/* ================================================================
   Sphere For Good — Main Stylesheet
   Static site / S3 hosted — no build step required.

   CloudFront: serve with Cache-Control: max-age=31536000, immutable
   ================================================================ */

/* ----------------------------------------------------------------
   1. DESIGN TOKENS (CSS Custom Properties)
   ---------------------------------------------------------------- */
:root {
  /* Brand colours */
  --color-rich-blue:    #2B3990;
  --color-bright-green: #2BB673;
  --color-rich-green:   #006838;
  --color-bright-blue:  #6DCEF0;
  --color-gold:         #FFD966;
  --color-black:        #000000;
  --color-white:        #FFFFFF;

  /* Semantic aliases */
  --color-primary:      var(--color-rich-blue);
  --color-accent:       var(--color-bright-green);
  --color-support:      var(--color-rich-green);
  --color-highlight:    var(--color-gold);
  --color-bg:           var(--color-white);
  --color-bg-alt:       #F5F7FA;
  --color-bg-dark:      var(--color-rich-blue);
  --color-text:         #1A1A2E;
  --color-text-muted:   #4A5568;
  --color-border:       #E2E8F0;

  /* Footer */
  --color-footer-bg:    var(--color-rich-blue);
  --color-footer-text:  rgba(255,255,255,0.85);
  --color-footer-link:  rgba(255,255,255,0.95);

  /* Typography — Avenir system stack (no CDN) */
  --font-sans: Avenir, "Avenir Next", "Avenir Next LT Pro", system-ui,
               -apple-system, "Segoe UI", Roboto, Arial, sans-serif;

  /* Font weights mapped to Avenir Next LT Pro */
  --fw-regular: 400;
  --fw-demi:    600;  /* Avenir Next LT Pro Demi */
  --fw-bold:    700;

  /* Spacing scale */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --container-max:  1200px;
  --container-pad:  1.25rem;
  --radius-sm:      4px;
  --radius-md:      8px;
  --radius-lg:      16px;
  --radius-pill:    999px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* Shadows — kept very subtle per brand guidance */
  --shadow-sm:  0 1px 3px rgba(43,57,144,0.08);
  --shadow-md:  0 4px 16px rgba(43,57,144,0.10);
  --shadow-lg:  0 8px 32px rgba(43,57,144,0.12);
}

/* ----------------------------------------------------------------
   2. FONT FACE — include if font files are placed in /assets/fonts/
      Uncomment when font files are available.
   ---------------------------------------------------------------- */
/*
@font-face {
  font-family: "Avenir Next LT Pro";
  src: url("fonts/AvenirNextLTPro-Regular.woff2") format("woff2"),
       url("fonts/AvenirNextLTPro-Regular.woff")  format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Avenir Next LT Pro";
  src: url("fonts/AvenirNextLTPro-Demi.woff2") format("woff2"),
       url("fonts/AvenirNextLTPro-Demi.woff")  format("woff");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Avenir Next LT Pro";
  src: url("fonts/AvenirNextLTPro-Bold.woff2") format("woff2"),
       url("fonts/AvenirNextLTPro-Bold.woff")  format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
*/

/* ----------------------------------------------------------------
   3. RESET & BASE
   ---------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--color-rich-green);
}

ul, ol {
  list-style: none;
}

/* ----------------------------------------------------------------
   4. ACCESSIBILITY
   ---------------------------------------------------------------- */

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: var(--fw-demi);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

/* Visible focus ring — meets WCAG 2.4.7 */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Screen-reader only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ----------------------------------------------------------------
   5. LAYOUT UTILITIES
   ---------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

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

.section {
  padding-block: var(--space-4xl);
}

.section-alt {
  background-color: var(--color-bg-alt);
}

/* Intro section: soft blue/green gradient from style guide (used on solutions index) */
.section-intro {
  background: linear-gradient(
    160deg,
    rgba(43, 57, 144, 0.12) 0%,
    rgba(30, 45, 122, 0.08) 25%,
    rgba(0, 104, 56, 0.1) 55%,
    rgba(0, 104, 56, 0.14) 80%,
    rgba(43, 182, 115, 0.12) 100%
  ),
  linear-gradient(180deg, #f8fafc 0%, #f0f7f4 100%);
  color: var(--color-text);
}

