/* ═══════════════════════════════════════════
   AI ROASTING | Design System
   이코노미스트 스타일 · 라이트 온리
   ═══════════════════════════════════════════ */

/* --- Playfair Display (Logo) --- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@700&display=swap');

/* --- Pretendard Local Font --- */
@font-face {
  font-family: 'Pretendard';
  src: url('../fonts/PretendardVariable.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* --- Design Tokens (Material Design 3) --- */
:root {
  /* M3 Surface hierarchy */
  --bg:                     #F2F0EB;
  --surface:                #F2F0EB;
  --surface-container-low:  #F2F0EB;
  --surface-container:      #F2F0EB;
  --surface-container-high: #EAE7E1;

  /* M3 Outline */
  --border:         #C8C2BA;
  --border-variant: #DDD8D0;

  /* Brand */
  --header:   #C43500;
  --primary:  #1B2A4A;

  --on-primary: #FFFFFF;
  --ai:       #5B4FE8;

  /* Typography */
  --text:           #1C1B20;
  --text-muted:     #49454E;
  --text-secondary: #6B6578;

  --font-heading: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body:    'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-en:      'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-meta:    'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Category colors */
  --cat-research: #7A4030;
  --cat-leader:   #C43500;
  --cat-company:  #1A4A7A;
  --cat-tech:     #145C35;
  --cat-survival: #7A1F1F;

  /* Category surface tints */
  --cat-research-surface: #EBE0D9;
  --cat-leader-surface:   #FADDD0;
  --cat-company-surface:  #D9E4F0;
  --cat-tech-surface:     #D8EADF;
  --cat-survival-surface: #EADADA;

  /* Neumorphism System */
  --nm-bg:        #F2F0EB;
  --nm-dark:      #D8D4CC;
  --nm-light:     #FDFCF9;
  --nm-raised:    5px 5px 12px #D8D4CC, -5px -5px 12px #FDFCF9;
  --nm-raised-sm: 3px 3px 8px #D8D4CC, -3px -3px 8px #FDFCF9;
  --nm-raised-lg: 7px 7px 18px #D8D4CC, -7px -7px 18px #FDFCF9;
  --nm-inset:     inset 5px 5px 12px #D8D4CC, inset -5px -5px 12px #FDFCF9;
  --nm-inset-sm:  inset 2px 2px 6px #D8D4CC, inset -2px -2px 6px #FDFCF9;

  /* M3 Elevation shadows — nm 값으로 교체 */
  --shadow-1: var(--nm-raised-sm);
  --shadow-2: var(--nm-raised);
  --shadow-3: var(--nm-raised-lg);

  /* M3 Shape */
  --radius:       12px;
  --radius-sm:    8px;
  --radius-full:  100px;
  --card-gap:     20px;

  /* Footer */
  --footer-bg:     #1A1917;
  --footer-text:   #E8ECF2;
  --footer-muted:  #6B7280;
  --footer-border: #2D2B28;

  /* AI surface */
  --ai-surface:     #F0EEFF;
  --ai-surface-alt: #EEF0FF;

  /* Category color (JS per-post override) */
  --category-color: var(--cat-leader);
}

/* --- Reset --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* --- Base --- */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.85;
  font-size: 17px;
  word-break: keep-all;
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20'%3E%3Ccircle cx='10' cy='10' r='4' fill='%23C43500' /%3E%3Ccircle cx='10' cy='10' r='9' stroke='%23C43500' stroke-width='1' fill='none' opacity='0.3' /%3E%3C/svg%3E") 10 10, auto;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* --- Layout --- */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header --- */
.site-header {
  background: var(--bg);
}

/* Row 1: Logo + Utility */
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
}

.site-logo {
  display: inline-block;
  font-family: 'Playfair Display', Georgia, 'Times New Roman', serif;
  font-size: 22px;
  font-weight: 700;
  font-style: normal;
  color: #E8ECF2;
  background: #1B2A4A;
  padding: 14px 28px;
  letter-spacing: 1.5px;
  line-height: 1.15;
  transition: background 0.25s;
}

.site-logo:hover {
  background: #243660;
  color: #FFFFFF;
}

.header-utils {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-utils .about-link {
  font-family: var(--font-meta);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.3px;
  transition: color 0.2s;
}

.header-utils .about-link:hover {
  color: var(--header);
}

/* Row 2: Category Nav Bar */
.nav-bar {
  border-top: 1px solid #1A1A1A;
  border-bottom: 1px solid var(--border);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.main-nav::-webkit-scrollbar {
  display: none;
}

.main-nav a {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  padding: 12px 20px;
  white-space: nowrap;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.main-nav a:first-child {
  padding-left: 0;
}

.main-nav a:hover {
  color: var(--header);
}

.main-nav a.active {
  border-bottom-color: var(--header);
  color: var(--header);
}

.main-nav .nav-newsletter {
  margin-left: auto;
  color: #7C3AED;
  font-weight: 700;
}
.main-nav .nav-newsletter:hover {
  color: #6D28D9;
}
.main-nav .nav-newsletter.active {
  border-bottom-color: #7C3AED;
  color: #7C3AED;
}
[data-theme="dark"] .main-nav .nav-newsletter {
  color: #C4B5FD;
}
[data-theme="dark"] .main-nav .nav-newsletter:hover {
  color: #DDD6FE;
}
[data-theme="dark"] .main-nav .nav-newsletter.active {
  border-bottom-color: #C4B5FD;
  color: #C4B5FD;
}

/* ── 홈 뉴스레터 그리드 ── */
:root { --cat-newsletter: #7C3AED; }
.nl-home-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 220px;
  gap: 16px;
  margin-top: 20px;
  margin-bottom: 60px;
}
.nl-home-grid .nl-card:nth-child(1) { grid-column: span 2; grid-row: span 2; }
/* 하단 행: 왼쪽 작은 카드 2개 스택 + 오른쪽 와이드 카드 1개 */
.nl-home-grid .nl-card:nth-child(6) { grid-column: 1; grid-row: 3; }
.nl-home-grid .nl-card:nth-child(7) { grid-column: 1; grid-row: 4; }
.nl-home-grid .nl-card:nth-child(8) { grid-column: 2 / 5; grid-row: 3 / 5; }
.nl-home-grid .nl-card {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  display: block;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--nm-raised);
  transition: box-shadow 0.3s cubic-bezier(0.2,0,0,1), transform 0.3s cubic-bezier(0.2,0,0,1);
}
.nl-home-grid .nl-card:hover {
  box-shadow: var(--nm-raised-lg);
  transform: translateY(-4px);
}
.nl-home-grid .nl-thumb {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s cubic-bezier(0.4,0,0.2,1);
}
.nl-home-grid .nl-card:hover .nl-thumb { transform: scale(1.07); }
.nl-home-grid .nl-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(4,0,12,0.92) 0%, rgba(4,0,12,0.55) 40%, rgba(0,0,0,0.08) 75%, transparent 100%);
  z-index: 1;
}
.nl-home-grid .nl-ep {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 3;
  background: rgba(109,40,217,0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.05em;
}
.nl-home-grid .nl-body {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  padding: 14px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nl-home-grid .nl-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff !important;
  line-height: 1.45;
  word-break: keep-all;
  text-shadow: 0 1px 4px rgba(0,0,0,0.5);
}
.nl-home-grid .nl-date {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
}
.nl-home-grid .nl-thumb.img-error {
  background: linear-gradient(135deg, #1E0B4B 0%, #3B1F8C 55%, #5B21B6 100%);
}
@media (max-width: 900px) {
  .nl-home-grid { grid-template-columns: repeat(3, 1fr); grid-auto-rows: 180px; }
  .nl-home-grid .nl-card:nth-child(1) { grid-column: span 2; grid-row: span 2; }
  /* 3열: 하단 배치 리셋 → 자동 배치 */
  .nl-home-grid .nl-card:nth-child(6) { grid-column: auto; grid-row: auto; }
  .nl-home-grid .nl-card:nth-child(7) { grid-column: auto; grid-row: auto; }
  .nl-home-grid .nl-card:nth-child(8) { grid-column: span 2; grid-row: auto; }
}
@media (max-width: 600px) {
  .nl-home-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 160px; }
  .nl-home-grid .nl-card:nth-child(1) { grid-column: span 2; grid-row: span 1; }
  .nl-home-grid .nl-card:nth-child(6) { grid-column: auto; grid-row: auto; }
  .nl-home-grid .nl-card:nth-child(7) { grid-column: auto; grid-row: auto; }
  .nl-home-grid .nl-card:nth-child(8) { grid-column: span 2; grid-row: auto; }
}



