@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

:root {
  --colors-primary: #111111;
  --colors-primary-active: #242424;
  --colors-brand-accent: #3b82f6;
  --colors-badge-orange: #fb923c;
  --colors-badge-pink: #ec4899;
  --colors-badge-violet: #8b5cf6;
  --colors-badge-emerald: #34d399;
  
  --colors-canvas: #ffffff;
  --colors-surface-soft: #f8f9fa;
  --colors-surface-card: #f5f5f5;
  --colors-surface-strong: #e5e7eb;
  --colors-surface-dark: #101010;
  --colors-surface-dark-elevated: #1a1a1a;
  --colors-hairline: #e5e7eb;
  --colors-hairline-soft: #f3f4f6;
  
  --colors-ink: #111111;
  --colors-body: #374151;
  --colors-muted: #6b7280;
  --colors-muted-soft: #898989;
  --colors-on-primary: #ffffff;
  --colors-on-dark: #ffffff;
  --colors-on-dark-soft: #a1a1aa;
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --spacing-xxs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-section: 96px;
  
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-pill: 9999px;
  --rounded-full: 50%;
}

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

body { 
  font-family: var(--font-family); 
  color: var(--colors-body); 
  background-color: var(--colors-canvas); 
  line-height: 1.5; 
  -webkit-font-smoothing: antialiased; 
}

/* Typography */
.display-xl { font-size: 64px; font-weight: 600; line-height: 1.05; letter-spacing: -2px; color: var(--colors-ink); }
.display-lg { font-size: 48px; font-weight: 600; line-height: 1.1; letter-spacing: -1.5px; color: var(--colors-ink); }
.display-md { font-size: 36px; font-weight: 600; line-height: 1.15; letter-spacing: -1px; color: var(--colors-ink); }
.display-sm { font-size: 28px; font-weight: 600; line-height: 1.2; letter-spacing: -0.5px; color: var(--colors-ink); }
.title-lg { font-size: 22px; font-weight: 600; line-height: 1.3; letter-spacing: -0.3px; color: var(--colors-ink); }
.title-md { font-size: 18px; font-weight: 600; line-height: 1.4; color: var(--colors-ink); }
.title-sm { font-size: 16px; font-weight: 600; line-height: 1.4; color: var(--colors-ink); }
.body-md { font-size: 16px; font-weight: 400; line-height: 1.5; color: var(--colors-body); }
.body-sm { font-size: 14px; font-weight: 400; line-height: 1.5; color: var(--colors-body); }

a { text-decoration: none; color: var(--colors-ink); }

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }
.section { padding: var(--spacing-section) 0; }
.section-divider { height: 1px; background-color: var(--colors-hairline-soft); max-width: 1200px; margin: 0 auto; }
.grid-3-up { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-lg); }

/* Top Nav */
.top-nav { height: 64px; background-color: var(--colors-canvas); display: flex; align-items: center; justify-content: space-between; padding: 0 var(--spacing-xl); position: sticky; top: 0; z-index: 50; border-bottom: 1px solid var(--colors-canvas); transition: border-color 0.2s; }
.nav-left, .nav-right { display: flex; align-items: center; gap: var(--spacing-xl); }
.brand-logo { font-size: 24px; font-weight: 700; color: var(--colors-ink); display: flex; align-items: center; gap: 10px; letter-spacing: -0.5px; }
.logo-icon { width: 32px !important; height: 32px !important; stroke: var(--colors-ink); }
.nav-links { display: flex; gap: var(--spacing-lg); }
.nav-link { position: relative; font-size: 14px; font-weight: 500; color: var(--colors-muted); padding: var(--spacing-xs) 0; transition: color 0.2s ease; }
.nav-link::after { content: ''; position: absolute; width: 0; height: 2px; bottom: 0; left: 0; background-color: var(--colors-ink); transition: width 0.3s ease; }
.nav-link:hover { color: var(--colors-ink); }
.nav-link:hover::after { width: 100%; }

