body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f6f7fb;
    color: #24212b;
}

.btn {
    display: inline-block;
    background: #391987;
    color: #fff !important;
    padding: 7px 19px;
    border-radius: 8px;
    text-decoration: none;
    margin-right: 9px;
    font-size: 1em;
    transition: background 0.15s;
}
.btn:hover {
    background: #6349b7;
}


#wrapper {
    display: flex;
    min-height: 100vh;
}
#sidebar {
    width: 220px;
    background: #391987;
    color: #fff;
    padding: 40px 20px 20px 20px;
    box-shadow: 2px 0 12px #bbb2;
}
#sidebar h2 {
    font-size: 1.3em;
    color: #e4e0ff;
    margin-bottom: 0.7em;
}
#sidebar a {
    color: #fff;
    text-decoration: none;
    display: block;
    padding: 9px 0 9px 6px;
    margin: 2px 0;
    border-radius: 7px;
    transition: background 0.15s;
}
#sidebar a:hover {
    background: #6349b7;
}
#main {
    flex: 1;
    padding: 40px 50px;
    background: #fff;
    min-height: 100vh;
}
.header {
    background: #282056;
    color: #fff;
    padding: 18px 0 18px 0;
    text-align: left;
    font-size: 1.5em;
    letter-spacing: 1.5px;
    box-shadow: 0 4px 24px #bbb1;
}
.header span {
    font-weight: 600;
    margin-left: 40px;
}
@media (max-width: 700px) {
    #wrapper { flex-direction: column; }
    #sidebar { width: 100%; box-shadow: none; }
    #main { padding: 16px 7vw; }
}
.article-title {
    font-size: 2em;
    color: #391987;
    font-weight: 700;
    margin-bottom: 0.4em;
}
.article-content {
    line-height: 1.7;
    font-size: 1.13em;
    margin-bottom: 40px;
}
.article-meta {
    color: #888;
    font-size: 0.93em;
    margin-bottom: 24px;
}