/* ============================================================
   Signal Desk — AI Trading Research Blog
   Professional crypto aesthetic · Static site for Cloudflare Pages
   ============================================================ */

:root {
  /* Core palette */
  --bg-deep: #05070d;
  --bg-base: #0a0e17;
  --bg-elevated: #0f1520;
  --bg-card: #121a28;
  --bg-card-hover: #172033;
  --bg-muted: #1a2436;

  /* Borders */
  --border: rgba(148, 163, 184, 0.08);
  --border-strong: rgba(148, 163, 184, 0.16);
  --border-accent: rgba(0, 212, 170, 0.35);

  /* Accents */
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.12);
  --accent-glow: rgba(0, 212, 170, 0.25);
  --cyan: #22d3ee;
  --cyan-dim: rgba(34, 211, 238, 0.12);
  --amber: #fbbf24;
  --rose: #fb7185;
  --violet: #a78bfa;

  /* Text */
  --text: #e8edf5;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #05070d;

  /* Gradients */
  --grad-accent: linear-gradient(135deg, #00d4aa 0%, #22d3ee 100%);
  --grad-hero: radial-gradient(ellipse 80% 60% at 50% -20%, rgba(0, 212, 170, 0.15), transparent 60%),
    radial-gradient(ellipse 50% 40% at 90% 10%, rgba(34, 211, 238, 0.08), transparent 50%),
    radial-gradient(ellipse 40% 30% at 10% 20%, rgba(167, 139, 250, 0.06), transparent 50%);
  --grad-card: linear-gradient(180deg, rgba(18, 26, 40, 0.9) 0%, rgba(15, 21, 32, 0.95) 100%);

  /* Typography */
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Space Grotesk", var(--font-sans);
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Layout */
  --max-w: 1120px;
  --max-w-prose: 720px;
  --header-h: 72px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35), 0 0 0 1px var(--border);
  --shadow-glow: 0 0 40px var(--accent-glow);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
  width: 100%;
  position: relative;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; border: none; background: none; cursor: pointer; color: inherit; }

/* Background grid */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, black 20%, transparent 75%);
}

/* Utilities */
.container {
  width: min(100% - 2.5rem, var(--max-w));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}
.container--narrow {
  width: min(100% - 2.5rem, var(--max-w-prose));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(5, 7, 13, 0.75);
  backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 2.5rem, var(--max-w));
  margin-inline: auto;
  gap: 1.5rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: -0.03em;
}
.logo:hover .logo-mark {
  box-shadow: 0 0 28px var(--accent-glow);
  transform: translateY(-0.5px);
}
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: transparent;
  display: grid;
  place-items: center;
  box-shadow: 0 0 22px var(--accent-glow);
  flex-shrink: 0;
  overflow: hidden;
  transition: box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}
.logo-mark img,
.logo-mark svg {
  width: 100%;
  height: 100%;
  display: block;
}
.logo-text {
  display: inline-flex;
  align-items: baseline;
  gap: 0;
}
.logo-text span { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav a {
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--text);
  background: var(--bg-muted);
}
.nav a[aria-current="page"] {
  color: var(--accent);
}

.nav-cta {
  margin-left: 0.5rem;
  padding: 0.55rem 1.1rem !important;
  background: var(--grad-accent) !important;
  color: var(--text-inverse) !important;
  font-weight: 600 !important;
  border-radius: 8px !important;
  box-shadow: 0 0 24px var(--accent-glow);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease) !important;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 32px var(--accent-glow) !important;
  background: var(--grad-accent) !important;
  color: var(--text-inverse) !important;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 5rem 0 4rem;
  background: var(--grad-hero);
  overflow: hidden;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 999px;
  margin-bottom: 1.5rem;
}
.hero-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  max-width: 16ch;
  margin-bottom: 1.25rem;
}
.hero h1 em {
  font-style: normal;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 42ch;
  margin-bottom: 2rem;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3.5rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--grad-accent);
  color: var(--text-inverse);
  box-shadow: 0 0 28px var(--accent-glow);
}
.btn-primary:hover { box-shadow: 0 0 40px var(--accent-glow); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--bg-muted); border-color: var(--text-muted); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  max-width: 520px;
}
.stat {
  padding: 1rem 1.15rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.stat-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* ---------- Sections ---------- */
.section {
  padding: 4.5rem 0;
  position: relative;
  z-index: 1;
}
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.section-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: gap 0.2s var(--ease);
}
.section-link:hover { gap: 0.55rem; }

