* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
  }

body {
color: #333;
}

/* HEADER */
.header {
position: fixed;
width: 100%;
display: flex;
justify-content: space-between;
align-items: center;
padding: 15px 40px;
background: rgba(255,255,255,0.95);
box-shadow: 0 2px 10px rgba(0,0,0,0.1);
z-index: 100;
}

/* LOGO */
.logo {
display: flex;
align-items: center;
gap: 10px;
}

.logo img {
height: 45px;
}

.logo span {
font-weight: 600;
color: #0a1a2f;
}

/* NAV */
.header nav a {
margin: 0 15px;
color: #333;
text-decoration: none;
font-weight: 500;
}

/* BOTONES */
.btn-primary {
background: #007BFF;
color: white;
border: none;
padding: 10px 20px;
cursor: pointer;
border-radius: 5px;
}

/* HERO */
.hero {
height: 100vh;
position: relative;
}

.hero video {
width: 100%;
height: 100%;
object-fit: cover;
}

.overlay {
position: absolute;
width: 100%;
height: 100%;
background: rgba(0,0,0,0.5);
}

.hero-content {
position: absolute;
top: 40%;
left: 10%;
color: white;
max-width: 500px;
}

.hero h1 {
font-size: 45px;
}

/* SECCIONES */
.section {
padding: 80px 10%;
text-align: center;
}

.dark {
background: #0a1a2f;
color: white;
}

/* GRID */
.grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
gap: 25px;
margin-top: 40px;
}

.card {
background: #f4f4f4;
padding: 30px;
border-radius: 10px;
transition: 0.3s;
}

.card:hover {
transform: translateY(-5px);
}

.dark .card {
background: #162b4d;
}

/* CTA */
.cta {
background: #007BFF;
color: white;
text-align: center;
padding: 60px;
}

/* FOOTER */
footer {
background: #111;
color: white;
text-align: center;
padding: 20px;
}