/* ===================================================================
   EPC Carbon Zero — site styles
   Approach: clean, trustworthy, trades-appropriate.
   Restrained palette, strong type hierarchy, no flourishes.
=================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  --green-900: #143324;
  --green-800: #1c4631;
  --green-700: #245b3f;
  --green-600: #2f7551;
  --green-500: #3d9266;
  --green-100: #e6f0ea;
  --green-50:  #f3f8f5;

  --ink-900: #161613;
  --ink-700: #34352f;
  --ink-500: #6c6d65;
  --ink-300: #b4b5ad;
  --ink-100: #e8e8e3;
  --ink-50:  #f6f5f0;

  --cream: #faf9f4;
  --white: #ffffff;

  --serif: 'Fraunces', Georgia, 'Times New Roman', serif;
  --sans:  'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  --container: 1180px;
  --container-tight: 760px;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  --radius: 6px;
  --radius-lg: 12px;

  --shadow-soft: 0 1px 3px rgba(20, 51, 36, 0.04), 0 4px 12px rgba(20, 51, 36, 0.04);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-700);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a { color: var(--green-700); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--green-900); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  color: var(--ink-900);
  line-height: 1.15;
  margin: 0 0 var(--space-3);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); font-weight: 500; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; font-family: var(--sans); font-weight: 600; letter-spacing: -0.01em; }

p { margin: 0 0 var(--space-3); }

ul { padding-left: 1.5em; margin: 0 0 var(--space-3); }
li { margin-bottom: 0.5em; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.container-tight {
  width: 100%;
  max-width: var(--container-tight);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* === Header ============================================ */

.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--ink-100);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
  gap: var(--space-3);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.logo img {
  height: 80px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-links {
  display: flex;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--ink-700);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover { color: var(--green-700); }
.nav-links a.active { color: var(--green-700); }

.nav-cta {
  background: var(--green-700);
  color: var(--white);
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s ease;
}

.nav-cta:hover { background: var(--green-800); color: var(--white); }

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--ink-300);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  cursor: pointer;
  color: var(--ink-700);
  font-family: inherit;
}

/* === Hero ============================================== */

.hero {
  padding: var(--space-7) 0 var(--space-6);
  background: linear-gradient(180deg, var(--white) 0%, var(--cream) 100%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-5);
  align-items: center;
}

.hero h1 {
  margin-bottom: var(--space-3);
}

.hero p.lede {
  font-size: 1.2rem;
  color: var(--ink-700);
  line-height: 1.55;
  margin-bottom: var(--space-4);
  max-width: 32em;
}

.hero-ctas {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  font-size: 1rem;
  border: 1.5px solid transparent;
  transition: all 0.15s ease;
  cursor: pointer;
  font-family: inherit;
}

.btn-primary {
  background: var(--green-700);
  color: var(--white);
  border-color: var(--green-700);
}

.btn-primary:hover {
  background: var(--green-800);
  border-color: var(--green-800);
  color: var(--white);
}

.btn-secondary {
  background: transparent;
  color: var(--green-700);
  border-color: var(--green-700);
}

.btn-secondary:hover {
  background: var(--green-50);
  color: var(--green-800);
}

.hero-image-placeholder {
  background: var(--green-50);
  border: 1px dashed var(--green-500);
  border-radius: var(--radius-lg);
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-700);
  font-style: italic;
  font-size: 0.95rem;
  text-align: center;
  padding: 2rem;
}

/* === Sections ========================================== */

section { padding: var(--space-6) 0; }

section.tight { padding: var(--space-5) 0; }

.section-title {
  text-align: center;
  margin-bottom: var(--space-5);
}

.section-title h2 {
  margin-bottom: var(--space-2);
}

.section-title p {
  color: var(--ink-500);
  font-size: 1.1rem;
  max-width: 36em;
  margin: 0 auto;
}

/* === Trust strip ======================================= */

.trust-strip {
  padding: var(--space-3) 0;
  background: var(--green-50);
  border-top: 1px solid var(--green-100);
  border-bottom: 1px solid var(--green-100);
  color: var(--green-800);
  font-size: 0.95rem;
}