/* Page-specific light blue/green intro backgrounds (non-homepage) */
.section-intro--solutions {
  /* default above */
}
.section-intro--about {
  background: linear-gradient(160deg, rgba(43, 57, 144, 0.14) 0%, rgba(109, 206, 240, 0.1) 100%),
    linear-gradient(180deg, #f4f7fc 0%, #eef6fb 100%);
}
.section-intro--contact {
  background: linear-gradient(160deg, rgba(0, 104, 56, 0.1) 0%, rgba(43, 182, 115, 0.12) 100%),
    linear-gradient(180deg, #f0f7f4 0%, #e8f5ef 100%);
}
.section-intro--news {
  background: linear-gradient(160deg, rgba(43, 57, 144, 0.1) 0%, rgba(0, 104, 56, 0.08) 100%),
    linear-gradient(180deg, #f2f6fa 0%, #eef5f2 100%);
}
.section-intro--terms {
  background: linear-gradient(160deg, rgba(0, 104, 56, 0.08) 0%, rgba(43, 57, 144, 0.08) 100%),
    linear-gradient(180deg, #eef5f2 0%, #f2f5fa 100%);
}
.section-intro--privacy {
  background: linear-gradient(160deg, rgba(43, 57, 144, 0.12) 0%, rgba(109, 206, 240, 0.08) 100%),
    linear-gradient(180deg, #f6f9fc 0%, #f0f8fb 100%);
}
.section-intro--copyright {
  background: linear-gradient(160deg, rgba(43, 182, 115, 0.1) 0%, rgba(0, 104, 56, 0.08) 100%),
    linear-gradient(180deg, #f0f9f4 0%, #eaf5ef 100%);
}

.section-intro--faq {
  background: linear-gradient(160deg, rgba(43, 57, 144, 0.08) 0%, rgba(0, 104, 56, 0.1) 100%),
    linear-gradient(180deg, #f2f6fa 0%, #eef5f2 100%);
}
.section-intro--banks {
  background: linear-gradient(160deg, rgba(43, 57, 144, 0.14) 0%, rgba(109, 206, 240, 0.1) 100%),
    linear-gradient(180deg, #f2f5fc 0%, #eef6fb 100%);
}
.section-intro--merchants {
  background: linear-gradient(160deg, rgba(0, 104, 56, 0.12) 0%, rgba(43, 182, 115, 0.12) 100%),
    linear-gradient(180deg, #eef6f2 0%, #e8f5ee 100%);
}
.section-intro--payment-gateways {
  background: linear-gradient(160deg, rgba(43, 57, 144, 0.1) 0%, rgba(0, 104, 56, 0.1) 100%),
    linear-gradient(180deg, #f0f4fa 0%, #eef5f2 100%);
}
.section-intro--marketplace {
  background: linear-gradient(160deg, rgba(43, 182, 115, 0.12) 0%, rgba(0, 104, 56, 0.1) 100%),
    linear-gradient(180deg, #eef7f2 0%, #e6f3ec 100%);
}
.section-intro--emissions {
  background: linear-gradient(160deg, rgba(0, 104, 56, 0.1) 0%, rgba(109, 206, 240, 0.1) 100%),
    linear-gradient(180deg, #eef5f2 0%, #eef8fb 100%);
}
.section-intro--investors {
  background: linear-gradient(160deg, rgba(43, 57, 144, 0.12) 0%, rgba(30, 45, 122, 0.06) 100%),
    linear-gradient(180deg, #f4f6fc 0%, #f0f4fa 100%);
}

.section-intro .section-heading,
.section-intro-heading {
  color: var(--color-primary);
}

.section-intro p {
  color: var(--color-text-muted);
}

/* Cards in intro section: ensure readable contrast (override section text colour) */
.section-intro .card .card-title {
  color: var(--color-primary);
}

.section-intro .card .card-body {
  color: var(--color-text-muted);
}

.section-intro .card a {
  color: inherit;
}

.section-intro-heading {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: var(--fw-demi);
  line-height: 1.25;
  margin-bottom: var(--space-lg);
}

