/* ============================================
   Soperai — about.css
   Complete redesign: a filing desk for AI paperwork.
   Signature: fanned index cards, folded corners,
   a stamped eyebrow tag, and a ledger of numbers.
   Loaded after style.css. Page owns its own tokens
   below so it never inherits the old palette.
   ============================================ */

   :root {
    --colorInk: #121815;
    --colorInk2: #1a2420;
    --colorPaper: #efe7d2;
    --colorPaper2: #e6dcc0;
    --colorPine: #3c5b45;
    --colorPineLight: #6a8a72;
    --colorOxblood: #8b3a2e;
    --colorMustard: #b98b3e;
    --colorLine: #2c3733;
    --colorLinePaper: #d8cda9;
    --colorTextInk: #ece7d8;
    --colorTextMuted: #93a093;
    --colorTextPaper: #1b231d;
    --colorTextPaperMuted: #5b6656;
    --fontDisplay: 'Zilla Slab', 'Georgia', serif;
    --fontMono: 'Special Elite', 'Courier New', monospace;
    --fontBody: 'IBM Plex Sans', 'Helvetica Neue', sans-serif;
  }
  
  /* ==== shared type marks ==== */
  .soperaiEyebrow {
    display: inline-block;
    padding: 5px 14px 4px;
    font-family: var(--fontMono);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--colorOxblood);
    background: var(--colorPaper);
    border: 1.5px solid var(--colorOxblood);
    transform: rotate(-1.5deg);
    margin-bottom: 18px;
  }
  .soperaiEyebrow.onPaper {
    color: var(--colorPine);
    border-color: var(--colorPine);
    background: transparent;
  }
  
  .soperaiDivider {
    width: 60px;
    height: 3px;
    margin: 0 auto 36px;
    background: var(--colorMustard);
  }
  
  .soperaiSectionHead {
    text-align: center;
    max-width: 620px;
    margin: 0 auto 46px;
  }
  .soperaiSectionTitle {
    font-family: var(--fontDisplay);
    font-size: clamp(1.7rem, 3.4vw, 2.5rem);
    font-weight: 600;
    line-height: 1.2;
    color: var(--colorTextPaper);
    margin-bottom: 14px;
  }
  .soperaiSectionSub {
    font-family: var(--fontBody);
    font-size: 14px;
    color: var(--colorTextPaperMuted);
    line-height: 1.7;
  }
  
  /* ==== breadcrumb ==== */
  .soperaiBreadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 18px 24px 0;
    font-family: var(--fontMono);
    font-size: 11px;
    color: var(--colorTextPaperMuted);
  }
  .soperaiBreadcrumb a { color: var(--colorPine); }
  .soperaiBreadcrumb span[aria-current] { color: var(--colorTextPaper); }
  
  /* ==== page rhythm: paper sections vs ink bookends ==== */
  .soperaiSection {
    padding: 68px 24px;
    background: var(--colorPaper);
  }
  .soperaiSection.onPaper2 { background: var(--colorPaper2); }
  
  /* ==== hero (ink bookend) ==== */
  .soperaiHero {
    background: var(--colorInk);
    padding: 64px 24px 56px;
  }
  .soperaiHeroInner {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: center;
  }
  .soperaiHero .soperaiEyebrow {
    color: var(--colorMustard);
    border-color: var(--colorMustard);
    background: transparent;
  }
  .soperaiHeroTitle {
    font-family: var(--fontDisplay);
    font-size: clamp(2.1rem, 4.6vw, 3.4rem);
    font-weight: 600;
    line-height: 1.16;
    color: var(--colorTextInk);
    margin-bottom: 20px;
  }
  .soperaiHeroTitle .accent { color: var(--colorPineLight); }
  .soperaiHeroSub {
    font-family: var(--fontBody);
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
    color: var(--colorTextMuted);
    line-height: 1.75;
    max-width: 480px;
    margin: 0 0 32px;
  }
  .soperaiHeroCta { display: flex; gap: 14px; flex-wrap: wrap; }
  