/* --- Human/AI Toggle --- */
.view-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-family: var(--font-meta);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 1px;
}

.view-toggle button {
  border: none;
  background: none;
  padding: 6px 0;
  width: 60px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.2s;
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  text-align: center;
}

.view-toggle button.active {
  background: var(--text);
  color: #fff;
}

.view-toggle button[data-view="ai"].active {
  background: var(--ai);
  color: #fff;
}


/* --- AI View Banner --- */
.ai-banner {
  display: none;
  background: var(--ai-surface);
  color: var(--ai);
  font-family: var(--font-meta);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  text-align: center;
  padding: 10px;
  animation: slideDown 0.3s ease;
}

.ai-banner.visible {
  display: block;
}

@keyframes slideDown {
  from { transform: translateY(-100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* --- Featured Hero (Neumorphism Inset → Raised on hover) --- */
.featured-hero {
  padding: 48px 40px 44px;
  border-bottom: none;
  border-radius: 24px;
  background: var(--nm-bg);
  box-shadow: var(--nm-inset);
  margin-top: 32px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.3s cubic-bezier(0.2,0,0,1);
}

.featured-hero:hover {
  box-shadow: var(--nm-raised-lg);
}

.hero-char-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  border-radius: inherit;
}

.featured-hero-link {
  display: block;
  text-decoration: none;
  color: inherit;
  position: relative;
  z-index: 1;
}

/* Accent bar — category color */
.featured-hero-accent {
  display: block;
  width: 56px;
  height: 4px;
  margin-bottom: 20px;
  border-radius: 2px;
}

.featured-hero[data-hero-cat="research"] .featured-hero-accent { background: var(--cat-research); }
.featured-hero[data-hero-cat="leader"]   .featured-hero-accent { background: var(--cat-leader); }
.featured-hero[data-hero-cat="company"]  .featured-hero-accent { background: var(--cat-company); }
.featured-hero[data-hero-cat="tech"]     .featured-hero-accent { background: var(--cat-tech); }
.featured-hero[data-hero-cat="survival"] .featured-hero-accent { background: var(--cat-survival); }

/* Meta row */
.featured-hero-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
}

.featured-hero-cat {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.featured-hero[data-hero-cat="research"] .featured-hero-cat { color: var(--cat-research); }
.featured-hero[data-hero-cat="leader"]   .featured-hero-cat { color: var(--cat-leader); }
.featured-hero[data-hero-cat="company"]  .featured-hero-cat { color: var(--cat-company); }
.featured-hero[data-hero-cat="tech"]     .featured-hero-cat { color: var(--cat-tech); }
.featured-hero[data-hero-cat="survival"] .featured-hero-cat { color: var(--cat-survival); }

.featured-hero-meta-date,
.featured-hero-meta-source {
  font-family: var(--font-body);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* Content */
.featured-hero-content {
  padding: 0;
}

.featured-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4.5vw, 48px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 20px;
  word-break: keep-all;
  letter-spacing: -0.02em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.featured-hero-link:hover .featured-hero-title {
  text-decoration: none;
}

.featured-hero-summary {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 680px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 24px;
}

/* CTA — flat editorial link */
.featured-hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-meta);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--header);
  background: none;
  box-shadow: none;
  padding: 0;
  border-bottom: 1.5px solid var(--header);
  padding-bottom: 2px;
  transition: opacity 0.2s;
}

.featured-hero-link:hover .featured-hero-cta {
  opacity: 0.7;
}

/* Legacy elements — hidden */
.featured-hero-image,
.featured-hero-overlay,
.featured-hero-badge,
.featured-hero-date,
.featured-hero-source-tag {
  display: none;
}

/* --- Section Headers (Neumorphism) --- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 36px 0 14px;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  margin-bottom: 0;
}

.section-title {
  font-family: var(--font-meta);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.post-count {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-left: 6px;
  background: var(--nm-bg);
  box-shadow: var(--nm-inset-sm);
  padding: 2px 10px;
  border-radius: 100px;
}

.section-desc {
  font-size: 12px;
  font-family: var(--font-meta);
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--text-secondary);
  background: var(--nm-bg);
  box-shadow: var(--nm-inset-sm);
  padding: 4px 14px;
  border-radius: 100px;
  display: inline-block;
}

/* --- First Visit Guide --- */
.first-visit {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 24px 0 32px;
  border-bottom: 1px solid var(--border);
}

.first-visit a {
  display: block;
  padding: 16px;
  background: var(--surface);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: background 0.2s;
}

.first-visit a:hover {
  background: var(--border);
}

.first-visit .label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

/* --- Card Grid (Bento) --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: minmax(180px, auto);
  gap: var(--card-gap);
  padding: 24px 0 32px;
  align-items: stretch;
}

/* Bento rhythm — 1st card wide, every 7th tall */
.card-grid .card:nth-child(1) { grid-column: span 2; }
.card-grid .card:nth-child(7n) { grid-row: span 2; }

/* span 2 카드 제목 확대 */
.card-grid .card:nth-child(1) .card-title {
  font-size: 24px;
  font-weight: 800;
}

/* --- Card (Neumorphism) --- */
.card {
  border: none;
  border-radius: 20px;
  padding: 24px 22px 20px;
  background: var(--nm-bg);
  box-shadow: var(--nm-raised);
  transition: box-shadow 0.25s cubic-bezier(0.2,0,0,1),
              transform 0.25s cubic-bezier(0.2,0,0,1);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  min-width: 0;
  gap: 0;
  overflow: hidden;
  position: relative;
}

.card-char-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  border-radius: inherit;
}

.card-body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0;
}

.card.revealed:hover {
  box-shadow: var(--nm-raised-lg);
  transform: translateY(-3px);
}

/* Category backgrounds — neumorphism: 배경 단일화 */
.card[data-category="research"] { background: var(--nm-bg); }
.card[data-category="leader"]   { background: var(--nm-bg); }
.card[data-category="company"]  { background: var(--nm-bg); }
.card[data-category="tech"]     { background: var(--nm-bg); }
.card[data-category="survival"] { background: var(--nm-bg); }

/* Category color top accent stripe via ::before */
.card::before {
  content: '';
  display: block;
  height: 4px;
  margin: -24px -22px 18px;
  border-radius: 19px 19px 0 0;
  flex-shrink: 0;
}
.card[data-category="research"]::before { background: var(--cat-research); }
.card[data-category="leader"]::before   { background: var(--cat-leader); }
.card[data-category="company"]::before  { background: var(--cat-company); }
.card[data-category="tech"]::before     { background: var(--cat-tech); }
.card[data-category="survival"]::before { background: var(--cat-survival); }

/* Category badge color */
.card[data-category="research"] .card-badge { color: var(--cat-research); }
.card[data-category="leader"]   .card-badge { color: var(--cat-leader); }
.card[data-category="company"]  .card-badge { color: var(--cat-company); }
.card[data-category="tech"]     .card-badge { color: var(--cat-tech); }
.card[data-category="survival"] .card-badge { color: var(--cat-survival); }

/* 카테고리별 커스텀 shadow 제거 — 단일 nm-raised 사용 */

/* Featured hero — neumorphism: 배경 단일화 */
.featured-hero[data-hero-cat="research"],
.featured-hero[data-hero-cat="leader"],
.featured-hero[data-hero-cat="company"],
.featured-hero[data-hero-cat="tech"],
.featured-hero[data-hero-cat="survival"] { background: var(--nm-bg); }

/* Thumbnail — hidden */
.card-thumb {
  display: none;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.card-badge {
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.card-date {
  font-family: var(--font-meta);
  font-size: 11px;
  color: var(--text-muted);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 14px;
  min-height: auto;
  overflow-wrap: break-word;
  word-break: keep-all;
  flex: 1;
  -webkit-font-smoothing: antialiased;
}

.card:hover .card-title {
  opacity: 0.82;
}

/* M3 Assist Chip */
.card-source-tag {
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  background: rgba(0,0,0,0.06);
  border: none;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-top: auto;
  display: inline-block;
  align-self: flex-start;
}

