/* ═══ Frontier AI Weekly — Sunday Edition placeholder / base tokens ═══ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #08080d;
  --bg-secondary: #0c0c14;
  --bg-surface: rgba(255, 255, 255, 0.03);
  --bg-elevated: rgba(255, 255, 255, 0.05);
  --text-primary: #eaeaf0;
  --text-secondary: #b4b4c4;
  --text-muted: #7c7c8a;
  --accent-violet: #8b5cf6;
  --accent-violet-dim: rgba(139, 92, 246, 0.14);
  --accent-blue: #3b82f6;
  --accent-blue-dim: rgba(59, 130, 246, 0.12);
  --accent-green: #17b26a;
  --accent-green-dim: rgba(23, 178, 106, 0.12);
  --neon-glow: rgba(139, 92, 246, 0.45);
  --glass: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-highlight: rgba(139, 92, 246, 0.25);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --font-display: 'Syne', var(--font-sans);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Grain */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 10000;
  pointer-events: none;
  opacity: 0.034;
  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='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ── Tech ticker ─────────────────────────────────────────── */
.ticker-strip {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  height: 46px;
  padding-top: env(safe-area-inset-top);
  background: rgba(8, 8, 13, 0.82);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid rgba(139, 92, 246, 0.15);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.ticker-track {
  display: flex;
  width: max-content;
  animation: ticker-scroll 48s linear infinite;
}

.ticker-content {
  display: flex;
  align-items: center;
  gap: 0;
  white-space: nowrap;
  padding: 0 2rem;
  font-size: 0.72rem;
}

.ticker-item {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
}

.ticker-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-violet);
  font-weight: 600;
}

.ticker-divider {
  color: rgba(255, 255, 255, 0.12);
  margin: 0 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.55rem;
}

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

/* ── Page shell ─────────────────────────────────────────── */
.sig-page {
  position: relative;
  min-height: 100dvh;
  min-height: 100vh;
  padding-top: calc(46px + env(safe-area-inset-top, 0px));
}

/* Neural field background */
.sig-neural {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(139, 92, 246, 0.14), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 60%, rgba(59, 130, 246, 0.08), transparent 50%),
    radial-gradient(ellipse 50% 35% at 0% 80%, rgba(139, 92, 246, 0.06), transparent 45%),
    var(--bg-primary);
}

.sig-neural__grid {
  position: absolute;
  inset: -20%;
  background-image:
    linear-gradient(rgba(139, 92, 246, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 0%, transparent 75%);
  animation: neural-drift 28s ease-in-out infinite alternate;
}

.sig-neural__waves {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background: repeating-linear-gradient(
    105deg,
    transparent 0,
    transparent 18px,
    rgba(59, 130, 246, 0.03) 18px,
    rgba(59, 130, 246, 0.03) 19px
  );
  animation: wave-shift 22s linear infinite;
}

@keyframes neural-drift {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-2%, 1%) rotate(0.6deg); }
}

@keyframes wave-shift {
  0% { transform: translateX(0); }
  100% { transform: translateX(-48px); }
}

.sig-neural__nodes {
  position: absolute;
  width: 140%;
  height: 140%;
  left: -20%;
  top: -20%;
  background:
    radial-gradient(circle at 22% 38%, rgba(139, 92, 246, 0.2) 0 2px, transparent 3px),
    radial-gradient(circle at 78% 22%, rgba(59, 130, 246, 0.18) 0 2px, transparent 3px),
    radial-gradient(circle at 55% 72%, rgba(139, 92, 246, 0.15) 0 2px, transparent 3px),
    radial-gradient(circle at 12% 78%, rgba(59, 130, 246, 0.12) 0 2px, transparent 3px),
    radial-gradient(circle at 88% 58%, rgba(139, 92, 246, 0.14) 0 2px, transparent 3px);
  background-size: 100% 100%;
  filter: blur(0.3px);
}

/* ── Hero ───────────────────────────────────────────────── */
.sig-hero {
  position: relative;
  z-index: 1;
  min-height: calc(100dvh - 46px - env(safe-area-inset-top, 0px));
  min-height: calc(100vh - 46px - env(safe-area-inset-top, 0px));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem 5rem;
  text-align: center;
}

.sig-hero__glow {
  position: absolute;
  width: min(90vw, 520px);
  height: min(90vw, 520px);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.22) 0%, transparent 62%);
  filter: blur(40px);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -52%);
  pointer-events: none;
  z-index: -1;
}

.sig-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-blue);
  border: 1px solid rgba(59, 130, 246, 0.35);
  background: var(--accent-blue-dim);
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1.75rem;
}

.sig-badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 12px var(--accent-green);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.92); }
}

.sig-hero__title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 14vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.95;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, #fff 0%, #ddd6fe 42%, #8b5cf6 88%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 40px rgba(139, 92, 246, 0.25));
}

.sig-hero__tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.sig-hero__deck {
  max-width: 38rem;
  font-size: clamp(0.95rem, 2.2vw, 1.12rem);
  line-height: 1.75;
  color: var(--text-secondary);
  font-weight: 400;
}

.sig-hero__deck strong {
  color: var(--text-primary);
  font-weight: 600;
}

.sig-hero__metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 2.75rem;
}

.sig-metric {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--glass-border);
  background: var(--glass);
  padding: 0.85rem 1.1rem;
  border-radius: 10px;
  min-width: 140px;
}

.sig-metric span {
  display: block;
  margin-top: 0.35rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: none;
  color: var(--accent-violet);
}

/* ── Secondary strip ───────────────────────────────────── */
.sig-strip {
  position: relative;
  z-index: 1;
  padding: 2rem 1.5rem 4rem;
  max-width: 720px;
  margin: 0 auto;
}

.sig-strip__card {
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(139, 92, 246, 0.06), rgba(8, 8, 13, 0.6));
  padding: 1.75rem 1.5rem;
  backdrop-filter: blur(12px);
}

.sig-strip__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 0.75rem;
}

.sig-strip__headline {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.5vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.65rem;
  color: var(--text-primary);
}

.sig-strip__body {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-muted);
}

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2.5rem 1.5rem calc(2.5rem + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.site-footer__brand {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.site-footer__pulse {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-violet);
  box-shadow: 0 0 14px var(--neon-glow);
  animation: footer-pulse 2.8s ease-in-out infinite;
}

@keyframes footer-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.site-footer__regen {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 26rem;
  margin: 0 auto 1rem;
}

.site-footer__session {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-violet);
  margin-bottom: 0.35rem;
}

.site-footer__timestamp {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: #505060;
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
}

.site-footer .source {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid rgba(139, 92, 246, 0.25);
  padding-bottom: 2px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-footer .source:hover {
  color: var(--accent-violet);
  border-color: var(--accent-violet);
}

/* Scroll-reveal helper (GSAP sets final state) */
.sig-reveal {
  will-change: transform, opacity;
}

@media (max-width: 480px) {
  .sig-hero__metrics {
    flex-direction: column;
    align-items: stretch;
  }
  .sig-metric {
    text-align: center;
  }
}