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

body{
background:#f9f9f9;
color:#333;
}

/* HEADER */
.header{
background:#fff;
text-align:center;
padding:10px;
border-bottom:1px solid #eee;
}

.logo{
height:50px;
}

/* MENU */
.menu{
display:flex;
justify-content:center;
gap:30px;
padding:14px;
background:linear-gradient(90deg,#ffcc00,#ff8c00);
position:sticky;
top:0;
z-index:999;
}

.menu a{
color:#000;
font-weight:600;
text-decoration:none;
}

/* MOBILE */
.menu-toggle{
display:none;
position:fixed;
top:12px;
left:12px;
background:#ff9800;
color:#fff;
padding:8px 12px;
border-radius:6px;
z-index:1001;
}

/* HERO */
.hero{
position:relative;
height:285px;
overflow:hidden;
}

.hero-slides img{
position:absolute;
width:100%;
height:100%;
object-fit:cover;
opacity:0;
transition:1s;
}

.hero-slides img.active{
opacity:1;
}

.hero-content{
position:absolute;
top:50%;
left:50%;
transform:translate(-50%,-50%);
color:#fff;
text-align:center;
background:rgba(0,0,0,0.5);
padding:25px;
border-radius:12px;
}

/* BUTTON */
.btn-main{
background:#ff9800;
color:#fff;
padding:12px 18px;
border-radius:6px;
text-decoration:none;
}

.btn-sub{
background:#fff;
color:#000;
padding:12px 18px;
border-radius:6px;
margin-left:10px;
text-decoration:none;
}

/* TRUST */
.trust{
text-align:center;
padding:25px;
background:#fff;
}

/* SECTION */
.section{
padding:40px 0;
}

.title-center{
text-align:center;
margin-bottom:25px;
font-size:24px;
}

/* GRID */
.grid{
display:grid;
gap:20px;
padding:0 15px;
}

.tours-grid{
grid-template-columns:repeat(4,1fr);
}

/* CARD */
.card{
background:#fff;
border-radius:12px;
overflow:hidden;
box-shadow:0 4px 12px rgba(0,0,0,0.08);
}

.card img{
width:100%;
aspect-ratio:4/3;
object-fit:cover;
}

/* GALLERY */
.gallery-masonry{
column-count:3;
column-gap:12px;
padding:0 15px;
}

.gallery-masonry img{
width:100%;
margin-bottom:12px;
border-radius:10px;
}

/* FOOTER */
footer{
background:#111;
color:#ccc;
text-align:center;
padding:35px;
}

footer a{
color:#ffcc00;
font-weight:bold;
text-decoration:none;
transition:0.3s;
}

footer a:hover{
color:#fff;
text-shadow:0 0 8px #ff9800;
}

/* WHATSAPP (FIX GỌN NHẸ) */
.wa{
position:fixed;
bottom:18px;
right:18px;
width:48px;
height:48px;
background:#25D366;
border-radius:50%;
display:flex;
align-items:center;
justify-content:center;
box-shadow:0 4px 10px rgba(0,0,0,0.25);
z-index:999;
transition:0.3s;
}

.wa img{
width:22px;
height:22px;
filter:invert(1);
}

.wa:hover{
transform:scale(1.08);
}

/* MOBILE */
@media(max-width:768px){

.menu-toggle{display:block;}

.menu{
flex-direction:column;
position:fixed;
top:0;
left:0;
width:100%;
height:100vh;
background:#fff;
transform:translateY(-100%);
transition:0.4s;
padding-top:80px;
}

.menu.show{
transform:translateY(0);
}

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

.gallery-masonry{
column-count:2;
}

.hero{
height:260px;
}

}