:root {
        color-scheme: light dark;
        --bg: #f6f4ef;
        --surface: #ffffff;
        --surface-2: #efece4;
        --ink: #14263d;
        --ink-soft: #44566d;
        --navy: #0e2036;
        --navy-2: #16304f;
        --amber: #c97a10;
        --amber-strong: #b06a08;
        --amber-soft: #fbeed3;
        --line: #ddd6c7;
        --focus: #1d6fd1;
        --radius: 14px;
      }
      @media (prefers-color-scheme: dark) {
        :root {
          --bg: #0a1626;
          --surface: #102238;
          --surface-2: #0d1c30;
          --ink: #eef2f7;
          --ink-soft: #b3c0d0;
          --navy: #0a1828;
          --navy-2: #122a47;
          --amber: #f0b24a;
          --amber-strong: #f5c169;
          --amber-soft: #2b2110;
          --line: #2a3f58;
          --focus: #7db4f0;
        }
      }
      * { box-sizing: border-box; }
      html { scroll-behavior: smooth; }
      body {
        margin: 0;
        background: var(--bg);
        color: var(--ink);
        font-family: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        font-size: 1.0625rem;
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
      }
      a { color: var(--amber-strong); }
      a:focus-visible, summary:focus-visible {
        outline: 3px solid var(--focus);
        outline-offset: 2px;
        border-radius: 4px;
      }
      h1, h2, h3 {
        font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
        line-height: 1.15;
        margin: 0;
        letter-spacing: -0.01em;
      }
      h2 { font-size: 1.75rem; font-weight: 700; }
      h3 { font-size: 1.2rem; font-weight: 600; }
      p { margin: 0; }
      .wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

      /* ---------- Site header ---------- */
      .topbar {
        position: sticky;
        top: 0;
        z-index: 60;
        background: var(--navy);
        color: #f3f6fa;
        border-bottom: 3px solid var(--amber);
      }
      .topbar .wrap {
        display: flex;
        align-items: center;
        gap: 8px 22px;
        flex-wrap: wrap;
        padding-top: 4px;
        padding-bottom: 4px;
        position: relative;
      }
      .wordmark {
        font-family: "Source Serif 4", Georgia, serif;
        font-weight: 700;
        font-size: 1.15rem;
        color: #ffffff;
        text-decoration: none;
        padding: 10px 0;
        white-space: nowrap;
      }
      .wordmark span { color: var(--amber); }
      .nav-toggle {
        display: none;
        margin-left: auto;
        background: transparent;
        border: 1px solid rgba(255,255,255,0.35);
        border-radius: 8px;
        color: #ffffff;
        width: 48px;
        height: 48px;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        flex-shrink: 0;
      }
      .nav-toggle:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
      .nav-toggle .bars { display: flex; flex-direction: column; gap: 5px; }
      .nav-toggle .bars span { display: block; width: 22px; height: 2px; background: #ffffff; border-radius: 2px; }
      .topnav {
        display: flex;
        flex-wrap: wrap;
        gap: 2px 4px;
        margin-left: auto;
      }
      .topnav a {
        color: #dbe5f0;
        text-decoration: none;
        font-size: 0.95rem;
        font-weight: 500;
        padding: 12px 10px;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        border-radius: 6px;
      }
      .topnav a:hover { color: #ffffff; background: rgba(255,255,255,0.08); }
      @media (max-width: 719px) {
        .nav-toggle { display: inline-flex; }
        .topnav {
          display: none;
          width: 100%;
          flex-direction: column;
          align-items: stretch;
          margin-left: 0;
          padding: 6px 0 12px;
          gap: 2px;
        }
        .topnav.open { display: flex; }
        .topnav a { width: 100%; padding: 12px 8px; }
      }

      /* ---------- Hero ---------- */
      .hero { padding: 52px 0 44px; }
      .hero h1 {
        font-size: clamp(2.3rem, 6vw, 3.4rem);
        font-weight: 700;
        color: var(--ink);
      }
      .hero .purpose {
        margin-top: 18px;
        font-size: 1.2rem;
        line-height: 1.55;
        color: var(--ink-soft);
        max-width: 46rem;
      }
      .hero .purpose strong { color: var(--ink); font-weight: 600; }
      .price-line {
        margin-top: 26px;
        font-size: 1.35rem;
        font-weight: 700;
        color: var(--ink);
      }
      .price-line .per { font-weight: 500; color: var(--ink-soft); font-size: 1.05rem; }
      .cta-row { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
      .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 54px;
        padding: 14px 28px;
        border-radius: 10px;
        background: var(--amber);
        color: #1c1503;
        font-weight: 700;
        font-size: 1.05rem;
        text-decoration: none;
        border: 2px solid transparent;
        transition: background 0.15s ease, transform 0.15s ease;
      }
      .btn:hover { background: var(--amber-strong); color: #ffffff; }
      @media (prefers-color-scheme: dark) {
        .btn { color: #1a1204; }
        .btn:hover { color: #14100a; background: var(--amber-strong); }
      }

