/* ============================================================
   Frontier AI Weekly — Edition 5 — Dual-Use Ledger
   Apr 19, 2026 | Ink sea · mint telemetry · amber dual-use
   ============================================================ */

:root {
  --bg-primary: #06161a;
  --bg-secondary: #0a2228;
  --bg-surface: #0d2e36;
  --bg-elevated: #123a44;
  --text-primary: #e6f4f1;
  --text-secondary: #8fb8b0;
  --text-muted: #5a7d78;

  --accent-violet: #8b5cf6;
  --accent-violet-dim: rgba(139, 92, 246, 0.14);
  --accent-blue: #38bdf8;
  --accent-green: #2ee59d;
  --accent-amber: #fbbf24;
  --accent-mint: #5ef3c8;

  --glass: rgba(255, 255, 255, 0.035);
  --glass-border: rgba(94, 243, 200, 0.12);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-display: 'Syne', 'Inter', sans-serif;

  --ticker-h: 48px;
  --edge: clamp(1rem, 4vw, 3rem);
  --max: 1180px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  padding-top: calc(var(--ticker-h) + env(safe-area-inset-top, 0px));
  overflow-x: hidden;
  min-height: 100vh;
  min-height: 100dvh;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.78' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.038'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.75;
}

.is-visible { opacity: 1 !important; transform: none !important; }

/* ─── Ticker (CSS only) ─────────────────────────────────── */
.ticker-strip {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--ticker-h);
  z-index: 200;
  background: rgba(6, 22, 26, 0.94);
  backdrop-filter: blur(18px) saturate(1.15);
  border-bottom: 1px solid rgba(94, 243, 200, 0.18);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.ticker-track {
  display: flex;
  width: max-content;
  animation: ticker-marquee 58s linear infinite;
}

@keyframes ticker-marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.ticker-content {
  display: flex;
  align-items: center;
  white-space: nowrap;
  padding: 0 1.25rem;
  gap: 0.35rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.ticker-label {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-mint);
  letter-spacing: 0.02em;
  margin-right: 0.35rem;
}

.ticker-divider { color: var(--text-muted); padding: 0 0.35rem; }

@media (prefers-reduced-motion: reduce) {
  .ticker-track { animation: none; }
}

/* ─── Page shell ────────────────────────────────────────── */
.fw-page { position: relative; z-index: 1; }

.source {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.35rem 0;
  margin-right: 1.25rem;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px dashed rgba(94, 243, 200, 0.25);
  transition: color 0.2s var(--ease-out-expo), border-color 0.2s;
}
.source:hover, .source:focus-visible {
  color: var(--accent-mint);
  border-bottom-color: var(--accent-mint);
  outline: none;
}

/* ─── Hero ───────────────────────────────────────────────── */
.fw-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  padding: clamp(4rem, 12vh, 7rem) var(--edge) clamp(3rem, 8vh, 5rem);
  overflow: hidden;
}

.fw-hero__grid {
  position: absolute;
  inset: -10% -5%;
  background:
    radial-gradient(ellipse 70% 50% at 20% 0%, rgba(94, 243, 200, 0.12), transparent 55%),
    linear-gradient(105deg, rgba(139, 92, 246, 0.08) 0%, transparent 42%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 47px,
      rgba(255, 255, 255, 0.03) 47px,
      rgba(255, 255, 255, 0.03) 48px
    );
  opacity: 0.85;
  pointer-events: none;
}

.fw-hero__halo {
  position: absolute;
  width: min(90vw, 640px);
  height: min(90vw, 640px);
  right: -12%;
  top: 8%;
  background: radial-gradient(circle, rgba(94, 243, 200, 0.22) 0%, transparent 62%);
  filter: blur(4px);
  pointer-events: none;
  opacity: 0.35;
}

.fw-hero__inner {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
}

.fw-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-mint);
  border: 1px solid var(--glass-border);
  background: var(--glass);
  backdrop-filter: blur(12px);
  padding: 0.55rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.fw-hero__eyebrow {
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 36ch;
  margin-bottom: 1rem;
}