/* ---------- Article cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.card-grid--2 { grid-template-columns: repeat(2, 1fr); }

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--grad-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
  height: 100%;
}
.article-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}
.card-thumb {
  aspect-ratio: 16 / 9;
  background: var(--bg-muted);
  position: relative;
  overflow: hidden;
}
.card-thumb img,
.card-thumb-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s var(--ease);
}
.article-card:hover .card-thumb img,
.article-card:hover .card-thumb-img,
.featured:hover .card-thumb img {
  transform: scale(1.04);
}
.card-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(5, 7, 13, 0.35) 100%);
  pointer-events: none;
  z-index: 1;
}
.card-thumb-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.9;
}
.card-thumb-pattern--1 {
  background:
    radial-gradient(circle at 20% 80%, rgba(0, 212, 170, 0.35), transparent 45%),
    radial-gradient(circle at 80% 20%, rgba(34, 211, 238, 0.25), transparent 40%),
    linear-gradient(135deg, #0f1520, #1a2436);
}
.card-thumb-pattern--2 {
  background:
    radial-gradient(circle at 70% 70%, rgba(167, 139, 250, 0.3), transparent 45%),
    radial-gradient(circle at 30% 30%, rgba(0, 212, 170, 0.2), transparent 40%),
    linear-gradient(160deg, #0a0e17, #172033);
}
.card-thumb-pattern--3 {
  background:
    radial-gradient(circle at 50% 50%, rgba(251, 191, 36, 0.2), transparent 50%),
    radial-gradient(circle at 10% 90%, rgba(34, 211, 238, 0.25), transparent 40%),
    linear-gradient(200deg, #0f1520, #121a28);
}
.card-thumb-pattern--4 {
  background:
    radial-gradient(circle at 80% 40%, rgba(251, 113, 133, 0.25), transparent 45%),
    radial-gradient(circle at 20% 60%, rgba(0, 212, 170, 0.2), transparent 40%),
    linear-gradient(145deg, #0a0e17, #1a2436);
}
.card-thumb-pattern--5 {
  background:
    radial-gradient(circle at 40% 20%, rgba(34, 211, 238, 0.3), transparent 45%),
    radial-gradient(circle at 60% 80%, rgba(167, 139, 250, 0.2), transparent 40%),
    linear-gradient(170deg, #0f1520, #0a0e17);
}
.card-thumb-icon {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0.65rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  background: linear-gradient(transparent, rgba(5, 7, 13, 0.75));
  color: rgba(232, 237, 245, 0.5);
  text-transform: uppercase;
}

.card-body {
  padding: 1.35rem 1.4rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
}
.card-tag {
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-weight: 500;
}
.card-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.35;
  margin-bottom: 0.6rem;
  transition: color 0.2s;
}
.article-card:hover .card-title { color: var(--accent); }
.card-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 1rem;
}
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.card-read {
  color: var(--cyan);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

/* Featured large card */
.featured {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0;
  background: var(--grad-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 2.5rem;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.featured:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}
.featured-thumb {
  min-height: 280px;
  position: relative;
}
.featured-body {
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.featured-body .card-title {
  font-size: 1.5rem;
  margin-bottom: 0.85rem;
}
.featured-body .card-excerpt {
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

/* ---------- Topics strip ---------- */
.topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.topic-chip {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.topic-chip:hover {
  border-color: var(--border-accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ---------- CTA band ---------- */
.cta-band {
  margin: 1rem 0 0;
  padding: 3rem 2.5rem;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(0, 212, 170, 0.12), transparent 55%),
    var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  text-align: center;
}
.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.cta-band p {
  color: var(--text-secondary);
  max-width: 42ch;
  margin: 0 auto 1.5rem;
}

/* ---------- Reading progress ---------- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  z-index: 200;
  background: var(--grad-accent);
  box-shadow: 0 0 12px var(--accent-glow);
  pointer-events: none;
  transition: width 0.05s linear;
}

/* ---------- Article page ---------- */
.article-hero {
  position: relative;
  padding: 3.25rem 1.75rem 2.75rem;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(ellipse 70% 80% at 15% 0%, rgba(0, 212, 170, 0.14), transparent 55%),
    radial-gradient(ellipse 50% 60% at 90% 30%, rgba(34, 211, 238, 0.08), transparent 50%),
    radial-gradient(ellipse 40% 50% at 60% 100%, rgba(167, 139, 250, 0.06), transparent 45%),
    var(--bg-deep);
}
.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, black 0%, transparent 90%);
  pointer-events: none;
  z-index: 0;
}
.article-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--cyan), transparent);
  opacity: 0.45;
  z-index: 3;
}

