/* AI × Series · Web Magazine */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable.min.css');
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@400;700;900&family=Playfair+Display:ital,wght@0,700;0,800;1,700;1,800&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* 브라우저 자동 다크모드 강제 무력화 (Samsung Internet · Chrome Android) */
:root { color-scheme: light only; }
html { color-scheme: light only; }

:root {
  --bg: #f4efe4;
  --bg-soft: #faf6ec;
  --navy: #0f1e38;
  --navy-deep: #1c2e4e;
  --brand: #E35205;
  --brand-deep: #B5400B;
  --brand-soft: #FFE4D0;
  --ink: #0f172a;
  --ink-soft: #243244;
  --ink-mid: #5c6578;
  --line: rgba(15,30,56,0.1);
  --line-strong: rgba(15,30,56,0.18);

  --shell-max: 1440px;
  --shell-pad: clamp(24px, 4vw, 48px);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  font-family: 'Pretendard Variable', Pretendard, 'Noto Sans KR', sans-serif;
  background: var(--bg); color: var(--navy);
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.012em;
}
body { min-height: 100vh; }
body.reader { padding-bottom: 120px; } /* space for fixed reader-bar */
a { color: inherit; text-decoration: none; }
em { font-style: normal; color: var(--brand); font-weight: 800; }
/* 진한 brand-bg(hex 직접 지정) 박스 안 em orange-on-orange 방어 */
[style*="E35205"] em,
[style*="B5400B"] em {
  color: #FFE4D0 !important;
  font-weight: 700;
}
/* Korean brand accent — keeps Pretendard, just brand color */
.brand-ko { color: var(--brand); font-weight: 900; font-family: inherit; font-style: normal; }

.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(244, 239, 228, 0.88);
  backdrop-filter: blur(14px) saturate(1.1);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  border-bottom: 1px solid var(--line);
}
.site-nav-inner {
  max-width: var(--shell-max); margin: 0 auto;
  padding: 16px var(--shell-pad);
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
}
.site-nav .logo {
  font-family: 'Playfair Display', serif; font-style: italic; font-weight: 700;
  font-size: 22px; color: var(--navy);
  display: inline-flex; align-items: baseline; gap: 2px;
  line-height: 1;
}
.site-nav .logo em { font-style: italic; color: var(--brand); }
.site-nav .nav-right {
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  letter-spacing: 0.22em; color: var(--ink-mid); text-transform: uppercase; font-weight: 700;
  white-space: nowrap;
}

/* ====== HOME ====== */
.hero-home {
  position: relative;
  max-width: var(--shell-max); margin: 0 auto;
  padding: clamp(64px, 10vw, 120px) var(--shell-pad) clamp(48px, 7vw, 80px);
}
.hero-home > div { max-width: 920px; }

/* Brand eyebrow: ▲ + label, spaced with thin rule */
.hero-home .eyebrow {
  display: inline-flex; align-items: center; gap: 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px; letter-spacing: 0.32em;
  color: var(--brand); font-weight: 700; text-transform: uppercase;
}
.hero-home .eyebrow::before {
  content: ""; width: 28px; height: 2px; background: var(--brand);
  display: inline-block;
}

.hero-home h1 {
  margin-top: 28px;
  font-size: clamp(56px, 9vw, 108px);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: -0.042em;
  text-wrap: balance;
  color: var(--navy);
}
.hero-home h1 em {
  font-family: 'Playfair Display', serif; font-style: italic; font-weight: 700;
}

.hero-home .lead {
  margin-top: clamp(20px, 2.2vw, 32px);
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.68;
  color: var(--ink-soft);
  max-width: 640px;
  text-wrap: pretty;
}
.hero-home .lead em { background: linear-gradient(transparent 70%, var(--brand-soft) 70%); padding: 0 2px; }

/* Byline: magazine-style credit — "WRITTEN BY" on a thin rule, name bold */
.hero-home .byline {
  margin-top: clamp(28px, 3vw, 40px);
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; letter-spacing: 0.3em;
  color: var(--ink-mid); text-transform: uppercase; font-weight: 600;
}
.hero-home .byline b {
  color: var(--navy);
  font-weight: 800;
  font-family: 'Pretendard Variable', sans-serif;
  text-transform: none;
  letter-spacing: -0.01em;
  font-size: 15px;
  line-height: 1;
}
.hero-home .byline b::before {
  content: ""; display: inline-block;
  width: 4px; height: 4px; margin-right: 10px; transform: translateY(-3px);
  background: var(--brand); border-radius: 50%;
}

/* Section-title: headline + count + rule on the right */
.section-title {
  max-width: var(--shell-max); margin: clamp(40px, 5vw, 72px) auto 28px;
  padding: 0 var(--shell-pad);
  display: grid; grid-template-columns: auto 1fr auto;
  align-items: end; gap: 24px;
}
.section-title h2 {
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 900; letter-spacing: -0.028em; line-height: 1;
  color: var(--navy);
}
.section-title h2 em { font-family: 'Playfair Display', serif; font-style: italic; font-weight: 700; color: var(--brand); }
.section-title .rule {
  height: 1px; background: var(--line);
  margin-bottom: 10px;
}
.section-title .count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.26em;
  color: var(--ink-mid); text-transform: uppercase; font-weight: 700;
  white-space: nowrap;
  padding-bottom: 2px;
}
.section-title .count b {
  color: var(--brand); font-weight: 800;
}

/* ---------- Index controls (view / sort / filter) ---------- */
.index-controls {
  max-width: var(--shell-max); margin: 0 auto;
  padding: 0 var(--shell-pad) 18px;
  display: flex; flex-direction: column; gap: 12px;
}
.control-row {
  display: flex; gap: 24px; flex-wrap: wrap; align-items: center;
}
.control-row.tags-row { gap: 14px; }
.control-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.28em; color: var(--ink-mid);
  text-transform: uppercase; font-weight: 700;
}
.control-group { display: flex; align-items: center; gap: 10px; }

.seg {
  display: inline-flex; border: 1px solid var(--line);
  background: #fff;
}
.seg-btn {
  border: none; background: transparent;
  padding: 7px 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.14em;
  color: var(--ink-mid); font-weight: 600;
  cursor: pointer;
  border-right: 1px solid var(--line);
  transition: color 0.15s ease, background 0.15s ease;
}
.seg-btn:last-child { border-right: none; }
.seg-btn:hover { color: var(--navy); }
.seg-btn.active {
  background: var(--navy); color: #fff;
}

.tag-chips {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.chip {
  border: 1px solid var(--line);
  background: #fff;
  padding: 6px 12px;
  font-family: 'Pretendard Variable', sans-serif;
  font-size: 12px; color: var(--ink-mid);
  cursor: pointer;
  border-radius: 999px;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.chip:hover { color: var(--navy); border-color: var(--line-strong); }
.chip.active {
  background: var(--brand); color: #fff; border-color: var(--brand);
}

