* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Verdana, Arial, sans-serif;
    background: #f0f2f5;
    color: #1c1e21;
    font-size: 15px;
}

a {
    color: #1877f2;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.topbar {
    background: #ffffff;
    border-bottom: 1px solid #dddfe2;
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-inner {
    max-width: 100%;
    margin: 0 auto;
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: bold;
    color: #1877f2;
    font-size: 20px;
}

.brand img {
    width: 42px;
    height: 42px;
    border-radius: 50%;
}

.main-menu ul {
    display: flex;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-menu a {
    display: block;
    padding: 10px 14px;
    border-radius: 8px;
    color: #444;
    font-weight: bold;
}

.main-menu a:hover,
.main-menu .current a,
.main-menu .active a {
    background: #e7f3ff;
    color: #1877f2;
    text-decoration: none;
}

.cover {
    max-width: 1180px;
    margin: 18px auto 0 auto;
    padding: 0 16px;
}

.cover-inner {
    min-height: 220px;
    border-radius: 12px;
    background: linear-gradient(135deg, #dbeafe, #ffffff);
    border: 1px solid #dddfe2;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 28px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}

.cover h1 {
    margin: 0;
    font-size: 34px;
    color: #1c1e21;
}

.cover p {
    margin: 8px 0 0 0;
    font-size: 17px;
    color: #65676b;
}

.page-wrap {
    max-width: 1180px;
    margin: 18px auto;
    padding: 0 16px;
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr) 280px;
    gap: 18px;
}

.left-column,
.right-column,
.post-card,
.feed .moduletable {
    background: #ffffff;
    border: 1px solid #dddfe2;
    border-radius: 10px;
    padding: 16px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}

.left-column,
.right-column {
    height: fit-content;
    position: sticky;
    top: 82px;
}

.feed {
    min-width: 0;
}

.feed .moduletable {
    margin-bottom: 16px;
}

.post-card {
    margin-bottom: 16px;
}

h1, h2, h3 {
    color: #1c1e21;
}

.content-category,
.item-page,
.blog,
.com-content-article {
    line-height: 1.6;
}

button,
.btn,
input[type="submit"] {
    background: #1877f2;
    color: #fff;
    border: none;
    padding: 10px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
}

input,
textarea,
select {
    border: 1px solid #ccd0d5;
    border-radius: 8px;
    padding: 10px;
    max-width: 100%;
}

.footer {
    text-align: center;
    color: #65676b;
    padding: 30px 16px;
}

@media (max-width: 1000px) {
    .page-wrap {
        grid-template-columns: 1fr 280px;
    }

    .left-column {
        display: none;
    }
}

@media (max-width: 760px) {
    .topbar-inner {
        height: auto;
        padding: 12px;
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }

    .main-menu ul {
        flex-wrap: wrap;
    }

    .page-wrap {
        grid-template-columns: 1fr;
    }

    .right-column {
        position: static;
    }

    .cover-inner {
        min-height: 170px;
        padding: 20px;
    }

    .cover h1 {
        font-size: 26px;
    }
}