/* ==========================================================================
   Latent Mixer — shared design system with latentmastering.com
   Same tokens, same bones. Elevated card treatments added for the new sites.
   ========================================================================== */

:root {
  --bg: #0f0a1a;
  --bg-elev: #15102099;
  --panel: #1a1226;
  --panel-hover: #241a33;
  --border: #33254a;
  --border-bright: #4a3470;
  --text: #e5e0f5;
  --text-muted: #9d94b8;
  --accent: #a78bfa;
  --accent-hover: #c4b5fd;
  --accent-dim: #6d28d9;
  --accent-glow: rgba(167, 139, 250, 0.18);
  --accent-glow-strong: rgba(109, 40, 217, 0.35);
  --gradient-violet: linear-gradient(135deg, rgba(167, 139, 250, 0.12) 0%, rgba(109, 40, 217, 0.04) 100%);
  --gradient-violet-strong: linear-gradient(135deg, rgba(167, 139, 250, 0.18) 0%, rgba(109, 40, 217, 0.06) 100%);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
  --shadow-card-hover: 0 8px 32px rgba(109, 40, 217, 0.22);
  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius: 12px;
  --radius-lg: 16px;
  --transition: 180ms ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); }
a:hover { color: var(--accent-hover); }

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Nav
   ========================================================================== */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}
.nav .wordmark {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }
.nav-links .btn-primary,
.nav-links .btn-primary:hover { color: #150c26; }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition),
              color var(--transition), transform var(--transition),
              box-shadow var(--transition);
}
.btn-primary {
  background: var(--accent);
  color: #150c26;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #150c26;
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-large {
  padding: 0.9rem 2rem;
  font-size: 1rem;
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  padding: 6.5rem 0 5.5rem;
  text-align: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -25%;
  left: 50%;
  transform: translateX(-50%);
  width: 70rem;
  height: 34rem;
  background: radial-gradient(ellipse at center, var(--accent-dim) 0%, transparent 70%);
  opacity: 0.32;
  pointer-events: none;
  z-index: 0;
}
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(167, 139, 250, 0.08), transparent);
  pointer-events: none;
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
.hero .eyebrow {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  margin-bottom: 1.5rem;
  background: var(--gradient-violet);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-hover);
  letter-spacing: 0.02em;
}
.hero h1 {
  font-size: clamp(2.1rem, 5.2vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 1.4rem;
  max-width: 46rem;
  margin-left: auto;
  margin-right: auto;
}
.hero h1 .accent {
  background: linear-gradient(120deg, var(--accent-hover), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 40rem;
  margin: 0 auto 2.25rem;
}
.hero .cta-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.hero .fine-print {
  margin-top: 1.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Section headings
   ========================================================================== */

.section {
  padding: 4.5rem 0;
  border-top: 1px solid var(--border);
}
.section h2 {
  text-align: center;
  font-size: 1.9rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.75rem;
}
.section .section-lead {
  text-align: center;
  color: var(--text-muted);
  max-width: 36rem;
  margin: 0 auto 3rem;
  font-size: 1.0625rem;
}

/* ==========================================================================
   Feature grid — elevated cards with violet glow + hover lift
   ========================================================================== */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.25rem;
}
.feature-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem 1.5rem;
  overflow: hidden;
  transition: background var(--transition), border-color var(--transition),
              transform var(--transition), box-shadow var(--transition);
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.feature-card:hover {
  background: var(--panel-hover);
  border-color: var(--accent-dim);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}
.feature-card:hover::before { opacity: 1; }
.feature-card .card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 1rem;
  border-radius: 10px;
  background: var(--gradient-violet);
  border: 1px solid var(--border);
  color: var(--accent-hover);
}
.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  color: var(--accent-hover);
  letter-spacing: -0.005em;
}
.feature-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* ==========================================================================
   Gradient highlight card — the POP treatment, used for hero/differentiator
   ========================================================================== */

.card-gradient {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  overflow: hidden;
  background-image: var(--gradient-violet-strong);
  box-shadow: var(--shadow-card);
}
.card-gradient::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 30rem;
  height: 30rem;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 60%);
  opacity: 0.18;
  pointer-events: none;
}
.card-gradient > * { position: relative; z-index: 1; }
.card-gradient h2,
.card-gradient h3 { color: var(--text); }
.card-gradient p { color: var(--text); }
.card-gradient p.muted { color: var(--text-muted); }

