/* Quant Architect Consulting Ltd — site styles */
:root {
  --navy: #0f1e33;
  --navy-2: #16294a;
  --slate: #33445e;
  --muted: #6b7a90;
  --line: #e3e8ef;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --accent: #1f8a8a;
  --accent-dark: #156b6b;
  --text: #1a2333;
  --radius: 12px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

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

/* Header / nav */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; color: var(--navy); font-size: 1.05rem; letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand .mark {
  width: 34px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--accent) 130%);
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 0.95rem;
}
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--slate); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover { color: var(--accent-dark); text-decoration: none; }
.nav-cta {
  background: var(--navy); color: #fff !important; padding: 9px 18px; border-radius: 8px;
  font-weight: 600; font-size: 0.9rem;
}
.nav-cta:hover { background: var(--navy-2); text-decoration: none; }
.nav-toggle { display: none; }

/* Hero */
.hero {
  background: radial-gradient(1200px 500px at 70% -10%, rgba(31,138,138,0.10), transparent 60%), var(--bg-soft);
  border-bottom: 1px solid var(--line);
  padding: 96px 0 84px;
}
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.3rem); line-height: 1.1; letter-spacing: -0.02em;
  color: var(--navy); margin: 0 0 20px; max-width: 18ch;
}
.hero p.lead { font-size: 1.2rem; color: var(--slate); max-width: 60ch; margin: 0 0 32px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.78rem; font-weight: 700; color: var(--accent-dark); margin: 0 0 16px; }

.btn { display: inline-block; padding: 13px 26px; border-radius: 9px; font-weight: 600; font-size: 1rem; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); text-decoration: none; }
.btn-ghost { color: var(--navy); border: 1px solid var(--line); background: #fff; margin-left: 12px; }
.btn-ghost:hover { border-color: var(--slate); text-decoration: none; }

/* Sections */
section.block { padding: 80px 0; }
section.block.soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 62ch; margin-bottom: 44px; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); color: var(--navy); letter-spacing: -0.01em; margin: 0 0 14px; }
.section-head p { color: var(--slate); font-size: 1.08rem; margin: 0; }

/* Cards grid */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(15,30,51,0.08); }
.card .ico { width: 42px; height: 42px; border-radius: 9px; background: rgba(31,138,138,0.10); color: var(--accent-dark); display: grid; place-items: center; margin-bottom: 16px; font-size: 1.2rem; font-weight: 700; }
.card h3 { margin: 0 0 10px; font-size: 1.15rem; color: var(--navy); }
.card p { margin: 0; color: var(--slate); font-size: 0.98rem; }

/* Prose */
.prose { max-width: 68ch; }
.prose h2 { color: var(--navy); font-size: 1.5rem; margin: 36px 0 14px; }
.prose p { color: var(--slate); font-size: 1.05rem; }
.prose ul { color: var(--slate); padding-left: 1.2em; }
.prose li { margin-bottom: 8px; }

/* CTA band */
.cta-band { background: var(--navy); color: #fff; padding: 64px 0; text-align: center; }
.cta-band h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); margin: 0 0 14px; letter-spacing: -0.01em; }
.cta-band p { color: #b9c6d8; max-width: 54ch; margin: 0 auto 28px; font-size: 1.1rem; }
.cta-band .btn-primary { background: var(--accent); }
.cta-band .btn-primary:hover { background: #24a0a0; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-detail { margin-bottom: 22px; }
.contact-detail .label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); font-weight: 700; margin-bottom: 4px; }
.contact-detail .value { color: var(--navy); font-weight: 500; }
form .field { margin-bottom: 18px; }
form label { display: block; font-weight: 600; font-size: 0.9rem; color: var(--slate); margin-bottom: 6px; }
form input, form textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 9px;
  font: inherit; color: var(--text); background: #fff;
}
form input:focus, form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(31,138,138,0.12); }

/* Footer */
.site-footer { background: var(--navy); color: #aebbcd; padding: 56px 0 32px; font-size: 0.92rem; }
.site-footer a { color: #cdd8e6; }
.footer-top { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; margin-bottom: 32px; }
.footer-brand { max-width: 34ch; }
.footer-brand .brand { color: #fff; margin-bottom: 12px; }
.footer-col h4 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; margin: 0 0 14px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 9px; }
.footer-legal { border-top: 1px solid rgba(255,255,255,0.10); padding-top: 22px; font-size: 0.82rem; color: #8595ab; line-height: 1.7; }

@media (max-width: 860px) {
  .grid, .grid.two, .contact-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero { padding: 64px 0 56px; }
  section.block { padding: 56px 0; }
  .btn-ghost { margin-left: 0; margin-top: 12px; }
}