/* ---------- Single mode navigation ---------- */
.single-nav {
  max-width: var(--shell-max); margin: 0 auto 40px;
  padding: 0 var(--shell-pad);
  display: flex; align-items: center; justify-content: center; gap: 28px;
}
.single-arrow {
  width: 48px; height: 48px; border-radius: 50%;
  border: 1px solid var(--line);
  background: #fff; color: var(--navy);
  font-size: 22px; font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.single-arrow:hover { background: var(--brand); color: #fff; border-color: var(--brand); }
.single-counter {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; letter-spacing: 0.22em; color: var(--ink-mid);
  font-weight: 700; text-transform: uppercase;
}
.single-counter b {
  color: var(--brand); font-size: 16px; font-weight: 800;
  font-family: 'Pretendard Variable', sans-serif; letter-spacing: -0.01em;
}
.single-counter .slash { margin: 0 6px; opacity: 0.5; }

.series-grid {
  max-width: var(--shell-max); margin: 0 auto;
  padding: 0 var(--shell-pad) clamp(80px, 10vw, 140px);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 2.2vw, 36px);
}

/* Hidden by tag filter */
.series-card.hidden-by-filter { display: none !important; }

/* List view — 글씨만 있는 제목 리스트 (썸네일·이미지 없이) */
.series-grid.view-list {
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}
.series-grid.view-list .series-card {
  flex-direction: row;
  align-items: baseline;
  padding: 16px 8px;
  background: transparent;
  box-shadow: none;
  border-bottom: 1px solid var(--line);
  transition: background 0.15s ease;
}
.series-grid.view-list .series-card:hover {
  background: rgba(227,82,5,0.05);
  transform: none;
  box-shadow: none;
}
.series-grid.view-list .series-card::before { display: none; }
.series-grid.view-list .thumb { display: none; }
.series-grid.view-list .body {
  border-top: none;
  padding: 0;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 20px;
  align-items: baseline;
  width: 100%;
}
.series-grid.view-list .tag {
  font-family: 'JetBrains Mono', monospace;
  color: var(--brand);
  font-size: 11px; letter-spacing: 0.22em;
  align-self: baseline;
}
.series-grid.view-list .tag::after { display: none; }
.series-grid.view-list h3 {
  margin-top: 0;
  font-size: 17px;
  line-height: 1.3;
  font-weight: 800;
  display: inline;
}
.series-grid.view-list .body > div:nth-child(2) {
  display: block;
}
.series-grid.view-list .subt {
  display: inline;
  margin-top: 0;
  font-weight: 500;
  color: var(--ink-mid);
  font-size: 14px;
  letter-spacing: -0.008em;
}
.series-grid.view-list .subt::before { content: " — "; }
.series-grid.view-list .desc,
.series-grid.view-list .cue { display: none; }

/* Single view — 1-column grid: cards stacked large, one per row */
.series-grid.view-single {
  grid-template-columns: 1fr;
  max-width: 720px;
  gap: clamp(24px, 3vw, 40px);
}
.series-grid.view-single .series-card .thumb {
  aspect-ratio: 1/1;
}
.series-grid.view-single .series-card h3 {
  font-size: clamp(28px, 3vw, 36px);
}

@media (max-width: 760px) {
  .index-controls {
    padding: 0 20px 14px;
  }
  .control-row { gap: 14px; }
  .seg-btn { padding: 6px 10px; font-size: 10px; letter-spacing: 0.1em; }
  .chip { font-size: 11.5px; padding: 5px 10px; }
  .series-grid.view-list .series-card {
    padding: 12px 8px;
  }
  .series-grid.view-list .body {
    grid-template-columns: 54px 1fr;
    gap: 10px;
    align-items: center;
  }
  .series-grid.view-list .tag {
    font-size: 10px;
    letter-spacing: 0.16em;
  }
  .series-grid.view-list .body > div:nth-child(2) {
    min-width: 0;
    overflow: hidden;
  }
  .series-grid.view-list h3 {
    font-size: 13.5px;
    line-height: 1.25;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .series-grid.view-list .subt { display: none; }
}

/* ---------- Series Card — refined ---------- */
.series-card {
  position: relative;
  display: flex; flex-direction: column;
  background: #fff;
  overflow: hidden;
  isolation: isolate;
  box-shadow:
    0 1px 0 0 rgba(15,30,56,0.04),
    0 20px 40px -28px rgba(15,30,56,0.18);
  transition:
    transform 0.4s var(--ease-out-quart),
    box-shadow 0.4s var(--ease-out-quart);
}
/* Hair-thin brand edge on the left — appears only on hover */
.series-card::before {
  content: ""; position: absolute; z-index: 3;
  left: 0; top: 0; bottom: 0; width: 2px;
  background: var(--brand);
  transform: scaleY(0); transform-origin: top;
  transition: transform 0.5s var(--ease-out-quart);
}
.series-card:hover {
  transform: translateY(-6px);
  box-shadow:
    0 2px 0 0 rgba(15,30,56,0.05),
    0 40px 72px -32px rgba(15,30,56,0.32);
}
.series-card:hover::before { transform: scaleY(1); }
.series-card:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 4px;
}

.series-card .thumb {
  position: relative;
  width: 100%; aspect-ratio: 1/1;
  background: var(--bg);
  overflow: hidden;
}
.series-card .thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.01);
  transition: transform 0.7s var(--ease-out-quart), filter 0.5s ease;
}
.series-card:hover .thumb img {
  transform: scale(1.045);
}

/* Hanja overlay — upgraded from static to a deliberate watermark */
.series-card .thumb .hanja {
  position: absolute; right: 22px; top: 18px;
  font-family: 'Noto Serif KR', serif; font-weight: 900;
  font-size: clamp(64px, 6vw, 92px);
  color: var(--brand);
  opacity: 0.18;
  line-height: 1;
  text-shadow: 0 2px 8px rgba(227,82,5,0.15);
  transition: opacity 0.4s var(--ease-out-quart), transform 0.5s var(--ease-out-quart);
  pointer-events: none;
}
.series-card:hover .thumb .hanja {
  opacity: 0.3;
  transform: translate(-4px, 4px);
}

.series-card .body {
  padding: 22px 24px 22px;
  border-top: 1px solid var(--line);
  display: flex; flex-direction: column;
  flex: 1;
}

.series-card .tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; letter-spacing: 0.24em;
  color: var(--brand); font-weight: 700; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 8px;
}
.series-card .tag::after {
  content: ""; flex: 0 0 auto;
  width: 14px; height: 1px;
  background: currentColor; opacity: 0.4;
  transform: translateX(0);
  transition: width 0.4s var(--ease-out-quart), opacity 0.3s ease;
}
.series-card:hover .tag::after {
  width: 28px; opacity: 0.8;
}

.series-card h3 {
  margin-top: 10px;
  font-size: clamp(22px, 1.9vw, 26px);
  font-weight: 900;
  letter-spacing: -0.022em;
  line-height: 1.12;
  color: var(--navy);
}
.series-card h3 em {
  font-family: 'Playfair Display', serif; font-style: italic; font-weight: 700;
}

