/* Reset and base styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #014e56;
  --primary-light: #01819b;
  --secondary: #f5a623;
  --bg: #f9fafb;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #64748b;
  --radius: 0.75rem;
  --shadow: 0 10px 15px rgba(0,0,0,0.05), 0 4px 6px rgba(0,0,0,0.05);
}

body {
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

/* Header and navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--surface);
  box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 64px;
}

.brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.brand span {
  font-weight: 700;
}

.nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  padding: 0.4rem 0;
  transition: color 0.2s ease;
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link.active {
  color: var(--primary);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--primary);
}

/* Hero section */
.hero {
  position: relative;
  background-image: linear-gradient(to bottom, rgba(1,78,86,0.7), rgba(1,78,86,0.9)), url('assets/hero-bg.png');
  background-size: cover;
  background-position: center;
  color: #fff;
  padding: 6rem 0 5rem;
  text-align: left;
}

.hero-content {
  position: relative;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.1;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero .highlight {
  color: var(--secondary);
}

.hero .tagline {
  font-size: 1.25rem;
  max-width: 640px;
  margin-bottom: 2rem;
  color: rgba(255,255,255,0.85);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  border-radius: var(--radius);
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--secondary);
  color: #ffffff;
}
.btn-primary:hover {
  background-color: #e29700;
}

.btn-secondary {
  background-color: rgba(255,255,255,0.15);
  color: #ffffff;
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-secondary:hover {
  background-color: rgba(255,255,255,0.25);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background-color: var(--primary);
  color: #ffffff;
}

/* Principles section */
.principles {
  padding: 4rem 0 4rem;
  background-color: var(--bg);
  text-align: center;
}

.principles h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--primary);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow);
  text-align: left;
  transition: transform 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
}
.icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.375rem;
  color: var(--primary);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Differences intro */
.differences-intro {
  padding: 4rem 0 5rem;
  background-color: var(--surface);
  text-align: center;
}

.differences-intro h2 {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 1rem;
}
.differences-intro p {
  color: var(--muted);
  margin-bottom: 2rem;
}

/* FAQ section */
.faq-section {
  background-color: var(--bg);
  padding: 4rem 0;
}
.faq-section h2 {
  font-size: 1.875rem;
  color: var(--primary);
  text-align: center;
  margin-bottom: 1.5rem;
}
.faq-list {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.faq-list details {
  border: 1px solid #e5e7eb;
  border-radius: var(--radius);
  background-color: var(--surface);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
}
.faq-list summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--primary);
  margin-bottom: 0.5rem;
}
.faq-list summary::-webkit-details-marker {
  display: none;
}
.faq-list p {
  color: var(--muted);
  margin: 0.5rem 0 0;
}

/* Contact section */
.contact-section {
  background-color: var(--surface);
  padding: 4rem 0;
}
.contact-section h2 {
  font-size: 1.875rem;
  color: var(--primary);
  text-align: center;
  margin-bottom: 1rem;
}
.contact-section p {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--muted);
}
.contact-form {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  display: grid;
  gap: 1rem;
}
.contact-form .form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.contact-form label {
  display: flex;
  flex-direction: column;
  font-weight: 600;
  color: var(--primary);
}
.contact-form input,
.contact-form textarea {
  border: 1px solid #cbd5e1;
  border-radius: var(--radius);
  padding: 0.75rem 0.9rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
}
.contact-form textarea {
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--primary-light);
  border-color: var(--primary-light);
}

/* Page hero for secondary pages */
.page-hero {
  background: linear-gradient(to bottom, var(--primary), var(--primary-light));
  color: #ffffff;
  padding: 4rem 0;
  text-align: left;
}
.page-hero h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}
.page-hero .tagline {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.85);
}

.page-content {
  padding: 4rem 0 5rem;
  background-color: var(--bg);
}
.page-content h2 {
  font-size: 1.75rem;
  color: var(--primary);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}
.page-content p {
  margin: 0 0 1.25rem;
  color: var(--muted);
  max-width: 800px;
}
.checklist {
  list-style: none;
  padding-left: 0;
  margin: 0 0 1.5rem;
}
.checklist li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.6rem;
  color: var(--muted);
}
.checklist li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: var(--secondary);
  font-weight: 700;
}

.note {
  margin: 2rem 0;
  padding: 1.25rem;
  border-left: 4px solid var(--secondary);
  background-color: #fff7ed;
  color: var(--text);
  border-radius: var(--radius);
}

.pager {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Differences page */
.differences-content .diff-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-bottom: 2rem;
}
.differences-content .diff-card {
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.differences-content .diff-card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
  font-size: 1.375rem;
  color: var(--primary);
}
.differences-content .diff-card p {
  margin: 0.4rem 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.note strong {
  color: var(--primary);
}

.site-footer {
  background-color: var(--surface);
  border-top: 1px solid #e5e7eb;
  padding: 2rem 0;
  text-align: center;
  color: var(--muted);
}

/* Responsive navigation */
@media (max-width: 900px) {
  .nav {
    position: absolute;
    top: 64px;
    right: 1rem;
    background-color: var(--surface);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    display: none;
  }
  .nav.open {
    display: flex;
  }
  .nav-toggle {
    display: inline-block;
  }
}