:root {
    --paper: #f4f0e6;
    --paper-2: #ede8da;
    --card: #fffdf7;
    --ink: #16150f;
    --ink-soft: #5b584c;
    --ink-faint: #8d897a;
    --line: #d9d3c2;
    --blue: #2440ff;
    --blue-dark: #1b30c4;
    --red: #e8442e;
    --green: #157f4d;
    --stamp-red: #d43a25;
    --mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    background: var(--paper);
    color: var(--ink);
    font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  ::selection { background: var(--blue); color: #fff; }
  a { color: inherit; text-decoration: none; }
  :focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
  .wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
  .mono { font-family: var(--mono); }

  /* ============ ticker ============ */
  .ticker {
    background: var(--ink); color: #efece0; overflow: hidden; white-space: nowrap;
    border-bottom: 3px solid var(--ink);
    font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.02em;
  }
  .ticker-track { display: inline-block; padding: 8px 0; animation: tick 42s linear infinite; }
  .ticker span { margin: 0 26px 0 0; }
  .ticker b { color: #ffd83d; font-weight: 600; }
  .ticker .pos { color: #6fe3a5; }
  @keyframes tick { from { transform: translateX(0); } to { transform: translateX(-50%); } }

  /* ============ nav ============ */
  header {
    position: sticky; top: 0; z-index: 60;
    background: var(--paper); border-bottom: 2px solid var(--ink);
  }
  .nav { display: flex; align-items: center; height: 62px; gap: 26px; }
  .logo { font-weight: 900; font-size: 21px; letter-spacing: -0.03em; display: flex; align-items: baseline; }
  .logo em { font-style: normal; color: var(--blue); }
  .nav-links { display: flex; gap: 22px; margin-left: auto; font-size: 14px; font-weight: 600; color: var(--ink-soft); }
  .nav-links a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    font-weight: 700; font-size: 15px; padding: 12px 22px; cursor: pointer;
    border: 2px solid var(--ink); border-radius: 0; background: var(--card); color: var(--ink);
    box-shadow: 3px 3px 0 var(--ink); transition: transform .1s, box-shadow .1s;
    white-space: nowrap;
  }
  .btn:hover { transform: translate(-1px,-1px); box-shadow: 5px 5px 0 var(--ink); }
  .btn:active { transform: translate(2px,2px); box-shadow: 1px 1px 0 var(--ink); }
  .btn-blue { background: var(--blue); color: #fff; border-color: var(--ink); }
  .btn-lg { font-size: 17px; padding: 15px 28px; }
  .nav .btn { padding: 8px 16px; font-size: 14px; box-shadow: 2px 2px 0 var(--ink); margin-left: 6px; }

  /* ============ hero ============ */
  .hero { padding: 72px 0 40px; position: relative; }
  .hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
  .kicker-tag {
    display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
    text-transform: uppercase; background: var(--ink); color: var(--paper);
    padding: 5px 10px; margin-bottom: 24px; transform: rotate(-1deg);
  }
  h1 {
    font-size: clamp(42px, 6vw, 72px); line-height: 0.98; letter-spacing: -0.045em; font-weight: 900;
  }
  h1 .strike { position: relative; white-space: nowrap; }
  h1 .strike::after {
    content: ""; position: absolute; left: -2%; right: -2%; top: 52%; height: 0.09em;
    background: var(--red); transform: rotate(-2deg);
  }
  h1 .blue { color: var(--blue); }
  .hero p.lede { margin: 26px 0 30px; font-size: 19px; color: var(--ink-soft); max-width: 520px; }
  .hero p.lede b { color: var(--ink); }
  .hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
  .hero-sub { margin-top: 16px; font-family: var(--mono); font-size: 12.5px; color: var(--ink-faint); }

