/* ============================================
   DAVID CALLES - AI CV LANDING PAGE
   Design System & Styles
   ============================================ */

/* CSS Variables - Color Palette from Logo */
:root {
  /* Primary Colors */
  --primary-dark: #0D1B2A;
  --primary: #1E3A5F;
  --primary-light: #2E4A6F;

  /* Accent Colors (from logo) */
  --accent-blue: #4A90D9;
  --accent-green: #7CB342;
  --accent-orange: #E67E22;
  --accent-magenta: #C2185B;

  /* Neutral Colors */
  --white: #FFFFFF;
  --gray-100: #F8F9FA;
  --gray-200: #E9ECEF;
  --gray-300: #DEE2E6;
  --gray-400: #CED4DA;
  --gray-500: #ADB5BD;
  --gray-600: #6C757D;
  --gray-700: #495057;
  --gray-800: #343A40;
  --gray-900: #212529;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0D1B2A 0%, #1E3A5F 100%);
  --gradient-accent: linear-gradient(135deg, #4A90D9 0%, #C2185B 100%);
  --gradient-card: linear-gradient(135deg, rgba(30, 58, 95, 0.8) 0%, rgba(13, 27, 42, 0.9) 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', var(--font-primary);

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

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

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(74, 144, 217, 0.3);
  --shadow-glow-orange: 0 0 40px rgba(230, 126, 34, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Z-index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-tooltip: 400;

  /* Theme colors (dark mode default) */
  --bg-primary: #0D1B2A;
  --bg-secondary: #1E3A5F;
  --bg-card: linear-gradient(135deg, rgba(30, 58, 95, 0.8) 0%, rgba(13, 27, 42, 0.9) 100%);
  --bg-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  --text-primary: #FFFFFF;
  --text-secondary: #DEE2E6;
  --text-muted: #ADB5BD;
  --border-color: rgba(74, 144, 217, 0.2);
  --border-hover: rgba(74, 144, 217, 0.4);
  --nav-bg: rgba(13, 27, 42, 0.8);
  --nav-bg-scroll: rgba(13, 27, 42, 0.95);
}

/* Light Mode Theme */
body.light-mode {
  --bg-primary: #F8FAFC;
  --bg-secondary: #F1F5F9;
  --bg-card: linear-gradient(135deg, rgba(255, 255, 255, 1) 0%, rgba(248, 250, 252, 1) 100%);
  --bg-glass: rgba(255, 255, 255, 0.7);
  --text-primary: #111827;
  --text-secondary: #374151;
  --text-muted: #6B7280;
  --border-color: rgba(30, 58, 95, 0.1);
  --border-hover: rgba(30, 58, 95, 0.2);
  --nav-bg: rgba(255, 255, 255, 0.9);
  --nav-bg-scroll: rgba(255, 255, 255, 0.98);

  /* Adjusted shadows for light mode */
  --shadow-glow: 0 0 40px rgba(74, 144, 217, 0.1);
  --shadow-card: 0 8px 30px rgba(30, 58, 95, 0.08);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  transition: background var(--transition-base), color var(--transition-base);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-orange);
}

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  background-image:
    linear-gradient(rgba(74, 144, 217, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 144, 217, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% {
    transform: translate(0, 0);
  }

  100% {
    transform: translate(50px, 50px);
  }
}

.bg-particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent-blue);
  border-radius: 50%;
  opacity: 0.3;
  animation: float 15s infinite ease-in-out;
}

.particle:nth-child(odd) {
  background: var(--accent-magenta);
}

.particle:nth-child(3n) {
  background: var(--accent-green);
}

.particle:nth-child(5n) {
  background: var(--accent-orange);
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0) translateX(0);
    opacity: 0.3;
  }

  25% {
    transform: translateY(-100px) translateX(50px);
    opacity: 0.6;
  }

  50% {
    transform: translateY(-200px) translateX(-30px);
    opacity: 0.3;
  }

  75% {
    transform: translateY(-100px) translateX(20px);
    opacity: 0.5;
  }
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-md) var(--space-xl);
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-base);
}

.nav.scrolled {
  padding: var(--space-sm) var(--space-xl);
  background: var(--nav-bg-scroll);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.nav-logo img {
  height: 40px;
  width: auto;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(74, 144, 217, 0.1);
}

.nav-cta {
  padding: var(--space-sm) var(--space-lg) !important;
  background: var(--gradient-accent) !important;
  color: var(--white) !important;
  border-radius: var(--radius-full) !important;
}

.nav-cta:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}

.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-mobile-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

/* Theme Toggle Button */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  margin: 0 var(--space-md);
}

.theme-toggle:hover {
  background: rgba(74, 144, 217, 0.1);
  border-color: var(--accent-blue);
}