/* Buttons */
.button-primary { display: inline-flex; align-items: center; justify-content: center; background-color: var(--colors-primary); color: var(--colors-on-primary); font-size: 14px; font-weight: 600; line-height: 1; padding: 12px 20px; border-radius: var(--rounded-md); border: none; cursor: pointer; transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1); box-shadow: 0 1px 2px rgba(0,0,0,0.05); }
.button-primary:hover { background-color: var(--colors-primary-active); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.button-primary:active { transform: translateY(0); }
.button-secondary { display: inline-flex; align-items: center; justify-content: center; background-color: var(--colors-canvas); color: var(--colors-ink); font-size: 14px; font-weight: 600; line-height: 1; padding: 12px 20px; border-radius: var(--rounded-md); border: 1px solid var(--colors-hairline); cursor: pointer; transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1); }
.button-secondary:hover { background-color: var(--colors-surface-soft); transform: translateY(-1px); box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.button-secondary:active { transform: translateY(0); }
.button-text-link { font-size: 14px; font-weight: 600; color: var(--colors-ink); background: none; border: none; cursor: pointer; }

/* Back to Top Button */
.back-to-top-btn { position: fixed; bottom: var(--spacing-xl); right: var(--spacing-xl); z-index: 100; opacity: 0; visibility: hidden; width: 44px; height: 44px; border-radius: var(--rounded-full); background-color: var(--colors-ink); color: var(--colors-canvas); border: none; display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: 0 4px 12px rgba(0,0,0,0.15); transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s cubic-bezier(0.4, 0, 0.2, 1); }
.back-to-top-btn.visible { opacity: 1; visibility: visible; }
.back-to-top-btn:hover { transform: translateY(-4px); box-shadow: 0 8px 16px rgba(0,0,0,0.2); }

/* Logo Carousel */
:root { --carousel-gap: 80px; }
.logo-carousel { overflow: hidden; white-space: nowrap; position: relative; width: 100%; mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent); -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent); }
.logo-track { display: flex; width: max-content; gap: var(--carousel-gap); align-items: center; animation: scroll-logos 30s linear infinite; }
.logo-item { display: flex; align-items: center; justify-content: center; filter: grayscale(100%) opacity(40%); color: var(--colors-ink); transition: filter 0.3s ease, opacity 0.3s ease; }
.logo-item:hover { filter: grayscale(0%) opacity(100%); }
.logo-item svg { height: 32px; max-width: 180px; width: auto; }

@keyframes scroll-logos {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(-50% - calc(var(--carousel-gap) / 2))); }
}

/* Hero */
.hero-band { padding: var(--spacing-section) 0; background-color: var(--colors-canvas); }
.hero-grid { display: grid; grid-template-columns: 7fr 5fr; gap: var(--spacing-xxl); align-items: center; }
.hero-content h1 { margin-bottom: var(--spacing-md); }
.hero-subtitle { margin-bottom: var(--spacing-xl); color: var(--colors-body); font-size: 18px; }
.hero-actions { display: flex; gap: var(--spacing-sm); }

/* App Mockup Card */
.hero-app-mockup-card { background-color: var(--colors-canvas); border: 1px solid var(--colors-hairline); border-radius: var(--rounded-xl); box-shadow: 0 4px 12px rgba(0,0,0,0.08); padding: var(--spacing-lg); width: 100%; max-width: 480px; transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease; }
.hero-app-mockup-card:hover { transform: translateY(-4px); box-shadow: 0 12px 24px rgba(0,0,0,0.12); }
.mockup-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--colors-hairline); padding-bottom: var(--spacing-sm); margin-bottom: var(--spacing-md); }
.mockup-title { font-weight: 600; font-size: 14px; color: var(--colors-ink); }
.mockup-status { font-size: 12px; font-weight: 500; color: var(--colors-success); background-color: rgba(16, 185, 129, 0.1); padding: 4px 8px; border-radius: var(--rounded-md); }
.mockup-row { display: flex; justify-content: space-between; padding: var(--spacing-sm) 0; border-bottom: 1px solid var(--colors-hairline-soft); }
.mockup-label { font-size: 14px; color: var(--colors-muted); }
.mockup-value { font-size: 14px; font-weight: 500; color: var(--colors-ink); }
.mockup-btn { width: 100%; margin-top: var(--spacing-md); }