.series-card .subt {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--ink-soft);
  line-height: 1.5;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
.series-card .desc {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--ink-mid);
  line-height: 1.66;
}

/* Read-more cue — appears on hover, ties the card to the action */
.series-card .cue {
  margin-top: auto;
  padding-top: 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--ink-mid); font-weight: 700;
  display: inline-flex; align-items: center; gap: 8px;
  opacity: 0; transform: translateY(6px);
  transition: opacity 0.4s var(--ease-out-quart), transform 0.4s var(--ease-out-quart), color 0.3s ease;
}
.series-card .cue::after {
  content: "→"; font-family: 'JetBrains Mono', monospace;
  transition: transform 0.35s var(--ease-out-quart);
}
.series-card:hover .cue {
  opacity: 1; transform: translateY(0);
  color: var(--brand);
}
.series-card:hover .cue::after { transform: translateX(4px); }

/* ====== FOOTER ====== */
.site-foot {
  max-width: var(--shell-max); margin: 0 auto;
  padding: clamp(36px, 4vw, 56px) var(--shell-pad) clamp(56px, 6vw, 80px);
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px;
  font-family: 'JetBrains Mono', monospace; font-size: 10.5px;
  letter-spacing: 0.22em; color: var(--ink-mid); text-transform: uppercase;
}
.site-foot span:first-child b {
  color: var(--brand); font-weight: 800;
  font-family: 'Playfair Display', serif; font-style: italic;
  font-size: 13px; letter-spacing: 0; text-transform: none;
  margin: 0 4px;
}

/* ====== ISSUE / SERIES DETAIL ====== */
.issue-head {
  max-width: 1440px; margin: 0 auto; padding: 60px 48px 40px;
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: end;
}
.issue-head .meta {
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  letter-spacing: 0.3em; color: var(--brand); text-transform: uppercase; font-weight: 700;
}
.issue-head h1 {
  margin-top: 14px;
  font-size: 64px; font-weight: 900; line-height: 1; letter-spacing: -0.035em;
}
.issue-head h1 em { font-family: 'Playfair Display', serif; font-style: italic; font-weight: 700; }
.issue-head .subt { margin-top: 14px; font-size: 18px; color: var(--ink-soft); line-height: 1.55; }
.issue-head .desc { font-size: 14px; line-height: 1.7; color: var(--ink-mid); }

/* ======= Flip-book / E-book viewer ======= */
.flipbook {
  position: relative;
  width: 100%;
  /* fill the viewport below the issue head */
  min-height: calc(100vh - 60px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px 72px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
}
/* Cards are authored at 1080×1080 so the viewport keeps 1:1, but
   it now maxes out to whichever dimension (width/height) is smaller,
   so it truly fills the available space. */
.flipbook .viewport {
  position: relative;
  width: min(calc(100vw - 160px), calc(100vh - 180px), 1080px);
  height: min(calc(100vw - 160px), calc(100vh - 180px), 1080px);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  box-shadow: 0 60px 120px -60px rgba(15,30,56,0.55),
              0 20px 40px -24px rgba(15,30,56,0.25);
  overflow: hidden;
  perspective: 2200px;
  perspective-origin: 50% 50%;
}
/* Subtle page seam in the middle — spine illusion */
.flipbook .viewport::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%;
  width: 1px; background: linear-gradient(180deg, transparent 0%, rgba(15,30,56,0.08) 20%, rgba(15,30,56,0.12) 50%, rgba(15,30,56,0.08) 80%, transparent 100%);
  z-index: 3; pointer-events: none;
}
.flipbook .slide {
  position: absolute; inset: 0;
  opacity: 0; pointer-events: none;
  transform: translateX(30px) scale(0.985);
  transition: opacity 0.45s ease, transform 0.55s cubic-bezier(0.2, 0.7, 0.2, 1);
  will-change: opacity, transform;
}
.flipbook .slide.active {
  opacity: 1; pointer-events: auto; z-index: 2;
  transform: translateX(0) scale(1);
}
/* outgoing forward (current → leaves to left) */
.flipbook .slide.turning-out {
  opacity: 0;
  transform: translateX(-40px) scale(0.985);
  z-index: 1; pointer-events: none;
}
/* outgoing backward (current → leaves to right) */
.flipbook .slide.turning-back-out {
  opacity: 0;
  transform: translateX(40px) scale(0.985);
  z-index: 1; pointer-events: none;
}
/* incoming backward (prev slides in from left) */
.flipbook .slide.turning-back-in {
  opacity: 0;
  transform: translateX(-30px) scale(0.985);
}
/* animated page-curl overlay element */
.flipbook .page-flip {
  position: absolute; top: 0; bottom: 0; width: 50%;
  background: linear-gradient(90deg, rgba(15,30,56,0.06) 0%, rgba(15,30,56,0.0) 100%);
  pointer-events: none; z-index: 4;
  transform-origin: left center;
  transform: perspective(1800px) rotateY(0deg);
  opacity: 0;
  transition: transform 0.6s cubic-bezier(0.65, 0.05, 0.35, 1), opacity 0.6s ease;
}
.flipbook .page-flip.left  { left: 0; }
.flipbook .page-flip.right { right: 0; transform-origin: right center; background: linear-gradient(270deg, rgba(15,30,56,0.06) 0%, rgba(15,30,56,0.0) 100%);}
.flipbook .page-flip.flip-fwd {
  opacity: 1;
  transform: perspective(1800px) rotateY(-165deg);
  background: linear-gradient(90deg, rgba(15,30,56,0.14) 0%, rgba(15,30,56,0.0) 100%);
  box-shadow: 4px 0 18px rgba(15,30,56,0.25);
}
.flipbook .page-flip.flip-back {
  opacity: 1;
  transform: perspective(1800px) rotateY(165deg);
  background: linear-gradient(270deg, rgba(15,30,56,0.14) 0%, rgba(15,30,56,0.0) 100%);
  box-shadow: -4px 0 18px rgba(15,30,56,0.25);
}
.flipbook .slide img {
  width: 100%; height: 100%; object-fit: contain; display: block;
  background: #f4efe4;
}
/* Iframe-based live cards: scale 1080×1080 source to fill the viewport */
.flipbook .slide iframe {
  border: 0;
  width: 1080px; height: 1080px;
  position: absolute;
  transform-origin: top left;
  background: #f4efe4;
}