.card-summary {
  display: none;
}

/* --- Skeleton Card (Neumorphism) --- */
.skeleton-card {
  border: none;
  border-radius: 20px;
  padding: 24px;
  background: var(--nm-bg);
  box-shadow: var(--nm-raised);
}

.skeleton-line {
  background: linear-gradient(90deg, var(--surface) 25%, var(--border) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: pulse 1.5s ease-in-out infinite;
  border-radius: 4px;
  margin-bottom: 10px;
}

.skeleton-line.badge { width: 60px; height: 14px; }
.skeleton-line.title { width: 100%; height: 24px; }
.skeleton-line.summary { width: 80%; height: 16px; }

@keyframes pulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Post Page --- */
.post {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  animation: postFadeIn 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
}

@keyframes postFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- Post Header — Typography Only --- */
.post-thumbnail-hero {
  position: relative;
  aspect-ratio: unset;
  overflow: visible;
  border-radius: 0;
  margin-bottom: 0;
  padding: 48px 0 36px;
  border-bottom: 3px solid var(--text);
  display: flex;
  flex-direction: column;
}

/* Hero decorative accent line animation */
.post-thumbnail-hero::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--category-color, var(--cat-leader));
  animation: heroLineExpand 0.8s 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes heroLineExpand {
  to { width: 100%; }
}

/* Hide thumbnail image */
.post-thumbnail-hero > img {
  display: none;
}
.post-thumbnail-hero:hover img {
  transform: none;
}

/* Color bar → accent strip */
.post-thumbnail-hero .post-color-bar {
  position: static;
  width: 48px;
  height: 4px;
  border-radius: 0;
  margin-bottom: 24px;
  order: 1;

}

.post-thumbnail-hero[data-category="research"] .post-color-bar { background: var(--cat-research); }
.post-thumbnail-hero[data-category="leader"]   .post-color-bar { background: var(--cat-leader); }
.post-thumbnail-hero[data-category="company"]  .post-color-bar { background: var(--cat-company); }
.post-thumbnail-hero[data-category="tech"]     .post-color-bar { background: var(--cat-tech); }
.post-thumbnail-hero[data-category="survival"] .post-color-bar { background: var(--cat-survival); }

/* Meta row → normal flow */
.post-hero-meta {
  position: static;
  top: auto; left: auto; right: auto;
  z-index: auto;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0;
  margin-bottom: 20px;
  order: 2;
}

.post-hero-meta .post-category {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: inherit !important;
  background: transparent !important;
  padding: 0;
  border-radius: 0;
}

.post-thumbnail-hero[data-category="research"] .post-hero-meta .post-category { color: var(--cat-research) !important; }
.post-thumbnail-hero[data-category="leader"]   .post-hero-meta .post-category { color: var(--cat-leader) !important; }
.post-thumbnail-hero[data-category="company"]  .post-hero-meta .post-category { color: var(--cat-company) !important; }
.post-thumbnail-hero[data-category="tech"]     .post-hero-meta .post-category { color: var(--cat-tech) !important; }
.post-thumbnail-hero[data-category="survival"] .post-hero-meta .post-category { color: var(--cat-survival) !important; }

.post-hero-meta .post-date,
.post-hero-meta .post-read-time {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-muted);
  background: transparent;
  padding: 0;
  border-radius: 0;
  letter-spacing: 0.5px;
}

/* Title overlay → normal block with large typography */
.post-thumbnail-overlay {
  position: static;
  inset: auto;
  display: block;
  background: none;
  padding: 0;
  margin-bottom: 20px;
  z-index: auto;
  order: 3;
}

.post-thumbnail-overlay .post-title {
  color: var(--text) !important;
  text-shadow: none;
  text-align: left;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  word-break: keep-all;
  margin-bottom: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: color 0.25s ease;
  cursor: default;
}
.post[data-category="research"] .post-thumbnail-overlay .post-title:hover { color: var(--cat-research) !important; }
.post[data-category="leader"]   .post-thumbnail-overlay .post-title:hover { color: var(--cat-leader)   !important; }
.post[data-category="company"]  .post-thumbnail-overlay .post-title:hover { color: var(--cat-company)  !important; }
.post[data-category="tech"]     .post-thumbnail-overlay .post-title:hover { color: var(--cat-tech)     !important; }
.post[data-category="survival"] .post-thumbnail-overlay .post-title:hover { color: var(--cat-survival) !important; }

/* Bottom (source + tags) → normal flow */
.post-hero-bottom {
  position: static;
  bottom: auto; left: auto; right: auto;
  z-index: auto;
  padding: 0;
  margin-top: 20px;
  order: 4;
}

.post-hero-source {
  display: flex;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 10px;
}

.post-hero-source span + span::before {
  content: "·";
  margin-right: 8px;
  color: var(--border);
}

.post-hero-source a {
  color: var(--text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}

.post-hero-source a:hover {
  color: var(--text);
}

.post-hero-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.post-hero-tags .post-tag {
  font-size: 10px;
  color: var(--text-muted);
  background: var(--nm-bg);
  border: none;
  padding: 3px 10px;
  border-radius: 100px;
  backdrop-filter: none;
  box-shadow: var(--nm-raised-sm);
  transition: box-shadow 0.25s, color 0.2s, transform 0.2s;
}

.post-hero-tags .post-tag:hover {
  background: var(--nm-bg);
  box-shadow: var(--nm-inset-sm);
  color: var(--text);
  transform: translateY(1px);
}

/* legacy — post-thumbnail-hero context above is canonical */
/* standalone .post-color-bar: border-radius differs (2px vs 0), kept for non-hero pages */
/* background per category covered by hero context selectors above */
.post-color-bar {
  border-radius: 2px;
}

.post-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.post-category {
  font-family: var(--font-meta);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.post-category[data-category="research"] { color: var(--cat-research); }
.post-category[data-category="leader"]   { color: var(--cat-leader); }
.post-category[data-category="company"]  { color: var(--cat-company); }
.post-category[data-category="tech"]     { color: var(--cat-tech); }
.post-category[data-category="survival"] { color: var(--cat-survival); }

.post-date {
  font-family: var(--font-meta);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.post-tags {
  display: flex;
  gap: 8px;
  padding-bottom: 20px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.post-tag {
  font-family: var(--font-meta);
  font-size: 11px;
  color: var(--text-muted);
  background: var(--surface);
  padding: 2px 8px;
  border-radius: 0;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.post-tag:hover {
  background: var(--text);
  color: #fff;
}

.post-title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  word-break: keep-all;
}

.post-original {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.post-original-meta {
  display: flex;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  flex-wrap: wrap;
  align-items: center;
}

.post-original-meta span {
  white-space: nowrap;
}

.post-original-meta span + span::before {
  content: "·";
  margin-right: 8px;
  color: var(--border);
}

.post-original-meta a {
  color: var(--text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}

.post-original-meta a:hover {
  color: var(--header);
}

/* --- Post Sections --- */
.post-section {
  margin-bottom: 56px;
  opacity: 0;
  transform: translateY(12px);
  animation: sectionReveal 0.5s ease forwards;
}

.post-section:nth-child(1)  { animation-delay: 0.1s; }
.post-section:nth-child(2)  { animation-delay: 0.15s; }
.post-section:nth-child(3)  { animation-delay: 0.2s; }
.post-section:nth-child(4)  { animation-delay: 0.25s; }
.post-section:nth-child(5)  { animation-delay: 0.3s; }
.post-section:nth-child(6)  { animation-delay: 0.35s; }
.post-section:nth-child(7)  { animation-delay: 0.4s; }
.post-section:nth-child(8)  { animation-delay: 0.45s; }
.post-section:nth-child(9)  { animation-delay: 0.5s; }
.post-section:nth-child(10) { animation-delay: 0.55s; }
.post-section:nth-child(n+11) { animation-delay: 0.6s; }

@keyframes sectionReveal {
  to { opacity: 1; transform: translateY(0); }
}

.post-section-label {
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--category-color, var(--text-muted));
  padding-top: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--text);
  margin-bottom: 24px;
  position: relative;
}

.post-section-label::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--category-color, var(--cat-leader));
}

/* Section label text color by category context */
.post[data-category="research"] .post-section-label { color: var(--cat-research); }
.post[data-category="leader"] .post-section-label   { color: var(--cat-leader); }
.post[data-category="company"] .post-section-label  { color: var(--cat-company); }
.post[data-category="tech"] .post-section-label     { color: var(--cat-tech); }
.post[data-category="survival"] .post-section-label { color: var(--cat-survival); }