.theme-icon {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Default state (dark mode): Moon visible, Sun hidden */
.theme-toggle .sun {
  opacity: 0;
  transform: rotate(90deg);
}

.theme-toggle .moon {
  opacity: 1;
  transform: rotate(0deg);
}

/* Light mode state: Sun visible, Moon hidden */
body.light-mode .theme-toggle .sun {
  opacity: 1;
  transform: rotate(0deg);
}

body.light-mode .theme-toggle .moon {
  opacity: 0;
  transform: rotate(-90deg);
}

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

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(74, 144, 217, 0.15) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.hero-content {
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(124, 179, 66, 0.1);
  border: 1px solid rgba(124, 179, 66, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--accent-green);
  margin-bottom: var(--space-lg);
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}

.hero h1 {
  margin-bottom: var(--space-lg);
}

.hero h1 .gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 500px;
}

.hero-ctas {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

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

.hero-highlight {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.hero-highlight svg {
  width: 20px;
  height: 20px;
  color: var(--accent-green);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-orb {
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  animation: orbFloat 6s ease-in-out infinite;
}

@keyframes orbFloat {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-20px);
  }
}

.hero-orb::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 1px solid rgba(74, 144, 217, 0.2);
  animation: orbRotate 10s linear infinite;
}

@keyframes orbRotate {
  0% {
    transform: rotate(0deg) scale(1.1);
  }

  100% {
    transform: rotate(360deg) scale(1.1);
  }
}

.hero-orb img {
  width: 200px;
  height: auto;
  filter: drop-shadow(0 0 30px rgba(74, 144, 217, 0.5));
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--white);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(74, 144, 217, 0.5);
  color: var(--white);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(74, 144, 217, 0.1);
  border-color: var(--accent-blue);
  color: var(--text-primary);
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* ============================================
   TRUST BAR
   ============================================ */
.trust-bar {
  background: var(--bg-secondary);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-lg) var(--space-xl);
}

.trust-bar-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.trust-item:hover {
  background: rgba(74, 144, 217, 0.1);
}

.trust-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  color: var(--white);
}

.trust-icon svg {
  width: 24px;
  height: 24px;
}

.trust-content {
  display: flex;
  flex-direction: column;
}

.trust-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.trust-value {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

/* ============================================
   SECTIONS BASE
   ============================================ */
.section {
  padding: var(--space-4xl) var(--space-xl);
  position: relative;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

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

.section-header p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ============================================
   VALUE PROPS SECTION
   ============================================ */
.value-props-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.value-card {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.value-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.value-card:hover {
  transform: translateY(-5px);
  border-color: rgba(74, 144, 217, 0.4);
  box-shadow: var(--shadow-glow);
}

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

.value-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(74, 144, 217, 0.1);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
  color: var(--accent-blue);
}

.value-icon svg {
  width: 28px;
  height: 28px;
}

.value-card h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.value-card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Different accent colors for variety */
.value-card:nth-child(2) .value-icon {
  color: var(--accent-green);
  background: rgba(124, 179, 66, 0.1);
}

.value-card:nth-child(3) .value-icon {
  color: var(--accent-orange);
  background: rgba(230, 126, 34, 0.1);
}

.value-card:nth-child(4) .value-icon {
  color: var(--accent-magenta);
  background: rgba(194, 24, 91, 0.1);
}

.value-card:nth-child(5) .value-icon {
  color: var(--accent-blue);
  background: rgba(74, 144, 217, 0.1);
}

.value-card:nth-child(6) .value-icon {
  color: var(--accent-green);
  background: rgba(124, 179, 66, 0.1);
}

/* ============================================
   CAPABILITIES SECTION
   ============================================ */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.capability-group {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-card);
}

.capability-group:hover {
  border-color: rgba(74, 144, 217, 0.4);
}

.capability-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.capability-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  color: #FFFFFF;
}

.capability-icon svg {
  width: 24px;
  height: 24px;
}

.capability-group h4 {
  margin-bottom: 0;
  font-size: 1.1rem;
}

.capability-list {
  list-style: none;
}

.capability-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.capability-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-green);
  border-radius: 50%;
  margin-top: 8px;
  flex-shrink: 0;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.project-header {
  padding: var(--space-2xl);
  background: linear-gradient(135deg, rgba(74, 144, 217, 0.1) 0%, rgba(194, 24, 91, 0.1) 100%);
  border-bottom: 1px solid rgba(74, 144, 217, 0.1);
}

.project-header h3 {
  margin-bottom: var(--space-sm);
}

.project-tagline {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.project-domains {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.domain-tag {
  padding: var(--space-xs) var(--space-md);
  background: rgba(74, 144, 217, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--accent-blue);
}

.project-content {
  padding: var(--space-2xl);
}

.project-overview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.overview-item h5 {
  font-size: 0.85rem;
  color: var(--accent-orange);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.overview-item p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

