/* ---------- tokens: light is the base ---------- */
  :root {
    --paper:      #F3F5EE;
    --surface:    #FBFCF7;
    --stripe:     rgba(20,28,24,0.035);
    --ink:        #141C18;
    --ink-2:      #4A564E;
    --ink-3:      #6E7A71;
    --rule:       #CFD8C9;
    --rule-soft:  #E1E7DC;
    --accent:     #7B2E45;
    --accent-ink: #7B2E45;
    --accent-bg:  rgba(123,46,69,0.08);
    --ok:         #2C6E5B;
    --ok-bg:      rgba(44,110,91,0.10);
    --warn:       #8A6A18;
    --warn-bg:    rgba(138,106,24,0.12);
    --focus:      #7B2E45;

    --f-display: "Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua","Times New Roman",Georgia,serif;
    --f-body: -apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Helvetica,Arial,sans-serif;
    --f-mono: ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

    --measure: 66ch;
    --gutter: 11.5rem;
  }
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --paper:      #0F1512;
      --surface:    #161E1A;
      --stripe:     rgba(230,235,227,0.035);
      --ink:        #E6EBE3;
      --ink-2:      #A3AFA5;
      --ink-3:      #808D84;
      --rule:       #2A342D;
      --rule-soft:  #222B25;
      --accent:     #D98CA2;
      --accent-ink: #E9A9BB;
      --accent-bg:  rgba(217,140,162,0.12);
      --ok:         #6FB89F;
      --ok-bg:      rgba(111,184,159,0.13);
      --warn:       #C2A24E;
      --warn-bg:    rgba(194,162,78,0.14);
      --focus:      #E9A9BB;
    }
  }
  :root[data-theme="dark"] {
    --paper:      #0F1512;
    --surface:    #161E1A;
    --stripe:     rgba(230,235,227,0.035);
    --ink:        #E6EBE3;
    --ink-2:      #A3AFA5;
    --ink-3:      #808D84;
    --rule:       #2A342D;
    --rule-soft:  #222B25;
    --accent:     #D98CA2;
    --accent-ink: #E9A9BB;
    --accent-bg:  rgba(217,140,162,0.12);
    --ok:         #6FB89F;
    --ok-bg:      rgba(111,184,159,0.13);
    --warn:       #C2A24E;
    --warn-bg:    rgba(194,162,78,0.14);
    --focus:      #E9A9BB;
  }

  /* ---------- base ---------- */
  * { box-sizing: border-box; }
  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--f-body);
    font-size: 16.5px;
    line-height: 1.62;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
  a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
  a:focus-visible, button:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
    border-radius: 1px;
  }
  h1, h2, h3 { font-family: var(--f-display); font-weight: 600; text-wrap: balance; margin: 0; }
  p { margin: 0; }
  strong { font-weight: 600; color: var(--ink); }
  code, .mono { font-family: var(--f-mono); }

  .wrap { max-width: 62rem; margin: 0 auto; padding: 0 1.75rem; }
  .prose { max-width: var(--measure); display: flex; flex-direction: column; gap: 1.05rem; }
  .prose p { color: var(--ink-2); }

  .eyebrow {
    font-family: var(--f-mono);
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-3);
  }

  /* ---------- masthead ---------- */
  header.top {
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
  }
  .top-in {
    display: flex; align-items: baseline; justify-content: space-between;
    gap: 1.5rem; flex-wrap: wrap;
    padding: 1.15rem 1.75rem;
    max-width: 62rem; margin: 0 auto;
  }
  .wordmark {
    font-family: var(--f-mono);
    font-size: 0.9rem;
    letter-spacing: 0.34em;
    text-transform: uppercase;
    font-weight: 600;
  }
  .wordmark .dot { color: var(--accent); }
  .top-meta { display: flex; align-items: baseline; gap: 1.25rem; flex-wrap: wrap; }
  .beta {
    font-family: var(--f-mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-ink);
    background: var(--accent-bg);
    border: 1px solid var(--accent);
    padding: 0.2rem 0.55rem;
  }
  .top-link { font-family: var(--f-mono); font-size: 0.78rem; }

  /* ---------- hero ---------- */
  .hero { padding: 4.5rem 0 3.25rem; }
  .hero h1 {
    font-size: clamp(2.1rem, 5.4vw, 3.35rem);
    line-height: 1.06;
    letter-spacing: -0.018em;
    margin: 1rem 0 1.5rem;
    max-width: 30ch;
  }
  .hero h1 em { font-style: italic; color: var(--accent-ink); }
  .lede { font-size: 1.09rem; }
  .lede.first { color: var(--ink); }

  /* ---------- record block ---------- */
  .record {
    margin-top: 2.75rem;
    border: 1px solid var(--rule);
    background: var(--surface);
    max-width: 46rem;
  }
  .record-head {
    display: flex; justify-content: space-between; align-items: baseline;
    gap: 1rem; flex-wrap: wrap;
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--rule);
    font-family: var(--f-mono);
    font-size: 0.68rem;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    color: var(--ink-3);
  }
  .fields { overflow-x: auto; }
  .fields table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--f-mono);
    font-size: 0.815rem;
    font-variant-numeric: tabular-nums;
  }
  .fields tr:nth-child(odd) { background: var(--stripe); }
  .fields th {
    text-align: left;
    font-weight: 400;
    color: var(--ink-3);
    white-space: nowrap;
    padding: 0.42rem 1rem;
    width: 12.5rem;
    letter-spacing: 0.04em;
  }
  .fields td { padding: 0.42rem 1rem; color: var(--ink); }
  .state {
    display: inline-block;
    padding: 0.02rem 0.4rem;
    border: 1px solid currentColor;
    font-size: 0.74rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
  .state.ok   { color: var(--ok);   background: var(--ok-bg); }
  .state.warn { color: var(--warn); background: var(--warn-bg); }
  .record-foot {
    border-top: 1px solid var(--rule);
    padding: 0.7rem 1rem;
    font-family: var(--f-mono);
    font-size: 0.72rem;
    color: var(--ink-3);
    line-height: 1.5;
  }

