*{
    box-sizing:border-box;
}

body{
    margin:0;
    padding:0;
    background:#f8fafc;
    color:#0f172a;
    font-family:Segoe UI,Arial,sans-serif;
}

.header{
    background:#2563eb;
    color:white;
    padding:30px;
    text-align:center;
}

.header h1{
    margin:0;
    font-size:42px;
}

.header p{
    margin-top:10px;
    opacity:.9;
}

.nav{
    background:#0f172a;
    padding:15px;
    text-align:center;
}

.nav a{
    color:white;
    text-decoration:none;
    margin:0 12px;
    font-weight:600;
}

.container{
    max-width:1600px;
    margin:auto;
    padding:25px;
}

.grid{
    display:grid;
    grid-template-columns:
        repeat(auto-fit,minmax(250px,1fr));
    gap:20px;
}

.card{
    background:#ffffff;
    border-radius:16px;
    padding:25px;
    box-shadow:
        0 2px 12px rgba(0,0,0,.08);
}

.card-title{
    color:#64748b;
    font-size:14px;
    text-transform:uppercase;
    letter-spacing:1px;
}

.card-value{
    margin-top:10px;
    font-size:42px;
    font-weight:700;
}

.table{
    width:100%;
    border-collapse:collapse;
}

.table th{
    background:#f1f5f9;
    padding:14px;
    text-align:left;
}

.table td{
    padding:14px;
    border-bottom:1px solid #e2e8f0;
}

.footer{
    text-align:center;
    padding:30px;
    color:#64748b;
}

.forecast-grid{
    display:grid;
    grid-template-columns:
        repeat(auto-fit,minmax(220px,1fr));
    gap:20px;
}

.forecast-card{
    background:#ffffff;
    border-radius:16px;
    padding:20px;
    text-align:center;
    box-shadow:
        0 2px 10px rgba(0,0,0,.08);
}

.forecast-day{
    font-size:20px;
    font-weight:700;
}

.forecast-temp{
    font-size:30px;
    margin-top:10px;
}

@media(max-width:768px){

    .header h1{
        font-size:28px;
    }

    .card-value{
        font-size:28px;
    }

}