  .soperaiBtnPrimary {
    display: inline-block;
    padding: 13px 30px;
    font-family: var(--fontMono);
    font-size: 12.5px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--colorInk);
    background: var(--colorMustard);
    border: none;
    transition: transform 0.2s ease, background 0.2s ease;
  }
  .soperaiBtnPrimary:hover { background: var(--colorPineLight); transform: translateY(2px); }
  
  .soperaiBtnGhost {
    display: inline-block;
    padding: 12px 28px;
    font-family: var(--fontMono);
    font-size: 12.5px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--colorTextInk);
    background: transparent;
    border: 1.5px solid var(--colorLine);
    transition: border 0.2s ease, transform 0.2s ease;
  }
  .soperaiBtnGhost:hover { border-color: var(--colorTextInk); transform: translateY(2px); }
  
  /* ==== hero visual: a fanned stack of index cards, one per tool ==== */
  .soperaiCardStack {
    position: relative;
    height: 340px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .soperaiStackCard {
    position: absolute;
    width: 190px;
    padding: 20px 18px;
    background: var(--colorPaper);
    border: 1.5px solid var(--colorLinePaper);
    font-family: var(--fontBody);
    clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  }
  .soperaiStackCard .tag {
    display: block;
    font-family: var(--fontMono);
    font-size: 10px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 8px;
  }
  .soperaiStackCard .name {
    font-family: var(--fontDisplay);
    font-size: 17px;
    color: var(--colorTextPaper);
  }
  .soperaiStackCard.card1 { transform: rotate(9deg) translate(46px, 18px); z-index: 1; }
  .soperaiStackCard.card2 { transform: rotate(3deg) translate(18px, 6px); z-index: 2; }
  .soperaiStackCard.card3 { transform: rotate(-4deg) translate(-14px, 4px); z-index: 3; }
  .soperaiStackCard.card4 { transform: rotate(-10deg) translate(-44px, 20px); z-index: 4; }
  .soperaiStackCard.card1 .tag { color: var(--colorOxblood); }
  .soperaiStackCard.card2 .tag { color: var(--colorMustard); }
  .soperaiStackCard.card3 .tag { color: var(--colorPine); }
  .soperaiStackCard.card4 .tag { color: var(--colorOxblood); }
  
  /* ==== ledger strip (stats, as a receipt of figures) ==== */
  .soperaiLedger {
    max-width: 1020px;
    margin: 48px auto 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1.5px solid var(--colorLine);
    border-bottom: 1.5px solid var(--colorLine);
  }
  .soperaiLedgerItem {
    padding: 22px 14px;
    text-align: center;
    border-left: 1px solid var(--colorLine);
  }
  .soperaiLedgerItem:first-child { border-left: none; }
  .soperaiLedgerNum {
    font-family: var(--fontDisplay);
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    color: var(--colorMustard);
    line-height: 1;
    margin-bottom: 8px;
  }
  .soperaiLedgerLabel {
    font-family: var(--fontMono);
    font-size: 10px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--colorTextMuted);
  }
  
  /* ==== tool cards (the five folders) ==== */
  .soperaiToolsGrid {
    max-width: 1080px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
  .soperaiToolCard {
    display: block;
    padding: 26px 20px;
    background: var(--colorPaper2);
    border: 1.5px solid var(--colorLinePaper);
    clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
    transition: transform 0.2s ease, border 0.2s ease;
  }
  .soperaiToolCard:hover { transform: translateY(4px); border-color: var(--colorPine); }
  .soperaiToolCard .tag {
    display: inline-block;
    font-family: var(--fontMono);
    font-size: 10px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 12px;
    color: var(--colorOxblood);
  }
  .soperaiToolCard:nth-child(2) .tag { color: var(--colorMustard); }
  .soperaiToolCard:nth-child(3) .tag { color: var(--colorPine); }
  .soperaiToolCard:nth-child(4) .tag { color: var(--colorOxblood); }
  .soperaiToolCard h3 {
    font-family: var(--fontDisplay);
    font-size: 18px;
    color: var(--colorTextPaper);
    margin-bottom: 8px;
  }
  .soperaiToolCard p {
    font-family: var(--fontBody);
    font-size: 12.5px;
    color: var(--colorTextPaperMuted);
    line-height: 1.6;
  }
  .soperaiToolsNote {
    max-width: 1080px;
    margin: 26px auto 0;
    font-family: var(--fontBody);
    font-size: 13px;
    color: var(--colorTextPaperMuted);
    text-align: center;
    line-height: 1.8;
  }
  .soperaiToolsNote a { color: var(--colorPine); border-bottom: 1px solid var(--colorPine); }
  
