* {
      box-sizing: border-box;
      border-radius: 0 !important;
    }

    html {
      scroll-behavior: smooth;
      /* Keep anchored sections clear of the sticky header + menu bar. */
      scroll-padding-top: 124px;
    }

    body {
      margin: 0;
      color: var(--text);
      background: var(--page);
      font-family: var(--font-ui);
      font-size: 15px;
      line-height: 1.5;
    }

    button,
    input,
    textarea {
      font: inherit;
    }

    button,
    a {
      touch-action: manipulation;
    }

    .skip-link {
      position: fixed;
      top: 8px;
      left: 8px;
      z-index: 200;
      padding: 10px 12px;
      color: var(--white);
      background: var(--accent-dark);
      border: 1px solid var(--white);
      transform: translateY(-160%);
      transition: transform 0.15s ease;
    }

    .skip-link:focus-visible {
      color: var(--white);
      transform: translateY(0);
    }

    a {
      color: #204f80;
    }

    a:hover {
      color: #12385d;
    }

    code {
      font-family: var(--font-mono);
    }

    h1,
    h2,
    h3,
    p {
      margin-top: 0;
    }

    h1 {
      margin-bottom: 12px;
      font-size: clamp(36px, 7vw, 62px);
      line-height: 1;
      letter-spacing: -0.04em;
    }

    h2 {
      margin-bottom: 0;
      font-size: 24px;
      line-height: 1.2;
    }

    h3 {
      margin-bottom: 7px;
      font-size: 16px;
    }

    .sticky-top {
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 2px 8px rgba(35, 35, 30, 0.16);
    }

    .site-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-height: 72px;
      padding: 12px clamp(16px, 5vw, 72px);
      background: #f3f2ed;
      border-bottom: 1px solid var(--border);
    }

    .brand {
      display: flex;
      align-items: center;
      min-width: 0;
      gap: 11px;
    }

    .brand-mark,
    .window-icon,
    .step-number,
    .info-icon {
      display: grid;
      place-items: center;
      color: var(--white);
      background: linear-gradient(#6987a6, var(--accent));
      border: 1px solid var(--accent-dark);
      box-shadow: inset 1px 1px 0 #9fb2c4;
      font-weight: 700;
    }

    .brand-mark {
      width: 40px;
      height: 40px;
      font-size: 21px;
    }

    /* "Nχ" monogram: N in the UI sans, χ (susceptibility) in italic serif so it
       reads as the mathematical symbol. */
    .brand-mark .mk,
    .window-icon .mk {
      display: inline-flex;
      align-items: baseline;
      line-height: 1;
      letter-spacing: -0.5px;
    }

    .brand-mark .chi,
    .window-icon .chi {
      font-family: Georgia, "Times New Roman", serif;
      font-style: italic;
      font-weight: 700;
      /* χ has a descender and sits below the cap "N"; lift it to align. */
      position: relative;
      top: -0.11em;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 700;
      line-height: 1.05;
    }

    .brand-byline,
    .muted,
    .help-text {
      color: var(--muted);
    }

    .brand-byline,
    .help-text {
      font-size: 12px;
    }

    .launch-status {
      display: flex;
      align-items: center;
      gap: 7px;
      color: #505049;
      font-size: 13px;
    }

    .status-lamp {
      width: 10px;
      height: 10px;
      background: #d2a83d;
      border: 1px solid #806a2c;
    }

    .header-actions {
      display: inline-flex;
      flex: 0 0 auto;
      align-items: center;
      gap: 14px;
    }

    .menu-bar {
      display: flex;
      align-items: stretch;
      justify-content: space-between;
      min-height: 42px;
      padding: 0 clamp(16px, 5vw, 72px);
      background: linear-gradient(
        var(--titlebar-top),
        var(--titlebar-bottom)
      );
      border-bottom: 1px solid var(--border);
      box-shadow: inset 0 1px 0 var(--white);
    }

    .menu-links {
      display: flex;
    }

    .menu-links a {
      display: flex;
      align-items: center;
      min-height: 42px;
      padding: 8px 14px;
      color: var(--text);
      border-left: 1px solid transparent;
      border-right: 1px solid transparent;
      text-decoration: none;
      white-space: nowrap;
      font-size: 13px;
    }

    .menu-links a:hover {
      background: #f7f6f2;
      border-color: var(--border-soft);
    }

    /* Hamburger toggle — hidden on desktop, shown on mobile via the media query. */
    .menu-toggle {
      display: none;
      position: relative;
      align-items: center;
      justify-content: center;
      width: 42px;
      min-width: 42px;
      min-height: 42px;
      padding: 7px;
      background: transparent;
      border: 1px solid transparent;
      color: var(--text);
      font-size: 13px;
      font-weight: 700;
      cursor: pointer;
      -webkit-tap-highlight-color: transparent;
      transition:
        background 0.14s ease,
        border-color 0.14s ease,
        box-shadow 0.14s ease,
        transform 0.1s ease;
    }

    .menu-toggle:hover,
    .menu-toggle[aria-expanded="true"] {
      background: #f7f6f2;
      border-color: var(--border-soft);
    }

    .menu-toggle[aria-expanded="true"] {
      box-shadow: inset 1px 1px 2px #c7c5be;
    }

    .menu-toggle:active {
      transform: translateY(1px) scale(0.94);
      background: #e5e4dd;
      border-color: var(--border);
      box-shadow: inset 1px 1px 3px #aaa9a2;
    }

    .menu-ico {
      width: 20px;
      height: 20px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2;
      stroke-linecap: round;
      transition: transform 0.1s ease, stroke-width 0.1s ease;
    }

    .menu-toggle[aria-expanded="true"] .menu-ico {
      transform: scale(0.94);
    }

    .menu-toggle:active .menu-ico {
      transform: scale(0.8);
      stroke-width: 2.4;
    }

    .build-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      padding-left: 18px;
      color: var(--muted);
      font-size: 12px;
      white-space: nowrap;
    }

    .page-shell {
      width: min(1040px, calc(100% - 32px));
      margin: 28px auto 42px;
    }

    .window,
    .section,
    .info-panel {
      background: var(--panel);
      border: 1px solid var(--border);
      box-shadow: 2px 2px 0 var(--shadow);
    }

    .window-titlebar,
    .step-titlebar {
      display: flex;
      align-items: center;
      min-height: 36px;
      gap: 8px;
      padding: 5px 9px;
      background: linear-gradient(
        var(--titlebar-top),
        var(--titlebar-bottom)
      );
      border-bottom: 1px solid var(--border);
      box-shadow: inset 0 1px 0 var(--white);
      font-size: 13px;
      font-weight: 700;
    }

    /* One titlebar heading treatment everywhere (product window, step panels,
       support modal) — same size, weight, and vertical centering. */
    .window-titlebar > span:not(.window-icon),
    .step-titlebar h3 {
      min-width: 0;
      margin: 0;
      font-size: 16px;
      line-height: 1;
      font-weight: 700;
    }

    .modal .window-titlebar > span:not(.window-icon) {
      overflow-wrap: anywhere;
    }

    .window-icon {
      width: 22px;
      height: 22px;
      font-size: 12px;
    }

    .hero-content {
      padding: clamp(26px, 5vw, 58px);
    }

    .eyebrow,
    .section-kicker {
      margin-bottom: 5px;
      color: var(--accent-dark);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .lead {
      max-width: 680px;
      margin-bottom: 14px;
      font-size: 19px;
    }

    .hero-content > p:not(.eyebrow):not(.lead):not(.release-note) {
      max-width: 720px;
      margin-bottom: 7px;
      color: #4d4c46;
    }

    .section {
      margin-top: 24px;
      padding: clamp(20px, 4vw, 34px);
    }

    .section-heading {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 18px;
    }

    .badge {
      padding: 4px 8px;
      color: #5b4b17;
      background: var(--warning);
      border: 1px solid #8a7431;
      font-size: 12px;
      white-space: nowrap;
    }

    .button {
      min-height: 44px;
      padding: 7px 13px;
      color: var(--text);
      background: linear-gradient(#f8f7f2, #d9d8d0);
      border: 1px solid var(--border);
      box-shadow: inset 1px 1px 0 var(--white);
      cursor: pointer;
      text-decoration: none;
    }

    .button:hover:not(:disabled):not([aria-disabled="true"]) {
      color: var(--text);
      background: #faf9f5;
    }

    .button:active:not(:disabled):not([aria-disabled="true"]) {
      background: #d6d5ce;
      box-shadow: inset 1px 1px 0 #b6b4ad;
    }

    .button:disabled,
    .button[aria-disabled="true"] {
      color: #898880;
      cursor: not-allowed;
    }

    .primary-button,
    .recommended-download {
      color: var(--white) !important;
      background: linear-gradient(#6987a6, var(--accent));
      border-color: var(--accent-dark);
      box-shadow: inset 1px 1px 0 #9fb2c4;
      font-weight: 700;
    }

    .primary-button {
      width: 100%;
      min-height: 44px;
    }

    /* Keep highlighted buttons readable on hover/active (white text stays on a
       blue surface instead of the generic near-white button hover). */
    .primary-button:hover:not(:disabled):not([aria-disabled="true"]),
    .recommended-download:hover:not(:disabled):not([aria-disabled="true"]) {
      color: var(--white);
      background: linear-gradient(#7a97b5, #567a9d);
    }

    .primary-button:active:not(:disabled):not([aria-disabled="true"]),
    .recommended-download:active:not(:disabled):not([aria-disabled="true"]) {
      background: linear-gradient(var(--accent), var(--accent-dark));
      box-shadow: inset 1px 1px 0 #4a648092;
    }

    .os-logo {
      flex: 0 0 auto;
    }

    .download-area {
      max-width: 720px;
      margin-top: 20px;
      padding-top: 18px;
      border-top: 1px solid var(--border-soft);
    }

    .download-title {
      margin-bottom: 10px;
      font-size: 16px;
    }

    .download-buttons {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
    }

    .download-button {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 44px;
      text-align: center;
    }

    .download-status,
    .inline-status,
    .form-status,
    .error-text {
      min-height: 18px;
      margin: 6px 0 0;
      font-size: 12px;
    }

    .release-note {
      max-width: 720px;
      margin: 18px 0 0;
      padding: 9px 11px;
      background: #e5e7e9;
      border: 1px solid var(--border-soft);
      box-shadow: inset 1px 1px 0 var(--white);
      font-size: 13px;
    }

    .plan-strip {
      display: grid;
      grid-template-columns: minmax(240px, 1.1fr) 2fr;
      background: var(--panel-2);
      border: 1px solid var(--border);
    }

    .plan-summary {
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 18px;
      border-right: 1px solid var(--border);
    }