  /* receipt */
  .receipt-tilt { transform: rotate(1.5deg); position: relative; }
  .receipt {
    background: var(--card); border: 1px solid var(--line);
    box-shadow: 0 14px 40px -12px rgb(22 21 15 / 0.35);
    font-family: var(--mono); font-size: 13px; color: var(--ink);
    padding: 26px 24px 30px; position: relative;
  }
  .receipt::before, .receipt::after {
    content: ""; position: absolute; left: 0; right: 0; height: 10px;
    background:
      linear-gradient(45deg, transparent 33.333%, var(--card) 33.333%, var(--card) 66.667%, transparent 66.667%),
      linear-gradient(-45deg, transparent 33.333%, var(--card) 33.333%, var(--card) 66.667%, transparent 66.667%);
    background-size: 14px 20px;
  }
  .receipt::before { top: -10px; transform: rotate(180deg); }
  .receipt::after { bottom: -10px; }
  .r-head { text-align: center; margin-bottom: 14px; }
  .r-head .r-store { font-weight: 700; font-size: 15px; letter-spacing: 0.04em; }
  .r-head .r-meta { color: var(--ink-faint); font-size: 11.5px; margin-top: 3px; }
  .r-rule { border: none; border-top: 1px dashed var(--line); margin: 12px 0; }
  .r-line { display: flex; justify-content: space-between; gap: 12px; padding: 3px 0; }
  .r-line .lbl { color: var(--ink-soft); }
  .r-line.total { font-weight: 700; font-size: 14px; }
  .r-line .neg { color: var(--red); }
  .r-line .grn { color: var(--green); }
  .r-attr {
    margin: 12px 0; padding: 9px 10px; background: #f2f7ff; border: 1px dashed var(--blue);
    font-size: 12px; color: var(--blue-dark);
  }
  .stamp {
    position: absolute; right: 14px; bottom: 40px;
    font-family: var(--mono); font-weight: 700; font-size: 13px; letter-spacing: 0.12em;
    color: var(--stamp-red); border: 3px double var(--stamp-red); padding: 5px 10px;
    transform: rotate(-11deg); opacity: 0.62; text-transform: uppercase;
    mix-blend-mode: multiply; pointer-events: none;
  }
  .stamp.green { color: var(--green); border-color: var(--green); }

  /* ============ zero banner ============ */
  .zero {
    background: var(--blue); color: #fff; border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink);
    padding: 22px 0; margin-top: 56px;
  }
  .zero .wrap { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; text-align: center; }
  .zero .big { font-weight: 900; font-size: clamp(20px, 2.6vw, 30px); letter-spacing: -0.02em; }
  .zero .mono { font-size: 13px; opacity: 0.85; }

  /* ============ sections ============ */
  section { padding: 88px 0; }
  .sec-tag {
    font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--paper); background: var(--ink); display: inline-block; padding: 4px 10px; margin-bottom: 18px;
    transform: rotate(-1deg);
  }
  h2 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -0.035em; line-height: 1.04; font-weight: 900; max-width: 700px; }
  .sec-lede { margin-top: 16px; font-size: 17px; color: var(--ink-soft); max-width: 620px; }

  /* old playbook: void receipt vs oppfluent receipt */
  .vs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; margin-top: 52px; align-items: start; }
  .vs-grid .receipt-tilt.left { transform: rotate(-1.6deg); }
  .r-title { font-weight: 700; font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; text-align: center; }
  .r-q { color: var(--red); font-weight: 700; }

  /* how it works ledger */
  .ledger { margin-top: 52px; border: 2px solid var(--ink); background: var(--card); box-shadow: 6px 6px 0 var(--ink); }
  .ledger-head {
    display: grid; grid-template-columns: 90px 1fr 2fr; gap: 16px; padding: 10px 22px;
    background: var(--ink); color: var(--paper); font-family: var(--mono); font-size: 11.5px;
    letter-spacing: 0.08em; text-transform: uppercase;
  }
  .ledger-row { display: grid; grid-template-columns: 90px 1fr 2fr; gap: 16px; padding: 22px; border-top: 1px dashed var(--line); align-items: baseline; }
  .ledger-row:first-of-type { border-top: none; }
  .ledger-row .step { font-family: var(--mono); font-size: 13px; color: var(--blue); font-weight: 700; }
  .ledger-row h3 { font-size: 19px; font-weight: 800; letter-spacing: -0.02em; }
  .ledger-row p { font-size: 14.5px; color: var(--ink-soft); }

  /* attribution */
  .attr-band { background: var(--ink); color: var(--paper); }
  .attr-band .sec-tag { background: var(--paper); color: var(--ink); }
  .attr-band h2 { color: #fff; }
  .attr-band .sec-lede { color: #b6b2a2; }
  .attr-chain { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 44px 0 8px; font-family: var(--mono); }
  .attr-pill { font-size: 15px; font-weight: 700; padding: 12px 18px; border: 2px solid #4a473a; color: #b6b2a2; }
  .attr-pill.first { background: var(--blue); border-color: var(--blue); color: #fff; box-shadow: 4px 4px 0 rgb(255 255 255 / 0.15); }
  .attr-pill.second { border-color: #7a7666; color: #efece0; }
  .attr-arrow { color: #6e6a5a; font-size: 18px; }
  .attr-cols { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; margin-top: 40px; }
  .attr-cols h3 { font-size: 16px; font-weight: 800; margin-bottom: 8px; color: #fff; }
  .attr-cols h3 .n { color: #ffd83d; font-family: var(--mono); margin-right: 8px; }
  .attr-cols p { font-size: 14px; color: #b6b2a2; }

  /* funnel chain */
  .funnel-chain { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 44px 0 8px; font-family: var(--mono); }
  .funnel-chain .attr-arrow { color: var(--ink-faint); }
  .funnel-pill { font-size: 15px; font-weight: 700; padding: 12px 18px; border: 2px solid var(--ink); background: var(--card); box-shadow: 3px 3px 0 var(--ink); }
  .funnel-pill.hot { background: var(--green); color: #fff; }

