/* ============================================================
   EB CORP — DESIGN SYSTEM
   Stack: Vanilla CSS (custom properties, no framework)
   Author: EB Corp Web Blueprint
   ============================================================

   TABLE OF CONTENTS
   1.  Custom Properties (Design Tokens)
   2.  Reset & Base
   3.  Typography
   4.  Layout Utilities
   5.  Buttons
   6.  Navigation
   7.  Hero
   8.  Stats Bar
   9.  Pain Points
   10. Solution
   11. Services
   12. Process
   13. Projects
   14. Testimonials
   15. CTA Final
   16. Footer
   17. WhatsApp FAB
   18. Animations & AOS
   19. Responsive
============================================================ */

/* ============================================================
   1. DESIGN TOKENS
   ============================================================ */
:root {
  /* Brand Colors */
  --color-primary:        #1A2B5F;   /* Deep Navy — authority, technical trust */
  --color-primary-dark:   #0F1A3D;
  --color-primary-light:  #2A3F8F;

  --color-accent-electric: #00D4FF;  /* Electric Cyan — energy, innovation */
  --color-accent-yellow:   #F5A623;  /* Amber — electrical warning, attention */
  --color-accent-green:    #00C896;  /* Emerald — digital, growth */

  /* Neutrals */
  --color-dark:     #0D1117;
  --color-dark-2:   #161B27;
  --color-gray-900: #111827;
  --color-gray-700: #374151;
  --color-gray-500: #6B7280;
  --color-gray-300: #D1D5DB;
  --color-gray-100: #F3F4F6;
  --color-white:    #FFFFFF;

  /* Semantic */
  --color-electrical: var(--color-accent-yellow);
  --color-digital:    var(--color-accent-electric);
  --color-success:    var(--color-accent-green);
  --color-danger:     #EF4444;

  /* Typography */
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:    'Space Grotesk', 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;

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

  /* Layout */
  --container-max: 1200px;
  --container-pad: 1.5rem;

  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:  0 10px 25px rgba(0,0,0,.1), 0 4px 10px rgba(0,0,0,.08);
  --shadow-xl:  0 20px 40px rgba(0,0,0,.15), 0 8px 16px rgba(0,0,0,.1);
  --shadow-glow-electric: 0 0 30px rgba(0, 212, 255, 0.25);
  --shadow-glow-yellow:   0 0 30px rgba(245, 166, 35, 0.25);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
  --transition-bounce: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Section padding */
  --section-py: 5rem;
}

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

/* Skip-to-content — accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10000;
  padding: 0.75rem 1.5rem;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: var(--text-sm);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  text-decoration: none;
  transition: top 0.15s;
}
.skip-link:focus {
  top: 0;
  outline: 3px solid #fff;
  outline-offset: 2px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-gray-900);
  background-color: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border-width: 0;
}

/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-gray-900);
}

h1 { font-size: clamp(2.5rem, 6vw, var(--text-7xl)); }
h2 { font-size: clamp(1.875rem, 4vw, var(--text-5xl)); }
h3 { font-size: clamp(1.25rem, 2.5vw, var(--text-2xl)); }
h4 { font-size: var(--text-xl); font-weight: 700; }

p { line-height: 1.7; color: var(--color-gray-700); }

.section-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-electric);
  background: rgba(0, 212, 255, 0.1);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 212, 255, 0.2);
  margin-bottom: var(--space-4);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-16);
}

.section-header h2 { margin-bottom: var(--space-4); }

.section-desc {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
  line-height: 1.7;
}

/* ============================================================
   4. LAYOUT UTILITIES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.section-padding {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
}

/* ============================================================
   5. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after { opacity: 1; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

/* Primary */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(26, 43, 95, 0.4);
}
.btn-primary:hover {
  box-shadow: 0 8px 25px rgba(26, 43, 95, 0.5);
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* WhatsApp */
.btn-whatsapp {
  background: linear-gradient(135deg, #25D366, #128C7E);
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
}
.btn-whatsapp:hover {
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.55);
}

/* Email */
.btn-email {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(26, 43, 95, 0.4);
}
.btn-email:hover {
  box-shadow: 0 8px 25px rgba(26, 43, 95, 0.5);
}

/* Electrical */
.btn-electrical {
  background: linear-gradient(135deg, #F5A623, #E08A00);
  color: var(--color-dark);
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(245, 166, 35, 0.4);
}
.btn-electrical:hover {
  box-shadow: 0 8px 25px rgba(245, 166, 35, 0.5);
}