.trust-strip strong { font-weight: 600; }

.trust-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  align-items: center;
}

.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.trust-item svg {
  flex-shrink: 0;
  color: var(--green-700);
}

@media (max-width: 640px) {
  .trust-items { gap: var(--space-2); font-size: 0.9rem; }
}

/* === Credentials section =============================== */

.credentials {
  background: var(--white);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--ink-100);
  border-bottom: 1px solid var(--ink-100);
}

.credentials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
  max-width: 1000px;
  margin: 0 auto;
}

.credential {
  text-align: center;
  padding: var(--space-3) var(--space-2);
}

.credential-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-2);
  background: var(--green-50);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-700);
}

.credential-logo-slot {
  width: 140px;
  height: 80px;
  margin: 0 auto var(--space-2);
  background: var(--green-50);
  border: 1px dashed var(--green-500);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-700);
  font-style: italic;
  font-size: 0.8rem;
  text-align: center;
  padding: 0.5rem;
  line-height: 1.3;
}

.credential h4 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink-900);
  margin-bottom: var(--space-1);
  letter-spacing: -0.005em;
}

.credential p {
  color: var(--ink-500);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0;
}

/* === Services / Card grid ============================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-3);
}

.card {
  background: var(--white);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--ink-100);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover {
  border-color: var(--green-500);
}

.card h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.card p {
  color: var(--ink-500);
  margin-bottom: 0;
  font-size: 0.95rem;
}

.card .card-meta {
  margin-top: var(--space-2);
  font-size: 0.85rem;
  color: var(--green-700);
  font-weight: 600;
}

/* === Why us / Feature list ============================= */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.feature h4 {
  color: var(--green-800);
  margin-bottom: var(--space-1);
}

.feature p {
  color: var(--ink-500);
  font-size: 0.95rem;
  margin: 0;
}

/* === Areas ============================================ */

.areas-section {
  background: var(--green-50);
}

.areas-list {
  columns: 3;
  column-gap: var(--space-4);
  font-size: 1rem;
  color: var(--ink-700);
  max-width: 800px;
  margin: 0 auto;
}

.areas-list li {
  list-style: none;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--green-100);
  break-inside: avoid;
}

@media (max-width: 700px) {
  .areas-list { columns: 2; }
}

@media (max-width: 480px) {
  .areas-list { columns: 1; }
}

/* === Testimonial ====================================== */

.testimonial {
  background: var(--green-800);
  color: var(--white);
  padding: var(--space-6) 0;
  position: relative;
}

.testimonial blockquote {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: -0.015em;
  margin: 0 auto var(--space-3);
  max-width: 36em;
  text-align: center;
}

.testimonial cite {
  display: block;
  text-align: center;
  font-style: normal;
  color: var(--green-100);
  font-size: 0.95rem;
  font-weight: 500;
}

/* === Final CTA ======================================== */

.cta-section {
  text-align: center;
  padding: var(--space-7) 0;
  background: var(--cream);
}

.cta-section h2 { margin-bottom: var(--space-3); }
.cta-section p { color: var(--ink-500); font-size: 1.1rem; margin-bottom: var(--space-4); }

.cta-contact-row {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-3);
  font-size: 1.05rem;
}

.cta-contact-row a {
  color: var(--green-700);
  font-weight: 600;
  text-decoration: none;
}

.cta-contact-row a:hover { color: var(--green-900); text-decoration: underline; }

/* === Footer =========================================== */

.site-footer {
  background: var(--ink-900);
  color: var(--ink-300);
  padding: var(--space-5) 0 var(--space-4);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.footer-grid h4 {
  color: var(--white);
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid li { margin-bottom: 0.5em; }

.footer-grid a {
  color: var(--ink-300);
  text-decoration: none;
}

.footer-grid a:hover { color: var(--white); }

.footer-grid .brand-blurb {
  color: var(--ink-300);
  font-size: 0.95rem;
  max-width: 28em;
}

.footer-bottom {
  border-top: 1px solid #2a2a26;
  padding-top: var(--space-3);
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--ink-500);
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* === Page content (services, about, areas, faq, etc) === */