.post-section p {
  font-size: 15px;
  line-height: 1.95;
  margin-bottom: 16px;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.post-section p strong {
  font-weight: 700;
  color: var(--text);
}

.post-section a {
  transition: color 0.2s;
}

.post-section a:hover {
  color: var(--text) !important;
}

/* --- Roasting Quote --- */
.roasting-block {
  margin: 40px 0;
  padding: 28px 32px;
  background: var(--nm-bg);
  border-radius: 16px;
  box-shadow: var(--nm-inset);
  position: relative;
  border-left: 3px solid var(--category-color, var(--cat-leader));
}

.roasting-block::before {
  content: '"';
  position: absolute;
  top: 12px;
  left: 20px;
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 48px;
  font-weight: 700;
  color: var(--category-color, var(--cat-leader));
  opacity: 0.2;
  line-height: 1;
}

.roasting-block blockquote {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 0;
  padding-left: 8px;
}

.roasting-block .attribution {
  font-family: var(--font-meta);
  font-size: 12px;
  color: var(--text-muted);
  text-align: right;
  letter-spacing: 1px;
  margin-top: 8px;
}

/* --- Decision Points --- */
.decision-points {
  margin: 36px 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border-variant);
}

.decision-point {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  text-align: left;
  gap: 20px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-variant);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  background: none;
  border-left: none;
  border-radius: 0;
}

.decision-point:nth-child(1) { background: var(--nm-bg); }
.decision-point:nth-child(2) { background: var(--nm-bg); }
.decision-point:nth-child(3) { background: var(--nm-bg); }

.decision-role {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  min-width: 72px;
  padding: 0;
  border-radius: 0;
  background: none;
  white-space: nowrap;
  flex-shrink: 0;
  text-align: left;
}

.decision-point:nth-child(1) .decision-role { color: var(--cat-leader); background: none; }
.decision-point:nth-child(2) .decision-role { color: var(--cat-company); background: none; }
.decision-point:nth-child(3) .decision-role { color: var(--cat-research); background: none; }

/* --- Action Steps --- */
.action-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.action-step {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 24px;
  background: var(--nm-bg);
  border-radius: 16px;
  box-shadow: var(--nm-raised-sm);
  font-size: 15px;
  line-height: 1.85;
  transition: box-shadow 0.25s, transform 0.2s;
}

.action-step:hover {
  box-shadow: var(--nm-inset-sm);
  transform: translateY(1px);
}

.action-num {
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 700;
  color: var(--category-color, var(--text-muted));
  min-width: 32px;
  text-align: center;
  line-height: 1.2;
  flex-shrink: 0;
  opacity: 0.6;
}

.action-body {
  flex: 1;
}

/* --- References List --- */
.references-list {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
  list-style: disc;
  padding-left: 1.2em;
  margin: 0;
}

/* --- References Link --- */
.references-list a {
  color: var(--text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.references-list a:hover {
  color: var(--header);
}

/* --- Hero CTA (원문 보기) --- */
.hero-cta {
  font-size: 14px;
  font-family: 'Pretendard', var(--font-body);
  transition: color 0.2s;
}
.hero-cta:hover {
  color: var(--header);
}

/* --- Related Posts --- */
.related-posts {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.related-posts-title {
  font-family: var(--font-meta);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

/* --- Next Post Recommendation --- */
.next-post {
  margin-top: 32px;
  padding: 24px 28px;
  background: var(--nm-bg);
  border-radius: 20px;
  box-shadow: var(--nm-raised);
  transition: box-shadow 0.3s, transform 0.3s;
  position: relative;
  overflow: hidden;
}

.next-post::before {
  content: '→';
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  color: var(--text-muted);
  opacity: 0.3;
  transition: transform 0.3s, opacity 0.3s;
}

.next-post:hover {
  box-shadow: var(--nm-inset);
  transform: translateY(1px);
}

.next-post:hover::before {
  transform: translateY(-50%) translateX(4px);
  opacity: 0.6;
}

.next-post-label {
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.next-post-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
  transition: color 0.2s;
  padding-right: 32px;
}

.next-post:hover .next-post-title {
  color: var(--category-color, var(--header));
}

/* --- Social Share --- */
.share-bar {
  display: flex;
  gap: 10px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border: none;
  border-radius: 100px;
  font-family: var(--font-meta);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--nm-bg);
  box-shadow: var(--nm-raised-sm);
  cursor: pointer;
  transition: box-shadow 0.25s, transform 0.2s, color 0.2s;
}

.share-btn:hover {
  color: var(--text);
  box-shadow: var(--nm-inset-sm);
  transform: translateY(1px);
}

.share-btn:active {
  box-shadow: var(--nm-inset);
  transform: translateY(2px);
}

.share-btn.copied {
  border-color: var(--cat-tech);
  color: var(--cat-tech);
}

/* --- Footer --- */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  font-family: var(--font-meta);
  font-size: 13px;
  letter-spacing: 0.3px;
  padding: 0;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 24px;
  text-align: left;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
  font-family: 'Playfair Display', Georgia, 'Times New Roman', serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--footer-text);
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--footer-muted);
  max-width: 280px;
}

.footer-newsletter-btn {
  display: inline-block;
  margin-top: 28px;
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--footer-text);
  border: 1px solid var(--footer-muted);
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.footer-newsletter-btn:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--footer-text);
}

.footer-heading {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--footer-text);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--footer-muted);
  font-size: 13px;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-social-heading {
  margin-top: 20px;
}

.footer-archive-year {
  list-style: none;
  margin-bottom: 2px;
}

.footer-archive-year + .footer-archive-year {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-archive-toggle {
  background: none;
  border: none;
  color: rgba(255,255,255,0.55);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 0;
  width: 100%;
  transition: color 0.15s;
}

.footer-archive-toggle:hover {
  color: rgba(255,255,255,0.9);
}

.footer-archive-count {
  display: inline-block;
  min-width: 20px;
  height: 20px;
  line-height: 20px;
  text-align: center;
  font-size: 11px;
  font-weight: 400;
  background: rgba(255,255,255,0.12);
  border-radius: 10px;
  margin-left: 5px;
  padding: 0 6px;
  color: rgba(255,255,255,0.7);
}

.footer-archive-arrow {
  width: 10px;
  height: 10px;
  margin-left: 4px;
  opacity: 0.35;
  transition: transform 0.2s, opacity 0.15s;
}

.footer-archive-toggle:hover .footer-archive-arrow {
  opacity: 0.7;
}

.footer-archive-year.open .footer-archive-arrow {
  transform: rotate(180deg);
}

.footer-archive-months {
  list-style: none;
  padding: 2px 0 4px 12px;
  margin: 0;
  border-left: 1px solid rgba(255,255,255,0.08);
  margin-left: 4px;
}

.footer-archive-months li {
  padding: 0;
}

.footer-archive-months a {
  font-size: 12px;
  display: flex;
  align-items: center;
  padding: 1px 0;
  color: rgba(255,255,255,0.5);
  transition: color 0.15s;
}

.footer-archive-months a:hover {
  color: rgba(255,255,255,0.9);
}

.footer-archive-months .footer-archive-count {
  min-width: 18px;
  height: 18px;
  line-height: 18px;
  font-size: 10px;
  margin-left: 4px;
  padding: 0 5px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 4px;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--footer-muted);
  transition: all 0.2s;
}

.footer-social a:hover {
  background: rgba(255,255,255,0.15);
  color: #FFFFFF;
}

.footer-social svg {
  width: 16px;
  height: 16px;
}

.footer-bottom {
  padding: 20px 24px;
  max-width: 1080px;
  margin: 0 auto;
  font-size: 12px;
  color: var(--footer-muted);
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-inner {
    padding: 40px 20px;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .footer-inner {
    padding: 32px 16px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
  .footer-newsletter-btn {
    font-size: 10px;
    max-width: 125px;
    text-align: center;
  }
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}

.empty-state p {
  font-size: 17px;
  margin-bottom: 16px;
}

.empty-state .links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.empty-state .links a {
  font-family: var(--font-meta);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition: border-color 0.2s;
}