.project-pipeline {
  margin-bottom: var(--space-2xl);
}

.project-pipeline h4 {
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}

.pipeline-steps {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.pipeline-steps::before {
  content: '';
  position: absolute;
  top: 24px;
  left: 40px;
  right: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-green), var(--accent-orange), var(--accent-magenta));
  z-index: 0;
}

.pipeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  z-index: 1;
}

.pipeline-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border: 2px solid var(--accent-blue);
  border-radius: 50%;
  color: var(--accent-blue);
  transition: all var(--transition-base);
}

.pipeline-step:hover .pipeline-icon {
  background: var(--accent-blue);
  color: var(--white);
  transform: scale(1.1);
}

.pipeline-icon svg {
  width: 20px;
  height: 20px;
}

.pipeline-step span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.project-capabilities h4 {
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}

.capabilities-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.capability-tag {
  padding: var(--space-sm) var(--space-md);
  background: rgba(124, 179, 66, 0.1);
  border: 1px solid rgba(124, 179, 66, 0.3);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--accent-green);
}

/* ============================================
   METHODOLOGY SECTION
   ============================================ */
.methodology-timeline {
  display: flex;
  justify-content: space-between;
  position: relative;
  padding-top: var(--space-xl);
}

.methodology-timeline::before {
  content: '';
  position: absolute;
  top: calc(var(--space-xl) + 28px);
  left: 10%;
  right: 10%;
  height: 3px;
  background: var(--gradient-accent);
}

.method-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 18%;
  z-index: 1;
}

.method-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border: 3px solid var(--accent-blue);
  border-radius: 50%;
  color: var(--accent-blue);
  margin-bottom: var(--space-md);
  transition: all var(--transition-base);
}

.method-step:hover .method-icon {
  background: var(--accent-blue);
  color: var(--white);
  transform: scale(1.1);
}

.method-icon svg {
  width: 24px;
  height: 24px;
}

.method-step h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.method-details {
  list-style: none;
}

.method-details li {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}

.skill-tag {
  padding: var(--space-sm) var(--space-lg);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: all var(--transition-base);
  cursor: default;
  box-shadow: var(--shadow-sm);
}

.skill-tag:hover {
  border-color: var(--accent-blue);
  background: rgba(74, 144, 217, 0.2);
  transform: translateY(-2px);
}

.skill-tag:nth-child(odd):hover {
  border-color: var(--accent-green);
  background: rgba(124, 179, 66, 0.2);
}

.skill-tag:nth-child(3n):hover {
  border-color: var(--accent-orange);
  background: rgba(230, 126, 34, 0.2);
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
.experience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.experience-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-card);
}

.experience-card:hover {
  border-color: rgba(74, 144, 217, 0.4);
  transform: translateY(-3px);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
}

.experience-date {
  padding: var(--space-xs) var(--space-md);
  background: rgba(230, 126, 34, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--accent-orange);
}

.experience-card h4 {
  margin-bottom: var(--space-xs);
}

.experience-company {
  color: var(--accent-blue);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.experience-list {
  list-style: none;
}

.experience-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.experience-list li::before {
  content: '→';
  color: var(--accent-green);
  flex-shrink: 0;
}

/* ============================================
   EDUCATION SECTION
   ============================================ */
.education-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  display: flex;
  gap: var(--space-2xl);
  align-items: center;
  box-shadow: var(--shadow-card);
}

.education-icon {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: var(--radius-xl);
  color: var(--white);
  flex-shrink: 0;
}

.education-icon svg {
  width: 40px;
  height: 40px;
}

.education-content h4 {
  margin-bottom: var(--space-xs);
}

.education-institution {
  color: var(--accent-blue);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.education-details {
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.education-specialties,
.education-achievements {
  flex: 1;
  min-width: 200px;
}

.education-specialties h5,
.education-achievements h5 {
  font-size: 0.85rem;
  color: var(--accent-orange);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.education-specialties ul,
.education-achievements ul {
  list-style: none;
}

.education-specialties li,
.education-achievements li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: var(--space-xs) 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.education-specialties li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-blue);
  border-radius: 50%;
}

.education-achievements li::before {
  content: '★';
  color: var(--accent-orange);
}

/* ============================================
   QUIZ SECTION
   ============================================ */
.quiz-container {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.quiz-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
}

.quiz-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.quiz-header h3 {
  margin-bottom: var(--space-sm);
}

.quiz-header p {
  color: var(--text-secondary);
}

.quiz-progress {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.quiz-progress-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(74, 144, 217, 0.3);
  transition: all var(--transition-base);
}

.quiz-progress-dot.active {
  background: var(--accent-blue);
  box-shadow: 0 0 10px var(--accent-blue);
}

