:root{
--primary:#0ea5e9;
--secondary:#facc15;
--dark:#050816;
--card:#0f172a;
--text:#f8fafc;
}

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

html{
scroll-behavior:smooth;
}

body{
background:var(--dark);
color:white;
overflow-x:hidden;
}

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

.container{
width:90%;
max-width:1300px;
margin:auto;
}

.header{
position:fixed;
top:0;
width:100%;
padding:18px 5%;
display:flex;
justify-content:space-between;
align-items:center;
background:rgba(5,8,22,.85);
backdrop-filter:blur(15px);
z-index:1000;
}

.logo img{
height:60px;
}

nav{
display:flex;
gap:30px;
}

nav a{
color:white;
text-decoration:none;
font-weight:600;
}

.btn-header{
padding:12px 20px;
background:var(--secondary);
color:black;
font-weight:700;
border-radius:50px;
text-decoration:none;
}

.hero{
height:100vh;
background:url('assets/captura-ciudad-1.jpg') center/cover;
display:flex;
align-items:center;
position:relative;
}

.hero-overlay{
position:absolute;
inset:0;
background:linear-gradient(
90deg,
rgba(5,8,22,.95),
rgba(5,8,22,.65)
);
}

.hero-content{
position:relative;
z-index:2;
width:90%;
max-width:1300px;
margin:auto;
}

.badge{
display:inline-block;
background:rgba(255,255,255,.1);
padding:12px 20px;
border-radius:50px;
margin-bottom:20px;
}

.hero h1{
font-size:clamp(3rem,6vw,6rem);
max-width:900px;
margin-bottom:20px;
}

.hero p{
font-size:1.2rem;
max-width:700px;
opacity:.9;
margin-bottom:30px;
}

.hero-buttons{
display:flex;
gap:15px;
flex-wrap:wrap;
}

.btn-primary,
.btn-secondary{
padding:16px 32px;
border-radius:50px;
font-weight:700;
text-decoration:none;
}

.btn-primary{
background:var(--secondary);
color:black;
}

.btn-secondary{
border:2px solid white;
color:white;
}

.section{
padding:120px 0;
}

.dark{
background:#08111f;
}

.title{
text-align:center;
margin-bottom:60px;
}

.title h2{
font-size:3rem;
margin-bottom:10px;
}

.cards{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
gap:30px;
}

.card{
background:var(--card);
padding:40px;
border-radius:24px;
}

.card i{
font-size:2rem;
margin-bottom:20px;
color:var(--secondary);
}

.grid-two{
display:grid;
grid-template-columns:1fr 1fr;
gap:60px;
align-items:center;
}

.cover{
max-width:500px;
margin:auto;
}

.section-tag{
color:var(--secondary);
font-weight:800;
}

.grid-two h2{
font-size:3rem;
margin:15px 0;
}

.grid-two p{
line-height:1.8;
opacity:.9;
}

.list{
margin:25px 0;
padding-left:20px;
}

.list li{
margin-bottom:10px;
}

.download-form{
margin-top:25px;
}

.download-form input{
width:100%;
padding:18px;
border:none;
border-radius:12px;
margin-bottom:15px;
}

.download-form button{
width:100%;
padding:18px;
background:var(--secondary);
border:none;
font-weight:800;
border-radius:12px;
cursor:pointer;
}

.city-grid{
display:grid;
grid-template-columns:repeat(3,1fr);
gap:20px;
}

.city-grid img{
border-radius:20px;
height:320px;
object-fit:cover;
}

.city-text{
text-align:center;
margin-top:50px;
}

.gallery{
columns:3;
column-gap:15px;
}

.gallery img{
margin-bottom:15px;
border-radius:20px;
}

.author-photo{
max-width:450px;
border-radius:30px;
margin:auto;
}

.socials{
display:flex;
gap:20px;
margin-top:25px;
}

.socials a{
font-size:1.8rem;
color:white;
}

footer{
padding:60px 20px;
text-align:center;
border-top:1px solid rgba(255,255,255,.1);
}

footer img{
height:70px;
margin:auto;
margin-bottom:20px;
}

.mobile-btn{
display:none;
font-size:1.8rem;
cursor:pointer;
}

@media(max-width:900px){

nav{
display:none;
}

.mobile-btn{
display:block;
}

.grid-two{
grid-template-columns:1fr;
}

.city-grid{
grid-template-columns:1fr;
}

.gallery{
columns:1;
}

.hero h1{
font-size:3rem;
}

.title h2{
font-size:2rem;
}

}