/* ==========================================================================
   BioLeela — Modern Biotech & Deep-Tech Stylesheet (bioleela.com)
   ========================================================================== */

:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --bg-dark: #0B0F19;
  --bg-card-dark: #111827;
  --bg-light: #F8FAFC;
  --bg-card-light: #FFFFFF;
  
  --text-dark-primary: #F8FAFC;
  --text-dark-secondary: #94A3B8;
  --text-light-primary: #0F172A;
  --text-light-secondary: #475569;
  
  --primary-emerald: #10B981;
  --primary-emerald-hover: #059669;
  --accent-cyan: #06B6D4;
  --accent-blue: #3B82F6;
  --accent-amber: #F59E0B;
  --accent-red: #EF4444;
  
  --border-dark: rgba(255, 255, 255, 0.08);
  --border-light: rgba(15, 23, 42, 0.08);
  --border-radius-sm: 8px;
  --border-radius-md: 14px;
  --border-radius-lg: 20px;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 35px rgba(16, 185, 129, 0.25);
  
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==================== TYPOGRAPHY & BADGES ==================== */
h1, h2, h3, h4 {
  color: var(--text-light-primary);
  font-weight: 700;
  line-height: 1.25;
}

h2 {
  font-size: 2.25rem;
  margin-bottom: 12px;
}

p.section-lead {
  font-size: 1.15rem;
  color: var(--text-light-secondary);
  max-width: 720px;
  margin: 0 auto 48px auto;
}

.text-center {
  text-align: center;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary-emerald);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 9999px;
  margin-bottom: 16px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-emerald), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background-color: var(--primary-emerald);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.btn-primary:hover {
  background-color: var(--primary-emerald-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* ==================== NAVBAR ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: #FFFFFF;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-symbol {
  color: var(--primary-emerald);
  font-size: 1.5rem;
}

.brand-dot {
  color: var(--primary-emerald);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--text-dark-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--primary-emerald);
}

.nav-cta {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #FFFFFF;
  margin: 5px 0;
  transition: var(--transition);
}

/* ==================== HERO SECTION ==================== */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 80px;
  background: radial-gradient(circle at top right, #1E293B 0%, var(--bg-dark) 65%);
  color: var(--text-dark-primary);
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(rgba(16, 185, 129, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.hero-title {
  color: #FFFFFF;
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-subtitle {
  color: var(--text-dark-secondary);
  font-size: 1.25rem;
  max-width: 800px;
  margin: 0 auto 36px auto;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.metric-card {
  background: rgba(17, 24, 39, 0.6);
  border: 1px solid var(--border-dark);
  border-radius: var(--border-radius-md);
  padding: 24px 16px;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}

.metric-card:hover {
  transform: translateY(-4px);
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.metric-val {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary-emerald);
  letter-spacing: -0.02em;
}

.metric-lbl {
  font-size: 0.8rem;
  color: var(--text-dark-secondary);
  margin-top: 6px;
  font-weight: 500;
}

/* ==================== GENERIC SECTIONS & GRIDS ==================== */
.section {
  padding: 96px 0;
}

.grid {
  display: grid;
  gap: 28px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: var(--bg-card-light);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ==================== PROBLEM CARDS ==================== */
.problem-card {
  position: relative;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.red-icon { background: rgba(239, 68, 68, 0.12); color: var(--accent-red); }
.amber-icon { background: rgba(245, 158, 11, 0.12); color: var(--accent-amber); }
.blue-icon { background: rgba(59, 130, 246, 0.12); color: var(--accent-blue); }

.problem-card h3 {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.problem-card p {
  color: var(--text-light-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.card-stat {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-light-primary);
}

/* ==================== COMPARISON TABLE ==================== */
.advantage-section {
  background: #F1F5F9;
}

.table-container {
  overflow-x: auto;
  background: #FFFFFF;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th, .comparison-table td {
  padding: 18px 24px;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border-light);
}

.comparison-table th {
  background: #F8FAFC;
  font-weight: 700;
  color: var(--text-light-primary);
}

.comparison-table td {
  color: var(--text-light-secondary);
}

.highlight-cell {
  background: rgba(16, 185, 129, 0.05);
  color: var(--primary-emerald) !important;
}

/* ==================== TECH CARDS ==================== */
.tech-card-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.tech-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-emerald);
}

.tech-card h3 {
  font-size: 1.35rem;
}

.tech-card p {
  color: var(--text-light-secondary);
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.tech-list {
  list-style: none;
}

