@layer reset, base, layout, responsive;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body, h1, h2, h3, p, ol { margin: 0; }
  ol { padding: 0; list-style: none; }
  a { color: inherit; text-decoration: none; }
}

@layer base {
  :root {
    --paper: #f5f2ec;
    --paper-deep: #ebe4da;
    --ink: #1d1b18;
    --muted: #777168;
    --rule: rgba(29, 27, 24, 0.24);
    --accent: #7f302b;
    --page: clamp(1.25rem, 3.5vw, 4rem);
    --serif: "Iowan Old Style", "Baskerville", "Times New Roman", serif;
    --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  }

  body {
    min-width: 20rem;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  h1, h2, h3, .wordmark, .footer-wordmark {
    font-family: var(--serif);
    font-weight: 400;
  }

  h1, h2 { text-wrap: balance; }
  p { text-wrap: pretty; }

  a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
  }

  ::selection {
    background: var(--accent);
    color: var(--paper);
  }

  .skip-link {
    position: fixed;
    z-index: 10;
    top: 0.75rem;
    left: 0.75rem;
    min-height: 44px;
    padding: 0.65rem 1rem;
    background: var(--ink);
    color: var(--paper);
    transform: translateY(-160%);
    transition: transform 180ms ease;
  }

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

  .section-label,
  .eyebrow,
  .number {
    color: var(--muted);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }
}

@layer layout {
  .site-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    min-height: 5rem;
    padding: 0 var(--page);
    border-bottom: 1px solid var(--rule);
  }

  .wordmark {
    justify-self: start;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    font-size: 1.3rem;
  }

  .header-note {
    color: var(--muted);
    font-family: var(--serif);
    font-size: 0.88rem;
    font-style: italic;
  }

  nav {
    justify-self: end;
    display: flex;
    gap: clamp(0.6rem, 2vw, 1.8rem);
  }

  nav a,
  .down-link {
    position: relative;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    font-size: 0.78rem;
  }

  nav a::after,
  .down-link::after {
    position: absolute;
    right: 0;
    bottom: 7px;
    left: 0;
    height: 1px;
    background: currentColor;
    content: "";
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 220ms ease;
  }

  nav a:hover::after,
  nav a:focus-visible::after,
  .down-link:hover::after,
  .down-link:focus-visible::after {
    transform: scaleX(1);
    transform-origin: left;
  }

  .hero {
    min-height: min(48rem, calc(100svh - 5rem));
    display: grid;
    grid-template-rows: auto 1fr auto;
    padding: clamp(2rem, 4vh, 3rem) var(--page) clamp(2.5rem, 4vh, 3.5rem);
  }

  .eyebrow { align-self: start; }

  .hero h1 {
    align-self: center;
    max-width: 11ch;
    font-size: clamp(4.5rem, 11vw, 10.5rem);
    letter-spacing: -0.065em;
    line-height: 0.83;
  }

  .hero-bottom {
    display: grid;
    grid-template-columns: minmax(14rem, 1.1fr) minmax(16rem, 1.35fr) 0.55fr;
    gap: clamp(2rem, 5vw, 6rem);
    align-items: end;
    max-width: 72rem;
    margin-left: auto;
  }

  .hero-intro {
    font-family: var(--serif);
    font-size: clamp(1.25rem, 2vw, 1.7rem);
    line-height: 1.3;
  }

  .hero-detail {
    max-width: 34rem;
    color: var(--muted);
    font-size: 0.94rem;
  }

  .down-link {
    justify-self: end;
    color: var(--accent);
    font-weight: 600;
    gap: 0.65rem;
  }

  .premise {
    display: grid;
    grid-template-columns: 0.5fr minmax(18rem, 1.7fr) minmax(15rem, 0.8fr);
    gap: clamp(2rem, 6vw, 7rem);
    align-items: start;
    padding: clamp(4.5rem, 8vw, 8rem) var(--page);
    border-top: 1px solid var(--rule);
  }

  .premise h2 {
    max-width: 10ch;
    font-size: clamp(3.6rem, 7.8vw, 8rem);
    letter-spacing: -0.06em;
    line-height: 0.9;
  }

  .premise > p:not(.section-label) {
    grid-column: 3;
    color: var(--muted);
    font-size: 1rem;
  }


  .hunt {
    padding: clamp(4.5rem, 7vw, 7rem) var(--page);
    background: var(--paper-deep);
  }

  .section-heading {
    display: grid;
    grid-template-columns: 0.5fr 2.5fr;
    gap: clamp(2rem, 6vw, 7rem);
    align-items: start;
    margin-bottom: clamp(3.5rem, 5vw, 5rem);
  }