.section-dark {
  background: linear-gradient(160deg, rgba(43, 57, 144, 0.08) 0%, rgba(109, 206, 240, 0.06) 100%),
    linear-gradient(180deg, #f4f6fc 0%, #eef4fa 100%);
  color: var(--color-text);
}

.section-dark .section-heading {
  color: var(--color-primary);
}

.section-cta {
  background: linear-gradient(160deg, rgba(0, 104, 56, 0.08) 0%, rgba(43, 182, 115, 0.1) 100%),
    linear-gradient(180deg, #eef6f2 0%, #e8f5ee 100%);
  color: var(--color-text);
}

.section-cta .section-heading {
  color: var(--color-primary);
}

/* Two-column grid */
.section-grid.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.section-grid.two-col.reverse {
  direction: rtl;
}

.section-grid.two-col.reverse > * {
  direction: ltr;
}

@media (max-width: 768px) {
  .section-grid.two-col,
  .section-grid.two-col.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }
}

/* Three-column cards */
.cards-grid.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

@media (max-width: 900px) {
  .cards-grid.three-col {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 601px) and (max-width: 900px) {
  .cards-grid.three-col {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ----------------------------------------------------------------
   6. TYPOGRAPHY
   ---------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--fw-demi);
  line-height: 1.25;
  color: var(--color-primary);
}

.section-heading {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  margin-bottom: var(--space-xl);
  color: var(--color-primary);
}

.subheading {
  font-size: 1.05rem;
  font-weight: var(--fw-demi);
  color: var(--color-primary);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
}

.section-dark p,
.section-cta p {
  color: var(--color-text-muted);
}

.closing-line {
  font-style: italic;
  color: var(--color-text-muted);
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-md);
  margin-top: var(--space-xl);
}

/* Content-page design elements (break up document-style layout) */
.page-lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 42rem;
  margin-top: calc(-1 * var(--space-md));
  margin-bottom: var(--space-2xl);
  line-height: 1.6;
}

.page-content .subheading {
  font-size: 1.15rem;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-lg);
}

.page-content .subheading:first-of-type {
  margin-top: 0;
}

.content-panel {
  background: rgba(255,255,255,0.7);
  border: 1px solid rgba(43, 57, 144, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  box-shadow: var(--shadow-sm);
}

.content-panel .subheading {
  margin-top: 0;
}

.stat-callouts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-2xl) 0;
}

.stat-callout {
  background: linear-gradient(135deg, rgba(43, 182, 115, 0.06) 0%, rgba(0, 104, 56, 0.04) 100%);
  border: 1px solid rgba(0, 104, 56, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.stat-callout-value {
  font-size: 2.25rem;
  font-weight: var(--fw-bold);
  color: var(--color-primary);
  line-height: 1.2;
  display: block;
  margin-bottom: var(--space-xs);
}

.stat-callout-label {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
}

.pull-quote {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-text);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-2xl) 0;
  background: linear-gradient(90deg, rgba(43, 182, 115, 0.08) 0%, transparent 100%);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.pull-quote p {
  margin: 0;
}

.pull-quote-cite {
  font-size: 0.875rem;
  font-style: normal;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

.benefit-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-2xl) 0;
  list-style: none;
  padding: 0;
}

.benefit-cards li,
.benefit-card {
  background: rgba(255,255,255,0.8);
  border: 1px solid rgba(43, 57, 144, 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.benefit-cards li:hover,
.benefit-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.benefit-card-title {
  font-size: 1rem;
  font-weight: var(--fw-demi);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.benefit-card p {
  font-size: 0.9375rem;
  margin: 0;
  color: var(--color-text-muted);
}

.pillar-list {
  display: grid;
  gap: var(--space-lg);
  margin: var(--space-2xl) 0;
}

.pillar-item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  background: rgba(255,255,255,0.6);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-xl);
  border: 1px solid rgba(43, 57, 144, 0.08);
}

.pillar-item-strong {
  font-size: 1rem;
  font-weight: var(--fw-demi);
  color: var(--color-primary);
  flex-shrink: 0;
  min-width: 6rem;
}

