:root {
      --bg-top: #27323d;
      --bg-mid: #1f2832;
      --bg-bottom: #1a2027;
      --surface: #2b3642;
      --surface-strong: #344352;
      --surface-soft: #303d4a;
      --text-main: #f5f7fa;
      --text-soft: #d2dae2;
      --border-main: #425363;
    }

    html,
    body {
      background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 45%, var(--bg-bottom) 100%);
    }

    body {
      color: var(--text-main);
    }

    .main-wrap {
      max-width: 1100px;
      margin: 0 auto;
      padding: 2rem 1rem 4rem 1rem;
    }

    .soft-box {
      background: var(--surface-soft);
      border: 1px solid var(--border-main);
      border-radius: 18px;
      padding: 1.5rem;
    }

    .feature-box {
      transition: transform 0.22s ease, background 0.22s ease, box-shadow 0.22s ease;
    }

    .feature-box:hover {
      transform: scale(1.01);
      background: #354453;
      box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
    }

    .section-spacing {
      margin-bottom: 2.5rem;
    }

    .hero-box {
      background: linear-gradient(135deg, var(--surface-strong) 0%, var(--surface) 100%);
      border: 1px solid var(--border-main);
      border-radius: 22px;
      padding: 2rem;
      transition: transform 0.22s ease, background 0.22s ease, box-shadow 0.22s ease;
    }

    .hero-box:hover {
      transform: scale(1.01);
      background: linear-gradient(135deg, #3a4a5a 0%, #334252 100%);
      box-shadow: 0 14px 34px rgba(0, 0, 0, 0.24);
    }

    .image.is-16by9 img,
    .image.is-4by3 img {
      object-fit: contain;
      width: 100%;
      height: 100%;
      border-radius: 14px;
      background: #24303a;
    }

    .ebook-cover {
      aspect-ratio: 3 / 4;
      max-height: 360px;
    }

    .ebook-cover-hero {
      height: 100%;
      min-height: 100%;
      width: 100%;
      padding: 0;
      background: transparent;
      border: 0;
      box-shadow: none;
      aspect-ratio: auto;
      max-height: none;
    }

    .ebook-cover img {
      display: block;
      object-fit: contain;
      padding: 0;
    }

    .ebook-cover-hero img {
      background: transparent !important;
      border-radius: 0;
      box-shadow: none;
    }

    .featured-chooser {
      color: #f5f5f5;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .chooser-stack {
      display: grid;
      grid-template-columns: 1fr;
      gap: 1rem;
    }

    .chooser-info {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 16px;
      padding: 1rem 1.1rem;
    }

    .chooser-meta {
      font-size: 1rem;
      color: var(--text-soft);
      margin-bottom: 0.25rem;
    }

    .chooser-meta .icon,
    .chooser-price .icon {
      margin-right: 0.4rem;
      vertical-align: middle;
    }

    .chooser-price {
      font-size: 1.35rem;
      font-weight: 800;
      color: #ffdd57;
      margin-bottom: 0.5rem;
    }

    .mini-note {
      color: var(--text-soft);
    }

    .promo-frame {
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-main);
      background: #1e2730;
    }

    .academy-teaser-image {
      aspect-ratio: 16 / 6;
    }

    .academy-teaser-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .brand-link {
      text-decoration: none;
    }

    .brand-link:hover {
      opacity: 0.95;
    }

    .button.is-warning.is-soft {
      background: #ffdd57;
      color: #222;
      border: none;
      transition: transform 0.2s ease, background 0.2s ease;
    }

    .button.is-warning.is-soft:hover {
      background: #ffe57d;
      color: #111;
      transform: scale(1.04);
    }

    .button.is-link {
      transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
    }

    .button.is-link:hover {
      transform: scale(1.04);
    }

    .academy-cta {
      margin-top: 1rem;
    }

    .academy-promo {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 16px;
      padding: 1rem 1.1rem;
      text-align: center;
    }

    .academy-promo .button {
      min-width: 220px;
    }

    .newsletter-box {
      padding: 1.5rem;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 24px;
      background: rgba(12, 17, 27, 0.78);
      box-shadow: 0 28px 70px rgba(0, 0, 0, 0.38);
      backdrop-filter: blur(18px) saturate(140%);
    }

    .newsletter-box__intro {
      max-width: 60ch;
      margin-bottom: .9rem;
      color: var(--text-soft);
      font-size: .95rem;
      line-height: 1.5;
    }

    .newsletter-highlight {
      color: #ffbf3f;
      font-weight: 800;
    }

    .promo-row {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 1.25rem;
      align-items: stretch;
    }

    .promo-row__item {
      margin-bottom: 0;
    }

    .newsletter-box__fields {
      display: flex;
      gap: .75rem;
      max-width: 720px;
    }

    .newsletter-box__fields .input {
      min-height: 3rem;
      background: rgba(255, 255, 255, .96);
      color: #071117;
    }

    .newsletter-box__fields .button {
      flex: 0 0 auto;
      min-height: 3rem;
    }

    .newsletter-box__consent {
      display: flex;
      gap: .5rem;
      align-items: flex-start;
      max-width: 720px;
      margin-top: .7rem;
      color: #9aa7bf;
      font-size: .8rem;
      line-height: 1.45;
    }

    .newsletter-box__consent input {
      margin-top: .2rem;
    }

    .newsletter-box__consent a {
      color: #7cf7d4;
    }

    .newsletter-box__message,
    .newsletter-box__error {
      max-width: 680px;
      margin-bottom: 1rem;
      padding: .75rem 1rem;
      border-radius: 10px;
    }

    .newsletter-box__message {
      color: #7cf7d4;
      background: rgba(124, 247, 212, .1);
    }

    .newsletter-box__error {
      color: #ffd0d0;
      background: rgba(255, 107, 107, .12);
    }

    .newsletter-box__honeypot {
      position: absolute;
      left: -9999px;
      width: 1px;
      height: 1px;
    }

    .course-switcher {
      margin-bottom: 1.5rem;
    }

    .course-tabs {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 0.5rem;
    }

    .course-tab {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      color: var(--text-main);
      transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
      padding-left: 0.8rem;
      padding-right: 0.8rem;
      font-size: 0.95rem;
    }

    .course-tab:hover {
      transform: scale(1.03);
      color: var(--text-main);
      border-color: rgba(255, 221, 87, 0.45);
    }

    .course-tab.is-active {
      background: #ffdd57;
      border-color: #ffdd57;
      color: #111;
      font-weight: 700;
    }

    .direct-link-btn {
      font-size: 1.2rem;
      font-weight: 700;
      padding: 1.1rem 2rem;
      min-height: 3.3rem;
      border-radius: 14px;
    }

    .direct-link-btn span:last-child {
      word-break: break-all;
      white-space: normal;
    }

    .ebook-meta {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.75rem;
      flex-wrap: wrap;
      color: var(--text-soft);
    }

    .ebook-price {
      font-size: 1.7rem;
      font-weight: 700;
      color: #ffdd57;
    }

    .ebook-cover-link {
      display: block;
      height: 100%;
      color: inherit;
    }

    .ebook-cover-link:hover {
      color: inherit;
    }

    /* Reference-style overrides */
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: transparent;
      color: #f5f7fb;
    }

    html {
      background:
        radial-gradient(circle at 20% 20%, rgba(122, 168, 255, 0.12), transparent 28%),
        radial-gradient(circle at 80% 10%, rgba(255, 180, 84, 0.08), transparent 22%),
        #070b12;
    }

    body::before {
      background:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 88px 88px;
      mask-image: radial-gradient(circle at center, black 36%, transparent 90%);
      opacity: 0.24;
    }

    .backdrop,
    .grid-noise {
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 0;
    }

    .backdrop::before,
    .backdrop::after {
      content: "";
      position: absolute;
      border-radius: 999px;
      filter: blur(20px);
      opacity: 0.82;
    }

    .backdrop-a::before {
      width: 420px;
      height: 420px;
      left: -110px;
      top: 70px;
      background: radial-gradient(circle, rgba(124, 247, 212, 0.22), transparent 70%);
    }

    .backdrop-a::after {
      width: 300px;
      height: 300px;
      right: 12%;
      top: 7%;
      background: radial-gradient(circle, rgba(122, 168, 255, 0.16), transparent 72%);
    }

    .backdrop-b::before {
      width: 360px;
      height: 360px;
      right: -90px;
      bottom: 3%;
      background: radial-gradient(circle, rgba(255, 180, 84, 0.18), transparent 72%);
    }

    .grid-noise {
      background-image:
        linear-gradient(transparent 0 97%, rgba(255, 255, 255, 0.03) 100%),
        linear-gradient(90deg, transparent 0 97%, rgba(255, 255, 255, 0.03) 100%);
      background-size: 22px 22px;
      opacity: 0.07;
      mix-blend-mode: screen;
    }

    .main-wrap {
      width: min(1180px, calc(100% - 32px));
      padding: 42px 0 76px;
    }

    .section-spacing {
      margin-bottom: 2.5rem;
    }

    .hero-box,
    .soft-box,
    .academy-promo {
      background: rgba(12, 17, 27, 0.78);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 24px;
      box-shadow: 0 28px 70px rgba(0, 0, 0, 0.38);
      backdrop-filter: blur(18px) saturate(140%);
    }

