/* ============================================================
   KORVEN — Landing Page Stylesheet
   Design: Modern B2B Tech — Blue Palette, Dark/Light themes
   ============================================================ */

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

/* ============================================================
   CSS CUSTOM PROPERTIES — DESIGN TOKENS
   ============================================================ */
:root {
  /* Blue Palette */
  --blue-50:  #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-800: #1e40af;
  --blue-900: #1e3a8a;

  /* Spacing */
  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
  --space-4: 1rem;     --space-5: 1.25rem;  --space-6: 1.5rem;
  --space-8: 2rem;     --space-10: 2.5rem;  --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;    --space-24: 6rem;

  /* Typography */
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --text-xs: 0.75rem; --text-sm: 0.875rem; --text-base: 1rem;
  --text-lg: 1.125rem; --text-xl: 1.25rem; --text-2xl: 1.5rem;
  --text-3xl: 1.875rem; --text-4xl: 2.25rem;
  --text-5xl: 3rem; --text-6xl: 3.75rem; --text-7xl: 4.5rem;

  /* Radii */
  --radius-sm: 0.375rem; --radius-md: 0.625rem;
  --radius-lg: 1rem; --radius-xl: 1.5rem; --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================================
   DARK THEME (default)
   ============================================================ */
[data-theme="dark"] {
  /* Backgrounds */
  --bg-base:    #050c1a;
  --bg-surface: #0a1628;
  --bg-card:    #0d1e35;
  --bg-card-hover: #112540;
  --bg-elevated: #0f2340;
  --bg-input:   #0d1e35;
  --bg-overlay: rgba(5, 12, 26, 0.85);

  /* Text */
  --text-primary:   #f0f6ff;
  --text-secondary: #94afc8;
  --text-muted:     #5a7a9c;
  --text-disabled:  #3a5570;

  /* Borders */
  --border-subtle: rgba(59, 130, 246, 0.12);
  --border-base:   rgba(59, 130, 246, 0.2);
  --border-strong: rgba(59, 130, 246, 0.35);
  --border-focus:  #3b82f6;

  /* Blue accents */
  --accent-primary: #3b82f6;
  --accent-light:   #60a5fa;
  --accent-dark:    #2563eb;
  --accent-glow:    rgba(59, 130, 246, 0.25);
  --accent-glow-lg: rgba(59, 130, 246, 0.12);

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-blue: 0 0 40px rgba(59, 130, 246, 0.15);
  --shadow-blue-sm: 0 0 20px rgba(59, 130, 246, 0.2);

  /* Navbar */
  --nav-bg: rgba(5, 12, 26, 0.85);
  --nav-border: rgba(59, 130, 246, 0.15);
}

/* ============================================================
   LIGHT THEME
   ============================================================ */
[data-theme="light"] {
  --bg-base:    #f8faff;
  --bg-surface: #eef4ff;
  --bg-card:    #ffffff;
  --bg-card-hover: #f0f7ff;
  --bg-elevated: #ffffff;
  --bg-input:   #ffffff;
  --bg-overlay: rgba(248, 250, 255, 0.92);

  --text-primary:   #0f1923;
  --text-secondary: #3b5270;
  --text-muted:     #6b8aaa;
  --text-disabled:  #a0b8cc;

  --border-subtle: rgba(37, 99, 235, 0.1);
  --border-base:   rgba(37, 99, 235, 0.2);
  --border-strong: rgba(37, 99, 235, 0.35);
  --border-focus:  #2563eb;

  --accent-primary: #2563eb;
  --accent-light:   #3b82f6;
  --accent-dark:    #1d4ed8;
  --accent-glow:    rgba(37, 99, 235, 0.18);
  --accent-glow-lg: rgba(37, 99, 235, 0.07);

  --shadow-sm:  0 1px 4px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.12);
  --shadow-blue: 0 0 40px rgba(37, 99, 235, 0.1);
  --shadow-blue-sm: 0 0 20px rgba(37, 99, 235, 0.15);

