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

body{
    background:#0f172a;
    color:white;
    font-family:Arial, Helvetica, sans-serif;
}

.top-banner{
    padding:60px 40px;
    background:linear-gradient(135deg,#0f172a,#111827,#1e293b);
}

.content{
    max-width:1500px;
    margin:auto;
    display:grid;
    grid-template-columns:1.1fr 1fr;
    gap:40px;
    align-items:center;
}

.right img{
    width:100%;
    height:520px;
    object-fit:cover;
    border-radius:28px;
    box-shadow:0 15px 35px rgba(0,0,0,0.4);
}

.tag{
    display:inline-block;
    background:#374151;
    color:#e5e7eb;
    padding:10px 18px;
    border-radius:999px;
    margin-bottom:22px;
    font-weight:bold;
}

h1{
    font-size:68px;
    line-height:1.1;
    margin-bottom:18px;
}

.subtitle{
    font-size:28px;
    color:#cbd5e1;
    margin-bottom:25px;
}

.price{
    display:inline-block;
    background:#facc15;
    color:#111;
    padding:14px 24px;
    border-radius:14px;
    font-size:32px;
    font-weight:bold;
    margin-bottom:22px;
}

.contact{
    font-size:24px;
    margin-bottom:28px;
}

.contact a{
    color:#60a5fa;
    text-decoration:none;
    font-weight:bold;
}

.button{
    display:inline-block;
    background:white;
    color:#111827;
    text-decoration:none;
    padding:16px 28px;
    border-radius:14px;
    font-size:20px;
    font-weight:bold;
}

.container{
    max-width:1450px;
    margin:auto;
    padding:50px 30px 70px;
}

.details-card{
    background:#111827;
    border:1px solid #1f2937;
    border-radius:30px;
    padding:40px;
    margin-bottom:50px;
}

.details-card h2{
    font-size:42px;
    margin-bottom:20px;
}

.details-card p{
    font-size:23px;
    line-height:1.8;
    color:#d1d5db;
    margin-bottom:35px;
}

.features{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
    gap:18px;
}

.feature{
    background:#1f2937;
    padding:20px;
    border-radius:16px;
    font-size:20px;
    font-weight:bold;
}

.gallery-title{
    font-size:44px;
    margin-bottom:28px;
}

.gallery{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:22px;
}

.gallery img{
    width:100%;
    height:100%;
    object-fit:cover;
    border-radius:24px;
    box-shadow:0 12px 30px rgba(0,0,0,0.35);
}

.large{
    grid-row:span 2;
    height:850px;
}

.wide{
    grid-column:span 2;
    height:450px;
}

@media(max-width:900px){

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

    h1{
        font-size:42px;
    }

    .subtitle,
    .contact{
        font-size:18px;
    }

    .price{
        font-size:24px;
    }

    .details-card h2,
    .gallery-title{
        font-size:30px;
    }

    .details-card p,
    .feature{
        font-size:18px;
    }

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

    .large,
    .wide{
        grid-column:auto;
        grid-row:auto;
        height:auto;
    }

    .gallery img{
        height:300px;
    }

    .right img{
        height:320px;
    }
}