      /* ---------- Sections ---------- */
      section { padding: 40px 0; }
      .section-head { margin-bottom: 22px; }
      .section-head p { margin-top: 8px; color: var(--ink-soft); max-width: 44rem; }

      .steps {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
        list-style: none;
        margin: 0;
        padding: 0;
        counter-reset: step;
      }
      .steps li {
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 22px 22px 22px 74px;
        position: relative;
        min-height: 44px;
      }
      .steps li::before {
        counter-increment: step;
        content: counter(step);
        position: absolute;
        left: 20px;
        top: 20px;
        width: 38px;
        height: 38px;
        border-radius: 50%;
        background: var(--navy);
        color: #ffffff;
        font-weight: 700;
        font-size: 1.1rem;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      @media (prefers-color-scheme: dark) {
        .steps li::before { background: var(--amber); color: #1a1204; }
      }
      .steps p { font-size: 1.05rem; }

      .sample {
        margin-top: 22px;
        background: var(--amber-soft);
        border: 1px dashed var(--amber);
        border-radius: var(--radius);
        padding: 22px;
      }
      .sample .tag {
        display: inline-block;
        font-size: 0.8rem;
        font-weight: 700;
        letter-spacing: 0.06em;
        text-transform: uppercase;
        color: var(--amber-strong);
        margin-bottom: 8px;
      }
      .sample p { font-size: 1.05rem; }
      .sample .note { margin-top: 10px; font-size: 0.9rem; color: var(--ink-soft); font-style: italic; }

      /* ---------- Numbers strip ---------- */
      .numbers {
        background: var(--navy);
        color: #eef2f7;
        border-radius: var(--radius);
        padding: 28px 24px;
      }
      .numbers h2 { color: #ffffff; margin-bottom: 18px; }
      .numbers .stat { font-size: 1.12rem; line-height: 1.55; }
      .numbers .stat + .stat { margin-top: 16px; }
      .numbers .stat strong { color: var(--amber); }
      .numbers .caveat {
        margin-top: 18px;
        font-size: 0.85rem;
        line-height: 1.5;
        color: #b9c7d8;
      }

      /* ---------- For / not for ---------- */
      .fit-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .fit-card {
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 24px;
      }
      .fit-card h3 { margin-bottom: 12px; }
      .fit-card ul { margin: 0; padding-left: 20px; }
      .fit-card li { margin-bottom: 8px; }
      .fit-card li:last-child { margin-bottom: 0; }
      .boundary {
        margin-top: 20px;
        background: var(--surface-2);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 20px 22px;
        font-size: 1.02rem;
      }
      .boundary a { font-weight: 600; }

      /* ---------- Price box ---------- */
      .price-box {
        background: var(--surface);
        border: 2px solid var(--navy);
        border-radius: var(--radius);
        padding: 28px 24px;
      }
      @media (prefers-color-scheme: dark) {
        .price-box { border-color: var(--amber); }
      }
      .price-box .big { font-size: 1.5rem; font-weight: 700; line-height: 1.35; }
      .price-box p { margin-top: 14px; }
      .price-box ul { margin: 10px 0 0; padding-left: 20px; }
      .price-box li { margin-bottom: 6px; }
      .price-box .guarantee { font-weight: 600; }

      /* ---------- Demos ---------- */
      .demo-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .demo-card {
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 24px;
        display: flex;
        flex-direction: column;
        gap: 10px;
      }
      .demo-card h3 { font-size: 1.3rem; }
      .demo-card .badge {
        align-self: flex-start;
        font-size: 0.8rem;
        font-weight: 700;
        letter-spacing: 0.04em;
        text-transform: uppercase;
        background: var(--amber-soft);
        color: var(--amber-strong);
        border: 1px solid var(--amber);
        border-radius: 999px;
        padding: 4px 12px;
      }
      .demo-card p { color: var(--ink-soft); font-size: 0.98rem; }
      .demo-card a.open {
        margin-top: auto;
        display: inline-flex;
        align-items: center;
        min-height: 48px;
        font-weight: 700;
        text-decoration: none;
      }
      .demo-card a.open:hover { text-decoration: underline; }

