/* EcoInvestor Design System - Eco-Premium Theme */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&family=Lora:ital,wght@0,400..700;1,400..700&display=swap');

:root {
  /* Color Palette Tokens */
  --color-bg-primary: #FAF9F5;      /* Warm Organic Cream */
  --color-bg-secondary: #FFFFFF;    /* Pure White (Cards) */
  --color-bg-dark: #071E17;         /* Deep Forest Black */
  --color-brand-primary: #0A3226;   /* Deep Forest Green */
  --color-brand-secondary: #486E62; /* Sage Green */
  --color-brand-accent: #D99830;    /* Ochre Gold */
  --color-brand-accent-hover: #C58320;
  
  /* Text Colors */
  --color-text-main: #192521;       /* Dark Charcoal/Sage */
  --color-text-muted: #53645F;      /* Muted Sage */
  --color-text-light: #ECEFEF;      /* Creamy White */
  --color-text-light-muted: #9BB0AA;
  
  /* UI Elements */
  --color-border: #E2E8E6;          /* Soft grey border */
  --color-border-dark: #1E3730;
  --color-shadow-base: 11, 36, 30;  
  
  /* Status/Rating Colors */
  --color-rating-green: #278C6A;
  --color-rating-amber: #D98E30;
  --color-rating-red: #C44343;

  /* Typography Scale */
  --font-serif: 'Lora', Georgia, serif;
  --font-sans: 'DM Sans', system-ui, -apple-system, sans-serif;

  /* Spacing Scale */
  --space-xxs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.25rem;
  --space-xxl: 3.5rem;

  /* BorderRadius Tokens */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 6px rgba(var(--color-shadow-base), 0.04);
  --shadow-md: 0 6px 18px rgba(var(--color-shadow-base), 0.06);
  --shadow-lg: 0 16px 36px rgba(var(--color-shadow-base), 0.08);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--color-bg-primary);
  color: var(--color-text-main);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

input, button, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* --- Typography --- */
h1, h2, h3, h4, .serif-heading {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-brand-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  h3 { font-size: 1.3rem; }
}

.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-brand-accent); }
.font-serif { font-family: var(--font-serif); }

/* --- Layout Containers --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

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

@media (max-width: 992px) {
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .grid-cols-2, .grid-cols-3 { grid-template-columns: 1fr; }
}

/* --- Navigation Header --- */
.site-header {
  background-color: var(--color-bg-dark);
  color: var(--color-text-light);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border-dark);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-leaf {
  color: var(--color-brand-accent);
}

.site-nav {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav-link {
  font-weight: 500;
  padding: var(--space-xxs) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-brand-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-link:hover {
  color: var(--color-brand-accent);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.btn-primary {
  background-color: var(--color-brand-primary);
  color: var(--color-text-light);
  border: 1px solid var(--color-brand-primary);
}

.btn-primary:hover {
  background-color: #051a14;
  border-color: #051a14;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-brand-primary);
  border: 1px solid var(--color-brand-primary);
}

.btn-secondary:hover {
  background-color: var(--color-brand-primary);
  color: var(--color-text-light);
}

.btn-accent {
  background-color: var(--color-brand-accent);
  color: #000000;
}

.btn-accent:hover {
  background-color: var(--color-brand-accent-hover);
}

.btn-dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-light);
  border: 1px solid var(--color-border-dark);
}

.btn-dark:hover {
  background-color: #0b241e;
}

/* --- Card Components --- */
.card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

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

.card-img-wrapper {
  position: relative;
  aspect-ratio: 16 / 9;
  background-color: #e5edea;
  overflow: hidden;
}

.card-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.card:hover .card-img-wrapper img {
  transform: scale(1.03);
}

.card-content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  background-color: #ebf3f1;
  color: var(--color-brand-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
  width: fit-content;
}

.card-title {
  font-size: 1.35rem;
  margin-bottom: var(--space-xs);
  color: var(--color-brand-primary);
}

.card-summary {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  flex-grow: 1;
}

.card-footer {
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* --- Company Rating Scorecard Component --- */
.eco-rating-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.rating-AAA, .rating-AA, .rating-A { background-color: var(--color-rating-green); }
.rating-BBB, .rating-BB { background-color: var(--color-rating-amber); }
.rating-B, .rating-CCC, .rating-F { background-color: var(--color-rating-red); }