  --nav-bg: rgba(248, 250, 255, 0.9);
  --nav-border: rgba(37, 99, 235, 0.12);
}


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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, textarea, select { font: inherit; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
  position: relative;
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--accent-primary); border-radius: var(--radius-full); }

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: background var(--transition-slow), border-color var(--transition-slow),
              box-shadow var(--transition-base);
}

.navbar.scrolled {
  box-shadow: 0 4px 24px rgba(0,0,0,0.3), var(--shadow-blue);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: opacity var(--transition-fast);
}

.nav-logo:hover { opacity: 0.85; }

.logo-icon {
  color: var(--accent-primary);
  transition: color var(--transition-base);
  display: flex;
  align-items: center;
}

.logo-text {
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent-light), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  padding-bottom: 2px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 2px;
  transition: width var(--transition-base);
}

.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after { width: 100%; }

.nav-cta {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent-primary);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--border-base);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.nav-cta:hover {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
}

/* Nav Controls */
.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.control-btn {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  color: var(--text-secondary);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  transition: all var(--transition-base);
  height: 36px;
}

.control-btn:hover {
  background: var(--bg-elevated);
  border-color: var(--border-strong);
  color: var(--text-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.lang-flag { font-size: 1rem; line-height: 1; }
.lang-label { font-size: var(--text-xs); font-weight: 700; }

.icon-sun, .icon-moon { transition: opacity var(--transition-fast), transform var(--transition-fast); }
[data-theme="dark"] .icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: block; }
[data-theme="light"] .icon-sun  { display: block; }
[data-theme="light"] .icon-moon { display: none; }

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: 600;
  transition: all var(--transition-spring);
  cursor: pointer;
  border: none;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.1) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-dark));
  color: white;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.55);
}

.btn-primary:active { transform: translateY(0); }

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

.btn-ghost:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.btn-full { width: 100%; justify-content: center; }

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-primary);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
}

.section-title {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(70px + var(--space-16)) 0 var(--space-16);
  overflow: hidden;
}

/* Hero Background */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 40%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 40%, black 20%, transparent 75%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  animation: glowPulse 6s ease-in-out infinite;
}

.hero-glow-1 {
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.18) 0%, transparent 70%);
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
}

.hero-glow-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
  bottom: 10%;
  right: 10%;
  animation-delay: -3s;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.7; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.08); }
}

.hero-glow-2 {
  animation: glowPulse2 7s ease-in-out infinite;
}

@keyframes glowPulse2 {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

/* Floating Orbs */
.floating-orbs { position: absolute; inset: 0; overflow: hidden; }

.orb {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  animation: orbFloat linear infinite;
}

.orb-1 {
  width: 200px; height: 200px;
  top: 20%; left: 5%;
  animation-duration: 25s;
  background: radial-gradient(circle at 30% 30%, rgba(59, 130, 246, 0.06), transparent);
}

.orb-2 {
  width: 120px; height: 120px;
  top: 60%; right: 8%;
  animation-duration: 18s;
  animation-direction: reverse;
  background: radial-gradient(circle at 30% 30%, rgba(59, 130, 246, 0.08), transparent);
}

.orb-3 {
  width: 80px; height: 80px;
  top: 35%; right: 25%;
  animation-duration: 22s;
  background: radial-gradient(circle at 30% 30%, rgba(59, 130, 246, 0.05), transparent);
}

@keyframes orbFloat {
  0% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(30px, -40px) rotate(90deg); }
  50% { transform: translate(-20px, -60px) rotate(180deg); }
  75% { transform: translate(-40px, -20px) rotate(270deg); }
  100% { transform: translate(0, 0) rotate(360deg); }
}

/* Hero Content */
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent-light);
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.25);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-8);
  animation: fadeInDown 0.8s ease both;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-primary);
  animation: badgePulse 2s ease-in-out infinite;
  box-shadow: 0 0 8px var(--accent-primary);
}

