* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji"; color: #0f172a; background: #ffffff; }

:root {
  --brand: #0ea5e9;
  --brand-dark: #0284c7;
  --text: #0f172a;
  --muted: #475569;
  --bg: #ffffff;
  --surface: #f8fafc;
  --border: #e2e8f0;
}

/* Layout */
nav { position: sticky; top: 0; z-index: 50; background: var(--bg); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1100px; margin: 0 auto; padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; }
.logo { font-weight: 700; font-size: 20px; letter-spacing: 0.4px; color: var(--text); }
.nav-links { list-style: none; display: flex; gap: 20px; margin: 0; padding: 0; }
.nav-links a { text-decoration: none; color: var(--text); padding: 8px 10px; border-radius: 6px; }
.nav-links a:hover { background: var(--surface); }
.burger { display: none; width: 28px; height: 22px; cursor: pointer; justify-content: center; flex-direction: column; gap: 5px; }
.burger div { height: 2px; background: var(--text); border-radius: 2px; }

/* Mobile nav */
@media (max-width: 860px) {
  .nav-links { position: fixed; inset: 60px 0 auto 0; background: var(--bg); border-bottom: 1px solid var(--border); flex-direction: column; gap: 0; padding: 10px 16px; transform: translateY(-120%); transition: transform .25s ease; }
  .nav-links li { border-top: 1px solid var(--border); }
  .nav-links a { display: block; padding: 14px; }
  .burger { display: flex; }
  .nav-active { transform: translateY(0); }
}

/* Hero */
.hero { max-width: 1100px; margin: 0 auto; padding: 40px 20px; display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: center; gap: 24px; }
.hero-text h1 { margin: 0 0 12px; font-size: 42px; line-height: 1.1; }
.hero-text p { margin: 0 0 18px; color: var(--muted); font-size: 18px; }
.btn { display: inline-block; background: var(--brand); color: white; text-decoration: none; padding: 12px 16px; border-radius: 8px; font-weight: 600; }
.btn:hover { background: var(--brand-dark); }
.hero-img { width: 100%; border-radius: 12px; box-shadow: 0 8px 24px rgba(2, 132, 199, 0.15); }
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 24px; }
}

/* Products */
.products { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 32px 20px; }
.products > h2 { max-width: 1100px; margin: 0 auto 18px; font-size: 26px; }
.product-grid { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.product-card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 16px; box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06); }
.product-card img { width: 100%; height: 160px; object-fit: cover; border-radius: 8px; margin-bottom: 12px; }
.product-card h3 { margin: 0 0 6px; font-size: 18px; }
.product-card p, .product-card li { color: var(--muted); }
.products .btn { display: block; width: fit-content; margin: 18px auto 0; }
@media (max-width: 860px) {
  .product-grid { grid-template-columns: 1fr; }
}

/* Features */
.features { padding: 32px 20px; }
.features > h2 { max-width: 1100px; margin: 0 auto 18px; font-size: 26px; }
.feature-grid { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 16px; box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06); display: grid; grid-template-columns: 48px 1fr; gap: 14px; align-items: start; }
.icon { font-size: 40px; line-height: 1; color: var(--brand); }
.feature-card h3 { margin: 0 0 6px; font-size: 18px; }
.feature-card p { margin: 0; color: var(--muted); }
@media (max-width: 860px) {
  .feature-grid { grid-template-columns: 1fr; }
}

/* List icons */
.with-icons li { display: flex; align-items: start; gap: 10px; }
.list-icon { font-size: 18px; line-height: 1; color: var(--brand); flex: 0 0 auto; margin-top: 3px; }

/* About */
.about { max-width: 900px; margin: 0 auto; padding: 32px 20px; }
.about h2 { font-size: 26px; margin: 0 0 8px; }
.about p { color: var(--muted); margin: 0 0 12px; }
.about-img { width: 100%; max-width: 520px; border-radius: 12px; box-shadow: 0 6px 20px rgba(2, 132, 199, 0.15); }

/* Contact */
.contact { max-width: 700px; margin: 0 auto; padding: 32px 20px; }
.contact h2 { font-size: 26px; margin: 0 0 12px; }
.contact .lead { color: var(--muted); margin: 0 0 16px; }
.contact-grid { max-width: 1100px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 20px; }
.card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 16px; box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06); }
.info-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.info-list li { display: flex; align-items: center; gap: 10px; color: var(--muted); }
.info-list i { color: var(--brand); font-size: 20px; }
.contact form { display: grid; gap: 12px; }
.contact label { font-weight: 600; font-size: 14px; }
.contact input, .contact textarea { padding: 12px; border: 1px solid var(--border); border-radius: 8px; font: inherit; }
.contact textarea { min-height: 120px; resize: vertical; }
.contact button { background: var(--brand); color: #fff; border: none; padding: 12px 16px; border-radius: 8px; font-weight: 600; cursor: pointer; }
.contact button:hover { background: var(--brand-dark); }
@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* Footer */
footer { background: #0b1220; color: #cbd5e1; margin-top: 24px; }
.footer-content { max-width: 1100px; margin: 0 auto; padding: 20px; display: grid; gap: 4px; }