.quiz-progress-dot.correct {
  background: var(--accent-green);
}

.quiz-progress-dot.incorrect {
  background: var(--accent-magenta);
}

.quiz-question {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.quiz-category {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: rgba(230, 126, 34, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--accent-orange);
  margin-bottom: var(--space-md);
}

.quiz-question h4 {
  font-size: 1.3rem;
  color: var(--text-primary);
  max-width: 700px;
  margin: 0 auto;
}

.quiz-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.quiz-option {
  padding: var(--space-lg);
  background: var(--bg-glass);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: left;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.quiz-option:hover {
  background: rgba(74, 144, 217, 0.1);
  border-color: var(--accent-blue);
  transform: translateY(-2px);
}

.quiz-option.selected {
  border-color: var(--accent-blue);
  background: rgba(74, 144, 217, 0.2);
}

.quiz-option.correct {
  border-color: var(--accent-green);
  background: rgba(124, 179, 66, 0.2);
}

.quiz-option.incorrect {
  border-color: var(--accent-magenta);
  background: rgba(194, 24, 91, 0.2);
}

.quiz-feedback {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-xl);
  display: none;
}

.quiz-feedback.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.quiz-feedback.correct {
  background: rgba(124, 179, 66, 0.1);
  border: 1px solid rgba(124, 179, 66, 0.3);
}

.quiz-feedback.incorrect {
  background: rgba(194, 24, 91, 0.1);
  border: 1px solid rgba(194, 24, 91, 0.3);
}

.quiz-feedback h5 {
  margin-bottom: var(--space-sm);
}

.quiz-feedback.correct h5 {
  color: var(--accent-green);
}

.quiz-feedback.incorrect h5 {
  color: var(--accent-magenta);
}

.quiz-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

.quiz-result {
  text-align: center;
  display: none;
}

.quiz-result.show {
  display: block;
}

.quiz-score {
  font-size: 4rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
}

.quiz-message {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

/* ============================================
   FAQ SECTION
   ============================================ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-card);
}

.faq-item:hover {
  border-color: rgba(74, 144, 217, 0.4);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg);
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(74, 144, 217, 0.2);
  color: var(--accent-blue);
  transition: all var(--transition-base);
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  background: var(--accent-blue);
  color: var(--white);
}

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

.faq-item.active .faq-answer {
  max-height: 200px;
}

.faq-answer p {
  padding: 0 var(--space-lg) var(--space-lg);
  margin-bottom: 0;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

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

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  color: var(--white);
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-text {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.contact-value {
  color: var(--text-primary);
  font-weight: 500;
}

.contact-form-container {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-card);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  background: rgba(74, 144, 217, 0.1);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-privacy {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

/* Form feedback messages */
.form-message {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  font-size: 0.95rem;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.form-message-success {
  background: rgba(124, 179, 66, 0.15);
  border: 1px solid rgba(124, 179, 66, 0.3);
  color: var(--accent-green);
}

.form-message-error {
  background: rgba(230, 126, 34, 0.15);
  border: 1px solid rgba(230, 126, 34, 0.3);
  color: var(--accent-orange);
}

/* Disabled button state */
.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
}

.footer p {
  color: var(--text-muted);
  margin-bottom: 0;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    order: 2;
  }

  .hero-visual {
    order: 1;
  }

  .hero-orb {
    width: 300px;
    height: 300px;
  }

  .hero-subtitle {
    margin: 0 auto var(--space-xl);
  }

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

  .hero-highlights {
    align-items: center;
  }

  .trust-bar-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .value-props-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .project-overview {
    grid-template-columns: 1fr;
  }

  .pipeline-steps {
    flex-wrap: wrap;
    gap: var(--space-lg);
  }

  .pipeline-steps::before {
    display: none;
  }

  .methodology-timeline {
    flex-wrap: wrap;
    gap: var(--space-xl);
  }

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

  .method-step {
    width: 45%;
  }

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

  .education-card {
    flex-direction: column;
    text-align: center;
  }

  .quiz-options {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(13, 27, 42, 0.98);
    padding: var(--space-lg);
    border-top: 1px solid rgba(74, 144, 217, 0.1);
  }

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

  .nav-mobile-toggle {
    display: flex;
  }

  .trust-bar-container {
    grid-template-columns: 1fr;
  }

  .value-props-grid {
    grid-template-columns: 1fr;
  }

  .method-step {
    width: 100%;
  }

  .section {
    padding: var(--space-2xl) var(--space-md);
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.5rem;
  }
}

/* ============================================
   PRINT STYLES (for CV purposes)
   ============================================ */
@media print {

  .bg-grid,
  .bg-particles,
  .nav,
  .quiz-container,
  .hero-visual,
  .btn,
  .contact-form-container {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .section {
    padding: 1rem;
    page-break-inside: avoid;
  }

  h1,
  h2,
  h3,
  h4 {
    color: #1E3A5F;
  }

  p,
  li {
    color: #333;
  }
}