/* Cinematic hero with integrated cover image */
.article-hero--cover {
  min-height: clamp(22rem, 52vh, 32rem);
  display: flex;
  align-items: flex-end;
  padding: 0;
  border-bottom: none;
  background: var(--bg-deep);
}
.article-hero--cover::before {
  display: none;
}
.article-hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.article-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transform: scale(1.02);
}
.article-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg,
      rgba(5, 7, 13, 0.55) 0%,
      rgba(5, 7, 13, 0.35) 35%,
      rgba(5, 7, 13, 0.72) 68%,
      rgba(5, 7, 13, 0.97) 100%),
    linear-gradient(90deg,
      rgba(5, 7, 13, 0.55) 0%,
      transparent 45%,
      rgba(5, 7, 13, 0.25) 100%);
  pointer-events: none;
}
/* Soft vignette + brand tint */
.article-hero-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse 60% 50% at 20% 100%, rgba(0, 212, 170, 0.12), transparent 55%),
    radial-gradient(ellipse 40% 40% at 90% 20%, rgba(34, 211, 238, 0.08), transparent 50%);
  pointer-events: none;
}

.article-hero .container--narrow,
.article-hero-inner {
  width: min(100% - 2.5rem, var(--max-w-prose));
  margin-inline: auto;
  padding-inline: 0.25rem;
  position: relative;
  z-index: 2;
  box-sizing: border-box;
}
.article-hero--cover .article-hero-inner {
  width: min(100% - 2.5rem, var(--max-w-prose));
  padding: 4.5rem 0 2.75rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  font-family: var(--font-mono);
}
.article-hero--cover .breadcrumb {
  color: rgba(226, 232, 240, 0.72);
}
.breadcrumb a {
  color: inherit;
  transition: color 0.2s;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { opacity: 0.35; user-select: none; }
.breadcrumb [aria-current="page"] {
  color: var(--text-secondary);
}
.article-hero--cover .breadcrumb [aria-current="page"] {
  color: rgba(241, 245, 249, 0.92);
}

.article-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.5vw, 2.85rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.18;
  margin-bottom: 1.5rem;
  max-width: min(18ch, 100%);
  padding-inline: 0.1rem;
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 50%, #94a3b8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.article-hero--cover h1 {
  max-width: min(20ch, 100%);
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
  color: #f8fafc;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.45);
}

.article-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}
.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  background: rgba(18, 26, 40, 0.8);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  backdrop-filter: blur(10px);
}
.article-hero--cover .meta-chip {
  background: rgba(5, 7, 13, 0.55);
  border-color: rgba(148, 163, 184, 0.22);
  color: rgba(226, 232, 240, 0.9);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}
.meta-chip--tag {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  border-color: var(--border-accent);
}
.article-hero--cover .meta-chip--tag {
  color: var(--accent);
  background: rgba(0, 212, 170, 0.16);
  border-color: rgba(0, 212, 170, 0.4);
}
.meta-chip svg {
  width: 12px;
  height: 12px;
  opacity: 0.7;
  flex-shrink: 0;
}

.article-hero--cover .author-byline {
  border-top-color: rgba(148, 163, 184, 0.18);
  color: rgba(148, 163, 184, 0.9);
}
.article-hero--cover .author-byline strong {
  color: #e2e8f0;
}

/* Legacy standalone cover (fallback if any remain) */
.article-cover {
  display: none;
}

.article-content {
  padding: 0 0 2rem;
  position: relative;
}
/* Soft bridge from hero image into body */
.article-hero--cover + .article-content {
  margin-top: 0;
}
.article-hero--cover + .article-content .article-shell {
  padding-top: 2.25rem;
}

