/* Premium Dark Mode Design - Senior Systems Thinker */

:root {
  /* Dark Mode Colors */
  --bg-primary: #0a0a0a;
  --bg-secondary: #121212;
  --bg-tertiary: #1a1a1a;
  
  /* Text Colors */
  --text-primary: #e8e8e8;
  --text-secondary: #a0a0a0;
  --text-muted: #6b6b6b;
  
  /* Accent - Muted Gold for Authority */
  --accent: #c9a961;
  --accent-hover: #d4b872;
  --accent-dark: #a88d4f;
  
  /* Alternative - Electric Blue */
  --blue-accent: #5b8dee;
  --blue-hover: #6c9df0;
  
  /* Borders & Dividers */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Premium Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.7;
  color: var(--text-secondary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Smooth Transitions */
button, a, .card {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Mouse Follow Gradient Effect */
.cursor-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(circle, rgba(201, 169, 97, 0.08) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

body:hover .cursor-glow {
  opacity: 1;
}

/* Animated Grid Background */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.3;
  animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
  0% { transform: translateY(0); }
  100% { transform: translateY(80px); }
}

/* System Lines Pattern */
.system-lines {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(45deg, transparent 48%, rgba(201, 169, 97, 0.03) 49%, rgba(201, 169, 97, 0.03) 51%, transparent 52%);
  background-size: 120px 120px;
  opacity: 0.4;
}

/* Section Spacing */
section {
  padding: 6rem 1.5rem;
}

@media (min-width: 768px) {
  section {
    padding: 8rem 2rem;
  }
}

@media (min-width: 1024px) {
  section {
    padding: 10rem 3rem;
  }
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
}

/* Premium Button Styles */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(201, 169, 97, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* Card Styles */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 4px;
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* Parallax Sections */
.parallax-section {
  position: relative;
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
}

/* Fade Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Stagger animation delay */
.stagger-1 { animation-delay: 0.1s; opacity: 0; }
.stagger-2 { animation-delay: 0.2s; opacity: 0; }
.stagger-3 { animation-delay: 0.3s; opacity: 0; }
.stagger-4 { animation-delay: 0.4s; opacity: 0; }

/* Divider */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  margin: 4rem 0;
}

/* Focus States */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* Selection */
::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* Nav Styles */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-weight: 500;
}

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

/* Mobile Menu Button */
.mobile-menu-button {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-primary);
}

.mobile-menu-button svg {
  width: 24px;
  height: 24px;
}

/* Mobile Nav */
@media (max-width: 768px) {
  .mobile-menu-button {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links a:hover {
    background: var(--bg-secondary);
  }
}

/* Price Tag */
.price {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
}

/* Badge */
.badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: rgba(201, 169, 97, 0.1);
  color: var(--accent);
  border: 1px solid rgba(201, 169, 97, 0.2);
  border-radius: 2px;
}

/* Exclusivity Badge */
.badge-exclusive {
  background: linear-gradient(135deg, rgba(201, 169, 97, 0.15), rgba(201, 169, 97, 0.05));
  border-color: var(--accent);
  color: var(--accent);
}

/* Authority Grid */
.authority-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

/* Framework Blocks */
.framework-block {
  padding: 2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent);
  transition: all 0.3s ease;
}

.framework-block:hover {
  border-left-width: 6px;
  transform: translateX(8px);
  background: var(--bg-tertiary);
}

/* Hero Specific */
.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 800px;
}