      /* ---------- FAQ ---------- */
      .faq { display: flex; flex-direction: column; gap: 12px; }
      .faq details {
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: var(--radius);
      }
      .faq summary {
        cursor: pointer;
        list-style: none;
        padding: 18px 22px;
        min-height: 44px;
        font-weight: 600;
        font-size: 1.08rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 12px;
      }
      .faq summary::-webkit-details-marker { display: none; }
      .faq summary::after {
        content: "+";
        font-size: 1.5rem;
        font-weight: 400;
        color: var(--amber-strong);
        line-height: 1;
        flex-shrink: 0;
      }
      .faq details[open] summary::after { content: "–"; }
      .faq details p {
        padding: 0 22px 20px;
        color: var(--ink-soft);
      }

      /* ---------- Final CTA ---------- */
      .final-cta {
        background: var(--navy);
        color: #eef2f7;
        border-radius: var(--radius);
        padding: 34px 24px;
        text-align: center;
      }
      .final-cta h2 { color: #ffffff; margin-bottom: 10px; }
      .final-cta p { color: #c4d2e2; max-width: 34rem; margin: 0 auto; }
      .final-cta .cta-row { justify-content: center; margin-top: 22px; }
      .final-cta .direct { margin-top: 16px; font-size: 0.98rem; color: #c4d2e2; }
      .final-cta .direct a { color: var(--amber); font-weight: 600; }

      /* ---------- Footer ---------- */
      footer {
        margin-top: 48px;
        border-top: 1px solid var(--line);
        padding: 34px 0 44px;
      }
      footer h2 { font-size: 1.25rem; margin-bottom: 14px; }
      footer h3 { font-size: 1.05rem; margin-bottom: 10px; }
      .footer-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 28px;
        margin-bottom: 24px;
      }
      @media (min-width: 720px) {
        .footer-grid { grid-template-columns: 1fr 1.4fr; }
      }
      .sitemap-list, .tool-list {
        list-style: none;
        margin: 0;
        padding: 0;
        display: grid;
        grid-template-columns: 1fr;
        gap: 2px;
      }
      .sitemap-list a, .tool-list a {
        display: inline-flex;
        align-items: center;
        min-height: 44px;
        padding: 8px 0;
        font-weight: 500;
        text-decoration: none;
      }
      .sitemap-list a:hover, .tool-list a:hover { text-decoration: underline; }
      .tool-list .here { color: var(--ink-soft); font-weight: 400; font-size: 0.9rem; margin-left: 8px; }
      .footer-line { color: var(--ink-soft); font-size: 0.95rem; margin-top: 8px; }
      .footer-line a { color: var(--ink-soft); }
      .footer-small { color: var(--ink-soft); font-size: 0.88rem; margin-top: 6px; }

