:root {
      --paper: #f5f5f3;
      --paper-bright: #ffffff;
      --ink: #090909;
      --ink-muted: #5d5d59;
      --clay: #090909;
      --spring: #d5d5d1;
      --mint: #e7e7e3;
      --river: #ddddda;
      --line: rgba(9, 9, 9, 0.24);
      --line-light: rgba(255, 255, 255, 0.28);
      --header-height: 72px;
      --page-gutter: clamp(22px, 3.2vw, 52px);
      --display: "Helvetica Neue", Helvetica, Arial, sans-serif;
      --body: "Helvetica Neue", Helvetica, Arial, sans-serif;
    }

    *, *::before, *::after { box-sizing: border-box; }

    html {
      scroll-behavior: smooth;
      background: var(--paper);
    }

    body {
      margin: 0;
      overflow-x: hidden;
      background: var(--paper);
      color: var(--ink);
      font-family: var(--body);
      line-height: 1.4;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    a { color: inherit; }
    img { display: block; max-width: 100%; }
    figure { margin: 0; }

    .skip-link {
      position: fixed;
      top: 12px;
      left: 12px;
      z-index: 100;
      padding: 10px 14px;
      transform: translateY(-150%);
      background: var(--paper-bright);
      color: var(--ink);
      font-weight: 700;
    }

    .skip-link:focus { transform: translateY(0); }

    .eyebrow {
      margin: 0;
      font-size: 0.75rem;
      font-weight: 760;
      letter-spacing: 0.15em;
      line-height: 1.2;
      text-transform: uppercase;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 30;
      height: var(--header-height);
      border-bottom: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.92);
      background: color-mix(in srgb, var(--paper) 92%, transparent);
      backdrop-filter: none;
    }

    .header-inner {
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      padding-inline: var(--page-gutter);
    }

    .site-mark {
      display: inline-flex;
      align-items: center;
      line-height: 0;
      text-decoration: none;
    }

    .site-mark-wordmark {
      width: 90px;
      height: 24px;
      display: block;
      object-fit: contain;
    }

    .site-nav {
      display: flex;
      align-items: center;
      gap: clamp(18px, 2.5vw, 40px);
    }

    .site-nav a {
      min-height: 44px;
      display: flex;
      align-items: center;
      font-size: 0.75rem;
      font-weight: 680;
      letter-spacing: 0.06em;
      text-decoration: none;
      text-transform: uppercase;
    }

    .site-nav a:hover,
    .site-nav a[aria-current="page"] { color: var(--clay); }

    .game-hero {
      min-height: calc(100svh - var(--header-height));
      display: grid;
      grid-template-columns: minmax(0, 52%) minmax(380px, 48%);
      border-bottom: 1px solid var(--ink);
      background: var(--ink);
      color: var(--paper);
    }

    .hero-copy {
      min-width: 0;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 52px;
      padding: clamp(34px, 4vw, 58px) var(--page-gutter) clamp(42px, 5vw, 72px);
    }

    .hero-copy .eyebrow { color: var(--spring); }

    .game-title {
      margin: auto 0 0 -0.05em;
      font-family: var(--display);
      font-size: clamp(5rem, 9.4vw, 11.2rem);
      font-weight: 730;
      letter-spacing: -0.078em;
      line-height: 0.77;
    }

    .hero-bottom {
      display: grid;
      grid-template-columns: minmax(0, 1fr);
      align-items: end;
      gap: 14px;
    }

    .hero-lede {
      max-width: 650px;
      margin: 0;
      color: rgba(255, 255, 255, 0.84);
      font-size: clamp(1.14rem, 1.65vw, 1.55rem);
      font-weight: 540;
      letter-spacing: -0.025em;
      line-height: 1.28;
      text-wrap: pretty;
    }

    .hero-detail {
      max-width: 650px;
      margin: 0;
      color: rgba(255, 255, 255, 0.68);
      font-size: clamp(0.95rem, 1.15vw, 1.08rem);
      line-height: 1.5;
      text-wrap: pretty;
    }

    .hero-art {
      position: relative;
      min-width: 0;
      min-height: 0;
      overflow: hidden;
      border-left: 1px solid var(--line-light);
      background: var(--spring);
    }