/* Section Header */
.section-header { margin-bottom: var(--spacing-xxl); max-width: 700px; }
.section-header h2 { margin-bottom: var(--spacing-sm); }
.subtitle { color: var(--colors-body); font-size: 18px; }

/* Cards */
.feature-card { background-color: var(--colors-surface-card); border-radius: var(--rounded-lg); padding: var(--spacing-xl); transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 8px 16px rgba(0,0,0,0.06); }
.feature-card h3 { margin-bottom: var(--spacing-sm); margin-top: var(--spacing-lg); }

.feature-icon-card { background-color: var(--colors-canvas); border: 1px solid var(--colors-hairline); border-radius: var(--rounded-lg); padding: var(--spacing-lg); transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease; }
.feature-icon-card:hover { transform: translateY(-4px); box-shadow: 0 8px 16px rgba(0,0,0,0.06); }
.feature-icon-card h3 { margin-bottom: var(--spacing-xs); margin-top: var(--spacing-md); }
.icon-circle { width: 40px; height: 40px; border-radius: var(--rounded-full); background-color: var(--colors-surface-soft); display: flex; align-items: center; justify-content: center; font-size: 20px; }

.cta-band-light { background-color: var(--colors-surface-card); border-radius: var(--rounded-lg); padding: var(--spacing-xxl); text-align: center; }
.cta-band-light h2 { margin-bottom: var(--spacing-sm); }

/* Badges */
.badge-pill { display: inline-block; font-size: 13px; font-weight: 500; padding: 4px 12px; border-radius: var(--rounded-pill); }

/* Footer */
.footer { background-color: var(--colors-surface-dark); color: var(--colors-on-dark-soft); padding: 16px 0; margin-top: 32px; }
.footer-container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-left { display: flex; flex-direction: column; gap: 4px; }
.footer-logo { color: var(--colors-on-dark); margin-bottom: 0; font-size: 18px; display: flex; align-items: center; gap: 8px; font-weight: 700; letter-spacing: -0.5px; }
.footer-logo svg { width: 20px; height: 20px; }
.footer-copyright { font-size: 12px; color: var(--colors-on-dark-soft); }
.footer-right { display: flex; gap: var(--spacing-md); font-size: 13px; }
.footer-link { color: var(--colors-on-dark-soft); transition: color 0.2s ease; text-decoration: none; }
.footer-link:hover { color: var(--colors-on-dark); }

/* Animation Utils */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.animate-fade-in { animation: fadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards; }
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }

@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3-up { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --spacing-section: 64px;
    --spacing-xxl: 40px;
    --carousel-gap: 40px;
  }
  .display-xl { font-size: 42px; line-height: 1.1; }
  .display-lg { font-size: 32px; }
  
  .top-nav { height: auto; flex-direction: column; padding: var(--spacing-md); gap: var(--spacing-md); }
  .nav-left { flex-direction: column; width: 100%; gap: var(--spacing-sm); }
  .nav-right { width: 100%; justify-content: center; gap: var(--spacing-sm); }
  .nav-links { display: flex; width: 100%; justify-content: center; flex-wrap: wrap; gap: var(--spacing-md); }
  
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions button, .hero-actions a { width: 100%; text-align: center; }
  
  .grid-3-up { grid-template-columns: 1fr; gap: var(--spacing-lg); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); }
  
  .logo-item svg { height: 24px; }
}

@media (max-width: 480px) {
  .display-xl { font-size: 36px; }
  .display-lg { font-size: 28px; }
}