:root {
  --bg: #f7f9f5;
  --surface: #ffffff;
  --text: #122618;
  --muted: #4d5f52;
  --brand: #2e6d3e;
  --brand-dark: #1f4d2b;
  --border: #d8e2d6;
  --shadow: 0 12px 30px rgba(18, 38, 24, 0.08);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(circle at top left, #eef6ea 0%, #f7f9f5 42%, #f7f9f5 100%);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: inherit;
}

.site-wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.brand-title {
  margin: 0;
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  letter-spacing: 0.3px;
}

.top-nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.top-nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
}

.hero,
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero {
  padding: 28px;
  margin-bottom: 28px;
}

.hero h2 {
  margin: 0 0 8px;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 8px;
}

.card p {
  margin: 0 0 14px;
  color: var(--muted);
}

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  background: var(--brand);
  color: #ffffff;
  border: none;
  border-radius: 10px;
  padding: 11px 16px;
  transition: background 0.2s ease;
}

.btn:hover {
  background: var(--brand-dark);
}

.product-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 24px;
}

.panel {
  padding: 22px;
}

.panel h3 {
  margin-top: 0;
}

.product-copy {
  color: var(--muted);
}

.product-image {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #f0f5ef;
}

.download-box {
  margin: 18px 0 0;
}

.footer-note {
  margin-top: 32px;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 860px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .product-layout {
    grid-template-columns: 1fr;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }
}