.empty-state .links a:hover {
  border-color: var(--text);
}

/* --- About Page --- */
.about {
  max-width: 1080px;
  margin: 0 auto;
  padding: 64px 24px 80px;
  animation: postFadeIn 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
}

.about h1 {
  font-family: var(--font-en);
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 700;
  margin-bottom: 32px;
}

.about-intro {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 500;
  line-height: 2;
  margin-bottom: 0;
  padding: 32px 36px;
  background: var(--nm-bg);
  border-radius: 20px;
  box-shadow: var(--nm-inset);
  border-left: 3px solid var(--header);
  position: relative;
}

.about-intro::before {
  content: '"';
  position: absolute;
  top: 16px;
  left: 20px;
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 48px;
  font-weight: 700;
  color: var(--header);
  opacity: 0.15;
  line-height: 1;
}

/* Credential block */
.about-credential {
  padding: 20px 0 32px;
  border-top: 1px solid var(--border);
}

.about-credential p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

.about-credential strong {
  color: var(--text);
  font-weight: 700;
}

.about-credential .credential-tagline {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--header);
}

/* Promise section */
.about-promise {
  padding: 40px 0;
  border-top: none;
  opacity: 0;
  transform: translateY(12px);
  animation: sectionReveal 0.5s 0.2s ease forwards;
}

.about-promise + .about-promise {
  animation-delay: 0.35s;
}

.about-promise h2 {
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--header);
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--text);
  position: relative;
}

.about-promise h2::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--header);
}

.about-promise ul {
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about-promise li {
  list-style: none;
  font-size: 15px;
  line-height: 1.8;
  padding: 18px 24px;
  border-bottom: none;
  background: var(--nm-bg);
  border-radius: 16px;
  box-shadow: var(--nm-raised-sm);
  transition: box-shadow 0.25s, transform 0.2s;
}

.about-promise li:hover {
  box-shadow: var(--nm-inset-sm);
  transform: translateY(1px);
}

.about-promise li:last-child {
  border-bottom: none;
}

.about-promise li::before {
  content: "→ ";
  color: var(--header);
  font-weight: 700;
}

/* Toggle explainer */
.about-toggle {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.about-toggle h2 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 12px;
}

.about-toggle p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.toggle-example {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.toggle-example-row {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.toggle-example-row + .toggle-example-row {
  border-top: 1px solid var(--border);
}

.toggle-example-label {
  flex-shrink: 0;
  width: 72px;
  padding: 16px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.toggle-example-label.human {
  color: var(--text);
  border-right: 2px solid var(--text);
}

.toggle-example-label.ai {
  color: var(--ai);
  border-right: 2px solid var(--ai);
}

.toggle-example-text {
  padding: 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}

/* Newsletter CTA */
.about-cta {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.about-cta h2 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 8px;
}

.about-cta p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.about-cta-btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--text);
  color: var(--bg);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: opacity 0.2s;
}

.about-cta-btn:hover {
  opacity: 0.75;
}

.about-cta-note {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

/* Category guide */
.about-categories {
  padding: 40px 0;
  border-top: none;
  opacity: 0;
  transform: translateY(12px);
  animation: sectionReveal 0.5s 0.5s ease forwards;
}

.about-categories h2 {
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--header);
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--text);
  position: relative;
}

.about-categories h2::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--header);
}

.about-category-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.about-category-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 24px;
  border-bottom: none;
  text-decoration: none;
  color: var(--text);
  background: var(--nm-bg);
  border-radius: 16px;
  box-shadow: var(--nm-raised-sm);
  border-top: 3px solid var(--border);
  transition: box-shadow 0.25s, transform 0.2s, border-color 0.3s;
}

.about-category-item:nth-child(1) { border-top-color: var(--cat-research); }
.about-category-item:nth-child(2) { border-top-color: var(--cat-leader); }
.about-category-item:nth-child(3) { border-top-color: var(--cat-company); }
.about-category-item:nth-child(4) { border-top-color: var(--cat-tech); grid-column: 1 / 2; }
.about-category-item:nth-child(5) { border-top-color: var(--cat-survival); grid-column: 2 / 4; }

.about-category-item:last-child {
  border-bottom: none;
}

.about-category-item:hover {
  box-shadow: var(--nm-inset-sm);
  transform: translateY(1px);
  color: var(--text);
}

.about-category-name {
  font-size: 14px;
  font-weight: 800;
  min-width: 48px;
}

.about-category-item:nth-child(1) .about-category-name { color: var(--cat-research); }
.about-category-item:nth-child(2) .about-category-name { color: var(--cat-leader); }
.about-category-item:nth-child(3) .about-category-name { color: var(--cat-company); }
.about-category-item:nth-child(4) .about-category-name { color: var(--cat-tech); }
.about-category-item:nth-child(5) .about-category-name { color: var(--cat-survival); }

.about-category-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.about-category-item:hover .about-category-desc {
  color: var(--text);
}

/* Recent posts (dynamic, hidden until posts exist) */
.about-recent {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.about-recent h2 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 20px;
}

.about-recent-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-recent-card {
  display: block;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s;
}

.about-recent-card:hover {
  border-color: var(--text);
}

.about-recent-card .arc-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.about-recent-card .arc-cat {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--category-color, var(--cat-leader));
}

.about-recent-card .arc-date {
  font-size: 11px;
  color: var(--text-muted);
}

.about-recent-card .arc-title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 4px;
}

.about-recent-card .arc-summary {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Bottom CTA (nudge) */
.about-cta-bottom {
  margin-top: 48px;
  border-radius: 20px;
  background: var(--primary);
  padding: 36px 40px;
  box-shadow: var(--nm-raised);
}

.about-cta-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.about-cta-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.45);
  margin-bottom: 8px;
}

.about-cta-bottom p {
  font-size: 17px;
  font-weight: 700;
  margin: 0;
  line-height: 1.4;
  color: #fff;
}

.about-cta-btn-outline {
  flex-shrink: 0;
  display: inline-block;
  padding: 12px 28px;
  border: 1.5px solid rgba(255,255,255,0.5);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #fff;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
  white-space: nowrap;
}

.about-cta-btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
  transform: translateY(-1px);
}

@media (max-width: 600px) {
  .about-cta-bottom {
    padding: 24px 20px;
  }
  .about-cta-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}


/* --- AI View Extras (post page) --- */
.ai-view-section {
  display: none;
  margin: 24px 0;
  padding: 20px;
  background: var(--ai-surface);
  border-radius: var(--radius);
  border: 1px solid rgba(91, 79, 232, 0.15);
}

.ai-view-section.visible {
  display: block;
}

.ai-view-section .label {
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ai);
  margin-bottom: 8px;
}

.ai-view-section p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

/* --- Mobile Bottom Share Bar --- */
.mobile-share-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 12px 20px calc(12px + env(safe-area-inset-bottom));
  z-index: 100;
}

.mobile-share-bar .share-bar {
  margin: 0;
  padding: 0;
  border: none;
  flex-direction: row;
  gap: 8px;
  justify-content: center;
}

.mobile-share-bar .share-btn {
  flex: 1;
  justify-content: center;
  padding: 10px 4px;
  font-size: 13px;
}

/* --- Hamburger --- */
.hamburger {
  display: none;
  flex-direction: column;
  border: none;
  background: none;
  cursor: pointer;
  padding: 8px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Mobile Nav --- */
.mobile-nav {
  display: none;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.mobile-nav.open {
  display: block;
}

.mobile-nav a {
  display: block;
  font-family: var(--font-meta);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--text-muted);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-nav a:hover { color: var(--text); background: var(--surface-container); }

.mobile-search {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.mobile-search-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  outline: none;
  transition: border-color 0.2s;
}

.mobile-search-input:focus {
  border-color: var(--text-muted);
}

.mobile-search-input::placeholder {
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════ */

/* Tablet */
@media (max-width: 768px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: minmax(160px, auto);
    gap: 24px;
  }

  /* Bento: disable tall span on tablet */
  .card-grid .card:nth-child(7n) { grid-row: span 1; }

  .first-visit {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .nav-bar {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .search-btn {
    display: none;
  }

