:root {
  --brown: #4a2c1a;
  --cream: #faf5ee;
  --accent: #c8702a;
  --text: #2b2b2b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--cream);
  line-height: 1.6;
}
header {
  background: var(--brown);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav-wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { font-weight: 700; font-size: 1.2rem; color: #fff; text-decoration: none; }
nav ul { list-style: none; display: flex; gap: 1.25rem; margin: 0; padding: 0; }
nav a { color: #f3e6d8; text-decoration: none; padding: 0.25rem 0; }
nav a:hover, nav a.active { color: #fff; border-bottom: 2px solid var(--accent); }
#menu-toggle {
  display: none;
  background: none;
  border: 1px solid #f3e6d8;
  color: #fff;
  font-size: 1.2rem;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
}
main { max-width: 1000px; margin: 0 auto; padding: 2rem 1rem; }
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}
.hero img, .card img { width: 100%; height: auto; border-radius: 8px; display: block; }
h1, h2, h3 { color: var(--brown); line-height: 1.2; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}
.btn:hover { background: #a85a1e; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.card {
  background: #fff;
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}
.calc {
  background: #fff;
  padding: 1.25rem;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  max-width: 480px;
}
.calc label { display: block; margin: 0.75rem 0 0.25rem; font-weight: 600; }
.calc input, .calc select, form input, form textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font: inherit;
}
#calc-result { margin-top: 1rem; font-weight: 700; color: var(--brown); }
footer {
  background: var(--brown);
  color: #f3e6d8;
  text-align: center;
  padding: 1.25rem 1rem;
  margin-top: 2rem;
}
@media (max-width: 700px) {
  .hero { grid-template-columns: 1fr; }
  #menu-toggle { display: block; }
  nav ul {
    display: none;
    flex-direction: column;
    gap: 0.5rem;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--brown);
    padding: 1rem;
  }
  nav ul.open { display: flex; }
}