/* ==========================================================================
   Builders Croydon — Design Tokens
   Concept: the builder's blueprint & spirit level — ink-navy ground,
   brass-gold accent, dimension-line signature motif.
   Display: Archivo Black (blunt, structural, sits like stencilled site signage)
   Body: Source Sans 3
   Data/labels: IBM Plex Mono (measurements, spec sheet feel)
   ========================================================================== */

:root {
  --ink: #10131c;
  --ink-2: #171b27;
  --ink-3: #1f2432;
  --gold: #d9a91a;
  --gold-dim: #a8830f;
  --slate: #9aa2b2;
  --slate-dark: #565c6b;
  --cream: #f3f1ea;
  --line: rgba(243, 241, 234, 0.12);

  --font-display: 'Archivo Black', sans-serif;
  --font-body: 'Source Sans 3', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.01em;
  font-weight: 400;
  margin: 0 0 0.5em;
  line-height: 1.1;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.2rem; }

p { margin: 0 0 1em; color: var(--slate); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.eyebrow {
  font-family: var(--font-mono);
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.76rem;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.eyebrow::before { content: ''; width: 20px; height: 2px; background: var(--gold); }

/* ---------- Dimension-line signature (spirit-level / blueprint motif) ---------- */
.dim-line {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  margin: 0 auto 40px;
  width: fit-content;
}
.dim-line::before, .dim-line::after {
  content: '';
  width: 60px;
  height: 1px;
  background: var(--gold);
  position: relative;
}
.dim-line::before { background-image: linear-gradient(90deg, var(--gold) 1px, transparent 1px); background-size: 8px 100%; }
.dim-line::after { background-image: linear-gradient(90deg, var(--gold) 1px, transparent 1px); background-size: 8px 100%; }

.blueprint-grid {
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 42px 42px;
}

.level-rule {
  height: 1px;
  background: var(--line);
  margin: 46px 0;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(16, 19, 28, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: var(--container); margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 38px; height: 38px;
  border: 2px solid var(--gold);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); color: var(--gold); font-size: 0.85rem; font-weight: 700;
  transform: rotate(45deg);
}
.brand-mark span { transform: rotate(-45deg); }
.brand-text {
  font-family: var(--font-display); text-transform: uppercase; font-size: 1rem; letter-spacing: 0.01em;
}
.brand-text span { color: var(--gold); }

nav.main-nav { display: flex; align-items: center; }
.nav-links { display: flex; gap: 26px; }
.nav-links a {
  font-size: 0.88rem; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--slate); transition: color 0.2s; padding: 6px 0; border-bottom: 2px solid transparent;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold); border-bottom-color: var(--gold); }

.call-btn {
  font-family: var(--font-mono); background: var(--gold); color: var(--ink);
  padding: 11px 20px; font-weight: 700; font-size: 0.9rem;
  display: flex; align-items: center; gap: 8px; transition: background 0.15s, transform 0.15s;
}
.call-btn:hover { background: #f0c53b; transform: translateY(-2px); }

.nav-toggle { display: none; background: none; border: none; color: var(--cream); font-size: 1.6rem; cursor: pointer; }

@media (max-width: 880px) {
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--ink-2); border-bottom: 1px solid var(--line); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 16px 24px; border-bottom: 1px solid var(--line); width: 100%; }
  .nav-toggle { display: block; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; padding: 84px 0 96px; overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero .lead { font-size: 1.1rem; max-width: 46ch; }
.hero-actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

.btn {
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.03em;
  padding: 15px 28px; font-size: 0.88rem; font-weight: 700;
  display: inline-flex; align-items: center; gap: 10px; transition: transform 0.15s, background 0.15s;
  border-radius: 2px;
}
.btn-primary { background: var(--gold); color: var(--ink); }
.btn-primary:hover { transform: translateY(-2px); background: #f0c53b; }
.btn-outline { border: 1.5px solid var(--line); color: var(--cream); }
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }

.spec-card {
  border: 1px solid var(--line); background: var(--ink-2); padding: 26px;
}
.spec-row { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px dashed var(--line); font-family: var(--font-mono); font-size: 0.88rem; }
.spec-row:last-child { border-bottom: none; }
.spec-row span:first-child { color: var(--slate); text-transform: uppercase; letter-spacing: 0.04em; font-size: 0.76rem; }
.spec-row span:last-child { color: var(--cream); }

/* ---------- Trust strip ---------- */
.trust-strip { border-bottom: 1px solid var(--line); padding: 20px 0; }
.trust-strip .container { display: flex; flex-wrap: wrap; gap: 26px; justify-content: space-between; align-items: center; }
.trust-item {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--slate);
  text-transform: uppercase; letter-spacing: 0.05em; display: flex; align-items: center; gap: 8px;
}
.trust-item::before { content: '\2713'; color: var(--gold); }

/* ---------- Sections ---------- */
section { padding: 84px 0; }
.section-head { max-width: 60ch; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* Services grid */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 900px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .services-grid { grid-template-columns: 1fr; } }

.service-card {
  background: var(--ink-2); border: 1px solid var(--line); padding: 30px;
  transition: border-color 0.2s, transform 0.2s; position: relative;
}
.service-card:hover { border-color: var(--gold); transform: translateY(-3px); }
.service-card .tag { font-family: var(--font-mono); color: var(--gold); font-size: 0.74rem; letter-spacing: 0.06em; text-transform: uppercase; }
.service-card h3 { margin: 10px 0 8px; }
.service-card p { font-size: 0.92rem; margin-bottom: 0; }

/* Process timeline - horizontal steps with dimension ticks */
.steps-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative; }
@media (max-width: 800px) { .steps-row { grid-template-columns: 1fr; gap: 30px; } }
.step {
  padding: 0 20px; position: relative; text-align: center;
}
.step::before {
  content: attr(data-n);
  display: block; width: 46px; height: 46px; line-height: 46px;
  border: 1px solid var(--gold); color: var(--gold); font-family: var(--font-mono);
  margin: 0 auto 18px; font-size: 0.95rem;
}
.step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.step p { font-size: 0.9rem; }

/* Areas grid */
.areas-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 700px) { .areas-grid { grid-template-columns: 1fr; } }
.area-card {
  background: var(--ink-2); border: 1px solid var(--line); padding: 26px;
  transition: border-color 0.2s;
}
.area-card:hover { border-color: var(--gold); }
.area-card h3 { margin-bottom: 8px; }
.area-card p { font-size: 0.9rem; margin-bottom: 0; }

/* FAQ */
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq-item summary {
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.02em;
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center;
  color: var(--cream); font-size: 0.92rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; color: var(--gold); font-size: 1.3rem; }
.faq-item[open] summary::after { content: '\2212'; }
.faq-item p { margin-top: 12px; margin-bottom: 0; }

/* CTA band */
.cta-band { background: var(--gold); color: var(--ink); padding: 56px 0; }
.cta-band .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 24px; }
.cta-band h2 { color: var(--ink); margin: 0; }
.cta-band p { color: #4a3a05; margin: 4px 0 0; }
.cta-band .btn-primary { background: var(--ink); color: var(--gold); }
.cta-band .btn-primary:hover { background: #23283a; }

/* Footer */
footer.site-footer { border-top: 1px solid var(--line); padding: 56px 0 28px; background: var(--ink-2); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 30px; margin-bottom: 40px; }
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-grid h4 { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.76rem; color: var(--gold); margin-bottom: 16px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { color: var(--slate); font-size: 0.92rem; }
.footer-grid a:hover { color: var(--gold); }
.footer-bottom {
  border-top: 1px solid var(--line); padding-top: 24px; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 10px; font-size: 0.78rem; color: var(--slate-dark); font-family: var(--font-mono);
}

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

.page-hero { padding: 56px 0 46px; border-bottom: 1px solid var(--line); }
.breadcrumb {
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--slate-dark);
  text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 18px;
}
.breadcrumb a { color: var(--slate); }
.breadcrumb a:hover { color: var(--gold); }

.error-page { text-align: center; padding: 120px 0; }
.error-page .code { font-family: var(--font-display); font-size: 5.5rem; color: var(--gold); line-height: 1; }