:root {
  --color-navy: #1e3a5f;
  --color-teal: #0f766e;
  --color-white: #ffffff;
  --color-off-white: #f8f9fa;
  --color-gray-light: #e2e8f0;
  --color-gray-mid: #64748b;
  --color-gray-dark: #1e293b;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.12);
  --max-width: 1100px;
}

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

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-navy);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  z-index: 9999;
  transition: top 0.2s;
}
.skip-link:focus { top: 1rem; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--color-white);
  color: var(--color-gray-dark);
  line-height: 1.6;
}

/* Focus */
:focus-visible {
  outline: 2px solid var(--color-teal);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Header ──────────────────────────────────────────── */
.site-header {
  background: var(--color-navy);
  color: var(--color-white);
  padding: 0 1.5rem;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
  flex-wrap: wrap;
  padding: 0.75rem 0;
}

.site-logo {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-white);
  text-decoration: none;
  line-height: 1.2;
}
.site-logo span {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 1px;
}

/* ── Nav ─────────────────────────────────────────────── */
.site-nav {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
}
.site-nav a:hover { color: var(--color-white); background: rgba(255, 255, 255, 0.1); }

/* ── Hero ────────────────────────────────────────────── */
.hero {
  background: var(--color-off-white);
  border-bottom: 1px solid var(--color-gray-light);
  padding: 4rem 1.5rem;
  text-align: center;
}

.hero-inner {
  max-width: 680px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.0625rem;
  color: var(--color-gray-mid);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Sections ────────────────────────────────────────── */
.section {
  padding: 4rem 1.5rem;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.375rem;
}

.section-sub {
  color: var(--color-gray-mid);
  font-size: 0.9375rem;
  margin-bottom: 2.5rem;
}

.section--alt { background: var(--color-off-white); border-top: 1px solid var(--color-gray-light); border-bottom: 1px solid var(--color-gray-light); }

/* ── Product Grid ────────────────────────────────────── */
.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── Product Card ────────────────────────────────────── */
.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.product-card-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(15, 118, 110, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  flex-shrink: 0;
}

.product-card-icon svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-teal);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.product-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.product-card p {
  font-size: 0.875rem;
  color: var(--color-gray-mid);
  line-height: 1.55;
  flex: 1;
  margin-bottom: 1.25rem;
}

.product-link {
  align-self: flex-start;
  color: var(--color-teal);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap 0.15s;
}
.product-link:hover { gap: 0.55rem; }
.product-link::after { content: "→"; }

/* ── About ───────────────────────────────────────────── */
.about-body {
  max-width: 680px;
  color: var(--color-gray-mid);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.about-body p + p { margin-top: 1rem; }

/* ── Contact ─────────────────────────────────────────── */
.contact-block {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-block a {
  color: var(--color-teal);
  text-decoration: none;
  font-weight: 500;
}
.contact-block a:hover { text-decoration: underline; }

/* ── Footer ──────────────────────────────────────────── */
.site-footer {
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8125rem;
}