/* ============================================
   RobiClaw Brand System & Global Styles
   ============================================ */

:root {
  /* Colors */
  --orange: #e13613;
  --orange-hover: #c42d0f;
  --orange-light: rgba(225, 54, 19, 0.1);
  --navy: #090b13;
  --navy-2: #0d0f1a;
  --navy-3: #111626;
  --navy-4: #1a1f33;
  --gray: #8b92a8;
  --gray-light: #c5c9d6;
  --white: #ffffff;
  
  /* Typography */
  --font-sans: 'Barlow', system-ui, -apple-system, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --section-padding: 120px;
  --container-padding: 24px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-weight: var(--font-weight-normal);
  background: var(--navy);
  color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ============================================
   Header
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--orange);
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(225, 54, 19, 0.3);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-image {
  height: 42px;
  width: auto;
  filter: brightness(0) invert(1);
  object-fit: contain;
}

.logo-text {
  font-size: 24px;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  display: flex;
  gap: 0;
}

.logo-robi {
  font-weight: var(--font-weight-bold);
}

.logo-claw {
  font-weight: var(--font-weight-normal);
}

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

.nav-link {
  color: var(--white);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: opacity 0.2s;
}

.nav-link:hover {
  opacity: 0.8;
}

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

.btn-primary {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  background: var(--orange);
  color: var(--white);
  text-decoration: none;
  font-weight: var(--font-weight-bold);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: 8px;
  transition: all 0.2s;
  box-shadow: 0 4px 16px rgba(225, 54, 19, 0.3);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--orange-hover);
  box-shadow: 0 6px 24px rgba(225, 54, 19, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  background: transparent;
  color: var(--white);
  text-decoration: none;
  font-weight: var(--font-weight-bold);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: 8px;
  border: 2px solid var(--navy-4);
  transition: all 0.2s;
  cursor: pointer;
}

.btn-secondary:hover {
  border-color: var(--orange);
  box-shadow: 0 4px 16px rgba(225, 54, 19, 0.2);
}

.btn-large {
  padding: 20px 40px;
  font-size: 16px;
}

.btn-subtitle {
  font-size: 12px;
  font-weight: var(--font-weight-medium);
  text-transform: none;
  letter-spacing: 0;
  opacity: 0.8;
  margin-top: 4px;
}

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

.hero {
  padding: 160px 0 120px;
  background: linear-gradient(180deg, var(--navy-2) 0%, var(--navy) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.eyebrow {
  font-size: 13px;
  font-weight: var(--font-weight-bold);
  color: var(--orange);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 64px;
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.highlight {
  color: var(--orange);
}

.hero-description {
  font-size: 20px;
  color: var(--gray-light);
  line-height: 1.6;
  margin-bottom: 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 48px;
  font-weight: var(--font-weight-bold);
  color: var(--orange);
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  font-weight: var(--font-weight-semibold);
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 8px;
}

/* Terminal Visual */
.terminal-window {
  background: var(--navy-3);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.terminal-header {
  background: var(--navy-4);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gray);
  opacity: 0.3;
}

.terminal-title {
  font-size: 13px;
  font-weight: var(--font-weight-semibold);
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.terminal-content {
  padding: 24px;
  min-height: 400px;
}

.chat-message {
  margin-bottom: 24px;
}

.chat-message.user .message-text {
  background: var(--navy-4);
  padding: 16px;
  border-radius: 8px;
  border-left: 3px solid var(--orange);
}

.chat-message.assistant .message-text {
  color: var(--gray-light);
}

.typing-indicator {
  color: var(--orange);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.code-block {
  margin-top: 16px;
  background: var(--navy-4);
  border-radius: 8px;
  overflow: hidden;
}

.code-header {
  padding: 8px 16px;
  background: var(--navy-2);
  font-size: 12px;
  color: var(--gray);
  font-weight: var(--font-weight-semibold);
  border-bottom: 1px solid var(--navy-3);
}

.code-block pre {
  padding: 16px;
  margin: 0;
  overflow-x: auto;
}

.code-block code {
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray-light);
}

