/* =======================
   Birkdale Stone — Theme CSS
   ======================= */

:root {
  --bg: #FAF7F2;
  --surface: #F2EDE6;
  --surface-dark: #E8E0D5;
  --forest: #2D5016;
  --forest-light: #3D6B1E;
  --sand: #C4A882;
  --sand-light: #D9C9AE;
  --text: #1C1C1A;
  --text-mid: #4A4A44;
  --text-light: #7A7A70;
  --white: #FFFFFF;
  --border: #E0D8CC;
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { font-family: 'Libre Baskerville', Georgia, serif; font-weight: 700; line-height: 1.2; }
a { color: inherit; text-decoration: none; }
details summary { cursor: pointer; }

/* ---- TYPOGRAPHY ---- */
.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sand);
  margin-bottom: 0.75rem;
}
.section-headline {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--text);
  margin-bottom: 1rem;
}

/* ---- HEADER ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.logo-mark {
  font-size: 1rem;
  color: var(--forest);
}
.logo-name {
  font-family: 'Libre Baskerville', Georgia, serif;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--text);
}
.header-nav {
  display: flex;
  gap: 2rem;
}
.header-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-mid);
  transition: color 0.2s;
}
.header-nav a:hover { color: var(--forest); }

/* ---- HERO ---- */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 2rem 4rem;
  overflow: hidden;
}
.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 4rem;
}
.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sand);
  margin-bottom: 1.25rem;
}
.hero-headline {
  font-size: clamp(2.5rem, 4.5vw, 3.75rem);
  line-height: 1.1;
  margin-bottom: 1.5rem;
  color: var(--text);
}
.hero-sub {
  font-size: 1.125rem;
  color: var(--text-mid);
  max-width: 440px;
  line-height: 1.65;
}

/* Stone visual block */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.stone-block {
  position: relative;
  width: 100%;
  max-width: 420px;
}
.stone-slab {
  border-radius: 2px;
  position: absolute;
}
.slab-1 {
  width: 100%;
  height: 280px;
  background: linear-gradient(135deg, #F0EDE8 0%, #E8E2DA 40%, #D8D0C4 100%);
  border: 1px solid #D0C8BC;
  top: 0; left: 0;
  box-shadow: 4px 4px 0 rgba(44,32,8,0.12), 8px 8px 0 rgba(44,32,8,0.06);
}
.slab-2 {
  width: 88%;
  height: 220px;
  background: linear-gradient(135deg, #ECE9E2 0%, #E4DDD2 40%, #D4CBBD 100%);
  border: 1px solid #C8BFAF;
  top: 30px; left: 30px;
  box-shadow: 3px 3px 0 rgba(44,32,8,0.10), 6px 6px 0 rgba(44,32,8,0.05);
}
.slab-3 {
  width: 76%;
  height: 180px;
  background: linear-gradient(135deg, #F5F2EE 0%, #EDE8E0 30%, #DDD5C8 70%, #CAC0B0 100%);
  border: 1px solid #BEB4A4;
  top: 60px; left: 55px;
  box-shadow: 2px 2px 0 rgba(44,32,8,0.08), 4px 4px 0 rgba(44,32,8,0.04);
}
.stone-label {
  margin-top: 260px;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
}
.slab-name {
  display: block;
  font-family: 'Libre Baskerville', Georgia, serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--forest);
  margin-bottom: 0.25rem;
}
.slab-note {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* Hero stat row */
.hero-stat-row {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.hero-stat { flex: 1; }
.stat-num {
  display: block;
  font-family: 'Libre Baskerville', Georgia, serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--forest);
  margin-bottom: 0.25rem;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.4;
}
.hero-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
  flex-shrink: 0;
}

