@layer foundation, frame, reading, diagrams, controls, responsive;

@layer foundation {
  :root {
    color-scheme: light;
    --paper: #f5f3ed;
    --sheet: #fffef9;
    --ink: #232e2b;
    --quiet: #4c5b55;
    --pine: #294a41;
    --wash: #e9eee6;
    --rule: #a7afa3;
    --accent: #8b522d;
    --sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --serif: Georgia, "Times New Roman", serif;
    --mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-family: var(--sans);
    font-size: 16px;
    background: var(--paper);
    color: var(--ink);
  }
  *, *::before, *::after { box-sizing: border-box; }
  body { margin: 0; font-size: 18px; line-height: 1.65; }
  h1, h2, p, ul, ol, figure { margin: 0; }
  h1, h2 { font-family: var(--serif); font-weight: 400; }
  a { color: var(--pine); text-underline-offset: .22em; text-decoration-thickness: 1px; }
  a:hover { text-decoration-thickness: 2px; }
  a, button, summary { -webkit-tap-highlight-color: #d5e1d4; }
  button, summary { font: inherit; }
  button { color: inherit; }
  a:focus-visible, button:focus-visible, summary:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 4px;
  }
  main:focus { outline: none; }
  strong { font-weight: 650; }
  svg, img { max-width: 100%; }
  [hidden] { display: none !important; }
}

@layer frame {
  .guide-layout { display: grid; grid-template-columns: 286px minmax(0, 1fr); }
  .care-index {
    position: sticky;
    top: 0;
    align-self: start;
    max-height: 100dvh;
    overflow-y: auto;
    padding: 30px 22px 24px;
    border-right: 1px solid var(--rule);
    background: var(--paper);
    scrollbar-width: thin;
    scrollbar-color: var(--rule) var(--paper);
  }
  .index-home {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 48px;
    font-size: 18px;
    font-weight: 650;
    text-decoration: none;
  }
  .index-mark { position: relative; flex: 0 0 26px; height: 26px; border: 1px solid var(--pine); }
  .index-mark::before, .index-mark::after { content: ""; position: absolute; background: var(--pine); }
  .index-mark::before { width: 36px; height: 1px; left: -6px; top: 12px; }
  .index-mark::after { height: 36px; width: 1px; top: -6px; left: 12px; }
  .index-purpose { padding: 16px 0 25px 40px; color: var(--quiet); font-size: 16px; line-height: 1.5; }
  .index-disclosure > summary { display: none; }
  .index-group { border-top: 1px solid var(--rule); padding: 15px 0 12px; }
  .index-group-name { font-family: var(--mono); font-size: 16px; color: var(--quiet); margin-bottom: 5px; }
  .index-group ul { list-style: none; padding: 0; }
  .index-group a {
    display: flex;
    align-items: center;
    min-height: 46px;
    padding: 9px 12px;
    font-size: 16px;
    line-height: 1.4;
    text-decoration: none;
    border-left: 2px solid transparent;
  }
  .index-group a:hover { background: var(--wash); }
  .index-group a[aria-current="page"] { background: var(--pine); color: var(--sheet); border-left-color: var(--accent); }
  .index-domain { border-top: 1px solid var(--rule); padding-top: 18px; font-family: var(--mono); font-size: 16px; overflow-wrap: anywhere; }
  .guide-sheet { min-width: 0; padding: 36px clamp(28px, 4.5vw, 78px) 0; }
  main, .guide-footer { max-width: 1080px; margin-inline: auto; }
  .reading-trail { margin-bottom: 34px; }
  .reading-trail ol { display: flex; flex-wrap: wrap; align-items: center; gap: 5px 16px; padding: 0; list-style: none; }
  .reading-trail li { display: flex; align-items: center; gap: 16px; font-size: 16px; }
  .reading-trail a { display: inline-flex; align-items: center; min-height: 44px; min-width: 44px; }
  .reading-trail [aria-current] { color: var(--quiet); }
