/* AI Stratejist - Modern IT Services Design System */

/* === ROOT VARIABLES === */
:root {
  /* Primary Colors */
  --color-dark-blue: #0F1B3C;
  --color-deep-navy: #1A237E;
  --color-midnight-blue: #0D1B2A;
  
  /* Accent Colors */
  --color-cyan: #00D4FF;
  --color-electric-blue: #00BCD4;
  --color-bright-turquoise: #1DE9B6;
  --color-vibrant-purple: #9C27B0;
  
  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-light-gray: #F5F5F5;
  --color-medium-gray: #9E9E9E;
  --color-dark-gray: #424242;
  
  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0F1B3C 0%, #1A237E 50%, #9C27B0 100%);
  --gradient-card: linear-gradient(145deg, #1E3A8A 0%, #312E81 100%);
  --gradient-button: linear-gradient(90deg, #00D4FF 0%, #00BCD4 100%);
  --gradient-text: linear-gradient(90deg, #00D4FF 0%, #1DE9B6 100%);
  
  /* Typography */
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-headings: 'Poppins', 'Inter', sans-serif;
  --font-monospace: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Font Sizes */
  --font-size-hero: clamp(2.5rem, 5vw, 4rem);
  --font-size-h1: clamp(2rem, 4vw, 3rem);
  --font-size-h2: clamp(1.5rem, 3vw, 2.25rem);
  --font-size-h3: clamp(1.25rem, 2.5vw, 1.75rem);
  --font-size-body: 1rem;
  --font-size-small: 0.875rem;
  --font-size-caption: 0.75rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-section: clamp(3rem, 8vw, 6rem);
  
  /* Layout */
  --container-max-width: 1200px;
  --header-height: 70px;
  
  /* Shadows */
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 20px 60px rgba(0, 212, 255, 0.2);
  --shadow-button: 0 8px 25px rgba(0, 212, 255, 0.3);
  
  /* Transitions */
  --transition-smooth: all 0.3s ease;
  --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--color-white);
  background: var(--gradient-hero);
  min-height: 100vh;
  overflow-x: hidden;
}

/* === BACKGROUND ANIMATION === */
.background-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.floating-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(2px 2px at 20px 30px, rgba(255, 255, 255, 0.1), transparent),
    radial-gradient(2px 2px at 40px 70px, rgba(0, 212, 255, 0.2), transparent),
    radial-gradient(1px 1px at 90px 40px, rgba(29, 233, 182, 0.1), transparent),
    radial-gradient(1px 1px at 130px 80px, rgba(156, 39, 176, 0.1), transparent);
  background-repeat: repeat;
  background-size: 200px 200px;
  animation: floatParticles 20s linear infinite;
}

@keyframes floatParticles {
  0% { transform: translateY(0) translateX(0); }
  25% { transform: translateY(-100px) translateX(50px); }
  50% { transform: translateY(-200px) translateX(-50px); }
  75% { transform: translateY(-150px) translateX(100px); }
  100% { transform: translateY(0) translateX(0); }
}

/* === LAYOUT === */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* === HEADER === */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 27, 60, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  height: var(--header-height);
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-headings);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  font-size: 1.5rem;
}

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

.nav-menu {
  display: flex;
  gap: var(--spacing-xl);
}

.nav-link {
  color: var(--color-white);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-cyan);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-button);
  border-radius: 1px;
}

.nav-utilities {
  display: flex;
  gap: var(--spacing-md);
}

.btn-secondary-nav {
  background: transparent;
  color: var(--color-cyan);
  border: 2px solid var(--color-cyan);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 500;
  transition: var(--transition-smooth);
  cursor: pointer;
}

.btn-secondary-nav:hover {
  background: var(--color-cyan);
  color: var(--color-dark-blue);
  transform: translateY(-2px);
}

.btn-primary-nav {
  background: var(--gradient-button);
  color: var(--color-white);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 500;
  transition: var(--transition-smooth);
  cursor: pointer;
}

.btn-primary-nav:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-button);
}

/* === HERO SECTION === */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-4xl);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

.hero-eyebrow {
  color: var(--color-cyan);
  font-size: var(--font-size-small);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
}

.hero-title {
  font-family: var(--font-headings);
  font-size: var(--font-size-hero);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
}

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

.hero-description {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.75;
  margin-bottom: var(--spacing-2xl);
  max-width: 90%;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
  align-items: center;
}

.btn-primary {
  background: var(--gradient-button);
  color: var(--color-white);
  border: none;
  padding: 0.875rem 2rem;
  border-radius: 6px;
  font-size: var(--font-size-body);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-button);
}

.btn-arrow {
  width: 16px;
  height: 16px;
  transition: var(--transition-smooth);
}