/* ---- MATERIALS ---- */
.materials {
  background: var(--surface);
  padding: 5rem 2rem;
}
.section-header {
  max-width: 1200px;
  margin: 0 auto 3.5rem;
}
.material-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}
.material-card {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 2rem 1.75rem;
  border-radius: 2px;
  transition: box-shadow 0.2s;
}
.material-card:hover {
  box-shadow: 0 4px 20px rgba(44,32,8,0.08);
}
.material-icon {
  font-size: 1.5rem;
  color: var(--sand);
  margin-bottom: 1rem;
}
.material-card h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.material-card p {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.6;
}
.material-footnote {
  max-width: 1200px;
  margin: 2rem auto 0;
  font-size: 0.8rem;
  color: var(--text-light);
  text-align: center;
  font-style: italic;
}

/* ---- PROCESS ---- */
.process {
  padding: 5rem 2rem;
  background: var(--bg);
}
.process-inner {
  max-width: 900px;
  margin: 0 auto;
}
.process-header {
  margin-bottom: 3.5rem;
}
.process-intro {
  font-size: 1.1rem;
  color: var(--text-mid);
  margin-top: 0.5rem;
}
.step-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.step:first-child { border-top: 1px solid var(--border); }
.step-num {
  font-family: 'Libre Baskerville', Georgia, serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--sand-light);
  line-height: 1;
  padding-top: 0.2rem;
}
.step-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}
.step-body p {
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.65;
}

/* ---- AREAS ---- */
.areas {
  padding: 5rem 2rem;
  background: var(--surface);
}
.areas-header {
  max-width: 1200px;
  margin: 0 auto 3rem;
}
.areas-grid {
  max-width: 1200px;
  margin: 0 auto 3rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}
.area-city {
  padding: 1.75rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 2px;
}
.area-city h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--forest);
}
.area-city p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.6;
}
.area-map-block {
  max-width: 1200px;
  margin: 0 auto;
}
.map-placeholder {
  background: var(--surface-dark);
  border: 1px solid var(--border);
  border-radius: 2px;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.map-inner { text-align: center; }
.map-pin-row {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-bottom: 1rem;
}
.map-pin {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-mid);
}
.map-pin span {
  color: var(--forest);
  font-size: 0.7rem;
}
.map-note {
  font-size: 0.75rem;
  color: var(--text-light);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---- FAQ ---- */
.faq {
  padding: 5rem 2rem;
  background: var(--bg);
}
.faq-header {
  max-width: 800px;
  margin: 0 auto 3rem;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-item summary {
  padding: 1.5rem 0;
  font-family: 'Libre Baskerville', Georgia, serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--sand);
  font-weight: 300;
  flex-shrink: 0;
  transition: transform 0.2s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p {
  padding-bottom: 1.5rem;
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.7;
}

/* ---- CLOSING ---- */
.closing {
  padding: 5rem 2rem;
  background: var(--forest);
}
.closing-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}
.closing h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--white);
  margin-bottom: 1.25rem;
}
.closing p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.65;
  margin-bottom: 2rem;
}
.closing-detail {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 2px;
  padding: 1.25rem 1.5rem;
  text-align: left;
}
.closing-detail span {
  font-size: 0.75rem;
  color: var(--sand-light);
  flex-shrink: 0;
  margin-top: 0.15rem;
}
.closing-detail p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0;
}

/* ---- FOOTER ---- */
.site-footer {
  padding: 3rem 2rem;
  background: var(--text);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.footer-brand .logo-mark { color: var(--sand-light); }
.footer-brand .logo-name {
  color: var(--white);
  font-size: 1rem;
}
.footer-tagline {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  margin-top: 0.25rem;
}
.footer-note {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
  margin-top: 0.5rem;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .hero-visual { order: -1; }
  .stone-block { max-width: 300px; }
  .slab-1 { height: 200px; }
  .slab-2 { height: 160px; }
  .slab-3 { height: 130px; }
  .stone-label { margin-top: 190px; }
  .hero-stat-row {
    flex-direction: column;
    gap: 1.5rem;
    align-items: flex-start;
  }
  .hero-divider { display: none; }
  .header-nav { display: none; }
  .step { grid-template-columns: 56px 1fr; gap: 1rem; }
  .step-num { font-size: 1.5rem; }
  .hero { padding: 3rem 1.25rem 3rem; }
  .materials, .process, .areas, .faq, .closing { padding: 4rem 1.25rem; }
}