    .plan-summary span {
      margin-top: 4px;
      color: var(--muted);
      font-size: 12px;
    }

    .plan-facts {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      margin: 0;
    }

    .plan-facts div {
      padding: 12px 14px;
      border-right: 1px solid var(--border-soft);
    }

    .plan-facts div:last-child {
      border-right: 0;
    }

    .plan-facts dt {
      color: var(--muted);
      font-size: 11px;
      text-transform: uppercase;
    }

    .plan-facts dd {
      margin: 3px 0 0;
      font-weight: 700;
    }

    .activation-grid,
    .notice-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
      margin-top: 18px;
    }

    .step-panel,
    .notice-box {
      min-width: 0;
      background: #fbfaf6;
      border: 1px solid var(--border);
    }

    .step-number {
      width: 22px;
      height: 22px;
      font-size: 12px;
    }

    .step-body,
    .notice-box {
      padding: 18px;
    }

    .field-intro {
      margin-bottom: 15px;
      font-weight: 700;
    }

    .wallet-box {
      padding: 12px;
      background: var(--panel-2);
      border: 1px solid var(--border-soft);
    }

    .wallet-label {
      margin-bottom: 7px;
      color: var(--muted);
      font-size: 11px;
      text-transform: uppercase;
    }

    .wallet-row {
      display: flex;
      align-items: stretch;
      gap: 8px;
    }

    .wallet-row .button {
      flex: 0 0 auto;
      min-width: 56px;
    }

    .wallet-address {
      display: flex;
      align-items: center;
      min-width: 0;
      flex: 1;
      min-height: 44px;
      padding: 8px 9px;
      overflow-x: auto;
      overflow-y: hidden;
      white-space: nowrap;
      background: var(--white);
      border: 1px inset var(--border-soft);
      font-size: clamp(11px, 2.6vw, 13px);
      scrollbar-width: thin;
      -webkit-overflow-scrolling: touch;
    }

    .wallet-qr {
      display: none;
      justify-content: center;
      margin-top: 12px;
      padding: 10px;
      background: var(--white);
      border: 1px solid var(--border-soft);
    }

    .wallet-qr.is-visible {
      display: flex;
    }

    .wallet-qr img,
    .wallet-qr canvas {
      display: block;
    }

    .plain-link {
      display: inline-block;
      margin-top: 14px;
      font-size: 13px;
    }

    .disabled-link {
      color: #85847d;
      pointer-events: none;
      text-decoration: none;
    }

    .form-field {
      margin-bottom: 15px;
    }

    label {
      display: block;
      margin-bottom: 5px;
      font-size: 13px;
      font-weight: 700;
    }

    input {
      width: 100%;
      min-height: 44px;
      padding: 8px 9px;
      color: var(--text);
      background: var(--white);
      border: 1px solid var(--border);
      box-shadow: inset 1px 1px 0 #c7c5be;
    }

    input[aria-invalid="true"] {
      border-color: var(--danger);
    }

    input:focus,
    textarea:focus,
    button:focus-visible,
    a:focus-visible,
    .table-scroll:focus-visible {
      outline: 2px solid #1f5d99;
      outline-offset: 1px;
    }

    .error-text {
      color: var(--danger);
    }

    .notice-box p:last-child,
    .notice-box ul:last-child {
      margin-bottom: 0;
    }

    .notice-box ul {
      padding-left: 20px;
    }

    .notice-wide {
      grid-column: 1 / -1;
    }

    .section-copy {
      max-width: 800px;
      margin-bottom: 15px;
      color: #4d4c46;
    }

    .about-links {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
      margin-top: 12px;
    }

    .about-links a {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      font-weight: 700;
    }

    .about-links svg {
      width: 16px;
      height: 16px;
      flex: 0 0 auto;
    }

    .table-scroll {
      max-width: 100%;
      overflow-x: auto;
      overscroll-behavior-x: contain;
      -webkit-overflow-scrolling: touch;
    }

    .details-table {
      width: 100%;
      min-width: 560px;
      border-collapse: collapse;
      background: #fbfaf6;
      border: 1px solid var(--border);
      font-size: 14px;
    }

    .details-table th,
    .details-table td {
      padding: 10px 11px;
      text-align: left;
      vertical-align: top;
      border-right: 1px solid var(--border-soft);
      border-bottom: 1px solid var(--border-soft);
    }

    .details-table th:last-child,
    .details-table td:last-child {
      border-right: 0;
    }

    .details-table tr:last-child td {
      border-bottom: 0;
    }

    .details-table th {
      background: linear-gradient(
        var(--titlebar-top),
        var(--titlebar-bottom)
      );
      border-bottom-color: var(--border);
      box-shadow: inset 0 1px 0 var(--white);
      font-size: 12px;
    }

    .provider-name {
      font-weight: 700;
      white-space: nowrap;
    }

    .model-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .model-list code {
      display: inline-block;
      padding: 2px 5px;
      color: #273b50;
      background: #e7edf3;
      border: 1px solid #9db0c2;
      font-size: 13px;
    }

    .support-actions {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }

    .info-panel {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 14px;
      margin-top: 24px;
      padding: 18px 20px;
      background: var(--accent-light);
    }

    .info-icon {
      width: 28px;
      height: 28px;
      font-family: Georgia, serif;
    }

    .info-panel h2 {
      margin-bottom: 5px;
      font-size: 17px;
    }

    .info-panel p {
      margin-bottom: 0;
    }

    .site-footer {
      padding: 32px clamp(16px, 5vw, 72px) 22px;
      color: #55544d;
      background: #deddd6;
      border-top: 1px solid var(--border);
      font-size: 13px;
    }

    .footer-main,
    .footer-bar {
      width: min(1040px, 100%);
      margin-right: auto;
      margin-left: auto;
    }

    .footer-main {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      align-items: flex-start;
      gap: 28px 56px;
    }

    .footer-brandcol {
      min-width: 0;
    }

    .footer-linkcols {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, auto));
      gap: 20px 48px;
    }

    .footer-tagline {
      margin: 10px 0 0;
      font-size: 12px;
      line-height: 1.6;
      color: #4d4c46;
    }

    .footer-col {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 6px;
    }

    .footer-col-title {
      margin: 0 0 2px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--text);
    }

    .footer-col a {
      display: inline-flex;
      align-items: center;
      min-height: 32px;
      color: #3a4b5c;
      font-size: 13px;
    }

    .footer-col a:hover {
      color: #12385d;
    }

    .footer-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px 20px;
      margin-top: 28px;
      padding-top: 16px;
      border-top: 1px solid var(--border-soft);
    }

    /* Branded footer wordmark: serif "Nietz" + italic serif χ to match the mark. */
    .footer-brand {
      font-family: Georgia, "Times New Roman", serif;
      font-size: 22px;
      font-weight: 700;
      letter-spacing: 0.4px;
      color: var(--text);
    }

    .footer-brand .chi {
      font-style: italic;
      /* χ carries a descender, so lift it to sit on the text baseline. */
      position: relative;
      top: -0.09em;
    }

    textarea {
      width: 100%;
      min-height: 96px;
      padding: 8px 9px;
      color: var(--text);
      background: var(--white);
      border: 1px solid var(--border);
      box-shadow: inset 1px 1px 0 #c7c5be;
      font: inherit;
      resize: vertical;
    }

    /* ---- Customer support modal ------------------------------------- */
    .modal-overlay {
      position: fixed;
      inset: 0;
      z-index: 100;
      display: flex;
      align-items: flex-start;
      justify-content: center;
      padding: 40px 16px;
      overflow-y: auto;
      background: rgba(35, 35, 30, 0.5);
    }

    .modal-overlay[hidden] {
      display: none;
    }

    .modal {
      display: flex;
      flex-direction: column;
      width: min(560px, 100%);
      background: var(--panel);
      border: 1px solid var(--border);
      box-shadow: 4px 4px 0 var(--shadow);
    }

    .modal-close {
      display: grid;
      place-items: center;
      flex: 0 0 44px;
      width: 44px;
      height: 44px;
      margin-left: auto;
      padding: 0;
      color: var(--text);
      background: linear-gradient(#f8f7f2, #d9d8d0);
      border: 1px solid var(--border);
      box-shadow: inset 1px 1px 0 var(--white);
      cursor: pointer;
    }

    .modal-close:hover {
      background: #faf9f5;
    }

    /* True cross drawn as two stroked, round-capped lines so it stays
       perfectly centered and crisp regardless of the surrounding font. */
    .close-ico {
      width: 18px;
      height: 18px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
      pointer-events: none;
      transition: transform 0.18s ease;
    }

    .modal-body {
      min-height: 0;
      padding: 18px;
    }

    .modal-intro {
      margin-bottom: 16px;
    }

    .modal-troubleshoot {
      margin: 4px 0 16px;
      padding: 14px;
      background: var(--accent-light);
      border: 1px solid var(--border-soft);
    }

    .modal-disclaimer {
      margin: 4px 0 16px;
      padding: 14px;
      background: #f6ecd7;
      border: 1px solid #8a7431;
    }

    .modal-disclaimer h3 {
      color: #5b4b17;
    }

    .modal-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .modal-submit {
      width: auto;
      min-height: 44px;
    }

    .sr-result {
      margin-top: 16px;
      padding: 14px;
      background: var(--accent-light);
      border: 1px solid var(--border-soft);
    }

    .sr-result[hidden] {
      display: none;
    }

    .sr-result p {
      margin-bottom: 6px;
    }

    .sr-result p:last-child {
      margin-bottom: 0;
    }

    .sr-id {
      font-weight: 700;
      font-size: 15px;
    }

    @media (max-width: 920px) {
      .menu-bar {
        flex-wrap: wrap;
      }

      .menu-links,
      .build-meta {
        width: 100%;
      }

      .menu-links {
        justify-content: space-between;
      }

      .menu-links a {
        flex: 1;
        justify-content: center;
      }

      .build-meta {
        justify-content: flex-end;
        padding: 6px 0;
        border-top: 1px solid var(--border-soft);
      }

      .activation-grid {
        grid-template-columns: 1fr;
      }

      .footer-main {
        grid-template-columns: 1fr;
        gap: 22px;
      }

      .footer-brandcol {
        padding-bottom: 16px;
        border-bottom: 1px solid var(--border-soft);
      }

      .footer-linkcols {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
        gap: 12px 20px;
      }

      .footer-col {
        gap: 2px;
      }

      .footer-col a {
        min-height: 36px;
      }

      .footer-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        margin-top: 22px;
        padding-top: 14px;
      }

      .footer-copyright {
        max-width: 42ch;
        line-height: 1.5;
      }
    }

    @media (max-width: 760px) {
      .plan-strip,
      .notice-grid {
        grid-template-columns: 1fr;
      }

      .plan-summary {
        border-right: 0;
        border-bottom: 1px solid var(--border);
      }

      .plan-facts {
        grid-template-columns: repeat(2, 1fr);
      }

      .plan-facts div {
        border-right: 0;
        border-bottom: 1px solid var(--border-soft);
      }

      .plan-facts div:nth-child(odd) {
        border-right: 1px solid var(--border-soft);
      }

      .plan-facts div:nth-last-child(-n + 2) {
        border-bottom: 0;
      }

      .notice-wide {
        grid-column: auto;
      }

    }

    @media (max-width: 700px) {
      .section-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
      }

      .table-scroll {
        padding-bottom: 8px;
      }

      .details-table {
        min-width: 500px;
      }

      .details-table th:first-child,
      .details-table td:first-child {
        width: 32%;
      }

      .support-actions {
        align-items: stretch;
        flex-direction: column;
      }

      .support-actions .button {
        width: 100%;
      }
    }

    @media (max-width: 620px) {
      html {
        scroll-padding-top: 120px;
      }

      body {
        font-size: 15px;
      }

      .site-header {
        padding: 10px 12px;
      }

      .brand-mark {
        width: 36px;
        height: 36px;
      }

      .menu-toggle {
        display: inline-flex;
        width: 44px;
        min-width: 44px;
        min-height: 44px;
      }

      .menu-bar {
        display: none;
        padding: 6px 12px 8px;
      }

      .menu-bar.is-open {
        display: block;
      }

      .menu-links {
        display: flex;
        flex-direction: column;
        gap: 1px;
      }

      .menu-links a {
        justify-content: flex-start;
        min-height: 44px;
        padding: 9px 10px;
        background: var(--panel-2);
        border: 1px solid var(--border-soft);
        text-align: left;
        white-space: normal;
      }

      .build-meta {
        justify-content: space-between;
        gap: 8px;
      }

      .page-shell {
        width: calc(100% - 16px);
        margin-top: 12px;
      }

      .hero-content,
      .section {
        padding: 18px 14px;
      }

      .download-buttons {
        grid-template-columns: 1fr;
      }

      input,
      textarea {
        font-size: 16px;
      }

      .step-body,
      .notice-box {
        padding: 16px;
      }

      .info-panel {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 16px;
      }

      .modal-overlay {
        align-items: center;
        padding: 24px 12px;
        -webkit-overflow-scrolling: touch;
      }

      .modal {
        max-height: min(680px, calc(100vh - 48px));
        max-height: min(680px, calc(100dvh - 48px));
        overflow: hidden;
      }

      .modal .window-titlebar {
        flex: 0 0 auto;
        gap: 6px;
        min-height: 40px;
        padding: 4px 7px;
      }

      .modal .window-icon {
        width: 20px;
        height: 20px;
        font-size: 11px;
      }

      .modal-body {
        flex: 1 1 auto;
        overflow-y: auto;
        overscroll-behavior: contain;
        padding: 16px;
        -webkit-overflow-scrolling: touch;
      }

      .modal-close {
        flex-basis: 40px;
        width: 40px;
        height: 40px;
      }

      .modal-submit {
        width: 100%;
      }

      .site-footer {
        padding: 26px 16px 18px;
      }

      .footer-main {
        gap: 20px;
      }

      .footer-linkcols {
        width: 100%;
        gap: 12px;
      }

      .footer-col a {
        min-height: 36px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      .skip-link,
      .menu-toggle,
      .menu-ico {
        transition: none;
      }
    }

    /* ------------------------------------------------------------------
       Visual direction: scientific editorial

       The product interactions below retain the original, deliberately
       simple HTML structure. These rules give them a softer, research-led
       presentation with outlined modules, editorial type, and an abstract
       generative hero visual.
       ------------------------------------------------------------------ */
    * {
      border-radius: 0 !important;
    }

    html {
      /* Keep anchored sections clear of the sticky header when jumping to them. */
      scroll-padding-top: 104px;
    }

    body {
      /* Solid fallback; the real atmosphere lives on the fixed layer below. */
      background: #e7ffea;
      font-size: 16px;
      line-height: 1.42;
      letter-spacing: -0.015em;
      /* Crisper, lighter rendering for the display type — matches the thin,
         high-contrast grotesque look the layout is going for. */
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      text-rendering: optimizeLegibility;
      font-kerning: normal;
    }

    /* One continuous, viewport-fixed gradient behind the whole page — a soft
       green-to-blue "ambience" with two off-screen colour glows. Because it is
       fixed, the canvas stays put while panels scroll over it, so the page
       reads as framed content on one atmosphere rather than a stack of cards. */
    body::before {
      content: "";
      position: fixed;
      inset: 0;
      z-index: -1;
      background:
        radial-gradient(1100px 780px at 92% -8%, rgba(150, 205, 255, 0.42), transparent 62%),
        radial-gradient(940px 720px at 2% 110%, rgba(120, 214, 186, 0.36), transparent 60%),
        linear-gradient(157deg, #e8ffeb 0%, #e4f7ef 45%, #e2f1ff 100%);
    }

    /* Branded text selection. */
    ::selection {
      color: var(--white);
      background: var(--accent);
    }

    a {
      color: inherit;
    }

    a:hover {
      color: var(--accent-dark);
    }

    h1,
    h2 {
      /* Extra-light grotesque display weight, à la Isomorphic. */
      font-weight: 300;
    }

    h3 {
      font-weight: 400;
    }

    h1 {
      /* Lower floor so headings genuinely shrink on phones (was locked at 52px). */
      font-size: clamp(34px, 6.6vw, 102px);
      line-height: 0.92;
      letter-spacing: -0.06em;
    }

    h2 {
      font-size: clamp(26px, 3.7vw, 56px);
      line-height: 1;
      letter-spacing: -0.05em;
    }

    h3 {
      font-size: 23px;
      line-height: 1.08;
      letter-spacing: -0.045em;
    }

    .sticky-top {
      position: sticky;
      top: 0;
      z-index: 50;
      /* Persistent, glassy header so navigation stays within reach on long
         scrolls. The hairline only appears once the page has moved. */
      background: rgba(227, 255, 232, 0.72);
      -webkit-backdrop-filter: saturate(150%) blur(12px);
      backdrop-filter: saturate(150%) blur(12px);
      border-bottom: 1px solid transparent;
      box-shadow: none;
      transition: background 0.25s ease, border-color 0.25s ease;
    }

    .sticky-top.is-scrolled {
      background: rgba(227, 255, 232, 0.88);
      border-bottom-color: var(--border-soft);
    }

    /* No backdrop-filter support: fall back to a solid-enough bar. */
    @supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
      .sticky-top {
        background: rgba(227, 255, 232, 0.94);
      }
    }

    .site-header {
      min-height: 84px;
      padding: 16px 20px;
      background: transparent;
      border: 0;
    }

    .brand {
      gap: 3px;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      color: var(--text);
      background: transparent;
      border: 1px solid var(--border);
      border-radius: 6px 0 0 6px !important;
      box-shadow: none;
      font-size: 20px;
    }

    .brand > div:last-child {
      display: flex;
      align-items: stretch;
      min-height: 42px;
    }

    .brand-name,
    .brand-byline {
      display: flex;
      align-items: center;
      padding: 6px 10px;
      border: 1px solid var(--border);
      line-height: 1;
    }

    .brand-name {
      border-right: 0;
      font-size: 21px;
      font-weight: 400;
      letter-spacing: -0.06em;
    }

    .brand-byline {
      color: var(--text);
      border-radius: 0 6px 6px 0 !important;
      font-family: var(--font-mono);
      font-size: 10px;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .menu-bar {
      position: absolute;
      top: 16px;
      left: 50%;
      display: block;
      min-height: 0;
      padding: 0;
      transform: translateX(-50%);
      background: transparent;
      border: 0;
      box-shadow: none;
    }

    .menu-links {
      display: flex;
    }

    .menu-links a {
      justify-content: center;
      min-width: 128px;
      min-height: 42px;
      padding: 8px 17px;
      color: var(--text);
      border: 1px solid var(--border);
      border-right: 0;
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
    }

    .menu-links a:first-child {
      border-radius: 6px 0 0 6px !important;
    }

    .menu-links a:last-child {
      border-right: 1px solid var(--border);
      border-radius: 0 6px 6px 0 !important;
    }

    .menu-links a:hover,
    .menu-links a.is-active {
      color: var(--white);
      background: var(--accent-dark);
      border-color: var(--accent-dark);
    }

    .page-shell {
      width: min(1180px, calc(100% - 40px));
      margin: 64px auto 20px;
    }

    .section,
    .info-panel {
      border: 1px solid var(--border);
      border-radius: 20px !important;
      box-shadow: none;
      /* Near-transparent outlined frames: the fixed gradient shows straight
         through, so the border does the structuring and the gradient does the
         mood — no opaque card fills stacking up the page. */
      background: rgba(255, 255, 255, 0.05);
      -webkit-backdrop-filter: blur(4px) saturate(112%);
      backdrop-filter: blur(4px) saturate(112%);
    }

    .window-titlebar {
      display: none;
    }

    /* Hero: a two-up + wide-lower composition of transparent outlined cells.
       The scientific visual is positioned to cross the frames — an object in a
       scene, not a picture boxed inside a panel. */
    .window {
      position: relative;
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
      padding: 0;
      border: 0;
      background: transparent;
      overflow: hidden;
    }

    .hero-cell {
      position: relative;
      z-index: 1;
      border: 1px solid var(--border);
      border-radius: 20px !important;
      padding: clamp(28px, 3.4vw, 52px);
      background: rgba(255, 255, 255, 0.05);
      -webkit-backdrop-filter: blur(4px) saturate(112%);
      backdrop-filter: blur(4px) saturate(112%);
    }

    .hero-cell--headline {
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-height: 390px;
    }

    .hero-cell--wide {
      grid-column: 1 / -1;
    }

    .section-kicker {
      margin-bottom: 16px;
      color: var(--accent-dark);
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .hero-cell--headline h1 {
      max-width: 6ch;
    }

    .lead {
      max-width: 22ch;
    }

    .hero-desc {
      max-width: 60ch;
      margin: 0 0 6px;
      color: var(--text);
      font-size: clamp(15px, 1.4vw, 17px);
    }

    .hero-art {
      position: absolute;
      top: -8%;
      left: 39%;
      width: 70%;
      height: 84%;
      z-index: 0;
      pointer-events: none;
      background: none;
    }

