```css
@charset "utf-8";

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

body {
    background: #0b1021;
    color: #e2e8f0;
    font-family: Arial, "Malgun Gothic", sans-serif;
    line-height: 1.75;
}

a {
    color: #93c5fd;
    text-decoration: none;
}

a:hover {
    color: #ffffff;
}

#wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 상단 카테고리 */
#category-nav {
    margin-bottom: 22px;
    padding: 22px 24px;
    border: 1px solid rgba(148, 163, 184, .2);
    border-radius: 18px;
    background: linear-gradient(135deg, #141f37, #0c1224);
    box-shadow: 0 12px 32px rgba(0, 0, 0, .16);
}

.category-heading {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    color: #f8fafc;
    font-size: 18px;
    font-weight: bold;
}

.category-star {
    color: #fcd34d;
    font-size: 22px;
}

.category-heading small {
    margin-left: auto;
    color: #94a3b8;
    font-size: 12px;
    font-weight: normal;
}

.category-content,
#category-nav .tt_category {
    width: 100%;
}

#category-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

#category-nav .category_list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

#category-nav .category_list > li {
    position: relative;
    list-style: none;
}

#category-nav .link_item {
    display: block;
    padding: 9px 15px;
    border: 1px solid rgba(148, 163, 184, .18);
    border-radius: 999px;
    background: rgba(30, 41, 59, .72);
    color: #dbeafe;
    font-size: 14px;
}

#category-nav .link_item:hover {
    background: #263957;
    border-color: #60a5fa;
    color: #ffffff;
}

#category-nav .c_cnt {
    margin-left: 5px;
    color: #94a3b8;
    font-size: 12px;
}

/* 하위 카테고리 */
#category-nav .sub_category_list {
    display: none;
    position: absolute;
    z-index: 50;
    top: 100%;
    left: 0;
    min-width: 190px;
    padding: 7px !important;
    border: 1px solid rgba(148, 163, 184, .22);
    border-radius: 12px;
    background: #141e33;
    box-shadow: 0 12px 28px rgba(0, 0, 0, .35);
}

#category-nav .category_list > li:hover > .sub_category_list,
#category-nav .category_list > li:focus-within > .sub_category_list {
    display: block;
}

#category-nav .link_sub_item {
    display: block;
    padding: 8px 10px;
    color: #cbd5e1;
    font-size: 13px;
}

#category-nav .link_sub_item:hover {
    color: #ffffff;
    background: rgba(96, 165, 250, .13);
}

/* 본문과 사이드바 */
#container {
    display: flex;
    align-items: flex-start;
    gap: 22px;
    width: 100%;
}

#content {
    order: 1;
    flex: 1 1 0;
    min-width: 0;
}

#sidebar {
    order: 2;
    flex: 0 0 260px;
    width: 260px;
    min-width: 0;
}

/* 게시글 */
.entry {
    width: 100%;
    margin-bottom: 22px;
    padding: 26px;
    border: 1px solid rgba(148, 163, 184, .16);
    border-radius: 16px;
    background: rgba(20, 29, 49, .96);
    color: #e2e8f0;
}

.entry h2 {
    margin-bottom: 18px;
    font-size: 25px;
    line-height: 1.5;
}

.entry h2,
.entry h2 a {
    color: #f8fafc !important;
}

/* 본문 글씨 */
.article {
    color: #e2e8f0;
    font-size: 16px;
    line-height: 1.9;
    overflow-wrap: anywhere;
}

.article p,
.article div,
.article span,
.article li,
.article strong,
.article b,
.article em,
.article blockquote,
.article td,
.article th,
.article figcaption {
    color: #e2e8f0 !important;
}

.article p {
    margin-bottom: 1em;
    line-height: 1.9;
}

.article h1,
.article h2,
.article h3,
.article h4,
.article h5,
.article h6 {
    margin: 1.4em 0 .6em;
    color: #f8fafc !important;
    line-height: 1.6;
}

.article a,
.article a:visited {
    color: #93c5fd !important;
    text-decoration: underline;
}

.article img,
.article video,
.article iframe {
    max-width: 100%;
    height: auto;
}

.article table {
    max-width: 100%;
    border-collapse: collapse;
    margin: 1em 0;
}

.article th,
.article td {
    padding: 8px;
    border: 1px solid #475569;
}

.article pre,
.article code {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

/* 어반스티치 위젯 */
.urbanstitch-widget {
    display: block;
    width: 100%;
    margin-bottom: 20px;
    padding: 18px;
    border: 1px solid rgba(148, 163, 184, .2);
    border-radius: 16px;
    background: #141e33;
}

.urbanstitch-widget h3 {
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(148, 163, 184, .2);
    color: #ffffff;
    font-size: 16px;
}

.urbanstitch-widget a {
    display: block;
}

.urbanstitch-image-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 150px;
    background: #ffffff;
    color: #475569;
    text-align: center;
}

.urbanstitch-caption {
    display: block;
    padding: 12px;
    background: #ffffff;
    color: #172033;
    text-align: center;
    font-weight: bold;
}

/* 관리자 메뉴 */
.admin-box {
    padding: 18px;
    border: 1px solid rgba(148, 163, 184, .18);
    border-radius: 14px;
    background: #141e33;
    text-align: center;
}

.admin-title {
    margin-bottom: 12px;
    color: #93c5fd;
    font-size: 13px;
    font-weight: bold;
}

.admin-box a {
    display: inline-block;
    margin: 3px;
    padding: 6px 9px;
    border-radius: 7px;
    background: #263957;
    color: #ffffff;
    font-size: 12px;
}

/* 모바일 */
@media screen and (max-width: 768px) {
    #wrapper {
        padding: 12px;
    }

    #category-nav {
        padding: 17px 14px;
        margin-bottom: 16px;
    }

    .category-heading {
        font-size: 16px;
        flex-wrap: wrap;
    }

    #category-nav .category_list {
        gap: 6px;
    }

    #category-nav .link_item {
        padding: 8px 11px;
        font-size: 13px;
    }

    #container {
        flex-direction: column;
        gap: 16px;
    }

    #content {
        order: 2;
        width: 100%;
    }

    #sidebar {
        display: block !important;
        order: 1;
        flex: 0 0 auto;
        width: 100%;
    }

    .urbanstitch-widget {
        display: block !important;
        width: 100%;
        margin-bottom: 16px;
    }

    .entry {
        padding: 17px;
    }

    .entry h2 {
        font-size: 21px;
    }

    .article {
        font-size: 15px;
        line-height: 1.85;
    }

    .article table {
        display: block;
        overflow-x: auto;
    }
}
```