.btn-primary:hover .btn-arrow {
  transform: translateX(4px);
}

.btn-play {
  background: rgba(0, 212, 255, 0.2);
  color: var(--color-cyan);
  border: 2px solid var(--color-cyan);
  padding: 0.875rem 1.5rem;
  border-radius: 50px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-play:hover {
  background: var(--color-cyan);
  color: var(--color-dark-blue);
  transform: translateY(-2px);
}

.play-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-icon svg {
  width: 12px;
  height: 12px;
}

.hero-stats {
  display: flex;
  gap: var(--spacing-3xl);
}

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

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-cyan);
  font-family: var(--font-headings);
}

.stat-label {
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.7);
}

/* === HERO VISUAL === */
.hero-visual {
  position: relative;
}

.visual-container {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-illustration {
  position: relative;
  width: 100%;
  height: 100%;
}

.main-illustration {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 20px 40px rgba(0, 212, 255, 0.3));
}

.floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.floating-element {
  position: absolute;
  font-size: 2rem;
  animation: floatElement 3s ease-in-out infinite;
}

.element-1 {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.element-2 {
  top: 60%;
  right: 15%;
  animation-delay: 0.5s;
}

.element-3 {
  bottom: 20%;
  left: 20%;
  animation-delay: 1s;
}

.element-4 {
  top: 30%;
  right: 30%;
  animation-delay: 1.5s;
}

@keyframes floatElement {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(10deg); }
}

/* === SERVICES SECTION === */
.services-section {
  padding: var(--spacing-section) 0;
  background: rgba(26, 35, 126, 0.1);
  backdrop-filter: blur(20px);
}

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

.section-eyebrow {
  color: var(--color-cyan);
  font-size: var(--font-size-small);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-family: var(--font-headings);
  font-size: var(--font-size-h2);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

.section-description {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
}

.service-card {
  background: rgba(30, 58, 138, 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: var(--spacing-2xl);
  min-height: 280px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-button);
  transform: scaleX(0);
  transition: var(--transition-smooth);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(0, 212, 255, 0.3);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-lg);
  background: var(--gradient-button);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
}

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

.service-title {
  font-family: var(--font-headings);
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-white);
}

.service-description {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  flex-grow: 1;
}

.service-link {
  color: var(--color-cyan);
  text-decoration: none;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: var(--transition-smooth);
}

.service-link:hover {
  gap: var(--spacing-md);
}

.service-link svg {
  width: 16px;
  height: 16px;
  transition: var(--transition-smooth);
}

/* === FOOTER === */
.main-footer {
  background: var(--color-dark-blue);
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-4xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-headings);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

.footer-description {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
}

.footer-section h4 {
  font-family: var(--font-headings);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
}

.footer-section a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  margin-bottom: var(--spacing-sm);
  transition: var(--transition-smooth);
}

.footer-section a:hover {
  color: var(--color-cyan);
}

.footer-bottom {
  padding-top: var(--spacing-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: rgba(255, 255, 255, 0.7);
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.footer-legal a:hover {
  color: var(--color-cyan);
}

/* === MODAL STYLES === */
.modal {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
}

.modal-content {
  background: var(--gradient-card);
  margin: 10% auto;
  padding: var(--spacing-xl) var(--spacing-3xl);
  border-radius: 15px;
  width: 90%;
  max-width: 500px;
  min-height: auto;
  position: relative;
  animation: modalSlideIn 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.close {
  color: rgba(255, 255, 255, 0.7);
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  position: absolute;
  right: 20px;
  top: 15px;
  transition: var(--transition-smooth);
}

.close:hover {
  color: var(--color-cyan);
}

.modal-content h2 {
  text-align: center;
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
  font-family: var(--font-headings);
}

.modal-content form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.modal-content input {
  padding: var(--spacing-md);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  font-size: var(--font-size-body);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  transition: var(--transition-smooth);
}

.modal-content input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.modal-content input:focus {
  outline: none;
  border-color: var(--color-cyan);
  background: rgba(255, 255, 255, 0.15);
}

.modal-content button {
  padding: var(--spacing-md);
  background: var(--gradient-button);
  color: var(--color-white);
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.modal-content button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-button);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    text-align: center;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .visual-container {
    height: 300px;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .nav-container {
    padding: 0 var(--spacing-md);
  }
  
  .nav-utilities {
    gap: var(--spacing-sm);
  }
  
  .btn-secondary-nav,
  .btn-primary-nav {
    padding: 0.4rem 0.8rem;
    font-size: var(--font-size-small);
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
  }
  
  .btn-primary,
  .btn-play {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .modal-content {
    margin: 20% auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    max-width: 450px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .hero-section {
    padding: calc(var(--header-height) + var(--spacing-lg)) 0 var(--spacing-2xl);
  }
  
  .floating-element {
    font-size: 1.5rem;
  }
}

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

/* === SMOOTH SCROLLING === */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* === FOCUS STATES === */
*:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
}