/* ============================
   Noah Kontur - Personal Site
   Minimalist Dark Theme
   ============================ */

:root {
  /* Colors */
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-card: #18181b;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --border: #27272a;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.page {
  padding: var(--space-2xl) 0;
}

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

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-lg);
  color: var(--text-secondary);
}

h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

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

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

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text-primary);
  transition: opacity var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.8;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  padding-top: calc(var(--space-2xl) + 60px);
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-greeting {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: var(--space-xl);
}

.hero-links {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: white;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

/* Sections */
.section {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border);
}

.section-header {
  margin-bottom: var(--space-xl);
}

.section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

.card + .card {
  margin-top: var(--space-md);
}

.card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.card h3 {
  margin-bottom: var(--space-sm);
}

.card p {
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* Publication specific */
.publication-authors {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.publication-venue {
  font-style: italic;
  color: var(--text-secondary);
}

/* Poetry */
.poem {
  margin-bottom: var(--space-xl);
}

.poem-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

.poem-text {
  font-family: var(--font-sans);
  white-space: pre-line;
  line-height: 1.8;
  color: var(--text-secondary);
}

.poem-text em {
  font-style: italic;
}

/* Contact */
.contact-grid {
  display: grid;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all var(--transition-fast);
}

.contact-item:hover {
  border-color: var(--accent);
}

.contact-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: 8px;
  color: var(--accent);
}

.contact-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* Footer */
.footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Utility */
.mono {
  font-family: var(--font-mono);
}

/* Mobile Responsive */
@media (max-width: 640px) {
  html {
    font-size: 15px;
  }
  
  .container {
    padding: 0 var(--space-md);
  }
  
  .nav-inner {
    padding: var(--space-md);
  }
  
  .nav-links {
    gap: var(--space-md);
  }
  
  .hero h1 {
    font-size: 2.25rem;
  }
  
  .hero-tagline {
    font-size: 1.125rem;
  }
  
  .hero-links {
    flex-direction: column;
  }
  
  .btn {
    justify-content: center;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeIn 0.5s ease forwards;
}

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

/* Profile Picture */
.profile-pic {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: var(--space-lg);
  border: 3px solid var(--border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}