/* Digital */
.btn-digital {
  background: linear-gradient(135deg, #00D4FF, #0099CC);
  color: var(--color-dark);
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
}
.btn-digital:hover {
  box-shadow: 0 8px 25px rgba(0, 212, 255, 0.5);
}

/* Sizes */
.btn-lg  { padding: 0.875rem 2rem; font-size: var(--text-lg); border-radius: var(--radius-lg); }
.btn-xl  { padding: 1.1rem 2.2rem; font-size: var(--text-lg); border-radius: var(--radius-lg); min-width: 240px; }

.btn-xl span {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}
.btn-xl strong { font-size: var(--text-base); }
.btn-xl small  { font-size: var(--text-sm); opacity: 0.85; font-weight: 400; }
.btn-xl i { font-size: 1.5rem; }

/* ============================================================
   6. NAVIGATION
   ============================================================ */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition-base);
}

.nav-header.scrolled {
  background: rgba(13, 17, 23, 0.97);
  box-shadow: var(--shadow-lg);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-white);
  flex-shrink: 0;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-accent-yellow), #E08A00);
  border-radius: var(--radius-md);
  color: var(--color-dark);
  font-size: 1rem;
  box-shadow: 0 2px 8px rgba(245, 166, 35, 0.4);
}

.logo-icon-sm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--color-accent-yellow), #E08A00);
  border-radius: 6px;
  color: var(--color-dark);
  font-size: 0.75rem;
}

.logo-text { color: var(--color-white); }
.logo-accent { color: var(--color-accent-electric); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex: 1;
  justify-content: center;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--color-accent-electric);
  transition: width var(--transition-base);
}

.nav-links a:hover { color: var(--color-white); }
.nav-links a:hover::after { width: 100%; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   7. HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-dark);
  overflow: hidden;
  padding-top: 72px;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 60%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(26, 43, 95, 0.5) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  right: -5%;
  width: 50%;
  height: 60%;
  background: radial-gradient(ellipse, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-top: var(--space-12);
  padding-bottom: var(--space-20);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-electric);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-8);
}

.hero-brand-eb {
  color: #ffffff;
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
}

.hero-brand-corp {
  color: #C9A84C;
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
  margin-left: 0.25em;
}

.hero-tagline-sub {
  display: block;
  color: rgba(255,255,255,0.5);
  font-size: clamp(0.65rem, 1.5vw, 0.8rem);
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-top: var(--space-4);
  margin-bottom: 0;
}

.hero-sub {
  font-size: clamp(var(--text-lg), 2.5vw, var(--text-xl));
  color: rgba(255,255,255,0.55);
  max-width: 600px;
  margin: var(--space-6) auto var(--space-10);
  line-height: 1.7;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-16);
}

.hero-split {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.hero-split-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-8);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(8px);
  transition: all var(--transition-base);
  color: rgba(255,255,255,0.7);
  font-weight: 600;
  font-size: var(--text-sm);
}

.hero-split-card:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-4px);
}

.hero-split-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.hero-split-icon.electrical {
  background: linear-gradient(135deg, rgba(245, 166, 35, 0.2), rgba(245, 166, 35, 0.05));
  color: var(--color-accent-yellow);
  border: 1px solid rgba(245, 166, 35, 0.3);
}

.hero-split-icon.digital {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 212, 255, 0.05));
  color: var(--color-accent-electric);
  border: 1px solid rgba(0, 212, 255, 0.3);
}

.hero-split-divider {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-accent-electric);
  opacity: 0.4;
}

.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255,255,255,0.25);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(0, 212, 255, 0.5), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* Particles */
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

/* ============================================================
   8. STATS BAR
   ============================================================ */
.stats-bar {
  background: var(--color-dark-2);
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-10) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: var(--space-6);
}

.stat-item {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.stat-number {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
}

.stat-suffix {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--color-accent-electric);
  line-height: 1;
}

.stat-label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.45);
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: rgba(255,255,255,0.1);
}

/* ============================================================
   9. PAIN POINTS
   ============================================================ */
.pain-points {
  background: var(--color-gray-100);
}

.pain-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-8);
  align-items: center;
}

.pain-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  border-top: 4px solid;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.pain-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.pain-electrical { border-top-color: var(--color-accent-yellow); }
.pain-digital    { border-top-color: var(--color-accent-electric); }

.pain-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: var(--space-4);
}

.pain-electrical .pain-icon {
  background: rgba(245, 166, 35, 0.12);
  color: var(--color-accent-yellow);
  border: 1px solid rgba(245, 166, 35, 0.2);
}