  .skip-reading { position: fixed; z-index: 10; top: 12px; left: 12px; padding: 12px 18px; background: var(--pine); color: var(--sheet); transform: translateY(-180%); }
  .skip-reading:focus { transform: none; }
}

@layer reading {
  .guide-intro { position: relative; border-top: 1px solid var(--pine); padding-top: 24px; max-width: 760px; }
  .guide-intro::before { content: ""; position: absolute; width: 13px; height: 13px; border-top: 1px solid var(--pine); border-left: 1px solid var(--pine); top: -7px; left: -7px; }
  .guide-kicker { font: 16px/1.5 var(--mono); color: var(--quiet); margin-bottom: 22px; }
  h1 { font-size: clamp(38px, 3.8vw, 58px); line-height: 1.12; letter-spacing: -.025em; text-wrap: balance; max-width: 20ch; }
  .guide-deck { margin-top: 24px; max-width: 60ch; font-size: 20px; line-height: 1.55; }
  .label-check { margin-top: 22px; font: 16px/1.5 var(--mono); color: var(--quiet); }
  .orientation-opening { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(270px, 1fr); gap: 44px; padding-top: 40px; align-items: start; }
  .orientation-opening h1 { font-size: clamp(46px, 4.2vw, 66px); max-width: 13ch; }
  .orientation-opening .guide-deck { max-width: 39ch; }
  .start-links { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; margin-top: 32px; }
  .start-link { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 13px 18px; min-height: 50px; background: var(--pine); color: var(--sheet); border: 1px solid var(--pine); text-decoration: none; font-size: 17px; }
  .quiet-link { background: transparent; color: var(--pine); border-color: var(--rule); }
  .reading-body { max-width: 72ch; margin-top: 64px; }
  .care-idea { position: relative; padding: 34px 0 38px; border-top: 1px solid var(--rule); }
  .care-idea::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; background: var(--paper); border: 1px solid var(--pine); }
  h2 { font-size: clamp(27px, 2.5vw, 35px); line-height: 1.25; text-wrap: balance; max-width: 32ch; margin-bottom: 22px; }
  .care-idea > p, .claim-pair > p, .myth-answer > p { max-width: 68ch; }
  .care-idea > p + p, .care-idea > p + .claim-pair, .care-idea > .claim-pair + p, .care-idea > .claim-pair + .claim-pair { margin-top: 22px; }
  .claim-pair { padding-left: 20px; border-left: 1px solid var(--pine); }
  .claim-source { display: flex; align-items: center; gap: 9px; width: fit-content; max-width: 100%; min-height: 44px; min-width: 44px; padding: 8px 0; font-size: 16px; line-height: 1.5; }
  .source-record { display: block; padding-top: 10px; color: var(--quiet); font: 16px/1.5 var(--mono); }
  .question-notes { list-style: none; padding: 0; margin: 8px 0 22px; max-width: 66ch; }
  .question-notes li { position: relative; padding: 14px 12px 14px 32px; border-bottom: 1px solid var(--rule); }
  .question-notes li::before { content: ""; position: absolute; left: 0; top: 24px; height: 9px; width: 9px; border: 1px solid var(--pine); }
  .topic-link { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 50px; max-width: 64ch; padding: 13px 0; border-bottom: 1px solid var(--rule); }
  .care-idea > p + .topic-link, .care-idea > .claim-pair + .topic-link { margin-top: 18px; }
  .next-topic { max-width: 72ch; padding: 20px 0 64px; }
  .next-topic > a { position: relative; display: grid; grid-template-columns: 1fr auto; padding: 22px 24px; border: 1px solid var(--pine); text-decoration: none; background: var(--wash); }
  .next-topic a > span:first-child { font: 16px/1.5 var(--mono); grid-column: 1; margin-bottom: 6px; }
  .next-topic strong { grid-column: 1; font: 400 27px/1.3 var(--serif); }
  .next-topic a > span:last-child { grid-column: 2; grid-row: 1 / 3; align-self: center; font-size: 28px; padding-left: 18px; }
  .guide-footer { padding: 30px 0; border-top: 1px solid var(--pine); }