.pillar-item p {
  margin: 0;
  font-size: 0.9375rem;
}

.contact-details-card {
  background: rgba(255,255,255,0.7);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid rgba(43, 57, 144, 0.1);
  margin-bottom: var(--space-2xl);
}

/* Contact page: tighter spacing */
.section-intro--contact .section-grid.two-col {
  gap: var(--space-xl);
  align-items: start;
}
.section-intro--contact .page-lead {
  margin-bottom: var(--space-xl);
}
.section-intro--contact .contact-details-card {
  margin-bottom: 0;
  padding: var(--space-lg) var(--space-xl);
}
.section-intro--contact .content-panel {
  margin-top: 0;
  margin-bottom: 0;
  padding: var(--space-lg) var(--space-xl);
}
.section-intro--contact .content-panel .subheading {
  margin-bottom: var(--space-md);
}

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
@media (max-width: 480px) {
  .contact-form .form-row {
    grid-template-columns: 1fr;
  }
}
.contact-form .form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.contact-form label {
  font-size: 0.875rem;
  font-weight: var(--fw-demi);
  color: var(--color-primary);
}
.contact-form label span[aria-hidden="true"] {
  color: var(--color-accent);
}
.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form select {
  font: inherit;
  font-size: 0.9375rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.contact-form input:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(43, 57, 144, 0.15);
}
.contact-form input.is-invalid,
.contact-form select.is-invalid {
  border-color: #c53030;
  background: rgba(197, 48, 48, 0.04);
}
.contact-form input.is-invalid:focus,
.contact-form select.is-invalid:focus {
  box-shadow: 0 0 0 2px rgba(197, 48, 48, 0.2);
}
.contact-form .form-field-error {
  font-size: 0.8125rem;
  color: #c53030;
  margin-top: 0.125rem;
}
.contact-form fieldset.form-field {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin: 0;
}
.contact-form fieldset legend {
  font-size: 0.875rem;
  font-weight: var(--fw-demi);
  color: var(--color-primary);
  padding: 0 0.25rem;
}
.contact-form .form-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}
.contact-form .form-options label {
  font-weight: var(--fw-regular);
  color: var(--color-text);
  font-size: 0.9375rem;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.contact-form .form-options input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--color-primary);
}
.contact-form button[type="submit"] {
  margin-top: var(--space-sm);
  align-self: start;
}

/* Country combobox — searchable dropdown */
.contact-form .country-combobox {
  position: relative;
  width: 100%;
}
.contact-form .country-combobox input {
  width: 100%;
  box-sizing: border-box;
}
.contact-form .country-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  max-height: 12rem;
  overflow-y: auto;
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: 10;
}
.contact-form .country-dropdown.is-open {
  display: block;
}
.contact-form .country-dropdown[hidden] {
  display: none;
}
.contact-form .country-dropdown li {
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  cursor: pointer;
  color: var(--color-text);
}
.contact-form .country-dropdown li:hover,
.contact-form .country-dropdown li[aria-selected="true"] {
  background: var(--color-bg-alt);
}

@media (max-width: 768px) {
  .stat-callouts {
    grid-template-columns: 1fr;
  }
  .benefit-cards {
    grid-template-columns: 1fr;
  }
}

/* ----------------------------------------------------------------
   7. BUTTONS
   ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.625rem 1.375rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: var(--fw-demi);
  line-height: 1;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    color var(--transition-base),
    transform var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-rich-green);
  border-color: var(--color-rich-green);
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn-secondary:hover {
  background-color: rgba(255,255,255,0.15);
  color: var(--color-white);
}

/* LinkedIn brand button (e.g. "Follow us on LinkedIn") */
.btn-linkedin {
  background-color: #0A66C2;
  border-color: #0A66C2;
  color: var(--color-white);
}

.btn-linkedin:hover {
  background-color: #004182;
  border-color: #004182;
  color: var(--color-white);
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: 1rem;
}