/* End-card: next issue promo */
.flipbook .end-card {
  background: linear-gradient(135deg, #0f1e38, #1c2e4e);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
}
.flipbook .end-card-inner {
  max-width: 78%; text-align: center;
  padding: 40px;
  display: flex; flex-direction: column; align-items: center; gap: 16px;
}
.flipbook .end-kicker {
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  letter-spacing: 0.3em; color: var(--brand-soft); font-weight: 700; text-transform: uppercase;
}
.flipbook .end-cover {
  width: 45%; max-width: 240px; aspect-ratio: 1/1;
  border: 2px solid var(--brand);
  box-shadow: 0 30px 50px -30px rgba(227,82,5,0.6);
  background: var(--bg); object-fit: cover;
}
.flipbook .end-title {
  font-size: 42px; font-weight: 900; letter-spacing: -0.03em; line-height: 1.1;
  margin-top: 8px;
}
.flipbook .end-title em {
  font-family: 'Playfair Display', serif; font-style: italic;
  color: var(--brand-soft); font-weight: 700;
}
.flipbook .end-sub {
  font-size: 16px; color: rgba(255, 228, 208, 0.88); line-height: 1.55;
  max-width: 520px;
}
.flipbook .end-cta {
  margin-top: 10px;
  display: inline-block; padding: 14px 28px;
  background: var(--brand); color: #fff;
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  font-weight: 700; letter-spacing: 0.22em; text-transform: uppercase;
  border: 2px solid var(--brand);
  transition: background 0.2s ease, transform 0.15s ease;
}
.flipbook .end-cta:hover {
  background: transparent; color: var(--brand-soft);
}
.flipbook .end-cta:active { transform: translateY(1px); }
@media (max-width: 600px) {
  .flipbook .end-title { font-size: 30px; }
  .flipbook .end-cover { width: 55%; }
}

/* Floating arrow buttons on the sides */
.flipbook button.turn {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  width: 52px; height: 52px; border-radius: 50%;
  background: #fff; color: var(--navy); border: 1px solid var(--line);
  font-family: 'JetBrains Mono', monospace; font-size: 22px; font-weight: 700;
  cursor: pointer;
  box-shadow: 0 12px 28px -12px rgba(15,30,56,0.35);
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
  z-index: 5;
}
.flipbook button.turn.prev-btn { left: 16px; }
.flipbook button.turn.next-btn { right: 16px; }
.flipbook button.turn:hover:not(:disabled) {
  background: var(--brand); color: #fff; border-color: var(--brand);
}
.flipbook button.turn:active:not(:disabled) { transform: translateY(-48%); }
.flipbook button.turn:disabled { opacity: 0; pointer-events: none; }

/* Bottom counter + thumbs drawer */
.flipbook .reader-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
  background: rgba(250, 246, 236, 0.94);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  padding: 10px 24px 12px;
  display: flex; flex-direction: column; align-items: stretch; gap: 8px;
}
.flipbook .reader-bar .meta-row {
  display: flex; align-items: center; justify-content: space-between;
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  letter-spacing: 0.22em; color: var(--ink-mid); text-transform: uppercase;
}
.flipbook .reader-bar .meta-row .counter {
  font-size: 12px; letter-spacing: 0.26em;
}
.flipbook .reader-bar .meta-row .counter b {
  font-family: 'Pretendard Variable', sans-serif;
  font-size: 18px; color: var(--navy); font-weight: 900; letter-spacing: -0.01em;
}
.flipbook .reader-bar .thumbs-toggle {
  background: none; border: none; cursor: pointer;
  font-family: inherit; font-size: 11px; letter-spacing: 0.22em; color: var(--ink-mid);
  font-weight: 700; text-transform: uppercase;
  padding: 6px 10px;
}
.flipbook .reader-bar .thumbs-toggle:hover { color: var(--brand); }

/* Progress bar */
.flipbook .progress {
  height: 2px; background: rgba(15,30,56,0.08); position: relative;
}
.flipbook .progress .fill {
  height: 100%; background: var(--brand);
  transition: width 0.35s ease;
}

/* Thumbnails drawer (hidden by default) */
.flipbook .thumbs {
  display: none;
  gap: 8px; overflow-x: auto; padding: 8px 0 4px;
  scrollbar-width: thin;
}
.flipbook .thumbs.open { display: flex; }
.flipbook .thumbs::-webkit-scrollbar { height: 6px; }
.flipbook .thumbs::-webkit-scrollbar-track { background: rgba(15,30,56,0.05); }
.flipbook .thumbs::-webkit-scrollbar-thumb { background: var(--ink-mid); }
.flipbook .thumb {
  flex: 0 0 72px; aspect-ratio: 1/1;
  border: 2px solid transparent;
  background: #fff;
  cursor: pointer; overflow: hidden;
  opacity: 0.55; transition: opacity 0.2s ease, border-color 0.2s ease;
  padding: 0;
}
.flipbook .thumb img { width:100%; height:100%; object-fit: cover; display: block; }
.flipbook .thumb:hover { opacity: 1; }
.flipbook .thumb.active { opacity: 1; border-color: var(--brand); }

.nav-strip {
  max-width: 1280px; margin: 0 auto; padding: 32px 48px 100px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  letter-spacing: 0.2em; color: var(--ink-mid); text-transform: uppercase; font-weight: 700;
  padding-top: 32px;
}
.nav-strip a { color: var(--navy); }
.nav-strip a:hover { color: var(--brand); }
.nav-strip .prev::before { content: "← "; color: var(--brand); }
.nav-strip .next::after { content: " →"; color: var(--brand); }

/* ===== Tablet — grid stays 3-col, only non-grid views shrink ===== */
@media (max-width: 1024px) {
  .section-title {
    grid-template-columns: auto 1fr auto;
  }
  .hero-home h1 { font-size: clamp(48px, 8vw, 80px); }
}

/* ===== Mobile ===== */
@media (max-width: 760px) {
  .hero-home {
    padding: 56px 20px 40px;
  }
  .hero-home h1 { font-size: clamp(42px, 11vw, 56px); line-height: 1; }
  .hero-home .lead { font-size: 16px; }
  .hero-home .byline { padding-top: 16px; }

  .section-title {
    padding: 0 20px;
    grid-template-columns: 1fr;
    align-items: start;
    gap: 12px;
    margin: 40px auto 20px;
  }
  .section-title .rule { display: none; }
  .section-title .count { order: -1; }

  .series-grid {
    padding: 0 20px 72px;
    gap: 12px;
  }
  /* Grid 뷰는 모바일에서도 3열 유지 (썸네일만 있는 타일 느낌) */
  .series-grid.view-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .series-grid.view-grid .series-card .body {
    padding: 10px 10px 12px;
  }
  .series-grid.view-grid .series-card h3 { font-size: 13px; line-height: 1.25; }
  .series-grid.view-grid .series-card .tag { font-size: 8.5px; letter-spacing: 0.14em; }
  .series-grid.view-grid .series-card .subt,
  .series-grid.view-grid .series-card .desc,
  .series-grid.view-grid .series-card .cue { display: none; }
  .series-grid.view-grid .series-card .thumb .hanja {
    font-size: clamp(28px, 7vw, 44px); right: 8px; top: 6px;
  }

  /* 1-Col view: 원래대로 단일 열 크게 */
  .series-grid.view-single {
    grid-template-columns: 1fr;
  }

  .series-card h3 { font-size: 22px; }

  .issue-head { grid-template-columns: 1fr; padding: 40px 20px 28px; gap: 20px; }
  .issue-head h1 { font-size: 44px; }