  .guide-footer > p:first-child { max-width: 68ch; font-size: 16px; }
  .guide-footer nav { display: flex; flex-wrap: wrap; gap: 4px 22px; margin-top: 18px; }
  .guide-footer nav a { display: flex; align-items: center; min-height: 46px; min-width: 44px; font-size: 16px; padding: 10px 0; }
  .footer-domain { font: 16px/1.5 var(--mono); color: var(--quiet); margin-top: 22px; overflow-wrap: anywhere; }
}

@layer diagrams {
  .care-path { position: relative; padding: 26px 24px 22px; border: 1px solid var(--pine); background: var(--sheet); }
  .care-path::before, .care-path::after { content: ""; position: absolute; width: 13px; height: 13px; border: 1px solid var(--pine); background: var(--paper); }
  .care-path::before { top: -7px; right: -7px; }
  .care-path::after { bottom: -7px; left: -7px; }
  .care-path figcaption { font: 16px/1.5 var(--mono); color: var(--quiet); padding-bottom: 24px; border-bottom: 1px solid var(--rule); }
  .care-path ol { list-style: none; padding: 22px 0 0; }
  .care-path li { position: relative; padding: 0 0 28px 26px; border-left: 1px solid var(--rule); margin-left: 5px; }
  .care-path li:last-child { padding-bottom: 0; border-color: transparent; }
  .path-node { position: absolute; top: 7px; left: -6px; height: 11px; width: 11px; border: 1px solid var(--pine); background: var(--sheet); }
  .care-path strong { display: block; font-size: 18px; }
  .care-path li > span:last-child { display: block; font-size: 16px; line-height: 1.5; color: var(--quiet); margin-top: 4px; }
  .path-note { margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--rule); font-size: 16px; color: var(--quiet); }
  .bill-parts { max-width: 72ch; border: 1px solid var(--pine); padding: 24px; margin-top: 34px; background: var(--sheet); }
  .bill-parts figcaption { font: 16px/1.5 var(--mono); margin-bottom: 20px; }
  .bill-parts ul { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
  .bill-parts li { padding: 18px; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
  .bill-parts strong, .bill-parts span { display: block; font-size: 16px; }
  .bill-parts span { color: var(--quiet); margin-top: 6px; }
  .bill-parts > p { font-size: 16px; margin-top: 18px; }
  .study-comparison { border: 1px solid var(--rule); padding: 22px; background: var(--sheet); margin: 0 0 26px; }
  .study-comparison figcaption { font-size: 18px; line-height: 1.55; margin-bottom: 24px; }
  .study-track { margin-top: 16px; }
  .study-track > span { font-size: 16px; }
  .study-rule { height: 20px; margin-top: 8px; border-bottom: 1px solid var(--pine); border-left: 1px solid var(--pine); position: relative; }
  .study-rule > span { display: block; height: 14px; background: var(--pine); }
  .lira-study { width: 32%; }
  .sema-study { width: 79%; }
  .study-comparison > p { font-size: 16px; color: var(--quiet); margin-top: 22px; }
}

@layer controls {
  .claim-checks { border-top: 1px solid var(--pine); padding: 34px 0 38px; }
  .myth-controls { display: none; margin-bottom: 18px; }
  .myth-controls.has-myth-tools { display: block; }
  .myth-controls button { background: var(--sheet); border: 1px solid var(--pine); padding: 10px 16px; min-height: 46px; font-size: 16px; cursor: pointer; }
  .myth-reveal { border: 1px solid var(--rule); background: var(--sheet); margin-top: 14px; }
  .myth-reveal summary { display: grid; grid-template-columns: minmax(0, 1fr) 24px; align-items: center; gap: 8px 16px; padding: 20px; cursor: pointer; list-style: none; }
  .myth-reveal summary::-webkit-details-marker { display: none; }
  .myth-prompt { grid-column: 1; font-family: var(--serif); font-size: 25px; line-height: 1.3; }