.company-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-sm);
}

.company-ticker {
  font-family: var(--font-sans);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  background-color: var(--color-bg-primary);
  padding: var(--space-xxs) var(--space-xs);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.scorecard-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xs);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px dashed var(--color-border);
}

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

.metric-label {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: var(--space-xxs);
}

.metric-value {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-brand-primary);
}

/* --- Hero Banner Section --- */
.hero-banner {
  background-color: var(--color-bg-dark);
  color: var(--color-text-light);
  padding: var(--space-xxl) 0;
  position: relative;
  overflow: hidden;
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle, rgba(92,131,116,0.1) 0%, rgba(7,30,23,0) 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 650px;
  position: relative;
  z-index: 10;
}

.hero-heading {
  font-size: 3.25rem;
  color: var(--color-bg-primary);
  margin-bottom: var(--space-md);
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--color-text-light-muted);
  margin-bottom: var(--space-lg);
}

/* --- Newsletter Signup Block --- */
.newsletter-inline {
  display: flex;
  gap: var(--space-xs);
  max-width: 500px;
}

.newsletter-inline input {
  flex-grow: 1;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-dark);
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--color-text-light);
  outline: none;
  transition: border-color var(--transition-fast);
}

.newsletter-inline input:focus {
  border-color: var(--color-brand-accent);
}

.newsletter-inline input::placeholder {
  color: var(--color-text-light-muted);
}

/* --- Content Sections --- */
.section-padding {
  padding: var(--space-xxl) 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-xl);
}

.section-title h2 {
  font-size: 2.2rem;
}

/* --- Lead Magnet / CTA Section --- */
.cta-box {
  background-color: var(--color-brand-primary);
  color: var(--color-text-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xxl);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -100px;
  left: -100px;
  width: 300px;
  height: 300px;
  background-color: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-full);
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 5;
}

.cta-title {
  color: var(--color-bg-primary);
  font-size: 2.25rem;
  margin-bottom: var(--space-sm);
}

.cta-desc {
  color: var(--color-text-light-muted);
  margin-bottom: var(--space-lg);
}

/* --- Post Layout & Content Typography --- */
.article-header {
  padding: var(--space-xxl) 0 var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.article-meta {
  display: flex;
  gap: var(--space-md);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-sm);
}

.article-content {
  font-size: 1.125rem;
  color: var(--color-text-main);
  line-height: 1.75;
  padding: var(--space-xl) 0;
}

.article-content p {
  margin-bottom: var(--space-lg);
}

.article-content h2 {
  margin: var(--space-xl) 0 var(--space-md);
  font-size: 1.85rem;
}

.article-content h3 {
  margin: var(--space-lg) 0 var(--space-sm);
  font-size: 1.4rem;
}

.article-content blockquote {
  border-left: 4px solid var(--color-brand-accent);
  padding-left: var(--space-md);
  margin: var(--space-lg) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

/* --- Company Review Detail Page --- */
.review-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.review-card-sidebar {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 100px;
}

.review-sidebar-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-border);
}

.review-metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border);
}

.review-metric-row:last-child {
  border-bottom: none;
}

@media (max-width: 768px) {
  .review-top-grid {
    grid-template-columns: 1fr;
  }
  .review-card-sidebar {
    position: static;
  }
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-light);
  padding: var(--space-xxl) 0 var(--space-lg);
  margin-top: auto;
  border-top: 1px solid var(--color-border-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

.footer-widget-title {
  color: var(--color-bg-primary);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.footer-desc {
  color: var(--color-text-light-muted);
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
  max-width: 350px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--color-text-light-muted);
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: var(--color-brand-accent);
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-light-muted);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.disclaimer-text {
  font-size: 0.78rem;
  color: var(--color-text-light-muted);
  line-height: 1.5;
  margin-top: var(--space-md);
}

/* --- Responsive Utility Classes --- */
.resource-featured-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-xl);
  align-items: center;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
}

/* --- Mobile Responsiveness Enhancements (max-width: 768px) --- */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .site-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
  }

  .newsletter-inline {
    flex-direction: column;
    width: 100%;
    max-width: 100%;
  }

  .newsletter-inline input {
    width: 100%;
  }

  .cta-box {
    padding: var(--space-xl) var(--space-md);
  }

  .resource-featured-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .form-grid-2 {
    grid-template-columns: 1fr;
  }
}