  .flipbook { padding: 12px 12px 80px; min-height: calc(100vh - 60px); }
  .flipbook .viewport {
    width: min(calc(100vw - 24px), calc(100vh - 160px));
    height: min(calc(100vw - 24px), calc(100vh - 160px));
  }
  .flipbook button.turn { width: 42px; height: 42px; font-size: 18px; }
  .flipbook button.turn.prev-btn { left: 6px; }
  .flipbook button.turn.next-btn { right: 6px; }

  .nav-strip { padding: 24px 20px; flex-direction: column; gap: 14px; align-items: flex-start; }
  .site-nav-inner { padding: 14px 20px; }
  .site-foot {
    padding: 32px 20px 56px;
    flex-direction: column; gap: 10px; align-items: flex-start;
  }
}

/* ============================================================
   PORTAL · 서가 한 권
   ============================================================ */
body.portal {
  background:
    radial-gradient(ellipse 1200px 600px at 50% -10%, rgba(227,82,5,0.08), transparent 60%),
    linear-gradient(180deg, #f6f0e3 0%, #ece2cc 60%, #d8c8a6 100%);
  min-height: 100vh;
  display: flex; flex-direction: column;
}

.portal-hero {
  max-width: var(--shell-max); margin: 0 auto;
  padding: clamp(56px, 8vw, 96px) var(--shell-pad) clamp(24px, 3vw, 36px);
  text-align: center;
}
.portal-eyebrow {
  display: inline-flex; align-items: center; gap: 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px; letter-spacing: 0.32em;
  color: var(--brand); font-weight: 700; text-transform: uppercase;
}
.portal-eyebrow::before, .portal-eyebrow::after {
  content: ""; width: 28px; height: 2px; background: var(--brand);
}
.portal-hero h1 {
  margin-top: 22px;
  font-size: clamp(40px, 6.4vw, 76px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.04em;
  color: var(--navy);
  text-wrap: balance;
}
.portal-hero h1 em {
  font-family: 'Playfair Display', serif; font-style: italic; font-weight: 700;
}
.portal-lead {
  margin: clamp(18px, 2vw, 26px) auto 0;
  max-width: 580px;
  font-size: clamp(15px, 1.2vw, 17px);
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ===== 서가 무대 ===== */
.shelf-stage {
  position: relative;
  max-width: 880px;
  margin: clamp(32px, 5vw, 64px) auto 0;
  padding: 0 var(--shell-pad) clamp(80px, 10vw, 140px);
  flex: 1;
  display: flex; flex-direction: column; align-items: center;
  perspective: 1600px;
}

.shelf {
  position: relative;
  display: flex; align-items: flex-end; justify-content: center;
  gap: clamp(28px, 5vw, 72px);
  min-height: 440px;
  padding: 0 40px;
  z-index: 2;
  flex-wrap: wrap;
}

/* 책 (정면 표지) */
.book {
  position: relative;
  display: block;
  width: clamp(240px, 28vw, 320px);
  height: clamp(340px, 40vw, 460px);
  transform-style: preserve-3d;
  transform: rotateY(-14deg) rotateX(2deg);
  transition: transform 700ms var(--ease-out-quart),
              filter 500ms var(--ease-out-quart);
  cursor: pointer;
  filter: drop-shadow(0 30px 40px rgba(15,30,56,0.25));
}
.book:hover, .book:focus-visible {
  transform: rotateY(-6deg) rotateX(0deg) translateY(-12px);
  filter: drop-shadow(0 50px 60px rgba(15,30,56,0.35));
}
.book:focus-visible { outline: 3px solid var(--brand); outline-offset: 12px; border-radius: 4px; }

/* 책 표지 정면 */
.book-cover {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(255,255,255,0.08), transparent 60%),
    linear-gradient(135deg, #16284a 0%, #0f1e38 55%, #0a172c 100%);
  border-radius: 3px 6px 6px 3px;
  box-shadow:
    inset 2px 0 0 rgba(255,255,255,0.06),
    inset -1px 0 0 rgba(0,0,0,0.3),
    inset 0 -2px 0 rgba(0,0,0,0.4);
  overflow: hidden;
}
/* 직물 텍스처 */
.book-cover::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.018) 0 2px, transparent 2px 4px),
    repeating-linear-gradient(-45deg, rgba(0,0,0,0.05) 0 2px, transparent 2px 4px);
  pointer-events: none;
}

.cover-frame {
  position: absolute; inset: 28px 26px 26px 32px;
  border: 1px solid rgba(255,228,208,0.28);
  border-radius: 2px;
  padding: 26px 22px 22px;
  display: flex; flex-direction: column;
  color: #f7eddc;
}
.cover-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px; letter-spacing: 0.28em;
  color: var(--brand);
  font-weight: 700;
}
.cover-title {
  margin-top: 22px;
  display: flex; flex-direction: column; gap: 2px;
  line-height: 0.95;
}
.cover-ai {
  font-family: 'Playfair Display', serif;
  font-weight: 800;
  font-size: clamp(56px, 8vw, 88px);
  letter-spacing: -0.04em;
  color: #fff;
}
.cover-x {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: clamp(28px, 4vw, 40px);
  color: var(--brand);
  margin: 4px 0;
}
.cover-series {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-weight: 700;
  font-size: clamp(40px, 6vw, 64px);
  color: #ffe4d0;
  letter-spacing: -0.02em;
}
.cover-rule {
  margin-top: 18px;
  height: 1px;
  background: linear-gradient(90deg, var(--brand) 0%, var(--brand) 36%, rgba(255,228,208,0.2) 36%);
}
.cover-sub {
  margin-top: 14px;
  font-size: clamp(13px, 1.05vw, 15px);
  line-height: 1.5;
  color: #d9c8a8;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.cover-meta {
  margin-top: auto;
  padding-top: 18px;
  display: flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; letter-spacing: 0.2em;
  color: #ffe4d0;
  text-transform: uppercase;
}
.cover-meta b { color: var(--brand); font-weight: 800; font-size: 13px; }
.cover-meta .dot { color: rgba(255,228,208,0.45); }
.cover-author {
  margin-top: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.18em;
  color: rgba(255,228,208,0.55);
  text-transform: uppercase;
}
.cover-author b { color: #f7eddc; font-weight: 700; }
.cover-cue {
  margin-top: 14px;
  font-family: 'Playfair Display', serif; font-style: italic; font-weight: 700;
  font-size: 14px; color: var(--brand);
  opacity: 0.9;
  transition: transform 400ms var(--ease-out-quart), opacity 400ms;
}
.book:hover .cover-cue { transform: translateX(6px); opacity: 1; }

/* 책 종이단면 (오른쪽) */
.book-pages {
  position: absolute;
  top: 4px; bottom: 4px; right: -10px;
  width: 12px;
  background:
    repeating-linear-gradient(90deg, #f3e9d0 0 1px, #e8dcbe 1px 2px, #faf2dc 2px 3px);
  transform: translateZ(-8px);
  border-radius: 1px 2px 2px 1px;
  box-shadow: inset -1px 0 0 rgba(0,0,0,0.18);
}

