/*
 * Design tokens + component styles extracted verbatim from the CEO-approved
 * mockup at docs/design/pay-page-mockup.html. This is the single source of
 * truth for the client-facing pages' visual language — do not fork it;
 * extend it in place as phases 3/4 build out the sign/pay/receipt states.
 */
  :root {
    --ground: #f4f7f3;
    --ground-admin: #eef1ee;
    --card: #ffffff;
    --card-foot: #fbfcfa;
    --ink: #17251c;
    --muted: #5f6f63;
    --faint: #8a978d;
    --border: #dfe6df;
    --border-faint: #eef2ee;
    --accent: #2e7d4f;
    --accent-dark: #235f3c;
    --accent-tint: #e9f3ec;
    --amber: #9a6b1f;
    --amber-tint: #faf3e3;
    --amber-border: #ecd9a8;
    --red: #a33d2a;
    --red-tint: #fbeae5;
    --red-border: #ecc8bd;
    --red-deep: #832f22;
    --blue: #2a5b8a;
    --blue-tint: #e8f0f7;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    background: var(--ground);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    padding: 32px 16px 64px;
  }
  .wrap { max-width: 920px; margin: 0 auto; }

  /* ---------- header + state tabs ---------- */
  .mock-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 16px; margin-bottom: 8px; }
  .mock-head h1 { font-size: 17px; font-weight: 650; letter-spacing: -0.01em; }
  .mock-head .sub { font-size: 13px; color: var(--muted); }
  .tabs { display: flex; gap: 6px; margin: 16px 0 20px; flex-wrap: wrap; }
  .tab {
    font: inherit; font-size: 13px; font-weight: 550; color: var(--muted);
    background: transparent; border: 1px solid var(--border); border-radius: 99px;
    padding: 7px 15px; cursor: pointer;
  }
  .tab:hover { border-color: var(--faint); color: var(--ink); }
  .tab.active { background: var(--ink); border-color: var(--ink); color: #fff; }
  .tab:focus-visible, .btn:focus-visible, input:focus-visible, .seg button:focus-visible {
    outline: 2px solid var(--accent); outline-offset: 2px;
  }

  /* ---------- fake browser chrome ---------- */
  .browser {
    background: var(--card); border: 1px solid var(--border); border-radius: 12px;
    box-shadow: 0 1px 2px rgba(23,37,28,.05), 0 12px 32px -16px rgba(23,37,28,.14);
    overflow: hidden;
  }
  .browser-bar {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 14px; border-bottom: 1px solid var(--border); background: var(--card-foot);
  }
  .dots { display: flex; gap: 6px; flex: none; }
  .dots span { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
  .urlbar {
    flex: 1; display: flex; align-items: center; gap: 7px;
    background: var(--ground); border: 1px solid var(--border); border-radius: 8px;
    padding: 6px 12px; font-size: 12.5px; color: var(--muted);
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    white-space: nowrap; overflow: hidden;
  }
  .urlbar .lock { color: var(--accent); flex: none; }
  .urlbar b { color: var(--ink); font-weight: 600; }

  .stage { padding: 44px 20px 52px; background:
    linear-gradient(180deg, #fbfcfa 0%, var(--ground) 120px); min-height: 560px; }

  /* ---------- the payment card ---------- */
  .paycard {
    max-width: 460px; margin: 0 auto; background: var(--card);
    border: 1px solid var(--border); border-radius: 16px;
    box-shadow: 0 1px 2px rgba(23,37,28,.04), 0 16px 40px -20px rgba(23,37,28,.18);
    overflow: hidden;
  }
  .paycard-inner { padding: 28px 28px 24px; }

  .brandrow { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
  .wordmark { display: flex; align-items: center; gap: 9px; }
  .leaf {
    width: 30px; height: 30px; border-radius: 8px; background: var(--accent);
    display: grid; place-items: center; color: #fff; flex: none;
  }
  .leaf svg { width: 17px; height: 17px; }
  .wordmark .name { font-size: 16px; font-weight: 700; letter-spacing: -0.02em; }
  .inv-chip {
    font-size: 12px; font-weight: 600; color: var(--muted);
    background: var(--ground); border: 1px solid var(--border);
    border-radius: 99px; padding: 4px 11px;
    font-variant-numeric: tabular-nums;
  }

  .amount-block { margin-bottom: 6px; }
  .amount-label { font-size: 12.5px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--faint); margin-bottom: 4px; }
  .amount { font-size: 40px; font-weight: 700; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; line-height: 1.1; }
  .amount small { font-size: 22px; font-weight: 600; color: var(--muted); }
  .due { font-size: 13.5px; color: var(--muted); margin-top: 5px; }
  .due .pill {
    display: inline-block; font-size: 11.5px; font-weight: 650; color: var(--amber);
    background: var(--amber-tint); border-radius: 99px; padding: 2px 9px; margin-left: 7px;
    letter-spacing: .02em;
  }
  .pill.ok { color: var(--accent-dark); background: var(--accent-tint); }

