/* CSS Variables */
:root {
  --color-primary: #35c5f0;
  --color-primary-dark: #2ba3d4;
  --color-secondary: #f8f9fa;
  --color-accent: #20c997;

  /* Dark palette (default) */
  --color-bg: #1a1a1a;
  --color-bg-secondary: #2d2d2d;
  --color-text: #ffffff;
  --color-text-secondary: #a0a0a0;
  --color-border: #404040;
  --color-shadow: rgba(0, 0, 0, 0.3);
  --color-card-bg: #2d2d2d;
  --color-card-hover: #3a3a3a;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Typography */
  --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --header-height: 64px;
  --sidebar-width: 280px;
  --border-radius: 8px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

a, a:visited { color: inherit; }
/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Container */
.container {
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Scroll Progress Bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 1000;
  transition: width var(--transition-fast);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--spacing-md);
}

.logo a {
  text-decoration: none;
  color: var(--color-text);
}

.logo h1 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
}

/* Navigation */
.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-list a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-list a:hover,
.nav-list a:focus {
  color: var(--color-primary);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav-list a:hover::after,
.nav-list a:focus::after {
  width: 100%;
}

/* Main Content */
.main {
  min-height: calc(100vh - var(--header-height) - 100px);
  padding: var(--spacing-2xl) 0;
}

.content-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
}

/* Posts Grid */
/* 기본(데스크톱) - 2열 고정 */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(1fr); /* 2열 고정 */
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

/* 작은 화면(태블릿 이하) - 1열 */
@media (max-width: 1023px) {
  .posts-grid {
    grid-template-columns: 1fr;
  }
}

.main-posts {
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

/* Post Card */
.post-card {
  background-color: var(--color-card-bg);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 2px 8px var(--color-shadow);
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border);
}

.post-card:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 16px var(--color-shadow);
  background-color: var(--color-card-hover);
}

.post-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.post-thumbnail {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background-color: var(--color-bg-secondary);
  position: relative;
}

.post-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.post-card:hover .post-thumbnail img {
  transform: scale(1.05);
}

.post-content {
  padding: var(--spacing-lg);
}

.post-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-excerpt {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.post-date {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.post-category {
  background-color: transparent;       /* 배경색 제거 */
  color: var(--color-text-secondary);  /* 회색 계열 글자색 */
  border-radius: 12px;
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.tag {
  background-color: transparent;       /* 배경색 제거 */
  color: var(--color-text-secondary);  /* 회색 계열 글자색 */
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 12px;
  font-size: var(--font-size-xs);
  border: 1px solid var(--color-border);
}

/* Sidebar */
/* ───────── Sidebar Base ───────── */
.sidebar {
  display: none;
}

.sidebar-toggle {
  display: none;
  background: none;
  padding: var(--spacing-sm);
  cursor: pointer;
  margin-bottom: var(--spacing-md);
  flex-direction: column;
  gap: 4px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
}

.sidebar-toggle span {
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-fast);
}

.sidebar-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

/* ───────── Sidebar Category Style ───────── */
.sidebar .tags-cloud ul,
.sidebar .tags-cloud li {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* 1) 대카테고리 */
.sidebar .tags-cloud > ul > li { padding: 6px 0; }
.sidebar .tags-cloud > ul > li > a {
  display: block;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
}

/* 2) 소카테고리 */
.sidebar .tags-cloud ul ul {
  margin-top: 4px;
  margin-left: 12px;
  padding-left: 10px;
  border-left: 1px dashed var(--color-border);
}
.sidebar .tags-cloud ul ul li { padding: 3px 0; }
.sidebar .tags-cloud ul ul a {
  display: block;
  font-size: 0.9em;
  font-weight: 500;
  color: var(--color-text-secondary);
}

/* 3) 소카테고리 점 표시 */
.sidebar .tags-cloud ul ul a::before {
  content: "•";
  display: inline-block;
  width: 10px;
  margin-left: -10px;
  opacity: .7;
}

/* 4) Hover */
.sidebar .tags-cloud a:hover { color: var(--color-primary); }

/* ───────── Desktop Layout ───────── */
@media (min-width: 1024px) {
  .content-wrapper {
    grid-template-columns: minmax(220px, 280px) 1fr;
    align-items: start; /* 중복 합치기 */
  }

  .sidebar {
    display: block; /* 데스크탑에서는 표시 */
    order: -1;
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
    height: calc(100vh - var(--header-height) - var(--spacing-2xl));
    overflow: auto;

    max-width: 320px;   /* 가로 길이 제한 */
    width: 100%;        /* grid 비율 안에서 꽉 채움 */
    /* 스크롤바 숨김 */
    -ms-overflow-style: none; /* IE/Edge */
    scrollbar-width: none;    /* Firefox */
  }
  .sidebar::-webkit-scrollbar { display: none; }
}


