@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&family=Space+Grotesk:wght@700&display=swap');

:root {
  /* Color Palette */
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --text-primary: #f2f2f2;
  --text-secondary: #a3a3a3;
  --accent: #007BFF;
  --accent-hover: #0056b3;
  --accent-rgb: 0, 123, 255;
  
  /* Glass-morphism */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-blur: blur(16px);
  
  /* Legacy theme variables for compatibility */
  --color-primary: #007BFF;
  --color-secondary: #0056b3;
  --color-light-gray: rgba(255, 255, 255, 0.1);
  --color-gray: #a3a3a3;
  --color-white: #ffffff;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-headings: 'Space Grotesk', sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  
  /* Spacing */
  --section-padding: clamp(4rem, 8vw, 8rem);
  --container-max: 1200px;
  
  /* Animations */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4rem;
}

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

/* Typography Scale */
h1, h2, h3 {
    font-family: var(--font-headings);
}

h1 {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: var(--font-weight-bold);
  line-height: 0.9;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

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

p {
  font-size: clamp(1rem, 2vw, 1.125rem);
  font-weight: var(--font-weight-regular);
  color: var(--text-secondary);
  max-width: 60ch;
}

/* Glass-morphism Components */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: 1rem;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Smooth Scroll Sections */
section {
  min-height: 100vh;
  padding: var(--section-padding) 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Links */
a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition-smooth);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 0.5rem;
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

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

.btn--ghost {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.btn--ghost:hover {
  background: var(--accent);
  color: white;
}

/* Utilities */
.text-accent { color: var(--accent); }
.text-center { text-align: center; }
.text-thin { font-weight: var(--font-weight-regular); }
.text-bold { font-weight: var(--font-weight-bold); }

.fade-in {
  opacity: 0;
  transform: translateY(2rem);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Loading State */
.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: opacity 0.5s ease;
}

.loading.hidden {
  opacity: 0;
  pointer-events: none;
}

/* Accessibility & Performance */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Loading optimizations */
img {
  loading: lazy;
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --section-padding: clamp(2rem, 5vw, 4rem);
  }
  
  .container {
    padding: 0 1rem;
  }
  
  /* Mobile-specific optimizations */
  section {
    min-height: auto;
  }
}