/* ============================================================
   FIELD-NOTES — shared article template CSS
   Editorial article register for cmprssn-v4.
   Imports tokens from cmprssn-tokens.css.
   ============================================================ */

/* ---- Sticky article nav ---- */
.article-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 245, 236, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.article-nav .wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.article-nav a {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: color 180ms ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.article-nav a:hover { color: var(--ink); }
.article-nav nav.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 32px);
}
.article-nav nav.nav-links a {
  font-family: var(--font-text);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
  position: relative;
  padding-bottom: 4px;
  transition: color 200ms ease;
}
.article-nav nav.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 360ms cubic-bezier(0.2,0.8,0.2,1);
}
.article-nav nav.nav-links a:hover::after,
.article-nav nav.nav-links a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}
@media (max-width: 640px) {
  .article-nav nav.nav-links { gap: 14px; }
  .article-nav nav.nav-links a { font-size: 13px; }
  .article-nav .home .mark-text { display: none; }
}
.article-nav .home {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}
.article-nav .home svg { display: block; }
.article-nav .home .mark-text {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

/* ---- Hero image — full bleed left + right ---- */
.article-hero {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 7;
  max-height: 520px;
  overflow: hidden;
  background: var(--bg-elev-2);
  margin: 0 0 clamp(48px, 6vw, 80px);
}
.article-hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.72;
  mix-blend-mode: multiply;
  filter: grayscale(1) sepia(0.22) contrast(1.04);
}
.article-hero::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 30%;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}
.article-hero-caption {
  position: absolute;
  left: var(--pad-x);
  bottom: 28px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  mix-blend-mode: difference;
}
.article-hero-caption .rule {
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}
@media (max-width: 720px) {
  .article-hero { aspect-ratio: 4 / 3; max-height: 360px; }
}

/* ---- Article header ---- */
.article-header {
  max-width: calc(700px + 2 * var(--pad-x));
  margin: 0 auto;
  padding: 0 var(--pad-x) clamp(48px, 6vw, 80px);
}
.article-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: 28px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.article-eyebrow .rule {
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--accent);
}
.article-h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(36px, 5.4vw, 64px);
  letter-spacing: -0.02em;
  line-height: 1.06;
  margin: 0 0 24px;
  color: var(--ink);
  max-width: 700px;
}
.article-h1 em {
  font-style: italic;
  font-weight: 500;
  color: var(--accent);
}
.article-dek {
  font-family: var(--font-text);
  font-style: normal;
  font-weight: 300;
  font-size: clamp(17px, 1.45vw, 20px);
  line-height: 1.55;
  color: var(--fg-muted);
  letter-spacing: 0;
  margin: 0 0 40px;
  max-width: 700px;
}

/* ---- Byline ---- */
.byline {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.byline-avatar {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  background: var(--bg-elev-2);
  background-image: var(--avatar-url, none);
  background-size: cover;
  background-position: center;
  flex: 0 0 44px;
  border: 1px solid var(--line);
  /* Hide the "RVS" placeholder text — the background-image is the canonical avatar.
     Keeping the text in the DOM as aria-hidden for screen-reader-less fallback,
     but visually it must not overlap the photo. */
  font-size: 0;
  color: transparent;
}
.byline-meta { flex: 1; min-width: 0; }
.byline-name {
  font-family: var(--font-text);
  font-weight: 500;
  font-size: 15px;
  color: var(--ink);
  line-height: 1.3;
}
.byline-role {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-top: 4px;
}
.byline-date {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  text-align: right;
  line-height: 1.6;
}
.byline-date .read {
  display: block;
  color: var(--fg-muted);
}

/* ---- Article body ---- */
.article-body {
  max-width: calc(700px + 2 * var(--pad-x));
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.article-body > * { max-width: 700px; }
.article-body > .pullquote,
.article-body > .pullquote * { max-width: none; }

.article-body p {
  font-family: var(--font-text);
  font-weight: 400;
  font-size: clamp(17px, 1.3vw, 19px);
  line-height: 1.7;
  color: var(--ink);
  margin: 0 0 24px;
}
.article-body p em { font-style: italic; color: var(--ink); }
.article-body p em.term {
  font-style: italic;
  color: var(--accent);
  font-weight: 500;
}

