/* Lab Ledger - Liquid Glass Design System */

:root {
  /* Color Palette */
  --glass-white: rgba(255, 255, 255, 0.1);
  --glass-white-strong: rgba(255, 255, 255, 0.2);
  --glass-border: rgba(255, 255, 255, 0.18);
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --shadow-color: rgba(0, 0, 0, 0.1);
  
  /* Spacing */
  --radius-xl: 1rem;
  --radius-full: 9999px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Glassmorphism Base */
.glass {
  background: var(--glass-white);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px var(--shadow-color);
}

.glass-strong {
  background: var(--glass-white-strong);
  backdrop-filter: blur(30px) saturate(200%);
  -webkit-backdrop-filter: blur(30px) saturate(200%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.5rem 2rem;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-xl);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: var(--glass-white);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.nav-links a.active {
  color: var(--text-primary);
  background: var(--glass-white-strong);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent);
  border-radius: 50%;
  animation: float 20s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.12), transparent);
  border-radius: 50%;
  animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.1); }
}

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

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #ffffff, var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero .subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.2s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Buttons */
.btn {
  padding: 1rem 2.5rem;
  border-radius: var(--radius-xl);
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 40px rgba(59, 130, 246, 0.4), 0 0 30px rgba(59, 130, 246, 0.2);
}

.btn-secondary {
  background: var(--glass-white-strong);
  color: var(--text-primary);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: var(--glass-white);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--shadow-color);
}

.cta-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.4s both;
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 6rem 2rem;
}

/* Section */
.section {
  padding: 6rem 2rem;
  position: relative;
}

.section-title {
  font-size: 3rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.25rem;
  margin-bottom: 4rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Feature Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.feature-card {
  padding: 2.5rem;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
  opacity: 0;
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius-xl);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(59, 130, 246, 0.2), 0 0 40px rgba(59, 130, 246, 0.1);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

/* Footer */
footer {
  padding: 4rem 2rem 2rem;
  text-align: center;
  border-top: 1px solid var(--glass-border);
  margin-top: 6rem;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.footer-bottom {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero .subtitle {
    font-size: 1.2rem;
  }
  
  .nav-links {
    gap: 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* Content Pages */
.content-page {
  min-height: 100vh;
  padding-top: 8rem;
}

.content-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.page-header {
  text-align: center;
  margin-bottom: 4rem;
}

.page-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff, var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
}

.content-card {
  padding: 3rem;
  margin-bottom: 2rem;
}

.content-card h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.content-card h3 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--primary-light);
}

.content-card p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.content-card ul, .content-card ol {
  color: var(--text-secondary);
  margin-left: 2rem;
  margin-bottom: 1.5rem;
}

.content-card li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

/* Form Styles */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  background: var(--glass-white);
  backdrop-filter: blur(20px);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1), 0 0 20px rgba(59, 130, 246, 0.2);
  background: var(--glass-white-strong);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}