    .hero-art::before,
    .hero-art::after {
      position: absolute;
      display: block;
      content: "";
      background:
        radial-gradient(ellipse at 31% 31%, rgba(247, 255, 255, 0.92) 0 5%, transparent 18%),
        radial-gradient(ellipse at 61% 38%, rgba(146, 224, 255, 0.96) 0 15%, rgba(31, 160, 211, 0.75) 32%, transparent 61%),
        radial-gradient(ellipse at 45% 79%, rgba(29, 146, 201, 0.85) 0 16%, transparent 46%),
        radial-gradient(ellipse at 78% 74%, rgba(213, 249, 255, 0.86) 0 11%, transparent 37%);
      filter: blur(1px) saturate(112%);
      opacity: 0.92;
      transform: rotate(-17deg);
    }

    .hero-art::before {
      top: 19%;
      left: 6%;
      width: 142%;
      height: 78%;
      border-radius: 46% 54% 51% 49% / 42% 36% 64% 58% !important;
      box-shadow:
        inset 34px 26px 47px rgba(237, 255, 255, 0.72),
        inset -28px -20px 50px rgba(8, 91, 146, 0.35),
        0 25px 60px rgba(0, 108, 173, 0.26);
    }

    .hero-art::after {
      top: 45%;
      left: -11%;
      width: 84%;
      height: 53%;
      border-radius: 58% 42% 40% 60% / 49% 56% 44% 51% !important;
      opacity: 0.68;
      transform: rotate(33deg);
      filter: blur(3px);
    }

    .download-area {
      max-width: none;
      margin-top: 28px;
      padding-top: 20px;
      border-top-color: var(--border);
    }

    .download-title {
      margin-bottom: 12px;
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .download-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .button {
      min-height: 42px;
      color: var(--text);
      background: transparent;
      border: 1px solid var(--border);
      border-radius: 5px !important;
      box-shadow: none;
      font-family: var(--font-mono);
      font-size: 11px;
      letter-spacing: 0.03em;
      transition: color 0.18s ease, background 0.18s ease, transform 0.18s ease;
    }

    .button:hover:not(:disabled):not([aria-disabled="true"]) {
      color: var(--white);
      background: var(--accent-dark);
    }

    .button:active:not(:disabled):not([aria-disabled="true"]) {
      box-shadow: none;
      transform: translateY(1px);
    }

    .download-button {
      flex: 1 1 150px;
      border-radius: 5px !important;
    }

    .primary-button,
    .recommended-download {
      color: var(--white) !important;
      background: var(--accent-dark);
      border-color: var(--accent-dark);
      box-shadow: none;
    }

    .primary-button:hover:not(:disabled):not([aria-disabled="true"]),
    .recommended-download:hover:not(:disabled):not([aria-disabled="true"]) {
      color: var(--text) !important;
      background: #a9e4dc;
      border-color: var(--text);
    }

    .section {
      position: relative;
      margin-top: 16px;
      padding: clamp(30px, 5vw, 58px);
      overflow: hidden;
      /* Background comes from the shared glass rule; per-section tints below. */
    }

    .section::before {
      position: absolute;
      top: 0;
      right: 0;
      width: 34%;
      height: 1px;
      content: "";
      background: var(--border);
    }

    /* No per-section colour fills. Every primary module shares the one
       near-transparent outlined frame defined above, so the continuous gradient
       scene — not the card — carries the mood, and borders alone do structure. */

    .section-heading {
      align-items: flex-start;
      margin-bottom: 28px;
    }

    .section-heading h2 {
      max-width: 12ch;
    }

    .badge {
      padding: 7px 9px;
      color: var(--text);
      background: transparent;
      border: 1px solid var(--border);
      border-radius: 4px !important;
      font-family: var(--font-mono);
      font-size: 10px;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    .section-copy {
      max-width: 62ch;
      color: var(--text);
      font-size: 17px;
      line-height: 1.35;
      letter-spacing: -0.025em;
    }

    .details-table {
      border-color: var(--border);
      border-radius: 8px !important;
      background: rgba(255, 254, 246, 0.42);
      font-size: 15px;
    }

    .details-table th,
    .details-table td {
      border-color: var(--border-soft);
    }

    .details-table th {
      background: rgba(223, 253, 228, 0.5);
      border-bottom-color: var(--border);
      box-shadow: none;
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 500;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .model-list code {
      color: var(--text);
      background: transparent;
      border-color: var(--border-soft);
      border-radius: 3px !important;
      font-size: 12px;
    }

    .notice-grid,
    .activation-grid {
      gap: 14px;
      margin-top: 22px;
    }

    .step-panel,
    .notice-box {
      background: rgba(255, 254, 246, 0.42);
      border-color: var(--border);
      border-radius: 10px !important;
    }

    .step-titlebar {
      min-height: 50px;
      padding: 10px 14px;
      background: transparent;
      border-bottom-color: var(--border);
      box-shadow: none;
    }

    .window-titlebar > span:not(.window-icon),
    .step-titlebar h3 {
      font-size: 20px;
      font-weight: 400;
      letter-spacing: -0.04em;
    }

    .step-number,
    .info-icon {
      color: var(--text);
      background: transparent;
      border-color: var(--border);
      box-shadow: none;
      font-family: var(--font-mono);
      font-size: 10px;
    }

    .wallet-box,
    .release-note,
    .modal-troubleshoot,
    .sr-result {
      background: rgba(224, 249, 231, 0.62);
      border-color: var(--border-soft);
      box-shadow: none;
    }

    .wallet-address,
    input,
    textarea {
      background: rgba(255, 254, 246, 0.7);
      border-color: var(--border);
      box-shadow: none;
      border-radius: 4px !important;
    }

    label {
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 500;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    .plan-strip {
      border-color: var(--border);
      border-radius: 10px !important;
      background: rgba(255, 254, 246, 0.42);
    }

    .plan-summary {
      border-right-color: var(--border);
      font-size: 19px;
      line-height: 1.1;
      letter-spacing: -0.03em;
    }

    .plan-facts div {
      border-right-color: var(--border-soft);
    }

    .plan-facts dt,
    .wallet-label,
    .footer-col-title {
      color: var(--muted);
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 500;
      letter-spacing: 0.06em;
    }

    .info-panel {
      margin-top: 16px;
      padding: clamp(26px, 4vw, 48px);
      background: rgba(214, 232, 255, 0.44);
      border-color: var(--border);
    }

    .info-panel h2 {
      font-size: clamp(26px, 3vw, 42px);
    }

    .site-footer {
      margin-top: 32px;
      padding: 46px 20px 24px;
      color: #e8f9eb;
      background: #142c28;
      border-top-color: var(--border);
    }

    .footer-main,
    .footer-bar {
      width: min(1180px, 100%);
    }

    .footer-brand {
      color: #e8f9eb;
      font-family: var(--font-ui);
      font-size: 44px;
      font-weight: 300;
      letter-spacing: -0.07em;
    }

    .footer-col-title {
      color: #9dc3aa;
    }

    .footer-col a,
    .footer-col a:hover,
    .footer-tagline,
    .footer-copyright {
      color: #e8f9eb;
    }

    .footer-bar,
    .footer-brandcol {
      border-color: #6c8b75;
    }

    .modal-overlay {
      background: rgba(18, 43, 38, 0.65);
    }

    .modal {
      background: #edfff0;
      border-color: var(--border);
      border-radius: 12px !important;
      box-shadow: none;
    }

    .modal .window-titlebar {
      display: flex;
      background: transparent;
      border-bottom-color: var(--border);
      box-shadow: none;
    }

    .modal-close {
      color: var(--text);
      background: transparent;
      border-color: var(--border);
      box-shadow: none;
      border-radius: 4px !important;
      transition:
        color 0.18s ease,
        background 0.18s ease,
        border-color 0.18s ease,
        transform 0.12s ease;
    }

    .modal-close:hover,
    .modal-close:focus-visible {
      color: var(--white);
      background: var(--accent-dark);
      border-color: var(--accent-dark);
    }

    .modal-close:hover .close-ico {
      transform: scale(1.08);
    }

    .modal-close:active {
      transform: translateY(1px) scale(0.96);
    }

    /* Below ~1040px the centered floating nav would crowd the brand, so it
       drops into a full-width in-flow pill under the header instead. In this
       band the header is not pinned (a sticky bar carrying the pill would eat
       too much vertical space); the desktop and mobile layouts stay sticky. */
    @media (max-width: 1040px) and (min-width: 681px) {
      html {
        scroll-padding-top: 28px;
      }

      .sticky-top {
        position: static;
        background: transparent;
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
        border-bottom-color: transparent;
      }

      .site-header {
        justify-content: flex-start;
      }

      .menu-bar {
        position: static;
        width: min(100% - 40px, 740px);
        margin: 4px auto 0;
        transform: none;
      }

      .menu-links a {
        min-width: 0;
        flex: 1;
      }

      .page-shell {
        margin-top: 32px;
      }
    }

    @media (min-width: 681px) and (max-width: 980px) {
      .hero-cell--headline {
        min-height: 320px;
      }
    }

    @media (max-width: 680px) {
      html {
        /* Clear the sticky mobile header (~68px) on anchor jumps. */
        scroll-padding-top: 84px;
      }

      .site-header {
        min-height: 68px;
        padding: 12px;
      }

      .brand-mark,
      .brand > div:last-child {
        min-height: 36px;
        height: 36px;
      }

      .brand-mark {
        width: 36px;
        height: 36px;
        font-size: 17px;
      }

      .brand-name {
        padding-right: 7px;
        padding-left: 7px;
        font-size: 18px;
      }

      .brand-byline {
        padding-right: 6px;
        padding-left: 6px;
        font-size: 8px;
      }

      .menu-toggle {
        display: inline-flex;
        color: var(--text);
        border-color: var(--border);
        border-radius: 5px !important;
      }

      .menu-bar,
      .menu-bar.is-open {
        /* In-flow dropdown under the header (not the absolute desktop nav). */
        position: static;
        display: none;
        width: calc(100% - 24px);
        margin: 0 12px;
        padding: 0;
        transform: none;
      }

      .menu-bar.is-open {
        display: block;
      }

      .menu-links {
        gap: 0;
      }

      .menu-links a,
      .menu-links a:first-child,
      .menu-links a:last-child {
        min-height: 40px;
        padding: 9px 11px;
        border-right: 1px solid var(--border);
        border-bottom: 0;
        border-radius: 0 !important;
      }

      .menu-links a:first-child {
        border-radius: 5px 0 0 5px !important;
      }

      .menu-links a:last-child {
        border-radius: 0 5px 5px 0 !important;
      }

      .page-shell {
        width: calc(100% - 24px);
        margin-top: 24px;
      }

      .window,
      .section,
      .info-panel {
        border-radius: 12px !important;
      }

      /* Mobile is a distinct composition: one column, the secondary cell
         dropped, the visual returned as its own self-contained band. */
      .window {
        grid-template-columns: 1fr;
        gap: 12px;
        overflow: visible;
      }

      .hero-cell {
        min-height: 0;
        padding: 26px 20px;
        border-radius: 12px !important;
      }

      .hero-cell--headline h1 {
        max-width: 9ch;
      }

      .hero-art {
        position: relative;
        top: auto;
        left: auto;
        width: 100%;
        height: 260px;
        border: 1px solid var(--border);
        border-radius: 12px !important;
        overflow: hidden;
      }

      .download-area {
        margin-bottom: 10px;
      }

      .section {
        padding: 30px 22px;
      }

      .section-heading {
        gap: 14px;
        margin-bottom: 23px;
      }

      .badge {
        align-self: flex-start;
      }

      .section-copy {
        font-size: 16px;
      }

      .download-buttons {
        display: grid;
        grid-template-columns: 1fr;
      }

      .plan-facts div:nth-child(odd) {
        border-right-color: var(--border-soft);
      }

      .modal-overlay {
        padding: 16px 12px;
      }
    }

    /* ------------------------------------------------------------------
       Content layout: asymmetric "info + cards" splits, so sections read
       as composed two-column layouts rather than a single stack of
       full-width cards. A descriptive column sits beside the detail.
       ------------------------------------------------------------------ */
    .split-layout {
      display: grid;
      grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
      gap: clamp(26px, 4vw, 60px);
      align-items: start;
    }

    .split-info {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 16px;
    }

    /* In the info column the gap owns the spacing, so drop the stock
       block margins on the pieces that land there. */
    .split-info .section-kicker,
    .split-info h2,
    .split-info .section-copy {
      margin: 0;
      max-width: none;
    }

    .split-info .badge {
      margin-top: 4px;
    }

    .provider-grid {
      display: grid;
      /* Full-width band: flow into as many columns as fit (2 up to 5). */
      grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
      gap: 14px;
    }

    .api-docs-intro {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      margin: -4px 0 34px;
      padding: 20px 0;
      border-top: 1px solid var(--border-soft);
      border-bottom: 1px solid var(--border-soft);
    }

    .api-docs-intro .section-copy {
      max-width: 760px;
      margin: 0;
    }

    .api-docs-intro .button {
      display: inline-flex;
      flex: 0 0 auto;
      min-height: var(--control-height);
      align-items: center;
      justify-content: center;
      text-align: center;
      line-height: 1.2;
    }

    .provider-card {
      display: flex;
      flex-direction: column;
      gap: 13px;
      padding: 22px;
      background: rgba(255, 254, 246, 0.42);
      border: 1px solid var(--border);
      border-radius: 12px !important;
    }

    .provider-card-name {
      margin: 0;
      font-size: 19px;
      line-height: 1;
      letter-spacing: -0.03em;
    }

    .provider-card .model-list {
      gap: 7px;
    }

    /* The About column reads better as two stacked notes than a cramped
       side-by-side pair inside the narrower right column. */
    .split-layout .notice-grid {
      margin-top: 0;
    }

    .about-cards {
      grid-template-columns: 1fr;
    }

    @media (max-width: 780px) {
      .split-layout {
        grid-template-columns: 1fr;
        gap: 24px;
      }
    }

    @media (max-width: 520px) {
      .provider-grid {
        grid-template-columns: 1fr;
      }

      .api-docs-intro {
        align-items: flex-start;
        flex-direction: column;
      }
    }

    /* ------------------------------------------------------------------
       Wide-screen composition

       The sections themselves form the desktop composition here. This is
       the part that prevents the page from becoming a vertical sequence of
       full-width cards: on a wide display it uses the whole canvas as a
       twelve-column grid, with each panel claiming a deliberate span.
       ------------------------------------------------------------------ */
    @media (min-width: 781px) {
      .page-shell {
        display: grid;
        grid-template-columns: repeat(12, minmax(0, 1fr));
        gap: 16px;
        width: calc(100% - clamp(32px, 4vw, 72px));
        max-width: none;
        margin-top: clamp(32px, 4vw, 68px);
        margin-bottom: 24px;
      }

      .page-shell > .window,
      .page-shell > .section,
      .page-shell > .info-panel {
        min-width: 0;
        margin-top: 0;
      }

      .page-shell > .window,
      .page-shell > #tech,
      .page-shell > #license,
      .page-shell > .info-panel {
        grid-column: 1 / -1;
      }

      .footer-main,
      .footer-bar {
        width: calc(100% - clamp(32px, 4vw, 72px));
        max-width: none;
      }
    }

    /* A medium desktop / landscape tablet keeps the hero and the detailed
       sections broad, while the short About and Support panels work as a
       balanced pair underneath. */
    @media (min-width: 781px) and (max-width: 1199px) {
      .page-shell > #about,
      .page-shell > #support {
        grid-column: span 6;
      }

      /* Hug the content instead of stretching to About's height — the leftover
         room below simply becomes the gradient canvas, not empty card space. */
      .page-shell > #support {
        align-self: start;
      }
    }

    /* The largest layout uses an intentionally asymmetric mosaic, similar
       to an editorial spread: a wide API panel beside a narrow details
       panel, then a slim support callout beside the license workflow. */
    @media (min-width: 1200px) {
      .page-shell > #tech {
        grid-column: span 7;
      }

      .page-shell > #about {
        grid-column: span 5;
      }

      .page-shell > #support {
        grid-column: span 4;
        align-self: start;
      }

      .page-shell > #license {
        grid-column: span 8;
      }

      #tech .split-layout {
        grid-template-columns: minmax(210px, 0.74fr) minmax(0, 1.26fr);
        gap: clamp(24px, 3vw, 48px);
      }

      #about .split-layout {
        grid-template-columns: 1fr;
        gap: 30px;
      }

      #about .about-cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      /* No forced height — the callout is as tall as its content, and the
         surrounding grid track shows the gradient rather than dead space. */
      #support .section-heading {
        margin-bottom: 24px;
      }
    }

    /* Below the tablet breakpoint the original document flow is the right
       behaviour: every panel gets the full readable width, and the
       content within each panel already collapses to one column. */
    @media (max-width: 780px) {
      .page-shell {
        display: block;
      }
    }

    /* ------------------------------------------------------------------
       Scroll-bound ambience scenes

       The reference changes atmosphere as the reader moves down the page.
       These full-width scenes do the same: their gradients travel with the
       content rather than sitting behind every section as one fixed wash.
       ------------------------------------------------------------------ */
    body {
      background: #edfff0;
    }

    body::before {
      display: none;
    }

    .page-shell {
      display: block;
      width: 100%;
      max-width: none;
      margin: 0;
    }

    .ambient-scene {
      position: relative;
      width: 100%;
      padding: clamp(34px, 5vw, 82px) 0;
      overflow: clip;
    }

    .ambient-scene--hero {
      padding-top: clamp(38px, 5vw, 78px);
      background:
        radial-gradient(60% 78% at 84% 55%, rgba(101, 201, 242, 0.31), transparent 67%),
        radial-gradient(44% 72% at 4% 92%, rgba(150, 239, 188, 0.34), transparent 72%),
        linear-gradient(158deg, #ebffed 0%, #e8f8ef 46%, #e5f4ff 100%);
    }

    .ambient-scene--platform {
      background:
        radial-gradient(52% 70% at 8% 38%, rgba(125, 210, 255, 0.31), transparent 70%),
        radial-gradient(48% 78% at 96% 72%, rgba(170, 244, 191, 0.31), transparent 72%),
        linear-gradient(168deg, #e6f6ff 0%, #effff0 53%, #e9ffed 100%);
    }

    .ambient-scene--access {
      background:
        radial-gradient(56% 68% at 92% 13%, rgba(255, 204, 181, 0.31), transparent 72%),
        radial-gradient(48% 76% at 8% 89%, rgba(121, 210, 243, 0.28), transparent 72%),
        linear-gradient(165deg, #edfff0 0%, #e9f6ff 49%, #edffef 100%);
    }

    .scene-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1fr;
      gap: 12px;
    }

    .scene-grid > .window,
    .scene-grid > .section,
    .scene-grid > .info-panel,
    .access-rail > .section,
    .access-rail > .info-panel {
      min-width: 0;
      margin-top: 0;
    }

    .access-rail {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    /* Let the scene show through the supporting panels while retaining enough
       contrast for dense model, payment, and form information. */
    .provider-card,
    .step-panel,
    .notice-box,
    .details-table,
    .plan-strip {
      background: rgba(255, 255, 255, 0.16);
    }

    .wallet-box,
    .release-note,
    .modal-troubleshoot,
    .sr-result {
      background: rgba(255, 255, 255, 0.2);
    }

    #support {
      color: #ebfff0;
      background:
        linear-gradient(142deg, rgba(13, 62, 53, 0.82), rgba(24, 103, 87, 0.74));
      border-color: #17463d;
    }

    #support .section-kicker,
    #support .section-copy,
    #support .help-text {
      color: #cdebd9;
    }

    #support .button {
      color: #ebfff0;
      border-color: #d9f5e1;
    }

    #support .button:hover {
      color: var(--text);
      background: #e9fff0;
    }

    @media (min-width: 781px) {
      .ambient-scene {
        padding-top: clamp(46px, 5vw, 82px);
        padding-bottom: clamp(46px, 5vw, 82px);
      }

      .scene-grid {
        grid-template-columns: repeat(12, minmax(0, 1fr));
        gap: 16px;
      }

      .ambient-scene--hero .window,
      .ambient-scene--platform #tech,
      .ambient-scene--platform #about,
      .ambient-scene--platform #api-documentation,
      .ambient-scene--access #license {
        grid-column: 1 / -1;
      }

      .ambient-scene--access .access-rail {
        display: grid;
        grid-column: 1 / -1;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
      }
    }

    @media (min-width: 1200px) {
      /* Tech + About pair up on the first row; the API band drops full-width
         beneath them. (DOM order is tech → api → about so that on phones the
         model cards read right after Tech; `order` restores the desktop pair.) */
      .ambient-scene--platform #tech {
        grid-column: span 7;
        order: 0;
      }

      .ambient-scene--platform #about {
        grid-column: span 5;
        order: 1;
      }

      .ambient-scene--platform #api-documentation {
        order: 2;
      }

      .ambient-scene--access .access-rail {
        display: flex;
        grid-column: span 4;
        grid-row: 1;
      }

      .ambient-scene--access #license {
        grid-column: span 8;
        grid-row: 1;
      }
    }