  /* ==== story (case file) ==== */
  .soperaiStoryGrid {
    max-width: 1080px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
  }
  .soperaiStoryCopy p {
    font-family: var(--fontBody);
    font-size: 14px;
    color: var(--colorTextPaperMuted);
    line-height: 1.85;
    margin-bottom: 16px;
  }
  .soperaiStoryCopy strong { color: var(--colorTextPaper); }
  
  .soperaiTimeline { display: flex; flex-direction: column; gap: 22px; }
  .soperaiTimelineItem {
    padding: 18px 20px;
    background: var(--colorPaper2);
    border-left: 3px solid var(--colorPine);
  }
  .soperaiTimelineFile {
    font-family: var(--fontMono);
    font-size: 11px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--colorOxblood);
    margin-bottom: 6px;
  }
  .soperaiTimelineTitle {
    font-family: var(--fontDisplay);
    font-size: 16px;
    color: var(--colorTextPaper);
    margin-bottom: 6px;
  }
  .soperaiTimelineDesc {
    font-family: var(--fontBody);
    font-size: 12.5px;
    color: var(--colorTextPaperMuted);
    line-height: 1.7;
  }
  
  /* ==== purpose (mission / vision, two stamped sheets) ==== */
  .soperaiPurposeGrid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .soperaiPurposeCard {
    padding: 32px 28px;
    background: var(--colorPaper);
    border: 1.5px solid var(--colorLinePaper);
  }
  .soperaiPurposeCard.tiltLeft { transform: rotate(1deg); }
  .soperaiPurposeCard.tiltRight { transform: rotate(1deg); }
  .soperaiPurposeCard .stamp {
    display: inline-block;
    font-family: var(--fontMono);
    font-size: 11px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--colorOxblood);
    border: 1.5px solid var(--colorOxblood);
    padding: 4px 10px;
    margin-bottom: 14px;
  }
  .soperaiPurposeCard h3 {
    font-family: var(--fontDisplay);
    font-size: 19px;
    color: var(--colorTextPaper);
    margin-bottom: 12px;
  }
  .soperaiPurposeCard p {
    font-family: var(--fontBody);
    font-size: 13.5px;
    color: var(--colorTextPaperMuted);
    line-height: 1.8;
  }
  
  /* ==== values (four cards) ==== */
  .soperaiValuesGrid {
    max-width: 1080px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
  .soperaiValueCard {
    padding: 24px 20px;
    background: var(--colorPaper);
    border-top: 3px solid var(--colorPine);
  }
  .soperaiValueCard:nth-child(2) { border-top-color: var(--colorMustard); }
  .soperaiValueCard:nth-child(3) { border-top-color: var(--colorOxblood); }
  .soperaiValueCard:nth-child(4) { border-top-color: var(--colorPineLight); }
  .soperaiValueCard h3 {
    font-family: var(--fontDisplay);
    font-size: 16px;
    color: var(--colorTextPaper);
    margin-bottom: 8px;
  }
  .soperaiValueCard p {
    font-family: var(--fontBody);
    font-size: 12.5px;
    color: var(--colorTextPaperMuted);
    line-height: 1.7;
  }
  
