:root {
    --bg-panel: #E4DCC6;
    --bg-panel-2: #DBD0B4;
    --bg-inset: #D2C6A6;
    --ink: #17231D;
    --ink-soft: #4B5A50;
    --ink-faint: #6E7A70;
    --line: rgba(23,35,29,0.15);
    --line-strong: rgba(23,35,29,0.28);
    --brass: #8C6328;
    --brass-bright: #B98A3E;
    --brass-ink: #FFFFFF;
    --spine-red: #7B3730;
    --spine-teal: #2B4F49;
    --shadow: rgba(23,35,29,0.18);
    --scan-glow: rgba(185,138,62,0.55);
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --bg-panel: #16211B;
      --bg-panel-2: #1C2A22;
      --bg-inset: #12211A;
      --ink: #ECE5D1;
      --ink-soft: #AAB5A5;
      --ink-faint: #7E8B80;
      --line: rgba(236,229,209,0.14);
      --line-strong: rgba(236,229,209,0.26);
      --brass: #D6A550;
      --brass-bright: #E8BE72;
      --brass-ink: #17231D;
      --spine-red: #B4665B;
      --spine-teal: #5B9089;
      --shadow: rgba(0,0,0,0.5);
      --scan-glow: rgba(214,165,80,0.45);
    }
  }
  :root[data-theme="dark"] {
    --bg-panel: #16211B;
    --bg-panel-2: #1C2A22;
    --bg-inset: #12211A;
    --ink: #ECE5D1;
    --ink-soft: #AAB5A5;
    --ink-faint: #7E8B80;
    --line: rgba(236,229,209,0.14);
    --line-strong: rgba(236,229,209,0.26);
    --brass: #D6A550;
    --brass-bright: #E8BE72;
    --brass-ink: #17231D;
    --spine-red: #B4665B;
    --spine-teal: #5B9089;
    --shadow: rgba(0,0,0,0.5);
    --scan-glow: rgba(214,165,80,0.45);
  }
  :root[data-theme="light"] {
    --bg-panel: #E4DCC6;
    --bg-panel-2: #DBD0B4;
    --bg-inset: #D2C6A6;
    --ink: #17231D;
    --ink-soft: #4B5A50;
    --ink-faint: #6E7A70;
    --line: rgba(23,35,29,0.15);
    --line-strong: rgba(23,35,29,0.28);
    --brass: #8C6328;
    --brass-bright: #B98A3E;
    --brass-ink: #FFFFFF;
    --spine-red: #7B3730;
    --spine-teal: #2B4F49;
    --shadow: rgba(23,35,29,0.18);
    --scan-glow: rgba(185,138,62,0.55);
  }

  ul { margin: 0; padding: 0; list-style: none; }
  a { color: inherit; text-decoration: none; }
  img { max-width: 100%; display: block; }

  .wrap {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 28px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 3px;
    font-size: 0.92rem;
    font-weight: 600;
    white-space: nowrap;
    transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  }
  .btn-primary {
    background: var(--brass);
    color: var(--brass-ink);
  }
  .btn-primary:hover { background: var(--brass-bright); transform: translateY(-1px); }
  .btn-ghost {
    border: 1px solid var(--line-strong);
    color: var(--ink);
  }
  .btn-ghost:hover { border-color: var(--brass); color: var(--brass); }

  @media (max-width: 720px) {
    .navlinks { display: none; }
  }

  /* ---------- eyebrow / labels ---------- */
  .eyebrow {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--brass);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .eyebrow .num { color: var(--ink-faint); }

  /* ---------- hero ---------- */
  .hero {
    padding: 50px 0 40px;
    position: relative;
  }
  .hero-inner {
    max-width: 1100px;
  }
  .hero h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.16;
    letter-spacing: -0.015em;
    margin: 18px 0 22px;
    color: var(--ink);
  }
  .hero .lede {
    font-size: 1.08rem;
    color: var(--ink-soft);
    max-width: 52ch;
    line-height: 1.75;
  }
  .pipeline-chips {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 6px;
    margin-top: 30px;
  }
  .pipeline-chips span {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    padding: 7px 12px;
    border: 1px solid var(--line-strong);
    border-radius: 3px;
    color: var(--ink-soft);
    background: var(--bg-panel);
  }
  .pipeline-chips .arrow {
    border: none;
    background: none;
    color: var(--brass);
    padding: 0 2px;
  }
  .pipeline-chips .hi {
    color: var(--brass);
    border-color: var(--brass);
  }
  .hero-cta {
    display: flex;
    gap: 14px;
    margin-top: 34px;
    flex-wrap: wrap;
  }
  .hero-cta .btn { padding: 13px 24px; font-size: 0.96rem; }