  /* calculator */
  .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-top: 52px; align-items: start; }
  .calc-panel { }
  .calc-panel .field { margin-bottom: 30px; }
  .calc-panel label { display: flex; justify-content: space-between; align-items: baseline; font-weight: 700; font-size: 15px; margin-bottom: 10px; }
  .calc-panel label output { font-family: var(--mono); font-size: 17px; color: var(--blue); font-weight: 700; }
  input[type="range"] {
    -webkit-appearance: none; appearance: none; width: 100%; height: 4px; background: var(--ink);
    outline-offset: 6px; cursor: pointer;
  }
  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none; width: 22px; height: 22px; background: var(--blue);
    border: 2px solid var(--ink); box-shadow: 2px 2px 0 var(--ink); cursor: grab;
  }
  input[type="range"]::-moz-range-thumb {
    width: 22px; height: 22px; background: var(--blue); border: 2px solid var(--ink);
    box-shadow: 2px 2px 0 var(--ink); cursor: grab; border-radius: 0;
  }
  .calc-note { font-size: 13px; color: var(--ink-faint); font-family: var(--mono); }

  /* ============ guarantees ============ */
  .guar { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; margin-top: 52px; }
  .guar-item { border-top: 3px solid var(--ink); padding-top: 18px; }
  .guar-item .g-n { font-family: var(--mono); font-size: 12px; color: var(--blue); font-weight: 700; letter-spacing: 0.08em; }
  .guar-item h3 { font-size: 18px; font-weight: 800; letter-spacing: -0.02em; margin: 6px 0 8px; }
  .guar-item p { font-size: 14.5px; color: var(--ink-soft); }

  /* platforms marquee-ish row */
  .plat-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
  .plat {
    font-family: var(--mono); font-size: 13.5px; font-weight: 600; padding: 10px 16px;
    border: 2px solid var(--ink); background: var(--card); box-shadow: 3px 3px 0 var(--ink);
  }
  .plat.hero-plat { background: var(--ink); color: var(--paper); }
  .plat-note { margin-top: 22px; font-size: 15px; color: var(--ink-soft); max-width: 620px; }
  .plat-note b { color: var(--ink); }

  /* faq */
  .faq { margin-top: 44px; max-width: 780px; }
  details { border-top: 2px solid var(--ink); }
  details:last-child { border-bottom: 2px solid var(--ink); }
  summary {
    cursor: pointer; font-weight: 800; font-size: 17px; letter-spacing: -0.01em; padding: 20px 0;
    list-style: none; display: flex; justify-content: space-between; gap: 18px; align-items: baseline;
  }
  summary::-webkit-details-marker { display: none; }
  summary::after { content: "+"; font-family: var(--mono); font-size: 22px; color: var(--blue); flex-shrink: 0; }
  details[open] summary::after { content: "−"; }
  details .a { padding: 0 0 22px; font-size: 15px; color: var(--ink-soft); max-width: 660px; }

  /* creator strip */
  .creator-strip {
    margin-top: 0; border: 2px solid var(--ink); background: var(--card); box-shadow: 6px 6px 0 var(--ink);
    padding: 30px 34px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  }
  .creator-strip h3 { font-size: 21px; font-weight: 900; letter-spacing: -0.02em; }
  .creator-strip p { font-size: 14.5px; color: var(--ink-soft); margin-top: 4px; max-width: 520px; }

  /* final */
  .final { background: var(--ink); color: var(--paper); text-align: center; padding: 100px 0; border-top: 2px solid var(--ink); }
  .final h2 { color: #fff; margin: 0 auto; max-width: 760px; }
  .final .blue { color: #7d92ff; }
  .final p { margin: 20px auto 36px; color: #b6b2a2; font-size: 17px; max-width: 540px; }
  .final .btn { border-color: var(--paper); box-shadow: 4px 4px 0 rgb(244 240 230 / 0.4); }
  .final .mono-note { margin-top: 18px; font-family: var(--mono); font-size: 12.5px; color: #6e6a5a; }

  footer { background: var(--ink); color: #8d897a; font-size: 13px; padding: 0 0 44px; }
  .foot-inner { border-top: 1px dashed #4a473a; padding-top: 26px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-family: var(--mono); }
  footer a:hover { color: #fff; }
  .foot-links { display: flex; gap: 20px; }

  @media (max-width: 900px) {
    .hero-grid, .vs-grid, .calc-grid { grid-template-columns: 1fr; }
    .attr-cols, .guar { grid-template-columns: 1fr; gap: 32px; }
    .nav-links { display: none; }
    .hero { padding: 48px 0 24px; }
    section { padding: 64px 0; }
    .ledger-head { display: none; }
    .ledger-row { grid-template-columns: 1fr; gap: 6px; }
    .receipt-tilt { transform: rotate(0.8deg); max-width: 420px; margin: 0 auto; }
  }