  /* ==== why (feature list, no marks other than a rule) ==== */
  .soperaiWhyGrid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }
  .soperaiWhyList { display: flex; flex-direction: column; }
  .soperaiWhyItem {
    padding: 18px 0;
    border-bottom: 1px solid var(--colorLinePaper);
  }
  .soperaiWhyItem:first-child { padding-top: 0; }
  .soperaiWhyItem h4 {
    font-family: var(--fontDisplay);
    font-size: 15px;
    color: var(--colorTextPaper);
    margin-bottom: 5px;
  }
  .soperaiWhyItem p {
    font-family: var(--fontBody);
    font-size: 12.5px;
    color: var(--colorTextPaperMuted);
    line-height: 1.7;
  }
  .soperaiWhyVisual {
    padding: 34px 26px;
    background: var(--colorInk);
  }
  .soperaiWhyVisual .stamp {
    display: inline-block;
    font-family: var(--fontMono);
    font-size: 11px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--colorMustard);
    border: 1.5px solid var(--colorMustard);
    padding: 5px 12px;
    margin-bottom: 18px;
  }
  .soperaiWhyVisual h3 {
    font-family: var(--fontDisplay);
    font-size: 20px;
    color: var(--colorTextInk);
    line-height: 1.3;
  }
  
  /* ==== faq (ledger of questions) ==== */
  .soperaiFaq {
    max-width: 720px;
    margin: 0 auto;
  }
  .soperaiFaqItem {
    border-bottom: 1px solid var(--colorLinePaper);
  }
  .soperaiFaqItem summary {
    padding: 18px 4px;
    font-family: var(--fontDisplay);
    font-size: 15px;
    color: var(--colorTextPaper);
    cursor: pointer;
  }
  .soperaiFaqItem[open] summary { color: var(--colorPine); }
  .soperaiFaqAnswer {
    padding: 0 4px 20px;
    font-family: var(--fontBody);
    font-size: 13px;
    color: var(--colorTextPaperMuted);
    line-height: 1.8;
  }
  
  /* ==== closing stub (ink bookend, ticket look) ==== */
  .soperaiCta {
    background: var(--colorInk);
    padding: 68px 24px;
  }
  .soperaiCtaInner {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
    padding: 40px 32px;
    border: 2px dashed var(--colorLine);
  }
  .soperaiCtaInner h2 {
    font-family: var(--fontDisplay);
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--colorTextInk);
    margin-bottom: 12px;
  }
  .soperaiCtaInner p {
    font-family: var(--fontBody);
    font-size: 13.5px;
    color: var(--colorTextMuted);
    max-width: 440px;
    margin: 0 auto 26px;
    line-height: 1.75;
  }
  .soperaiCtaCta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
  
  /* ==== responsive ==== */
  @media (max-width: 980px) {
    .soperaiHeroInner { grid-template-columns: 1fr; text-align: center; }
    .soperaiHeroSub { margin: 0 auto 32px; }
    .soperaiHeroCta { justify-content: center; }
    .soperaiCardStack { order: -1; margin-bottom: 20px; }
    .soperaiLedger { grid-template-columns: repeat(2, 1fr); }
    .soperaiLedgerItem:nth-child(3) { border-left: none; }
    .soperaiToolsGrid { grid-template-columns: repeat(2, 1fr); }
    .soperaiStoryGrid, .soperaiPurposeGrid, .soperaiWhyGrid { grid-template-columns: 1fr; gap: 32px; }
    .soperaiValuesGrid { grid-template-columns: repeat(2, 1fr); }
    .soperaiWhyVisual { order: -1; }
  }
  @media (max-width: 560px) {
    .soperaiToolsGrid, .soperaiValuesGrid, .soperaiLedger { grid-template-columns: 1fr; }
    .soperaiLedgerItem { border-left: none; border-top: 1px solid var(--colorLine); }
    .soperaiLedgerItem:first-child { border-top: none; }
    .soperaiHero { padding: 48px 18px 44px; }
    .soperaiSection { padding: 48px 18px; }
    .soperaiCtaInner { padding: 32px 20px; }
    .soperaiBreadcrumb { padding: 16px 18px 0; }
  }