:root {
      color-scheme: light dark;
      --sky: #def3f3;
      --paper: #fffaf0;
      --paper-strong: #fffdf8;
      --ink: #182e2e;
      --muted: #4c6261;
      --ocean: #087b82;
      --ocean-deep: #075861;
      --gold: #f2ae2e;
      --gold-soft: #ffd978;
      --coral: #d45536;
      --leaf: #2c7652;
      --wood: #7a4628;
      --line: rgba(24, 46, 46, .16);
      --shadow: 0 18px 50px rgba(10, 62, 66, .16);
      --shadow-soft: 0 10px 30px rgba(10, 62, 66, .11);
    }
    @media (prefers-color-scheme: dark) {
      :root {
        --sky: #0b262b;
        --paper: #112f31;
        --paper-strong: #15383a;
        --ink: #f8f3e7;
        --muted: #c7d8d4;
        --ocean: #51c3c1;
        --ocean-deep: #8edbd6;
        --gold: #f5b83e;
        --gold-soft: #6b4b19;
        --coral: #ef7b5d;
        --leaf: #7cc598;
        --wood: #d29a6b;
        --line: rgba(238, 247, 241, .17);
        --shadow: 0 20px 55px rgba(0, 0, 0, .34);
        --shadow-soft: 0 10px 30px rgba(0, 0, 0, .24);
      }
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 78px; }
    body {
      margin: 0;
      font-family: "Nunito Sans", sans-serif;
      background: var(--sky);
      color: var(--ink);
      line-height: 1.6;
      overflow-x: hidden;
    }
    img { display: block; max-width: 100%; }
    a { color: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    .skip-link {
      position: fixed; top: 8px; left: 8px; z-index: 100;
      transform: translateY(-150%); padding: 10px 14px;
      background: var(--paper-strong); color: var(--ink); border-radius: 8px;
    }
    .skip-link:focus { transform: translateY(0); }
    .topbar {
      position: sticky; top: 0; z-index: 50;
      display: flex; align-items: center; justify-content: center;
      min-height: 66px; padding: 9px 20px;
      background: color-mix(in srgb, var(--paper-strong) 92%, transparent);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .nav { display: flex; align-items: center; justify-content: center; gap: 5px; flex-wrap: wrap; }
    .nav a {
      position: relative; text-decoration: none; font-weight: 800;
      padding: 8px 12px; border-radius: 9px; color: var(--muted);
    }
    .nav a:hover, .nav a:focus-visible, .nav a.active { color: var(--ocean-deep); background: color-mix(in srgb, var(--ocean) 10%, transparent); }
    .hero {
      position: relative; isolation: isolate;
      min-height: min(720px, calc(100svh - 66px));
      display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 470px);
      align-items: center; gap: clamp(36px, 7vw, 100px);
      padding: clamp(52px, 8vw, 96px) max(24px, calc((100vw - 1180px) / 2));
      overflow: hidden;
      background:
        linear-gradient(125deg, color-mix(in srgb, var(--sky) 74%, transparent), color-mix(in srgb, var(--paper) 86%, transparent));
    }
    .hero::before {
      content: ""; position: absolute; z-index: -2; width: 460px; height: 460px;
      border-radius: 50%; right: -150px; top: -160px;
      background: var(--gold-soft); opacity: .42;
    }
    .hero::after {
      content: ""; position: absolute; z-index: -1; left: -4vw; right: -4vw; bottom: -72px; height: 145px;
      background: var(--paper); border-radius: 50% 50% 0 0 / 45% 45% 0 0;
    }
    .hero-copy { max-width: 655px; padding-bottom: 28px; }
    .series-line {
      display: flex; align-items: center; gap: 11px; margin: 0 0 18px;
      color: var(--wood); font-weight: 800; letter-spacing: .03em;
    }
    .series-line::before { content: ""; width: 42px; height: 3px; background: var(--gold); border-radius: 3px; }
