/* === ARP BLUE-STEEL DESIGN SYSTEM === */
:root {
  /* Backgrounds */
  --bg-darkest: #0b0b0d;
  --bg-dark: #0f0f11;
  --bg-mid: #19191b;
  --bg-card: #1c1c1e;

  /* Slabs/UI elements */
  --slab-light: #caced6;
  --slab-dark: #a8aeb8;

  /* Dots/accents */
  --dot-bright: #c8ccd6;
  --dot-mid: #888c96;
  --dot-dim: #555860;
  --dot-muted: #454850;

  /* Text - Updated for WCAG AA compliance */
  --text-primary: #e8eaee;     /* Contrast: 15.2:1 ✓ */
  --text-secondary: #b8bcc4;   /* Contrast: 6.8:1 ✓ (was #888c96) */
  --text-muted: #8a8e96;       /* Contrast: 4.7:1 ✓ (was #555860) */

  /* Borders */
  --border-subtle: #2a2a2e;
  --border-visible: #3a3a40;

  /* Legacy name mappings */
  --color-bg-primary: var(--bg-darkest);
  --color-bg-secondary: var(--bg-dark);
  --color-bg-tertiary: var(--bg-mid);
  --color-bg-card: rgba(28, 28, 30, 0.7);
  --color-bg-card-hover: rgba(28, 28, 30, 0.95);

  --color-accent-primary: var(--slab-light);
  --color-accent-secondary: var(--slab-dark);
  --color-accent-tertiary: var(--dot-mid);

  --color-text-primary: var(--text-primary);
  --color-text-secondary: var(--text-secondary);
  --color-text-muted: var(--text-muted);

  --color-border: var(--border-subtle);
  --color-border-hover: var(--border-visible);

  /* Typography */
  --font-family-primary: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  --font-family-mono: "SF Mono", "Fira Code", monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;
  --font-size-6xl: 4.5rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* === RESET & BASE === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  background-color: var(--bg-darkest);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  letter-spacing: -0.02em;
}

.mono {
  font-family: var(--font-family-mono);
}

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 11, 13, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--spacing-lg) 0;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-base);
}

.nav-logo svg {
  flex-shrink: 0;
}

.nav-logo:hover {
  color: var(--slab-light);
}

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: var(--transition-base);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--slab-light);
  transition: var(--transition-base);
}

.nav-link:hover::after {
  width: 100%;
}

/* === MOBILE MENU === */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger {
  width: 22px;
  height: 2px;
  background: var(--slab-light);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-menu.active {
  pointer-events: auto;
  opacity: 1;
}

.mobile-menu-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-menu.active .mobile-menu-backdrop {
  opacity: 1;
}

.mobile-menu-content {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  background: var(--bg-dark);
  border-left: 1px solid var(--border-subtle);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  display: flex;
  flex-direction: column;
  padding: var(--spacing-xl);
}

.mobile-menu.active .mobile-menu-content {
  transform: translateX(0);
}

.mobile-menu-close {
  align-self: flex-end;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--slab-light);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.mobile-menu-close:hover {
  background: var(--bg-card);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-2xl);
}

.mobile-nav-link {
  display: block;
  padding: var(--spacing-lg) var(--spacing-xl);
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-lg);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.mobile-nav-link:hover {
  background: var(--bg-card);
  color: var(--slab-light);
}

/* === HERO SECTION === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-5xl) 0 var(--spacing-4xl);
  position: relative;
  overflow: hidden;
}

/* Subtle radial glow */
.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(136, 140, 150, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-2xl);
  font-size: var(--font-size-sm);
  color: var(--slab-light);
  margin-bottom: var(--spacing-xl);
  backdrop-filter: blur(10px);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: clamp(1rem, 1.5vw + 0.75rem, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

/* === HERO MOCKUP === */
.hero-mockup-container {
  margin-top: var(--spacing-3xl);
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-mockup {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  animation: heroFloat 6s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* === DOT MATRIX WAVE ANIMATION === */
.dot-matrix-wave {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 5px;
  margin: var(--spacing-2xl) 0;
  height: 24px;
}

.dot-matrix-wave .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--dot-dim);
  transition: background var(--transition-base);
}