  .card-title {
    font-size: 18px;
  }

  .featured-hero {
    padding: 40px 28px 36px;
  }

  .featured-hero-title {
    font-size: clamp(28px, 7vw, 48px);
  }

  .site-logo {
    font-size: 16px;
    padding: 10px 18px;
  }

  .header-utils {
    gap: 12px;
  }

  .view-toggle button {
    padding: 5px 10px;
    font-size: 11px;
  }
}

/* Mobile */
@media (max-width: 480px) {
  .hide-mobile { display: none; }

  .container {
    padding: 0 16px;
  }

  .site-logo {
    font-size: 14px;
    padding: 8px 14px;
    letter-spacing: 1.5px;
  }

  .header-utils {
    gap: 8px;
  }

  .header-utils .about-link {
    font-size: 12px;
  }

  .search-btn {
    padding: 4px;
  }

  .view-toggle button {
    padding: 4px 8px;
    font-size: 10px;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card-grid .card:nth-child(1) { grid-column: span 1; }
  .card-grid .card:nth-child(7n) { grid-row: span 1; }

  .card {
    padding: 16px 16px 14px;
  }

  .card-title {
    font-size: 19px;
  }

  .featured-hero {
    padding: 32px 24px 28px;
  }

  .featured-hero-title {
    font-size: clamp(26px, 8vw, 36px);
  }

  .post {
    padding: 24px 16px 120px;
  }

  .post-thumbnail-overlay {
    padding: 0;
  }

  .post-thumbnail-overlay .post-title,
  .post-title {
    font-size: clamp(30px, 8vw, 40px);
  }

  .post-hero-meta,
  .post-hero-bottom,
  .post-hero-source,
  .post-hero-tags {
    text-align: left;
    align-items: flex-start;
    justify-content: flex-start;
  }

  .post-hero-source {
    flex-direction: column;
    gap: 4px;
  }

  .post-hero-source span + span::before {
    display: none;
  }

  .decision-role {
    text-align: left;
  }

  .footer-newsletter-brand {
    display: none;
  }

  .share-bar {
    flex-direction: row;
    gap: 8px;
  }

  .share-bar .share-btn {
    flex: 1;
    justify-content: center;
    padding: 10px 4px;
    font-size: 13px;
  }

  .mobile-share-bar {
    display: block;
  }

  .share-bar.desktop-only {
    display: none;
  }
}

/* ═══════════════════════════════════════════
   2단계 — Filter · Search · Series · Pagination
   ═══════════════════════════════════════════ */

/* --- Filter Bar (M3 Chips) --- */
.filter-bar {
  padding: 20px 0 16px;
  border-bottom: 1px solid var(--border-variant);
}

.filter-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  overflow-x: auto;
  overflow-y: visible;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 6px;
  padding-top: 4px;
}

.filter-tabs::-webkit-scrollbar {
  display: none;
}

/* Neumorphism Filter Chip */
.filter-tab {
  border: none;
  background: var(--nm-bg);
  box-shadow: 2px 2px 5px var(--nm-dark), -2px -2px 5px var(--nm-light);
  font-family: var(--font-meta);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 18px;
  border-radius: 100px;
  cursor: pointer;
  white-space: nowrap;
  transition: box-shadow 0.2s, color 0.2s, transform 0.2s;
}

.filter-tab:hover {
  box-shadow: 3px 3px 7px var(--nm-dark), -3px -3px 7px var(--nm-light);
  color: var(--text);
}

.filter-tab.active {
  box-shadow: inset 2px 2px 5px var(--nm-dark), inset -2px -2px 5px var(--nm-light);
  color: var(--text);
  font-weight: 700;
}

.filter-tab[data-category="research"].active { color: var(--cat-research); }
.filter-tab[data-category="leader"].active   { color: var(--cat-leader); }
.filter-tab[data-category="company"].active  { color: var(--cat-company); }
.filter-tab[data-category="tech"].active     { color: var(--cat-tech); }
.filter-tab[data-category="survival"].active { color: var(--cat-survival); }

.filter-pills-wrap {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.filter-pills {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  flex: 1;
  max-height: 66px;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 4px 4px 6px;
  margin: -4px -4px -6px;
}

.filter-pills.expanded {
  max-height: 1000px;
}

/* M3 Assist Chip — toggle */
.filter-pills-toggle {
  display: block;
  flex-shrink: 0;
  white-space: nowrap;
  border: 1px solid var(--border);
  background: none;
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 5px 10px;
  border-radius: 20px;
  cursor: pointer;
  margin-bottom: 2px;
  transition: background 0.15s, color 0.15s;
}

.filter-pills-toggle:hover {
  background: var(--border);
  color: var(--text);
}

/* Neumorphism Assist Chip — tag pill */
.filter-pill {
  border: none;
  background: var(--nm-bg);
  box-shadow: 2px 2px 5px var(--nm-dark), -2px -2px 5px var(--nm-light);
  font-family: var(--font-meta);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 7px 18px;
  border-radius: 100px;
  cursor: pointer;
  transition: box-shadow 0.2s, color 0.2s, transform 0.15s;
}

.filter-pill:hover {
  color: var(--text);
  box-shadow: 3px 3px 7px var(--nm-dark), -3px -3px 7px var(--nm-light);
  transform: translateY(-1px);
}

.filter-pill.active {
  box-shadow: inset 2px 2px 5px var(--nm-dark), inset -2px -2px 5px var(--nm-light);
  color: var(--text);
  font-weight: 600;
  transform: translateY(0);
}

/* --- Search Overlay --- */
.search-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 200;
  align-items: flex-start;
  justify-content: center;
  padding-top: 80px;
}

.search-overlay.open {
  display: flex;
}

.search-container {
  width: 100%;
  max-width: 640px;
  background: var(--nm-bg);
  border-radius: 20px;
  box-shadow: var(--nm-raised-lg);
  overflow: hidden;
  margin: 0 20px;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.search-input-wrap svg {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: 17px;
  color: var(--text);
  background: none;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-close {
  border: none;
  background: none;
  font-family: var(--font-meta);
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
}

.search-close:hover {
  background: var(--surface);
  color: var(--text);
}

.search-results {
  max-height: 400px;
  overflow-y: auto;
}

.search-result-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s, box-shadow 0.2s;
}

.search-result-card:hover {
  background: var(--nm-bg);
  box-shadow: var(--nm-inset-sm);
}

.search-result-title {
  flex: 1;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 800;
  color: var(--text);
}

.search-no-result {
  padding: 32px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
}

/* --- Search Button in Header --- */
.search-btn {
  border: none;
  background: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-muted);
  transition: color 0.2s;
  display: flex;
  align-items: center;
}

.search-btn:hover {
  color: var(--text);
}

.search-btn svg {
  width: 18px;
  height: 18px;
}

@media (max-width: 768px) {
  .search-btn {
    display: none;
  }
}

/* --- Series Badge (card) — M3 Suggestion Chip --- */
.card-series-badge {
  display: inline-block;
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1px;
  color: var(--ai);
  background: var(--ai-surface-alt);
  border: none;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 8px;
}

/* --- Series Badge (post page) --- */
.post-series-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-meta);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--ai);
  background: var(--ai-surface);
  padding: 6px 12px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.series-nav {
  margin-top: 24px;
  padding: 16px;
  background: var(--nm-bg);
  border-radius: 16px;
  box-shadow: var(--nm-raised-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.series-nav a {
  font-family: var(--font-meta);
  font-size: 13px;
  font-weight: 500;
  color: var(--ai);
  transition: opacity 0.2s;
}

.series-nav a:hover {
  opacity: 0.7;
}

.series-nav .series-label {
  font-family: var(--font-meta);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* --- Load More Button (Neumorphism) --- */
.load-more-wrap {
  text-align: center;
  padding: 32px 0;
}

.load-more-btn {
  display: none;
  border: none;
  background: var(--nm-bg);
  box-shadow: var(--nm-raised);
  font-family: var(--font-meta);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1px;
  color: var(--text-muted);
  padding: 12px 36px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.2s;
}

.load-more-btn:hover {
  box-shadow: var(--nm-raised-lg);
  color: var(--text);
  transform: translateY(-2px);
}

.load-more-btn:active {
  box-shadow: var(--nm-inset);
  transform: translateY(0);
}

/* ═══════════════════════════════════════════
   AI View — 까만 바탕 + 마크다운 원본
   ═══════════════════════════════════════════ */

/* AI 모드 전체 오버레이 */
.ai-md-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 300;
  background: #0D1117;
  color: #C9D1D9;
  font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.7;
  overflow-y: auto;
  padding: 0;
}

