/* Clearstory Platform website styles.
   A modular grid drawn in hairlines. Headings sit on green strips at the top of
   tiles; body copy stays on white or pale green. Colours are the brand palette
   only; change them here, in :root, and nowhere else. */
  :root {
    --paper: #ffffff;
    --green: #1e4d43;
    --green-dark: #163a33;
    --green-pale: #e8f0ed;
    --slate: #333d47;
    --slate-tint: #5b6671;
    --hairline: #d9dee3;
    --lemon: #f4db5b;
    --green-mid: #c6d9d1;     /* derived: the middle step of the home page diagram. Green text on it reads 6.5:1 */

    --serif: Georgia, "Times New Roman", serif;
    --sans: "IBM Plex Sans", Arial, sans-serif;
    --mono: "IBM Plex Mono", "Courier New", monospace;

    --gutter: clamp(16px, 3vw, 40px);
    --pad: clamp(20px, 2.6vw, 36px);
    --max: 1280px;
  }
  * { box-sizing: border-box; }
  body { margin: 0; background: var(--paper); color: var(--slate); font: 400 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
  a { color: var(--green); }
  a:hover { color: var(--green-dark); }
  :focus-visible { outline: 2px solid var(--green-dark); outline-offset: 2px; }
  .on-green :focus-visible { outline-color: var(--paper); }
  mark { background: var(--lemon); color: var(--slate); padding: 0 3px; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
  p { margin: 0 0 12px; }
  p:last-child { margin-bottom: 0; }
  .gap { font: 400 14px/1 var(--mono); color: var(--green); background: var(--green-pale); padding: 2px 5px; }
  .wrap { max-width: var(--max); margin: 0 auto; padding-inline: var(--gutter); }
  .label { font: 500 12px/1.2 var(--sans); letter-spacing: 0.12em; text-transform: uppercase; color: var(--green); margin: 0 0 14px; }
  .on-green .label { color: var(--green-pale); }

  /* Header */
  .head { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--paper); border-bottom: 1px solid var(--hairline); }
  .head .wrap { display: flex; align-items: center; gap: 28px; padding-block: 12px; flex-wrap: wrap; }
  .logo img { width: 196px; height: auto; display: block; }
  .nav { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
  .nav a { font: 500 14px/1.2 var(--sans); color: var(--slate); text-decoration: none; padding: 10px 14px; border-radius: 2px; }
  .nav a:hover { background: var(--green-pale); color: var(--green); }
  .nav a[aria-current="page"] { background: var(--green-pale); color: var(--green); }
  .head .btn { padding: 10px 16px; font-size: 15px; }

  /* The grid: tiles separated by 1px hairlines */
  .grid {
    display: grid; grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 1px; background: var(--hairline);
    border: 1px solid var(--hairline);
  }
  .grid + .grid { border-top: 0; }
  .tile { background: var(--paper); padding: var(--pad); min-width: 0; }
  .tile.pale { background: var(--green-pale); }
  .tile.flush { padding: 0; display: flex; flex-direction: column; }
  .s12 { grid-column: span 12; } .s8 { grid-column: span 8; } .s7 { grid-column: span 7; }
  .s6 { grid-column: span 6; } .s5 { grid-column: span 5; } .s4 { grid-column: span 4; }

  /* A heading strip: green band at the top of a tile, heading only */
  .strip { background: var(--green); color: var(--paper); padding: calc(var(--pad) * 0.8) var(--pad); }
  .strip h2, .strip h3 { font-family: var(--serif); font-weight: 400; color: var(--paper); margin: 0; text-wrap: balance; }
  .strip h2 { font-size: clamp(24px, 2.6vw, 34px); line-height: 1.12; }
  .strip h3 { font-size: clamp(24px, 2.4vw, 30px); line-height: 1.12; }
  .tile-body { padding: var(--pad); flex: 1; display: flex; flex-direction: column; }

  /* Type */
  .display { font: 400 clamp(38px, 5.6vw, 76px)/1.02 var(--serif); letter-spacing: -0.012em; color: var(--green); margin: 0 0 28px; text-wrap: balance; max-width: 15ch; }
  .title { font: 400 clamp(34px, 4.4vw, 58px)/1.05 var(--serif); color: var(--green); margin: 0 0 24px; text-wrap: balance; max-width: 18ch; }
  .lead { font-size: clamp(19px, 1.6vw, 21px); line-height: 1.55; max-width: 40ch; }
  .h-sec { font: 400 clamp(26px, 2.8vw, 36px)/1.1 var(--serif); color: var(--green); margin: 0 0 20px; }
  .statement { font: 400 clamp(24px, 2.8vw, 36px)/1.3 var(--serif); color: var(--slate); margin: 0; max-width: 36ch; }

  main { padding-block: var(--gutter) clamp(48px, 6vw, 80px); }

  /* Buttons */
  .btn { font: 500 17px/1.2 var(--sans); text-decoration: none; padding: 15px 24px; border-radius: 2px; border: 1px solid transparent; display: inline-block; }
  .btn-primary { background: var(--green); color: var(--paper); }
  .btn-primary:hover { background: var(--green-dark); color: var(--paper); }
  .btn-secondary { background: var(--paper); color: var(--green); border-color: var(--green); }
  .btn-secondary:hover { background: var(--green-pale); }
  .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }


  /* Offer tiles on home */
  .offer-tile { text-decoration: none; color: var(--slate); transition: background .2s; }
  .offer-tile .strip { transition: background .2s; }
  .offer-tile:hover .strip { background: var(--green-dark); }
  .offer-tile:hover .tile-body { background: var(--green-pale); }
  .offer-tile .more { margin-top: auto; padding-top: 20px; font: 500 15px/1 var(--sans); color: var(--green); text-decoration: underline; }

  /* Offer page: main column plus pinned scope panel */
  .offer-grid { display: grid; grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); }
  .offer-main { background: var(--paper); display: grid; gap: 1px; background: var(--hairline); align-content: start; }
  .offer-main > .tile p { max-width: 66ch; }
  .aside { background: var(--paper); }
  .pin { position: sticky; top: 84px; }
  .pin .strip h2 { font-size: clamp(22px, 2vw, 28px); }
  .scope { list-style: none; margin: 0; padding: 0; }
  .scope li { padding: 16px 0; border-bottom: 1px solid var(--hairline); }
  .scope li:first-child { padding-top: 0; }
  .scope strong { display: block; font: 500 17px/1.35 var(--sans); color: var(--slate); }
  .scope span { display: block; font-size: 15px; line-height: 1.45; color: var(--slate-tint); margin-top: 4px; }
  .pin .note { font-size: 15px; color: var(--slate-tint); margin-top: 16px; }
  .first { background: var(--green-pale); padding: 18px 20px; margin-top: 20px; }
  .first p { font-size: 15px; line-height: 1.5; }
  .pin .btn { width: 100%; text-align: center; margin-top: 20px; }

  .fit { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--hairline); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--hairline); }
  .fit li { background: var(--paper); padding: 22px var(--pad) 26px 0; font-size: 17px; }
  .fit li:nth-child(even) { padding-left: var(--pad); padding-right: 0; }
  .fit li::before { content: ""; display: block; width: 8px; height: 8px; background: var(--green); margin-bottom: 12px; }
  .fit-tile { padding-bottom: 0; }

  .also { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); border-top: 0; }
  .also a { background: var(--paper); padding: var(--pad); text-decoration: none; display: flex; justify-content: space-between; align-items: baseline; gap: 16px; }
  .also a:hover { background: var(--green-pale); }
  .also .n { font: 400 clamp(22px, 2.4vw, 30px)/1.1 var(--serif); color: var(--green); }
  .also .r { font: 500 15px/1 var(--sans); color: var(--green); text-decoration: underline; white-space: nowrap; }

  /* Legal */
  .notice { background: var(--green); border: 1px solid var(--green); padding: calc(var(--pad) * 0.8) var(--pad); margin-bottom: var(--gutter); }
  .notice p { font: 400 clamp(20px, 2vw, 26px)/1.3 var(--serif); color: var(--paper); margin: 0; max-width: 48ch; }
  .legal h3 { font: 400 clamp(23px, 2.4vw, 28px)/1.15 var(--serif); color: var(--green); margin: 0 0 14px; }
  .legal h4 { font: 500 17px/1.4 var(--sans); color: var(--slate); margin: 18px 0 6px; }
  .legal-meta { font-size: 15px; color: var(--slate-tint); }
  .toc { list-style: none; margin: 0; padding: 0; }
  .toc a { display: block; padding: 9px 0; border-bottom: 1px solid var(--hairline); font: 500 14px/1.35 var(--sans); color: var(--slate); text-decoration: none; }
  .toc a:hover { color: var(--green); }
  .toc .num { font: 400 13px var(--mono); color: var(--green); margin-right: 10px; }
  .clause-num { font: 400 13px/1 var(--mono); color: var(--green); display: block; margin-bottom: 10px; letter-spacing: 0.04em; }
  .tbl { overflow-x: auto; }
  table { border-collapse: collapse; width: 100%; min-width: 440px; }
  th { background: var(--green); color: var(--paper); font: 500 15px/1.3 var(--sans); text-align: left; padding: 10px 16px; }
  td { border-bottom: 1px solid var(--hairline); padding: 12px 16px; font-size: 15px; vertical-align: top; }
  [id^="s"], [id^="c"] { scroll-margin-top: 90px; }

  /* Footer */
  .foot .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding-block: 28px 48px; border-top: 1px solid var(--hairline); }
  .foot p { margin: 0; font-size: 15px; color: var(--slate-tint); }
  .foot nav { display: flex; gap: 24px; }
  .foot a { font-size: 15px; }

  @media (max-width: 960px) {
    .s8, .s7, .s6, .s5, .s4 { grid-column: span 12; }
    .offer-grid { grid-template-columns: 1fr; }
    .pin { position: static; }
    .aside { order: -1; }
    .offer-grid > .offer-main { order: 0; }
  }
  @media (max-width: 640px) {
    .fit, .also { grid-template-columns: 1fr; }
    .fit li, .fit li:nth-child(even) { padding: 18px 0 22px; }
    .logo img { width: 150px; }
    .head .btn { display: none; }
    .nav { margin-left: 0; width: 100%; }
    .nav a { padding: 8px 10px; }
  }
  @media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

  /* Relationship diagram (home page): boxes joined by labelled arrows */
  .relation { margin: 0; }
  .relation-head { font: 500 12px/1.2 var(--sans); letter-spacing: 0.12em; text-transform: uppercase; color: var(--green); margin: 0 0 18px; }
  .relation .step { background: var(--paper); border: 1px solid var(--slate-tint); padding: 16px 20px; }
  .relation .step h3 { font: 400 clamp(22px, 2vw, 26px)/1.15 var(--serif); color: var(--green); margin: 0 0 4px; }
  .relation .step p { font-size: 15px; line-height: 1.5; color: var(--slate); margin: 0; }
  .relation .step.mid { background: var(--green-mid); border-color: var(--green-mid); }
  .relation .step.dark { background: var(--green); border-color: var(--green); }
  .relation .step.dark h3 { color: var(--paper); }
  .relation .step.dark p { color: var(--green-pale); }
  .relation .rel { position: relative; min-height: 52px; padding: 14px 0 14px 48px; display: flex; align-items: center; }
  .relation .rel::before { content: ""; position: absolute; left: 32px; top: 0; bottom: 7px; width: 1px; background: var(--slate-tint); }
  .relation .rel::after { content: ""; position: absolute; left: 28px; bottom: 0; border-left: 4.5px solid transparent; border-right: 4.5px solid transparent; border-top: 7px solid var(--slate-tint); }
  .relation .rel span { font: italic 400 15px/1.3 var(--sans); color: var(--slate-tint); }
  .relation-note { font-size: 15px; line-height: 1.5; color: var(--slate); margin: 20px 0 0; }

  .source { font: italic 400 14px/1.45 var(--sans); color: var(--slate-tint); margin-top: 16px; max-width: 70ch; }

  /* Oakfield card, with its "fictional" stamp */
  .oak { position: relative; }
  .oak h3 { font: 400 clamp(26px, 2.6vw, 34px)/1.1 var(--serif); color: var(--green); margin: 0 0 20px; padding-right: 120px; }
  .oak dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 10px 18px; font-size: 16px; }
  .oak dt { font: 500 12px/1.9 var(--sans); letter-spacing: 0.1em; text-transform: uppercase; color: var(--slate-tint); }
  .oak dd { margin: 0; color: var(--slate); }
  .stamp {
    position: absolute; top: calc(var(--pad) - 4px); right: var(--pad);
    transform: rotate(-7deg);
    font: 500 13px/1 var(--sans); letter-spacing: 0.22em; text-transform: uppercase;
    color: var(--green); padding: 8px 10px 8px 13px;
    border: 2px solid var(--green); outline: 1px solid var(--green); outline-offset: 3px;
    border-radius: 2px;
  }
  .visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  @media (max-width: 420px) {
    .oak h3 { padding-right: 0; padding-top: 44px; }
    .oak dl { grid-template-columns: 1fr; gap: 2px; }
    .oak dd { margin-bottom: 10px; }
  }

  .close-note { font-size: 15px; line-height: 1.5; color: var(--slate-tint); margin: 10px 0 0; max-width: 46ch; }

  /* Further-reading tile on offer pages: the whole tile is the link */
  .article-tile { display: block; text-decoration: none; color: var(--slate); transition: background .2s; }
  .article-tile:hover { background: var(--green-mid); }
  .article-tile p { max-width: 60ch; }
  .article-tile .more { display: inline-block; margin-top: 14px; font: 500 15px/1 var(--sans); color: var(--green); text-decoration: underline; }

  /* The closing invitation sits flush under whatever comes before it */
  .also + .close-grid { border-top: 0; }