.fw-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 7.5vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  max-width: 14ch;
}

.fw-hero__title span { display: block; }
.fw-hero__title span:nth-child(2) { color: var(--accent-mint); }

.fw-hero__deck {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin: 1.75rem 0 1rem;
}
@media (min-width: 720px) {
  .fw-hero__deck {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }
}

.fw-hero__lead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 56ch;
}

.fw-hero__stat-stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.fw-stat-card {
  border-radius: 14px;
  border: 1px solid var(--glass-border);
  background: rgba(18, 58, 68, 0.45);
  backdrop-filter: blur(14px);
  padding: 1rem 1.15rem;
}

.fw-stat-card__k {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.fw-stat-card__v {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  color: var(--text-primary);
  margin-top: 0.2rem;
}
.fw-stat-card__v--mint { color: var(--accent-mint); }
.fw-stat-card__note {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  line-height: 1.45;
}

/* ─── Sections base ─────────────────────────────────────── */
.fw-section {
  padding: clamp(3rem, 8vw, 5.5rem) var(--edge);
  position: relative;
}

.fw-section:nth-child(even) { background: linear-gradient(180deg, transparent, rgba(10, 34, 40, 0.55)); }

.fw-section__inner {
  max-width: var(--max);
  margin: 0 auto;
}

.fw-kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-amber);
  margin-bottom: 0.75rem;
}

.fw-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.65rem, 4.2vw, 2.45rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  max-width: 22ch;
}

.fw-lead {
  font-size: clamp(1rem, 2vw, 1.12rem);
  color: var(--text-secondary);
  max-width: 68ch;
  margin-bottom: 1.5rem;
}

.fw-aside {
  font-size: 0.88rem;
  color: var(--text-muted);
  border-left: 3px solid rgba(251, 191, 36, 0.35);
  padding-left: 1rem;
  margin: 1rem 0 1.25rem;
  max-width: 62ch;
}

code.inline {
  font-family: var(--font-mono);
  font-size: 0.84em;
  background: rgba(0, 0, 0, 0.25);
  padding: 0.12em 0.35em;
  border-radius: 6px;
}

/* ─── Layout primitives (rotate grammar) ──────────────── */
.fw-panel {
  border-radius: 18px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  backdrop-filter: blur(16px);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  margin: 1.25rem 0;
}

.fw-split {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.25rem;
}
@media (min-width: 840px) {
  .fw-split--55 { grid-template-columns: 1.1fr 0.9fr; align-items: start; }
  .fw-split--46 { grid-template-columns: 0.95fr 1.05fr; align-items: start; }
}

.fw-mosaic {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0;
}
@media (min-width: 640px) {
  .fw-mosaic {
    grid-template-columns: repeat(3, 1fr);
  }
  .fw-mosaic__cell--wide { grid-column: span 2; }
}

.fw-mosaic__cell {
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(13, 46, 54, 0.55);
  padding: 1rem 1.1rem;
  min-height: 44px;
}

.fw-mosaic__cell h3 {
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}
.fw-mosaic__cell p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.fw-band {
  margin: 1.5rem 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(94, 243, 200, 0.15);
}

.fw-band__row {
  display: grid;
  grid-template-columns: minmax(88px, 0.28fr) 1fr;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  align-items: baseline;
}
.fw-band__row:last-child { border-bottom: 0; }
.fw-band__mono {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-mint);
}

.fw-timeline {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0;
  position: relative;
  padding-left: 1.25rem;
}
.fw-timeline::before {
  content: '';
  position: absolute;
  left: 0.35rem;
  top: 0.25rem;
  bottom: 0.25rem;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-mint), rgba(139, 92, 246, 0.35));
}

.fw-timeline__node {
  position: relative;
  padding-left: 0.5rem;
}
.fw-timeline__node::before {
  content: '';
  position: absolute;
  left: -1rem;
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent-mint);
}