@media (max-width: 720px) {
  .article-hero {
    padding: 2.5rem 1.5rem 2.25rem;
  }
  .article-hero--cover {
    padding: 0;
    min-height: clamp(20rem, 58vh, 28rem);
  }
  .article-hero--cover .article-hero-inner {
    padding: 3.25rem 0 2rem;
  }
  .article-hero h1 {
    max-width: none;
  }
}
.article-shell {
  width: min(100% - 2.5rem, 1080px);
  max-width: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 200px minmax(0, var(--max-w-prose));
  gap: 3rem;
  justify-content: center;
  padding: 3rem 0 1rem;
  position: relative;
  box-sizing: border-box;
  min-width: 0;
}
.article-shell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100%, 720px);
  height: 180px;
  background: radial-gradient(ellipse at 50% 0%, rgba(0, 212, 170, 0.06), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Sticky TOC */
.article-toc {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
  align-self: start;
  max-height: calc(100vh - var(--header-h) - 3rem);
  overflow-y: auto;
  padding: 1rem 0;
  z-index: 1;
}
.article-toc[hidden] { display: none; }
.toc-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  padding-left: 0.75rem;
  border-left: 2px solid var(--border-strong);
}
.toc-list {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.toc-list a {
  display: block;
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  line-height: 1.35;
  color: var(--text-muted);
  border-left: 2px solid transparent;
  border-radius: 0 6px 6px 0;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.toc-list a:hover {
  color: var(--text-secondary);
  background: rgba(26, 36, 54, 0.5);
}
.toc-list a.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-dim);
}

/* Prose */
.prose {
  width: 100%;
  max-width: min(var(--max-w-prose), 100%);
  margin: 0;
  font-size: 1.075rem;
  line-height: 1.75;
  color: #a8b4c4;
  position: relative;
  z-index: 1;
  min-width: 0;
  overflow-wrap: break-word;
  word-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
}
.prose > p:first-of-type,
.prose .lead {
  font-size: 1.2rem;
  line-height: 1.7;
  color: #c5d0de;
  margin-bottom: 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: visible;
}
/* Drop cap only when the first child of .prose is a paragraph (not after asides) */
.prose > p:first-child::first-letter,
.prose > .lead:first-child::first-letter {
  font-family: var(--font-display);
  font-size: 3.1rem;
  font-weight: 700;
  line-height: 0.85;
  float: left;
  margin: 0.12em 0.12em 0 0;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.025em;
  margin: 3rem 0 1.1rem;
  line-height: 1.25;
  padding-top: 0.5rem;
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  max-width: 100%;
  overflow-wrap: break-word;
}
.prose h2::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  margin-top: 0.35em;
  border-radius: 2px;
  background: var(--grad-accent);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: rotate(45deg);
}
.prose h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: #dce4ef;
  margin: 2.15rem 0 0.75rem;
  letter-spacing: -0.015em;
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}
.prose p { margin-bottom: 1.35rem; }

/* Lists — card-like steps */
.prose ul,
.prose ol {
  margin: 0 0 1.75rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.prose ul li,
.prose ol li {
  position: relative;
  padding: 0.85rem 1rem 0.85rem 2.85rem;
  background: linear-gradient(135deg, rgba(18, 26, 40, 0.9), rgba(15, 21, 32, 0.6));
  border: 1px solid var(--border);
  border-radius: 10px;
  margin: 0;
  transition: border-color 0.2s, background 0.2s;
  max-width: 100%;
  box-sizing: border-box;
  overflow-wrap: break-word;
  word-break: break-word;
}
.prose ul li:hover,
.prose ol li:hover {
  border-color: var(--border-strong);
  background: var(--bg-card);
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 1.05rem;
  top: 1.2rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}
.prose ol {
  counter-reset: step;
}
.prose ol li {
  counter-increment: step;
  padding-left: 3.25rem;
}
.prose ol li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 7px;
  display: grid;
  place-items: center;
  box-shadow: none;
}

.prose strong { color: #eef2f7; font-weight: 600; }
.prose em { color: #c5d0de; font-style: italic; }
.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(34, 211, 238, 0.35);
  transition: text-decoration-color 0.2s, color 0.2s;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.prose a:hover {
  color: #67e8f9;
  text-decoration-color: var(--cyan);
}

/* Blockquote */
.prose blockquote {
  position: relative;
  margin: 2.25rem 0;
  padding: 1.5rem 1.5rem 1.5rem 1.75rem;
  border: 1px solid var(--border-accent);
  border-left: 3px solid var(--accent);
  background:
    radial-gradient(ellipse at 0% 50%, rgba(0, 212, 170, 0.1), transparent 55%),
    var(--bg-card);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.55;
  letter-spacing: -0.01em;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}
.prose blockquote::before {
  content: "“";
  position: absolute;
  top: -0.35rem;
  right: 1rem;
  font-size: 3.5rem;
  font-family: Georgia, serif;
  line-height: 1;
  color: var(--accent);
  opacity: 0.25;
  pointer-events: none;
}

