*{
margin: 0;
padding: 0;
box-sizing: border-box;
}

img{
display: block;
max-width: 100%;
height: 4rem;
}

body{
font-family: "Times New Roman";
line-height: 1.4;
background-color: aquamarine;
color: #000;
}

.header img{
width: 100%;
height: 550px;
object-fit: cover;
}

.nav{
display: flex;
justify-content: center;
align-items: center;
gap: 25px;
padding: 14px 10px;
background: #0e6b57;
flex-wrap: wrap;
border: 2px solid #000;
}

.nav a{
text-decoration: none;
color: #fff;
font-weight: 700;
text-transform: uppercase;
padding: 10px 14px;
border-radius: 10px;
background: rgba(255,255,255,0.12);
transition: background 160ms ease, transform 160ms ease;
}

.nav a:hover{
background: rgba(255,255,255,0.22);
transform: translateY(-1px);
}

main{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
  max-width: 1400px;
  margin: auto;
}

.bloqueC,
.bloqueD{
  background: #161a22;
  border-radius: 14px;
  padding: 1.5rem;
  box-shadow: 0 10px 25px rgba(0,0,0,.4);
  transition: transform .25s ease, box-shadow .25s ease;
}

.bloqueC:hover,
.bloqueD:hover{
  transform: translateY(-6px);
  box-shadow: 0 15px 40px rgba(0,0,0,.6);
}

.bloqueC h2,
.bloqueD h2{
  margin-bottom: .8rem;
  font-size: 1.4rem;
  color: #ffffff;
}

.bloqueB,
.bloqueD{
  font-size: 1rem;
  line-height: 1.6;
  color: #cfd3ff;
  text-align: center;
}

.bloqueC{
  grid-column: span 2;
  min-height: 20rem;
}

button{
  margin-top: 1rem;
  padding: .7rem 1.5rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, #5f7cff, #9f7bff);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease;
}

button:hover{
transform: scale(1.05);
box-shadow: 0 8px 25px rgba(95,124,255,.5);
}


.XD{
  max-width: 400px;
  margin: 2rem auto;
  padding: 1.5rem;
  background: #121212;
  border-radius: 8px;
}

.XD form{
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.XD label{
  font-size: .85rem;
  color: #bdbdbd;
}

.XD input{
  padding: .6rem .7rem;
  font-size: .9rem;
  border-radius: 6px;
  border: 1px solid #2a2a2a;
  background: #0e0e0e;
  color: #eaeaea;
}

.XD input::placeholder{
  color: #6f6f6f;
}

.XD input:focus{
  outline: none;
  border-color: #ffffff;
}

.XD button{
  margin-top: .8rem;
  padding: .6rem;
  font-size: .9rem;
  background: #ffffff;
  color: #000;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.XD button:hover{
  background: #eaeaea;
}

/* parte de abajo footer */

.footer{
margin-top: 40px;
padding: 18px 10px;
text-align: center;
background: #111;
color: #fff;
}