/* ============================================
   Neurons.work Landing Page
   Design: Dark mode, neural energy, calm futurism
   ============================================ */

/* Variables */
:root {
  /* Colors */
  --bg-primary: #08090a;
  --bg-secondary: #0f1117;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;

  --gradient-primary: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  --gradient-text: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));

  --border-color: rgba(255, 255, 255, 0.08);
  --glow-purple: 0 0 40px rgba(139, 92, 246, 0.3);
  --glow-cyan: 0 0 40px rgba(6, 182, 212, 0.3);

  /* Spacing */
  --container-max: 1200px;
  --section-padding: 100px;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-medium: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Neural Background Canvas */
#neural-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.4;
}

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

/* ============================================
   Header
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  background: rgba(8, 9, 10, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1.25rem;
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-dot {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 400;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-medium);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--glow-purple);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(139, 92, 246, 0.5);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-purple);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* ============================================
   Hero
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 80px;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.rotating-text {
  display: inline-block;
  vertical-align: bottom;
  overflow: hidden;
  height: calc(1.15em + 6px);
  text-align: left;
  margin-bottom: -8px;
}

.rotating-text-inner {
  display: block;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.rotating-word {
  display: block;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin: 0 auto 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Value Props
   ============================================ */
.value-props {
  padding: var(--section-padding) 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
}

.value-item {
  text-align: center;
  padding: 32px;
}

.value-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.value-item h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.value-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ============================================
   Apps
   ============================================ */
.apps {
  padding: var(--section-padding) 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 60px;
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.app-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  transition: all var(--transition-medium);
}

.app-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-purple);
  transform: translateY(-4px);
  box-shadow: var(--glow-purple);
}

.app-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.app-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--bg-card-hover);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.app-badge.badge-live {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border-color: rgba(16, 185, 129, 0.3);
}

.app-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.app-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.app-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 100px;
  background: rgba(139, 92, 246, 0.15);
  color: #a78bfa;
  border: 1px solid rgba(139, 92, 246, 0.3);
}

/* ============================================
   How it works
   ============================================ */
.how-it-works {
  padding: var(--section-padding) 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 60px;
}

.step {
  text-align: center;
  max-width: 250px;
}

.step-number {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: white;
}

.step h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.step-arrow {
  font-size: 1.5rem;
  color: var(--text-muted);
}

/* ============================================
   CTA
   ============================================ */
.cta {
  padding: var(--section-padding) 0;
  text-align: center;
}

.cta-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-subtitle {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.cta-form {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 500px;
  margin: 0 auto;
}

.cta-input {
  flex: 1;
  min-width: 250px;
  padding: 14px 20px;
  font-size: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-fast);
}

.cta-input::placeholder {
  color: var(--text-muted);
}

.cta-input:focus {
  border-color: var(--accent-purple);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.footer-tagline {
  width: 100%;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 8px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
  }

  .nav {
    gap: 16px;
  }

  .nav-link {
    display: none;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .steps {
    flex-direction: column;
  }

  .step-arrow {
    transform: rotate(90deg);
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-brand {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .rotating-text {
    display: block;
    text-align: center;
    margin-bottom: 0;
  }
}

/* ============================================
   Animations
   ============================================ */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

/* Scroll reveal - add 'reveal' class to elements */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Page Content (Privacy, Terms, About, Contact)
   ============================================ */
.page-content {
  padding-top: 120px;
  padding-bottom: var(--section-padding);
  min-height: 100vh;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-meta {
  color: var(--text-muted);
  margin-bottom: 48px;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 48px;
  max-width: 600px;
}

/* Prose (long-form content) */
.prose {
  max-width: 720px;
}

.prose h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 48px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.prose h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.prose p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.7;
}

.prose ul {
  color: var(--text-secondary);
  margin-bottom: 16px;
  padding-left: 24px;
}

.prose li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.prose a {
  color: var(--accent-purple);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.prose blockquote {
  border-left: 3px solid var(--accent-purple);
  padding-left: 20px;
  margin: 32px 0;
  font-style: italic;
  color: var(--text-primary);
  font-size: 1.125rem;
}

/* ============================================
   Contact Page
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  margin-top: 20px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  transition: all var(--transition-medium);
}

.contact-card:hover {
  border-color: var(--accent-purple);
  background: var(--bg-card-hover);
}

.contact-icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.contact-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.contact-link {
  color: var(--accent-purple);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.contact-link:hover {
  color: var(--accent-cyan);
}

.contact-form-container h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 14px 16px;
  font-size: 1rem;
  font-family: var(--font-sans);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent-purple);
}

.form-group select {
  cursor: pointer;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ============================================
   About Page
   ============================================ */
.about-hero {
  margin-bottom: 48px;
}

.about-lead {
  font-size: 1.5rem;
  color: var(--text-primary);
  line-height: 1.5;
  max-width: 600px;
}

.about-apps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin: 24px 0 32px;
}

.about-app {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.about-app-icon {
  font-size: 1.5rem;
}

.about-app strong {
  display: block;
  margin-bottom: 4px;
}

.about-app p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0;
}

/* ============================================
   Responsive - Additional Pages
   ============================================ */
@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .page-title {
    font-size: 2rem;
  }

  .about-lead {
    font-size: 1.25rem;
  }
}