    h1, h2, h3 { font-family: "Bree Serif", serif; font-weight: 400; line-height: 1.08; margin: 0; }
    h1 { font-size: clamp(3rem, 7.6vw, 6.7rem); max-width: 820px; letter-spacing: -.035em; }
    .hero h1 span { color: var(--ocean-deep); }
    .hero-copy > p:not(.series-line) { max-width: 610px; margin: 24px 0 29px; font-size: clamp(1.08rem, 2vw, 1.3rem); color: var(--muted); }
    .actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .button {
      display: inline-flex; align-items: center; gap: 9px; min-height: 48px;
      padding: 12px 19px; border-radius: 12px; text-decoration: none; font-weight: 800;
      border: 2px solid transparent; transition: transform .18s ease, background .18s ease;
    }
    .button:hover { transform: translateY(-2px); }
    .button.primary { color: #fffaf1; background: var(--coral); box-shadow: 0 8px 0 color-mix(in srgb, var(--coral) 60%, #4d1d13); }
    .button.primary:active { transform: translateY(4px); box-shadow: 0 4px 0 color-mix(in srgb, var(--coral) 60%, #4d1d13); }
    .button.secondary { color: var(--ocean-deep); border-color: var(--ocean); background: var(--paper-strong); }
    .cover-stage { position: relative; width: min(100%, 425px); justify-self: center; padding-bottom: 24px; }
    .cover-stage img {
      width: 82%; margin-inline: auto; border-radius: 4px 11px 11px 4px;
      box-shadow: 14px 18px 0 color-mix(in srgb, var(--wood) 66%, #3a2217), var(--shadow);
      transform: rotate(2deg);
    }
    .cover-stage::after {
      content: ""; position: absolute; left: 10%; right: 3%; bottom: 2px; height: 24px;
      background: rgba(23, 53, 50, .22); filter: blur(12px); border-radius: 50%; z-index: -1;
    }
    .section { padding: clamp(72px, 9vw, 112px) max(24px, calc((100vw - 1180px) / 2)); }
    .paper { background: var(--paper); }
    .section-heading { max-width: 680px; margin-bottom: 42px; }
    .section-heading .kicker { margin: 0 0 8px; color: var(--coral); font-weight: 800; }
    .section-heading h2 { font-size: clamp(2.25rem, 5vw, 4.25rem); }
    .section-heading p { margin: 15px 0 0; color: var(--muted); font-size: 1.08rem; }
    .book-feature {
      display: grid; grid-template-columns: minmax(220px, 370px) 1fr; gap: clamp(38px, 7vw, 90px); align-items: center;
    }
    .book-cover img { border-radius: 4px 10px 10px 4px; box-shadow: 12px 14px 0 var(--wood), var(--shadow); }
    .book-copy .book-no { color: var(--coral); font-weight: 800; }
    .book-copy h3 { font-size: clamp(2.1rem, 4vw, 3.7rem); margin: 7px 0 18px; }
    .book-copy p { max-width: 650px; font-size: 1.1rem; color: var(--muted); }
    .series-shelf {
      display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: clamp(22px, 4vw, 42px); margin-top: 84px;
    }
    .series-card {
      display: grid; grid-template-columns: minmax(125px, 190px) 1fr;
      align-items: center; gap: clamp(22px, 3vw, 34px); padding: clamp(22px, 3vw, 32px);
      background: var(--paper-strong); border: 1px solid var(--line);
      border-radius: 6px 18px 6px 18px; box-shadow: var(--shadow-soft);
    }
    .series-card img,
    .series-card .cover-placeholder {
      width: 100%; border-radius: 3px 8px 8px 3px;
      box-shadow: 7px 9px 0 color-mix(in srgb, var(--wood) 72%, #3a2217), 0 12px 28px rgba(10, 45, 47, .15);
    }
    .cover-placeholder {
      aspect-ratio: 2 / 3; display: grid; place-items: center; align-content: center;
      padding: 22px 16px; text-align: center; overflow: hidden;
      color: var(--ocean-deep); border: 2px solid var(--gold);