/* Author Bio */
.author-bio {
  text-align: center;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
}

.author-avatar {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--color-primary);
}

.author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.author-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.social-links a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.social-links a:hover {
  color: var(--color-primary);
}

/* Recent Posts */
.recent-list {
  list-style: none;
}

.recent-list li {
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-sm) 0;
}

.recent-list li:last-child {
  border-bottom: none;
}

.recent-link {
  text-decoration: none;
  color: inherit;
  display: block;
  transition: color var(--transition-fast);
}

.recent-link:hover {
  color: var(--color-primary);
}

.recent-title {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-sm);
}

.recent-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}
/* Post */
/* --- 글보기 전용 레이아웃 --- */
.post-view{
  display: grid;                     /* ← 실제 그리드로 전환 */
  grid-template-columns: 1fr 260px;  /* 본문 1fr | 목차 260px */
  gap: var(--spacing-2xl);
  align-items: start;
}

.post-view .post-body,
.post-view #comments{
  grid-column: 1;
}

/* 목차는 오른쪽 컬럼 + sticky(겹침 방지) */
.toc{
  grid-column: 2;
  position: sticky;                  /* ← absolute 제거 */
  top: calc(var(--header-height) + 20px);
  right: auto;                       /* 기존 right:-250px 무효화 */
  width: auto;                       /* 고정폭 제거 */
  max-height: calc(100vh - var(--header-height) - 40px);
  overflow: auto;
  padding-left: 0;
  border-left: 0;
  border-right: 3px solid var(--color-primary);
  background: transparent;
}

/* 모바일에선 목차 감춤 */
@media (max-width: 1023px){
  .post-view{ grid-template-columns: 1fr; }
  .toc{ display: none; }
}

/* 모바일에선 목차 숨김 */
@media(max-width:1023px){
  .post-view{grid-template-columns:1fr;}
  .toc{display:none;}
}

/* 본문 영역 */
.markdown-body{
  line-height:1.8;
  font-size:var(--font-size-lg);
  color:var(--color-text);
}

/* 목차 항목 스타일 */
.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc li {
  margin: 5px 0;
}

.toc a {
  text-decoration: none;
  color: var(--color-text);
  font-size: 14px;
}

.toc a.active {
  font-weight: bold;
  color: var(--color-primary);
}
.post-view {
  position: relative;
}
/* ── Permalink에서 빈 칸 제거: post-view가 있으면 두 칼럼 모두 차지 ── */
.posts-grid > .post-view { 
  grid-column: 1 / -1; 
}

/* ── 본문 | 목차 2열 레이아웃(본문 넓이 + 우측 TOC) ── */
@media (min-width: 1024px) {
  .post-view {
    display: grid;
    grid-template-columns: 1fr 260px;   /* 본문 | 목차 */
    gap: var(--spacing-2xl);
    align-items: start;
  }
  /* 기존 absolute 배치를 덮지 않고 “우선순위”로만 교정 */
  .toc {
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
    right: auto;
    width: auto;
    max-height: calc(100vh - var(--header-height) - var(--spacing-xl));
    overflow-y: auto;
    border-right: none;
    border-left: 3px solid var(--color-primary);
    padding-left: var(--spacing-md);
  }
}

/* Comment write form dark theme fix */
.tt-area-write input[type="text"],
.tt-area-write input[type="password"],
.tt-area-write input[type="email"],
.tt-area-write textarea {
  background: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.tt-area-write { display: block !important; }

/* Responsive Design */

/* Tablet (768px and up) */
@media (min-width: 768px) {
  
  .container {
    padding: 0 var(--spacing-lg);
  }
}

/* Large Desktop (1200px and up) */
@media (min-width: 1200px) {

}

/* Mobile Styles (below 640px) */
@media (max-width: 639px) {
  .nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  
  .header-content {
    gap: var(--spacing-sm);
  }
  
  .logo h1 {
    font-size: var(--font-size-lg);
  }
  
  .post-card {
    margin: 0 -var(--spacing-xs);
  }
  
  .sidebar-toggle {
    display: flex;
  }
  
  .sidebar {
    display: block;
    margin-top: var(--spacing-lg);
  }
  
  .sidebar-content {
    display: none;
  }
  
  .sidebar.open .sidebar-content {
    display: flex;
  }
}

blockquote{
  /* 레이아웃 */
  margin: var(--spacing-lg) 0;          /* 위‧아래 간격 */
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 6px solid var(--color-primary);  /* 좌측 파란 바 */

