:root {
      --ink: #08223d;
      --ink-2: #12324f;
      --muted: #667782;
      --paper: #fffdf8;
      --cream: #fff6e9;
      --line: rgba(8, 34, 61, 0.14);
      --coral: #ff6048;
      --coral-dark: #e84b37;
      --teal: #249da2;
      --white: #ffffff;
      color-scheme: light;
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      line-height: 1.5;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      display: block;
      max-width: 100%;
    }

    .page {
      min-height: 100vh;
      overflow: hidden;
    }

    .shell {
      width: min(1160px, calc(100% - 40px));
      margin: 0 auto;
    }

    .topbar {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255, 253, 248, 0.9);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(16px);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 850;
      letter-spacing: 0;
    }

    .brand img {
      width: 42px;
      height: 42px;
      border-radius: 10px;
      box-shadow: 0 10px 24px rgba(8, 34, 61, 0.16);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 18px;
      color: var(--muted);
      font-size: 0.95rem;
      font-weight: 700;
    }

    .nav-links a:hover {
      color: var(--ink);
    }

    .hero {
      position: relative;
      background:
        radial-gradient(circle at 12% 10%, rgba(255, 96, 72, 0.12), transparent 28%),
        linear-gradient(180deg, #fffaf1 0%, var(--paper) 100%);
    }

    .hero-download {
      display: grid;
      grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
      align-items: center;
      gap: 42px;
      padding: 72px 0 76px;
    }

    .wordmark {
      width: min(430px, 100%);
      height: 138px;
      margin-bottom: 18px;
      background: url("english-engage-wordmark.png") center / 320% auto no-repeat;
    }

    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip-path: inset(50%);
      white-space: nowrap;
      border: 0;
    }

    .lead {
      max-width: 650px;
      margin: 18px 0 0;
      color: var(--muted);
      font-size: clamp(1.08rem, 2vw, 1.28rem);
    }

    .store-panel {
      justify-self: end;
      width: min(100%, 560px);
      border-left: 4px solid var(--coral);
      padding: 4px 0 4px 28px;
    }

    .store-panel p {
      margin: 0 0 18px;
      color: var(--muted);
      font-size: 1rem;
    }

    .store-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .store-button {
      min-width: 188px;
      min-height: 58px;
      display: inline-grid;
      grid-template-columns: 28px minmax(0, 1fr);
      align-items: center;
      gap: 12px;
      border-radius: 8px;
      padding: 10px 15px;
      background: var(--ink);
      color: var(--white);
      border: 1px solid rgba(255, 255, 255, 0.14);
      box-shadow: 0 16px 34px rgba(8, 34, 61, 0.18);
      transition: transform 160ms ease, background 160ms ease;
    }

    .store-button:hover {
      transform: translateY(-1px);
      background: #061a2f;
    }

    .store-button svg {
      width: 28px;
      height: 28px;
      fill: currentColor;
    }

    .store-kicker,
    .store-name {
      display: block;
      line-height: 1.1;
      letter-spacing: 0;
    }

    .store-kicker {
      opacity: 0.76;
      font-size: 0.72rem;
      font-weight: 700;
    }

    .store-name {
      margin-top: 3px;
      font-size: 1.04rem;
      font-weight: 850;
    }

    .section {
      border-top: 1px solid var(--line);
      padding: 72px 0;
    }

    .section-heading {
      display: grid;
      grid-template-columns: minmax(0, 0.75fr) minmax(0, 1fr);
      align-items: end;
      gap: 36px;
      margin-bottom: 34px;
    }

    h2 {
      margin: 0;
      font-size: clamp(2rem, 4vw, 3.4rem);
      line-height: 1;
      letter-spacing: 0;
    }

    .section-heading p {
      margin: 0;
      color: var(--muted);
      font-size: 1.05rem;
    }

    .features {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .feature {
      min-height: 196px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: var(--white);
      padding: 20px;
    }

    .feature mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 8px;
      margin-bottom: 18px;
      background: var(--cream);
      color: var(--coral-dark);
      font-weight: 900;
    }

    .feature h3 {
      margin: 0 0 10px;
      font-size: 1.08rem;
      letter-spacing: 0;
    }

    .feature p {
      margin: 0;
      color: var(--muted);
      font-size: 0.94rem;
    }

    .brand-section {
      position: relative;
      color: var(--white);
      background: #061a2f;
      overflow: hidden;
    }

    .brand-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(6, 26, 47, 0.94) 0%, rgba(6, 26, 47, 0.72) 46%, rgba(6, 26, 47, 0.18) 100%),
        url("english-engage-glow.png") center right / cover no-repeat;
    }

    .brand-content {
      position: relative;
      min-height: 390px;
      display: grid;
      align-content: center;
      max-width: 610px;
      padding: 78px 0;
    }

    .brand-content h2 {
      color: var(--white);
    }

    .brand-content p {
      margin: 18px 0 0;
      color: rgba(255, 255, 255, 0.78);
      font-size: 1.08rem;
    }

    .footer {
      border-top: 1px solid var(--line);
      padding: 26px 0;
      color: var(--muted);
      font-size: 0.92rem;
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .footer a {
      color: var(--ink);
      font-weight: 750;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 10px 14px;
    }

    @media (max-width: 920px) {
      .hero-download,
      .section-heading {
        grid-template-columns: 1fr;
      }

      .store-panel {
        justify-self: stretch;
        width: 100%;
      }

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

    @media (max-width: 640px) {
      .shell {
        width: min(100% - 28px, 1160px);
      }

      .nav {
        min-height: 64px;
      }

      .brand span {
        max-width: 130px;
        line-height: 1.05;
      }

      .nav-links {
        gap: 12px;
        font-size: 0.88rem;
      }

      .nav-links a:first-child {
        display: none;
      }

      .hero-download {
        padding: 42px 0 48px;
        gap: 28px;
      }

      h1 {
        font-size: 3.15rem;
      }

      .lead {
        font-size: 1.04rem;
      }

      .store-panel {
        border-left: 0;
        border-top: 4px solid var(--coral);
        padding: 22px 0 0;
      }

      .store-button {
        width: 100%;
      }

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

      .brand-section::before {
        background:
          linear-gradient(180deg, rgba(6, 26, 47, 0.9) 0%, rgba(6, 26, 47, 0.74) 100%),
          url("english-engage-glow.png") center / cover no-repeat;
      }

      .brand-content {
        min-height: 430px;
      }

      .footer-inner {
        align-items: flex-start;
        flex-direction: column;
      }

      .footer-links {
        justify-content: flex-start;
      }
    }