/* AmmoniaPropel - Marine Ammonia Fuel Website */
:root {
  --primary-navy: #0F4C81;
  --secondary-teal: #5DC9E2;
  --accent-light: #E8F4F8;
  --text-dark: #1a1a1a;
  --text-light: #666;
  --white: #ffffff;
  --gray-light: #f8f9fa;
  --gray-medium: #e9ecef;
  --success: #28a745;
  --warning: #ffc107;
}

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

body {
  font-family: 'Montserrat', 'Open Sans', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--primary-navy);
}

h1 {
  font-size: 3rem;
  font-weight: 700;
}

h2 {
  font-size: 2.5rem;
}

h3 {
  font-size: 2rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-light);
}

/* Header */
.header {
  background: linear-gradient(135deg, var(--primary-navy) 0%, #1a5a8a 100%);
  color: var(--white);
  padding: 1rem 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo::before {
  content: "⚓";
  font-size: 2rem;
}

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

.nav-menu a {
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-menu a:hover {
  color: var(--secondary-teal);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--secondary-teal);
  transition: width 0.3s ease;
}

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

/* Main Content */
.main-content {
  margin-top: 80px;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-navy) 0%, #1a5a8a 50%, var(--secondary-teal) 100%);
  color: var(--white);
  padding: 6rem 0;
  text-align: center;
  position: relative;
  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 0 100 100"><path d="M0,50 Q25,30 50,50 T100,50 L100,100 L0,100 Z" fill="rgba(255,255,255,0.05)"/></svg>');
  background-size: 200px 100px;
  animation: wave 20s linear infinite;
}

@keyframes wave {
  0% { transform: translateX(0); }
  100% { transform: translateX(-200px); }
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 1.5rem;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  color: var(--accent-light);
}

.key-stat {
  background: rgba(255,255,255,0.1);
  padding: 1.5rem;
  border-radius: 10px;
  margin: 2rem 0;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
}

.key-stat h3 {
  color: var(--secondary-teal);
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--secondary-teal);
  color: var(--white);
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn:hover {
  background: #4db8d4;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(93, 201, 226, 0.4);
}

.btn-primary {
  background: var(--primary-navy);
}

.btn-primary:hover {
  background: #0d3f6b;
}

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

/* Section */
.section {
  padding: 4rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.section-title p {
  font-size: 1.2rem;
  color: var(--text-light);
}

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

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Cards */
.card {
  background: var(--white);
  border-radius: 15px;
  padding: 2rem;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--gray-medium);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.card h3 {
  color: var(--primary-navy);
  margin-bottom: 1rem;
}

/* Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--white);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.comparison-table th,
.comparison-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-medium);
}

.comparison-table th {
  background: var(--primary-navy);
  color: var(--white);
  font-weight: 600;
}

.comparison-table tr:nth-child(even) {
  background: var(--gray-light);
}

.comparison-table tr:hover {
  background: var(--accent-light);
}

/* Partner Section */
.partner-section {
  background: var(--gray-light);
  padding: 3rem 0;
  text-align: center;
}

.partner-link {
  display: inline-block;
  padding: 1.5rem 2rem;
  background: var(--white);
  border-radius: 10px;
  text-decoration: none;
  color: var(--primary-navy);
  font-weight: 600;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.partner-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--primary-navy);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--gray-medium);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

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

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
.footer {
  background: var(--primary-navy);
  color: var(--white);
  padding: 3rem 0 1rem;
}

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

.footer-section h3 {
  color: var(--secondary-teal);
  margin-bottom: 1rem;
}

.footer-section a {
  color: var(--white);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: var(--secondary-teal);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.2);
  padding-top: 1rem;
  text-align: center;
}

.legal {
  font-size: 0.9rem;
  color: var(--accent-light);
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .container {
    padding: 0 1rem;
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

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

.text-teal {
  color: var(--secondary-teal);
}

.bg-light {
  background: var(--gray-light);
}

.mt-2 {
  margin-top: 2rem;
}

.mb-2 {
  margin-bottom: 2rem;
}

