/* ==========================================================================
   Building Services High Wycombe — Design System
   Palette: charcoal / steel blue / warm stone tints
   Type: Space Grotesk (display) + Inter (body) + JetBrains Mono (specs)
   Signature: blueprint grid-line divider
   ========================================================================== */

:root {
  --ink: #14213D;
  --primary: #1B4F8C;
  --primary-light: #2E6BAE;
  --accent: #3E8EDE;
  --accent-dark: #2C6BB0;
  --sky: #EAF2FA;
  --paper: #FFFFFF;
  --slate: #3B4A5C;
  --warm: #C98A3E;
  --line: #D7E6F2;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow-soft: 0 4px 24px rgba(20, 33, 61, 0.10);
  --shadow-lift: 0 12px 40px rgba(20, 33, 61, 0.16);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--slate);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.1rem, 4.5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
h3 { font-size: 1.25rem; }
p { margin-bottom: 1rem; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--font-mono); }

/* -------------------- Buttons -------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 999px; font-family: var(--font-display);
  font-weight: 600; font-size: 0.98rem; cursor: pointer; border: 2px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: var(--shadow-soft); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lift); background: var(--accent-dark); }
.btn-outline { background: transparent; border-color: rgba(255,255,255,0.5); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,0.14); }
.btn-dark { background: var(--primary); color: #fff; }
.btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); }

/* -------------------- Header -------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(252, 252, 251, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: 1180px; margin: 0 auto; gap: 24px;
}
.logo {
  font-family: var(--font-display); font-weight: 700; font-size: 1.05rem;
  color: var(--primary); display: flex; align-items: center; gap: 8px; white-space: nowrap;
}
.logo .dot { color: var(--accent); }
.main-nav { display: flex; align-items: center; gap: 2px; flex: 1; justify-content: center; }
.main-nav a {
  padding: 10px 14px; border-radius: 999px; font-weight: 500; font-size: 0.88rem;
  color: var(--slate); transition: background 0.15s ease, color 0.15s ease; white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { background: var(--sky); color: var(--primary); }
.header-cta { display: flex; align-items: center; gap: 14px; }
.phone-cta {
  display: flex; align-items: center; gap: 8px; font-family: var(--font-display); font-weight: 700;
  color: #fff; font-size: 0.96rem; padding: 10px 18px; border-radius: 999px;
  background: var(--accent); white-space: nowrap;
}
.phone-cta:hover { background: var(--accent-dark); }
@media (max-width: 1020px) { .main-nav { display: none; } }
@media (max-width: 480px) {
  .logo { font-size: 0.9rem; }
  .header-inner { gap: 12px; }
}

/* -------------------- Hero -------------------- */
.hero {
  position: relative;
  background: linear-gradient(160deg, var(--primary) 0%, #163F70 55%, #102D52 100%);
  color: #fff;
  padding: 90px 0 70px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 88% 15%, rgba(74, 127, 165, 0.32), transparent 45%),
    radial-gradient(circle at 8% 90%, rgba(74, 127, 165, 0.14), transparent 50%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero-inner { grid-template-columns: 1fr; } }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: #8FBBD9; background: rgba(74, 127, 165, 0.18); border: 1px solid rgba(74, 127, 165, 0.42);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 20px;
}
.hero h1 { color: #fff; margin-bottom: 20px; }
.hero .lede { font-size: 1.15rem; color: rgba(255,255,255,0.82); max-width: 46ch; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }
.hero-stat .num { font-family: var(--font-mono); font-size: 1.7rem; font-weight: 700; color: #8FBBD9; display: block; }
.hero-stat .lbl { font-size: 0.82rem; color: rgba(255,255,255,0.65); }

.response-panel {
  position: relative;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(6px);
}
.response-panel .spec-row {
  display: flex; justify-content: space-between; padding: 12px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.18);
  font-family: var(--font-mono); font-size: 0.92rem; color: rgba(255,255,255,0.85);
}
.response-panel .spec-row:last-child { border-bottom: none; }
.response-panel .spec-row span:last-child { color: #8FBBD9; font-weight: 600; }
.response-panel .panel-title {
  font-family: var(--font-display); color: #fff; font-size: 1rem; margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
}

/* Blueprint grid-line divider (signature element) */
.blueprint-divider {
  height: 28px;
  width: 100%;
  color: var(--accent-dark);
  opacity: 0.4;
}

