:root {
  --bg-petrol: #0d2a33;
  --bg-petrol-dark: #081d24;
  --bg-surface: #133945;
  --bg-surface-hover: #194a59;
  --accent-coral: #ff6f59;
  --accent-coral-glow: rgba(255, 111, 89, 0.25);
  --text-pale: #e0f2f1;
  --text-muted: #9dc3c1;
  --border-coral-slate: rgba(255, 111, 89, 0.35);
  --border-subtle: rgba(224, 242, 241, 0.15);
  --font-serif: Georgia, Cambria, "Times New Roman", Times, serif;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-petrol);
  color: var(--text-pale);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-wrap: anywhere;
  hyphens: auto;
  -webkit-font-smoothing: antialiased;
}

/* Header & Nav */
header.site-header {
  position: static;
  width: 100%;
  background: var(--bg-petrol-dark);
  border-bottom: 2px solid var(--accent-coral);
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-mark {
  text-align: left;
  text-decoration: none;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--accent-coral);
  letter-spacing: -0.02em;
}

.brand-mark span {
  color: var(--text-pale);
  font-size: 0.95rem;
  display: block;
  font-family: var(--font-sans);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

nav.main-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

nav.main-nav a {
  color: var(--text-pale);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.4rem 0.6rem;
  transition: color 0.2s ease;
  border-bottom: 2px solid transparent;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--accent-coral);
  border-bottom: 2px solid var(--accent-coral);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  color: var(--accent-coral);
  border: 1px solid var(--accent-coral);
  font-size: 1.4rem;
  line-height: 1;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  border-radius: 0;
}

/* Hero Section */
.hero-streamlined {
  padding: 3.5rem 1.5rem 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-streamlined h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  line-height: 1.15;
  color: var(--text-pale);
  margin-bottom: 1.25rem;
  max-width: 22ch;
  font-weight: 700;
}

.hero-lead {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 68ch;
  margin-bottom: 2rem;
}

/* Accent Band */
.coral-stripe {
  background: var(--accent-coral);
  color: var(--bg-petrol-dark);
  padding: 0.85rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Layout Grids */
.section-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
}

.two-col-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.section-head {
  max-width: 68ch;
  margin-bottom: 1.5rem;
}

.section-head h2 {
  font-family: var(--font-serif);
  font-size: 1.9rem;
  color: var(--accent-coral);
  margin-bottom: 0.5rem;
}

.section-head p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* 0px Square Cards */
.research-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-coral-slate);
  border-radius: 0;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.research-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--text-pale);
  margin-bottom: 0.75rem;
}

.research-card p {
  color: var(--text-muted);
  font-size: 0.98rem;
  margin-bottom: 1.25rem;
}

.research-card .meta-tag {
  display: inline-block;
  background: rgba(255, 111, 89, 0.15);
  color: var(--accent-coral);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.25rem 0.5rem;
  margin-bottom: 1rem;
  border-left: 2px solid var(--accent-coral);
}

.visual-frame {
  margin: 1.5rem 0;
  border: 1px solid var(--border-coral-slate);
  background: var(--bg-petrol-dark);
}

.visual-frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 280px;
}

/* Button Component */
.btn-coral-pill {
  display: inline-block;
  background-color: var(--accent-coral);
  color: var(--bg-petrol-dark);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.75rem 1.8rem;
  border-radius: 9999px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  text-align: center;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.btn-coral-pill:hover {
  opacity: 0.92;
  transform: translateY(-2px);
}

/* Interactive Calculator */
.calc-container {
  background: var(--bg-petrol-dark);
  border: 1px solid var(--border-coral-slate);
  padding: 2.25rem;
  margin-top: 2rem;
}

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

.calc-field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-pale);
  font-size: 0.9rem;
}

.calc-field select,
.calc-field input {
  width: 100%;
  padding: 0.7rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-coral-slate);
  color: var(--text-pale);
  font-size: 1rem;
  border-radius: 0;
}

.calc-result {
  background: var(--bg-surface);
  border-left: 4px solid var(--accent-coral);
  padding: 1.25rem;
  margin-top: 1.5rem;
}

.calc-result h4 {
  font-size: 1.1rem;
  color: var(--accent-coral);
  margin-bottom: 0.25rem;
}

/* Reading Long-Form */
.reading-body {
  max-width: 72ch;
  margin: 0 auto;
}

.reading-body p {
  margin-bottom: 1.4rem;
  font-size: 1.05rem;
  color: var(--text-muted);
}

.reading-body h2 {
  font-family: var(--font-serif);
  color: var(--text-pale);
  font-size: 1.8rem;
  margin: 2.5rem 0 1rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.5rem;
}

.reading-body ul, .reading-body ol {
  margin: 0 0 1.5rem 1.5rem;
  color: var(--text-muted);
}

.reading-body li {
  margin-bottom: 0.5rem;
}

/* Data Table Container */
.table-responsive {
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--border-coral-slate);
}

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

table.eco-table th,
table.eco-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

table.eco-table th {
  background: var(--bg-surface-hover);
  color: var(--accent-coral);
  font-size: 0.85rem;
  text-transform: uppercase;
}

/* Contact Toolkit Form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 68ch;
  margin: 2rem auto;
}

.contact-grid input,
.contact-grid textarea {
  width: 100%;
  padding: 0.85rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-coral-slate);
  color: var(--text-pale);
  font-family: inherit;
  font-size: 1rem;
  border-radius: 0;
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

/* FAQ Accordion */
.faq-item {
  border: 1px solid var(--border-coral-slate);
  background: var(--bg-surface);
  margin-bottom: 1rem;
  padding: 1.25rem;
}

.faq-item h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--accent-coral);
  margin-bottom: 0.5rem;
}

.faq-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Site Footer */
footer.site-footer {
  background-color: var(--bg-petrol-dark);
  border-top: 2px solid var(--accent-coral);
  padding: 3rem 1.5rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
}

.footer-brand {
  text-align: left;
}

.footer-brand h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--accent-coral);
  margin-bottom: 0.5rem;
}

.footer-brand a {
  color: var(--text-pale);
  text-decoration: underline;
}

.footer-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-nav h4 {
  font-size: 0.95rem;
  text-transform: uppercase;
  color: var(--text-pale);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

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

.footer-nav ul li {
  margin-bottom: 0.4rem;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-nav a:hover {
  color: var(--accent-coral);
}

.legal-notice {
  grid-column: 1 / -1;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  nav.main-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 75px;
    left: 0;
    width: 100%;
    background: var(--bg-petrol-dark);
    padding: 1.5rem;
    border-bottom: 2px solid var(--accent-coral);
  }

  nav.main-nav.menu-open {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}