/* Aenon - Seaweed Climate Technology Platform */
/* Brand Colors & Design System */

:root {
  /* Brand Colors */
  --deep-ocean: #004080;
  --seaweed-green: #006644;
  --tech-blue: #0077cc;
  --foam-white: #f8fafd;
  --ocean-gradient: linear-gradient(135deg, #004080 0%, #0077cc 100%);
  --seaweed-gradient: linear-gradient(135deg, #006644 0%, #00aa77 100%);
  
  /* Semantic Colors */
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* Spacing */
  --container-max: 1200px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: #ffffff;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Merriweather', Georgia, serif;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header Navigation */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: all 0.3s ease;
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

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

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--deep-ocean);
  font-family: 'Merriweather', serif;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2.5rem;
  align-items: center;
}

.nav-menu a {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--seaweed-green);
  transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-menu .dropdown {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  min-width: 250px;
  box-shadow: var(--shadow-lg);
  border-radius: 8px;
  padding: 0.5rem 0;
  margin-top: 0.5rem;
}

.dropdown:hover .dropdown-menu {
  display: block;
}

.dropdown-menu li {
  list-style: none;
}

.dropdown-menu a {
  display: block;
  padding: 0.75rem 1.5rem;
  color: var(--text-primary);
  transition: background 0.2s;
}

.dropdown-menu a:hover {
  background: var(--foam-white);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--deep-ocean);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--ocean-gradient);
  color: white;
  padding-top: 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,101.3C1248,85,1344,75,1392,69.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
  background-size: cover;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  animation: fadeInUp 1s ease;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero .tagline {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  opacity: 0.95;
  font-weight: 300;
}

.hero .subtitle {
  font-size: 1.1rem;
  margin-bottom: 3rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
  opacity: 0.9;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--seaweed-gradient);
  color: white;
  box-shadow: 0 4px 15px rgba(0, 102, 68, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 102, 68, 0.4);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background: white;
  color: var(--deep-ocean);
}

.btn-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Section Styles */
.section {
  padding: var(--spacing-xl) 0;
}

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

.section-title {
  color: var(--deep-ocean);
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Cards */
.card {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  background: var(--ocean-gradient);
  color: white;
}

.card-title {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--deep-ocean);
}

.card-description {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Glassmorphism Card */
.glass-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
}

/* Species Cards */
.species-card {
  background: white;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.species-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.species-image {
  width: 100%;
  height: 250px;
  background: var(--ocean-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: white;
  overflow: hidden;
}

.species-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.species-content {
  padding: 2rem;
}

.species-name {
  font-size: 1.5rem;
  color: var(--deep-ocean);
  margin-bottom: 0.5rem;
}

.species-latin {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.species-properties {
  margin-top: 1.5rem;
}

.property-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
  position: relative;
}

.property-item::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--seaweed-green);
  font-weight: bold;
  font-size: 1.2rem;
}

/* Diagram/Flow Chart */
.flow-diagram {
  background: var(--foam-white);
  border-radius: 16px;
  padding: 3rem;
  margin: 3rem 0;
}

.flow-steps {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.flow-step {
  flex: 1;
  min-width: 150px;
  text-align: center;
  padding: 1.5rem;
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

.flow-arrow {
  font-size: 2rem;
  color: var(--seaweed-green);
  font-weight: bold;
}

/* Timeline */
.timeline {
  position: relative;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--seaweed-green);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  gap: 2rem;
  margin-bottom: 3rem;
  position: relative;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-content {
  flex: 1;
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
}

.timeline-dot {
  width: 20px;
  height: 20px;
  background: var(--seaweed-green);
  border-radius: 50%;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid white;
  box-shadow: 0 0 0 4px var(--seaweed-green);
}

/* Footer */
.footer {
  background: var(--deep-ocean);
  color: white;
  padding: 3rem 0 1.5rem;
  margin-top: var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.3s;
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
}

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

.fade-in-up {
  animation: fadeInUp 0.8s ease;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.5rem; }
  
  .hero h1 { font-size: 2.5rem; }
  .hero .tagline { font-size: 1.1rem; }
  .hero .subtitle { font-size: 1rem; }
  
  .nav-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    gap: 1rem;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .dropdown-menu {
    position: static;
    box-shadow: none;
    padding-left: 1rem;
    margin-top: 0.5rem;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .timeline::before {
    left: 0;
  }
  
  .timeline-item,
  .timeline-item:nth-child(even) {
    flex-direction: column;
    padding-left: 2rem;
  }
  
  .timeline-dot {
    left: 0;
    transform: translateX(-50%);
  }
  
  .container {
    padding: 0 1rem;
  }
  
  .section {
    padding: 3rem 0;
  }
}

@media (max-width: 480px) {
  .btn-group {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
  
  .flow-steps {
    flex-direction: column;
  }
  
  .flow-arrow {
    transform: rotate(90deg);
  }
}