/* DecisionDNA - Clinical Data Science Aesthetic */

:root {
  /* Color System - Pure monochrome (black, white, grey only) */
  --color-deep-black: #000000;
  --color-charcoal: #0A0A0A;
  --color-slate: #1A1A1A;
  --color-gray: #E8E8E8;
  --color-light-gray: #CCCCCC;
  --color-off-white: #E8E8E8;
  --color-white: #FFFFFF;
  
  /* Accent - Pure white for emphasis */
  --color-accent: #FFFFFF;
  --color-accent-dim: #CCCCCC;
  --color-accent-glow: rgba(255, 255, 255, 0.15);
  
  /* Alert colors - Greyscale */
  --color-alert-high: #FFFFFF;
  --color-alert-medium: #CCCCCC;
  --color-alert-low: #888888;
  
  /* Typography */
  --font-display: 'Alata', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-data: 'Roboto Mono', 'Courier New', monospace;
  --font-hero: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Spacing System */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-xxl: 10rem;
  
  /* Layout */
  --content-width: 1200px;
  --content-narrow: 800px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--color-deep-black);
  color: var(--color-off-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography System */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-white);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  margin-bottom: var(--space-md);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: var(--space-sm);
}

h4 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-sm);
  font-size: 1.125rem;
  color: var(--color-light-gray);
}

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

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

/* Layout Components */
.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: var(--content-narrow);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 14, 20, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1000;
  transition: background var(--transition-base);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  max-width: var(--content-width);
  margin: 0 auto;
  position: relative;
}

.nav-logo-container {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-md);
  z-index: 1001;
}

.nav-logo-img {
  height: 50px;
  width: auto;
  display: block;
}

@media (max-width: 768px) {
  .nav-logo-img {
    height: 35px;
  }
  .nav-logo-container {
    right: var(--space-sm);
  }
}

.nav-logo {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.25rem;
  color: var(--color-white);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo-text {
  display: inline;
}

.nav-logo-decision {
  font-weight: 400; /* Regular */
}

.nav-logo-dna {
  font-weight: 300; /* Light */
}

.nav-logo-icon {
  width: 1rem;
  height: 1rem;
  display: block;
  /* SVG has white circles - no filter needed */
  opacity: 1;
}


.nav-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-light-gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}

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

.nav-cta {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.nav-cta:hover {
  background: var(--color-accent);
  color: var(--color-deep-black);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: var(--space-xxl) 0 var(--space-xl) 0;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.hero h1 {
  font-family: var(--font-hero);
  font-size: clamp(2rem, 4vw, 3rem);
  text-align: center;
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.4s forwards;
}

.hero-label {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.2s forwards;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-light-gray);
  margin-bottom: var(--space-lg);
  max-width: 700px;
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.6s forwards;
}

.hero-ctas {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.8s forwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Background Effect */
.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  opacity: 0.3;
}

.metabolic-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridPulse 8s ease-in-out infinite;
}

@keyframes gridPulse {
  0%, 100% {
    opacity: 0.3;
  }
  50% {
    opacity: 0.15;
  }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  border-radius: 2px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-deep-black);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.btn-primary:hover {
  background: var(--color-white);
  color: var(--color-deep-black);
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background: var(--color-white);
  color: var(--color-deep-black);
  transform: translateY(-2px);
}

/* Section Layouts */
section {
  padding: var(--space-xl) 0;
  position: relative;
}

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

.section-label {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.section-divider {
  width: 60px;
  height: 2px;
  background: var(--color-accent);
  margin: var(--space-md) auto;
}

/* Product Cards */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.product-card {
  background: var(--color-charcoal);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.product-label {
  font-family: var(--font-data);
  font-size: 0.7rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.product-card h3 {
  margin-bottom: var(--space-sm);
  font-size: 1.5rem;
}

.product-card p {
  color: var(--color-gray);
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

.product-features {
  list-style: none;
  margin: var(--space-sm) 0;
}

.product-features li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--color-light-gray);
  font-size: 0.95rem;
}

.product-features li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-sm);
}

.product-link::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.product-link:hover::after {
  transform: translateX(4px);
}

/* Data Visualization Components */
.metric-display {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 3rem;
  color: var(--color-accent);
  font-weight: 600;
  line-height: 1;
}

.metric-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: var(--space-xs);
}

/* Dimension Cards */
.dimensions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

@media (max-width: 768px) {
  .dimensions-grid {
    grid-template-columns: 1fr;
  }
}

.dimension-card {
  background: var(--color-charcoal);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-md);
  transition: all var(--transition-base);
}

.dimension-card:hover {
  background: var(--color-slate);
  transform: translateX(4px);
}

.dimension-card h4 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}

/* Research Paper Cards */
.research-grid {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.research-paper {
  background: var(--color-charcoal);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-md);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  transition: all var(--transition-base);
}

.research-paper:hover {
  border-color: var(--color-accent);
}

.research-status {
  width: 4px;
  background: var(--color-accent);
}

.research-content h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
}

.research-meta {
  font-family: var(--font-data);
  font-size: 0.875rem;
  color: var(--color-gray);
  margin-bottom: var(--space-sm);
}

/* Formula Display */
.formula {
  background: var(--color-charcoal);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-md);
  font-family: var(--font-data);
  font-size: 1.125rem;
  color: var(--color-white);
  margin: var(--space-md) 0;
  overflow-x: auto;
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: var(--space-lg) auto;
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-light-gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 1rem;
  background: var(--color-charcoal);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  border-radius: 0;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-textarea {
  resize: vertical;
  min-height: 150px;
}

/* Footer */
.footer {
  background: var(--color-charcoal);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-lg) 0 var(--space-md) 0;
  margin-top: var(--space-xxl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-section h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--color-gray);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: var(--color-gray);
  font-size: 0.875rem;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-metabolic {
  color: var(--color-accent);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.mt-lg {
  margin-top: var(--space-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-charcoal);
    padding: var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .hero {
    min-height: 80vh;
    padding: var(--space-xl) 0;
  }
  
  .hero-ctas {
    flex-direction: column;
  }
  
  .product-grid,
  .dimensions-grid {
    grid-template-columns: 1fr;
  }
  
  .research-paper {
    grid-template-columns: 1fr;
  }
  
  .research-status {
    width: 100%;
    height: 4px;
  }
}

/* Loading State */
.loading {
  opacity: 0;
  animation: fadeIn 0.3s ease-out forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

/* Print Styles */
@media print {
  .nav,
  .footer,
  .hero-bg {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}