:root {
  /* Premium Color Palette */
  --pk-primary: #2563eb;       /* Vibrant Blue */
  --pk-primary-dark: #1e40af;
  --pk-secondary: #0f172a;     /* Deep Navy */
  --pk-accent: #38bdf8;        /* Sky Blue */
  --pk-text: #334155;          /* Slate 700 */
  --pk-text-light: #64748b;    /* Slate 500 */
  --pk-bg: #f8fafc;            /* Slate 50 */
  --pk-white: #ffffff;
  
  /* Gradients */
  --pk-gradient-main: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
  --pk-gradient-hero: linear-gradient(to right, #0f172a, #1e293b);
  
  /* Shadows */
  --pk-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --pk-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --pk-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --pk-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', sans-serif;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--pk-secondary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

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

.btn-primary:hover {
  background: var(--pk-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--pk-shadow-lg);
}

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

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  padding: 1rem 0;
}

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

.logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--pk-secondary);
}

.logo span {
  color: var(--pk-primary);
}

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

.nav-link {
  font-weight: 500;
  color: var(--pk-text);
}

.nav-link:hover {
  color: var(--pk-primary);
}

/* Hero Section */
.hero {
  padding: 8rem 0 4rem;
  background: var(--pk-gradient-hero);
  color: var(--pk-white);
  text-align: center; 
}

.hero h1 {
  color: var(--pk-white);
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero p {
  color: #94a3b8;
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

/* Features/Services Grid */
.section {
  padding: 5rem 0;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

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

.card {
  background: var(--pk-white);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: var(--pk-shadow-md);
  transition: transform 0.3s ease;
  border: 1px solid rgba(0,0,0,0.05);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--pk-shadow-xl);
}

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

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

/* Footer */
.footer {
  background: var(--pk-secondary);
  color: var(--pk-white);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer h4 {
  color: var(--pk-white);
  margin-bottom: 1.5rem;
}

.footer ul {
  list-style: none;
}

.footer li {
  margin-bottom: 0.75rem;
}

.footer a {
  color: #94a3b8;
}

.footer a:hover {
  color: var(--pk-white);
}

.copyright {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2rem;
  text-align: center;
  color: #64748b;
  font-size: 0.875rem;
}

/* Utilities */
.text-center { text-align: center; }
.mb-4 { margin-bottom: 1rem; }
.text-primary { color: var(--pk-primary); }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
  .grid { grid-template-columns: 1fr; }
}