    .hero-box {
      background: linear-gradient(135deg, rgba(12, 17, 27, 0.88) 0%, rgba(12, 17, 27, 0.74) 100%);
      padding: 2rem;
    }

    .soft-box,
    .academy-promo {
      padding: 1.5rem;
    }

    .feature-box:hover,
    .hero-box:hover {
      transform: translateY(-2px);
      border-color: rgba(255, 255, 255, 0.18);
      box-shadow: 0 34px 80px rgba(0, 0, 0, 0.42);
    }

    .brand-link {
      gap: 0.9rem;
      padding: 0.9rem 1rem;
      border-radius: 18px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      background: rgba(255, 255, 255, 0.03);
      box-shadow: 0 14px 28px rgba(0, 0, 0, 0.18);
      backdrop-filter: blur(10px);
    }

    .brand-link:hover {
      opacity: 1;
      background: rgba(255, 255, 255, 0.05);
      border-color: rgba(124, 247, 212, 0.22);
      transform: translateY(-1px);
    }

    .eyebrow,
    .section-heading {
      margin: 0 0 12px;
      color: #7cf7d4;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.2em;
      text-transform: uppercase;
    }

    .hero-intro {
      margin: 18px 0 0;
      max-width: 70ch;
      color: #c3cde0;
      font-size: 1.08rem;
      line-height: 1.7;
    }

    .hero-box .title.is-3,
    .soft-box .title.is-3 {
      font-size: clamp(1.8rem, 4vw, 3rem);
    }

    .promo-frame {
      border-radius: 18px;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.12);
      background: #1e2730;
      box-shadow: 0 18px 38px rgba(0, 0, 0, 0.24);
    }

    .chooser-info {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 16px;
    }

    .chooser-price,
    .ebook-price {
      color: #7cf7d4;
    }

    .button.is-warning.is-soft {
      background: linear-gradient(135deg, #7cf7d4 0%, #d6fff5 100%);
      border: 1px solid rgba(124, 247, 212, 0.45);
      color: #071117;
      box-shadow: 0 16px 32px rgba(124, 247, 212, 0.18);
    }

    .button.is-warning.is-soft:hover {
      background: linear-gradient(135deg, #8cf8da 0%, #e3fff8 100%);
      color: #071117;
      box-shadow: 0 20px 40px rgba(124, 247, 212, 0.24);
    }

    .button.is-link {
      background: linear-gradient(135deg, #7aa8ff 0%, #d7e6ff 100%);
      border: 1px solid rgba(122, 168, 255, 0.45);
      color: #071117;
      box-shadow: 0 16px 32px rgba(122, 168, 255, 0.18);
    }

    .button.is-link:hover {
      background: linear-gradient(135deg, #8ab3ff 0%, #e4eeff 100%);
      color: #071117;
      box-shadow: 0 20px 40px rgba(122, 168, 255, 0.24);
    }

    .button.is-light.is-outlined {
      border-color: rgba(255, 255, 255, 0.22);
      color: #f5f7fb;
      background: rgba(255, 255, 255, 0.02);
    }

    .button.is-light.is-outlined:hover {
      color: white;
      border-color: rgba(124, 247, 212, 0.35);
    }

    .course-tabs {
      justify-content: center;
      gap: 0.5rem;
    }

    .course-tab {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      color: #f5f7fb;
    }

    .course-tab:hover {
      border-color: rgba(124, 247, 212, 0.45);
      color: #f5f7fb;
    }

    .course-tab.is-active {
      background: #7cf7d4;
      border-color: #7cf7d4;
      color: #071117;
    }

    .stats {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      margin-top: 28px;
    }

    .stat {
      padding: 16px 18px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.04);
      backdrop-filter: blur(10px);
    }

    .stat span {
      display: block;
      font-size: 1.6rem;
      font-weight: 700;
      color: white;
    }

    .stat label {
      display: block;
      margin-top: 4px;
      color: #9aa7bf;
      font-size: 0.9rem;
    }

    footer .content,
    footer .content a {
      color: #9aa7bf;
    }

    @media screen and (max-width: 768px) {
      .main-wrap {
        width: min(1180px, calc(100% - 24px));
        padding: 28px 0 56px;
      }

      .hero-box,
      .soft-box,
      .academy-promo {
        padding: 1.15rem;
      }

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

      .brand-link {
        width: 100%;
      }

      .newsletter-box__fields {
        flex-direction: column;
      }

      .newsletter-box__fields .button {
        width: 100%;
      }

      .promo-row {
        grid-template-columns: 1fr;
      }
    }