/* 책등 (왼쪽 살짝 보이게) */
.book-spine {
  position: absolute;
  top: 0; bottom: 0; left: -1px;
  width: 26px;
  background:
    linear-gradient(90deg, rgba(0,0,0,0.45), rgba(0,0,0,0.0) 60%),
    linear-gradient(180deg, #0c1a32, #0a172c);
  transform-origin: right center;
  transform: rotateY(60deg) translateX(-13px);
  border-radius: 2px 0 0 2px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.spine-text {
  writing-mode: vertical-rl;
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(255,228,208,0.5);
  white-space: nowrap;
}

/* 선반 판 */
.shelf-board {
  position: relative;
  width: min(100%, 760px);
  height: 22px;
  background:
    linear-gradient(180deg, #b8956a 0%, #8a6a45 50%, #5e4527 100%);
  box-shadow:
    0 2px 0 rgba(0,0,0,0.25),
    0 14px 24px -8px rgba(0,0,0,0.35),
    inset 0 1px 0 rgba(255,255,255,0.18);
  border-radius: 2px;
  margin-top: -8px;
  z-index: 1;
}
.shelf-board::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(0,0,0,0.06) 0 2px, transparent 2px 38px),
    repeating-linear-gradient(180deg, rgba(255,255,255,0.04) 0 1px, transparent 1px 4px);
  pointer-events: none;
}
.shelf-shadow {
  width: min(100%, 600px);
  height: 60px;
  margin-top: 6px;
  background: radial-gradient(ellipse at center top, rgba(0,0,0,0.28), transparent 70%);
  filter: blur(2px);
}

@media (max-width: 720px) {
  .book { transform: rotateY(-8deg); }
  .book:hover, .book:focus-visible { transform: rotateY(-2deg) translateY(-8px); }
  .cover-frame { inset: 20px 18px 18px 22px; padding: 20px 16px 16px; }
  .shelf-board { height: 16px; }
  .portal-hero h1 { font-size: clamp(32px, 9vw, 48px); }
}

/* 두 번째 책 — AI × History (가죽/버건디 톤) */
.book-history .book-cover {
  background:
    radial-gradient(ellipse at 30% 20%, rgba(255,255,255,0.06), transparent 60%),
    linear-gradient(135deg, #5a1c1c 0%, #3d1010 55%, #2a0a0a 100%);
}
.book-history .book-cover::before {
  background-image:
    repeating-linear-gradient(45deg, rgba(255,220,180,0.025) 0 2px, transparent 2px 4px),
    repeating-linear-gradient(-45deg, rgba(0,0,0,0.06) 0 2px, transparent 2px 4px);
}
.book-history .cover-frame {
  border-color: rgba(243,210,168,0.32);
  color: #f3d2a8;
}
.book-history .cover-eyebrow { color: #e6a86a; }
.book-history .cover-ai { color: #fff5e1; }
.book-history .cover-x { color: #e6a86a; }
.book-history .cover-series { color: #f3d2a8; }
.book-history .cover-rule {
  background: linear-gradient(90deg, #c8862f 0%, #c8862f 36%, rgba(243,210,168,0.2) 36%);
}
.book-history .cover-sub { color: #d8b888; }
.book-history .cover-meta b { color: #e6a86a; }
.book-history .cover-meta { color: #f3d2a8; }
.book-history .cover-meta .dot { color: rgba(243,210,168,0.45); }
.book-history .cover-author { color: rgba(243,210,168,0.55); }
.book-history .cover-author b { color: #f3d2a8; }
.book-history .cover-cue { color: #e6a86a; }
.book-history .book-spine {
  background:
    linear-gradient(90deg, rgba(0,0,0,0.5), rgba(0,0,0,0.0) 60%),
    linear-gradient(180deg, #4a1414, #2a0a0a);
}
.book-history .spine-text { color: rgba(243,210,168,0.55); }

/* 두 권 나란할 때 살짝 기울기 변화로 입체감 */
.book-series { transform: rotateY(-12deg) rotateX(2deg); }
.book-history { transform: rotateY(12deg) rotateX(2deg); }
.book-series:hover, .book-series:focus-visible { transform: rotateY(-4deg) translateY(-12px); }
.book-history:hover, .book-history:focus-visible { transform: rotateY(4deg) translateY(-12px); }
/* History는 책등이 오른쪽으로 보이게 */
.book-history .book-spine {
  left: auto; right: -1px;
  transform-origin: left center;
  transform: rotateY(-60deg) translateX(13px);
  border-radius: 0 2px 2px 0;
}
.book-history .book-pages {
  right: auto; left: -10px;
  background:
    repeating-linear-gradient(90deg, #faf2dc 0 1px, #e8dcbe 1px 2px, #f3e9d0 2px 3px);
  box-shadow: inset 1px 0 0 rgba(0,0,0,0.18);
}

/* AI Chronicle — 단행본 두 줄 타이틀 */
.cover-title--chronicle {
  margin-top: 24px;
  display: flex; flex-direction: column; align-items: center;
  line-height: 0.95;
  gap: 4px;
}
.cover-title--chronicle .chronicle-ai {
  font-family: 'Playfair Display', serif;
  font-weight: 800;
  font-style: normal;
  font-size: clamp(58px, 8vw, 86px);
  letter-spacing: -0.02em;
  color: #fff5e1;
  text-align: center;
}
.cover-title--chronicle .chronicle-word {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-style: italic;
  font-size: clamp(42px, 5.4vw, 58px);
  letter-spacing: 0.005em;
  color: #f3d2a8;
  text-align: center;
}

/* ============================================================
   PORTAL v2 · 진짜 책장 (책등이 꽂힌 모습)
   ============================================================ */
.bookcase {
  max-width: 1180px;
  margin: clamp(20px, 3vw, 40px) auto 0;
  padding: 0 var(--shell-pad) clamp(60px, 8vw, 100px);
}

/* 책장 외곽 프레임 — 어두운 나무 */
.bookcase-frame {
  position: relative;
  background:
    /* 안쪽 그림자 */
    radial-gradient(ellipse 80% 60% at 50% 50%, transparent 40%, rgba(0,0,0,0.45) 100%),
    /* 어두운 책장 안 색 */
    linear-gradient(180deg, #2a1d12 0%, #1a120a 100%);
  padding: 14px 28px 0;
  border-radius: 4px;
  box-shadow:
    0 30px 60px -10px rgba(0,0,0,0.45),
    inset 0 0 0 1px rgba(255,255,255,0.04);
}

/* 윗판 — 두꺼운 나무 상단 */
.bookcase-top {
  position: absolute;
  top: -14px; left: 0; right: 0;
  height: 22px;
  background:
    linear-gradient(180deg, #6e4a2a 0%, #5a3a20 50%, #3e2814 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,220,180,0.18),
    0 4px 8px rgba(0,0,0,0.3);
  border-radius: 4px 4px 2px 2px;
}
.bookcase-top::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(0,0,0,0.06) 0 2px, transparent 2px 60px);
  pointer-events: none;
}