  .lines { border-top: 1px solid var(--border); margin-top: 20px; padding-top: 6px; }
  .line { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; font-size: 14px; }
  .line + .line { border-top: 1px dashed var(--border); }
  .line .desc { color: var(--ink); }
  .line .meta { display: block; font-size: 12.5px; color: var(--faint); margin-top: 2px; }
  .line .val { font-variant-numeric: tabular-nums; font-weight: 550; white-space: nowrap; }
  .line.total { border-top: 1px solid var(--border); font-weight: 700; }

  /* payment method segmented control */
  .seg {
    display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 22px 0 14px;
  }
  .seg button {
    font: inherit; font-size: 13.5px; font-weight: 600; cursor: pointer;
    border: 1.5px solid var(--border); background: var(--card); color: var(--muted);
    border-radius: 10px; padding: 11px 10px; text-align: left; line-height: 1.35;
  }
  .seg button .m-sub { display: block; font-size: 11.5px; font-weight: 500; color: var(--faint); margin-top: 1px; }
  .seg button.on { border-color: var(--accent); color: var(--ink); background: var(--accent-tint); }
  .seg button.on .m-sub { color: var(--accent-dark); }

  /* hosted iframe region */
  .iframe-region {
    border: 1.5px dashed #b8cbbd; border-radius: 12px; background: #fbfdfb;
    padding: 16px 16px 14px; position: relative;
  }
  .iframe-tag {
    position: absolute; top: -9px; right: 12px;
    font-size: 10.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
    color: var(--accent-dark); background: var(--accent-tint);
    border-radius: 4px; padding: 2px 7px;
  }
  .field { margin-bottom: 10px; }
  .field label { display: block; font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 5px; }
  .field input {
    width: 100%; font: inherit; font-size: 14.5px; color: var(--ink);
    border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; background: #fff;
    font-variant-numeric: tabular-nums;
  }
  .field input::placeholder { color: var(--faint); }
  .field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .save-row { display: flex; gap: 9px; align-items: flex-start; font-size: 13px; color: var(--muted); margin-top: 4px; line-height: 1.45; }
  .save-row input { margin-top: 3px; accent-color: var(--accent); }

  .btn {
    display: block; width: 100%; font: inherit; font-size: 15.5px; font-weight: 650;
    color: #fff; background: var(--accent); border: none; border-radius: 10px;
    padding: 14px; cursor: pointer; margin-top: 18px; letter-spacing: -0.01em;
  }
  .btn:hover { background: var(--accent-dark); }
  .trust {
    display: flex; align-items: center; justify-content: center; gap: 7px;
    font-size: 12px; color: var(--faint); margin-top: 14px;
  }
  .trust svg { width: 12px; height: 12px; color: var(--accent); }
  .paycard-foot {
    border-top: 1px solid var(--border); background: var(--card-foot);
    padding: 13px 28px; font-size: 12.5px; color: var(--faint);
    display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  }
  .paycard-foot a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--border); }

  /* ---------- lookup state ---------- */
  .lookup-lede { text-align: center; margin: 4px 0 24px; }
  .lookup-lede h2 { font-size: 21px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 7px; text-wrap: balance; }
  .lookup-lede p { font-size: 14px; color: var(--muted); line-height: 1.55; max-width: 34ch; margin: 0 auto; }

  /* ---------- receipt state ---------- */
  .receipt-head { text-align: center; padding: 6px 0 4px; }
  .check {
    width: 56px; height: 56px; border-radius: 50%; background: var(--accent-tint);
    display: grid; place-items: center; margin: 0 auto 16px; color: var(--accent-dark);
  }
  .check svg { width: 26px; height: 26px; }
  .receipt-head h2 { font-size: 21px; font-weight: 700; letter-spacing: -0.02em; }
  .receipt-head .r-amount { font-size: 36px; font-weight: 700; letter-spacing: -0.03em; margin: 10px 0 4px; font-variant-numeric: tabular-nums; }
  .receipt-head p { font-size: 13.5px; color: var(--muted); }
  .r-details { border-top: 1px solid var(--border); margin-top: 22px; padding-top: 8px; }
  .r-row { display: flex; justify-content: space-between; padding: 8px 0; font-size: 13.5px; }
  .r-row dt { color: var(--muted); }
  .r-row dd { font-weight: 550; font-variant-numeric: tabular-nums; }
  .btn.ghost { background: var(--card); color: var(--ink); border: 1.5px solid var(--border); }
  .btn.ghost:hover { background: var(--ground); }

  /* ---------- annotations under stage ---------- */
  .notes { margin-top: 22px; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
  .note {
    background: var(--card); border: 1px solid var(--border); border-radius: 12px;
    padding: 15px 17px; font-size: 13px; line-height: 1.55; color: var(--muted);
  }
  .note b { display: block; color: var(--ink); font-size: 13px; margin-bottom: 4px; font-weight: 650; }

  .state { display: none; }
  .state.visible { display: block; }
  @media (prefers-reduced-motion: no-preference) {
    .state.visible { animation: rise .28s ease; }
    @keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
  }
  @media (max-width: 540px) {
    .stage { padding: 24px 10px 32px; }
    .paycard-inner { padding: 22px 18px 20px; }
    .paycard-foot { padding: 12px 18px; }
  }