@keyframes badgePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}

.hero-title {
  font-size: clamp(var(--text-4xl), 7vw, var(--text-7xl));
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
  animation: fadeInDown 0.9s ease 0.1s both;
}

.hero-title-gradient {
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent-primary) 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200%;
  animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-subtitle {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.75;
  margin-bottom: var(--space-10);
  animation: fadeInDown 1s ease 0.2s both;
}

.hero-ctas {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--space-16);
  animation: fadeInUp 1s ease 0.35s both;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-6) var(--space-10);
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-2xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md), var(--shadow-blue);
  animation: fadeInUp 1s ease 0.5s both;
}

.stat-item { text-align: center; }

.stat-number {
  display: block;
  font-size: var(--text-3xl);
  font-weight: 900;
  color: var(--accent-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-label {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-weight: 500;
  margin-top: var(--space-1);
  white-space: nowrap;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-base);
}

/* Scroll Indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  animation: fadeInUp 1s ease 0.8s both;
}

.scroll-line {
  width: 2px;
  height: 50px;
  background: linear-gradient(to bottom, var(--accent-primary), transparent);
  border-radius: 2px;
  animation: scrollLine 1.5s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { opacity: 0.4; transform: scaleY(0.5); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
}

/* ============================================================
   TRUSTED SECTION
   ============================================================ */
.trusted {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-surface);
}

.trusted-label {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: var(--space-8);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.trusted-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-base);
}

.trust-badge:hover {
  border-color: var(--border-base);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.trust-badge svg { color: var(--accent-primary); flex-shrink: 0; }

/* ============================================================
   SERVICES SECTION
   ============================================================ */
.services { background: var(--bg-base); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.service-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  overflow: hidden;
  cursor: default;
}

.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(59, 130, 246, 0.04) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-base);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-blue-sm);
}

.service-card:hover::before { opacity: 1; }

/* Featured card */
.service-card-featured {
  grid-column: span 1;
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(37, 99, 235, 0.08) 100%);
  border-color: var(--border-base);
}

.service-card-featured .service-card-glow {
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.service-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-lg);
  color: var(--accent-primary);
  margin-bottom: var(--space-5);
  transition: all var(--transition-base);
}

.service-card:hover .service-icon {
  background: rgba(59, 130, 246, 0.18);
  border-color: rgba(59, 130, 246, 0.35);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}

.service-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.service-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.service-features li {
  font-size: var(--text-sm);
  color: var(--text-muted);
  padding-left: var(--space-4);
  position: relative;
  font-weight: 500;
}

.service-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  opacity: 0.6;
}

.service-arrow {
  position: absolute;
  bottom: var(--space-6);
  right: var(--space-6);
  font-size: var(--text-xl);
  color: var(--accent-primary);
  opacity: 0;
  transform: translateX(-8px);
  transition: all var(--transition-base);
}

.service-card:hover .service-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ============================================================
   WHY US SECTION
   ============================================================ */
.why-us {
  background: var(--bg-surface);
  overflow: hidden;
}

.why-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.why-glow {
  position: absolute;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
  top: -200px;
  right: -200px;
  border-radius: 50%;
}

.why-us .container { position: relative; z-index: 1; }

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-8);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.why-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.why-card:hover {
  border-color: var(--border-base);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md), var(--shadow-blue-sm);
}

.why-card:hover::before { opacity: 1; }

.why-number {
  font-family: var(--font-mono);
  font-size: clamp(4rem, 8vw, 6rem);
  font-weight: 700;
  color: var(--border-subtle);
  line-height: 1;
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  transition: color var(--transition-base);
  user-select: none;
}

.why-card:hover .why-number { color: rgba(59, 130, 246, 0.15); }

.why-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.why-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ============================================================
   PROCESS SECTION
   ============================================================ */
.process { background: var(--bg-base); }

.process-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: relative;
}

.process-connector {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), rgba(59, 130, 246, 0.3));
  margin-top: 28px;
  position: relative;
  min-width: 40px;
}

