/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color Variables - Light Theme */
  --navy: #1e293b;
  --cobalt-blue: #1e40af;
  --electric-blue: #0ea5e9;
  --cyber-mint: #06b6d4;
  --tech-green: #10b981;
  --light-gray: #f8fafc;
  --medium-gray: #64748b;
  --dark-gray: #334155;
  --white: #ffffff;

  /* Theme Variables */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #ffffff;
  --text-primary: #334155;
  --text-secondary: #64748b;
  --text-inverse: #ffffff;
  --border-color: rgba(30, 64, 175, 0.1);
  --card-shadow: rgba(30, 64, 175, 0.08);
  --header-bg: rgba(255, 255, 255, 0.95);

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    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: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

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

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Dark Theme */
[data-theme="dark"] {
  --navy: #0f172a;
  --light-gray: #1e293b;
  --medium-gray: #94a3b8;
  --dark-gray: #f1f5f9;
  --white: #0f172a;

  /* Dark Theme Variables */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-inverse: #0f172a;
  --logo-inverse: rgb(46, 43, 89);
  --border-color: rgba(148, 163, 184, 0.2);
  --card-shadow: rgba(0, 0, 0, 0.3);
  --header-bg: rgba(15, 23, 42, 0.95);
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  transition: background-color var(--transition-base),
    color var(--transition-base);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background-color var(--transition-base);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon img {
  width: 150px;
  border-radius: 8px;
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--logo-inverse);
  transition: color var(--transition-base);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-8);
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-base);
}

.nav-menu a:hover {
  color: var(--cobalt-blue);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  color: var(--text-primary);
}

.theme-toggle:hover {
  border-color: var(--cobalt-blue);
  color: var(--cobalt-blue);
}

.language-selector {
  position: relative;
  display: inline-block;
}

.language-toggle {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 20px;
  padding: var(--spacing-2) var(--spacing-4);
  cursor: pointer;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.language-toggle:hover {
  border-color: var(--cobalt-blue);
  color: var(--cobalt-blue);
}

.language-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 4px 24px var(--card-shadow);
  min-width: 120px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  z-index: 1000;
}

.language-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-option {
  display: block;
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: none;
  background: none;
  text-align: left;
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color var(--transition-base);
  font-size: var(--font-size-sm);
}

.language-option:hover {
  background: var(--bg-secondary);
}

.language-option.active {
  background: var(--cobalt-blue);
  color: white;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  gap: var(--spacing-1);
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-base);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(
    135deg,
    var(--bg-secondary) 0%,
    rgba(30, 64, 175, 0.05) 100%
  );
  padding-top: 80px;
  transition: background var(--transition-base);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
  align-items: center;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-6);
  color: var(--text-primary);
}

.gradient-text {
  background: linear-gradient(135deg, var(--cobalt-blue), var(--cyber-mint));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-4);
  font-weight: 500;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-8);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-4);
}

.btn {
  padding: var(--spacing-4) var(--spacing-8);
  border: none;
  border-radius: 8px;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cobalt-blue), var(--electric-blue));
  color: white;
  box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 64, 175, 0.4);
}

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

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

/* Hero Visual */
.visual-container {
  position: relative;
  height: 400px;
  width: 100%;
}

.network-nodes {
  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto;
}

.node {
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--cobalt-blue);
  animation: pulse 2s infinite;
}

.node-1 {
  top: 60px;
  left: 60px;
  background: var(--cobalt-blue);
  animation-delay: 0s;
}
.node-2 {
  top: 90px;
  right: 60px;
  background: var(--electric-blue);
  animation-delay: 0.4s;
}
.node-3 {
  bottom: 90px;
  right: 100px;
  background: var(--cyber-mint);
  animation-delay: 0.8s;
}
.node-4 {
  bottom: 60px;
  left: 100px;
  background: var(--tech-green);
  animation-delay: 1.2s;
}
.node-5 {
  top: 120px;
  left: 150px;
  background: var(--cobalt-blue);
  animation-delay: 1.6s;
}

.connections {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

.connection {
  stroke: var(--electric-blue);
  stroke-width: 2;
  opacity: 0.6;
  animation: flow 3s infinite;
}

.digital-terrace {
  position: absolute;
  bottom: 0;
  right: 0;
  display: flex;
  align-items: end;
  gap: var(--spacing-2);
}

.terrace-step {
  width: 20px;
  background: linear-gradient(135deg, var(--electric-blue), var(--cyber-mint));
  border-radius: 2px;
  animation: grow 1.5s ease infinite;
}

.step-1 {
  height: 20px;
  animation-delay: 0s;
}
.step-2 {
  height: 40px;
  animation-delay: 0.2s;
}
.step-3 {
  height: 60px;
  animation-delay: 0.4s;
}
.step-4 {
  height: 80px;
  animation-delay: 0.6s;
}

/* Section Styles */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-16);
}

.section-header h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
}

/* About Section */
.about {
  padding: var(--spacing-20) 0;
  background: var(--bg-primary);
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-8);
}