  .section-heading h2 {
    font-size: clamp(3.5rem, 7vw, 7.5rem);
    letter-spacing: -0.055em;
    line-height: 0.9;
  }

  .steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(2rem, 5vw, 6rem);
    margin-left: calc(20% + 1rem);
  }

  .steps li {
    padding-top: 1rem;
    border-top: 1px solid var(--ink);
  }

  .number { display: block; margin-bottom: clamp(2rem, 4vw, 4rem); }

  .steps h3 {
    max-width: 12ch;
    margin-bottom: 1rem;
    font-size: clamp(1.5rem, 2.4vw, 2.25rem);
    line-height: 1.05;
  }

  .steps p {
    max-width: 25rem;
    color: var(--muted);
    font-size: 0.9rem;
  }

  .partners {
    display: grid;
    grid-template-rows: auto 1fr;
    padding: clamp(4.5rem, 8vw, 8rem) var(--page);
    border-top: 1px solid var(--rule);
  }

  .partners-grid {
    align-self: center;
    display: grid;
    grid-template-columns: 1.45fr 0.55fr;
    gap: clamp(3rem, 10vw, 12rem);
    align-items: start;
  }

  .partners h2 {
    max-width: 12ch;
    font-size: clamp(3.5rem, 7.5vw, 8rem);
    letter-spacing: -0.06em;
    line-height: 0.9;
  }

  .partners-copy {
    padding-top: 0.8rem;
    color: var(--muted);
  }

  .partners-copy p + p { margin-top: 2rem; }

  .partners-copy .principles {
    color: var(--ink);
    font-family: var(--serif);
    font-size: 1.35rem;
    line-height: 1.25;
  }

  footer {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 2rem;
    align-items: center;
    min-height: 5.5rem;
    padding: 1rem var(--page);
    border-top: 1px solid var(--rule);
    color: var(--muted);
    font-size: 0.75rem;
  }

  .footer-wordmark {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    color: var(--ink);
    font-size: 1.2rem;
  }
}

@layer responsive {
  @media (max-width: 56rem) {
    .site-header {
      grid-template-columns: 1fr auto;
    }

    .header-note { display: none; }

    .hero h1 { font-size: clamp(4.2rem, 16vw, 8rem); }

    .hero-bottom {
      grid-template-columns: 1fr 1fr;
      margin-top: 4rem;
    }

    .down-link {
      grid-column: 1 / -1;
      justify-self: start;
    }

    .premise {
      min-height: auto;
      grid-template-columns: 1fr 3fr;
    }

    .premise h2 { grid-column: 2; }
    .premise > p:not(.section-label) { grid-column: 2; }
    .premise > p:last-child { margin-top: 1rem; }

    .steps { margin-left: 0; }

    .partners { min-height: auto; }
    .partners-grid { grid-template-columns: 1fr; }
    .partners-copy { max-width: 32rem; margin-left: auto; }
  }

  @media (max-width: 42rem) {
    .site-header {
      min-height: 4.5rem;
      padding: 0 1.25rem;
    }

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

    .hero {
      min-height: auto;
      padding: 2rem 1.25rem 2.5rem;
    }

    .hero h1 {
      align-self: center;
      max-width: 9ch;
      font-size: clamp(4rem, 22vw, 6.2rem);
      line-height: 0.86;
    }

    .hero-bottom {
      grid-template-columns: 1fr;
      gap: 1.4rem;
      margin-top: 3rem;
    }

    .hero-intro { max-width: 20rem; }
    .hero-detail { max-width: 28rem; }

    .premise,
    .hunt,
    .partners {
      padding: 4.5rem 1.25rem;
    }

    .premise {
      grid-template-columns: 1fr;
      gap: 2.25rem;
    }

    .premise h2,
    .premise > p:not(.section-label) {
      grid-column: 1;
    }

    .premise h2,
    .section-heading h2,
    .partners h2 {
      font-size: clamp(3.25rem, 16vw, 5rem);
    }

    .premise > p:last-child { margin-top: -1rem; }

    .section-heading {
      grid-template-columns: 1fr;
      gap: 2rem;
      margin-bottom: 3.5rem;
    }

    .steps {
      grid-template-columns: 1fr;
      gap: 3.5rem;
    }

    .number { margin-bottom: 2rem; }

    .partners-grid { gap: 3rem; }
    .partners-copy { margin-left: 0; }

    footer {
      grid-template-columns: 1fr;
      gap: 0.3rem;
      padding: 2rem 1.25rem;
    }
  }

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