.pain-digital .pain-icon {
  background: rgba(0, 212, 255, 0.1);
  color: var(--color-accent-electric);
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.pain-card h3 {
  font-size: var(--text-xl);
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}

.pain-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.pain-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-gray-700);
  line-height: 1.5;
}

.pain-list .fa-times-circle { color: var(--color-danger); margin-top: 2px; flex-shrink: 0; }

.pain-center {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6);
}

.pain-center-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-white);
  box-shadow: 0 8px 24px rgba(26, 43, 95, 0.35);
}

.pain-center p {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-gray-700);
  max-width: 180px;
  text-align: center;
  line-height: 1.5;
}

/* ============================================================
   10. SOLUTION
   ============================================================ */
.solution {
  background: var(--color-dark);
  position: relative;
  overflow: hidden;
}

.solution::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 40%;
  height: 100%;
  background: radial-gradient(ellipse at top right, rgba(0, 212, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.solution-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.solution-content .section-tag { margin-bottom: var(--space-4); }

.solution-content h2 {
  color: var(--color-white);
  margin-bottom: var(--space-6);
}

.solution-desc {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.solution-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.solution-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: rgba(255,255,255,0.8);
  font-size: var(--text-base);
}

.solution-check {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: rgba(0, 200, 150, 0.15);
  border: 1px solid rgba(0, 200, 150, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-green);
  font-size: 0.6rem;
  margin-top: 2px;
}

/* Solution Diagram */
.solution-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.solution-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  width: 100%;
  max-width: 320px;
}

.diagram-node {
  width: 100%;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-white);
  text-align: left;
  line-height: 1.3;
}

.diagram-node i {
  font-size: 1.75rem;
  flex-shrink: 0;
}

.node-electrical {
  background: rgba(245, 166, 35, 0.1);
  border: 1px solid rgba(245, 166, 35, 0.25);
}
.node-electrical i { color: var(--color-accent-yellow); }

.node-digital {
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
}
.node-digital i { color: var(--color-accent-electric); }

.diagram-bridge {
  display: flex;
  align-items: center;
  width: 100%;
  gap: var(--space-3);
}

.bridge-line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.4), transparent);
}

.bridge-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 700;
}

.diagram-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  color: rgba(255,255,255,0.3);
}

.result-box {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: rgba(0, 200, 150, 0.1);
  border: 1px solid rgba(0, 200, 150, 0.25);
  border-radius: var(--radius-xl);
  color: var(--color-accent-green);
  font-weight: 700;
  font-size: var(--text-base);
}

/* ============================================================
   11. SERVICES
   ============================================================ */
.services {
  background: var(--color-white);
}

.services-dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.service-pillar {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.service-pillar:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.pillar-header {
  padding: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-white);
}

.pillar-header h3 { color: var(--color-white); font-size: var(--text-2xl); }
.pillar-header p  { color: rgba(255,255,255,0.7); font-size: var(--text-sm); font-weight: 500; margin-top: 2px; }

.pillar-electrical .pillar-header {
  background: linear-gradient(135deg, #1A2B5F, #0F1A3D);
}

.pillar-digital .pillar-header {
  background: linear-gradient(135deg, #003A6E, #001F3F);
}

.pillar-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.pillar-electrical .pillar-icon {
  background: rgba(245, 166, 35, 0.2);
  color: var(--color-accent-yellow);
  border: 1px solid rgba(245, 166, 35, 0.3);
}

.pillar-digital .pillar-icon {
  background: rgba(0, 212, 255, 0.15);
  color: var(--color-accent-electric);
  border: 1px solid rgba(0, 212, 255, 0.25);
}

.service-list {
  flex: 1;
  padding: var(--space-6) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--color-white);
}

.service-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-gray-100);
  transition: background var(--transition-fast);
}

.service-item:last-child { border-bottom: none; }

.service-item:hover {
  background: var(--color-gray-100);
  margin: 0 calc(-1 * var(--space-8));
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}

.service-item > i {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.pillar-electrical .service-item > i {
  background: rgba(245, 166, 35, 0.1);
  color: var(--color-accent-yellow);
}

.pillar-digital .service-item > i {
  background: rgba(0, 212, 255, 0.08);
  color: var(--color-accent-electric);
}

.service-item div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.service-item strong {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-900);
}

.service-item span {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

.service-pillar .btn {
  margin: var(--space-6) var(--space-8) var(--space-8);
  justify-content: center;
}