/* -------------------- Sections -------------------- */
.section { padding: 84px 0; }
.section-sky { background: var(--sky); }
.section-primary { background: var(--primary); color: #fff; }
.section-primary h2, .section-primary h3 { color: #fff; }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head .eyebrow-light {
  font-family: var(--font-mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--accent-dark); margin-bottom: 10px; display: block;
}

/* Bento grid */
.bento-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.bento-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.bento-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lift); }
.bento-item.span-2 { grid-column: span 2; }
.bento-item.span-3 { grid-column: span 3; }
.bento-item.span-4 { grid-column: span 4; }
.bento-item.span-6 { grid-column: span 6; }
@media (max-width: 900px) {
  .bento-grid { grid-template-columns: 1fr; }
  .bento-item.span-2, .bento-item.span-3, .bento-item.span-4, .bento-item.span-6 { grid-column: span 1; }
}
.icon-badge {
  width: 52px; height: 52px; border-radius: 14px; background: var(--sky);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px; color: var(--accent-dark);
}
.bento-item:hover .icon-badge { background: var(--accent); color: #fff; }

/* Timeline */
.timeline { position: relative; padding-left: 36px; border-left: 2px solid var(--line); }
.timeline-step { position: relative; padding-bottom: 40px; }
.timeline-step:last-child { padding-bottom: 0; }
.timeline-step::before {
  content: ""; position: absolute; left: -43px; top: 4px; width: 16px; height: 16px;
  border-radius: 50%; background: var(--accent); border: 3px solid var(--paper); box-shadow: 0 0 0 2px var(--accent);
}
.timeline-step .step-label {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-dark); text-transform: uppercase; letter-spacing: 0.05em;
}

/* FAQ */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 40px; }
@media (max-width: 800px) { .faq-grid { grid-template-columns: 1fr; } }
.faq-item { border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq-item h3 { font-size: 1.05rem; margin-bottom: 8px; }
.faq-item p { margin-bottom: 0; color: var(--slate); font-size: 0.96rem; }

/* Split CTA */
.split-cta { display: grid; grid-template-columns: 1.2fr 1fr; background: var(--ink); color: #fff; border-radius: var(--radius); overflow: hidden; }
@media (max-width: 800px) { .split-cta { grid-template-columns: 1fr; } }
.split-cta-text { padding: 48px; }
.split-cta-text h2 { color: #fff; margin-bottom: 14px; }
.split-cta-panel { background: var(--accent); padding: 48px; display: flex; flex-direction: column; justify-content: center; gap: 16px; }
.split-cta-panel a { color: #fff; }

/* Cards */
.service-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; }
.service-card h3 { margin-bottom: 10px; }
.service-card .spec-tag {
  display: inline-block; font-family: var(--font-mono); font-size: 0.78rem;
  background: var(--sky); color: var(--accent-dark); padding: 4px 10px; border-radius: 999px; margin-right: 6px; margin-top: 12px;
}

/* Photo gallery grid */
.photo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .photo-grid { grid-template-columns: 1fr; } }
.photo-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.photo-card img { width: 100%; height: 240px; object-fit: cover; }
.photo-card .cap { padding: 16px 20px; font-size: 0.9rem; color: var(--slate); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr; } }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 800px) { .grid-2 { grid-template-columns: 1fr; } }

.areas-pill-list { display: flex; flex-wrap: wrap; gap: 10px; }
.areas-pill { background: #fff; border: 1px solid var(--line); padding: 8px 16px; border-radius: 999px; font-size: 0.9rem; color: var(--ink); }

/* -------------------- Footer -------------------- */
.site-footer { background: var(--ink); color: rgba(255,255,255,0.75); padding: 60px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 48px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col h4 { color: #fff; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 18px; }
.footer-col p, .footer-col a { color: rgba(255,255,255,0.68); font-size: 0.92rem; display: block; margin-bottom: 10px; }
.footer-col a:hover { color: var(--accent); }
.footer-logo { font-family: var(--font-display); font-weight: 700; color: #fff; font-size: 1.15rem; margin-bottom: 14px; display: block; }
.footer-logo .dot { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12); padding-top: 24px; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: rgba(255,255,255,0.5);
}

/* Mobile call bar */
.mobile-call-bar { display: none; }
@media (max-width: 700px) {
  .mobile-call-bar {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 200;
    background: var(--accent); color: #fff; padding: 14px; justify-content: center; align-items: center; gap: 10px;
    font-family: var(--font-display); font-weight: 700; box-shadow: 0 -4px 20px rgba(0,0,0,0.15);
  }
  body { padding-bottom: 62px; }
}

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }