@layer reset, fonts, base, layout, detail, motion;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  body, h1, h2, h3, p, figure, ul, ol, dl, dd { margin: 0; }
  img { display: block; max-width: 100%; height: auto; }
  button, summary { -webkit-tap-highlight-color: transparent; }
  [hidden] { display: none !important; }
}

@layer fonts {
  @font-face {
    font-family: "PT Serif";
    src: url("pto-pt-serif-body.056dc84a33.woff") format("woff");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
  }
  @font-face {
    font-family: "PT Serif";
    src: url("pto-pt-serif-bold.2ab03f3a1e.woff") format("woff");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
  }
  @font-face {
    font-family: "PT Serif Caption";
    src: url("pto-pt-serif-accent.5dfdff0473.woff") format("woff");
    font-weight: 400;
    font-style: italic;
    font-display: swap;
  }
}

@layer base {
  :root {
    color-scheme: light;
    --ink: #1a1a1a;
    --slate: #373a46;
    --paper: #fff;
    --wash: #fcfcfc;
    --line: #e4e4e6;
    --measure: 66ch;
  }
  html { scroll-padding-top: 2rem; }
  body {
    background: var(--paper);
    color: var(--ink);
    font-family: "PT Serif", Georgia, serif;
    font-size: 17px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
  }
  p, li, dd { max-width: var(--measure); }
  p + p { margin-top: 1rem; }
  h1, h2, h3 { font-weight: 400; line-height: 1.12; text-wrap: balance; }
  h1 { font-size: clamp(46px, 5.56vw, 80px); letter-spacing: -.047em; }
  h1 em {
    display: block;
    margin-top: .07em;
    font-family: "PT Serif Caption", Georgia, serif;
    font-size: 1.25em;
    font-weight: 400;
    letter-spacing: -.055em;
  }
  h2, article [data-guide-row] h3 { font-size: clamp(29px, 3vw, 42px); letter-spacing: -.03em; }
  h3 { font-size: 23px; }
  a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .22em; }
  a:hover { text-decoration-thickness: 2px; }
  a, button, summary { min-height: 44px; }
  a { display: inline-flex; align-items: center; }
  button, summary { font: inherit; font-size: 16px; cursor: pointer; }
  button { color: var(--ink); }
  :focus-visible { outline: 2px solid var(--slate); outline-offset: 5px; }
  ul, ol { padding-left: 1.35rem; }
  li + li { margin-top: .8rem; }
  strong { font-weight: 700; }
  small { font-size: 16px; }
  svg { flex: none; }
  summary { list-style: none; }
  summary::-webkit-details-marker { display: none; }
  details > summary { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
  details > summary::after { content: "+"; font-family: Georgia, serif; font-size: 24px; line-height: 1; }
  details[open] > summary::after { content: "−"; }
}

@layer layout {
  body > header, main, body > footer { width: min(1280px, calc(100% - 112px)); margin-inline: auto; }
  body > header { position: relative; z-index: 5; display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding-block: 27px; border-bottom: 1px solid var(--line); }
  body > header > a { gap: 13px; text-decoration: none; font-size: 18px; line-height: 1.3; }
  body > header > a span { display: block; }
  body > header > details { position: relative; flex: none; }
  body > header > details > summary { border: 1px solid var(--line); border-radius: 100px; padding: 9px 21px; background: var(--paper); gap: 25px; }
  body > header nav { position: absolute; right: 0; top: calc(100% + 15px); width: 410px; max-width: calc(100vw - 48px); padding: 15px 24px; border: 1px solid var(--line); background: var(--paper); border-radius: 22px; box-shadow: 0 18px 65px #1a1a1a14; }
  body > header nav > a { width: 100%; padding-block: 7px; }
  body > header nav details { border-top: 1px solid var(--line); padding-block: 8px; }
  body > header nav details a { width: 100%; padding: 8px 0 8px 18px; text-decoration: none; }
  body > header nav a[aria-current="page"] { font-weight: 700; text-decoration: underline; }
  body > header nav details a:hover { text-decoration: underline; }
  main > header { position: relative; display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 50px; align-items: center; padding: 102px 0 72px; }
  main > header > div { position: relative; z-index: 1; }
  main > header > div > p:first-child { margin-bottom: 28px; color: var(--slate); font-size: 16px; }
  main > header > div > p:not(:first-child) { margin-top: 27px; max-width: 49ch; color: var(--slate); font-size: 18px; line-height: 1.6; }
  main > header figure { align-self: center; }
  main > header figure img { width: 100%; }
  main > header figcaption { color: var(--slate); text-align: center; max-width: 32ch; margin: 8px auto 0; font-size: 16px; }
  main > header + aside { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; padding: 20px 0; border-block: 1px solid var(--line); color: var(--slate); font-size: 16px; }
  main > header + aside > p { max-width: 46ch; }
  main > header + aside > div { display: flex; align-items: center; flex-wrap: wrap; gap: 15px; }
  article { max-width: 1130px; margin-inline: auto; }
  article [data-guide-row] { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.5fr); gap: 80px; padding: 64px 0; border-bottom: 1px solid var(--line); }
  article [data-guide-row] > div:first-child > p { margin-bottom: 14px; font-size: 16px; color: var(--slate); }
  article [data-guide-row] > div:last-child > a { margin-top: 16px; }
  article [data-even-row] > div:first-child { padding-left: 28px; }
  article [data-guide-row] > div:last-child { min-width: 0; }
  article [data-guide-row] aside { margin-top: 25px; border-left: 2px solid #b8b9c0; padding: 0 0 0 22px; color: var(--slate); }
  article [data-guide-row] aside > p:first-child { font-size: 16px; margin-bottom: 7px; }
  article [data-guide-row] aside > p + p { margin-top: 0; }
  article [data-guide-row] ul { margin-top: 10px; }
  main > section { margin-top: 75px; padding-block: 48px; background: var(--wash); border: 1px solid var(--line); border-radius: 28px; }
  main > section > div { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.5fr); gap: 60px; padding-inline: 54px; }
  main > section h2 { font-size: 29px; }
  main > section dl > div + div { margin-top: 18px; }
  main > section dt { font-weight: 700; font-size: 17px; }
  main > section dd a { color: var(--slate); font-size: 16px; overflow-wrap: anywhere; }
  main > nav { display: flex; justify-content: space-between; align-items: center; gap: 30px; padding-block: 60px 70px; }
  main > nav p { font-size: 16px; color: var(--slate); margin-bottom: 10px; }
  main > nav > div > a { font-size: 27px; line-height: 1.3; text-decoration: none; gap: 28px; }
  main > nav > a { color: var(--slate); font-size: 16px; }
  body > footer { display: flex; justify-content: space-between; align-items: center; gap: 40px; padding-block: 34px; border-top: 1px solid var(--line); color: var(--slate); font-size: 16px; }
  body > footer p { max-width: 67ch; }
  body > footer a { flex: none; }
  @media (min-width: 1600px) { main > header { padding-top: 120px; } }
  @media (max-width: 950px) {
    body > header, main, body > footer { width: calc(100% - 64px); }
    main > header { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 20px; padding-top: 70px; }
    h1 { font-size: 54px; }
    article [data-guide-row] { gap: 40px; }
    main > section > div { gap: 35px; padding-inline: 30px; }
  }
  @media (max-width: 650px) {
    body > header, main, body > footer { width: calc(100% - 40px); }
    body > header { gap: 12px; padding-block: 18px; }
    body > header > a { font-size: 16px; gap: 9px; }
    body > header > a svg { width: 26px; height: 29px; }
    body > header > details > summary { padding: 9px 15px; gap: 14px; }
    body > header nav { right: 0; max-width: calc(100vw - 40px); padding: 12px 20px; }
    main > header { display: flex; flex-direction: column; gap: 34px; align-items: stretch; padding: 55px 0 32px; }
    h1 { font-size: 46px; letter-spacing: -.045em; }
    h1 em { font-size: 1.16em; }
    main > header > div > p:first-child { margin-bottom: 22px; }
    main > header > div > p:not(:first-child) { font-size: 17px; margin-top: 24px; }
    main > header figure { width: min(100%, 290px); }
    main > header figure img { max-height: 260px; object-fit: contain; }
    main > header figcaption { margin-top: 0; }
    main > header + aside { align-items: flex-start; flex-direction: column; padding-block: 19px; }
    main > header + aside > div { gap: 10px 14px; }
    article [data-guide-row] { display: block; padding: 40px 0; }
    article [data-guide-row] > div:last-child { margin-top: 22px; }
    article [data-even-row] > div:first-child { padding-left: 0; }
    h2, article [data-guide-row] h3 { font-size: 31px; line-height: 1.16; }
    main > section { margin-top: 45px; padding-block: 28px; border-radius: 22px; }
    main > section > div { display: block; padding-inline: 22px; }
    main > section dl { margin-top: 24px; }
    main > nav { padding-block: 42px; align-items: flex-start; flex-direction: column; gap: 22px; }
    main > nav > div > a { font-size: 24px; }
    body > footer { align-items: flex-start; flex-direction: column; gap: 15px; padding-block: 28px; }
  }
}