/* ============================================================
   12. PROCESS
   ============================================================ */
.process {
  background: var(--color-dark-2);
  position: relative;
  overflow: hidden;
}

.process::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.02) 1px, transparent 1px);
  background-size: 80px 80px;
}

.process-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: relative;
  z-index: 1;
}

.process-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 700;
  color: rgba(0, 212, 255, 0.08);
  line-height: 1;
  margin-bottom: var(--space-2);
  letter-spacing: -0.03em;
}

.step-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-accent-electric);
  margin-bottom: var(--space-4);
  transition: all var(--transition-base);
}

.process-step:hover .step-icon {
  background: rgba(0, 212, 255, 0.2);
  box-shadow: var(--shadow-glow-electric);
  transform: scale(1.05);
}

.step-content h3 {
  color: var(--color-white);
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.step-content p {
  color: rgba(255,255,255,0.5);
  font-size: var(--text-sm);
  max-width: 240px;
  margin: 0 auto;
}

.process-connector {
  flex-shrink: 0;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, rgba(0, 212, 255, 0.2), rgba(0, 212, 255, 0.4), rgba(0, 212, 255, 0.2));
  margin-top: 76px;
  position: relative;
}

.process-connector::after {
  content: '';
  position: absolute;
  right: -6px;
  top: -4px;
  border: 5px solid transparent;
  border-left-color: rgba(0, 212, 255, 0.4);
}

/* ============================================================
   13. PROJECTS
   ============================================================ */
.projects {
  background: var(--color-white);
}

.projects-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
  justify-content: center;
}

.tab-btn {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-500);
  background: var(--color-gray-100);
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.tab-btn:hover {
  color: var(--color-primary);
  background: rgba(26, 43, 95, 0.06);
}

.tab-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.project-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.project-card.hidden { display: none; }

.project-img {
  height: 180px;
  position: relative;
  overflow: hidden;
}

/* Project thumbnails — placeholder hasta reemplazar con fotos reales
   Cada uno muestra el ícono del tipo de proyecto centrado sobre el gradiente.
   Para reemplazar: añade background-image: url('...') en el elemento HTML
   directamente usando el atributo style="background-image:url('tu-foto.jpg')" */

.project-img::before {
  content: attr(data-icon);
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) translateY(-12px);
  font-size: 2.5rem;
  opacity: 0.18;
  pointer-events: none;
  z-index: 0;
  color: white;
}

.project-img-1 {
  background: linear-gradient(135deg, #1A2B5F 0%, #2A3F8F 60%, #3A5000 100%);
}
.project-img-2 {
  background: linear-gradient(135deg, #001F3F 0%, #003A6E 60%, #005F50 100%);
}
.project-img-3 {
  background: linear-gradient(135deg, #0F1A3D 0%, #1A2B5F 55%, #2A1500 100%);
}
.project-img-4 {
  background: linear-gradient(135deg, #001228 0%, #002855 55%, #003A6E 100%);
}
.project-img-5 {
  background: linear-gradient(135deg, #1A0F00 0%, #3D2200 50%, #1A2B5F 100%);
}
.project-img-dual {
  background: linear-gradient(135deg, #0F1A3D 0%, #1A2B5F 35%, #003A6E 70%, #00253A 100%);
}

/* Shimmer line + label decoration on project thumbnails */
.project-img::after {
  content: attr(data-label);
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) translateY(16px);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
}

/* When no data-label (fallback): shimmer top line */
.project-img:not([data-label])::after {
  content: '';
  top: 0; left: 0; right: 0;
  transform: none;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  font-size: 0;
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.6) 100%);
  display: flex;
  align-items: flex-end;
  padding: var(--space-4);
}

.project-tag {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(26, 43, 95, 0.85);
  color: var(--color-accent-electric);
  backdrop-filter: blur(4px);
}

.project-tag-dual {
  background: rgba(0, 0, 0, 0.7);
  background: linear-gradient(135deg, rgba(245, 166, 35, 0.9), rgba(0, 212, 255, 0.9));
  color: var(--color-dark);
}

.project-info {
  padding: var(--space-5) var(--space-6);
}

.project-info h4 {
  font-size: var(--text-base);
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
  font-weight: 700;
}

.project-info p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: 1.5;
  margin-bottom: var(--space-3);
}

.project-meta {
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-gray-400, #9CA3AF);
  font-weight: 500;
}

.project-meta i { color: var(--color-accent-electric); margin-right: 3px; }

.project-card-dual {
  grid-column: span 1;
  border: 2px solid;
  border-image: linear-gradient(135deg, var(--color-accent-yellow), var(--color-accent-electric)) 1;
}