.process-connector::after {
  content: '';
  position: absolute;
  right: -1px;
  top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: rgba(59, 130, 246, 0.3);
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 0 0 auto;
  width: 210px;
}

.step-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--accent-primary);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.step-content { text-align: center; }

.step-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(59, 130, 246, 0.1));
  border: 1.5px solid var(--border-base);
  border-radius: var(--radius-xl);
  color: var(--accent-primary);
  margin: 0 auto var(--space-4);
  transition: all var(--transition-spring);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.1);
}

.process-step:hover .step-icon {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(59, 130, 246, 0.2));
  border-color: var(--accent-primary);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.3);
  transform: scale(1.08);
}

.step-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.step-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 180px;
  margin: 0 auto;
}

/* ============================================================
   TECH SECTION
   ============================================================ */
.tech { background: var(--bg-surface); }

.tech-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.tech-category {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.tech-category:hover {
  border-color: var(--border-base);
  box-shadow: var(--shadow-sm);
}

.tech-category-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
}

.tech-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-pill {
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: default;
}

.tech-pill:hover {
  background: rgba(59, 130, 246, 0.08);
  border-color: rgba(59, 130, 246, 0.25);
  color: var(--accent-light);
  transform: translateY(-1px);
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */
.contact {
  background: var(--bg-base);
  overflow: hidden;
}

.contact-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.contact-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, transparent 70%);
  top: -100px;
  left: -100px;
  border-radius: 50%;
}

.contact .container { position: relative; z-index: 1; }

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info { position: sticky; top: 100px; }

.contact-info .section-tag { display: inline-flex; }
.contact-info .section-title { text-align: left; margin-bottom: var(--space-5); }

.contact-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-8);
}

.contact-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.contact-highlight {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.highlight-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-lg);
  color: var(--accent-primary);
}

.contact-highlight strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.contact-highlight p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ============================================================
   FORM
   ============================================================ */
.contact-form-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  box-shadow: var(--shadow-lg), var(--shadow-blue);
  position: relative;
}

.contact-form-wrapper::before {
  content: '';
  position: absolute;
  top: -1px;
  left: var(--space-10);
  right: var(--space-10);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), var(--accent-light), transparent);
  border-radius: 0 0 2px 2px;
}

.contact-form { display: flex; flex-direction: column; gap: var(--space-5); }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
  resize: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-disabled);
}

/* Native select hidden — replaced by custom select */
.form-group select {
  display: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
  background: var(--bg-elevated);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.field-error {
  font-size: var(--text-xs);
  color: #ef4444;
  font-weight: 500;
  min-height: 16px;
}

/* Checkbox */
.form-checkbox { flex-direction: row; }

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  appearance: none;
  flex-shrink: 0;
  cursor: pointer;
  margin-top: 2px;
  transition: all var(--transition-fast);
  position: relative;
}

.checkbox-label input[type="checkbox"]:checked {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.checkbox-label input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  width: 5px;
  height: 9px;
  border: 2px solid white;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

.form-link {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Submit Button */
#submit-btn {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
  font-weight: 700;
  margin-top: var(--space-2);
  letter-spacing: 0.02em;
}

#submit-btn.loading .btn-text { display: none; }
#submit-btn .btn-loading { display: none; }
#submit-btn.loading .btn-loading { display: flex; align-items: center; justify-content: center; }

.spin {
  animation: spinAnim 0.8s linear infinite;
}

@keyframes spinAnim {
  to { transform: rotate(360deg); }
}

/* Success & Error Messages */
.form-success, .form-error-global {
  display: none;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}

.form-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.25);
  color: #22c55e;
}

.form-success svg { color: #22c55e; flex-shrink: 0; }
.form-success strong { display: block; font-weight: 700; margin-bottom: var(--space-1); }

.form-error-global {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #ef4444;
}