      background: color-mix(in srgb, var(--sky) 58%, var(--paper-strong));
    }
    .cover-placeholder::before {
      content: ""; width: 44px; height: 44px; margin-bottom: 13px;
      border: 3px solid var(--gold); border-radius: 50%;
      background: linear-gradient(45deg, transparent 46%, var(--coral) 47% 53%, transparent 54%);
    }
    .cover-placeholder strong { font-family: "Bree Serif", serif; font-size: 1.15rem; font-weight: 400; line-height: 1.15; }
    .cover-placeholder span { margin-top: 7px; color: var(--muted); font-size: .78rem; font-weight: 800; }
    .series-card .book-no { margin: 0 0 6px; color: var(--coral); font-weight: 800; }
    .series-card h3 { font-size: clamp(1.65rem, 3vw, 2.45rem); margin-bottom: 12px; }
    .series-card p:last-child { margin: 0; color: var(--muted); }
    .book-description p { margin: 0 0 14px; color: var(--muted); }
    .book-description .encourages { margin-bottom: 7px; color: var(--ink); font-weight: 800; }
    .encouragement-list { margin: 0 0 14px; padding-left: 1.2rem; color: var(--muted); }
    .encouragement-list li + li { margin-top: 4px; }
    .next-book-copy .book-description p,
    .next-book-copy .encouragement-list { color: #e4f2ef; }
    .next-book-copy .book-description .encourages { color: #fffaf1; }
    .theme-list { display: flex; flex-wrap: wrap; gap: 9px; padding: 0; margin: 23px 0 30px; list-style: none; }
    .theme-list li { padding: 7px 12px; border: 1px solid var(--line); background: var(--paper-strong); border-radius: 8px; font-weight: 800; }
    .status { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; color: var(--leaf); }
    .status::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--leaf); }
    .buy-options { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 22px; }
    .buy-options .button { min-width: 178px; justify-content: center; }
    .series-card .buy-options { margin-top: 20px; }
    .series-card .buy-options .button { flex: 1 1 165px; min-width: 0; padding-inline: 14px; }
    .next-book {
      margin-top: 80px; display: grid; grid-template-columns: 1.15fr .85fr; align-items: stretch;
      background: var(--ocean-deep); color: #fffaf1; border-radius: 18px 6px 18px 6px; overflow: hidden; box-shadow: var(--shadow);
    }
    .next-book-copy { padding: clamp(34px, 5vw, 62px); align-self: center; }
    .next-book-copy .book-no { color: #ffd978; font-weight: 800; }
    .next-book-copy h3 { font-size: clamp(2rem, 4vw, 3.4rem); margin: 9px 0 16px; }
    .next-book-copy p { color: #e4f2ef; margin: 0 0 20px; }
    .next-book-art { position: relative; min-height: 360px; overflow: hidden; background: color-mix(in srgb, var(--ocean-deep) 86%, #102929); }
    .next-book-art img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
    .crew-section { background: var(--sky); }
    .crew-portrait {
      position: relative; margin: 0; overflow: hidden;
      border-radius: 8px 28px 8px 28px; box-shadow: var(--shadow);
      background: var(--paper-strong);
    }
    .crew-portrait img { width: 100%; aspect-ratio: 1402 / 1122; object-fit: cover; }
    .crew-portrait figcaption {
      display: flex; align-items: baseline; justify-content: space-between; gap: 24px;
      padding: 22px clamp(22px, 4vw, 42px); background: var(--paper-strong);
    }
    .crew-portrait strong { font-family: "Bree Serif", serif; font-size: clamp(1.35rem, 3vw, 2rem); font-weight: 400; }
    .crew-portrait span { color: var(--muted); text-align: right; }
    .for-grownups { display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(42px, 8vw, 100px); align-items: start; }