/* 좌우 측면 나무 기둥 */
.bookcase-side {
  position: absolute;
  top: 14px; bottom: 0;
  width: 14px;
  background: linear-gradient(180deg, #5a3a20 0%, #3e2814 100%);
  box-shadow: inset 1px 0 0 rgba(255,220,180,0.12), inset -1px 0 0 rgba(0,0,0,0.4);
}
.bookcase-side-l { left: 0; border-radius: 2px 0 0 2px; }
.bookcase-side-r { right: 0; border-radius: 0 2px 2px 0; }

/* 한 칸의 선반 */
.bookcase-shelf {
  position: relative;
  padding: 24px 0 0;
}

/* 책들이 꽂히는 영역 — 가로 빽빽이, 좌우 측면 기둥 침범 방지 */
.books {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 1px;
  height: 420px;
  padding: 0 14px;
  perspective: 1200px;
  overflow: hidden;
}

/* 책등 공통 */
.spine {
  position: relative;
  display: flex;
  align-items: stretch;
  justify-content: center;
  width: var(--w, 40px);
  height: var(--h, 90%);
  background:
    linear-gradient(90deg,
      rgba(0,0,0,0.45) 0%,
      rgba(0,0,0,0.0) 8%,
      rgba(255,255,255,0.06) 50%,
      rgba(0,0,0,0.0) 92%,
      rgba(0,0,0,0.45) 100%
    ),
    linear-gradient(180deg, var(--c1) 0%, var(--c2) 100%);
  border-radius: 1px 2px 1px 1px;
  box-shadow:
    inset 1px 0 0 rgba(255,255,255,0.06),
    inset -1px 0 0 rgba(0,0,0,0.3),
    0 4px 8px rgba(0,0,0,0.25);
  cursor: default;
  transition: transform 350ms var(--ease-out-quart);
  flex-shrink: 0;
}

/* 천 표지 텍스처 (격자 결) */
.spine::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(0,0,0,0.06) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 3px);
  pointer-events: none;
  border-radius: inherit;
}

/* 위·아래 골드 띠 (장식) */
.spine::after {
  content: "";
  position: absolute;
  left: 4px; right: 4px;
  top: 12px; height: 1px;
  background: rgba(200,170,120,0.35);
  box-shadow: 0 calc(var(--h-px, 380px) - 30px) 0 rgba(200,170,120,0.35);
  pointer-events: none;
}

/* 일반(장식용) 책등 */
.s-decor {
  filter: brightness(0.85) saturate(0.9);
}
.s-decor .s-title {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: rgba(245,225,195,0.55);
  white-space: nowrap;
  margin: 22px 0;
  align-self: center;
}

/* 더미 책은 어둡게 — 책장 안 그늘진 책들 */
.s-decor { filter: brightness(0.42) saturate(0.4); opacity: 0.78; }

/* 두드러진 책 (실제 클릭 가능) — 책장 안에서 가장 키 큰 책 */
.s-feature {
  cursor: pointer;
  text-decoration: none;
  z-index: 2;
  filter: none;
  flex-direction: column;
  align-items: stretch;
  justify-content: space-between;
  padding: 14px 0;
  width: clamp(72px, 9vw, 96px);
  height: 100%; /* 책장 안 최대 높이 — 더미는 78~96%라 자연스레 가장 큼 */
  transform: none;
  box-shadow:
    inset 1px 0 0 rgba(255,255,255,0.14),
    inset -1px 0 0 rgba(0,0,0,0.35),
    0 6px 12px rgba(0,0,0,0.35);
  transition: transform 280ms var(--ease-out-quart), box-shadow 280ms var(--ease-out-quart);
}
.s-feature:hover, .s-feature:focus-visible {
  transform: translateY(-6px);
  box-shadow:
    inset 1px 0 0 rgba(255,255,255,0.2),
    inset -1px 0 0 rgba(0,0,0,0.35),
    0 14px 22px rgba(0,0,0,0.5);
}
.s-feature:focus-visible { outline: 2px solid #fff; outline-offset: 4px; }

/* AI × Series — 진한 잉크 네이비 + 강한 오렌지 액센트 */
.s-series {
  --c1: #16284a;
  --c2: #07101f;
}
.s-series .s-title-big { color: #fff5e1; }
.s-series .s-cap { background: linear-gradient(180deg, #E35205, #B5400B); }

/* AI Chronicle — 깊은 burgundy + 골드 */
.s-chronicle {
  --c1: #5a1c1c;
  --c2: #2a0808;
}
.s-chronicle .s-title-big { color: #fff5e1; }
.s-chronicle .s-cap { background: linear-gradient(180deg, #e6a86a, #8a5a17); }

.s-frontier {
  --c1: #0e2a4a;
  --c2: #082042;
}
.s-frontier .s-title-big { color: #c8d6c2; }
.s-frontier .s-cap { background: linear-gradient(180deg, #c8a04a, #8a6d2e); }

/* feature 책등 — 위·아래 색띠(엔드밴드) */
.s-feature .s-cap {
  display: block;
  height: 22px;
  margin: 0 5px;
  border-radius: 1px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.2),
    inset 0 -1px 0 rgba(0,0,0,0.3);
  flex-shrink: 0;
}

/* feature 책등 — 세로 큰 제목 한 줄 */
.s-feature .s-title-big {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: 'Playfair Display', serif;
  font-weight: 800;
  font-style: italic;
  font-size: clamp(18px, 2vw, 22px);
  letter-spacing: 0.01em;
  white-space: nowrap;
  flex: 1;
  display: flex; align-items: center; justify-content: center;
  margin: 8px auto;
  text-shadow: 0 1px 0 rgba(0,0,0,0.4);
}

/* 더미 책의 ::after 띠 비활성 (feature와 헷갈림 방지) */
.s-decor::after { display: none; }
.s-feature::after { display: none; }

/* 선반 판 — 책 아래 */
.bookcase-board {
  position: relative;
  height: 18px;
  background:
    linear-gradient(180deg, #8a5a30 0%, #6e4520 50%, #4a2e15 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,220,180,0.18),
    0 4px 8px rgba(0,0,0,0.35);
  border-radius: 0 0 2px 2px;
  margin: 0 -28px;
}
.bookcase-board::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(0,0,0,0.08) 0 2px, transparent 2px 50px);
  pointer-events: none;
}

/* 책장 가로 넘침 방지 */
.bookcase, .bookcase-frame { overflow: hidden; }

@media (max-width: 720px) {
  .books { height: 340px; gap: 0; padding: 0 14px; }
  .s-feature { width: 64px; }
  .s-feature .s-title-big { font-size: 16px; }
  /* 모바일에서 일부 더미 숨김 */
  .s-hide-sm { display: none; }
  .spine.s-decor { width: 28px; }
}
@media (max-width: 480px) {
  /* 더 좁은 화면 — 더미 최소화 */
  .s-hide-xs { display: none; }
  .s-feature { width: 60px; }
  .spine.s-decor { width: 26px; }
  .bookcase-frame { padding: 14px 18px 0; }
  .bookcase-side { width: 10px; }
  .books { padding: 0 10px; }
  .bookcase-board { margin: 0 -18px; }
}

