscribe-input {
  flex: 1;
  min-width: 0;
  padding: var(--space-3) var(--space-5);
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.subscribe-input::placeholder {
  color: var(--color-text-faint);
}

.subscribe-btn {
  flex-shrink: 0;
  padding: var(--space-3) var(--space-6);
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  border: none;
  cursor: pointer;
  transition: background var(--transition-interactive);
  white-space: nowrap;
}

.subscribe-btn:hover {
  background: rgba(255,255,255,0.85);
}

.subscribe-btn:disabled {
  opacity: 0.7;
  cursor: wait;
}

.subscribe-hint {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
  text-align: center;
}

.subscribe-success {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-3) 0;
}

.subscribe-error {
  color: #ff4444;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  text-align: center;
  margin-top: var(--space-2);
}

/* Hero subscribe form — hidden */
.subscribe-form--hero .subscribe-input-group {
  margin: 0;
}

.subscribe-form--hero .subscribe-hint {
  text-align: center;
}

/* Article subscribe CTA */
.article-subscribe {
  max-width: var(--content-narrow);
  margin: var(--space-10) auto 0;
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.article-subscribe-title {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.subscribe-form--article {
  margin-top: var(--space-4);
}

/* Subscribe block (before footer) */
.subscribe-section {
  padding: clamp(var(--space-12), 6vw, var(--space-20)) 0;
  border-top: 1px solid var(--color-border);
}

.subscribe-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  max-width: var(--content-default);
  margin: 0 auto;
}

.subscribe-block-content {
  flex: 1;
  min-width: 0;
}

.subscribe-block-title {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.subscribe-block-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 48ch;
}

.subscribe-form--block {
  flex-shrink: 0;
  margin-top: 0;
}

.subscribe-form--block .subscribe-input-group {
  margin: 0;
}

.subscribe-form--block .subscribe-hint {
  text-align: right;
}

@media (max-width: 768px) {
  .subscribe-block {
    flex-direction: column;
    text-align: center;
  }
  .subscribe-block-desc {
    max-width: none;
  }
  .subscribe-form--block .subscribe-hint {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .subscribe-input-group {
    flex-direction: column;
    border-radius: var(--radius-md);
  }
  .subscribe-input {
    padding: var(--space-3) var(--space-4);
    text-align: center;
  }
  .subscribe-btn {
    padding: var(--space-3) var(--space-4);
  }
}

/* ========================================================================
   PILLARS SECTION
   ======================================================================== */

.pillars-section {
  padding: clamp(var(--space-12), 6vw, var(--space-20)) 0;
}

/* Hide pillars on article pages */
body:has(.article-view) .pillars-section {
  display: none;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.pillar-cell {
  background: var(--color-bg);
  padding: clamp(var(--space-6), 3vw, var(--space-10));
  transition: background var(--transition-slow);
  cursor: default;
  position: relative;
}

.pillar-cell:hover {
  background: rgba(255, 255, 255, 0.02);
}

.pillar-arrow {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
  transition: transform var(--transition-interactive),
              color var(--transition-interactive);
}

.pillar-cell:hover .pillar-arrow {
  transform: translateX(6px);
  color: var(--color-text);
}

.pillar-title {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.pillar-desc {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 36ch;
}

@media (max-width: 960px) {
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .pillars-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================================================
   FOOTER
   ======================================================================== */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0;
  text-align: center;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copyright {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
}

.footer-attribution a {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

@media (max-width: 640px) {
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ========================================================================
   ANIMATIONS
   ======================================================================== */

.fade-in {
  opacity: 0;
  animation: fadeIn 400ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

.fade-in-up {
  opacity: 0;
  transform: translateY(8px);
  animation: fadeInUp 500ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

/* Stagger children */
.stagger > * {
  opacity: 0;
  animation: fadeInUp 400ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.stagger > *:nth-child(1) { animation-delay: 50ms; }
.stagger > *:nth-child(2) { animation-delay: 100ms; }
.stagger > *:nth-child(3) { animation-delay: 150ms; }
.stagger > *:nth-child(4) { animation-delay: 200ms; }
.stagger > *:nth-child(5) { animation-delay: 250ms; }
.stagger > *:nth-child(6) { animation-delay: 300ms; }
.stagger > *:nth-child(7) { animation-delay: 350ms; }
.stagger > *:nth-child(8) { animation-delay: 400ms; }
.stagger > *:nth-child(9) { animation-delay: 450ms; }

/* ========================================================================
   RESPONSIVE FINE-TUNING
   ======================================================================== */

@media (max-width: 640px) {
  .hero-title {
    font-size: var(--text-2xl);
  }
  .article-title {
    font-size: var(--text-xl);
  }
  .featured-card-title {
    font-size: var(--text-lg);
  }
  .hero {
    padding-top: clamp(var(--space-16), 10vw, var(--space-24));
  }
}