      /* ---------- Chat widget ---------- */
      .nb-chat-btn {
        position: fixed; right: 20px; bottom: 20px; z-index: 90;
        width: 60px; height: 60px; border-radius: 50%;
        background: var(--navy); color: #fff; border: 2px solid var(--amber);
        box-shadow: 0 8px 24px rgba(0,0,0,0.28);
        display: flex; align-items: center; justify-content: center;
        cursor: pointer;
      }
      .nb-chat-btn:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
      .nb-chat-btn svg { width: 28px; height: 28px; }
      .nb-chat-panel {
        position: fixed; right: 20px; bottom: 92px; z-index: 91;
        width: 384px; max-width: calc(100vw - 32px);
        height: 560px; max-height: calc(100dvh - 112px);
        background: var(--surface); color: var(--ink);
        border: 1px solid var(--line); border-radius: 16px;
        box-shadow: 0 18px 48px rgba(0,0,0,0.30);
        display: flex; flex-direction: column; overflow: hidden;
      }
      .nb-chat-panel[hidden] { display: none; }
      .nb-chat-head {
        background: var(--navy); color: #fff; padding: 14px 16px;
        display: flex; align-items: center; gap: 10px;
      }
      .nb-chat-head strong { font-size: 1rem; line-height: 1.3; }
      .nb-chat-head span { display: block; font-size: 0.82rem; color: #c4d2e2; font-weight: 400; }
      .nb-chat-close {
        margin-left: auto; background: transparent; border: 1px solid rgba(255,255,255,0.4);
        color: #fff; width: 40px; height: 40px; border-radius: 8px; font-size: 1.25rem;
        cursor: pointer; flex-shrink: 0; line-height: 1;
      }
      .nb-chat-close:focus-visible, .nb-chip:focus-visible, .nb-chat-send:focus-visible, .nb-chat-input:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
      .nb-chat-messages {
        flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px;
        background: var(--bg);
      }
      .nb-msg { max-width: 88%; padding: 10px 13px; border-radius: 12px; font-size: 0.95rem; line-height: 1.5; white-space: pre-wrap; word-wrap: break-word; }
      .nb-msg.bot { background: var(--surface); border: 1px solid var(--line); color: var(--ink); align-self: flex-start; border-bottom-left-radius: 4px; }
      .nb-msg.user { background: var(--navy); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
      @media (prefers-color-scheme: dark) { .nb-msg.user { background: var(--navy-2); } }
      .nb-msg .nb-mailto {
        display: inline-flex; align-items: center; min-height: 44px; margin-top: 10px;
        background: var(--amber); color: #1c1503; font-weight: 700; text-decoration: none;
        padding: 10px 16px; border-radius: 8px;
      }
      .nb-chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 12px 4px; background: var(--surface); }
      .nb-chip {
        border: 1px solid var(--navy); background: var(--surface); color: var(--ink);
        border-radius: 999px; padding: 9px 14px; min-height: 40px; font-size: 0.9rem; font-weight: 600; cursor: pointer;
      }
      @media (prefers-color-scheme: dark) { .nb-chip { border-color: var(--amber); } }
      .nb-chip:hover { background: var(--amber-soft); }
      .nb-chat-form { display: flex; gap: 8px; padding: 12px; background: var(--surface); border-top: 1px solid var(--line); }
      .nb-chat-input {
        flex: 1; min-width: 0; padding: 11px 12px; border: 1px solid var(--line); border-radius: 10px;
        font: inherit; font-size: 0.98rem; background: var(--surface); color: var(--ink); min-height: 48px;
      }
      .nb-chat-send {
        background: var(--amber); color: #1c1503; border: none; border-radius: 10px;
        padding: 0 18px; font-weight: 700; cursor: pointer; min-height: 48px; font-size: 0.98rem;
      }
      @media (max-width: 640px) {
        .nb-chat-panel { right: 12px; left: 12px; bottom: 12px; top: 12px; width: auto; max-width: none; height: auto; max-height: none; }
        .nb-chat-btn { right: 16px; bottom: 16px; }
      }

      @media (min-width: 720px) {
        .steps { grid-template-columns: repeat(3, 1fr); }
        .steps li { padding: 64px 20px 22px; }
        .steps li::before { top: 18px; left: 20px; }
        .fit-grid { grid-template-columns: 1fr 1fr; }
        .demo-grid { grid-template-columns: 1fr 1fr; }
        .tool-list { grid-template-columns: 1fr 1fr; }
        .hero { padding: 72px 0 56px; }
        section { padding: 48px 0; }
      }
      @media (prefers-reduced-motion: reduce) {
        html { scroll-behavior: auto; }
        .btn { transition: none; }
      }

/* ---------- Standalone site additions ---------- */
.btn.secondary {
  background: transparent;
  border-color: var(--navy);
  color: var(--ink);
}
.btn.secondary:hover { background: var(--navy); color: #ffffff; }
@media (prefers-color-scheme: dark) {
  .btn.secondary { border-color: var(--amber); color: var(--ink); }
  .btn.secondary:hover { background: var(--amber); color: #1a1204; }
}
.buy-note { margin-top: 12px; font-size: 0.92rem; color: var(--ink-soft); }
.contact-card {
  background: var(--surface);
  border: 2px solid var(--navy);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
}
@media (prefers-color-scheme: dark) { .contact-card { border-color: var(--amber); } }
.contact-card .big-email { font-size: 1.35rem; font-weight: 700; word-break: break-all; }
.contact-card p { margin-top: 12px; color: var(--ink-soft); }
.page-intro { padding: 44px 0 8px; }
.page-intro h1 { font-size: clamp(2rem, 5vw, 2.8rem); font-weight: 700; }
.page-intro p { margin-top: 14px; font-size: 1.15rem; color: var(--ink-soft); max-width: 44rem; }