.ai-md-overlay.visible {
  display: block;
}

.ai-md-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #161B22;
  border-bottom: 1px solid #30363D;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1080px;
  margin: 0 auto;
}

.ai-md-header .ai-md-path {
  color: #58A6FF;
  font-size: 13px;
}

.ai-md-header .ai-md-close {
  background: none;
  border: 1px solid #30363D;
  color: #C9D1D9;
  font-family: inherit;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.ai-md-header .ai-md-close:hover {
  background: #30363D;
  color: #fff;
}

.ai-md-content {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.ai-md-content .md-line {
  display: flex;
  min-height: 24px;
}

.ai-md-content .line-num {
  color: #484F58;
  text-align: right;
  min-width: 36px;
  padding-right: 16px;
  user-select: none;
  flex-shrink: 0;
}

.ai-md-content .line-text {
  white-space: pre-wrap;
  word-break: break-word;
}

/* frontmatter (---) */
.ai-md-content .fm-delimiter {
  color: #F97583;
}

.ai-md-content .fm-key {
  color: #79C0FF;
}

.ai-md-content .fm-value {
  color: #A5D6FF;
}

/* headings (##) */
.ai-md-content .md-heading {
  color: #D2A8FF;
  font-weight: bold;
}

/* quote / roasting */
.ai-md-content .md-quote {
  color: #FFA657;
}

/* bold */
.ai-md-content .md-bold {
  color: #F0F6FC;
  font-weight: bold;
}

/* muted text */
.ai-md-content .md-muted {
  color: #484F58;
}

/* --- 2단계 Responsive additions --- */
@media (max-width: 768px) {
  .filter-tabs {
    padding-bottom: 4px;
  }

  .search-container {
    margin: 0 12px;
    border-radius: 8px;
  }
}

@media (max-width: 480px) {
  .filter-tab {
    font-size: 12px;
    padding: 6px 12px;
  }

  .search-overlay {
    padding-top: 40px;
  }
}

/* ═══════════════════════════════════════════
   Scroll Reveal
   ═══════════════════════════════════════════ */
.card, .featured-hero {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16,1,0.3,1),
              transform 0.6s cubic-bezier(0.16,1,0.3,1),
              box-shadow 0.25s cubic-bezier(0.2,0,0,1);
}

.card.revealed, .featured-hero.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* stagger: nth cards get a slight delay */
.card:nth-child(3n+2) { transition-delay: 0.07s; }
.card:nth-child(3n+3) { transition-delay: 0.14s; }

/* ═══════════════════════════════════════════
   Reading Progress Bar
   ═══════════════════════════════════════════ */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--border-variant);
  z-index: 9999;
  pointer-events: none;
}
.reading-progress-fill {
  height: 100%;
  background: var(--category-color, var(--cat-leader));
  width: 0%;
  transition: width 0.08s linear;
  box-shadow: 0 0 8px var(--category-color, var(--cat-leader));
}
[data-category="research"] .reading-progress-fill,
.post[data-category="research"] ~ .reading-progress-bar .reading-progress-fill { background: var(--cat-research); }
[data-category="leader"] .reading-progress-fill,
.post[data-category="leader"] ~ .reading-progress-bar .reading-progress-fill { background: var(--cat-leader); }
[data-category="company"] .reading-progress-fill,
.post[data-category="company"] ~ .reading-progress-bar .reading-progress-fill { background: var(--cat-company); }
[data-category="tech"] .reading-progress-fill,
.post[data-category="tech"] ~ .reading-progress-bar .reading-progress-fill { background: var(--cat-tech); }
[data-category="survival"] .reading-progress-fill,
.post[data-category="survival"] ~ .reading-progress-bar .reading-progress-fill { background: var(--cat-survival); }

/* ═══════════════════════════════════════════
   Post Body Layout (Content + TOC)
   ═══════════════════════════════════════════ */
.post-body-layout {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}
.post-body {
  flex: 1;
  min-width: 0;
}
@media (max-width: 959px) {
  .post-body-layout {
    display: block;
  }
}

/* ═══════════════════════════════════════════
   TOC Sidebar (Desktop) + FAB (Mobile)
   ═══════════════════════════════════════════ */
.toc-sidebar {
  position: sticky;
  top: 24px;
  width: 180px;
  flex-shrink: 0;
  display: none;
  padding: 16px 0 16px 0;
}
@media (min-width: 960px) {
  .toc-sidebar { display: block; }
}
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 2px solid var(--border, #E8E8E8);
}
.toc-list li {
  margin: 0;
}
.toc-link {
  display: block;
  padding: 6px 0 6px 12px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s, border-color 0.2s;
  border-left: 2px solid transparent;
  margin-left: -2px;
  word-break: keep-all;
}
.toc-link:hover,
.toc-link.active {
  color: var(--text);
  border-left-color: var(--text);
  font-weight: 600;
}

.toc-fab {
  display: none;
  position: fixed;
  bottom: 80px;
  right: 16px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--nm-bg);
  color: var(--text);
  border: none;
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  z-index: 102;
  box-shadow: var(--nm-raised);
  opacity: 0;
  transition: opacity 0.3s ease, box-shadow 0.25s, transform 0.2s;
  pointer-events: none;
}

.toc-fab:hover {
  box-shadow: var(--nm-inset);
  transform: scale(0.96);
}
@media (max-width: 959px) {
  .toc-fab { display: block; }
}
.toc-mobile-overlay {
  display: none;
  position: fixed;
  bottom: 140px;
  right: 16px;
  background: var(--nm-bg);
  border-radius: 20px;
  padding: 16px;
  z-index: 101;
  box-shadow: var(--nm-raised-lg);
  min-width: 180px;
}
.toc-mobile-overlay.open {
  display: block;
}
.toc-mobile-overlay .toc-list {
  border-left: 2px solid var(--border);
}
.toc-mobile-overlay .toc-link {
  font-size: 0.8rem;
  padding: 8px 0 8px 12px;
}

/* ═══════════════════════════════════════════
   Prompt Copy Button
   ═══════════════════════════════════════════ */
.prompt-block {
  position: relative;
  background: var(--nm-bg);
  box-shadow: var(--nm-raised-sm);
  border-radius: 16px;
  padding: 1rem;
  margin: 1rem 0;
}
.prompt-text {
  margin: 0;
  padding-right: 50px;
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: calc(0.9rem - 1px);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: keep-all;
}
.copy-prompt-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--text);
  color: var(--bg);
  border: none;
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
}
.copy-prompt-btn:hover {
  background: var(--text-muted);
}

/* Post Figure */
.post-figure {
  margin: 24px 0;
}
.post-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}
.post-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  font-family: 'Pretendard', -apple-system, 'system-ui', sans-serif;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ═══════════════════════════════════════════
   Theme Toggle
   ═══════════════════════════════════════════ */
.theme-toggle {
  border: none;
  background: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-muted);
  transition: color 0.2s;
  display: flex;
  align-items: center;
}
.theme-toggle:hover { color: var(--text); }
.theme-toggle svg { width: 20px; height: 20px; }
.theme-icon-sun { display: none; }
.theme-icon-moon { display: block; }
[data-theme="dark"] .theme-icon-sun { display: block; }
[data-theme="dark"] .theme-icon-moon { display: none; }

/* ═══════════════════════════════════════════
   Footer AI View Toggle
   ═══════════════════════════════════════════ */
.footer-ai-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 16px;
}
.footer-ai-toggle .footer-ai-label {
  font-size: 11px;
  color: var(--footer-muted);
  letter-spacing: 0.5px;
}
.footer-view-toggle {
  display: inline-flex;
  border: 1px solid var(--footer-muted);
  border-radius: 4px;
  overflow: hidden;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
}
.footer-view-toggle button {
  border: none;
  background: none;
  padding: 4px 10px;
  cursor: pointer;
  color: var(--footer-muted);
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  transition: all 0.2s;
}
.footer-view-toggle button.active {
  background: rgba(255,255,255,0.88);
  color: var(--footer-bg);
}
.footer-view-toggle button[data-view="ai"].active {
  background: var(--ai);
  color: #fff;
}