/* ============================================
   Section Shared Styles
   ============================================ */

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 80px;
}

.section-title {
  font-size: 56px;
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.section-description {
  font-size: 18px;
  color: var(--gray-light);
  line-height: 1.6;
}

/* ============================================
   Features Section
   ============================================ */

.features {
  padding: var(--section-padding) 0;
  background: var(--navy);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--navy-3);
  padding: 40px;
  border-radius: 12px;
  border: 1px solid var(--navy-4);
  transition: all 0.3s;
}

.feature-card:hover {
  border-color: var(--orange);
  box-shadow: 0 8px 32px rgba(225, 54, 19, 0.1);
  transform: translateY(-4px);
}

.feature-number {
  font-size: 48px;
  font-weight: var(--font-weight-bold);
  color: var(--orange);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 24px;
}

.feature-title {
  font-size: 24px;
  font-weight: var(--font-weight-bold);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: -0.5px;
}

.feature-description {
  font-size: 16px;
  color: var(--gray-light);
  line-height: 1.6;
}

/* ============================================
   How It Works Section
   ============================================ */

.how-it-works {
  padding: var(--section-padding) 0;
  background: var(--navy-2);
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 80px;
  max-width: 900px;
  margin: 0 auto;
}

.step {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 40px;
  align-items: start;
}

.step-visual {
  display: flex;
  justify-content: center;
}

.step-icon {
  width: 120px;
  height: 120px;
  background: var(--navy-3);
  border: 2px solid var(--orange);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--orange);
}

.step-icon svg {
  width: 56px;
  height: 56px;
}

.step-number {
  font-size: 13px;
  font-weight: var(--font-weight-bold);
  color: var(--orange);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.step-title {
  font-size: 32px;
  font-weight: var(--font-weight-bold);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: -0.5px;
}

.step-description {
  font-size: 16px;
  color: var(--gray-light);
  line-height: 1.6;
}

/* ============================================
   Tech Stack Section
   ============================================ */

.tech-stack {
  padding: var(--section-padding) 0;
  background: var(--navy);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}

.tech-item {
  background: var(--navy-3);
  padding: 32px 24px;
  border-radius: 12px;
  border: 1px solid var(--navy-4);
  text-align: center;
  transition: all 0.3s;
}

.tech-item:hover {
  border-color: var(--orange);
  transform: translateY(-4px);
}

.tech-icon-svg {
  color: var(--orange);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-icon-svg svg {
  width: 40px;
  height: 40px;
}

.tech-name {
  font-size: 16px;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.tech-desc {
  font-size: 12px;
  color: var(--gray);
}

/* ============================================
   Pricing Section
   ============================================ */

.pricing {
  padding: var(--section-padding) 0;
  background: var(--navy-2);
}

/* System Checker */
.system-checker {
  max-width: 800px;
  margin: 0 auto 64px;
  background: var(--navy-3);
  border: 2px solid var(--orange);
  border-radius: 16px;
  padding: 48px;
  text-align: center;
}

.checker-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}

.checker-header svg {
  color: var(--orange);
}

.checker-header h3 {
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  margin: 0;
}

.checker-description {
  font-size: 16px;
  color: var(--gray-light);
  line-height: 1.6;
  margin-bottom: 32px;
}

.checker-description strong {
  color: var(--white);
  font-weight: var(--font-weight-semibold);
}

.no-refund-warning {
  display: block;
  margin-top: 12px;
  color: var(--orange);
  font-weight: var(--font-weight-semibold);
}

#check-system-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.system-results {
  margin-top: 32px;
  text-align: left;
}

.result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--navy-4);
  border-radius: 8px;
  margin-bottom: 12px;
}

.result-icon {
  font-size: 20px;
  min-width: 24px;
  text-align: center;
}

.result-label {
  font-weight: var(--font-weight-semibold);
  color: var(--white);
  min-width: 180px;
}

.result-value {
  color: var(--gray-light);
  flex: 1;
}

.result-summary {
  margin-top: 24px;
  padding: 24px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: var(--font-weight-semibold);
  text-align: center;
}

