*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue: #1a3a5c;
  --blue-light: #2a5080;
  --green: #2e7d4f;
  --text: #1a1a1a;
  --muted: #555;
  --border: #ddd;
  --bg: #fff;
  --max: 1000px;
}

html { font-size: 16px; }

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* ── Header ── */
header {
  background: var(--blue);
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo img { height: 36px; }
.logo-text {
  color: #fff;
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: bold;
  letter-spacing: 0.02em;
}

nav a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.82rem;
  margin-left: 1.5rem;
  transition: color 0.2s;
}

nav a:hover, nav a.active { color: #fff; text-decoration: underline; }

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-light) 100%);
  color: #fff;
  padding: 4rem 2rem;
  text-align: center;
}

.hero h1 { font-size: 2rem; margin-bottom: 0.75rem; }
.hero p { font-size: 1rem; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto; }

/* ── Products grid (home) ── */
.products-section {
  background: #f5f7fa;
  padding: 3rem 2rem;
}

.products-section h2 {
  text-align: center;
  color: var(--blue);
  font-size: 1.3rem;
  margin-bottom: 2rem;
}

.products-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.product-card {
  background: #fff;
  border: 1px solid var(--border);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
  display: block;
}

.product-card:hover {
  border-color: var(--blue);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.product-card h3 {
  color: var(--blue);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.product-card p { font-size: 0.85rem; color: var(--muted); }

/* ── Page ── */
.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3rem 2rem;
}

.page h1 {
  color: var(--blue);
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--blue);
}

.page h2 {
  color: var(--blue);
  font-size: 1.2rem;
  margin: 2rem 0 0.75rem;
}

.page p { margin-bottom: 1rem; }

/* ── Contact ── */
.contact-info {
  margin-top: 1.5rem;
  font-size: 1rem;
  line-height: 2.2;
}

.contact-info a { color: var(--blue); }

/* ── Footer ── */
footer {
  background: var(--blue);
  color: rgba(255,255,255,0.6);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
}

/* ── Responsive ── */
@media (max-width: 680px) {
  .products-grid { grid-template-columns: 1fr; }
  nav a { margin-left: 0.75rem; font-size: 0.75rem; }
}