  /* ---------- bookshelf visual ---------- */
  .shelf {
    margin-top: 56px;
    position: relative;
    border-radius: 6px;
    background: linear-gradient(180deg, var(--bg-panel), var(--bg-panel-2));
    border: 1px solid var(--line);
    padding: 0 24px;
    overflow: hidden;
    box-shadow: 0 30px 60px -30px var(--shadow);
  }
  .shelf-row {
    display: flex;
    align-items: flex-end;
    gap: 5px;
    height: 190px;
    padding-top: 26px;
    position: relative;
    z-index: 1;
  }
  .spine {
    width: 34px;
    height: var(--h);
    background: var(--c);
    border-radius: 3px 3px 0 0;
    position: relative;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.08), 2px 0 6px rgba(0,0,0,0.12);
    flex-shrink: 0;
  }
  .spine span {
    position: absolute;
    left: 50%;
    bottom: 14px;
    transform: translateX(-50%) rotate(-90deg);
    transform-origin: bottom left;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.03em;
    color: rgba(255,255,255,0.86);
    white-space: nowrap;
  }
  .shelf-board {
    height: 10px;
    background: var(--line-strong);
    border-radius: 2px;
    margin-bottom: 18px;
  }
  .scanline {
    position: absolute;
    left: 0; right: 0;
    height: 64px;
    top: 0;
    background: linear-gradient(180deg, transparent, var(--scan-glow) 45%, transparent);
    animation: sweep 5s ease-in-out infinite;
    z-index: 2;
    pointer-events: none;
  }
  .scanline::after {
    content: "";
    position: absolute;
    left: 0; right: 0; top: 50%;
    height: 2px;
    background: var(--brass-bright);
    box-shadow: 0 0 14px 2px var(--scan-glow);
  }
  @keyframes sweep {
    0%   { transform: translateY(0); }
    50%  { transform: translateY(150px); }
    100% { transform: translateY(0); }
  }
  .shelf-caption {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0 18px;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--ink-faint);
    border-top: 1px solid var(--line);
    position: relative;
    z-index: 1;
  }
  .shelf-caption .ok { color: var(--brass); }

  @media (prefers-reduced-motion: reduce) {
    .scanline { animation: none; top: 60px; }
  }

  /* ---------- contrast intro ---------- */
  .intro {
    padding: 64px 0;
    border-top: 1px solid var(--line);
  }
  .intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    border-radius: 6px;
    overflow: hidden;
  }
  .intro-card {
    background: var(--bg);
    padding: 32px;
  }
  .intro-card.is-after { background: var(--bg-panel); }
  .intro-card .tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-faint);
  }
  .intro-card.is-after .tag { color: var(--brass); }
  .intro-card h3 {
    font-size: 1.3rem;
    font-weight: 800;
    margin: 10px 0 12px;
  }
  .intro-card p { color: var(--ink-soft); font-size: 0.98rem; line-height: 1.7; }
  @media (max-width: 720px) {
    .intro-grid { grid-template-columns: 1fr; }
  }

  /* ---------- feature sections ---------- */
  .feature {
    padding: 76px 0;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
  }
  .feature.reverse .feature-text { order: 2; }
  .feature.reverse .feature-mockup { order: 1; }
  .feature-text h2 {
    font-size: clamp(1.5rem, 2.6vw, 2.15rem);
    font-weight: 800;
    margin: 14px 0 16px;
    letter-spacing: -0.01em;
  }
  .feature-text > p.body {
    color: var(--ink-soft);
    font-size: 1rem;
    line-height: 1.75;
    max-width: 46ch;
  }
  .feature-list {
    margin-top: 22px;
    display: flex;
    flex-direction: column;
    gap: 11px;
  }
  .feature-list li {
    display: flex;
    gap: 10px;
    font-size: 0.94rem;
    color: var(--ink);
  }
  .feature-list li::before {
    content: "";
    width: 6px; height: 6px;
    border-radius: 1px;
    background: var(--spine-c, var(--brass));
    margin-top: 8px;
    flex-shrink: 0;
    transform: rotate(45deg);
  }

  @media (max-width: 860px) {
    .feature, .feature.reverse {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .feature.reverse .feature-text,
    .feature.reverse .feature-mockup { order: initial; }
  }

  /* ---------- mockup panel ---------- */
  .panel {
    background: var(--bg-panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 24px 48px -28px var(--shadow);
    overflow: hidden;
  }
  .panel-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--line);
    background: var(--bg-panel-2);
  }
  .panel-bar .dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--line-strong);
  }
  .panel-bar .fname {
    margin-left: 8px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
  }
  .panel-body { padding: 22px; }