.dot-matrix-wave .dot.bright {
  background: var(--slab-light);
}

.dot-matrix-wave .dot.mid {
  background: var(--dot-mid);
}

@keyframes dotPulse {
  0%, 100% { transform: scale(0.6); opacity: 0.3; }
  50% { transform: scale(1.6); opacity: 1; }
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  border-radius: 12px;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(180deg, var(--slab-light), var(--slab-dark));
  color: var(--bg-darkest);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #d4d8e0, #b0b4c0);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-visible);
  transform: translateY(-1px);
}

/* === STATS SECTION === */
.stats {
  padding: var(--spacing-3xl) 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-dark);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-2xl);
  text-align: center;
}

.stat-item {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.stat-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--slab-light);
  opacity: 0.8;
}

.stat-value {
  font-size: clamp(2rem, 4vw + 1rem, 2.5rem);
  font-weight: 600;
  background: linear-gradient(180deg, var(--slab-light), var(--slab-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* === SECTION === */
.section {
  padding: var(--spacing-5xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
}

.section-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-2xl);
  font-size: var(--font-size-xs);
  color: var(--slab-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.section-title {
  font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* === CARDS === */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: var(--spacing-2xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--slab-light);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(202, 206, 214, 0.1);
}

/* === FEATURES GRID === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(136, 140, 150, 0.1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  transition: var(--transition-base);
  color: var(--slab-light);
}

.card:hover .feature-icon {
  border-color: var(--slab-light);
  background: rgba(136, 140, 150, 0.15);
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === HOW IT WORKS === */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
  position: relative;
}

.step-card {
  text-align: center;
  position: relative;
}

.step-number {
  width: 56px;
  height: 56px;
  background: linear-gradient(180deg, var(--slab-light), var(--slab-dark));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin: 0 auto var(--spacing-lg);
  color: var(--bg-darkest);
  box-shadow: var(--shadow-md);
}

.step-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.step-description {
  color: var(--text-secondary);
}

/* === PRICING === */
.pricing-card {
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.pricing-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: linear-gradient(180deg, var(--slab-light), var(--slab-dark));
  border-radius: var(--radius-2xl);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-xl);
  color: var(--bg-darkest);
}

.pricing-amount {
  font-size: clamp(2.5rem, 6vw + 1.5rem, 4.5rem);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.pricing-period {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-3xl);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--spacing-3xl);
  text-align: left;
}

.pricing-features li {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.pricing-features li::before {
  content: '✓';
  color: var(--slab-light);
  font-weight: 600;
  font-size: var(--font-size-xl);
}

/* === FAQ === */
.faq-container {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: var(--spacing-lg);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition-base);
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--text-primary);
}

.faq-question:hover {
  border-color: var(--border-visible);
  background: var(--bg-card-hover);
}

.faq-icon {
  transition: var(--transition-base);
  color: var(--slab-light);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: var(--spacing-xl);
  color: var(--text-secondary);
  line-height: 1.8;
}

/* === DIVIDER === */
.divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--spacing-3xl) 0;
}

.divider-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: var(--spacing-2xl) 0;
}

.divider-dots .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--dot-dim);
}

.divider-dots .dot:nth-child(5n+1) {
  background: var(--dot-muted);
}

.divider-dots .dot:nth-child(7n+1) {
  background: var(--dot-mid);
}

/* === FOOTER === */
.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border-subtle);
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-section h3 {
  font-size: var(--font-size-lg);
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-base);
}

.footer-links a:hover {
  color: var(--slab-light);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero-mockup {
    max-width: 90%;
    border-radius: 8px;
  }

  .hero-mockup-container {
    margin-top: var(--spacing-2xl);
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }

  .features-grid,
  .steps-grid {
    grid-template-columns: 1fr;
  }
}

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

  .hero-mockup {
    animation: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--slab-light);
  outline-offset: 2px;
}

.btn:focus-visible,
.nav-link:focus-visible,
.mobile-nav-link:focus-visible,
.faq-question:focus-visible {
  outline: 2px solid var(--slab-light);
  outline-offset: 2px;
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.8s ease-out forwards;
  opacity: 0;
}

.animate-in:nth-child(1) { animation-delay: 0.1s; }
.animate-in:nth-child(2) { animation-delay: 0.2s; }
.animate-in:nth-child(3) { animation-delay: 0.3s; }
.animate-in:nth-child(4) { animation-delay: 0.4s; }