.tech-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 0.9rem;
  color: var(--text-light-secondary);
}

.tech-list li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: var(--primary-emerald);
  font-weight: bold;
}

/* ==================== FLOW & RECIRCULATION ==================== */
.flow-section {
  background: var(--bg-dark);
  color: var(--text-dark-primary);
}

.flow-section h2, .flow-section h4, .flow-section h3 {
  color: #FFFFFF;
}

.flow-section p.section-lead {
  color: var(--text-dark-secondary);
}

.flow-diagram-wrapper {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.flow-step-card {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--border-radius-md);
  padding: 24px;
}

.step-num {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--primary-emerald);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.flow-step-card h4 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.flow-step-card p {
  font-size: 0.88rem;
  color: var(--text-dark-secondary);
  line-height: 1.5;
}

.recirc-highlight {
  display: flex;
  align-items: center;
  gap: 24px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--border-radius-md);
  padding: 32px;
}

.recirc-icon {
  font-size: 3rem;
}

.recirc-body h3 {
  font-size: 1.35rem;
  margin-bottom: 8px;
  color: #FFFFFF;
}

.recirc-body p {
  color: var(--text-dark-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ==================== ROADMAP CARDS ==================== */
.roadmap-card {
  display: flex;
  flex-direction: column;
}

.phase-tag {
  font-size: 0.75rem;
  font-weight: 800;
  color: #64748B;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.tam-badge {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  margin: 10px 0 16px 0;
  align-self: flex-start;
}

.featured-card {
  border-color: var(--primary-emerald);
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.15);
  position: relative;
}

.featured-card::before {
  content: "PRIMARY FOCUS";
  position: absolute;
  top: -12px;
  right: 20px;
  background: var(--primary-emerald);
  color: #FFFFFF;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

.roadmap-list {
  list-style: none;
  margin-top: 16px;
}

.roadmap-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 0.88rem;
  color: var(--text-light-secondary);
}

.roadmap-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--primary-emerald);
  font-size: 1.2rem;
  line-height: 1;
}

/* ==================== SPECS GRID ==================== */
.specs-section {
  background: #F8FAFC;
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.specs-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-md);
  padding: 28px;
}

.specs-card h4 {
  font-size: 1.2rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
  color: var(--primary-emerald);
}

.specs-list {
  list-style: none;
}

.specs-list li {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-light);
  font-size: 0.9rem;
}

.specs-list li:last-child {
  border-bottom: none;
}

.specs-list li span {
  color: var(--text-light-secondary);
}

.specs-list li strong {
  color: var(--text-light-primary);
}

/* ==================== CONTACT SECTION ==================== */
.contact-section {
  background: #FFFFFF;
}

.contact-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  padding: 56px;
  box-shadow: var(--shadow-sm);
}

.contact-text h2 {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.contact-text p {
  color: var(--text-light-secondary);
  font-size: 1rem;
  margin-bottom: 32px;
  line-height: 1.6;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.contact-icon {
  font-size: 1.25rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  background: #FFFFFF;
  padding: 32px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light-primary);
}

.form-group input, .form-group select, .form-group textarea {
  padding: 12px 14px;
  font-size: 0.95rem;
  border: 1px solid #CBD5E1;
  border-radius: var(--border-radius-sm);
  background: #FFFFFF;
  color: var(--text-light-primary);
  font-family: inherit;
  transition: var(--transition);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary-emerald);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

/* ==================== FOOTER ==================== */
.footer {
  background: var(--bg-dark);
  color: var(--text-dark-secondary);
  padding: 60px 0 40px 0;
  border-top: 1px solid var(--border-dark);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-brand {
  max-width: 480px;
}

.footer-brand .brand-text {
  color: #FFFFFF;
  font-size: 1.25rem;
  font-weight: 800;
}

.footer-copy {
  margin-top: 12px;
  font-size: 0.85rem;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-dark-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 992px) {
  .hero-title { font-size: 2.75rem; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .flow-diagram-wrapper { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-box { grid-template-columns: 1fr; padding: 32px; }
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.2rem; }
  .hero-subtitle { font-size: 1.05rem; }
  .grid-2, .grid-3, .specs-grid { grid-template-columns: 1fr; }
  .flow-diagram-wrapper { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: 1fr; }
  .nav-menu { display: none; }
  .mobile-toggle { display: block; }
  .recirc-highlight { flex-direction: column; text-align: center; }
  .hero-actions { flex-direction: column; }
}