/* ═══════════════════════════════════════════════════════
   DTX ARTICLE STYLES
   Shared by all blog post pages.
   Premium industrial B2B minimalism — dark outer / light panel.
═══════════════════════════════════════════════════════ */

:root {
  --background: #f4f4f3;
  --surface: #ffffff;
  --industrial-dark: #20201d;
  --graphite: #2f2f2b;
  --concrete: #f4f4f3;
  --steel: #d8d5ce;
  --text-primary: #2f2f2b;
  --text-secondary: #68645d;
  --text-tertiary: #9b9790;
  --accent: #1f6feb;
  --accent-hover: #3b82f6;
  --accent-soft: rgba(31, 111, 235, 0.18);
  --accent-border: rgba(31, 111, 235, 0.28);
  --accent-glow: rgba(31, 111, 235, 0.22);
  --border: #d8d5ce;
  --border-light: rgba(47, 47, 43, 0.08);
  --link: #1f6feb;
  --radius-none: 0px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --font-heading: 'Space Grotesk', 'Archivo', 'Inter Tight', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', monospace;
  --shadow-accent: 0 0 28px rgba(31, 111, 235, 0.22);
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --max-w: 1120px;
  --article-w: 720px;
  --nav-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  background: var(--industrial-dark);
  color: var(--text-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 18% 22%, rgba(31, 111, 235, 0.18), transparent 26%),
    radial-gradient(circle at 82% 14%, rgba(215, 255, 47, 0.06), transparent 22%);
  background-size:
    48px 48px,
    48px 48px,
    auto,
    auto;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.1'/%3E%3C/svg%3E");
  opacity: 0.32;
  mix-blend-mode: soft-light;
}

.page {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ═══════════════════════════════════════════════════════
   NAVIGATION
═══════════════════════════════════════════════════════ */
.nav {
  position: relative;
  z-index: 100;
  width: 100%;
  padding: 0 var(--space-6);
  color: var(--concrete);
}

.nav-inner {
  max-width: var(--max-w);
  height: var(--nav-h);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(244, 244, 243, 0.16);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: var(--concrete);
  color: var(--graphite);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  clip-path: polygon(7px 0%, 100% 0%, calc(100% - 7px) 100%, 0% 100%);
}

.logo-wordmark {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--concrete);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-link {
  position: relative;
  padding: var(--space-2) var(--space-4);
  font-size: 0.86rem;
  font-weight: 700;
  color: rgba(244, 244, 243, 0.68);
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link[aria-current] {
  color: var(--concrete);
}

.nav-link[aria-current]::after {
  content: '';
  position: absolute;
  left: var(--space-4);
  right: var(--space-4);
  bottom: 2px;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 18px var(--accent-glow);
}

.nav-cta {
  display: inline-block;
  margin-left: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--surface);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-none);
  transition:
    background var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-base);
}

.nav-cta:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
}

.nav a:focus-visible,
.footer a:focus-visible,
.breadcrumbs a:focus-visible,
.related-card:focus-within,
.back-link:focus-visible,
.article-body a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ═══════════════════════════════════════════════════════
   CONTENT SHELL
═══════════════════════════════════════════════════════ */
.article-main {
  flex: 1;
  padding: var(--space-7) var(--space-6) var(--space-8);
}

.content-shell {
  max-width: var(--max-w);
  margin: 0 auto;
  background:
    linear-gradient(135deg, rgba(31, 111, 235, 0.08), transparent 26%),
    linear-gradient(90deg, rgba(47, 47, 43, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(47, 47, 43, 0.04) 1px, transparent 1px), var(--concrete);
  background-size:
    auto,
    36px 36px,
    36px 36px,
    auto;
  border: 1px solid rgba(244, 244, 243, 0.14);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

/* ── Hero ───────────────────────────────────────────── */
.article-hero {
  position: relative;
  padding: clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.06'/%3E%3C/svg%3E");
  opacity: 0.7;
}

.article-hero > * {
  position: relative;
  z-index: 1;
}

.breadcrumbs {
  margin-bottom: var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.breadcrumbs li + li::before {
  content: '/';
  margin-right: var(--space-2);
  color: var(--text-tertiary);
}