  .progress {
    height: 6px;
    background: var(--bg-inset);
    border-radius: 3px;
    overflow: hidden;
    margin: 10px 0 6px;
  }
  .progress > i {
    display: block;
    height: 100%;
    background: var(--brass);
    border-radius: 3px;
  }
  .stat-row {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--ink-faint);
  }
  .stat-row b { color: var(--brass); font-weight: 700; }

  .ocr-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 18px;
  }
  .ocr-block {
    background: var(--bg-inset);
    border-radius: 5px;
    padding: 12px;
    font-size: 0.78rem;
    color: var(--ink-faint);
  }
  .ocr-block .lbl {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--ink-faint);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
    display: block;
  }
  .ocr-line { height: 8px; background: var(--line-strong); border-radius: 2px; margin-bottom: 6px; }
  .ocr-line.w1 { width: 92%; } .ocr-line.w2 { width: 78%; } .ocr-line.w3 { width: 85%; } .ocr-line.w4 { width: 60%; }
  .ocr-block.text {
    font-family: var(--font-kr);
    font-size: 0.82rem;
    color: var(--ink);
    line-height: 1.6;
  }
  .ocr-block.text.hi { border: 1px solid var(--brass); background: color-mix(in srgb, var(--brass) 10%, var(--bg-inset)); }

  .tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 14px;
  }
  .tabs span {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 6px 10px;
    border-radius: 3px;
    color: var(--ink-faint);
    border: 1px solid var(--line);
  }
  .tabs span.active {
    background: var(--brass);
    color: var(--brass-ink);
    border-color: var(--brass);
    font-weight: 700;
  }

  .publish-list { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
  .publish-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    background: var(--bg-inset);
    border-radius: 5px;
    font-size: 0.86rem;
  }
  .pill {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    padding: 4px 9px;
    border-radius: 20px;
    letter-spacing: 0.02em;
  }
  .pill.done { background: color-mix(in srgb, var(--brass) 22%, transparent); color: var(--brass); }
  .pill.wait { background: var(--line); color: var(--ink-faint); }

  .ebook-mock { display: flex; gap: 14px; }
  .ebook-page {
    flex: 1;
    background: var(--bg-inset);
    border-radius: 5px;
    padding: 16px;
    min-height: 150px;
  }
  .ebook-page .ptitle { font-family: var(--font-display); font-size: 1rem; margin-bottom: 10px; color: var(--ink); }
  .share-row {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    flex-wrap: wrap;
  }
  .share-row span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 6px 10px;
    border: 1px solid var(--line-strong);
    border-radius: 4px;
    color: var(--ink-soft);
  }
  .viewer-note {
    margin-top: 14px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--brass);
  }

  /* ---------- stats ---------- */
  .stats {
    padding: 70px 0;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    border-radius: 6px;
    overflow: hidden;
  }
  .stat {
    background: var(--bg);
    padding: 30px 22px;
    text-align: center;
  }
  .stat .num {
    font-family: var(--font-mono);
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 700;
    color: var(--brass);
    font-variant-numeric: tabular-nums;
  }
  .stat .label {
    margin-top: 8px;
    font-size: 0.84rem;
    color: var(--ink-soft);
  }
  @media (max-width: 720px) {
    .stats { grid-template-columns: 1fr 1fr; }
  }

  /* ---------- closing ---------- */
  .closing {
    padding: 60px 0 100px;
    text-align: center;
    border-top: 1px solid var(--line);
  }
  .closing h2 {
    font-size: clamp(1.5rem, 4vw, 2.8rem);
    font-weight: 800;
    max-width: 1000px;
    margin: 0 auto 18px;
  }
  .closing p {
    color: var(--ink-soft);
    font-size: 1rem;
    max-width: 46ch;
    margin: 0 auto;
  }
  .closing .btn { margin-top: 32px; padding: 15px 30px; font-size: 1rem; }

  footer {
    border-top: 1px solid var(--line);
    padding: 32px 0 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
  }
  footer .foot-logo { font-family: var(--font-display); font-size: 1.05rem; color: var(--ink-soft); }
  footer .foot-note { font-family: var(--font-mono); font-size: 0.74rem; color: var(--ink-faint); }

  .spine-tab {
    width: 22px; height: 6px;
    background: var(--spine-c, var(--brass));
    border-radius: 1px;
    margin-bottom: 14px;
  }

  :focus-visible { outline: 2px solid var(--brass); outline-offset: 3px; }