:root {
        color-scheme: light;
        --ink: #101936;
        --ink-soft: #4b5877;
        --night: #080d22;
        --paper: #f4f5ff;
        --white: #ffffff;
        --blue: #5c4df2;
        --mint: #40e0bd;
        --coral: #ff557a;
        --yellow: #ffd34f;
        --line: #cfd5e9;
      }
      * { box-sizing: border-box; }
      html { scroll-behavior: smooth; }
      body { margin: 0; color: var(--ink); background: var(--paper); font-family: Arial, "Segoe UI", sans-serif; line-height: 1.5; }
      a { color: inherit; }
      .site-header { border-bottom: 1px solid var(--line); background: rgba(255,255,255,.92); }
      .site-header-inner, .page, .site-footer-inner { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
      .site-header-inner { display: flex; min-height: 78px; align-items: center; justify-content: space-between; gap: 24px; }
      .brand { text-decoration: none; font-size: 24px; font-weight: 900; }
      .brand span { display: block; color: var(--coral); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; }
      .back-link { color: var(--ink-soft); font-size: 15px; font-weight: 800; text-decoration: none; }
      .page { padding: 72px 0 88px; }
      .hero { padding: 64px; border-radius: 36px; color: var(--white); background: var(--night); box-shadow: 14px 14px 0 var(--blue); }
      .eyebrow { margin: 0 0 18px; color: var(--mint); font-size: 14px; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
      h1, h2, h3 { margin: 0; line-height: 1.02; letter-spacing: -.035em; }
      h1 { max-width: 920px; font-size: clamp(48px, 7vw, 86px); }
      .intro { max-width: 760px; margin: 28px 0 0; color: rgba(255,255,255,.78); font-size: 21px; }
      .actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
      .button { display: inline-flex; min-height: 52px; padding: 14px 22px; align-items: center; justify-content: center; border: 2px solid var(--yellow); border-radius: 999px; color: var(--ink); background: var(--yellow); font-weight: 900; text-decoration: none; }
      .button.secondary { color: var(--white); background: transparent; }
      .use-card, .experiment-card, .final-card { margin-top: 54px; padding: 46px; border: 2px solid var(--line); border-radius: 30px; background: var(--white); }
      .use-card h2, .experiment-card h2, .final-card h2 { font-size: clamp(34px, 5vw, 56px); }
      .steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 30px; }
      .step { min-height: 150px; padding: 24px; border-radius: 22px; color: var(--ink); font-size: 18px; font-weight: 800; }
      .step strong { display: block; margin-bottom: 22px; font-size: 28px; }
      .step:nth-child(1) { background: var(--mint); }
      .step:nth-child(2) { background: var(--yellow); }
      .step:nth-child(3) { background: #ff8ca5; }
      .experiment-head { display: grid; grid-template-columns: 120px 1fr; gap: 28px; align-items: start; }
      .experiment-number { display: grid; width: 108px; height: 108px; place-items: center; border-radius: 28px; color: var(--white); background: var(--blue); font-size: 42px; font-weight: 900; }
      .experiment-card:nth-of-type(4) .experiment-number { color: var(--ink); background: var(--mint); }
      .experiment-card:nth-of-type(5) .experiment-number { color: var(--ink); background: var(--yellow); }
      .experiment-summary { margin: 16px 0 0; color: var(--ink-soft); font-size: 19px; }
      .fill-in { margin: 30px 0 0; padding: 18px 22px; border-left: 8px solid var(--coral); background: var(--paper); font-size: 16px; font-weight: 800; }
      .prompt-label { margin: 32px 0 12px; color: var(--blue); font-size: 13px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
      .prompt-box { padding: 30px; border: 3px solid var(--ink); border-radius: 24px; background: #fffdf4; box-shadow: 9px 9px 0 var(--yellow); font-size: 18px; line-height: 1.55; }
      .prompt-box p { margin: 0; }
      .prompt-box p + p { margin-top: 16px; }
      .prompt-box strong { font-weight: 900; }
      .try-it { margin: 30px 0 0; font-size: 17px; }
      .check-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 30px; }
      .check { padding: 24px; border-radius: 20px; background: var(--paper); font-weight: 800; }
      .privacy { margin: 28px 0 0; padding: 22px 24px; border-radius: 20px; color: var(--white); background: var(--night); font-weight: 800; }
      .closing { margin-top: 42px; padding: 34px; border-radius: 24px; color: var(--ink); background: var(--yellow); }
      .closing strong { display: block; font-size: clamp(30px, 5vw, 48px); line-height: 1.05; }
      .closing span { display: block; margin-top: 18px; font-size: 18px; font-weight: 800; }
      .soft-sales { margin-top: 32px; padding-top: 30px; border-top: 1px solid var(--line); color: var(--ink-soft); }
      .soft-sales a { color: var(--blue); font-weight: 900; }
      .site-footer { padding: 32px 0; color: rgba(255,255,255,.72); background: var(--night); }
      .site-footer-inner { display: flex; justify-content: space-between; gap: 24px; font-size: 14px; }
      .site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
      .site-footer a { text-decoration: none; }
      @media (max-width: 760px) {
        .page { padding-top: 30px; }
        .hero, .use-card, .experiment-card, .final-card { padding: 28px; border-radius: 24px; }
        .steps, .check-grid { grid-template-columns: 1fr; }
        .experiment-head { grid-template-columns: 1fr; }
        .experiment-number { width: 82px; height: 82px; border-radius: 22px; font-size: 34px; }
        .prompt-box { padding: 22px; font-size: 16px; }
        .site-footer-inner { flex-direction: column; }
      }
      @media print {
        @page { size: A4; margin: 13mm; }
        body { background: var(--white); print-color-adjust: exact; -webkit-print-color-adjust: exact; }
        .site-header, .site-footer, .actions { display: none; }
        .page { width: auto; padding: 0; }
        .hero { min-height: 245mm; padding: 22mm 17mm; border-radius: 0; box-shadow: none; }
        .hero h1 { font-size: 58px; }
        .intro { font-size: 20px; }
        .use-card { position: absolute; right: 17mm; bottom: 18mm; left: 17mm; margin: 0; padding: 10mm; border: 0; }
        .use-card h2 { font-size: 34px; }
        .step { min-height: 110px; padding: 18px; font-size: 15px; }
        .experiment-card, .final-card { min-height: 270mm; margin: 0; padding: 14mm; break-before: page; border: 0; border-radius: 0; }
        .experiment-card h2, .final-card h2 { font-size: 42px; }
        .prompt-box { font-size: 16px; box-shadow: 7px 7px 0 var(--yellow); }
        .closing { margin-top: 48mm; padding: 12mm; }
        .soft-sales { display: none; }
      }