  .myth-action { grid-column: 1; font: 16px/1.5 var(--mono); color: var(--pine); text-decoration: underline; text-underline-offset: .2em; }
  .myth-sign { grid-column: 2; grid-row: 1 / 3; font: 28px/1 var(--mono); }
  .myth-answer { border-top: 1px solid var(--rule); padding: 22px 20px 14px; }
  .myth-reveal[open] { border-color: var(--pine); }
  .myth-reveal[open] summary { background: var(--wash); }
  @media (prefers-reduced-motion: no-preference) {
    a, button { transition: background-color 120ms ease; }
  }
}

@layer responsive {
  @media (max-width: 1190px) {
    .guide-layout { grid-template-columns: 254px minmax(0, 1fr); }
    .guide-sheet { padding-inline: 34px; }
    .care-index { padding-inline: 18px; }
    .orientation-opening { grid-template-columns: 1fr; gap: 32px; }
    .orientation-opening h1 { max-width: 18ch; }
    .care-path { max-width: 620px; }
    .care-path ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
    .care-path li { padding-bottom: 0; }
  }
  @media (max-width: 800px) {
    .guide-layout { display: block; }
    .care-index { position: relative; max-height: none; overflow: visible; padding: 16px 22px 0; border-right: 0; border-bottom: 1px solid var(--pine); }
    .index-home { min-height: 44px; }
    .index-purpose { padding: 9px 0 17px 40px; }
    .index-purpose br { display: none; }
    .index-disclosure > summary { display: flex; justify-content: space-between; align-items: center; min-height: 48px; padding: 12px 0; border-top: 1px solid var(--rule); font: 16px/1.5 var(--mono); cursor: pointer; list-style: none; }
    .index-disclosure > summary::-webkit-details-marker { display: none; }
    .index-disclosure[open] > summary { border-bottom: 1px solid var(--rule); }
    .index-disclosure nav { padding-block: 10px; }
    .index-group { padding-block: 14px; border-top: 0; }
    .index-group a { min-height: 48px; padding-block: 12px; }
    .index-domain { display: none; }
    .guide-sheet { padding: 26px 24px 0; }
    .orientation-opening { padding-top: 13px; }
    .orientation-opening h1 { font-size: 47px; max-width: 13ch; }
    .guide-deck { font-size: 19px; }
    .reading-trail { margin-bottom: 24px; }
    .reading-trail ol, .reading-trail li { gap: 5px 12px; }
    .guide-intro { padding-top: 20px; }
    .guide-kicker { margin-bottom: 17px; }
    h1 { font-size: 40px; }
    .start-links { margin-top: 24px; }
    .start-link { font-size: 16px; padding-inline: 14px; }
    .care-path { padding: 24px 20px; }
    .care-path ol { display: block; }
    .care-path li { padding-bottom: 24px; }
    .reading-body { margin-top: 42px; }
    .care-idea, .claim-checks { padding: 29px 0 31px; }
    .claim-pair { padding-left: 15px; }
    .claim-source { font-size: 16px; }
    h2 { font-size: 29px; }
    .bill-parts { padding: 20px; }
    .bill-parts ul { grid-template-columns: 1fr; }
    .bill-parts li { padding: 16px; }
    .study-comparison { padding: 18px; }
    .myth-prompt { font-size: 24px; }
    .myth-reveal summary { padding: 18px; gap: 8px 10px; }
    .myth-answer { padding: 18px; }
    .next-topic { padding-bottom: 45px; }
    .next-topic > a { padding: 20px; }
    .next-topic strong { font-size: 25px; }
    .guide-footer nav { display: block; }
    .guide-footer nav a { width: fit-content; }
  }
  @media print {
    .guide-layout { display: block; }
    .care-index, .skip-reading, .start-links, .next-topic, .myth-controls, .guide-footer nav { display: none; }
    .guide-sheet { padding: 0; }
    .orientation-opening { grid-template-columns: 1fr; padding-top: 0; }
    .reading-body { max-width: none; }
    .care-idea, .claim-pair, figure { break-inside: avoid; }
    .myth-reveal::details-content { content-visibility: visible; }
  }
}