/* Article page styles — extends styles.css */

.article-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  background: rgba(247, 246, 242, 0.88);
  border-bottom: 1px solid var(--hairline);
}
.article-nav .nav-inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.article-nav .logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 18px;
  color: var(--ink);
}
.article-nav .logo svg {
  width: 26px;
  height: 26px;
  color: var(--navy);
}
.article-nav .logo svg .lm-spark { color: var(--accent); }
.article-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.article-nav-links a {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.article-nav-links a:hover { color: var(--ink); background: rgba(14, 26, 51, 0.05); }
.article-nav-links a.active { color: var(--ink); }
.article-nav .nav-cta {
  font-size: 14px !important;
  padding: 10px 18px !important;
}
@media (max-width: 880px) {
  .article-nav-links { display: none; }
}

/* Article header */

.article-header {
  background: var(--navy);
  color: white;
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(48px, 6vw, 72px);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.article-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.06) 1px, transparent 0);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 80% 60% at 30% 50%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 30% 50%, black, transparent 80%);
  pointer-events: none;
  z-index: 0;
}
.article-header::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  max-width: 700px;
  max-height: 700px;
  background: radial-gradient(circle, rgba(53,89,224,0.4) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.article-header-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 14px 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  transition: background 0.15s ease, color 0.15s ease;
  margin-bottom: 28px;
}
.back-link:hover { background: rgba(255,255,255,0.08); color: white; }
.back-link svg { width: 14px; height: 14px; }

.article-category {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #B6C8FF;
  margin-bottom: 18px;
}
.article-category::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}

.article-header h1 {
  font-size: clamp(34px, 4.8vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 22px;
  font-weight: 400;
  text-wrap: balance;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.04em;
}
.article-meta-dot { width: 4px; height: 4px; background: currentColor; border-radius: 50%; opacity: 0.5; }
.article-meta strong { color: rgba(255,255,255,0.85); font-weight: 500; font-family: var(--font); letter-spacing: 0; }

/* Article body */

.article-body {
  padding-top: clamp(48px, 6vw, 80px);
  padding-bottom: clamp(48px, 6vw, 88px);
}
.article-body-inner {
  max-width: 720px;
  margin: 0 auto;
}
.article-body p,
.article-body ul,
.article-body ol {
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink);
  margin: 0 0 22px;
  text-wrap: pretty;
}
.article-body p.lead {
  font-size: 22px;
  line-height: 1.55;
  color: var(--ink);
  margin-bottom: 32px;
  letter-spacing: -0.005em;
}
.article-body h2 {
  font-size: clamp(24px, 2.4vw, 30px);
  font-weight: 400;
  letter-spacing: -0.018em;
  line-height: 1.2;
  margin: 44px 0 16px;
  text-wrap: balance;
  color: var(--ink);
}
.article-body h3 {
  font-size: 20px;
  font-weight: 400;
  letter-spacing: -0.012em;
  margin: 32px 0 12px;
  color: var(--ink);
}
.article-body ul, .article-body ol {
  padding-left: 22px;
}
.article-body li {
  margin-bottom: 10px;
  padding-left: 6px;
}
.article-body li::marker { color: var(--accent); }
.article-body strong { font-weight: 600; color: var(--ink); }
.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.article-body a:hover { text-decoration-thickness: 2px; }

.article-body blockquote {
  margin: 32px 0;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--accent);
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: 24px;
  line-height: 1.4;
  color: var(--ink);
}

.article-body hr {
  border: none;
  height: 1px;
  background: var(--hairline);
  margin: 40px 0;
}

/* End-of-article CTA */

.article-cta {
  margin-top: 56px;
  background: var(--navy);
  color: white;
  border-radius: var(--radius-lg);
  padding: clamp(36px, 5vw, 56px) clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1.5fr auto;
  gap: 32px;
  align-items: center;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.article-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.07) 1px, transparent 0);
  background-size: 22px 22px;
  mask-image: radial-gradient(ellipse 60% 80% at 90% 50%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 60% 80% at 90% 50%, black, transparent 80%);
  z-index: 0;
}
.article-cta > * { position: relative; z-index: 1; }
.article-cta h2 {
  margin: 0 0 8px;
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.15;
  text-wrap: balance;
  color: white;
}
.article-cta p {
  margin: 0;
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  max-width: 480px;
}
.article-cta-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: stretch;
}
@media (max-width: 720px) {
  .article-cta { grid-template-columns: 1fr; }
  .article-cta-actions { flex-direction: row; flex-wrap: wrap; }
}

/* "Keep reading" cross-links */

.keep-reading {
  margin-top: 56px;
  border-top: 1px solid var(--hairline);
  padding-top: 36px;
}
.keep-reading h3 {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 18px;
  font-weight: 500;
}
.keep-reading-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.keep-reading-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 22px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  background: var(--surface);
  transition: border-color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}
.keep-reading-card:hover {
  border-color: var(--hairline-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.keep-reading-card .kr-cat {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.keep-reading-card .kr-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.3;
}
@media (max-width: 680px) { .keep-reading-grid { grid-template-columns: 1fr; } }