/* Code */
.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: rgba(26, 36, 54, 0.9);
  padding: 0.18em 0.45em;
  border-radius: 5px;
  color: var(--cyan);
  border: 1px solid var(--border);
}
.prose pre {
  position: relative;
  margin: 1.75rem 0;
  padding: 1.15rem 1.25rem 1.25rem;
  background: #0c111b;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  box-sizing: border-box;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.65;
  color: #b8c4d4;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03), 0 12px 40px rgba(0, 0, 0, 0.35);
}
.prose pre::before {
  content: "";
  display: block;
  height: 10px;
  margin: -0.25rem 0 0.9rem;
  background:
    radial-gradient(circle at 8px 5px, #fb7185 3.5px, transparent 4px),
    radial-gradient(circle at 24px 5px, #fbbf24 3.5px, transparent 4px),
    radial-gradient(circle at 40px 5px, #00d4aa 3.5px, transparent 4px);
  opacity: 0.85;
}
.prose pre code {
  background: none;
  padding: 0;
  border: none;
  color: inherit;
  font-size: inherit;
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
  display: block;
  min-width: min-content;
}

.prose hr {
  border: none;
  height: 1px;
  margin: 3rem 0;
  background: linear-gradient(90deg, transparent, var(--border-strong), var(--accent), var(--border-strong), transparent);
  opacity: 0.7;
}

/* Comparison tables in prose */
.prose .compare-table-wrap {
  margin: 1.75rem 0 2rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
  box-sizing: border-box;
}
.prose table.compare-table {
  width: 100%;
  min-width: 0;
  border-collapse: collapse;
  font-size: 0.92rem;
  line-height: 1.5;
}
.prose table.compare-table th,
.prose table.compare-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  overflow-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
}
.prose table.compare-table th {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: rgba(10, 14, 23, 0.65);
}
.prose table.compare-table th:first-child,
.prose table.compare-table td:first-child {
  color: var(--text);
  font-weight: 600;
  white-space: normal;
  min-width: 5.5rem;
}
.prose table.compare-table tbody tr:last-child th,
.prose table.compare-table tbody tr:last-child td {
  border-bottom: none;
}
.prose table.compare-table tbody tr:hover td {
  background: rgba(0, 212, 170, 0.04);
}
.prose table.compare-table .col-agent {
  color: var(--accent);
}

/* Start-here path */
.start-path {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.75rem;
  margin-top: 0.5rem;
}
.start-path a {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 1rem 1.1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  min-height: 100%;
}
.start-path a:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: 0 0 24px var(--accent-glow);
}
.start-path .step-n {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.06em;
}
.start-path .step-t {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.start-path .step-d {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}
@media (max-width: 960px) {
  .start-path { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .start-path { grid-template-columns: 1fr; }
}

/* SEO / GEO content blocks */
.definition-box {
  margin: 0 0 1.75rem;
  padding: 1.35rem 1.45rem 1.4rem;
  background:
    radial-gradient(ellipse at 100% 0%, rgba(34, 211, 238, 0.08), transparent 50%),
    linear-gradient(135deg, rgba(18, 26, 40, 0.98), rgba(12, 18, 28, 0.95));
  border: 1px solid var(--border-accent);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.28);
  max-width: 100%;
  box-sizing: border-box;
  overflow-wrap: break-word;
  word-break: break-word;
}
.definition-box-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.65rem;
}
.definition-box-label::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}
.definition-box p {
  margin: 0 0 0.75rem !important;
  font-size: 1.08rem !important;
  line-height: 1.65 !important;
  color: #e8edf5 !important;
  font-weight: 500;
}
.definition-box p:last-child {
  margin-bottom: 0 !important;
}
.definition-box .definition-source {
  margin: 0.85rem 0 0 !important;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem !important;
  font-weight: 400 !important;
  color: var(--text-muted) !important;
  line-height: 1.45 !important;
}
.definition-box .definition-source a {
  color: var(--cyan);
  text-decoration: none;
  font-weight: 500;
}
.definition-box .definition-source a:hover {
  text-decoration: underline;
}

/* Glossary */
.glossary-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 2.5rem 0 4rem;
}
.glossary-term {
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
  padding: 1.25rem 1.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s;
}
.glossary-term:hover {
  border-color: var(--border-strong);
}
.glossary-term h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 0.5rem;
  letter-spacing: -0.015em;
}
.glossary-term h2 a {
  color: inherit;
  text-decoration: none;
}
.glossary-term h2 a:hover {
  color: var(--accent);
}
.glossary-term p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.65;
}
.glossary-term .glossary-also {
  margin-top: 0.65rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.glossary-term .glossary-also a {
  color: var(--cyan);
}
.glossary-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 2rem;
}
.glossary-nav a {
  font-size: 0.8rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: border-color 0.2s, color 0.2s;
}
.glossary-nav a:hover {
  border-color: var(--border-accent);
  color: var(--accent);
}

