/* ==========================================================================
   Code Coin Cognition — Base styles + component system
   Depends on: tokens.css
   ========================================================================== */

/* Reset ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg-ink);
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }

/* Layout --------------------------------------------------------------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  max-width: var(--article-width);
  margin: 0 auto;
  padding: 0 24px;
}

section.band { padding: 88px 0; border-top: 1px solid var(--border-soft); }
section.band:first-of-type { border-top: 0; }
.section-head { margin-bottom: 48px; }
.section-head.flex {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  flex-wrap: wrap;
}

/* Typography ----------------------------------------------------------- */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
}
.h-display {
  font-size: clamp(44px, 6vw, 68px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.02em;
}
.h-section {
  font-size: clamp(28px, 3.5vw, 38px);
  font-weight: 700;
  line-height: 1.1;
}
.h-card {
  font-size: 22px;
  font-weight: 650;
  line-height: 1.25;
}
.body-lg { font-size: 19px; line-height: 1.6; color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }

.mono {
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  display: inline-block;
}
.grad-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Header / nav --------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 16, 32, 0.62);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border-soft);
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: inline-block;
  flex-shrink: 0;
}
.wordmark {
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  display: inline-flex;
  gap: 6px;
  white-space: nowrap;
}
.wordmark .w-code { color: var(--text-primary); }
.wordmark .w-dot  { color: var(--text-muted); }
.wordmark .w-coin { color: var(--accent-amber); }
.wordmark .w-cog  { color: var(--accent-cyan); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 150ms ease;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text-primary);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}
.nav-toggle span {
  width: 20px;
  height: 1.5px;
  background: currentColor;
  display: block;
  position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 1.5px;
  background: currentColor;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after  { top: 6px; }

@media (max-width: 820px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 16px 24px 24px;
    background: var(--bg-navy);
    border-bottom: 1px solid var(--border-soft);
  }
  .nav-links.open a {
    padding: 10px 0;
    width: 100%;
    font-size: 15px;
  }
  .nav-links.open .btn { margin-top: 8px; }
}

/* Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14px;
  padding: 13px 22px;
  border-radius: var(--radius-pill);
  transition: transform 180ms ease, box-shadow 220ms ease, filter 180ms ease;
  white-space: nowrap;
  line-height: 1.2;
}
.btn-primary {
  background: var(--grad-primary);
  color: #020617;
  box-shadow: 0 8px 28px rgba(34, 211, 238, 0.18);
}
.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.28);
}
.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.10);
  transform: translateY(-1px);
}
.btn-sm { padding: 10px 16px; font-size: 13px; }

.arrow-link {
  color: var(--accent-cyan);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 180ms ease, color 180ms ease;
}
.arrow-link:hover { gap: 10px; color: var(--text-primary); }

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

/* Cards ---------------------------------------------------------------- */
.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
  color: inherit;
  display: block;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}
.card-link { text-decoration: none; }
.card p { color: var(--text-muted); margin: 0; }
.card h3 { color: var(--text-primary); }

/* Chips (category tags) ------------------------------------------------ */
.chip {
  display: inline-flex;
  align-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-soft);
  color: var(--text-muted);
}
.chip-cyan   { color: var(--accent-cyan);   border-color: rgba(34, 211, 238, 0.35); background: rgba(34, 211, 238, 0.08); }
.chip-violet { color: var(--accent-violet); border-color: rgba(139, 92, 246, 0.35); background: rgba(139, 92, 246, 0.08); }
.chip-amber  { color: var(--accent-amber);  border-color: rgba(245, 158, 11, 0.35); background: rgba(245, 158, 11, 0.08); }
.chip-mint   { color: var(--accent-mint);   border-color: rgba(52, 211, 153, 0.35); background: rgba(52, 211, 153, 0.08); }
.chip-coral  { color: var(--accent-coral);  border-color: rgba(251, 113, 133, 0.35); background: rgba(251, 113, 133, 0.08); }

/* Status badges -------------------------------------------------------- */
.badge-dot {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}
.badge-dot::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}
.badge-live  { color: var(--accent-mint); }
.badge-proto { color: var(--accent-cyan); }
.badge-indev { color: var(--accent-violet); }
.badge-rsrch { color: var(--accent-amber); }

/* Grids ---------------------------------------------------------------- */
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; }
.grid-featured {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
}
.grid-featured .side {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 900px) {
  .grid-4, .grid-3, .grid-2, .grid-featured { grid-template-columns: 1fr; }
  .grid-featured .side { grid-template-rows: auto; }
}

/* Hero ---------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 112px 0 96px;
  background:
    radial-gradient(circle at 18% 22%, rgba(34, 211, 238, 0.16), transparent 38%),
    radial-gradient(circle at 82% 12%, rgba(139, 92, 246, 0.14), transparent 38%),
    radial-gradient(circle at 90% 85%, rgba(251, 113, 133, 0.08), transparent 45%),
    var(--bg-ink);
}
@media (max-width: 820px) {
  .hero { padding: 80px 0 64px; }
}
.hero-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
}
.hero p.subhead {
  color: var(--text-secondary);
  font-size: 19px;
  line-height: 1.6;
  margin: 22px 0 32px;
  max-width: 560px;
}
.microproof {
  margin-top: 32px;
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  font-size: 12px;
}
.microproof span {
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.microproof span::before {
  content: "●";
  margin-right: 8px;
  font-size: 8px;
}
.microproof .mp-cyan::before  { color: var(--accent-cyan); }
.microproof .mp-mint::before  { color: var(--accent-mint); }
.microproof .mp-coral::before { color: var(--accent-coral); }
.microproof .mp-amber::before { color: var(--accent-amber); }
.microproof .mp-violet::before { color: var(--accent-violet); }

/* Newsletter band / featured module ----------------------------------- */
.newsletter-band {
  text-align: center;
  padding: 88px 24px;
  background:
    radial-gradient(ellipse at center top, rgba(34, 211, 238, 0.12), transparent 50%),
    radial-gradient(ellipse at 30% 100%, rgba(139, 92, 246, 0.10), transparent 55%),
    var(--bg-navy);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-soft);
}
.newsletter-band h2 {
  font-size: clamp(26px, 4vw, 40px);
  max-width: 720px;
  margin: 12px auto 16px;
  letter-spacing: -0.015em;
  line-height: 1.15;
}
.newsletter-band p {
  max-width: 560px;
  margin: 0 auto 28px;
  color: var(--text-secondary);
}
.promises {
  display: flex;
  gap: 28px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 28px;
  font-size: 13px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}
.promises span::before { content: "—"; margin-right: 6px; color: var(--accent-cyan); }

/* Footer -------------------------------------------------------------- */
.site-footer {
  padding: 48px 0 56px;
  border-top: 1px solid var(--border-soft);
  color: var(--text-muted);
  font-size: 13px;
}
.site-footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.site-footer a { color: var(--text-muted); transition: color 150ms; }
.site-footer a:hover { color: var(--text-primary); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 10px; }

/* Article (long-form) ------------------------------------------------- */
.prose {
  color: var(--text-secondary);
  max-width: var(--article-width);
  margin: 0 auto;
}
.prose h2 { font-size: 28px; margin: 40px 0 16px; }
.prose h3 { font-size: 22px; margin: 28px 0 12px; }
.prose p  { margin: 0 0 18px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 18px; }
.prose li { margin-bottom: 8px; }
.prose a  { color: var(--accent-cyan); text-decoration: underline; text-decoration-color: rgba(34, 211, 238, 0.35); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: var(--accent-cyan); }
.prose code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9em;
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent-cyan);
}

/* Utility -------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }

/* Motion respect ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}