/* ============================================================
   Newsletter Archive — showcase + grid layout
   Used by /writing/newsletter/system-layer/ and /human-layer/
   Variant accents are driven by CSS variables on .nl-archive.
   ============================================================ */

.nl-archive {
  --nl-accent: #2563eb;
  --nl-accent-2: #38bdf8;
  --nl-accent-ink: #1d4ed8;
  --nl-surface: rgba(255, 255, 255, 0.9);
  --nl-surface-2: rgba(255, 255, 255, 0.7);
  --nl-border: rgba(22, 19, 17, 0.08);
  --nl-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
  --nl-shadow-hover: 0 26px 60px rgba(15, 23, 42, 0.12);
  width: min(100%, 1180px);
  margin: 0 auto;
}

.nl-archive--systems {
  --nl-accent: #2563eb;
  --nl-accent-2: #38bdf8;
  --nl-accent-ink: #1d4ed8;
}

.nl-archive--human {
  --nl-accent: #b45309;
  --nl-accent-2: #f59e0b;
  --nl-accent-ink: #92400e;
}

/* ---------- Masthead ---------- */
.nl-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 4vw, 3rem);
  border: 1px solid var(--nl-border);
  border-radius: 30px;
  background:
    radial-gradient(120% 140% at 0% 0%, color-mix(in srgb, var(--nl-accent) 10%, transparent), transparent 55%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.8));
  box-shadow: var(--nl-shadow);
  margin-bottom: 2.5rem;
}
.nl-hero::before {
  content: "";
  position: absolute;
  inset: auto -6rem -8rem auto;
  width: 22rem;
  height: 22rem;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--nl-accent) 16%, transparent), transparent 68%);
  pointer-events: none;
}
.nl-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nl-accent);
  margin-bottom: 0.85rem;
}
.nl-hero__kicker::before {
  content: "";
  width: 1.6rem;
  height: 2px;
  border-radius: 2px;
  background: var(--nl-accent);
}
.nl-hero__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display, 'Playfair Display', Georgia, serif);
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--nl-accent);
}
.nl-archive--human .nl-hero__title {
  font-family: var(--font-human, 'Cormorant Garamond', Georgia, serif);
  letter-spacing: -0.02em;
}
.nl-hero__tagline {
  margin: 0 0 1.3rem;
  max-width: 48rem;
  font-family: var(--font-body, 'Source Serif Pro', Georgia, serif);
  font-style: italic;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--text-muted, #57534e);
}
.nl-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}
.nl-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--nl-border);
  background: rgba(255, 255, 255, 0.7);
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted, #57534e);
}
.nl-chip strong { color: var(--nl-accent); font-weight: 700; }
.nl-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
}
.nl-subscribe {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.78rem 1.5rem;
  border-radius: 999px;
  background: var(--nl-accent);
  color: #fff !important;
  font-family: var(--font-ui, 'Inter', sans-serif);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none !important;
  box-shadow: 0 12px 26px color-mix(in srgb, var(--nl-accent) 28%, transparent);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.nl-subscribe:hover {
  transform: translateY(-2px);
  background: var(--nl-accent-ink);
  box-shadow: 0 16px 34px color-mix(in srgb, var(--nl-accent) 36%, transparent);
}
.nl-switch {
  font-family: var(--font-ui, 'Inter', sans-serif);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--nl-accent) !important;
  text-decoration: none !important;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.nl-switch:hover { border-bottom-color: var(--nl-accent); }

/* ---------- Section label ---------- */
.nl-section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.25rem;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted, #78716c);
}
.nl-section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--nl-border), transparent);
}

/* ---------- Showcase (latest issue) ---------- */
.nl-showcase {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 0;
  border: 1px solid var(--nl-border);
  border-radius: 28px;
  overflow: hidden;
  background: var(--nl-surface);
  box-shadow: var(--nl-shadow);
  text-decoration: none !important;
  color: inherit;
  margin-bottom: 3rem;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.28s, border-color 0.28s;
}
.nl-showcase:hover {
  transform: translateY(-4px);
  box-shadow: var(--nl-shadow-hover);
  border-color: color-mix(in srgb, var(--nl-accent) 35%, var(--nl-border));
}
.nl-showcase__media {
  position: relative;
  min-height: 320px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--nl-accent) 22%, #0b1220), #0b1220);
  overflow: hidden;
}
.nl-showcase__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.nl-showcase:hover .nl-showcase__media img { transform: scale(1.04); }
.nl-showcase__badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  background: rgba(12, 10, 9, 0.7);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: #fff;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nl-showcase__badge::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--nl-accent-2);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--nl-accent-2) 60%, transparent);
  animation: nlPulse 2.4s ease-out infinite;
}
@keyframes nlPulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--nl-accent-2) 55%, transparent); }
  70% { box-shadow: 0 0 0 0.5rem transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
.nl-showcase__body {
  padding: clamp(1.5rem, 3vw, 2.5rem);
  display: flex;
  flex-direction: column;
}
.nl-showcase__eyebrow {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--nl-accent);
  margin-bottom: 0.6rem;
}
.nl-showcase__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display, 'Playfair Display', Georgia, serif);
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--text-color, #1c1917);
}
.nl-showcase__subtitle {
  margin: 0 0 0.9rem;
  font-family: var(--font-body, 'Source Serif Pro', Georgia, serif);
  font-style: italic;
  font-size: 1.02rem;
  line-height: 1.55;
  color: var(--nl-accent-ink);
}
.nl-showcase__excerpt {
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--text-muted, #57534e);
}
.nl-showcase__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: auto;
  padding-top: 1.1rem;
  border-top: 1px solid var(--nl-border);
}
.nl-showcase__date {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--text-muted, #78716c);
}
.nl-showcase__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-ui, 'Inter', sans-serif);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--nl-accent);
}
.nl-showcase:hover .nl-showcase__cta { gap: 0.7rem; }
.nl-showcase__cta { transition: gap 0.2s; }