/* ----------------------------------------------------------------
   8. HEADER
   ---------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, #f8f9fc 0%, #f2f4f8 100%);
  border-bottom: 1px solid rgba(43, 57, 144, 0.08);
  box-shadow: 0 1px 2px rgba(43, 57, 144, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  padding-block: var(--space-md);
}

.site-logo {
  flex-shrink: 0;
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo-img {
  height: 52px;
  width: auto;
}

/* Navigation — right-aligned */
.primary-nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-menu a {
  font-size: 0.9375rem;
  font-weight: var(--fw-demi);
  color: var(--color-text);
  text-decoration: none;
  padding-block: var(--space-xs);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-menu a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

.nav-item {
  position: relative;
}

.has-submenu > a {
  font-size: 0.9375rem;
  line-height: 1.4;
  padding-right: 1rem;
  position: relative;
}

.has-submenu > a::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  margin-top: -1px;
  border-width: 4px 4px 0 4px;
  border-style: solid;
  border-color: currentColor transparent transparent transparent;
}

.nav-submenu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: var(--space-md);
  padding-top: 0.35rem;
  margin: 0;
  list-style: none;
  background-color: var(--color-white);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  border: 1px solid var(--color-border);
  border-top: none;
  box-shadow: var(--shadow-md);
  display: none;
  z-index: 10;
}

/* Invisible bridge so cursor can move from parent to submenu without losing hover */
.nav-submenu::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 100%;
  height: 0.5rem;
}

.nav-submenu li + li {
  margin-top: var(--space-xs);
}

.nav-submenu a {
  display: block;
  font-size: 0.875rem;
  font-weight: var(--fw-regular);
  padding-block: 0.25rem;
}

.has-submenu:hover > .nav-submenu,
.has-submenu:focus-within > .nav-submenu {
  display: block;
}

/* Hamburger — mobile */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--color-text);
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 22px;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
  left: 0;
}

.hamburger::before { top: -6px; }
.hamburger::after  { top:  6px; }

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
    order: 3;
  }

  .primary-nav {
    order: 4;
    flex: none;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) var(--container-pad);
    box-shadow: var(--shadow-md);
  }

  .nav-submenu {
    position: static;
    box-shadow: none;
    border: none;
    padding: 0.25rem 0 0 0;
    margin-top: 0.25rem;
  }

  .nav-submenu a {
    padding-block: 0.2rem;
  }

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

  .nav-menu li {
    width: 100%;
  }

  .nav-menu a {
    display: block;
    padding-block: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
    border-left: none;
  }

  .nav-menu li:last-child a {
    border-bottom: none;
  }

  .header-inner {
    flex-wrap: wrap;
    position: relative;
  }
}

/* ----------------------------------------------------------------
   9. HERO
   ---------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #e8ecf5; /* very light blue-grey fallback */
}

/* Background layers */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-picture {
  display: block;
  position: absolute;
  inset: 0;
}

.hero-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(1.25);
  transition: opacity var(--transition-slow);
}

/* Inline SVG hero (when used instead of img) */
.hero-picture svg.hero-image {
  object-fit: cover;
}

/* Very light overlay for text legibility */
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(43,57,144,0.03) 0%,
    transparent 100%
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  padding-block: var(--space-4xl);
}

.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: var(--fw-demi);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-bright-blue);
  margin-bottom: var(--space-md);
}

.hero-heading {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--fw-demi);
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: var(--space-2xl);
}

.hero-heading span {
  display: block;
}

/* Accent the first line */
.hero-heading span:first-child {
  color: var(--color-bright-green);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

@media (max-width: 480px) {
  .hero {
    min-height: 80vh;
  }

  .hero-ctas {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ----------------------------------------------------------------
   10. SECTION CONTENT
   ---------------------------------------------------------------- */
.section-body p:last-child {
  margin-bottom: 0;
}