.key-takeaways {
  margin: 0 0 2rem;
  padding: 1.35rem 1.4rem 1.4rem;
  background:
    radial-gradient(ellipse at 0% 0%, rgba(0, 212, 170, 0.1), transparent 55%),
    var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
}
.key-takeaways h2 {
  font-family: var(--font-display);
  font-size: 0.95rem !important;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent) !important;
  margin: 0 0 0.85rem !important;
  padding: 0 !important;
  display: block !important;
}
.key-takeaways h2::before { display: none !important; }
.key-takeaways ul {
  margin: 0 !important;
  gap: 0.45rem !important;
}
.key-takeaways li {
  font-size: 0.95rem;
  color: #c5d0de;
}

.faq-section {
  margin: 2.5rem 0 1rem;
  padding-top: 0.5rem;
}
.faq-section > h2 {
  margin-bottom: 1.25rem !important;
}
.faq-item {
  margin-bottom: 0.75rem;
  padding: 1.1rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.faq-item h3 {
  font-family: var(--font-display);
  font-size: 1.02rem !important;
  font-weight: 600;
  color: var(--text) !important;
  margin: 0 0 0.5rem !important;
}
.faq-item p {
  margin: 0 !important;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.author-byline {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.author-byline a.author-byline-link {
  color: inherit;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: color 0.2s;
}
.author-byline a.author-byline-link:hover {
  color: var(--text);
}
.author-byline a.author-byline-link:hover .author-name {
  color: var(--accent);
}
.author-byline strong,
.author-byline .author-name {
  color: var(--text-secondary);
  font-weight: 600;
}
.author-byline .author-role {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}
.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--grad-accent);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--text-inverse);
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: 0 0 0 2px rgba(0, 212, 170, 0.12);
}
.author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Author pages */
.author-hero {
  padding: 3.5rem 0 2.5rem;
  background: var(--grad-hero);
  border-bottom: 1px solid var(--border);
}
.author-hero-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.75rem 2rem;
  align-items: center;
}
.author-hero-photo {
  width: clamp(112px, 18vw, 148px);
  height: clamp(112px, 18vw, 148px);
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border-accent);
  box-shadow: 0 0 40px var(--accent-glow), var(--shadow-card);
  background: var(--bg-card);
}
.author-hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.author-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
}
.author-title {
  font-size: 1.05rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.75rem;
}
.author-hero .lead {
  color: var(--text-secondary);
  max-width: 48ch;
  font-size: 1.02rem;
  line-height: 1.65;
}
.author-meta-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.15rem;
}
.author-body {
  padding: 3rem 0 4rem;
}
.author-body-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
}
.author-bio h2,
.author-sidebar h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.85rem;
  color: var(--text);
}
.author-bio p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1.02rem;
}
.author-sidebar .about-card h3 {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  font-family: var(--font-sans);
  font-weight: 600;
}
.author-sidebar .focus-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.author-sidebar .focus-tags span {
  font-size: 0.8rem;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--border-accent);
}
.author-articles {
  padding: 0 0 4rem;
}
.author-articles .section-header {
  margin-bottom: 1.5rem;
}
.authors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.author-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--grad-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
  height: 100%;
}
.author-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}
.author-card-photo {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--border-accent);
  flex-shrink: 0;
}
.author-card-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.author-card h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
  color: var(--text);
}
.author-card .role {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0.65rem;
}
.author-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
  flex: 1;
}
.author-card .card-read {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--cyan);
  font-weight: 500;
}
@media (max-width: 960px) {
  .authors-grid { grid-template-columns: 1fr; }
  .author-body-grid { grid-template-columns: 1fr; }
  .author-hero-grid { grid-template-columns: 1fr; justify-items: start; }
}

/* Callouts */
.callout {
  position: relative;
  margin: 2rem 0;
  padding: 1.35rem 1.4rem 1.35rem 1.5rem;
  background:
    linear-gradient(135deg, rgba(251, 191, 36, 0.06), transparent 50%),
    var(--bg-card);
  border: 1px solid rgba(251, 191, 36, 0.25);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}
.callout::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--amber), #f59e0b);
}
.callout-title {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 0.6rem;
}
.callout-title::before {
  content: "⚡";
  font-size: 0.85rem;
}
.callout p {
  color: #c5d0de;
  margin-bottom: 0.65rem;
}
.callout p:last-child { margin-bottom: 0; }