.fw-timeline__date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-amber);
  margin-bottom: 0.25rem;
}

.fw-quote-block {
  margin: 1.5rem 0;
  padding: 1.25rem 1.35rem;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(94, 243, 200, 0.06));
  border: 1px solid rgba(139, 92, 246, 0.22);
}
.fw-quote-block blockquote {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--text-primary);
  font-style: italic;
}
.fw-quote-block cite {
  display: block;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: normal;
}

.fw-grid-2 {
  display: grid;
  gap: 1rem;
  margin: 1.25rem 0;
}
@media (min-width: 720px) {
  .fw-grid-2 { grid-template-columns: 1fr 1fr; }
}

.fw-rail {
  list-style: none;
  margin: 1rem 0;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  overflow: hidden;
}
.fw-rail li {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.fw-rail li:last-child { border-bottom: 0; }
.fw-rail strong { color: var(--text-primary); }

.fw-sankey {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.65rem;
  margin: 1.5rem 0;
}

.fw-sankey__step {
  border-radius: 12px;
  padding: 0.85rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-secondary);
  border: 1px solid rgba(94, 243, 200, 0.14);
  background: rgba(6, 22, 26, 0.65);
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 140px;
}
.fw-sankey__arrow {
  display: none;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 1.1rem;
  min-width: 28px;
  min-height: 44px;
}
@media (min-width: 720px) {
  .fw-sankey { flex-wrap: nowrap; }
  .fw-sankey__arrow { display: flex; }
}

.fw-matrix-wrap { overflow-x: auto; margin: 1.25rem 0; -webkit-overflow-scrolling: touch; }
.fw-matrix {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  min-width: 280px;
}
.fw-matrix th,
.fw-matrix td {
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  text-align: left;
  vertical-align: top;
}
.fw-matrix th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-mint);
  background: rgba(0, 0, 0, 0.2);
}

.fw-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}
.fw-pill-row span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.45rem 0.65rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  background: rgba(18, 58, 68, 0.4);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.fw-contra {
  margin: 1.5rem 0;
  padding: 1.25rem;
  border-radius: 16px;
  border: 1px dashed rgba(251, 191, 36, 0.35);
  background: rgba(251, 191, 36, 0.04);
}
.fw-contra p {
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
}
.fw-contra p:last-child { margin-bottom: 0; }
.fw-contra strong { color: var(--text-primary); }

.fw-lookahead {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}
@media (min-width: 720px) {
  .fw-lookahead { grid-template-columns: repeat(2, 1fr); }
}

.fw-lookahead__card {
  border-radius: 14px;
  border: 1px solid var(--glass-border);
  background: rgba(13, 46, 54, 0.5);
  padding: 1.1rem 1.2rem;
  min-height: 44px;
}
.fw-lookahead__when {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-mint);
  margin-bottom: 0.35rem;
}
.fw-lookahead__card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}
.fw-lookahead__card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* ─── Footer ─────────────────────────────────────────────── */
.site-footer {
  padding: clamp(2.5rem, 6vw, 4rem) var(--edge);
  border-top: 1px solid rgba(94, 243, 200, 0.12);
  background: linear-gradient(180deg, rgba(6, 22, 26, 0.2), #040f12);
}

.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.site-footer__pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-violet);
  box-shadow: 0 0 0 6px var(--accent-violet-dim);
  flex-shrink: 0;
}

.site-footer__regen,
.site-footer__session,
.site-footer__timestamp {
  color: var(--text-secondary);
  font-size: 0.92rem;
  max-width: 52ch;
  margin-bottom: 0.5rem;
}

.site-footer__session {
  font-family: var(--font-mono);
  color: var(--accent-mint);
  letter-spacing: 0.04em;
}

.sn-wrap { min-height: 1px; }

@media (max-width: 360px) {
  .fw-hero__title { font-size: 2.1rem; }
}