:root {
    --bg-color: #0f111a;
    --sidebar-bg: #161925;
    --card-bg: #1c2033;
    --text-color: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.45);
    --border-color: rgba(255, 255, 255, 0.05);
    --hover-color: #5c7cff;
    --accent-green: #2ecc71;
}

body {
    margin: 0;
    display: flex;
    height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* 사이드바 */
#sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    padding: 24px 0;
    border-right: 1px solid var(--border-color);
    flex-shrink: 0;
}

.sidebar-header {
    padding: 0 16px 24px;
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-color);
}

.header-logo {
    width: 20px;         /* 폰트 크기와 비슷한 너비로 설정 (원하시는 대로 조절 가능) */
    height: 20px;        /* 정사각형 비율 유지 */
    object-fit: contain;  /* 이미지가 찌그러지지 않게 비율 조정 */
    margin-right: -2px;   /* 이미지와 글자 사이 간격 미세 조정 */
    flex-shrink: 0;       /* 사이드바가 좁아져도 이미지가 찌그러지지 않게 함 */
}

.menu-category {
    padding: 16px 16px 4px;
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 0.04rem;
}

.menu-item {
    padding: 6px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--text-color);
    text-decoration: none;
    transition: background 0.15s;
}

.menu-item:hover { background-color: var(--hover-color); }
.menu-item.active { background-color: var(--hover-color); font-weight: 500; }

/*=======================================================*/
/* [1] 블로그 목록 (list.html) 전용 스타일                 */
/* ======================================================= */
:root {
    --hover-color: #5c7cff;
    --badge-bg: rgba(92, 124, 255, 0.15);
}

#content { flex: 1; overflow-y: auto; padding: 72px 12% 100px; }
h1 { font-size: 2.2rem; margin: 0 0 24px; }

/* 탭(Tab) 메뉴 스타일 */
.tabs { display: flex; gap: 10px; margin-bottom: 32px; border-bottom: 1px solid rgba(255, 255, 255, 0.05); padding-bottom: 16px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab-btn { background: transparent; border: 1px solid rgba(255, 255, 255, 0.05); color: rgba(255, 255, 255, 0.45); font-size: 0.9rem; font-weight: 600; padding: 8px 18px; cursor: pointer; border-radius: 20px; transition: 0.2s; white-space: nowrap; }
.tab-btn:hover { border-color: var(--hover-color); color: rgba(255, 255, 255, 0.9); }
.tab-btn.active { background: var(--hover-color); border-color: var(--hover-color); color: #fff; }

/* 포스트 카드 스타일 */
.post-card { display: block; background: #1c2033; padding: 24px; border-radius: 12px; border: 1px solid rgba(255, 255, 255, 0.05); margin-bottom: 16px; text-decoration: none; color: rgba(255, 255, 255, 0.9); transition: transform 0.2s, border-color 0.2s; }
.post-card:hover { transform: translateY(-3px); border-color: var(--hover-color); }
.badge { display: inline-block; background: var(--badge-bg); color: #8da4ff; padding: 4px 10px; border-radius: 6px; font-size: 0.75rem; font-weight: 700; margin-bottom: 12px; }
.post-card h3 { margin: 0 0 8px 0; font-size: 1.3rem; }
.post-card p { margin: 0; font-size: 0.9rem; color: rgba(255, 255, 255, 0.45); }

/* ======================================================= */
/* [2] 블로그 포스트 본문 (post.html) 전용 스타일          */
/* ======================================================= */
.back-btn { display: inline-block; margin-bottom: 24px; color: rgba(255, 255, 255, 0.45); text-decoration: none; font-weight: 600; transition: 0.2s; }
.back-btn:hover { color: #fff; }

.post-header { margin-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, 0.05); padding-bottom: 24px; }
.post-title { font-size: 2.5rem; margin: 0 0 12px 0; color: rgba(255, 255, 255, 0.9); }
.post-meta { color: rgba(255, 255, 255, 0.45); font-size: 0.95rem; }

/* 마크다운 요소 디자인 (다크 테마 맞춤) */
.post-body { line-height: 1.7; font-size: 1.05rem; color: rgba(255, 255, 255, 0.85); }
.post-body h1, .post-body h2, .post-body h3 { color: #fff; margin-top: 1.5em; border-bottom: 1px solid rgba(255, 255, 255, 0.05); padding-bottom: 8px; }
.post-body a { color: #5c7cff; text-decoration: none; }
.post-body a:hover { text-decoration: underline; }
.post-body img { max-width: 100%; border-radius: 8px; margin: 16px 0; filter: drop-shadow(0px 0px 10px rgba(255, 255, 255, 0.4)); }
.post-body pre { background: #161925; padding: 16px; border-radius: 8px; overflow-x: auto; border: 1px solid rgba(255, 255, 255, 0.05); }
.post-body code { background: #161925; padding: 2px 6px; border-radius: 4px; font-family: monospace; font-size: 0.9em; color: #ffb86c; }
.post-body blockquote { border-left: 4px solid #5c7cff; padding-left: 16px; color: rgba(255, 255, 255, 0.6); margin: 0; background: rgba(92, 124, 255, 0.05); padding: 12px 16px; border-radius: 0 8px 8px 0; }