    .hero-art img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: 50% 52%;
      transition: transform 750ms cubic-bezier(.2,.7,.2,1);
    }

    .task-section {
      display: grid;
      grid-template-columns: minmax(360px, 46%) minmax(0, 54%);
      min-height: 650px;
      border-bottom: 1px solid var(--ink);
      background: var(--paper-bright);
    }

    .task-panel {
      display: flex;
      align-items: center;
      padding: clamp(28px, 5vw, 76px) var(--page-gutter);
      border-right: 1px solid var(--ink);
    }

    .task-interface {
      width: 100%;
      max-width: 620px;
      margin-inline: auto;
    }

    .task-head {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 20px;
      padding-bottom: 19px;
      border-bottom: 2px solid var(--ink);
    }

    .task-head strong {
      font-family: var(--display);
      font-size: 1.45rem;
      letter-spacing: -0.03em;
    }

    .task-head span { color: var(--clay); }

    .task-row {
      min-height: 74px;
      display: grid;
      grid-template-columns: 22px minmax(0, 1fr);
      align-items: center;
      gap: 15px;
      border-bottom: 1px solid var(--line);
      font-size: 0.95rem;
      font-weight: 650;
    }

    .task-check {
      width: 18px;
      height: 18px;
      border: 2px solid var(--ink);
    }

    .task-row.is-done .task-check {
      background: var(--spring);
      box-shadow: inset 0 0 0 4px var(--paper-bright);
    }

    .focus-bar {
      display: grid;
      grid-template-columns: 1fr auto;
      align-items: center;
      gap: 20px;
      margin-top: 24px;
      padding: 18px 20px;
      border: 1px solid rgba(9, 9, 9, 0.04);
      border-radius: 14px;
      background: var(--ink);
      color: var(--paper);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    }

    .focus-bar strong {
      font-size: 0.75rem;
      letter-spacing: 0.13em;
      text-transform: uppercase;
    }

    .focus-meter {
      position: relative;
      width: 112px;
      height: 10px;
      overflow: hidden;
      border-radius: 999px;
      background: rgba(9, 9, 9, 0.04);
    }

    .focus-meter::after {
      content: "";
      position: absolute;
      inset: 0 32% 0 0;
      border-radius: inherit;
      background: var(--mint);
    }

    .task-copy {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 60px;
      padding: clamp(42px, 6vw, 88px) var(--page-gutter);
    }

    .task-copy .eyebrow { color: var(--clay); }

    .task-title {
      max-width: 850px;
      margin: auto 0 0;
      font-family: var(--display);
      font-size: clamp(4rem, 7vw, 8.1rem);
      font-weight: 680;
      letter-spacing: -0.067em;
      line-height: 0.87;
      text-wrap: balance;
    }

    .task-description {
      max-width: 560px;
      margin: 0;
      color: var(--ink-muted);
      font-size: clamp(1.05rem, 1.45vw, 1.35rem);
      line-height: 1.45;
    }

    .learn-section,
    .questions-section {
      padding: clamp(72px, 9vw, 130px) var(--page-gutter);
      border-bottom: 1px solid var(--ink);
      background: var(--paper);
    }

    .learn-heading {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
      gap: clamp(40px, 8vw, 130px);
      align-items: end;
      margin-bottom: clamp(48px, 7vw, 92px);
    }

    .learn-heading h2 {
      max-width: 820px;
      margin: 14px 0 0;
      font-family: var(--display);
      font-size: clamp(3.2rem, 6.5vw, 7.4rem);
      font-weight: 680;
      letter-spacing: -0.064em;
      line-height: 0.88;
    }

    .learn-heading p:last-child {
      max-width: 470px;
      margin: 0;
      color: var(--ink-muted);
      font-size: clamp(1rem, 1.35vw, 1.2rem);
      line-height: 1.5;
    }

    .learn-links {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      border-top: 1px solid var(--ink);
    }

    .learn-link {
      min-height: 220px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 36px;
      padding: 28px 28px 30px 0;
      border-right: 1px solid var(--line);
      color: var(--ink);
      text-decoration: none;
    }

    .learn-link + .learn-link { padding-left: 28px; }
    .learn-link:last-child { border-right: 0; }
    .learn-link:hover strong { color: var(--clay); }
    .learn-link strong {
      max-width: 290px;
      font-family: var(--display);
      font-size: clamp(1.7rem, 2.8vw, 3rem);
      font-weight: 650;
      letter-spacing: -0.045em;
      line-height: 0.98;
    }

