/* ===== VARIABLES ===== */
:root {
  /* Colors */
  --primary-color: #00d4ff;
  --secondary-color: #0066cc;
  --accent-color: #ff6b6b;
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #00d4ff 0%, #0066cc 100%);
  --gradient-hero: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #667eea 100%);
  
  /* Dark Theme Colors */
  --bg-primary: #0a0e1a;
  --bg-secondary: #1a1f2e;
  --bg-card: #252a3d;
  --text-primary: #ffffff;
  --text-secondary: #b8c5d1;
  --text-muted: #8a9bab;
  
  /* Shadows */
  --shadow-light: 0 2px 10px rgba(0, 212, 255, 0.1);
  --shadow-medium: 0 8px 25px rgba(0, 212, 255, 0.15);
  --shadow-heavy: 0 15px 40px rgba(0, 212, 255, 0.2);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

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

html {
  scroll-behavior: smooth;
}

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

/* ===== UTILITIES ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

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

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

.btn--secondary:hover {
  background: var(--primary-color);
  color: white;
}

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

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(10, 14, 26, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.brand__text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
}

.brand__subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: -4px;
}

.nav__menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav__link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-normal);
  position: relative;
}

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

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-secondary);
  transition: width var(--transition-normal);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  cursor: pointer;
}

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

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="grid" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="rgba(0,212,255,0.1)"/><stop offset="100%" stop-color="transparent"/></radialGradient></defs><pattern id="smallGrid" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M 20 0 L 0 0 0 20" fill="none" stroke="rgba(0,212,255,0.1)" stroke-width="1"/></pattern><rect width="100%" height="100%" fill="url(%23smallGrid)"/></svg>');
  opacity: 0.3;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

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

.hero__description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

.hero__cta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

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

.hero__graphic {
  position: relative;
  width: 400px;
  height: 400px;
}

.floating-element {
  position: absolute;
  border-radius: 50%;
  background: var(--gradient-secondary);
  animation: float 6s ease-in-out infinite;
}

.element-1 {
  top: 10%;
  left: 10%;
  width: 60px;
  height: 60px;
  animation-delay: 0s;
}

.element-2 {
  top: 20%;
  right: 15%;
  width: 40px;
  height: 40px;
  animation-delay: 1s;
}

.element-3 {
  bottom: 30%;
  left: 20%;
  width: 80px;
  height: 80px;
  animation-delay: 2s;
}

.element-4 {
  bottom: 10%;
  right: 10%;
  width: 50px;
  height: 50px;
  animation-delay: 3s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(180deg);
  }
}

/* ===== SECTION STYLES ===== */
.section__header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section__subtitle {
  display: inline-block;
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.section__title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--text-primary);
}

/* ===== ABOUT SECTION ===== */
.about {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-secondary);
}

.about__content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.about__text h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.about__text p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

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

.feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 212, 255, 0.1);
  transition: all var(--transition-normal);
}

.feature:hover {
  transform: translateX(10px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-medium);
}

.feature i {
  font-size: var(--font-size-xl);
  color: var(--primary-color);
  min-width: 40px;
}

.feature h4 {
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

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

.about__stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.stat {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 212, 255, 0.1);
}

.stat__number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.stat__label {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== SERVICES SECTION ===== */
.services {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-primary);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
}

.service__card {
  background: var(--bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(0, 212, 255, 0.1);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-secondary);
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
}

.service__card:hover::before {
  transform: translateX(0);
}

.service__card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-heavy);
  border-color: var(--primary-color);
}

.service__icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-secondary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.service__icon i {
  font-size: var(--font-size-2xl);
  color: white;
}

.service__card:hover .service__icon {
  transform: scale(1.1) rotate(5deg);
}

.service__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.service__description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.service__features {
  list-style: none;
}

.service__features li {
  padding: var(--spacing-xs) 0;
  color: var(--text-muted);
  position: relative;
  padding-left: var(--spacing-lg);
}

.service__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* ===== CONTACT SECTION ===== */
.contact {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-secondary);
}

.contact__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
}

.contact__info h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-xl);
}

.contact__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 212, 255, 0.1);
  transition: all var(--transition-normal);
}

.contact__item:hover {
  border-color: var(--primary-color);
  transform: translateX(10px);
}

.contact__item i {
  font-size: var(--font-size-xl);
  color: var(--primary-color);
  min-width: 40px;
}

.contact__item h4 {
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.contact__item p {
  color: var(--text-secondary);
  margin: 0;
}

.contact__form h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-xl);
}

.form__group {
  margin-bottom: var(--spacing-md);
}

.form__input {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid rgba(0, 212, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  transition: all var(--transition-normal);
}

.form__input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form__input::placeholder {
  color: var(--text-muted);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-primary);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer__brand h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xl);
}

.footer__brand p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.footer__links h4,
.footer__contact h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.footer__links ul {
  list-style: none;
}

.footer__links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.footer__links a:hover {
  color: var(--primary-color);
}

.footer__contact p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.footer__contact i {
  color: var(--primary-color);
  width: 20px;
}

.footer__bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.footer__bottom p {
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .about__content {
    grid-template-columns: 1fr;
  }
  
  .contact__content {
    grid-template-columns: 1fr;
  }
  
  .hero__cta {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .nav__menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: var(--bg-secondary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: left var(--transition-normal);
  }
  
  .nav__menu.show {
    left: 0;
  }
  
  .nav__toggle {
    display: block;
  }
  
  .hero__title {
    font-size: var(--font-size-4xl);
  }
  
  .section__title {
    font-size: var(--font-size-2xl);
  }
  
  .services__grid {
    grid-template-columns: 1fr;
  }
  
  .hero__cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .hero__title {
    font-size: var(--font-size-3xl);
  }
  
  .hero__graphic {
    width: 300px;
    height: 300px;
  }
  
  .about__stats {
    grid-template-columns: 1fr;
  }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* ===== SCROLL ANIMATIONS ===== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}