    @media (max-width: 680px) {
      .ambient-scene {
        padding-top: 26px;
        padding-bottom: 26px;
      }

      .ambient-scene--hero {
        padding-top: 24px;
      }

      .ambient-scene--hero .window {
        overflow: hidden;
      }

      .ambient-scene--hero .hero-cell {
        position: relative;
        z-index: 1;
      }

      .ambient-scene--hero .hero-art {
        position: absolute;
        z-index: 0;
        top: 0;
        bottom: 0;
        left: -22%;
        width: 144%;
        height: 100%;
        margin: 0;
        overflow: visible;
        border: 0;
        border-radius: 0 !important;
      }
    }

    /* Honour reduced-motion for the interactive polish added above. */
    @media (prefers-reduced-motion: reduce) {
      .sticky-top,
      .menu-links a,
      .button,
      .modal-close,
      .close-ico {
        transition: none;
      }
    }

    /* ------------------------------------------------------------------
       Mobile navigation and footer

       These follow the reference's structural pattern: a page-level
       backdrop sits underneath a separate fixed navigation surface. This is
       intentionally different from an in-flow dropdown, so the page remains
       an atmosphere behind the menu rather than a stack of panels below it.
       ------------------------------------------------------------------ */
    .visually-hidden {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
    }

    .mobile-nav-backdrop,
    .mobile-nav-overlay {
      display: none;
    }

    .site-footer {
      margin-top: 0;
      padding: clamp(28px, 4vw, 62px) clamp(20px, 4vw, 72px);
      color: #effff1;
      background: #393b39;
      border: 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: minmax(190px, 1.1fr) repeat(3, minmax(0, 1fr));
      gap: 16px;
      width: min(100%, 1680px);
      margin: 0 auto;
    }

    .footer-copyright-group {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 250px;
      padding: 4px 0;
    }

    .footer-brand {
      color: #effff1;
      font-size: clamp(38px, 4vw, 58px);
      font-weight: 300;
      line-height: 0.9;
      letter-spacing: -0.08em;
    }

    .footer-copyright {
      max-width: 23ch;
      color: rgba(239, 255, 241, 0.75);
      font-family: var(--font-mono);
      font-size: 10px;
      line-height: 1.45;
      letter-spacing: 0.03em;
      text-transform: uppercase;
    }

    .footer-panel {
      display: grid;
      grid-template-rows: auto 1fr;
      gap: 16px;
      min-height: 250px;
      padding: 20px;
      border: 1px solid rgba(239, 255, 241, 0.9);
      border-radius: 10px !important;
    }

    .footer-panel-title {
      margin: 0;
      color: rgba(239, 255, 241, 0.67);
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .footer-item-links {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      align-content: start;
      margin: 0 -1px -1px 0;
    }

    .footer-item-links a {
      display: grid;
      place-items: center;
      min-height: 52px;
      padding: 8px;
      margin: 0 -1px -1px 0;
      color: #effff1;
      border: 1px solid rgba(239, 255, 241, 0.9);
      font-family: var(--font-mono);
      font-size: 10px;
      line-height: 1.25;
      letter-spacing: 0.03em;
      text-align: center;
      text-decoration: none;
      text-transform: uppercase;
      transition: color 180ms ease, background-color 180ms ease;
    }

    .footer-item-links a:hover,
    .footer-item-links a:focus-visible {
      color: #26342a;
      background: #effff1;
      outline: none;
    }

    @media (max-width: 1080px) {
      .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .footer-copyright-group {
        grid-column: 1 / -1;
        min-height: 100px;
      }
    }

    @media (max-width: 680px) {
      .menu-bar,
      .menu-bar.is-open {
        display: none;
      }

      .mobile-nav-backdrop {
        position: fixed;
        z-index: 90;
        inset: 0;
        display: block;
        opacity: 0;
        pointer-events: none;
        background: rgba(225, 255, 233, 0.08);
        -webkit-backdrop-filter: blur(0) saturate(100%);
        backdrop-filter: blur(0) saturate(100%);
        transition: opacity 500ms ease, backdrop-filter 500ms ease;
      }

      .mobile-nav-backdrop.is-open {
        opacity: 1;
        pointer-events: auto;
        -webkit-backdrop-filter: blur(36px) saturate(115%);
        backdrop-filter: blur(36px) saturate(115%);
      }

      .mobile-nav-overlay {
        position: fixed;
        z-index: 100;
        inset: 0;
        display: flex;
        flex-direction: column;
        padding: 12px 20px 32px;
        opacity: 0;
        pointer-events: none;
        background: rgba(235, 255, 238, 0.02);
        transform: translateY(8px);
        transition: opacity 500ms ease, transform 500ms ease;
      }

      .mobile-nav-overlay.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
      }

      .mobile-nav-overlay[hidden],
      .mobile-nav-backdrop[hidden] {
        display: none;
      }

      .mobile-nav-overlay-head {
        display: flex;
        justify-content: flex-end;
        min-height: 44px;
      }

      .mobile-nav-close {
        display: grid;
        width: 44px;
        height: 44px;
        place-items: center;
        color: var(--text);
        background: rgba(255, 255, 255, 0.24);
        border: 1px solid var(--border);
        border-radius: 6px;
      }

      .mobile-nav-close svg {
        width: 19px;
        height: 19px;
        fill: none;
        stroke: currentColor;
        stroke-linecap: round;
        stroke-width: 1.8;
      }

      .mobile-nav-list {
        display: grid;
        gap: 0;
        margin-top: 24px;
      }

      .mobile-nav-list a {
        display: flex;
        align-items: center;
        min-height: 60px;
        padding: 12px 16px;
        margin-bottom: -1px;
        color: var(--text);
        background: rgba(255, 255, 255, 0.2);
        border: 1px solid var(--border);
        font-family: var(--font-mono);
        font-size: 12px;
        font-weight: 500;
        letter-spacing: 0.06em;
        text-decoration: none;
        text-transform: uppercase;
        opacity: 0;
        transform: translateX(-20px);
        transition: opacity 350ms ease, transform 350ms ease, background-color 180ms ease;
      }

      .mobile-nav-list a.is-visible {
        opacity: 1;
        transform: translateX(0);
      }

      .mobile-nav-list a:hover,
      .mobile-nav-list a:focus-visible {
        background: rgba(255, 255, 255, 0.5);
        outline: none;
      }

      body.mobile-nav-open {
        overflow: hidden;
      }

      .page-shell,
      .site-footer {
        transition: transform 500ms ease;
      }

      body.mobile-nav-open .page-shell,
      body.mobile-nav-open .site-footer {
        transform: translateY(-64px);
      }

      .site-footer {
        padding: 20px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 12px;
      }

      .footer-copyright-group {
        grid-column: auto;
        flex-direction: row;
        gap: 22px;
        align-items: flex-end;
        min-height: 78px;
      }

      .footer-brand {
        font-size: 38px;
      }

      .footer-panel {
        min-height: 0;
        padding: 18px;
      }

      .footer-item-links a {
        min-height: 48px;
      }
    }

    /* The reference switches to its full-screen navigation before phone size.
       Preserve that decision here so tablets do not squeeze desktop links into
       a narrow header. */
    @media (min-width: 681px) and (max-width: 991px) {
      .sticky-top {
        position: sticky;
        top: 0;
        z-index: 50;
        background: rgba(227, 255, 232, 0.72);
        -webkit-backdrop-filter: saturate(150%) blur(12px);
        backdrop-filter: saturate(150%) blur(12px);
        border-bottom-color: transparent;
      }

      .site-header {
        min-height: 76px;
        padding: 14px 20px;
      }

      .menu-toggle {
        display: inline-flex;
        color: var(--text);
        border-color: var(--border);
        border-radius: 6px !important;
      }

      .menu-bar,
      .menu-bar.is-open {
        display: none;
      }

      .mobile-nav-backdrop {
        position: fixed;
        z-index: 90;
        inset: 0;
        display: block;
        opacity: 0;
        pointer-events: none;
        background: rgba(225, 255, 233, 0.08);
        -webkit-backdrop-filter: blur(0) saturate(100%);
        backdrop-filter: blur(0) saturate(100%);
        transition: opacity 500ms ease, backdrop-filter 500ms ease;
      }

      .mobile-nav-backdrop.is-open {
        opacity: 1;
        pointer-events: auto;
        -webkit-backdrop-filter: blur(36px) saturate(115%);
        backdrop-filter: blur(36px) saturate(115%);
      }

      .mobile-nav-overlay {
        position: fixed;
        z-index: 100;
        inset: 0;
        display: flex;
        flex-direction: column;
        padding: 16px clamp(28px, 5vw, 52px) 44px;
        opacity: 0;
        pointer-events: none;
        background: rgba(235, 255, 238, 0.02);
        transform: translateY(8px);
        transition: opacity 500ms ease, transform 500ms ease;
      }

      .mobile-nav-overlay.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
      }

      .mobile-nav-overlay[hidden],
      .mobile-nav-backdrop[hidden] {
        display: none;
      }

      .mobile-nav-overlay-head {
        display: flex;
        justify-content: flex-end;
        min-height: 44px;
      }

      .mobile-nav-close {
        display: grid;
        width: 44px;
        height: 44px;
        place-items: center;
        color: var(--text);
        background: rgba(255, 255, 255, 0.24);
        border: 1px solid var(--border);
        border-radius: 6px;
      }

      .mobile-nav-close svg {
        width: 19px;
        height: 19px;
        fill: none;
        stroke: currentColor;
        stroke-linecap: round;
        stroke-width: 1.8;
      }

      .mobile-nav-list {
        display: grid;
        gap: 0;
        width: min(100%, 540px);
        margin-top: 28px;
      }

      .mobile-nav-list a {
        display: flex;
        align-items: center;
        min-height: 68px;
        padding: 14px 18px;
        margin-bottom: -1px;
        color: var(--text);
        background: rgba(255, 255, 255, 0.2);
        border: 1px solid var(--border);
        font-family: var(--font-mono);
        font-size: 12px;
        font-weight: 500;
        letter-spacing: 0.06em;
        text-decoration: none;
        text-transform: uppercase;
        opacity: 0;
        transform: translateX(-20px);
        transition: opacity 350ms ease, transform 350ms ease, background-color 180ms ease;
      }

      .mobile-nav-list a.is-visible {
        opacity: 1;
        transform: translateX(0);
      }

      .mobile-nav-list a:hover,
      .mobile-nav-list a:focus-visible {
        background: rgba(255, 255, 255, 0.5);
        outline: none;
      }

      body.mobile-nav-open {
        overflow: hidden;
      }

      .page-shell,
      .site-footer {
        transition: transform 500ms ease;
      }

      body.mobile-nav-open .page-shell,
      body.mobile-nav-open .site-footer {
        transform: translateY(-72px);
      }
    }

