*{
    box-sizing:border-box;
}

body{
    background-color:#fcfcfc;
    color:#334155;
    font-family: Arial, sans-serif;
    line-height: 1.8;
    font-size:16px;
    margin:0;
}

h1{
    color:#2563eb;
    font-size:2rem;
}

h2{
    color:#1e293b;
    font-size:1.5rem;
}

a{
    color:#2563eb;
    text-decoration:none;
}

a:hover{
    text-decoration:underline;
}

p{
    font-size:1rem;
}

#first-article {
    color: #333333;
}

header,main,footer{
    width:90%;
    max-width: 1000px;
    margin: 0 auto;
}

header{
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    padding: 16px 0;
    border-bottom:1px solid #e2e8f0;
}

nav{
    display: flex;
    gap: 20px;
}


.post {

    max-width:800px;
    background-color: #eef4ff;
    padding: 20px;
    margin: 30px auto;

    border: 1px solid #dbeafe;
    border-radius: 12px;
    box-shadow:0 4px 12px rgba(0,0,0,0.08);
}





.article-grid{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.article-grid .post{
    margin:0;
}

@media (max-width: 600px){
    .article-grid{
        grid-template-columns: 1fr;
    }
}

.post img{
    max-width:100%;
    height:auto;
}

.table-scroll{
    max-width:100%;
    overflow-x:auto;
}

.post table{
    width:100%;
    min-width:480px;
    border-collapse:collapse;
}

.post th,
.post td{
    border:1px solid #cbd5e1;
    padding: 10px;
    text-align:left;
}

.post th{
    background-color:#e2e8f0;
}

footer{
    margin-top: 40px;
    padding:20px 0;
    border-top: 1px solid #e2e8f0;
    text-align:center;
    color:#64748b;
}

.search-form{
    display:flex;
    flex-direction:column;
    gap:10px;
    max-width:420px;
}

.search-form input{
    width:100%;
    padding:10px;
    border: 1px solid #cbd5e1;
    border-radius:6px;
}

.search-from button{
    align-self:flex-start;
    padding:8px 18px;
}