.breadcrumbs a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--accent);
}

.breadcrumbs [aria-current='page'] {
  color: var(--text-primary);
  font-weight: 700;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 16px var(--accent-glow);
}

.article-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  max-width: 820px;
}

.lead {
  margin-top: var(--space-5);
  max-width: 760px;
  font-size: clamp(1.05rem, 1.6vw, 1.18rem);
  line-height: 1.65;
  color: var(--text-secondary);
}

.meta-row {
  list-style: none;
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

.meta-label {
  display: block;
  margin-bottom: 2px;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

/* ── Body ───────────────────────────────────────────── */
.article-body {
  max-width: var(--article-w);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) clamp(24px, 5vw, 56px);
}

.article-body section + section,
.article-body section + .faq,
.article-body .faq + .article-disclaimer,
.article-body section + .article-disclaimer {
  margin-top: var(--space-7);
}

.article-body h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  scroll-margin-top: var(--space-6);
}

.article-body h3 {
  margin-top: var(--space-5);
  font-family: var(--font-heading);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.article-body p {
  margin-top: var(--space-4);
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.78;
}

.article-body ul,
.article-body ol {
  margin-top: var(--space-4);
  padding-left: var(--space-5);
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
}

.article-body li {
  margin-top: var(--space-2);
}
.article-body li::marker {
  color: var(--accent);
}

.article-body a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-border);
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.article-body a:hover {
  color: var(--accent-hover);
  border-bottom-color: var(--accent);
}

.article-body strong {
  color: var(--text-primary);
  font-weight: 700;
}

/* ── FAQ ────────────────────────────────────────────── */
.faq {
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.faq h2 {
  margin-bottom: var(--space-5);
}

.faq-item + .faq-item {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-light);
}

.faq-item h3 {
  margin-top: 0;
}

/* ── Disclaimer ─────────────────────────────────────── */
.article-disclaimer {
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px dashed var(--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--text-tertiary);
}

/* ── Related ────────────────────────────────────────── */
.related-section {
  padding: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, rgba(31, 111, 235, 0.04));
}

.kicker {
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.related-section h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.related-grid {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.related-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--border);
  transition:
    transform var(--transition-base),
    border-color var(--transition-fast),
    box-shadow var(--transition-base);
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-border);
  box-shadow: 0 18px 40px rgba(31, 111, 235, 0.1);
}

.related-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 42px;
  height: 42px;
  background: linear-gradient(
    135deg,
    transparent 0 48%,
    rgba(31, 111, 235, 0.4) 48% 51%,
    transparent 51%
  );
}

.related-category {
  display: inline-block;
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.related-card h3 {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.related-card p {
  margin-top: var(--space-3);
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

.related-read {
  margin-top: var(--space-5);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.86rem;
  color: var(--accent);
}

.back-link {
  display: inline-block;
  margin-top: var(--space-6);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.6);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.86rem;
  color: var(--text-secondary);
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast);
}

.back-link:hover {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-soft);
}

/* ═══════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════ */
.footer {
  padding: 0 var(--space-6) var(--space-6);
  color: var(--concrete);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-top: var(--space-5);
  border-top: 1px solid rgba(244, 244, 243, 0.16);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.footer-copy {
  font-size: 0.8rem;
  color: rgba(244, 244, 243, 0.56);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-1);
}

.footer-links a {
  padding: var(--space-2) var(--space-3);
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(244, 244, 243, 0.58);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--concrete);
}

/* ═══════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════ */
@media (max-width: 720px) {
  .nav,
  .article-main,
  .footer {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .nav-inner {
    height: 60px;
  }
  .logo-wordmark {
    display: none;
  }
  .nav-link {
    padding: var(--space-2) var(--space-3);
    font-size: 0.82rem;
  }
  .nav-cta {
    padding: var(--space-2) var(--space-3);
    font-size: 0.78rem;
  }

  .article-main {
    padding-top: var(--space-5);
    padding-bottom: var(--space-7);
  }

  .article-hero {
    padding: var(--space-5);
  }

  .article-body {
    padding: var(--space-5);
  }

  .article-hero h1 {
    font-size: clamp(2rem, 9vw, 2.6rem);
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }
}