  /* ---------- sections ---------- */
  .sec {
    border-top: 1px solid var(--rule);
    padding: 3.25rem 0;
    display: grid;
    grid-template-columns: var(--gutter) minmax(0, 1fr);
    gap: 0 3rem;
  }
  .sec > .label { padding-top: 0.35rem; }
  .sec > .label span { display: block; }
  .sec > .label .n {
    font-family: var(--f-mono);
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-3);
  }
  .sec-body { display: flex; flex-direction: column; gap: 1.6rem; min-width: 0; }
  .sec h2 {
    font-size: clamp(1.35rem, 2.8vw, 1.75rem);
    line-height: 1.18;
    letter-spacing: -0.012em;
    max-width: 28ch;
  }
  .sec h3 {
    font-size: 1.02rem;
    font-family: var(--f-body);
    font-weight: 650;
    letter-spacing: -0.005em;
  }
  @media (max-width: 44rem) {
    .sec { grid-template-columns: 1fr; gap: 1.1rem; }
    .sec > .label { padding-top: 0; }
  }

  /* ---------- dispute walkthrough ---------- */
  .knows { overflow-x: auto; }
  .knows table {
    width: 100%;
    min-width: 34rem;
    border-collapse: collapse;
    text-align: left;
  }
  .knows caption {
    caption-side: top;
    text-align: left;
    font-family: var(--f-mono);
    font-size: 0.68rem;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    color: var(--ink-3);
    padding-bottom: 0.6rem;
  }
  .knows th[scope="col"] {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 500;
    color: var(--ink);
    border-bottom: 1px solid var(--rule);
    padding: 0 0.9rem 0.5rem;
    vertical-align: bottom;
  }
  .knows th[scope="row"] {
    font-family: var(--f-mono);
    font-size: 0.76rem;
    font-weight: 400;
    color: var(--ink-3);
    padding: 0.75rem 0.9rem 0.75rem 0;
    border-bottom: 1px solid var(--rule-soft);
    vertical-align: top;
    white-space: nowrap;
  }
  .knows td {
    font-size: 0.93rem;
    color: var(--ink-2);
    padding: 0.75rem 0.9rem;
    border-bottom: 1px solid var(--rule-soft);
    vertical-align: top;
  }
  .knows td.mb { color: var(--ink); background: var(--accent-bg); }
  .knows tr:last-child th, .knows tr:last-child td { border-bottom: 0; }

  .steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 1.1rem; counter-reset: s; }
  .steps li {
    counter-increment: s;
    display: grid;
    grid-template-columns: 2.4rem minmax(0,1fr);
    gap: 0 0.9rem;
    max-width: calc(var(--measure) + 3rem);
  }
  .steps li::before {
    content: counter(s, decimal-leading-zero);
    font-family: var(--f-mono);
    font-size: 0.74rem;
    color: var(--accent-ink);
    padding-top: 0.28rem;
    letter-spacing: 0.05em;
  }
  .steps p { color: var(--ink-2); }

  /* ---------- mechanics grid ---------- */
  .mech { display: grid; grid-template-columns: repeat(auto-fit, minmax(15.5rem, 1fr)); gap: 0; border-top: 1px solid var(--rule-soft); }
  .mech > div {
    padding: 1.15rem 1.4rem 1.3rem 0;
    border-bottom: 1px solid var(--rule-soft);
    display: flex; flex-direction: column; gap: 0.4rem;
  }
  .mech dt {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-3);
  }
  .mech dd { margin: 0; font-size: 0.94rem; color: var(--ink-2); }
  .mech dd b { color: var(--ink); font-weight: 600; }

  /* ---------- plain claim list ---------- */
  .claims { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.75rem; max-width: var(--measure); }
  .claims li {
    display: grid; grid-template-columns: 1.5rem minmax(0,1fr); gap: 0 0.5rem;
    font-size: 0.95rem; color: var(--ink-2);
  }
  .claims li::before { content: "—"; color: var(--ink-3); font-family: var(--f-mono); }

  /* ---------- cta ---------- */
  .cta { border-top: 1px solid var(--rule); padding: 3.5rem 0 4rem; }
  .cta-in { display: flex; flex-direction: column; gap: 1.4rem; max-width: var(--measure); }
  .cta h2 { font-size: clamp(1.5rem, 3.2vw, 2rem); letter-spacing: -0.015em; }
  .btn {
    align-self: flex-start;
    font-family: var(--f-mono);
    font-size: 0.82rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--paper);
    background: var(--accent);
    border: 1px solid var(--accent);
    padding: 0.72rem 1.3rem;
    text-decoration: none;
    transition: background 140ms ease, color 140ms ease;
  }
  .btn:hover { background: transparent; color: var(--accent-ink); }
  .cta-note { font-family: var(--f-mono); font-size: 0.76rem; color: var(--ink-3); line-height: 1.6; }

  footer.foot {
    border-top: 1px solid var(--rule);
    padding: 1.5rem 0 3rem;
  }
  .foot-in {
    display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
    font-family: var(--f-mono); font-size: 0.72rem; color: var(--ink-3);
    letter-spacing: 0.06em;
  }

  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
  }