:root {
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --dark: #0f172a;
  --gray-text: #475569;
  --bg-light: #f8fafc;
  --white: #ffffff;
  --border: #e2e8f0;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  color: var(--dark);
  line-height: 1.6;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--gray-text);
  font-weight: 500;
}

.btn-nav {
  background: var(--primary);
  color: var(--white) !important;
  padding: 0.5rem 1rem;
  border-radius: 6px;
}

/* Hero */
.hero {
  background: linear-gradient(rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.85)), url('https://images.unsplash.com/photo-1586528116311-ad8dd3c8310d?auto=format&fit=crop&w=1200&q=80') center/cover;
  color: var(--white);
  padding: 5rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  max-width: 650px;
  margin: 0 auto 2rem auto;
  color: #cbd5e1;
}

.btn-primary {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  padding: 0.8rem 1.8rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

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

/* Secciones */
.section {
  padding: 4.5rem 0;
}

.section-title {
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 1rem;
}

.section-desc {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  color: var(--gray-text);
}

.bg-light {
  background-color: var(--bg-light);
}

/* Tarjetas */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
}

.card h3 {
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.card p {
  color: var(--gray-text);
  font-size: 0.95rem;
}

/* Formulario */
.contact-form {
  max-width: 500px;
  margin: 2rem auto 0 auto;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
}

.full-width {
  width: 100%;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.9rem;
  color: var(--gray-text);
}