    /* ------------------------------------------------------------------
       Editorial access, provider identity, and support service request
       ------------------------------------------------------------------ */
    .download-button.is-unavailable {
      opacity: 0.62;
    }

    .recommended-download,
    .recommended-download[aria-disabled="true"] {
      color: #f2fff4 !important;
      background: linear-gradient(145deg, #155d4e, #083d32);
      border-color: #063328;
      box-shadow: inset 0 1px 0 rgba(217, 255, 225, 0.28);
    }

    .recommended-download:hover:not(:disabled):not([aria-disabled="true"]) {
      color: #f2fff4 !important;
      background: linear-gradient(145deg, #207563, #0b4d40);
      border-color: #063328;
    }

    .provider-card-head {
      display: flex;
      align-items: center;
      gap: 11px;
    }

    /* Official provider marks (from the svgl brand library) sit on a neutral
       tile so each brand's own colour reads cleanly. */
    .provider-logo {
      display: grid;
      width: 34px;
      height: 34px;
      flex: 0 0 34px;
      place-items: center;
      border: 1px solid var(--border-soft);
      border-radius: 9px !important;
      background: #ffffff;
      overflow: hidden;
    }

    .provider-logo svg {
      width: auto;
      height: 20px;
      max-width: 22px;
      display: block;
    }

    /* Meta's wordmark-less mark is wider than tall; give it a touch more room. */
    .provider-logo--llama svg {
      height: 15px;
      max-width: 24px;
    }

    .provider-status {
      margin-left: auto;
      padding: 4px 8px;
      color: #0b57d0;
      background: rgba(8, 102, 255, 0.07);
      border: 1px solid rgba(8, 102, 255, 0.4);
      /* A box, like the nav / brand / badge boxes — not a pill. */
      border-radius: 5px !important;
      font-family: var(--font-mono);
      font-size: 9px;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      white-space: nowrap;
    }

    .provider-note {
      margin: 0 0 13px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.36;
    }

    /* The upcoming (local) provider reads as pending, not yet live. */
    .provider-card--upcoming {
      border-style: dashed;
    }

    /* The access scene reads as a sequence, not a left rail beside a large
       card: the licence takes the canvas, with explanation and support as a
       restrained follow-up below it. */
    .ambient-scene--access .scene-grid > #license {
      order: -1;
      grid-column: 1 / -1;
      grid-row: auto;
    }

    .ambient-scene--access .access-rail {
      display: grid;
      grid-column: 1 / -1;
      grid-row: auto;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: clamp(30px, 5vw, 76px);
      width: min(100%, 1120px);
      justify-self: start;
      align-items: center;
      padding: clamp(26px, 4vw, 56px) 0 0;
      border-top: 1px solid rgba(37, 37, 32, 0.58);
    }

    #support.section,
    .activation-explainer {
      padding: 0;
      color: var(--text);
      background: transparent;
      border: 0;
      border-radius: 0 !important;
      overflow: visible;
    }

    #support.section::before {
      display: none;
    }

    #support .section-kicker,
    .activation-explainer .section-kicker,
    #support .section-copy,
    .activation-explainer .section-copy {
      color: var(--text);
    }

    #support .section-heading,
    .activation-explainer .section-heading {
      margin-bottom: 16px;
    }

    #support .section-copy,
    .activation-explainer .section-copy {
      max-width: 57ch;
      margin-bottom: 0;
    }

    #support .support-actions {
      align-items: flex-start;
      margin-top: 20px;
    }

    #support .button {
      color: #effff1;
      background: #0b4a3d;
      border-color: #063b30;
    }

    #support .button:hover {
      color: var(--text);
      background: #b7edd2;
    }

    .activation-explainer h2 {
      max-width: 11ch;
      margin-bottom: 8px;
      font-size: clamp(26px, 3vw, 40px);
      font-weight: 300;
      letter-spacing: -0.055em;
    }

    #license {
      padding: clamp(34px, 5vw, 74px);
      background: rgba(255, 255, 255, 0.1);
    }

    #license .section-heading h2 {
      max-width: none;
    }

    #license .activation-grid {
      display: grid;
      grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.18fr);
      gap: clamp(18px, 3.5vw, 58px);
      align-items: stretch;
      margin-top: clamp(28px, 4vw, 52px);
    }

    #license .step-panel {
      display: flex;
      flex-direction: column;
      background: rgba(255, 255, 255, 0.16);
    }

    #license .step-body {
      flex: 1;
      padding: clamp(22px, 3vw, 38px);
    }

    #license .wallet-box {
      padding: 18px;
      background: rgba(255, 255, 255, 0.2);
    }

    #license .notice-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 0;
      margin-top: clamp(30px, 4vw, 58px);
      border-top: 1px solid var(--border);
    }

    #license .notice-box {
      padding: 24px clamp(18px, 2.4vw, 34px) 8px;
      background: transparent;
      border: 0;
      border-left: 1px solid var(--border-soft);
      border-radius: 0 !important;
    }

    #license .notice-box h3 {
      margin-bottom: clamp(8px, 1vw, 12px);
      font-size: var(--font-license-notice-heading);
      line-height: var(--line-license-notice-heading);
      letter-spacing: -0.035em;
    }

    #license .notice-box p {
      font-size: var(--font-license-notice-body);
      line-height: var(--line-license-notice-body);
    }

    #license .notice-box:first-child {
      border-left: 0;
    }

    #license .notice-wide {
      grid-column: auto;
    }

    .wallet-qr-brand {
      display: grid;
      place-items: center;
      font-family: var(--font-ui);
      font-size: 26px;
      font-weight: 300;
      letter-spacing: -0.09em;
    }

    .wallet-qr {
      position: relative;
      width: min(100%, 192px);
      margin: 20px auto 0;
      padding: 14px;
      place-items: center;
      background: #f5fff6;
      border-color: var(--border);
      border-radius: 10px !important;
    }

    .wallet-qr.is-visible {
      display: grid;
    }

    .wallet-qr-brand {
      position: absolute;
      z-index: 1;
      width: 32px;
      height: 32px;
      color: #e82127;
      background: #f5fff6;
      border: 1px solid #efb5b8;
      border-radius: 50%;
      pointer-events: none;
    }

    .wallet-qr-brand svg {
      width: 21px;
      height: 21px;
      fill: currentColor;
    }

    /* Support is a service-request workspace, not a narrow legacy dialog. */
    body.support-modal-open {
      overflow: hidden;
    }

    .modal-overlay {
      z-index: 200;
      align-items: center;
      padding: clamp(18px, 4vh, 48px) 20px;
      background: rgba(12, 42, 35, 0.38);
      -webkit-backdrop-filter: blur(24px) saturate(115%);
      backdrop-filter: blur(24px) saturate(115%);
    }

    .modal {
      width: min(940px, 100%);
      max-height: min(760px, calc(100dvh - 36px));
      color: var(--text);
      background: rgba(239, 255, 241, 0.93);
      border-radius: 18px !important;
      overflow: hidden;
    }

    .modal .window-titlebar {
      min-height: 68px;
      padding-left: clamp(22px, 3vw, 34px);
    }

    .modal .window-titlebar > span {
      font-family: var(--font-ui);
      font-size: clamp(23px, 3vw, 34px);
      font-weight: 300;
      letter-spacing: -0.06em;
    }

    .modal-close {
      width: 46px;
      height: 46px;
      margin-right: 11px;
      border-radius: 50% !important;
    }

    .modal-body {
      overflow-y: auto;
      padding: clamp(24px, 4vw, 46px);
    }

    .modal-intro-wrap {
      max-width: 63ch;
      margin-bottom: 30px;
    }

    .modal-intro-wrap .section-kicker {
      margin-bottom: 8px;
    }

    .modal-intro {
      margin: 0;
      font-size: 18px;
      line-height: 1.38;
      letter-spacing: -0.025em;
    }

    .support-form {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(210px, 0.42fr);
      gap: 24px clamp(24px, 4vw, 48px);
    }

    .support-fields {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
    }

    .support-fields .form-field {
      margin: 0;
    }

    .support-fields label span {
      color: var(--muted);
      font-weight: 400;
      text-transform: none;
    }

    .support-concern-field {
      grid-column: 1 / -1;
    }

    .support-fields input,
    .support-fields textarea {
      background: rgba(255, 255, 255, 0.55);
      border-color: var(--border);
      border-radius: 5px;
      box-shadow: none;
    }

    .support-fields textarea {
      min-height: 142px;
    }

    .support-guidance {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      padding: 22px;
      color: #eaffed;
      background: #104b3f;
      border-radius: 12px;
    }

    .support-guidance h3 {
      margin: 26px 0 8px;
      font-size: 20px;
      font-weight: 400;
      letter-spacing: -0.04em;
    }

    .support-guidance p,
    .support-guidance li {
      color: #cdebd9;
      font-size: 13px;
      line-height: 1.42;
    }

    .support-guidance p {
      margin-bottom: 12px;
    }

    .support-guidance ul {
      margin: 0;
      padding-left: 17px;
    }

    .support-guidance li + li {
      margin-top: 6px;
    }

    .support-form-footer,
    .sr-result {
      grid-column: 1 / -1;
    }

    .support-form-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding-top: 22px;
      border-top: 1px solid var(--border);
    }

    .modal-disclaimer {
      max-width: 58ch;
      margin: 0;
      padding: 0;
      background: transparent;
      border: 0;
    }

    .modal-disclaimer h3 {
      margin-bottom: 5px;
      color: var(--text);
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 500;
      letter-spacing: 0.07em;
      text-transform: uppercase;
    }

    .modal-disclaimer p {
      margin: 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.42;
    }

    .modal-submit {
      width: auto;
      min-width: 188px;
      padding: 11px 17px;
    }

    .sr-result {
      margin-top: 0;
      border-radius: 8px;
    }

    @media (max-width: 900px) {
      .ambient-scene--access .access-rail {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      #license .activation-grid {
        grid-template-columns: 1fr;
      }

      #license .notice-grid {
        grid-template-columns: 1fr;
      }

      #license .notice-box,
      #license .notice-box:first-child {
        padding: 20px 0;
        border-top: 1px solid var(--border-soft);
        border-left: 0;
      }

      #license .notice-box:first-child {
        border-top: 0;
      }

      .support-form {
        grid-template-columns: 1fr;
      }

      .support-guidance {
        min-height: 0;
      }

      .support-guidance h3 {
        margin-top: 18px;
      }
    }

    @media (max-width: 600px) {
      #license {
        padding: 28px 20px;
      }

      .support-fields {
        grid-template-columns: 1fr;
      }

      .support-concern-field {
        grid-column: auto;
      }

      .support-form-footer {
        align-items: stretch;
        flex-direction: column;
      }