.page-header {
  padding: var(--space-6) 0 var(--space-4);
  background: var(--white);
  border-bottom: 1px solid var(--ink-100);
}

.page-header h1 {
  margin-bottom: var(--space-2);
}

.page-header .lede {
  color: var(--ink-500);
  font-size: 1.2rem;
  max-width: 38em;
}

.prose {
  max-width: var(--container-tight);
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.75;
}

.prose h2 { margin-top: var(--space-5); }
.prose h3 { margin-top: var(--space-4); font-family: var(--sans); font-weight: 600; font-size: 1.2rem; }

.prose ul { margin-bottom: var(--space-3); }
.prose li { margin-bottom: 0.5em; }

.prose p:has(+ ul), .prose p:has(+ ol) { margin-bottom: var(--space-2); }

/* === FAQ ============================================== */

.faq-list {
  max-width: var(--container-tight);
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--ink-100);
  padding: var(--space-3) 0;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--ink-900);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-1) 0;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-family: var(--serif);
  font-size: 1.6rem;
  color: var(--green-700);
  font-weight: 300;
  transition: transform 0.2s ease;
  flex-shrink: 0;
  margin-left: 1rem;
}

.faq-item[open] summary::after { content: '−'; }

.faq-item summary:hover { color: var(--green-700); }

.faq-answer {
  padding: var(--space-2) 0 var(--space-1);
  color: var(--ink-700);
  font-size: 1rem;
  line-height: 1.7;
}

.faq-answer p:last-child { margin-bottom: 0; }

/* === Contact ========================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  max-width: var(--container);
  margin: 0 auto;
}

.contact-card {
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.contact-card h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.15rem;
  margin-bottom: var(--space-2);
}

.contact-method {
  margin-bottom: var(--space-3);
}

.contact-method-label {
  font-size: 0.85rem;
  color: var(--ink-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.contact-method-value {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ink-900);
}

.contact-method-value a {
  color: var(--green-700);
  text-decoration: none;
}

.contact-method-value a:hover { color: var(--green-900); text-decoration: underline; }

/* === Blog =========================================== */

.blog-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  max-width: var(--container-tight);
  margin: 0 auto;
}

.blog-card {
  display: block;
  padding: var(--space-4);
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.blog-card:hover {
  border-color: var(--green-500);
  color: inherit;
  transform: translateY(-1px);
}

.blog-card h3 {
  font-family: var(--serif);
  font-weight: 500;
  margin-bottom: var(--space-2);
  color: var(--ink-900);
}

.blog-card p {
  color: var(--ink-500);
  margin-bottom: var(--space-2);
}

.blog-card .read-more {
  color: var(--green-700);
  font-weight: 600;
  font-size: 0.95rem;
}

.blog-meta {
  font-size: 0.85rem;
  color: var(--ink-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-2);
}

.blog-post {
  max-width: var(--container-tight);
  margin: 0 auto;
}

.blog-post .post-header {
  margin-bottom: var(--space-4);
}

.blog-post h1 {
  margin-bottom: var(--space-2);
}

.blog-post .post-meta {
  color: var(--ink-500);
  font-size: 0.9rem;
}

.post-cta {
  background: var(--green-50);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin: var(--space-5) 0 var(--space-3);
  border-left: 4px solid var(--green-700);
}

.post-cta h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.15rem;
  margin-bottom: var(--space-2);
  color: var(--green-900);
}

.post-cta p {
  margin-bottom: var(--space-2);
  color: var(--ink-700);
}

/* === Responsive ====================================== */

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero { padding: var(--space-5) 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  section { padding: var(--space-5) 0; }
}

@media (max-width: 640px) {
  .menu-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--ink-100);
    padding: var(--space-2);
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; padding: 0.5rem 0; }
  .nav-cta { font-size: 0.85rem; padding: 0.5rem 0.9rem; }
  .logo img { height: 56px; }
  .header-inner { position: relative; }
}

/* === Utilities ====================================== */

.text-center { text-align: center; }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }

.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;
}