/* Article end / nav */
.article-end {
  width: min(100% - 2.5rem, var(--max-w-prose));
  margin: 0 auto 4rem;
  padding: 1.5rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: var(--shadow-card);
  box-sizing: border-box;
}
.article-end-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}
.disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted);
  max-width: 50ch;
  line-height: 1.5;
}

/* Social share */
.article-share {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 0.85rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  width: 100%;
}
.article-share-title {
  width: 100%;
  margin: 0 0 0.15rem;
  font-family: var(--font-display, var(--font-sans));
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text);
}
.article-share-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-right: 0.15rem;
}
.article-share--end .article-share-label {
  /* title already labels the block */
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.article-share--end {
  position: relative;
  margin-bottom: 0.25rem;
  padding: 1.1rem 0 0.25rem;
  border-top: 1px solid var(--border);
}
.article-share-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.95rem;
  font-size: 0.84rem;
  font-weight: 600;
  font-family: var(--font-sans);
  color: var(--text-secondary);
  background: var(--bg-muted);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.2s;
  line-height: 1.2;
}
.share-btn:hover {
  color: var(--text);
  border-color: var(--border-accent);
  background: var(--accent-dim);
  transform: translateY(-1px);
}
.share-btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}
.share-btn--x:hover { border-color: rgba(255,255,255,0.35); }
.share-btn--linkedin:hover { color: #7dd3fc; border-color: rgba(14, 165, 233, 0.45); }
.share-btn--reddit:hover { color: #fb923c; border-color: rgba(249, 115, 22, 0.45); }
.share-btn--copy.is-copied {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--accent-dim);
}
.article-share-hint {
  width: 100%;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0.15rem 0 0;
  line-height: 1.45;
}
.article-share-hint a {
  color: var(--cyan);
}

/* Compact share in hero — high contrast on cover */
.article-share--hero {
  margin-top: 1.25rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(148, 163, 184, 0.28);
}
.article-hero--cover .article-share--hero .share-btn {
  background: rgba(5, 7, 13, 0.72);
  border-color: rgba(0, 212, 170, 0.35);
  color: #f1f5f9;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
}
.article-hero--cover .article-share--hero .share-btn:hover {
  background: rgba(0, 212, 170, 0.18);
  border-color: rgba(0, 212, 170, 0.65);
  color: #fff;
}
.article-hero--cover .article-share--hero .article-share-label {
  color: rgba(226, 232, 240, 0.92);
  font-size: 0.78rem;
}

/* Related strip inside prose footer links */
.prose > p:last-of-type a {
  display: inline;
}

@media (max-width: 960px) {
  .article-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    width: 100%;
    max-width: 100%;
    padding: 2rem 1.25rem 1rem;
    box-sizing: border-box;
  }
  .article-toc {
    display: none;
  }
  .prose {
    max-width: 100%;
  }
  /* Kill drop cap below tablet — it was clipping text on phones */
  .prose > p:first-child::first-letter,
  .prose > .lead:first-child::first-letter,
  .prose > p:first-of-type::first-letter,
  .prose .lead::first-letter {
    font-size: inherit !important;
    font-weight: inherit !important;
    line-height: inherit !important;
    float: none !important;
    margin: 0 !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    background-clip: unset !important;
    color: inherit !important;
  }
  .prose > p:first-of-type,
  .prose .lead {
    font-size: 1.05rem;
    overflow: visible;
  }
  .article-end {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 1.25rem 1.25rem;
    border-radius: 0;
    border-left: none;
    border-right: none;
    box-sizing: border-box;
  }
  .definition-box,
  .key-takeaways,
  .callout,
  .faq-item {
    max-width: 100%;
    box-sizing: border-box;
  }
}