.article-body h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(24px, 3vw, 34px);
  letter-spacing: -0.018em;
  line-height: 1.18;
  color: var(--ink);
  margin: 64px 0 24px;
  max-width: 28ch;
}
.article-body h2 em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}
.article-body h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(20px, 2vw, 24px);
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--ink);
  margin: 48px 0 16px;
}

.article-body p.lede {
  font-size: clamp(19px, 1.5vw, 22px);
  line-height: 1.55;
  margin-bottom: 32px;
  color: var(--ink);
}

.article-body ol, .article-body ul {
  margin: 0 0 24px;
  padding-left: 22px;
  max-width: 640px;
}
.article-body ol li, .article-body ul li {
  margin-bottom: 10px;
  line-height: 1.7;
  font-size: clamp(17px, 1.3vw, 19px);
  color: var(--ink);
}

.pullquote {
  margin: 56px auto;
  padding: 16px 0 16px 28px;
  border-left: 2px solid var(--accent);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--ink);
  max-width: 660px;
}

.article-body p .refrain {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  color: var(--accent);
}

/* Inline cross-link */
.article-body a.xlink {
  color: var(--ink);
  border-bottom: 1px solid var(--accent);
  font-weight: 500;
  transition: color 180ms ease;
}
.article-body a.xlink:hover { color: var(--accent); }

/* Diagnostic list (Article 02 — three diagnostic questions) */
.diagnostic {
  margin: 40px 0;
  padding: 0;
  list-style: none;
  counter-reset: diagnostic;
  max-width: 640px;
}
.diagnostic li {
  counter-increment: diagnostic;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  align-items: start;
}
.diagnostic li::before {
  content: counter(diagnostic, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--accent);
  line-height: 1.5;
}
.diagnostic li p:first-child {
  margin-bottom: 8px;
  font-weight: 500;
}
.diagnostic li p { margin-bottom: 12px; }
.diagnostic li p:last-child { margin-bottom: 0; }

/* ============================================================
   ARTICLE FOOTER — full-bleed dark CTA band
   ============================================================ */
.article-footer {
  margin-top: clamp(96px, 12vw, 160px);
  border-top: 1px solid var(--line-strong);
}
.article-footer .footer-top {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(40px, 5vw, 56px) var(--pad-x) clamp(24px, 3vw, 40px);
}
.article-footer .footer-bottom {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(40px, 5vw, 56px) var(--pad-x) clamp(48px, 6vw, 80px);
}

.substack-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  display: flex;
  align-items: center;
  gap: 12px;
}
.substack-note .rule {
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--line-strong);
}
.substack-note a {
  color: var(--ink);
  border-bottom: 1px solid var(--line-strong);
  transition: border-color 180ms ease, color 180ms ease;
}
.substack-note a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Full-bleed dark band — escapes any wrap; content inside is constrained */
.article-cta {
  background: var(--ink);
  color: var(--bg);
  margin: 0;
  padding: clamp(56px, 7vw, 112px) 0;
}
.article-cta-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: end;
}
@media (min-width: 720px) {
  .article-cta-content {
    grid-template-columns: 8fr 4fr;
    gap: 40px;
  }
}
.article-cta .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(248, 245, 236, 0.5);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.article-cta .eyebrow .rule {
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--accent);
}
.article-cta h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(22px, 2.6vw, 34px);
  letter-spacing: -0.018em;
  line-height: 1.18;
  color: var(--bg);
  margin: 0 0 16px;
  max-width: 26ch;
}
.article-cta h3 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 500;
}
.article-cta p {
  font-family: var(--font-text);
  font-size: 15px;
  line-height: 1.6;
  color: rgba(248, 245, 236, 0.72);
  margin: 0;
  max-width: 48ch;
}
.article-cta .ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: end;
  justify-content: flex-end;
}

/* CTAs (.cta-amber-on-dark, etc) live in cmprssn-tokens.css.
   See design.md → Components → CTAs */

/* Next/previous article — sits directly after article body, before the dark CTA band */
.next-article-block {
  max-width: 720px;
  margin: clamp(56px, 7vw, 96px) auto 0;
  padding: clamp(32px, 4vw, 48px) var(--pad-x) 0;
  border-top: 1px solid var(--line);
}

.next-article {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}
.next-article .label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-subtle);
}
.next-article a {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.2;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  transition: color 180ms ease;
}
.next-article a:hover { color: var(--accent); }
.next-article a::after {
  content: '  →';
  font-style: normal;
}

/* ---- Reveal animations ---- */
.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 600ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}