/* Ultrathink Design System - Black & Navy Theme */
:root {
  --black-primary: #0A0A0B;
  --navy-secondary: #0F172A;
  --navy-dark: #0C1222;
  --blue-accent: #3B82F6;
  --blue-light: #60A5FA;
  --white: #FFFFFF;
  --gray-light: #E5E7EB;
  --gray-medium: #9CA3AF;
  --gradient-hero: linear-gradient(135deg, #0A0A0B 0%, #0F172A 50%, #0C1222 100%);
  --gradient-card: linear-gradient(145deg, #0F172A 0%, #0C1222 100%);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.3);
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--black-primary);
  color: var(--white);
  line-height: 1.6;
  font-feature-settings: 'cv11', 'ss01';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }

/* Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation */
.nav-header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(10, 10, 11, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--white);
}

.nav-logo img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--blue-accent);
}

.nav-logo-text h1 {
  font-size: 1.25rem;
  font-weight: 700;
}

.nav-logo-text p {
  font-size: 0.875rem;
  color: var(--gray-light);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--gray-light);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--blue-accent);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--blue-accent);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--blue-accent) 0%, transparent 70%);
  opacity: 0.1;
  transform: translate(-50%, -50%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.1); }
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(59, 130, 246, 0.2);
  border: 1px solid var(--blue-accent);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  color: var(--blue-light);
  margin-bottom: 2rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--white) 0%, var(--blue-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--gray-light);
  margin-bottom: 3rem;
  max-width: 700px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--blue-accent);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  background: var(--blue-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--blue-accent);
  color: var(--blue-accent);
}

/* Domain Cards */
.domains {
  padding: 5rem 0;
  background: var(--navy-secondary);
}

.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.domain-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.3s ease;
  cursor: pointer;
}

.domain-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
  border-color: var(--blue-accent);
}

.domain-icon {
  width: 60px;
  height: 60px;
  background: rgba(59, 130, 246, 0.2);
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.domain-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.domain-card p {
  color: var(--gray-light);
  margin-bottom: 1.5rem;
}

.domain-stats {
  display: flex;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--blue-accent);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-medium);
}

/* Blog Grid */
.blog-section {
  padding: 5rem 0;
  background: var(--black-primary);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.blog-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  overflow: hidden;
  transition: all 0.3s ease;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
  border-color: var(--blue-accent);
}

.blog-card-header {
  padding: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.blog-category {
  padding: 0.25rem 0.75rem;
  background: rgba(59, 130, 246, 0.2);
  border-radius: 9999px;
  font-size: 0.75rem;
  color: var(--blue-light);
}

.blog-date {
  color: var(--gray-medium);
  font-size: 0.875rem;
}

.blog-card-body {
  padding: 1.5rem;
}

.blog-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--white);
}

.blog-card p {
  color: var(--gray-light);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.blog-link {
  color: var(--blue-accent);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap 0.3s ease;
}

.blog-link:hover {
  gap: 1rem;
}

/* About Section */
.about-section {
  padding: 5rem 0;
  background: var(--navy-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}

.about-image {
  position: relative;
}

.about-image img {
  width: 100%;
  max-width: 400px;
  border-radius: 1rem;
  border: 3px solid var(--blue-accent);
  box-shadow: var(--shadow-glow);
}

.about-text h2 {
  margin-bottom: 2rem;
}

.about-text p {
  color: var(--gray-light);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.expertise-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.tag {
  padding: 0.5rem 1rem;
  background: rgba(59, 130, 246, 0.2);
  border: 1px solid var(--blue-accent);
  border-radius: 0.5rem;
  font-size: 0.875rem;
  color: var(--blue-light);
}

/* Footer */
.footer {
  background: var(--navy-dark);
  padding: 3rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--gray-light);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* Responsive */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
}