/* ==========================================================================
   How it works — numbered steps
   ========================================================================== */

.how-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 2.5rem;
  counter-reset: step;
}
.how-step {
  text-align: center;
  position: relative;
}
.how-step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--gradient-violet);
  border: 1px solid var(--border-bright);
  color: var(--accent-hover);
  font-weight: 700;
  font-size: 1.0625rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 0 24px var(--accent-glow);
}
.how-step h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  color: var(--text);
}
.how-step p {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.9375rem;
}

/* ==========================================================================
   Differentiator / "Why Latent Mixer" pillars
   ========================================================================== */

.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}
.pillar {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--transition), background var(--transition);
}
.pillar:hover {
  border-color: var(--accent-dim);
  background: var(--panel-hover);
}
.pillar h4 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: var(--accent-hover);
}
.pillar p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ==========================================================================
   Testing CTA band
   ========================================================================== */

.testing-cta {
  padding: 5rem 0;
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--panel);
  position: relative;
  overflow: hidden;
}
.testing-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40rem;
  height: 20rem;
  background: radial-gradient(ellipse at center, var(--accent-dim) 0%, transparent 70%);
  opacity: 0.18;
  pointer-events: none;
}
.testing-cta > * { position: relative; z-index: 1; }
.testing-cta h2 {
  font-size: 1.9rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.testing-cta p {
  color: var(--text-muted);
  margin-bottom: 2.25rem;
  font-size: 1.0625rem;
}
.testing-cta .cta-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}
.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }

/* ==========================================================================
   Docs page
   ========================================================================== */

.docs-content {
  max-width: 44rem;
  margin: 3rem auto 5rem;
}
.docs-content h1 {
  font-size: 2.1rem;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}
.docs-content .lead {
  color: var(--text-muted);
  margin-bottom: 2rem;
}
.docs-content h2 {
  font-size: 1.4rem;
  margin-top: 2.75rem;
  color: var(--accent-hover);
  letter-spacing: -0.005em;
}
.docs-content p,
.docs-content li { color: var(--text-muted); }
.docs-content p { margin-bottom: 1rem; }
.docs-content em { color: var(--text); font-style: normal; }
.docs-content dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem 1.25rem;
  margin-top: 1rem;
}
.docs-content dt {
  color: var(--text);
  font-weight: 600;
}
.docs-content dd { margin: 0; }
.docs-content ul { padding-left: 1.25rem; }
.docs-content li { margin-bottom: 0.5rem; }

/* ==========================================================================
   Feedback form
   ========================================================================== */

.feedback-wrap {
  max-width: 32rem;
  margin: 3rem auto 5rem;
}
.feedback-wrap h1 {
  font-size: 1.85rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}
.feedback-wrap p.lead {
  color: var(--text-muted);
  margin-bottom: 2rem;
}
.form-field { margin-bottom: 1.25rem; }
.form-field label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.9375rem;
  font-weight: 600;
}
.form-field textarea,
.form-field select,
.form-field input[type="text"],
.form-field input[type="email"] {
  width: 100%;
  padding: 0.7rem 0.85rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9375rem;
  transition: border-color var(--transition);
}
.form-field textarea { min-height: 8rem; resize: vertical; }
.form-field textarea:focus,
.form-field select:focus,
.form-field input:focus {
  outline: none;
  border-color: var(--accent);
}
.hp-field { position: absolute; left: -9999px; top: -9999px; }
.form-status {
  margin-top: 1rem;
  font-size: 0.9375rem;
}
.form-status.success { color: var(--accent-hover); }
.form-status.error { color: #f87171; }

/* ==========================================================================
   Scroll reveal (progressive enhancement, respects reduced motion)
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 480ms ease, transform 480ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn-primary:hover { transform: none; }
  .feature-card:hover { transform: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 640px) {
  .hero { padding: 4rem 0 3.5rem; }
  .section { padding: 3.5rem 0; }
  .nav-links { gap: 1rem; }
  .nav-links .btn { padding: 0.5rem 1rem; font-size: 0.875rem; }
  .card-gradient { padding: 1.75rem; }
  .testing-cta { padding: 4rem 0; }
  .pillars { grid-template-columns: 1fr; }
}