/* ---------- About / page header ---------- */
.page-hero {
  padding: 3.5rem 0 2.5rem;
  background: var(--grad-hero);
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}
.page-hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 50ch;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
  padding: 3.5rem 0 4rem;
}
.about-card {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.about-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.about-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.about-card + .about-card { margin-top: 1rem; }
.value-list li {
  display: flex;
  gap: 0.75rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.value-list li:last-child { border-bottom: none; }
.value-list .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 0.45rem;
  flex-shrink: 0;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ---------- Filters (blog index) ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.filter-btn {
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: all 0.2s var(--ease);
}
.filter-btn:hover,
.filter-btn.is-active {
  color: var(--text-inverse);
  background: var(--accent);
  border-color: var(--accent);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-base);
  padding: 3.5rem 0 2rem;
  position: relative;
  z-index: 1;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer-brand .logo { margin-bottom: 1rem; }
.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 28ch;
  line-height: 1.6;
}
.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 0.3rem 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .featured { grid-template-columns: 1fr; }
  .featured-thumb { min-height: 200px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: rgba(5, 7, 13, 0.97);
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
  }
  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav a { padding: 0.85rem 1rem; }
  .nav-cta { margin-left: 0; margin-top: 0.5rem; text-align: center; justify-content: center; }
  .menu-toggle { display: flex; }
  .card-grid,
  .card-grid--2 { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; max-width: 100%; }
  .hero { padding: 3rem 0 2.5rem; }
  .hero h1 { max-width: none; }
  .hero-lead { max-width: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .cta-band { padding: 2rem 1.5rem; }

  /* Article mobile: keep all text inside viewport */
  .container,
  .container--narrow,
  .article-hero-inner {
    width: 100% !important;
    max-width: 100% !important;
    padding-inline: 1rem !important;
    margin-inline: 0 !important;
    box-sizing: border-box !important;
  }
  .article-hero--cover .article-hero-inner {
    width: 100% !important;
    max-width: 100% !important;
    padding: 2.75rem 1rem 1.5rem !important;
    box-sizing: border-box !important;
  }
  .article-content {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
  }
  .article-shell {
    width: 100% !important;
    max-width: 100% !important;
    padding: 1.25rem 1rem 1rem !important;
    margin: 0 !important;
    grid-template-columns: minmax(0, 1fr) !important;
  }
  .article-shell > * {
    min-width: 0 !important;
    max-width: 100% !important;
  }
  .prose,
  .prose * {
    max-width: 100%;
  }
  .prose pre,
  .prose .compare-table-wrap {
    max-width: 100% !important;
    width: 100% !important;
  }
  /* Extra safety: drop cap never on small screens */
  .prose p::first-letter {
    float: none !important;
    font-size: inherit !important;
    line-height: inherit !important;
    margin: 0 !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    background-clip: unset !important;
    color: inherit !important;
  }
  .article-meta-row {
    gap: 0.4rem;
  }
  .meta-chip {
    max-width: 100%;
    white-space: normal;
    line-height: 1.35;
  }
  .prose {
    font-size: 1rem;
  }
  .prose h2 {
    font-size: 1.28rem;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .prose h2::before {
    margin-top: 0.3em;
  }
  .prose h3 {
    font-size: 1.05rem;
  }
  .prose ul li,
  .prose ol li {
    padding: 0.75rem 0.85rem 0.75rem 2.5rem;
  }
  .prose ol li {
    padding-left: 2.85rem;
  }
  .prose ol li::before {
    left: 0.65rem;
    width: 1.65rem;
    height: 1.65rem;
    font-size: 0.65rem;
  }
  .prose ul li::before {
    left: 0.9rem;
  }
  .prose blockquote {
    padding: 1.15rem 1rem 1.15rem 1.15rem;
    font-size: 1.02rem;
  }
  .prose pre {
    margin-inline: 0;
    padding: 1rem 0.85rem 1.1rem;
    font-size: 0.78rem;
    border-radius: 10px;
  }
  .prose table.compare-table {
    font-size: 0.82rem;
  }
  .prose table.compare-table th,
  .prose table.compare-table td {
    padding: 0.65rem 0.7rem;
  }
  .definition-box,
  .key-takeaways {
    padding: 1.1rem 1rem 1.15rem;
  }
  .definition-box p {
    font-size: 1rem !important;
  }
  .author-byline {
    flex-wrap: wrap;
  }
  .author-byline a.author-byline-link {
    max-width: 100%;
  }
  .site-footer .container {
    padding-inline: 1.15rem;
  }
  .footer-brand p {
    max-width: none;
  }
  .page-hero .container {
    padding-inline: 1.15rem;
  }
  .page-hero h1 {
    overflow-wrap: break-word;
  }
  .start-path {
    grid-template-columns: 1fr;
  }
  .glossary-list {
    padding-inline: 0;
  }
  .glossary-nav {
    padding-inline: 1.15rem;
  }
  .glossary-term {
    margin-inline: 1.15rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}