/* ================================================
   ARKA AI — Design System & Styles
   Premium Dark Mode Landing Page
   ================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── Design Tokens ── */
:root {
  /* Brand Colors (extracted from logo) */
  --color-magenta: #9B1B5C;
  --color-magenta-light: #C2347A;
  --color-crimson: #C41E3A;
  --color-orange: #F5A623;
  --color-gold: #FFD700;

  /* Backgrounds */
  --bg-primary: #08050D;
  --bg-secondary: #0E0A16;
  --bg-tertiary: #140F1F;
  --bg-card: rgba(255, 255, 255, 0.025);
  --bg-card-hover: rgba(255, 255, 255, 0.05);

  /* Text */
  --text-primary: #F5F5F7;
  --text-secondary: #8E8EA0;
  --text-tertiary: #55556A;

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, var(--color-magenta), var(--color-crimson), var(--color-orange));
  --gradient-brand-reverse: linear-gradient(135deg, var(--color-orange), var(--color-crimson), var(--color-magenta));
  --gradient-text: linear-gradient(135deg, #FFFFFF 20%, var(--color-orange) 100%);
  --gradient-glow-magenta: radial-gradient(circle, rgba(155, 27, 92, 0.25) 0%, transparent 70%);
  --gradient-glow-orange: radial-gradient(circle, rgba(245, 166, 35, 0.15) 0%, transparent 70%);

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-border-hover: rgba(255, 255, 255, 0.12);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

  /* Spacing */
  --section-padding: clamp(80px, 10vw, 140px);
  --container-max: 1200px;
  --container-padding: clamp(20px, 5vw, 40px);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

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

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-out-expo);
  --transition-medium: 0.5s var(--ease-out-expo);
  --transition-slow: 0.8s var(--ease-out-expo);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

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

/* ── Section Shared ── */
.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-orange);
  margin-bottom: 20px;
}

.section-label::before {
  content: '';
  width: 30px;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* ── Gradient Text ── */
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ══════════════════════════════════════════════════
   NAVBAR
   ══════════════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 24px 0;
  transition: var(--transition-medium);
}

.navbar.scrolled {
  padding: 16px 0;
  background: rgba(8, 5, 13, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}


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

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

.navbar-logo {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  object-fit: contain;
}

.navbar-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.navbar-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
  transition: width var(--transition-medium);
}

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

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

/* CTA Button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--gradient-brand);
  color: #FFFFFF;
  font-family: var(--font-family);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(155, 27, 92, 0.4), 0 4px 15px rgba(245, 166, 35, 0.2);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid var(--glass-border-hover);
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-magenta);
  transform: translateY(-2px);
}

/* Mobile nav toggle */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* ══════════════════════════════════════════════════
   HERO SECTION
   ══════════════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

/* Animated Mesh Gradient Background */
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(155, 27, 92, 0.25) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(196, 30, 58, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(245, 166, 35, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(155, 27, 92, 0.1) 0%, transparent 40%);
  animation: meshMove 20s ease-in-out infinite alternate;
  z-index: 0;
}

/* Subtle grid overlay — REMOVED */
.hero::after {
  display: none;
}

@keyframes meshMove {
  0% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(3%, -3%) rotate(1deg); }
  66% { transform: translate(-2%, 2%) rotate(-1deg); }
  100% { transform: translate(1%, -1%) rotate(0.5deg); }
}

.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-content {
  flex: 1;
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-orange);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-badge .pulse-dot {
  width: 6px;
  height: 6px;
  background: var(--color-orange);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.hero-description {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 540px;
}

.hero-buttons {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--glass-border);
}

.hero-stat-value {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.hero-stat-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Floating orb on the right */
.hero-visual {
  flex: 0 0 auto;
  position: relative;
  width: 400px;
  height: 400px;
}

.hero-orb {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: 
    radial-gradient(circle at 35% 35%, rgba(245, 166, 35, 0.6), transparent 60%),
    radial-gradient(circle at 65% 65%, rgba(155, 27, 92, 0.8), transparent 60%),
    radial-gradient(circle at 50% 50%, rgba(196, 30, 58, 0.5), transparent 70%);
  filter: blur(60px);
  animation: orbFloat 8s ease-in-out infinite alternate;
  opacity: 0.6;
}

@keyframes orbFloat {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(15px, -20px) scale(1.05); }
  100% { transform: translate(-10px, 10px) scale(0.95); }
}

/* ══════════════════════════════════════════════════
   SERVICES SECTION
   ══════════════════════════════════════════════════ */
.services {
  background: var(--bg-secondary);
  position: relative;
}