.projects-cta {
  text-align: center;
  margin-top: var(--space-12);
}

/* ============================================================
   14. TESTIMONIALS
   ============================================================ */
.testimonials {
  background: var(--color-gray-100);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  font-size: 5rem;
  line-height: 1;
  color: var(--color-gray-100);
  font-family: serif;
  pointer-events: none;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.testimonial-stars {
  display: flex;
  gap: 3px;
  color: var(--color-accent-yellow);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.testimonial-card p {
  font-size: var(--text-base);
  color: var(--color-gray-700);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  font-style: italic;
  position: relative;
  z-index: 1;
}

.testimonial-card footer {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.testimonial-card footer strong {
  font-size: var(--text-sm);
  color: var(--color-gray-900);
  font-weight: 700;
}

.testimonial-card footer span {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

/* ============================================================
   15. CTA FINAL
   ============================================================ */
.cta-final {
  background: var(--color-dark);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-bg-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 43, 95, 0.4) 0%, transparent 70%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-yellow);
  background: rgba(245, 166, 35, 0.1);
  border: 1px solid rgba(245, 166, 35, 0.2);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

.cta-final h2 {
  color: var(--color-white);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  margin-bottom: var(--space-4);
}

.cta-final p {
  color: rgba(255,255,255,0.55);
  font-size: var(--text-lg);
  margin-bottom: var(--space-10);
  line-height: 1.7;
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.cta-trust {
  display: flex;
  gap: var(--space-8);
  justify-content: center;
  flex-wrap: wrap;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.4);
  font-weight: 500;
}

.cta-trust .fa-check-circle { color: var(--color-accent-green); }

/* ============================================================
   15b. FAQ
   ============================================================ */
.faq {
  background: var(--color-gray-100);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.faq-item:hover {
  border-color: rgba(0, 212, 255, 0.3);
}

.faq-item[open] {
  border-color: rgba(0, 212, 255, 0.4);
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.08);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-dark);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color var(--transition-fast);
}

.faq-question::-webkit-details-marker { display: none; }

.faq-question:hover {
  color: var(--color-primary);
}

.faq-icon {
  font-size: 0.7rem;
  color: rgba(0, 212, 255, 0.6);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 var(--space-6) var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================================
   16. FOOTER
   ============================================================ */
.footer {
  background: var(--color-dark);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand .nav-logo {
  margin-bottom: var(--space-4);
  display: inline-flex;
}

.footer-brand p {
  color: rgba(255,255,255,0.4);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.5);
  font-size: var(--text-base);
  border: 1px solid rgba(255,255,255,0.08);
  transition: all var(--transition-base);
}

.footer-social a:hover {
  background: var(--color-primary-light);
  color: var(--color-white);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
}

.footer-col h3 {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: var(--space-6);
}

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

.footer-col ul a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  transition: color var(--transition-fast);
}

.footer-col ul a:hover { color: var(--color-white); }

.footer-contact li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
}

.footer-contact i { color: var(--color-accent-electric); width: 14px; }
.footer-contact a { color: rgba(255,255,255,0.55); transition: color var(--transition-fast); }
.footer-contact a:hover { color: var(--color-white); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.25);
}

/* ============================================================
   17. WHATSAPP FLOATING BUTTON
   ============================================================ */
.whatsapp-fab {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 90;
  width: 58px;
  height: 58px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #25D366, #128C7E);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
  transition: all var(--transition-bounce);
}

.whatsapp-fab:hover {
  transform: scale(1.1) translateY(-3px);
  box-shadow: 0 8px 30px rgba(37, 211, 102, 0.65);
}

.fab-tooltip {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-dark);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
  box-shadow: var(--shadow-md);
}

.fab-tooltip::after {
  content: '';
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-left-color: var(--color-dark);
}

.whatsapp-fab:hover .fab-tooltip { opacity: 1; }

/* FAB pulse ring — draws attention without being annoying */
.whatsapp-fab::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: rgba(37, 211, 102, 0.35);
  animation: fabPulse 2.5s ease-out infinite;
  pointer-events: none;
}

@keyframes fabPulse {
  0%   { transform: scale(1);   opacity: 0.7; }
  70%  { transform: scale(1.7); opacity: 0; }
  100% { transform: scale(1.7); opacity: 0; }
}

/* ============================================================
   17b. COOKIE CONSENT BANNER
   ============================================================ */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: rgba(13, 17, 23, 0.97);
  border-top: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cookie-banner.visible {
  transform: translateY(0);
}