      .modal-submit {
        width: 100%;
      }

      .modal-overlay {
        padding: 12px;
      }

      .modal-body {
        padding: 24px 20px;
      }
    }

    /* ------------------------------------------------------------------
       Atmospheric depth and support workspace refinement
       ------------------------------------------------------------------ */
    .ambient-scene {
      isolation: isolate;
      background-color: #e9f8ed;
      box-shadow: inset 0 1px rgba(255, 255, 255, 0.54), inset 0 -80px 110px rgba(58, 112, 89, 0.08);
    }

    .ambient-scene::before,
    .ambient-scene::after {
      position: absolute;
      z-index: 0;
      inset: -8%;
      content: "";
      pointer-events: none;
    }

    .ambient-scene::before {
      filter: blur(32px);
      opacity: 0.76;
      transform: scale(1.06);
    }

    .ambient-scene::after {
      opacity: 0.42;
      background-image:
        radial-gradient(circle at 20% 15%, rgba(255, 255, 255, 0.64) 0 1px, transparent 1.4px),
        radial-gradient(circle at 78% 64%, rgba(16, 72, 61, 0.13) 0 1px, transparent 1.5px);
      background-size: 34px 34px, 49px 49px;
      mask-image: linear-gradient(to bottom, transparent, black 14%, black 86%, transparent);
    }

    .ambient-scene--hero {
      background:
        radial-gradient(62% 92% at 105% 1%, rgba(49, 154, 208, 0.34), transparent 57%),
        radial-gradient(54% 88% at -9% 92%, rgba(64, 184, 114, 0.34), transparent 58%),
        radial-gradient(58% 72% at 48% 52%, rgba(255, 255, 255, 0.48), transparent 70%),
        linear-gradient(148deg, #eaffeb 0%, #e1f7ec 46%, #d9effb 100%);
    }

    .ambient-scene--hero::before {
      background:
        radial-gradient(34% 54% at 79% 39%, rgba(47, 179, 232, 0.48), transparent 70%),
        radial-gradient(39% 50% at 17% 78%, rgba(111, 225, 152, 0.46), transparent 72%);
    }

    .ambient-scene--platform {
      background:
        radial-gradient(65% 90% at -10% 8%, rgba(68, 178, 234, 0.34), transparent 57%),
        radial-gradient(58% 92% at 109% 84%, rgba(94, 204, 123, 0.35), transparent 62%),
        radial-gradient(52% 70% at 52% 46%, rgba(255, 255, 255, 0.4), transparent 70%),
        linear-gradient(162deg, #dceffd 0%, #e7f9ef 53%, #e2f8e7 100%);
    }

    .ambient-scene--platform::before {
      background:
        radial-gradient(38% 56% at 16% 34%, rgba(91, 198, 245, 0.45), transparent 69%),
        radial-gradient(40% 62% at 86% 70%, rgba(109, 223, 133, 0.4), transparent 72%);
    }

    .ambient-scene--access {
      background:
        radial-gradient(62% 88% at 105% 5%, rgba(250, 164, 126, 0.31), transparent 58%),
        radial-gradient(58% 82% at -6% 90%, rgba(65, 183, 229, 0.32), transparent 60%),
        radial-gradient(48% 70% at 52% 50%, rgba(255, 255, 255, 0.42), transparent 70%),
        linear-gradient(161deg, #e7faea 0%, #e0f1fb 48%, #e5f8e9 100%);
    }

    .ambient-scene--access::before {
      background:
        radial-gradient(35% 56% at 81% 18%, rgba(255, 183, 146, 0.42), transparent 70%),
        radial-gradient(42% 60% at 15% 78%, rgba(67, 187, 231, 0.42), transparent 72%);
    }

    .scene-grid {
      z-index: 1;
    }

    .modal-overlay {
      background:
        radial-gradient(62% 78% at 11% 4%, rgba(116, 226, 152, 0.28), transparent 64%),
        radial-gradient(58% 82% at 92% 92%, rgba(75, 174, 218, 0.3), transparent 65%),
        rgba(6, 37, 30, 0.64);
      -webkit-backdrop-filter: blur(34px) saturate(125%);
      backdrop-filter: blur(34px) saturate(125%);
    }

    .modal {
      background:
        linear-gradient(128deg, rgba(247, 255, 248, 0.96), rgba(224, 247, 234, 0.91));
      border-color: rgba(31, 74, 61, 0.76);
      box-shadow: 0 32px 100px rgba(0, 27, 21, 0.4), inset 0 1px rgba(255, 255, 255, 0.9);
    }

    .modal .window-titlebar {
      min-height: 78px;
      padding-left: clamp(26px, 4vw, 42px);
      background: linear-gradient(90deg, rgba(255, 255, 255, 0.34), transparent);
    }

    .modal-body {
      padding: clamp(28px, 4.6vw, 52px);
    }

    .modal-intro-wrap {
      margin-bottom: 34px;
      padding-bottom: 24px;
      border-bottom: 1px solid rgba(31, 74, 61, 0.35);
    }

    .support-form {
      gap: 30px clamp(28px, 4.5vw, 54px);
    }

    .support-fields {
      gap: 19px;
    }

    .support-fields input,
    .support-fields textarea {
      padding: 11px 12px;
      border-color: rgba(31, 74, 61, 0.58);
      border-radius: 6px !important;
    }

    .support-guidance {
      padding: 28px;
      background:
        radial-gradient(110% 72% at 100% 0%, rgba(113, 227, 151, 0.26), transparent 58%),
        linear-gradient(154deg, #0d5849, #083e34);
      border: 1px solid rgba(216, 255, 226, 0.52);
      border-radius: 14px !important;
      box-shadow: inset 0 1px rgba(255, 255, 255, 0.18), 0 18px 42px rgba(12, 61, 50, 0.18);
    }

    .support-guidance h3 {
      margin: 0 0 10px;
      font-size: 22px;
    }

    .support-guidance p {
      margin-bottom: 16px;
    }

    .support-guidance ul {
      padding-top: 14px;
      padding-left: 18px;
      border-top: 1px solid rgba(220, 255, 229, 0.25);
    }

    .support-form-footer {
      padding-top: 26px;
      border-top-color: rgba(31, 74, 61, 0.4);
    }

    @media (min-width: 992px) {
      #primaryMenu a {
        min-width: 0;
        padding-right: 13px;
        padding-left: 13px;
      }
    }

    @media (max-width: 680px) {
      .ambient-scene::before {
        filter: blur(22px);
        opacity: 0.64;
      }

      .modal .window-titlebar {
        min-height: 68px;
        padding-left: 22px;
      }

      .modal-intro-wrap {
        margin-bottom: 26px;
        padding-bottom: 19px;
      }

      .support-guidance {
        padding: 22px;
      }

    }

    /* Borderless editorial layout: scene-grid still controls the composition,
       but the primary page regions no longer render as cards. */
    .ambient-scene--hero .hero-cell,
    .ambient-scene .scene-grid > section.section {
      background: transparent;
      border: 0;
      border-radius: 0 !important;
      box-shadow: none;
      -webkit-backdrop-filter: none;
      backdrop-filter: none;
    }

    .ambient-scene .scene-grid > section.section {
      overflow: visible;
    }

    .ambient-scene--access #license.section,
    .ambient-scene--access #support.section {
      background: transparent;
      -webkit-backdrop-filter: none;
      backdrop-filter: none;
    }

    .page-shell .provider-card,
    .page-shell .notice-box,
    .page-shell .step-panel,
    .page-shell .plan-strip,
    .page-shell .wallet-box,
    .page-shell .release-note {
      background: transparent;
      border: 0;
      border-radius: 0 !important;
      box-shadow: none;
    }

    .page-shell #license .step-panel,
    .page-shell #license .wallet-box {
      background: transparent;
    }

    .ambient-scene .scene-grid > section.section::before {
      display: none;
    }

    /* Customer Support and activation guidance now occupy the same full-width
       editorial canvas and horizontal rhythm as the License section. */
    .ambient-scene--access .access-rail {
      width: 100%;
      justify-self: stretch;
      align-items: start;
      padding: clamp(34px, 5vw, 74px);
      background: transparent;
      border: 0;
    }

    @media (max-width: 600px) {
      .ambient-scene--access .access-rail {
        padding: 28px 20px;
      }
    }

    /* Keep the product name as one lockup, with the studio name as the
       neighbouring wordmark — the same compact relationship as the reference
       navigation logo. */
    .brand {
      gap: 0;
    }

    .brand-lockup {
      display: flex;
      min-width: 0;
      align-items: stretch;
    }

    .brand .brand-mark {
      flex: 0 0 auto;
      border-radius: 6px 0 0 6px !important;
    }

    .brand .brand-name {
      min-width: 0;
      border-right: 0;
      border-radius: 0 !important;
    }

    .brand > div.brand-labs {
      display: flex;
      align-items: center;
      min-height: 42px;
      padding: 6px 10px;
      color: var(--text);
      border: 1px solid var(--border);
      border-radius: 0 6px 6px 0 !important;
      font-family: var(--font-mono);
      font-size: 10px;
      letter-spacing: 0.04em;
      line-height: 1;
      text-transform: uppercase;
      white-space: nowrap;
    }

    .brand-labs-label {
      display: block;
      line-height: 1;
      transform: translateY(1px);
    }

    .modal-close {
      transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
    }

    .modal-close:hover,
    .modal-close:focus-visible {
      color: #effff1;
      background: linear-gradient(145deg, #176553, #0a4438);
      border-color: #063b30;
      box-shadow: inset 0 1px rgba(255, 255, 255, 0.22), 0 6px 14px rgba(5, 50, 40, 0.22);
      outline: none;
    }

    .modal-close:hover .close-ico,
    .modal-close:focus-visible .close-ico {
      transform: rotate(90deg) scale(1.06);
    }

    @media (max-width: 680px) {
      .brand-lockup,
      .brand-labs {
        min-height: 36px;
        height: 36px;
      }

      .brand .brand-name {
        padding-right: 7px;
        padding-left: 7px;
        font-size: 18px;
      }

      .brand-labs {
        padding-right: 7px;
        padding-left: 7px;
        font-size: 8px;
      }

      .brand-labs-label {
        transform: translateY(1px);
      }
    }

    @media (prefers-reduced-motion: reduce) {
      .mobile-nav-backdrop,
      .mobile-nav-overlay,
      .mobile-nav-list a,
      .page-shell,
      .site-footer,
      .footer-item-links a {
        transition: none;
      }
    }