.services::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
}

.services-header {
  text-align: center;
  margin-bottom: 60px;
}

.services-header .section-subtitle {
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  position: relative;
  padding: 40px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--glass-border);
  border-radius: 0;
  transition: var(--transition-medium);
  overflow: hidden;
}

.service-card::before {
  display: none;
}

.service-card:hover {
  background: transparent;
  border-color: var(--glass-border-hover);
  transform: none;
  box-shadow: none;
}

.service-card:hover::before {
  opacity: 0;
}

.service-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(155, 27, 92, 0.1);
  border: 1px solid rgba(155, 27, 92, 0.15);
  font-size: 1.6rem;
  margin-bottom: 24px;
  transition: var(--transition-medium);
}

.service-card:hover .service-icon {
  background: rgba(155, 27, 92, 0.2);
  transform: scale(1.05);
}

.service-card:nth-child(2) .service-icon {
  background: rgba(196, 30, 58, 0.1);
  border-color: rgba(196, 30, 58, 0.15);
}

.service-card:nth-child(2):hover .service-icon {
  background: rgba(196, 30, 58, 0.2);
}

.service-card:nth-child(3) .service-icon {
  background: rgba(245, 166, 35, 0.1);
  border-color: rgba(245, 166, 35, 0.15);
}

.service-card:nth-child(3):hover .service-icon {
  background: rgba(245, 166, 35, 0.2);
}

.service-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.service-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.service-features {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.service-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.service-feature .check {
  color: var(--color-orange);
  font-weight: 700;
}

/* ══════════════════════════════════════════════════
   PROCESS / HOW IT WORKS SECTION
   ══════════════════════════════════════════════════ */
.process {
  position: relative;
  overflow: hidden;
}

.process::before {
  content: '';
  position: absolute;
  top: 50%;
  right: -200px;
  width: 500px;
  height: 500px;
  background: var(--gradient-glow-magenta);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  pointer-events: none;
}

.process-header {
  text-align: center;
  margin-bottom: 80px;
}

.process-header .section-subtitle {
  margin: 0 auto;
}

.process-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

/* Connecting line */
.process-timeline::before {
  content: '';
  position: absolute;
  top: 44px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-magenta), var(--color-crimson), var(--color-orange));
  opacity: 0.3;
  z-index: 0;
}

.process-step {
  text-align: center;
  position: relative;
  padding: 0 16px;
  z-index: 1;
}

.step-number {
  width: 88px;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--glass-border);
  font-size: 1.8rem;
  transition: var(--transition-medium);
}

.process-step:hover .step-number {
  border-color: var(--color-magenta);
  box-shadow: 0 0 30px rgba(155, 27, 92, 0.3);
  transform: scale(1.1);
}

.step-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.step-description {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ══════════════════════════════════════════════════
   ROI SECTION
   ══════════════════════════════════════════════════ */
.roi {
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.roi::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: var(--gradient-glow-orange);
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.3;
  pointer-events: none;
}

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

.roi-content .section-title {
  max-width: 480px;
}

.roi-quote {
  margin-top: 32px;
  padding: 24px 28px;
  background: var(--glass-bg);
  border-left: 3px solid var(--color-orange);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  font-style: italic;
}

.roi-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.roi-stat-card {
  padding: 32px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition-medium);
}

.roi-stat-card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--glass-shadow);
}

.roi-stat-number {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 8px;
}

.roi-stat-unit {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ══════════════════════════════════════════════════
   CTA SECTION
   ══════════════════════════════════════════════════ */
.cta-section {
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 600px;
  background: 
    radial-gradient(ellipse at center, rgba(155, 27, 92, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse at center, rgba(245, 166, 35, 0.08) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.cta-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

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

.btn-large {
  padding: 16px 40px;
  font-size: 1.05rem;
}

/* ══════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════ */
.footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--glass-border);
}

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

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

.footer-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.footer-name {
  font-size: 1.2rem;
  font-weight: 700;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
  max-width: 320px;
}

.footer-links {
  display: flex;
  gap: 32px;
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--glass-border);
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

/* ══════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

  .services-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }

  .process-timeline {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .process-timeline::before {
    display: none;
  }

  .roi-layout {
    grid-template-columns: 1fr;
    gap: 50px;
  }
}

@media (max-width: 768px) {
  .navbar-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 20px var(--container-padding);
    background: rgba(8, 5, 13, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    gap: 20px;
  }

  .navbar-links.active {
    display: flex;
  }

  .navbar-toggle {
    display: flex;
  }

  .hero-visual {
    display: none;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }

  .process-timeline {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .roi-stats-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: 30px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}