/* ============ demo form ============ */
.demo-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; margin-top: 48px; align-items: start; }
.demo-form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.demo-form .full { grid-column: 1 / -1; }
.demo-form label { display: block; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 6px; }
.demo-form input, .demo-form select, .demo-form textarea {
  width: 100%; padding: 12px 14px; font-size: 15px; font-family: inherit; color: var(--ink);
  background: var(--card); border: 2px solid var(--ink); border-radius: 0; box-shadow: 3px 3px 0 var(--ink);
}
.demo-form textarea { resize: vertical; min-height: 96px; }
.demo-form input:focus, .demo-form select:focus, .demo-form textarea:focus { outline: 3px solid var(--blue); outline-offset: 2px; }
.demo-note { font-family: var(--mono); font-size: 12.5px; color: var(--ink-faint); margin-top: 14px; }
.demo-points { list-style: none; display: flex; flex-direction: column; gap: 14px; margin-top: 28px; }
.demo-points li { display: flex; gap: 10px; font-size: 15px; color: var(--ink-soft); align-items: baseline; }
.demo-points .tick { color: var(--green); font-weight: 700; flex-shrink: 0; }

/* ============ blog ============ */
.post-list { display: grid; grid-template-columns: 1fr; gap: 20px; margin-top: 48px; max-width: 780px; }
.post-card { border: 2px solid var(--ink); background: var(--card); box-shadow: 4px 4px 0 var(--ink); padding: 26px 28px; display: block; transition: transform .1s, box-shadow .1s; }
.post-card:hover { transform: translate(-2px,-2px); box-shadow: 6px 6px 0 var(--ink); }
.post-card .p-meta { font-family: var(--mono); font-size: 12px; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.06em; }
.post-card h3 { font-size: 21px; font-weight: 800; letter-spacing: -0.02em; margin: 8px 0 8px; }
.post-card p { font-size: 14.5px; color: var(--ink-soft); }
.post { max-width: 720px; margin: 0 auto; }
.post .p-meta { font-family: var(--mono); font-size: 12.5px; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 14px; }
.post h1 { font-size: clamp(32px, 4.6vw, 48px); margin-bottom: 22px; }
.post h2 { font-size: 24px; margin: 40px 0 14px; max-width: none; }
.post p, .post li { font-size: 16.5px; line-height: 1.7; color: var(--ink-soft); margin-bottom: 16px; }
.post li { margin-bottom: 8px; }
.post ul, .post ol { padding-left: 24px; margin-bottom: 16px; }
.post strong { color: var(--ink); }
.post a { color: var(--blue-dark); text-decoration: underline; text-underline-offset: 3px; }
.post blockquote { border-left: 4px solid var(--blue); padding: 4px 0 4px 18px; margin: 20px 0; font-style: italic; }
.post .cta-box { border: 2px solid var(--ink); background: var(--card); box-shadow: 4px 4px 0 var(--ink); padding: 24px 26px; margin: 36px 0; }
.post .cta-box p { margin-bottom: 14px; }
.guar.cols-2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 900px) { .demo-grid { grid-template-columns: 1fr; } .demo-form { grid-template-columns: 1fr; } .guar.cols-2 { grid-template-columns: 1fr; } }

/* ============ founder note ============ */
.founder-card { border: 2px solid var(--ink); background: var(--card); box-shadow: 6px 6px 0 var(--ink); padding: 30px 34px; max-width: 820px; margin-top: 40px; }
.founder-card .f-lede { font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.founder-card p { font-size: 15.5px; color: var(--ink-soft); }
.founder-card .f-lede { color: var(--ink); }
.f-entries { font-family: var(--mono); font-size: 13px; color: var(--ink-soft); display: flex; flex-direction: column; gap: 10px; margin: 18px 0; padding: 16px 0; border-top: 1px dashed var(--line); border-bottom: 1px dashed var(--line); }
.chain-note { font-family: var(--mono); font-size: 12.5px; color: var(--ink-faint); margin-top: 12px; }

/* narrow-viewport nav + footer wrap */
.foot-links { flex-wrap: wrap; }
@media (max-width: 600px) {
  .nav { gap: 12px; flex-wrap: wrap; height: auto; min-height: 62px; padding: 8px 0; }
  .nav .btn { padding: 7px 10px; font-size: 12.5px; margin-left: 0; }
  .logo { font-size: 18px; }
}

/* ============ A/B variants ============ */
.phase-chip { display: inline-block; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.07em; color: var(--green); border: 1px solid var(--green); padding: 2px 7px; margin: 6px 0 2px; }