.card {
  background: var(--bg-tertiary);
  padding: var(--spacing-8);
  border-radius: 16px;
  box-shadow: 0 4px 24px var(--card-shadow);
  text-align: center;
  transition: transform var(--transition-base),
    background-color var(--transition-base);
}

.card:hover {
  transform: translateY(-8px);
}

.card-icon {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-6);
}

.card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

.card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Services Section */
.services {
  padding: var(--spacing-20) 0;
  background: var(--bg-secondary);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-8);
}

.service-card {
  background: var(--bg-tertiary);
  padding: var(--spacing-8);
  border-radius: 16px;
  box-shadow: 0 4px 24px var(--card-shadow);
  position: relative;
  transition: transform var(--transition-base),
    background-color var(--transition-base);
}

.service-card:hover {
  transform: translateY(-8px);
}

.service-number {
  position: absolute;
  top: -16px;
  left: var(--spacing-8);
  background: linear-gradient(135deg, var(--cobalt-blue), var(--electric-blue));
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-lg);
}

.service-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--spacing-6) 0 var(--spacing-4);
}

.service-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-6);
  line-height: 1.7;
}

.service-card ul {
  list-style: none;
}

.service-card li {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2);
  position: relative;
  padding-left: var(--spacing-6);
}

.service-card li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--tech-green);
  font-weight: bold;
}

/* Portfolio Section */
.portfolio {
  padding: var(--spacing-20) 0;
  background: var(--bg-primary);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-8);
}

.portfolio-item {
  background: var(--bg-tertiary);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 24px var(--card-shadow);
  transition: transform var(--transition-base),
    background-color var(--transition-base);
}

.portfolio-item:hover {
  transform: translateY(-8px);
}

.portfolio-image {
  height: 200px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio-placeholder {
  opacity: 0.7;
}

.portfolio-content {
  padding: var(--spacing-6);
}

.portfolio-content h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

.portfolio-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-6);
  line-height: 1.7;
}

.portfolio-tags {
  display: flex;
  gap: var(--spacing-2);
  flex-wrap: wrap;
}

.tag {
  background: rgba(30, 64, 175, 0.1);
  color: var(--cobalt-blue);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: 20px;
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* Contact Section */
.contact {
  padding: var(--spacing-20) 0;
  background: var(--bg-secondary);
}

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

.contact-info h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

.contact-info p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-8);
  line-height: 1.7;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  color: var(--text-secondary);
}

.contact-icon {
  color: var(--cobalt-blue);
}

.contact-form {
  background: var(--bg-tertiary);
  padding: var(--spacing-8);
  border-radius: 16px;
  box-shadow: 0 4px 24px var(--card-shadow);
}

.form-group {
  margin-bottom: var(--spacing-6);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-4);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: var(--font-size-base);
  transition: border-color var(--transition-base);
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--cobalt-blue);
}

/* Footer */
.footer {
  background: var(--navy);
  color: var(--text-inverse);
  padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
  margin-bottom: var(--spacing-8);
}

.footer-logo img {
  width: 300px;
}

.footer-logo .logo-text {
  color: var(--logo-inverse);
}

.footer-logo p {
  color: rgba(255, 255, 255, 0.7);
  margin-top: var(--spacing-2);
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr 1.5fr;
  gap: var(--spacing-8);
  padding: 30px;
}

.footer-section h4 {
  color: var(--text-inverse);
  font-weight: 600;
  margin-bottom: var(--spacing-4);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-2);
}

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

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

/* Footer Info Styles */
.footer-info li {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-6);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
}

/* Animations */
@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.8;
  }
}

@keyframes flow {
  0% {
    stroke-dasharray: 0 100;
  }
  100% {
    stroke-dasharray: 100 0;
  }
}

@keyframes grow {
  0%,
  100% {
    transform: scaleY(1);
  }
  50% {
    transform: scaleY(1.1);
  }
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.animate-in {
  animation: fadeInUp 0.8s ease forwards;
}

body.loaded {
  animation: fadeIn 0.5s ease;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-tertiary);
    flex-direction: column;
    padding: var(--spacing-4);
    box-shadow: 0 4px 24px var(--card-shadow);
  }

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

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

  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-8);
  }

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

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-links {
    grid-template-columns: 1fr;
    justify-content: center;
  }

  .about-cards,
  .services-grid,
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 var(--spacing-4);
  }

  .section-header h2 {
    font-size: var(--font-size-3xl);
  }

  .contact-info h2 {
    font-size: var(--font-size-3xl);
  }

  .nav-controls {
    gap: var(--spacing-2);
  }

  .theme-toggle,
  .language-toggle {
    font-size: var(--font-size-xs);
    padding: var(--spacing-2);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .btn {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-sm);
  }

  .visual-container {
    height: 300px;
  }

  .network-nodes {
    width: 250px;
    height: 250px;
  }
}

.portfolio-category {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-color);
  color: white;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.portfolio-item img {
  transition: transform 0.3s ease;
}

.portfolio-item:hover img {
  transform: scale(1.05);
}