    .learn-link span:last-child {
      color: var(--ink-muted);
      font-size: 0.78rem;
      font-weight: 680;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .questions-section {
      background: var(--paper-bright);
    }

    .questions-heading {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
      gap: clamp(40px, 8vw, 130px);
      align-items: end;
      margin-bottom: clamp(44px, 6vw, 78px);
    }

    .questions-heading h2 {
      max-width: 820px;
      margin: 14px 0 0;
      font-family: var(--display);
      font-size: clamp(3.2rem, 6.5vw, 7rem);
      font-weight: 680;
      letter-spacing: -0.064em;
      line-height: 0.88;
    }

    .questions-heading p:last-child {
      max-width: 470px;
      margin: 0;
      color: var(--ink-muted);
      font-size: clamp(1rem, 1.35vw, 1.2rem);
      line-height: 1.5;
    }

    .question-list {
      border-top: 1px solid var(--ink);
    }

    .question {
      display: grid;
      grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.25fr);
      gap: clamp(32px, 7vw, 120px);
      padding: clamp(28px, 4vw, 48px) 0;
      border-bottom: 1px solid var(--line);
    }

    .question:last-child { border-bottom: 0; }

    .question h3,
    .question p {
      margin: 0;
    }

    .question h3 {
      font-family: var(--display);
      font-size: clamp(1.5rem, 2.2vw, 2.4rem);
      font-weight: 650;
      letter-spacing: -0.04em;
      line-height: 1;
    }

    .question p {
      max-width: 680px;
      color: var(--ink-muted);
      font-size: clamp(1rem, 1.25vw, 1.16rem);
      line-height: 1.55;
    }

    .site-footer {
      display: grid;
      grid-template-columns: 1fr auto auto;
      align-items: center;
      gap: clamp(24px, 4vw, 70px);
      min-height: 116px;
      padding: 28px var(--page-gutter);
      background: var(--paper);
    }

    .footer-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .footer-links a,
    .copyright {
      color: var(--ink-muted);
      font-size: 0.75rem;
      font-weight: 620;
      text-decoration: none;
    }

    .footer-links a:hover { color: var(--clay); }

    :focus-visible {
      outline: 3px solid var(--clay);
      outline-offset: 5px;
    }

    @media (max-width: 960px) {
      .game-hero { grid-template-columns: minmax(0, 55%) minmax(330px, 45%); }
      .task-section { grid-template-columns: minmax(330px, 48%) minmax(0, 52%); }
    }

    @media (max-width: 720px) {
      :root {
        --header-height: 64px;
        --page-gutter: 20px;
      }

      .game-hero,
      .task-section { grid-template-columns: 1fr; }

      .hero-copy { min-height: 590px; }
      .game-title { font-size: clamp(4.5rem, 21.5vw, 8.2rem); }
      .hero-bottom { grid-template-columns: 1fr; }
      .hero-art { min-height: 120vw; max-height: 720px; border-top: 1px solid var(--line-light); border-left: 0; }

      .task-panel { min-height: 520px; border-right: 0; border-bottom: 1px solid var(--ink); }
      .task-copy { min-height: 580px; }
      .task-title { font-size: clamp(4.2rem, 18vw, 6.4rem); }

      .learn-heading,
      .questions-heading,
      .learn-links { grid-template-columns: 1fr; }
      .question {
        grid-template-columns: 1fr;
        gap: 14px;
      }
      .learn-link,
      .learn-link + .learn-link {
        min-height: 170px;
        padding: 24px 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
      }
      .learn-link:last-child { border-bottom: 0; }
    }

    @media (max-width: 520px) {
      .site-nav { gap: 16px; }

      .task-row {
        grid-template-columns: 22px minmax(0, 1fr);
        gap: 12px;
        padding-block: 14px;
      }

      .focus-meter { width: 78px; }

      .site-footer {
        grid-template-columns: 1fr;
        align-items: start;
      }

      .footer-links { flex-wrap: wrap; }
    }

    @media (max-width: 340px) {
      .game-title {
        font-size: 4rem;
        letter-spacing: -0.07em;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
      }
    }