.form-error-global svg { flex-shrink: 0; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-4);
  line-height: 1.6;
  max-width: 280px;
}

.footer-links-group h4 {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-5);
}

.footer-links-group ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

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

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-subtle);
}

.footer-bottom p {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.footer-sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs) !important;
  opacity: 0.6;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Intersection observer driven animations */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-card-featured {
    grid-column: span 2;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .contact-info { position: static; }

  .process-steps {
    flex-direction: column;
    gap: var(--space-6);
    align-items: flex-start;
  }

  .process-connector {
    display: none;
  }

  .process-step {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-5);
    width: 100%;
  }

  .step-content { text-align: left; }
  .step-icon { margin: 0; flex-shrink: 0; }
  .step-desc { max-width: none; margin: 0; }
}

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

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--nav-border);
    padding: var(--space-6);
    gap: var(--space-2);
    z-index: 999;
  }

  .nav-links.open .nav-link,
  .nav-links.open .nav-cta {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
  }

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

  .section { padding: var(--space-16) 0; }

  .services-grid { grid-template-columns: 1fr; }
  .service-card-featured { grid-column: span 1; }

  .why-grid { grid-template-columns: 1fr; }

  .tech-categories { grid-template-columns: 1fr; }

  .form-row { grid-template-columns: 1fr; }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-5);
    padding: var(--space-6);
  }

  .stat-divider {
    width: 100%;
    height: 1px;
  }

  .footer-content { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-bottom { flex-direction: column; gap: var(--space-2); text-align: center; }

  .contact-form-wrapper { padding: var(--space-6); }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-4); }

  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }

  .hero-ctas .btn { width: 100%; justify-content: center; }

  .trusted-logos { gap: var(--space-3); }

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

/* ============================================================
   SELECTION STYLE
   ============================================================ */
::selection {
  background: rgba(59, 130, 246, 0.3);
  color: var(--text-primary);
}

/* ============================================================
   FOCUS STYLES (accessibility)
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   CUSTOM SELECT DROPDOWN
   ============================================================ */

.custom-select-wrapper {
  position: relative;
  width: 100%;
  user-select: none;
}

.cs-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-input);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-disabled);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  min-height: 42px;
  font-family: var(--font-body);
}

.cs-trigger.has-value { color: var(--text-primary); }

.cs-trigger:hover {
  border-color: var(--border-strong);
  background: var(--bg-elevated);
}

.cs-trigger.open {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
  background: var(--bg-elevated);
}

.cs-trigger.error {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.cs-trigger-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cs-chevron {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  transition: transform var(--transition-base), color var(--transition-fast);
}

.cs-trigger.open .cs-chevron {
  transform: rotate(180deg);
  color: var(--accent-primary);
}

.cs-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 500;
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--border-subtle);
  overflow: hidden;
  opacity: 0;
  transform: translateY(-8px) scale(0.98);
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
  transform-origin: top center;
}

.cs-dropdown.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}



.cs-options {
  max-height: 220px;
  overflow-y: auto;
  padding: var(--space-2);
  scrollbar-width: thin;
  scrollbar-color: var(--accent-primary) transparent;
}

.cs-options::-webkit-scrollbar { width: 4px; }
.cs-options::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 4px;
}

.cs-option {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  min-height: 36px;
}

.cs-option:hover {
  background: rgba(59, 130, 246, 0.08);
  color: var(--text-primary);
  padding-left: 1rem;
}

.cs-option.selected {
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent-primary);
  font-weight: 600;
}

.cs-option.selected::after {
  content: '';
  position: absolute;
  right: 0.875rem;
  top: 50%;
  width: 5px;
  height: 9px;
  border: 2px solid var(--accent-primary);
  border-top: none;
  border-left: none;
  transform: translateY(calc(-50% - 1px)) rotate(45deg);
}

.cs-option.placeholder-opt {
  color: var(--text-disabled);
  font-style: italic;
  pointer-events: none;
}

.cs-option.hidden { display: none; }