/* ============================================
   Phyonic Website - Design System
   ============================================ */

:root {
  /* Colors */
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --surface-border: #2a2a2a;
  --text-primary: #ffffff;
  --text-secondary: #aaaaaa;
  --accent-primary: #7b2fff;
  --accent-hover: #9b5fff;
  
  /* Typography */
  --font-family: 'Inter', 'Space Grotesk', -apple-system, sans-serif;
  --line-height-body: 1.6;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-medium: 300ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: var(--line-height-body);
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h1 {
  font-size: clamp(3rem, 8vw, 6rem);
}

h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

p {
  color: var(--text-secondary);
  max-width: 65ch;
}

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Navbar */
.navbar {
  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(--surface-border);
  padding: var(--spacing-sm) var(--spacing-md);
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

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

.navbar-nav a {
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all var(--transition-fast);
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--accent-hover);
  background: rgba(123, 47, 255, 0.1);
  box-shadow: 0 0 20px rgba(123, 47, 255, 0.3);
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
}

.navbar-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--accent-primary);
}

@media (max-width: 768px) {
  .navbar-toggle {
    display: flex;
  }
  
  .navbar-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--surface-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-medium);
  }
  
  .navbar-nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl) var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(123, 47, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(123, 47, 255, 0.1) 0%, transparent 40%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(123, 47, 255, 0.1);
  border: 1px solid var(--surface-border);
  border-radius: 100px;
  font-size: 0.875rem;
  color: var(--accent-hover);
  margin-bottom: var(--spacing-md);
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  margin-bottom: var(--spacing-sm);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-hover) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--text-primary);
  box-shadow: 0 4px 30px rgba(123, 47, 255, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 40px rgba(123, 47, 255, 0.5);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  border-color: var(--accent-primary);
  background: rgba(123, 47, 255, 0.1);
  box-shadow: 0 0 20px rgba(123, 47, 255, 0.2);
}

/* Features */
.features {
  padding: var(--spacing-xl) var(--spacing-md);
  background: var(--bg-secondary);
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-header h2 {
  margin-bottom: var(--spacing-xs);
}

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

.feature-card {
  background: var(--bg-primary);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: var(--spacing-md);
  transition: all var(--transition-medium);
}

.feature-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 0 30px rgba(123, 47, 255, 0.15);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(123, 47, 255, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  color: var(--accent-primary);
  font-size: 1.5rem;
}

.feature-card h3 {
  margin-bottom: var(--spacing-xs);
  font-size: 1.25rem;
}

/* Footer */
.footer {
  padding: var(--spacing-lg) var(--spacing-md);
  border-top: 1px solid var(--surface-border);
  text-align: center;
  color: var(--text-secondary);
}

.footer a {
  color: var(--accent-primary);
}

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