/* Legal prose (copyright, privacy, terms) */
.legal-prose {
  max-width: 720px;
}
.legal-prose h2 {
  font-size: 1.1rem;
  font-weight: var(--fw-demi);
  color: var(--color-primary);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.legal-prose h2:first-child {
  margin-top: 0;
}
.legal-prose h3 {
  font-size: 1rem;
  font-weight: var(--fw-demi);
  color: var(--color-text);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}
.legal-prose p {
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
}
.legal-prose ul {
  margin: var(--space-md) 0 var(--space-lg);
  padding-left: var(--space-xl);
  color: var(--color-text-muted);
}
.legal-prose li {
  margin-bottom: var(--space-sm);
}
.legal-prose li:last-child {
  margin-bottom: 0;
}
.legal-prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* FAQ Search */
.faq-search-wrap {
  max-width: 720px;
  margin-bottom: var(--space-2xl);
}
.faq-search {
  display: block;
  width: 100%;
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.faq-search::placeholder {
  color: var(--color-text-muted);
  opacity: 0.8;
}
.faq-search:hover {
  border-color: rgba(43, 57, 144, 0.25);
}
.faq-search:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(43, 57, 144, 0.15);
}
.faq-search-hint {
  display: block;
  margin-top: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.faq-item.is-hidden {
  display: none;
}

/* FAQ Accordion */
.faq-accordion {
  max-width: 720px;
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  margin-bottom: var(--space-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.faq-item:hover {
  border-color: rgba(43, 57, 144, 0.2);
  box-shadow: var(--shadow-md);
}
.faq-item[open] {
  border-color: rgba(43, 57, 144, 0.3);
  box-shadow: var(--shadow-md);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
  font-weight: var(--fw-demi);
  font-size: 1rem;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background-color var(--transition-fast);
}
.faq-question::-webkit-details-marker,
.faq-question::marker {
  display: none;
}
.faq-question::after {
  content: "";
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: rotate(45deg);
  margin-left: auto;
  transition: transform var(--transition-base);
}
.faq-item[open] .faq-question::after {
  transform: rotate(-135deg);
}
.faq-question:hover {
  background-color: rgba(43, 57, 144, 0.04);
}
.faq-answer {
  padding: 0 var(--space-xl) var(--space-lg);
}
.faq-answer p {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}
.faq-answer p:last-child {
  margin-bottom: 0;
}
.faq-answer ul {
  margin: var(--space-sm) 0 var(--space-md);
  padding-left: var(--space-xl);
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}
.faq-answer li {
  margin-bottom: var(--space-xs);
}
.faq-answer a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.faq-cta {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}
.faq-cta a {
  color: var(--color-primary);
  font-weight: var(--fw-demi);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Feature list */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.feature-list li {
  padding-left: var(--space-md);
  position: relative;
  color: var(--color-text-muted);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

/* Visual card */
.visual-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  box-shadow: var(--shadow-md);
}

.visual-card--tech {
  background: linear-gradient(135deg, #f0f4ff 0%, #e8f9f2 100%);
}

.visual-card--projects {
  padding: 0;
  overflow: hidden;
}

/* Climate action technology & projects: tighter spacing, proportionate images */
.section--climate-pair {
  padding-block: var(--space-2xl);
}

.section-grid--climate {
  gap: var(--space-lg);
  align-items: start;
  grid-template-columns: 1.12fr 0.88fr;
}

.section-grid--climate .section-visual {
  display: flex;
  justify-content: center;
}

.section-grid--climate.reverse {
  direction: rtl;
}

.section-grid--climate.reverse > * {
  direction: ltr;
}

.section-grid--climate .visual-card--projects {
  width: fit-content;
  max-width: 100%;
}

.section-grid--climate .visual-card--projects .section-img {
  width: auto;
  max-width: 100%;
  max-height: min(340px, 48vh);
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  vertical-align: top;
}

/* Climate action technology has more text — allow larger image for balance */
#climate-action-tech .section-grid--climate .visual-card--projects .section-img {
  max-height: min(440px, 56vh);
}

@media (max-width: 768px) {
  .section-grid--climate,
  .section-grid--climate.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .section-grid--climate .visual-card--projects .section-img {
    max-height: min(280px, 40vh);
  }

  #climate-action-tech .section-grid--climate .visual-card--projects .section-img {
    max-height: min(340px, 48vh);
  }
}

.section-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
}

.visual-label {
  font-size: 0.875rem;
  font-weight: var(--fw-demi);
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 0;
}