@layer detail {
  body > a:first-child { position: fixed; left: 20px; top: -100px; z-index: 20; padding: 10px 18px; background: var(--ink); color: #fff; border-radius: 12px; }
  body > a:first-child:focus { top: 12px; }
  main > header::before { content: ""; position: absolute; inset: -20px -25px 0; background: radial-gradient(ellipse at 87% 33%, #efeff1a6, #fcfcfc00 57%); pointer-events: none; z-index: -1; }
  main > header > div > a { margin-top: 30px; padding: 15px 24px; min-height: 58px; gap: 38px; text-decoration: none; background: var(--ink); color: #fff; border: 1px solid #373a46; border-radius: 100px; box-shadow: 0 5px 0 #373a46, 0 10px 20px #1a1a1a0b; font-size: 17px; line-height: 1.3; }
  main > header > div > a:hover { background: var(--slate); }
  main > header + aside button { border: 1px solid var(--line); border-radius: 100px; background: var(--wash); padding: 9px 17px; }
  main > header + aside button[aria-pressed="true"] { color: #fff; background: var(--slate); border-color: var(--slate); }
  article [data-guide-row] > div:last-child > a { border-bottom: 1px solid var(--ink); gap: 18px; text-decoration: none; }
  article [data-guide-row] :is(h2, h3) a { min-height: 44px; text-decoration: none; gap: 18px; }
  article [data-guide-row] :is(h2, h3) a:hover { text-decoration: underline; }
  article [data-guide-row][data-urgent] { border-top: 2px solid var(--ink); }
  article [data-guide-row][data-urgent] > div:last-child { padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: var(--wash); }
  main > section dl { counter-reset: note; }
  main > section dl > div { counter-increment: note; position: relative; padding-left: 29px; }
  main > section dl > div::before { content: counter(note, lower-alpha) "."; position: absolute; left: 0; top: 0; color: var(--slate); font-size: 16px; }
  main > nav > div > a span { display: inline-flex; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 50%; }
  @media (max-width: 650px) {
    main > header > div > a { gap: 20px; max-width: 100%; padding: 15px 20px; font-size: 16px; }
    main > header::before { inset-inline: 0; }
    article [data-guide-row][data-urgent] > div:last-child { padding: 20px; }
  }
}

@layer motion {
  @media (prefers-reduced-motion: no-preference) {
    main > header::before { animation: drift 28s ease-in-out infinite alternate; }
    main > header figure img { animation: breathe 19s ease-in-out infinite alternate; }
    @keyframes drift { from { opacity: .5; transform: translateY(-10px); } to { opacity: 1; transform: translateY(10px); } }
    @keyframes breathe { from { transform: translateY(0); } to { transform: translateY(-5px); } }
  }
}