/* ============================================================
   PORTAL · 책 리스트 (책장 아래) — 표지 + 내용 설명
   ============================================================ */
.book-list {
  max-width: 1180px;
  margin: clamp(40px, 6vw, 80px) auto 0;
  padding: 0 var(--shell-pad) clamp(60px, 8vw, 100px);
}
.bl-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: end;
  margin-bottom: 28px;
}
.bl-head h2 {
  font-size: clamp(26px, 2.8vw, 34px);
  font-weight: 900;
  letter-spacing: -0.025em;
  color: var(--navy);
  line-height: 1;
}
.bl-head h2 em {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  color: var(--brand);
}
.bl-rule { height: 1px; background: var(--line); margin-bottom: 8px; }

.bl-items {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.bl-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.bl-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(15, 30, 56, 0.1);
  border-color: var(--line-strong);
}

/* 책 표지 미니어처 */
.bl-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 5 / 7;
  border-radius: 3px 6px 6px 3px;
  padding: 22px 18px 16px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow:
    inset 2px 0 0 rgba(255,255,255,0.08),
    inset -1px 0 0 rgba(0,0,0,0.25),
    0 8px 16px rgba(0,0,0,0.18);
}
.bl-cover::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0 2px, transparent 2px 4px),
    repeating-linear-gradient(-45deg, rgba(0,0,0,0.05) 0 2px, transparent 2px 4px);
  pointer-events: none;
}

/* AI × Series 표지 — 네이비 + 오렌지 */
.bl-cover-series {
  background: linear-gradient(135deg, #16284a 0%, #0a172c 100%);
  color: #f7eddc;
}
.bl-cover-series .bl-cover-eyebrow { color: var(--brand); }
.bl-cover-series .bl-cover-ai { color: #fff; }
.bl-cover-series .bl-cover-x { color: var(--brand); }
.bl-cover-series .bl-cover-name { color: #ffe4d0; }
.bl-cover-series .bl-cover-rule { background: linear-gradient(90deg, var(--brand) 0 40%, rgba(255,228,208,0.2) 40%); }
.bl-cover-series .bl-cover-foot { color: #ffe4d0; }
.bl-cover-series .bl-cover-foot b { color: var(--brand); }

/* AI Chronicle 표지 — burgundy + 골드 */
.bl-cover-chronicle {
  background: linear-gradient(135deg, #5a1c1c 0%, #2a0808 100%);
  color: #f3d2a8;
}
.bl-cover-chronicle .bl-cover-eyebrow { color: #e6a86a; }
.bl-cover-chronicle .bl-cover-ai { color: #fff5e1; }
.bl-cover-chronicle .bl-cover-name-chr { color: #f3d2a8; }
.bl-cover-chronicle .bl-cover-rule { background: linear-gradient(90deg, #c8862f 0 40%, rgba(243,210,168,0.2) 40%); }
.bl-cover-chronicle .bl-cover-foot { color: #f3d2a8; }
.bl-cover-chronicle .bl-cover-foot b { color: #e6a86a; }

/* AI × Frontier 표지 — 미드나잇 + 시안/황동 */
.bl-cover-frontier {
  background: linear-gradient(135deg, #0e2a4a 0%, #082042 100%);
  color: #c8d6c2;
}
.bl-cover-frontier .bl-cover-eyebrow { color: #5a7c5e; }
.bl-cover-frontier .bl-cover-ai { color: #fff; }
.bl-cover-frontier .bl-cover-x { color: #5a7c5e; }
.bl-cover-frontier .bl-cover-name { color: #c8d6c2; }
.bl-cover-frontier .bl-cover-rule { background: linear-gradient(90deg, #c8a04a 0 40%, rgba(200,214,194,0.2) 40%); }
.bl-cover-frontier .bl-cover-foot { color: #c8d6c2; }
.bl-cover-frontier .bl-cover-foot b { color: #5a7c5e; }

.bl-cover-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 8.5px;
  letter-spacing: 0.22em;
  font-weight: 700;
  position: relative;
}
.bl-cover-stack {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  line-height: 0.95;
  position: relative;
}
.bl-cover-ai {
  font-family: 'Playfair Display', serif;
  font-weight: 800;
  font-size: clamp(28px, 4vw, 38px);
  letter-spacing: -0.02em;
}
.bl-cover-x {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 18px;
  margin: 2px 0;
}
.bl-cover-name {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: -0.01em;
}
.bl-cover-name-chr {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 24px);
  letter-spacing: -0.005em;
  margin-top: 4px;
}
.bl-cover-rule {
  margin-top: 12px;
  height: 1px;
  position: relative;
}
.bl-cover-foot {
  margin-top: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px;
  letter-spacing: 0.18em;
  font-weight: 700;
  text-transform: uppercase;
  position: relative;
}

/* 우측 텍스트 */
.bl-info {
  display: flex;
  flex-direction: column;
  padding-top: 4px;
}
.bl-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 0.26em;
  font-weight: 800;
  color: var(--brand);
  text-transform: uppercase;
}
.bl-info h3 {
  font-family: 'Playfair Display', serif;
  font-weight: 800;
  font-size: clamp(28px, 3vw, 36px);
  letter-spacing: -0.02em;
  color: var(--navy);
  margin-top: 6px;
  line-height: 1.05;
}
.bl-info h3 em {
  font-style: italic;
  color: var(--brand);
}
.bl-desc {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.bl-desc em {
  font-family: 'Pretendard Variable', sans-serif;
  font-style: normal;
  background: linear-gradient(transparent 70%, var(--brand-soft) 70%);
  padding: 0 2px;
  font-weight: 700;
  color: var(--navy);
}
.bl-meta {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-mid);
  text-transform: uppercase;
  font-weight: 700;
}
.bl-meta b {
  color: var(--brand);
  font-weight: 800;
}
.bl-cue {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-weight: 700;
  font-size: 13px;
  color: var(--brand);
  text-transform: none;
  letter-spacing: -0.005em;
  transition: transform 0.2s;
}
.bl-item:hover .bl-cue { transform: translateX(4px); }

@media (max-width: 720px) {
  .bl-item {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 18px;
  }
  .bl-cover {
    width: 56%;
    aspect-ratio: 5 / 7;
    margin: 0;
  }
  .bl-info h3 { font-size: 26px; }
  .bl-desc { font-size: 13.5px; }
}

/* nav-right 모바일 안전 처리 — 좁은 화면에서 글자 줄여 nowrap 유지하되 폭 초과 방지 */
@media (max-width: 540px) {
  .site-nav-inner { gap: 8px; }
  .site-nav .nav-right { font-size: 9.5px; letter-spacing: 0.16em; }
  .site-nav .logo { font-size: 18px; }
}

/* nav-right 책 본문 링크 — 우상단 클릭으로 그 책으로 */
.site-nav .nav-right-link {
  text-decoration: none;
  cursor: pointer;
  transition: color 0.15s;
}
.site-nav .nav-right-link:hover {
  color: var(--brand);
}