.result-summary.compatible {
  background: rgba(74, 222, 128, 0.1);
  border: 2px solid #4ade80;
  color: #4ade80;
}

.result-summary.incompatible {
  background: rgba(248, 113, 113, 0.1);
  border: 2px solid #f87171;
  color: #f87171;
}

.result-summary.partial {
  background: rgba(251, 191, 36, 0.1);
  border: 2px solid #fbbf24;
  color: #fbbf24;
}

.pricing-card {
  max-width: 600px;
  margin: 0 auto 80px;
  background: var(--navy-3);
  border: 2px solid var(--orange);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(225, 54, 19, 0.2);
}

.pricing-header {
  background: var(--orange);
  padding: 48px;
  text-align: center;
}

.pricing-title {
  font-size: 24px;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
}

.price-amount {
  font-size: 72px;
  font-weight: var(--font-weight-bold);
  line-height: 1;
}

.price-period {
  font-size: 20px;
  font-weight: var(--font-weight-semibold);
  opacity: 0.8;
}

.pricing-note {
  margin-top: 16px;
  font-size: 14px;
  font-weight: var(--font-weight-medium);
  opacity: 0.9;
  letter-spacing: 0.02em;
}

.pricing-features {
  padding: 48px;
}

.pricing-feature {
  padding: 16px 0;
  border-bottom: 1px solid var(--navy-4);
  font-size: 16px;
  font-weight: var(--font-weight-semibold);
}

.pricing-feature:last-child {
  border-bottom: none;
}

.pricing-cta {
  padding: 0 48px 48px;
  text-align: center;
}

.requirements {
  max-width: 900px;
  margin: 0 auto;
  background: var(--navy-3);
  padding: 48px;
  border-radius: 12px;
  border: 1px solid var(--navy-4);
}

.requirements-title {
  font-size: 24px;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: -0.5px;
  margin-bottom: 32px;
  text-align: center;
}

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.requirement {
  font-size: 15px;
  color: var(--gray-light);
}

.requirement strong {
  color: var(--orange);
  font-weight: var(--font-weight-bold);
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
  padding: var(--section-padding) 0;
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-2) 100%);
}

.cta-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.cta-branding {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 40px;
  padding: 32px;
  background: rgba(225, 54, 19, 0.05);
  border: 2px solid var(--orange);
  border-radius: 16px;
}

.cta-logo {
  width: 80px;
  height: auto;
  filter: brightness(0) invert(1);
}

.cta-wordmark {
  font-size: 72px;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: -2px;
  line-height: 1;
  margin: 0;
}

.cta-robi {
  font-weight: var(--font-weight-bold);
  color: var(--white);
}

.cta-claw {
  font-weight: var(--font-weight-medium);
  color: var(--white);
}

.cta-title {
  font-size: 32px;
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
  color: var(--orange);
  text-transform: uppercase;
}

.cta-description {
  font-size: 20px;
  color: var(--gray-light);
  line-height: 1.6;
  margin-bottom: 40px;
}

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

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

.footer {
  background: var(--navy-2);
  padding: 80px 0 40px;
  border-top: 1px solid var(--navy-4);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  margin-bottom: 48px;
}

.footer-tagline {
  color: var(--gray);
  margin-top: 16px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-heading {
  font-size: 13px;
  font-weight: var(--font-weight-bold);
  color: var(--orange);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.footer-link {
  display: block;
  color: var(--gray-light);
  text-decoration: none;
  margin-bottom: 12px;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--orange);
}

.footer-bottom {
  text-align: center;
  padding-top: 40px;
  border-top: 1px solid var(--navy-4);
}

.footer-copyright,
.footer-credit {
  font-size: 14px;
  color: var(--gray);
  margin-bottom: 8px;
}

.footer-credit a {
  color: var(--orange);
  text-decoration: none;
}

.footer-credit a:hover {
  text-decoration: underline;
}

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

@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-title {
    font-size: 48px;
  }
  
  .section-title {
    font-size: 40px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .requirements-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .nav {
    display: none;
  }
}