  /* 시각 디자인 */
  background-color: rgba(53, 197, 240, .08);    /* 파란색 8% 투명도로 하이라이트 */
  border-radius: var(--border-radius);
  box-shadow: 0 2px 6px var(--color-shadow);

  /* 타이포그래피 */
  font-size: var(--font-size-xl);       /* 본문보다 크게 */
  line-height: 1.8;
  font-weight: 500;
  color: #ffffff !important;
}

/* 첫·마지막 단락 여백 제거 (마크다운이 <p>를 여러 개 만들 때) */
blockquote p:first-child{margin-top:0;}
blockquote p:last-child {margin-bottom:0;}
blockquote p {color: #ffffff;}
/* 출처(cite) 표기 예쁘게 */
blockquote cite{
  display:block;
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-sm);
  text-align:right;
}
/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* ===== Code Block (Dark-friendly) ===== */
:root {
  --cbg: #111;          /* 배경 */
  --cborder: #2a2a2a;   /* 테두리 */
  --ctext: #eaeaea;     /* 기본 텍스트 */
  --csub: #a8a8a8;      /* 보조 텍스트 */
  --ctag: #4da3ff;      /* 라벨/강조 */
}

/* 마크다운의 ``` 로 생성되는 pre > code 를 감싸는 래퍼 */
.codeblock {
  position: relative;
  margin: 1.25rem 0;
  background: var(--cbg);
  border: 1px solid var(--cborder);
  border-radius: 10px;
  overflow: hidden;
  /* 헤더(라벨+Copy) 들어갈 공간 확보 */
  padding-top: 38px;
}

/* 실제 코드 영역 */
.codeblock pre {
  margin: 0;
  padding: 16px 18px 18px;
  overflow: auto;
  line-height: 1.55;
  color: var(--ctext);
  background: transparent !important; /* 테마 충돌 방지 */
  font-family: "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.95rem;
  tab-size: 2;
  -webkit-font-smoothing: antialiased;
}

/* 상단 바(언어 라벨 + Copy 버튼) */
.codeblock__bar {
  position: absolute;
  inset: 0 0 auto 0; /* top:0, left/right:0 */
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px 0 12px;
  border-bottom: 1px solid var(--cborder);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0));
  backdrop-filter: saturate(120%) blur(0.5px);
}

/* 언어 라벨 */
.codeblock__lang {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ctag);
  text-transform: lowercase; /* bash, python 등 소문자로 통일 */
  user-select: none;
}

/* Copy 버튼(배경 없음, 글씨만) */
.codeblock__copy {
  appearance: none;
  border: none;
  background: none;          /* ✅ 요구 4 */
  color: var(--csub);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 6px;
  border-radius: 6px;        /* 클릭 영역만 둥글게 */
  transition: color .15s ease;
}
.codeblock__copy:hover { color: var(--ctext); }
.codeblock__copy:active { transform: translateY(1px); }

/* 선택 영역 색상(가독성 향상) */
.codeblock ::selection {
  background: rgba(77,163,255,0.28);
}

/* (선택) 아주 약한 토큰 하이라이트 - 라이브러리 없어도 기본 가독성 보정 */
.codeblock code .comment,
.codeblock code .prolog,
.codeblock code .doctype,
.codeblock code .cdata { color: #7c7c7c; }
.codeblock code .punctuation { color: #d0d0d0; }
.codeblock code .property,
.codeblock code .tag,
.codeblock code .constant,
.codeblock code .symbol { color: #ffb86c; }
.codeblock code .boolean,
.codeblock code .number { color: #bd93f9; }
.codeblock code .selector,
.codeblock code .attr-name,
.codeblock code .string { color: #98c379; }
.codeblock code .function { color: #61afef; }
.codeblock code .keyword,
.codeblock code .operator { color: #ff79c6; }

/* ===== Code inner background reset ===== */
.codeblock pre,
.codeblock code,
.codeblock pre *,
.codeblock code *,
.codeblock table,
.codeblock tbody,
.codeblock tr,
.codeblock td,
.syntaxhighlighter,
.syntaxhighlighter *,
.ttb-code-block,
.ttb-code-block *,
figure.highlight,
figure.highlight *,
.highlight,
.highlight * {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
}

/* 글자색도 혹시 흐리면 보정 */
.codeblock,
.codeblock * {
  color: var(--ctext, #eaeaea) !important;
}