    .grownup-intro { position: sticky; top: 100px; }
    .grownup-intro h2 { font-size: clamp(2.3rem, 5vw, 4.25rem); margin-bottom: 18px; }
    .grownup-intro p { font-size: 1.1rem; color: var(--muted); }
    .notes { display: grid; gap: 18px; }
    .note { padding: 26px 28px; background: var(--paper-strong); border-radius: 6px 17px 6px 17px; box-shadow: var(--shadow-soft); }
    .note h3 { font-size: 1.5rem; margin-bottom: 8px; color: var(--ocean-deep); }
    .note p { margin: 0; color: var(--muted); }
    .about {
      display: grid; grid-template-columns: 1fr .95fr; gap: clamp(42px, 8vw, 100px); align-items: center;
    }
    .about-copy h2 { font-size: clamp(2.4rem, 5vw, 4.3rem); }
    .about-copy p { color: var(--muted); font-size: 1.1rem; }
    .about-art {
      display: grid; place-items: center; min-height: 390px; padding: clamp(24px, 4vw, 44px);
      border-radius: 22px 7px 22px 7px; overflow: hidden;
      border: 8px solid var(--gold); box-shadow: var(--shadow); background: #fff;
    }
    .about-art img { width: 100%; height: auto; object-fit: contain; }
    .closing { text-align: center; background: var(--ocean-deep); color: #fffaf1; padding: clamp(65px, 9vw, 105px) 24px; }
    .closing h2 { max-width: 780px; margin: 0 auto; font-size: clamp(2.4rem, 5vw, 4.8rem); }
    .closing > p { max-width: 650px; margin: 18px auto 30px; color: #e4f2ef; font-size: 1.12rem; }
    .closing > .newsletter-gift { margin-top: -12px; color: #ffd978; font-weight: 800; }
    .newsletter-form { width: min(100%, 620px); margin-inline: auto; text-align: left; }
    footer { background: #102929; color: #cfe1dc; text-align: center; padding: 24px; font-size: .94rem; }
    .reveal { opacity: 1; transform: none; }
    @media (max-width: 760px) {
      html { scroll-padding-top: 104px; }
      .topbar { padding-inline: 10px; }
      .nav { gap: 2px; }
      .nav a { padding: 7px 9px; font-size: .91rem; }
      .hero { grid-template-columns: 1fr; text-align: center; min-height: auto; padding-top: 55px; padding-bottom: 105px; }
      .hero-copy { padding-bottom: 0; }
      .series-line, .actions { justify-content: center; }
      .series-line::before { display: none; }
      .hero-copy > p:not(.series-line) { margin-inline: auto; }
      .cover-stage { max-width: 350px; }
      .book-feature, .for-grownups, .about { grid-template-columns: 1fr; }
      .series-shelf { grid-template-columns: 1fr; }
      .book-cover { width: min(74vw, 350px); margin-inline: auto; }
      .book-copy { text-align: center; }
      .book-copy p { margin-inline: auto; }
      .theme-list { justify-content: center; }
      .next-book { grid-template-columns: 1fr; }
      .next-book-art { min-height: 0; aspect-ratio: 1; order: -1; }
      .crew-portrait figcaption { display: block; }
      .crew-portrait span { display: block; margin-top: 6px; text-align: left; }
      .grownup-intro { position: static; }
      .about { text-align: center; }
      .about-art { min-height: 340px; max-width: 500px; width: 100%; margin-inline: auto; }
    }
    @media (max-width: 520px) {
      .series-card { grid-template-columns: 1fr; text-align: center; }
      .series-card img, .series-card .cover-placeholder { width: min(68vw, 245px); margin-inline: auto; }
    }
    @media (max-width: 410px) {
      .nav a { font-size: .82rem; padding: 6px 7px; }
      h1 { font-size: 2.75rem; }
      .button { width: 100%; justify-content: center; }
      .section { padding-inline: 19px; }
      .note { padding: 22px; }
    }