/* ---------- Grid ---------- */
.nl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.4rem;
}
.nl-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--nl-border);
  border-radius: 22px;
  overflow: hidden;
  background: var(--nl-surface);
  box-shadow: var(--nl-shadow);
  text-decoration: none !important;
  color: inherit;
  transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.24s, border-color 0.24s;
}
.nl-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--nl-shadow-hover);
  border-color: color-mix(in srgb, var(--nl-accent) 35%, var(--nl-border));
}
.nl-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, color-mix(in srgb, var(--nl-accent) 18%, #0b1220), #0b1220);
}
.nl-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.nl-card:hover .nl-card__media img { transform: scale(1.05); }
.nl-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.25rem 1.35rem 1.4rem;
}
.nl-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}
.nl-card__badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--nl-accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--nl-accent) 22%, transparent);
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--nl-accent);
}
.nl-card__date {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.7rem;
  color: var(--text-muted, #a8a29e);
}
.nl-card__title {
  margin: 0 0 0.45rem;
  font-family: var(--font-display, 'Playfair Display', Georgia, serif);
  font-size: 1.18rem;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--text-color, #1c1917);
}
.nl-card__subtitle {
  margin: 0 0 1rem;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-muted, #57534e);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.nl-card__link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-ui, 'Inter', sans-serif);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--nl-accent);
  transition: gap 0.2s;
}
.nl-card:hover .nl-card__link { gap: 0.7rem; }

/* ---------- About strip ---------- */
.nl-about {
  max-width: 52rem;
  margin: 0 0 2.5rem;
  padding: 1.4rem 0 0;
}
.nl-about h3 {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--nl-accent);
  margin: 0 0 0.6rem;
}
.nl-about p { font-size: 0.94rem; line-height: 1.72; color: var(--text-muted, #78716c); margin: 0 0 0.6rem; }
.nl-about a { color: var(--nl-accent); font-weight: 600; text-decoration: none; }
.nl-about a:hover { text-decoration: underline; }

/* ---------- Dark mode ---------- */
[data-theme=dark] .nl-archive {
  --nl-surface: rgba(28, 25, 23, 0.92);
  --nl-surface-2: rgba(28, 25, 23, 0.8);
  --nl-border: rgba(231, 229, 228, 0.1);
  --nl-shadow: 0 14px 38px rgba(0, 0, 0, 0.4);
  --nl-shadow-hover: 0 26px 60px rgba(0, 0, 0, 0.55);
}
[data-theme=dark] .nl-archive--systems { --nl-accent: #60a5fa; --nl-accent-ink: #93c5fd; }
[data-theme=dark] .nl-archive--human { --nl-accent: #f59e0b; --nl-accent-ink: #fbbf24; }
[data-theme=dark] .nl-hero {
  background:
    radial-gradient(120% 140% at 0% 0%, color-mix(in srgb, var(--nl-accent) 14%, transparent), transparent 55%),
    linear-gradient(180deg, rgba(28, 25, 23, 0.95), rgba(20, 18, 16, 0.9));
}
[data-theme=dark] .nl-chip { background: rgba(231, 229, 228, 0.05); }
[data-theme=dark] .nl-showcase__title,
[data-theme=dark] .nl-card__title { color: #e7e5e4; }
[data-theme=dark] .nl-showcase__excerpt,
[data-theme=dark] .nl-showcase__date,
[data-theme=dark] .nl-card__subtitle { color: #a8a29e; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .nl-showcase { grid-template-columns: 1fr; }
  .nl-showcase__media { min-height: 200px; aspect-ratio: 16 / 9; }
}
@media (max-width: 560px) {
  .nl-grid { grid-template-columns: 1fr; }
  .nl-hero { border-radius: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  .nl-showcase, .nl-card, .nl-showcase__media img, .nl-card__media img,
  .nl-subscribe, .nl-showcase__cta, .nl-card__link { transition: none !important; }
  .nl-showcase:hover, .nl-card:hover { transform: none; }
  .nl-showcase__badge::before { animation: none; }
}