:root {
  --primary: #b45309; /* Copper */
  --secondary: #1e293b; /* Deep Navy */
  --accent: #d97706; /* Bright Copper */
  --background: #f8fafc;
  --surface: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --font-heading: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.6;
  background-color: var(--background);
}
h1,h2,h3{margin:0;font-family:var(--font-heading);line-height:1.1; font-weight: 800; letter-spacing: -0.03em;}
h1{font-size:clamp(2.45rem,6.2vw,4.6rem); color: var(--secondary);}
h2{font-size:clamp(2rem,6vw,3.5rem);margin-bottom:1.5rem; color: var(--secondary);}
h3{font-size:1.6rem;margin-bottom:.5rem; color: var(--secondary);}
p{margin-top:0;}
a{color:inherit; text-decoration: none;}

.container{width:100%;max-width:1100px;margin-inline:auto;padding-inline:24px}
.section{padding-block:clamp(4rem,10vw,8rem)}

.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 40px;
  transition: all 0.3s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.6rem;
  font-weight:700;
  border-radius:4px;
  padding:1rem 2.5rem;
  transition: 0.3s;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.btn-primary{
  background: var(--secondary);
  color:#fff;
}
.btn-primary:hover {
  background: var(--primary);
  transform: translateY(-1px);
}
.btn-secondary{
  background: white;
  color: var(--secondary);
  border: 2px solid var(--secondary);
}

.site-header{
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  z-index: 100;
  border-bottom: 2px solid var(--secondary);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;min-height:90px}
.site-logo{font-family:var(--font-heading);font-weight:800;font-size:1.4rem; color: var(--secondary); display: flex; align-items: center; gap: 8px;}

.nav-toggle{
  display: none;
  border: none;
  background: transparent;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  transition: background-color .2s;
}

.nav-toggle-bar{
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: var(--ink);
  transition: transform .2s, opacity .2s;
}

.nav-menu{display:flex;gap:32px; align-items: center;}
.nav-menu a{font-weight:700;color:var(--muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px;}
.nav-menu a:not(.btn):not(.nav-cta):hover{color:var(--secondary)}
.site-header .nav-menu .btn-primary,
.site-header .nav-menu .btn-primary:hover{
  color:#fff;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.15;
}

.grid-3{display:grid;gap:24px;grid-template-columns:repeat(3,minmax(0,1fr))}

@media (max-width:900px){
  .grid-3{grid-template-columns:1fr}
  .site-header .container{position: relative;}
  .nav-toggle{
    display: inline-flex;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: 8px 24px 18px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  }
  .nav-menu.is-open{
    display: flex;
  }
  .nav-menu a{
    width: 100%;
    padding: 14px 2px;
    border-top: 1px solid rgba(226, 232, 240, 0.7);
  }
  .site-header .nav-menu .btn-primary{
    width: auto;
    margin-top: 8px;
  }
  .site-header.menu-open .nav-toggle-bar:nth-child(1){
    transform: translateY(7px) rotate(45deg);
  }
  .site-header.menu-open .nav-toggle-bar:nth-child(2){
    opacity: 0;
  }
  .site-header.menu-open .nav-toggle-bar:nth-child(3){
    transform: translateY(-7px) rotate(-45deg);
  }
}