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

body{
  background:#f4f6f8;
  color:#1f2937;
}

header{
  position:fixed;
  width:100%;
  top:0;
  left:0;
  z-index:999;
  background:rgba(15,23,42,.85);
  backdrop-filter:blur(8px);

  padding:18px 8%;

  display:flex;
  justify-content:space-between;
  align-items:center;
}

.logo{
  color:#facc15;
  font-size:28px;
  font-weight:bold;
}

nav{
  display:flex;
  gap:18px;
  align-items:center;
}

nav a{
  color:white;
  text-decoration:none;
  font-weight:bold;
}

.correo-btn{
  background:#facc15;
  color:#111827 !important;
  padding:10px 18px;
  border-radius:8px;
}

.hero{
  position:relative;
  height:100vh;

  background-size:cover;
  background-position:center;

  display:flex;
  justify-content:center;
  align-items:center;

  transition:background-image 2s ease-in-out;
}

.overlay{
  position:absolute;
  width:100%;
  height:100%;
  background:rgba(0,0,0,.55);
}

.contenido-hero{
  position:relative;
  z-index:2;
  text-align:center;
  color:white;
  padding:20px;
}

.contenido-hero h1{
  font-size:52px;
  margin-bottom:20px;
}

.contenido-hero p{
  font-size:24px;
  margin-bottom:30px;
}

.hero-buttons{
  display:flex;
  justify-content:center;
  gap:20px;
  flex-wrap:wrap;
}

.btn{
  background:#facc15;
  color:#111827;
  padding:14px 24px;
  border-radius:8px;
  text-decoration:none;
  font-weight:bold;
}

.correo-acceso{
  background:#22c55e;
  color:white;
}

section{
  padding:100px 8%;
}

h2{
  font-size:38px;
  margin-bottom:30px;
  text-align:center;
}

.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:25px;
}

.card{
  background:white;
  padding:30px;
  border-radius:14px;
  box-shadow:0 10px 25px rgba(0,0,0,.08);

  transition:transform .3s;
}

.card:hover{
  transform:translateY(-8px);
}

.panel-correos{
  background:#0f172a;
  color:white;
  padding:40px;
  border-radius:14px;
  text-align:center;
}

.panel-correos p{
  margin-top:10px;
}

.botones-correo{
  margin-top:25px;
}

.panel-btn{
  display:inline-block;
  margin:10px;
  background:#facc15;
  color:#111827;
  padding:14px 22px;
  border-radius:8px;
  text-decoration:none;
  font-weight:bold;
}

footer{
  background:#0f172a;
  color:white;
  text-align:center;
  padding:30px;
}