html,body{margin:0}
  body{color-scheme:light dark}

  :root {
    --bg: #FBFAF6;
    --bg-2: #F1EEE4;
    --ink: #12303A;
    --ink-2: #4E6068;
    --muted: #7C8C92;
    --line: #D9D3C4;
    --marigold: #E9A23B;
    --marigold-ink: #7A4B05;
    --sindoor: #C43D1E;
    --teal: #0E3B43;
    --good: #2E7D5B;
    --warn: #B4511F;
    --card: #FFFFFF;
    --shadow: 0 10px 30px rgba(18, 48, 58, .08);
  }
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #0E2A31;
      --bg-2: #123740;
      --ink: #F2EEE4;
      --ink-2: #C9D3D6;
      --muted: #93A6AC;
      --line: #27515B;
      --marigold: #F0B354;
      --marigold-ink: #FFE2B0;
      --sindoor: #E8623F;
      --teal: #F2EEE4;
      --good: #6CC49A;
      --warn: #F0A06E;
      --card: #14404A;
      --shadow: 0 10px 30px rgba(0, 0, 0, .35);
    }
  }
  :root[data-theme="dark"] {
    --bg: #0E2A31;
    --bg-2: #123740;
    --ink: #F2EEE4;
    --ink-2: #C9D3D6;
    --muted: #93A6AC;
    --line: #27515B;
    --marigold: #F0B354;
    --marigold-ink: #FFE2B0;
    --sindoor: #E8623F;
    --teal: #F2EEE4;
    --good: #6CC49A;
    --warn: #F0A06E;
    --card: #14404A;
    --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  }

  * { box-sizing: border-box; }
  body {
    background: var(--bg);
    color: var(--ink);
    font-family: "IBM Plex Sans", "Segoe UI", Roboto, system-ui, sans-serif;
    font-size: 17px;
    line-height: 1.55;
    padding-inline: 16px;
    padding-block: 0 48px;
  }
  .wrap { max-width: 760px; margin: 0 auto; }
  h1, h2, h3 { font-family: "Fraunces", Georgia, "Times New Roman", serif; text-wrap: balance; margin: 0; }
  h1 { font-size: clamp(2.1rem, 6vw, 3.4rem); font-weight: 900; line-height: 1.05; letter-spacing: -0.01em; font-variation-settings: "opsz" 144; }
  h2 { font-size: clamp(1.45rem, 3.6vw, 1.9rem); font-weight: 700; line-height: 1.15; }
  h3 { font-size: 1.1rem; font-weight: 700; }
  p { margin: 0; max-width: 62ch; }
  .eyebrow { font-size: .78rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--marigold-ink); }
  .hindi { font-family: "IBM Plex Sans Devanagari", "Noto Sans Devanagari", sans-serif; }

  header.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-block: 18px 8px; border-bottom: 1px solid var(--line); }
  .brand { font-family: "Fraunces", Georgia, serif; font-weight: 700; font-size: 1.15rem; }
  .brand span { color: var(--sindoor); }
  .pill { font-size: .8rem; color: var(--ink-2); border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; white-space: nowrap; }

  .hero { padding-block: 40px 28px; display: grid; gap: 18px; }
  .hero .lead { font-size: 1.12rem; color: var(--ink-2); }

  /* the calculator is the thesis */
  .calc { background: var(--card); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); padding: 22px; display: grid; gap: 16px; }
  .calc label { font-size: .85rem; font-weight: 600; color: var(--ink-2); }
  .calc .row { display: flex; gap: 10px; flex-wrap: wrap; }
  .calc input[type="text"] {
    flex: 1 1 240px; font: inherit; font-size: 1.15rem; padding: 12px 14px; border-radius: 10px;
    border: 1.5px solid var(--line); background: var(--bg); color: var(--ink); min-width: 0;
  }
  .calc input[type="text"]:focus { outline: 3px solid color-mix(in srgb, var(--marigold) 55%, transparent); border-color: var(--marigold); }
  .btn {
    font: inherit; font-weight: 600; padding: 12px 18px; border-radius: 10px; border: 0; cursor: pointer;
    background: var(--teal); color: var(--bg); text-decoration: none; display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  }
  .btn:focus-visible { outline: 3px solid var(--marigold); outline-offset: 2px; }
  .btn.primary { background: var(--sindoor); color: #fff; }
  .btn.ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }

  .result { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: start; padding-top: 6px; border-top: 1px dashed var(--line); }
  .bignum { font-family: "Fraunces", Georgia, serif; font-weight: 900; font-size: clamp(3.2rem, 12vw, 5.2rem); line-height: .9; color: var(--sindoor); font-variant-numeric: tabular-nums; min-width: 2ch; }
  .bignum small { display: block; font-family: "IBM Plex Sans", sans-serif; font-weight: 600; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-top: 6px; }
  .verdict { display: grid; gap: 8px; }
  .badge { display: inline-block; font-size: .8rem; font-weight: 600; padding: 4px 10px; border-radius: 999px; background: var(--bg-2); color: var(--ink-2); }
  .badge.good { background: color-mix(in srgb, var(--good) 18%, transparent); color: var(--good); }
  .badge.warn { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
  .letters { display: flex; flex-wrap: wrap; gap: 6px; font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: .85rem; }
  .letters span { background: var(--bg-2); border-radius: 6px; padding: 3px 7px; }
  .letters span b { color: var(--sindoor); font-weight: 500; }
  .hint { font-size: .9rem; color: var(--muted); }
  @media (max-width: 600px) { .result { grid-template-columns: 1fr; } }

  section { padding-block: 34px; border-top: 1px solid var(--line); display: grid; gap: 16px; }
  .grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
  .tile { background: var(--bg-2); border-radius: 12px; padding: 16px; display: grid; gap: 6px; }
  .tile h3 { font-size: 1rem; }
  .tile p { font-size: .95rem; color: var(--ink-2); }

  .offer { background: var(--card); border: 1.5px solid var(--marigold); border-radius: 16px; padding: 24px; display: grid; gap: 14px; box-shadow: var(--shadow); }
  .price { font-family: "Fraunces", Georgia, serif; font-weight: 900; font-size: 2.6rem; line-height: 1; font-variant-numeric: tabular-nums; }
  .price small { font-family: "IBM Plex Sans", sans-serif; font-size: .9rem; font-weight: 500; color: var(--muted); }
  .offer ul { margin: 0; padding-left: 1.2em; color: var(--ink-2); display: grid; gap: 6px; }
  .cta-row { display: flex; gap: 10px; flex-wrap: wrap; }
  .guarantee { font-size: .9rem; color: var(--ink-2); }

  .steps { display: grid; gap: 10px; counter-reset: step; }
  .steps li { list-style: none; display: grid; grid-template-columns: 34px 1fr; gap: 12px; align-items: start; }
  .steps li::before { counter-increment: step; content: counter(step); font-family: "Fraunces", Georgia, serif; font-weight: 700; font-size: 1.2rem; color: var(--marigold-ink); background: var(--bg-2); border-radius: 50%; width: 34px; height: 34px; display: grid; place-items: center; }
  .steps li p { font-size: .98rem; }

  .tablewrap { overflow-x: auto; }
  table { border-collapse: collapse; font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: .9rem; min-width: 420px; }
  th, td { padding: 6px 10px; border: 1px solid var(--line); text-align: center; }
  th { background: var(--bg-2); font-weight: 500; }
  td.n { color: var(--sindoor); font-weight: 500; }

  details { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
  details + details { margin-top: 8px; }
  summary { cursor: pointer; font-weight: 600; }
  details p { margin-top: 8px; font-size: .95rem; color: var(--ink-2); }

  footer { padding-top: 26px; font-size: .85rem; color: var(--muted); display: grid; gap: 6px; }
  @media (prefers-reduced-motion: no-preference) {
    .bignum { transition: color .25s ease; }
  }