/* ═══════════════════════════════════════════
   Dark Mode
   ═══════════════════════════════════════════ */
:root[data-theme="dark"] {
  --bg:                     #2A2825;
  --surface:                #2A2825;
  --surface-container-low:  #2A2825;
  --surface-container:      #2A2825;
  --surface-container-high: #2E2B28;
  --border:                 #49454F;
  --border-variant:         #332F3A;
  --text:                   #E6E0EC;
  --text-muted:             #CAC4D0;
  --text-secondary:         #ABA5B5;
  --primary:                #BACBF8;
  --on-primary:             #0F2878;
  --header: #BFA070;
  /* --ai stays #5B4FE8 */
  --cat-research-surface: #2A1F18;
  --cat-leader-surface:   #2C1A10;
  --cat-company-surface:  #141E2E;
  --cat-tech-surface:     #142418;
  --cat-survival-surface: #2A1616;
  --cat-research: #D4A090;
  --cat-leader:   #FFB59A;
  --cat-company:  #9ABEF5;
  --cat-tech:     #72D9A0;
  --cat-survival: #F4A8A8;
  /* Neumorphism dark */
  --nm-bg:        #2A2825;
  --nm-dark:      #141210;
  --nm-light:     #3A3735;
  --nm-raised:    6px 6px 14px #141210, -6px -6px 14px #3A3735;
  --nm-raised-sm: 4px 4px 10px #141210, -4px -4px 10px #3A3735;
  --nm-raised-lg: 8px 8px 20px #141210, -8px -8px 20px #3A3735;
  --nm-inset:     inset 6px 6px 14px #141210, inset -6px -6px 14px #3A3735;
  --nm-inset-sm:  inset 2px 2px 6px #141210, inset -2px -2px 6px #3A3735;
  --shadow-1: var(--nm-raised-sm);
  --shadow-2: var(--nm-raised);
  --shadow-3: var(--nm-raised-lg);
  --primary-dark: #0D1520;
}

/* Neumorphism dark mode — body + key surfaces */
[data-theme="dark"] body {
  background: var(--nm-bg);
}
[data-theme="dark"] .card,
[data-theme="dark"] .card[data-category="research"],
[data-theme="dark"] .card[data-category="leader"],
[data-theme="dark"] .card[data-category="company"],
[data-theme="dark"] .card[data-category="tech"],
[data-theme="dark"] .card[data-category="survival"] {
  background: var(--nm-bg);
}
[data-theme="dark"] .featured-hero,
[data-theme="dark"] .featured-hero[data-hero-cat="research"],
[data-theme="dark"] .featured-hero[data-hero-cat="leader"],
[data-theme="dark"] .featured-hero[data-hero-cat="company"],
[data-theme="dark"] .featured-hero[data-hero-cat="tech"],
[data-theme="dark"] .featured-hero[data-hero-cat="survival"] {
  background: var(--nm-bg);
}
[data-theme="dark"] .load-more-btn,
[data-theme="dark"] .filter-tab,
[data-theme="dark"] .filter-pill,
[data-theme="dark"] .skeleton-card {
  background: var(--nm-bg);
}
[data-theme="dark"] .featured-hero-cta {
  background: none;
  color: var(--cat-leader);
  border-bottom-color: var(--cat-leader);
}
[data-theme="dark"] .post-count {
  background: var(--nm-bg);
}

/* Logo — dark mode에서 배경보다 약간 밝은 색 적용 */
[data-theme="dark"] .site-logo {
  background: #363330;
  color: #E8ECF2;
}
[data-theme="dark"] .site-logo:hover {
  background: #3E3B38;
  color: #fff;
}

/* Nav bar border */
[data-theme="dark"] .nav-bar {
  border-top-color: var(--border);
}

/* Card fallback (thumbnail removed, kept for legacy post pages) */
[data-theme="dark"] .card-thumb.no-image {
  background: linear-gradient(135deg, #1E1E1E 0%, #2A2A2A 100%);
}
[data-theme="dark"] .card-thumb.no-image::after {
  color: #555;
}

/* Source tags */
[data-theme="dark"] .card-source-tag {
  background: rgba(255,255,255,0.08);
  color: var(--text-muted);
}

/* Card/hero category tints — dark mode (uses --cat-*-surface tokens from :root[data-theme="dark"]) */

/* Featured hero dark */
[data-theme="dark"] .featured-hero {
  border-bottom-color: var(--text);
}

/* AI banner */
[data-theme="dark"] .ai-banner {
  background: #1E1A3A;
}

/* Series badge */
[data-theme="dark"] .card-series-badge {
  background: rgba(91,79,232,0.18);
  border: none;
}
[data-theme="dark"] .post-series-badge {
  background: #1E1A3A;
}

/* AI view section */
[data-theme="dark"] .ai-view-section {
  background: #1E1A3A;
  border-color: rgba(91, 79, 232, 0.3);
}

/* Decision points */
[data-theme="dark"] .decision-points {
  border-top-color: var(--border);
}
[data-theme="dark"] .decision-point {
  border-bottom-color: var(--border);
}
[data-theme="dark"] .decision-point:nth-child(1) { background: var(--nm-bg); }
[data-theme="dark"] .decision-point:nth-child(2) { background: var(--nm-bg); }
[data-theme="dark"] .decision-point:nth-child(3) { background: var(--nm-bg); }

/* Prompt block */
[data-theme="dark"] .prompt-block {
  background: var(--nm-bg);
}
[data-theme="dark"] .copy-prompt-btn {
  background: #E0E0E0;
  color: #111;
}
[data-theme="dark"] .copy-prompt-btn:hover {
  background: #fff;
}

/* TOC */
[data-theme="dark"] .toc-link {
  color: #777;
}
[data-theme="dark"] .toc-link:hover,
[data-theme="dark"] .toc-link.active {
  color: #E0E0E0;
  border-left-color: #E0E0E0;
}
[data-theme="dark"] .toc-fab {
  background: var(--nm-bg);
  color: var(--text);
  box-shadow: var(--nm-raised-sm);
}
[data-theme="dark"] .toc-mobile-overlay {
  background: var(--nm-bg);
  border-color: transparent;
}
[data-theme="dark"] .toc-mobile-overlay .toc-list {
  border-left-color: var(--border);
}

/* Filter tab active (white text already set, just tweak) */
[data-theme="dark"] .filter-tab.active { color: #fff; }
[data-theme="dark"] .filter-pill.active { color: #fff; }
[data-theme="dark"] .filter-pills-toggle { border-color: var(--border); color: var(--text-muted); }
[data-theme="dark"] .filter-pills-toggle:hover { background: var(--border); color: var(--text); }

/* Card category shadows — dark mode: nm 변수 사용 */
[data-theme="dark"] .card[data-category="research"],
[data-theme="dark"] .card[data-category="leader"],
[data-theme="dark"] .card[data-category="company"],
[data-theme="dark"] .card[data-category="tech"],
[data-theme="dark"] .card[data-category="survival"] { box-shadow: var(--nm-raised); }

[data-theme="dark"] .card[data-category="research"]:hover,
[data-theme="dark"] .card[data-category="leader"]:hover,
[data-theme="dark"] .card[data-category="company"]:hover,
[data-theme="dark"] .card[data-category="tech"]:hover,
[data-theme="dark"] .card[data-category="survival"]:hover { box-shadow: var(--nm-raised-lg); transform: translateY(-3px); }

/* Reading progress — leader dark variant */
[data-theme="dark"] [data-category="leader"] .reading-progress-fill,
[data-theme="dark"] .post[data-category="leader"] ~ .reading-progress-bar .reading-progress-fill {
  background: #E45520;
}

/* Featured hero — legacy no-image gradient (kept for compatibility) */
[data-theme="dark"] .featured-hero-image.no-image {
  background: linear-gradient(135deg, #0D1520 0%, #1B2A4A 100%);
}

/* About CTA bottom */
[data-theme="dark"] .about-cta-bottom {
  background: var(--primary-dark);
}

/* Post count */
[data-theme="dark"] .post-count { color: var(--text-secondary); }

/* Footer — already dark, minimal adjustment */
[data-theme="dark"] .site-footer {
  background: #0A0A0A;
}

/* Post figure caption */
[data-theme="dark"] .post-figure figcaption {
  color: #777;
}

/* Skeleton */
[data-theme="dark"] .skeleton-card {
  border-color: #333;
}
[data-theme="dark"] .skeleton-line {
  background: linear-gradient(90deg, #1E1E1E 25%, #333 50%, #1E1E1E 75%);
  background-size: 200% 100%;
}