/* Proof point blockquote */
.proof-point {
  margin-top: var(--space-xl);
  padding: var(--space-lg) var(--space-xl);
  background: linear-gradient(135deg, #e8f9f2 0%, #d4f0e4 100%);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.proof-point p {
  font-weight: var(--fw-demi);
  color: var(--color-rich-green);
  font-size: 1.0625rem;
  margin-bottom: 0;
  font-style: italic;
}

/* ----------------------------------------------------------------
   11. WHAT WE DO — CARDS
   ---------------------------------------------------------------- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.card-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.card-title {
  font-size: 1.25rem;
  font-weight: var(--fw-demi);
  color: var(--color-primary);
}

.card-body {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 0;
}

/* ----------------------------------------------------------------
   12. PLATFORM PROOF POINTS
   ---------------------------------------------------------------- */
.proof-points-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  list-style: none;
}

.proof-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.proof-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  line-height: 1;
}

.proof-icon--svg svg {
  width: 1em;
  height: 1em;
  vertical-align: -0.2em;
}

.proof-item p {
  color: rgba(255,255,255,0.85);
  font-size: 0.9375rem;
  margin-bottom: 0;
}

.proof-item strong {
  color: var(--color-white);
}

/* Proof items on light section-dark (homepage) */
.section-dark .proof-item {
  background: rgba(255,255,255,0.85);
  border: 1px solid rgba(43, 57, 144, 0.12);
}

.section-dark .proof-item p {
  color: var(--color-text-muted);
}

.section-dark .proof-item strong {
  color: var(--color-primary);
}

.section-dark .proof-icon,
.section-dark .proof-icon--svg {
  color: var(--color-primary);
}

/* ----------------------------------------------------------------
   13. CLIENTS
   ---------------------------------------------------------------- */
.clients-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md) var(--space-xl);
  list-style: none;
  margin-top: var(--space-xl);
}

.client-item {
  padding: var(--space-sm) var(--space-lg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
}

.client-item img,
.client-item--svg .client-logo {
  max-width: 120px;
  max-height: 36px;
  width: auto;
  height: auto;
  object-fit: contain;
  vertical-align: middle;
}

.client-item:hover {
  border-color: var(--color-accent);
  color: var(--color-primary);
}

/* ----------------------------------------------------------------
   14. CTA SECTION
   ---------------------------------------------------------------- */
.cta-sub {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  max-width: 560px;
  margin-inline: auto;
}

/* ----------------------------------------------------------------
   15. FOOTER
   ---------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-2xl);
  padding-block: var(--space-3xl);
}

@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }
}

.footer-logo {
  height: 36px;
  width: auto;
  margin-bottom: var(--space-lg);
  /* Invert to white on dark background */
  filter: brightness(0) invert(1);
}

.footer-contact {
  font-style: normal;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-contact p {
  color: var(--color-footer-text);
  font-size: 0.9rem;
  margin-bottom: 0;
}

.footer-contact a {
  color: var(--color-footer-link);
  text-decoration: none;
}

.footer-contact a:hover {
  color: var(--color-bright-green);
  text-decoration: underline;
}

.business-hours {
  font-size: 0.8125rem;
  opacity: 0.7;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  list-style: none;
}

.footer-nav a {
  color: var(--color-footer-link);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-bright-green);
  text-decoration: underline;
}

.footer-social-label {
  font-size: 0.8125rem;
  font-weight: var(--fw-demi);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-md);
}

.social-list {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.social-list a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: var(--color-white);
  text-decoration: none;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.social-list a:hover {
  background-color: var(--color-accent);
  transform: translateY(-2px);
}

/* Footer bottom bar */
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-block: var(--space-lg);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}

.sustainability-note {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.copyright {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0;
}

/* ----------------------------------------------------------------
   16. PRINT
   ---------------------------------------------------------------- */
@media print {
  .site-header,
  .hero-bg,
  .nav-toggle,
  .hero-ctas,
  .footer-social,
  .footer-bottom {
    display: none !important;
  }

  body {
    font-size: 12pt;
    color: #000;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }

  .section {
    padding-block: 1rem;
  }
}