.cookie-banner p {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
  margin: 0;
  flex: 1;
  min-width: 220px;
}

.cookie-banner p a {
  color: var(--color-accent-electric);
  text-decoration: underline;
}

.cookie-banner-actions {
  display: flex;
  gap: var(--space-3);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.cookie-accept {
  padding: 0.5rem 1.25rem;
  background: var(--color-accent-electric);
  color: var(--color-dark);
  font-size: var(--text-sm);
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.cookie-accept:hover { opacity: 0.85; }

.cookie-reject {
  padding: 0.5rem 1.25rem;
  background: transparent;
  color: rgba(255,255,255,0.45);
  font-size: var(--text-sm);
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cookie-reject:hover { color: rgba(255,255,255,0.75); border-color: rgba(255,255,255,0.35); }

/* ============================================================
   18. ANIMATIONS & AOS
   ============================================================ */

/* Scroll reveal */
[data-aos] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos="fade-right"] { transform: translateX(-24px); }
[data-aos="fade-left"]  { transform: translateX(24px); }
[data-aos="fade-down"]  { transform: translateY(-24px); }

[data-aos].aos-animate {
  opacity: 1;
  transform: translate(0, 0);
}

/* Keyframes */
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50%       { opacity: 0.8; transform: scaleY(1.2); }
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.6; }
}

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

/* ============================================================
   19. RESPONSIVE
   ============================================================ */

/* Large screens */
@media (min-width: 1280px) {
  :root { --container-max: 1280px; }
}

/* Medium → Tablet */
@media (max-width: 1024px) {
  .services-dual { grid-template-columns: 1fr; max-width: 600px; margin: 0 auto; }
  .solution-inner { grid-template-columns: 1fr; gap: var(--space-12); }
  .solution-visual { order: -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
  .pain-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .pain-center { order: -1; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .stat-divider { display: none; }
}

/* Tablet → Mobile */
@media (max-width: 768px) {
  :root {
    --section-py: 3.5rem;
    --container-pad: 1.25rem;
  }

  /* Nav */
  .nav-links {
    display: none;
    position: fixed;
    top: 72px;
    left: 0; right: 0;
    background: rgba(13, 17, 23, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: var(--space-8) var(--space-6);
    gap: var(--space-6);
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-size: var(--text-lg);
    color: rgba(255,255,255,0.9);
  }

  .nav-toggle { display: flex; }

  /* Hero */
  .hero-split {
    flex-direction: column;
    gap: var(--space-3);
  }

  .hero-split-divider { transform: rotate(90deg); }

  .hero-split-card {
    width: 100%;
    max-width: 280px;
    flex-direction: row;
    gap: var(--space-4);
  }

  /* Stats */
  .stats-grid { grid-template-columns: 1fr 1fr; gap: var(--space-6); }
  .stat-divider { display: none; }

  /* Process */
  .process-steps { flex-direction: column; align-items: center; gap: var(--space-8); }
  .process-connector { width: 2px; height: 40px; margin-top: 0; }
  .process-connector::after {
    top: auto;
    right: auto;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-left-color: transparent;
    border-top-color: rgba(0, 212, 255, 0.4);
  }

  /* Projects */
  .projects-grid { grid-template-columns: 1fr; }

  /* Testimonials */
  .testimonials-grid { grid-template-columns: 1fr; }

  /* FAQ */
  .faq-grid { grid-template-columns: 1fr; }

  /* CTA */
  .cta-buttons { flex-direction: column; align-items: center; }
  .btn-xl { min-width: unset; width: 100%; max-width: 380px; justify-content: center; }
  .cta-trust { gap: var(--space-4); }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-brand { grid-column: span 1; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* Small Mobile */
@media (max-width: 480px) {
  .hero-cta-group { flex-direction: column; align-items: center; }
  .hero-cta-group .btn-lg { width: 100%; max-width: 320px; justify-content: center; }
  .projects-tabs { flex-wrap: wrap; }
  .cookie-banner { flex-direction: column; align-items: flex-start; }
  .cookie-banner-actions { width: 100%; }
  .cookie-accept, .cookie-reject { flex: 1; text-align: center; }
}

/* ============================================================
   20. ACCESSIBILITY — prefers-reduced-motion
   ============================================================ */
@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;
  }

  [data-aos] {
    opacity: 1 !important;
    transform: none !important;
  }

  .whatsapp-fab::before { animation: none; }
}