:root {
  --primary: #009ee3;
  --bg-light: #eaf6fc;
  --text-dark: #333;
  --card-bg: #fff;
  --radius: 12px;
  --shadow: 0 8px 16px rgba(0,0,0,0.1);
}
body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  scroll-behavior: smooth;
}
header {
  background: #fff;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}
nav {
  max-width: 1200px;
  margin: auto;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
nav .logo {
  font-weight: bold;
  color: var(--primary);
  font-size: 20px;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 15px;
  padding: 0;
  margin: 0;
}
nav a {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 500;
  transition: color 0.3s ease;
}
nav a:hover {
  color: var(--primary);
}
.hero {
  text-align: center;
  padding: 80px 20px;
  background: linear-gradient(135deg, #009ee3, #06c0d7);
  color: white;
}
.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}
.hero p {
  font-size: 1.2rem;
  margin-bottom: 20px;
}
.hero .btn {
  background: #27e3b5;
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: bold;
  text-decoration: none;
  display: inline-block;
  transition: background 0.3s ease;
}
.hero .btn:hover {
  background: #20caa2;
}
.info, .faq, .tutoriales, .contacto {
  max-width: 1000px;
  margin: auto;
  padding: 60px 20px;
}
.features {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  margin-top: 30px;
}
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  flex: 1 1 30%;
}
.faq details {
  background: #fff;
  margin-bottom: 10px;
  padding: 15px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.videos {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}
.video-card {
  flex: 1;
  max-width: 560px;
}
.contacto form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}
.contacto input, .contacto textarea {
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid #ccc;
  font-size: 16px;
}
.contacto button {
  background: var(--primary);
  color: white;
  border: none;
  padding: 12px;
  font-size: 16px;
  border-radius: var(--radius);
  cursor: pointer;
}
footer {
  text-align: center;
  padding: 20px;
  background: #f0f0f0;
}
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease-out;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}