/* No framework. No build step. Just a stylesheet that does its job and shuts up. */

:root {
  --ink:        #16181d;
  --ink-soft:   #565c69;
  --ink-faint:  #878d9b;
  --line:       #e2e5ea;
  --line-soft:  #eef0f4;
  --paper:      #ffffff;
  --ground:     #f6f7f9;
  --accent:     #2f5bd7;
  --accent-ink: #ffffff;
  --accent-wash:#eef2fd;
  --danger:     #b3261e;
  --danger-wash:#fdf0ef;

  --r-sm: 6px;
  --r:    10px;
  --r-lg: 14px;

  --shadow: 0 1px 2px rgba(22,24,29,.05), 0 8px 24px -16px rgba(22,24,29,.18);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--ground);
  -webkit-font-smoothing: antialiased;
}

/* ---------- shell ---------- */

.masthead {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.masthead__inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.wordmark {
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.wordmark span { color: var(--ink-faint); font-weight: 450; }

.shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 24px 72px;
}

/* ---------- progress ---------- */

.steps {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.steps__item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-faint);
}

.steps__item + .steps__item::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--line);
  margin-right: 4px;
}

.steps__dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-faint);
}

.steps__item[data-state="current"] { color: var(--ink); font-weight: 550; }
.steps__item[data-state="current"] .steps__dot {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.steps__item[data-state="done"] { color: var(--ink-soft); }
.steps__item[data-state="done"] .steps__dot {
  background: var(--accent-wash);
  border-color: transparent;
  color: var(--accent);
}

/* ---------- card ---------- */

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  padding: 28px;
}

.card__title {
  margin: 0 0 6px;
  font-size: 21px;
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 650;
}

.card__lede {
  margin: 0 0 24px;
  color: var(--ink-soft);
  font-size: 14px;
}

/* ---------- fields ---------- */

.field { margin-bottom: 18px; }

.field__label {
  display: block;
  font-size: 13px;
  font-weight: 550;
  margin-bottom: 6px;
}

.field__hint {
  display: block;
  font-size: 12px;
  color: var(--ink-faint);
  font-weight: 400;
  margin-top: 2px;
}

.input,
.select {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r);
  transition: border-color .12s ease, box-shadow .12s ease;
}

.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%23878d9b' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 34px;
}

.input:focus,
.select:focus,
.choice:focus-within,
.check:focus-within {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-wash);
}

.input[aria-invalid="true"] { border-color: var(--danger); }

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 480px) {
  .row { grid-template-columns: 1fr; gap: 0; }
  .card { padding: 22px 18px; }
  .steps__item span:not(.steps__dot) { display: none; }
}

/* phone with a prefix that comes from step 1 */
.prefixed { display: flex; }
.prefixed__tag {
  display: grid;
  place-items: center;
  padding: 0 12px;
  font-size: 14px;
  color: var(--ink-soft);
  background: var(--ground);
  border: 1px solid var(--line);
  border-right: 0;
  border-radius: var(--r) 0 0 var(--r);
  white-space: nowrap;
}
.prefixed .input { border-radius: 0 var(--r) var(--r) 0; }

/* ---------- choice cards (radio) ---------- */

.choices { display: grid; gap: 10px; }

.choice {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  cursor: pointer;
  transition: border-color .12s ease, background-color .12s ease;
}

.choice:hover { border-color: #cdd2db; }

.choice input { margin: 2px 0 0; accent-color: var(--accent); }

.choice:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-wash);
}

.choice > span:last-child { display: block; }
.choice__title { display: block; font-weight: 550; font-size: 14px; }
.choice__desc  { display: block; font-size: 13px; color: var(--ink-soft); margin-top: 2px; }

/* ---------- checkboxes ---------- */

.checks { display: grid; gap: 8px; }

.check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  cursor: pointer;
  font-size: 14px;
}

.check input { margin: 2px 0 0; accent-color: var(--accent); }
.check:has(input:checked) { border-color: var(--accent); background: var(--accent-wash); }
.check__note { display: block; font-size: 12px; color: var(--ink-soft); margin-top: 1px; }

/* ---------- carried-forward context ---------- */

/* The whole point of the test lives in this box. Make it visible, not shouty. */
.carried {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 13px 14px;
  margin: 0 0 24px;
  background: var(--accent-wash);
  border-radius: var(--r);
  font-size: 13px;
  color: var(--ink-soft);
}

.carried strong { color: var(--ink); font-weight: 600; }

.carried__mark {
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
}

/* ---------- review ---------- */

.review { border-top: 1px solid var(--line-soft); }

.review__group { padding: 16px 0; border-bottom: 1px solid var(--line-soft); }

.review__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.review__title {
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0;
}

.review__edit {
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 550;
}

.review__edit:hover { text-decoration: underline; }

.review__list { margin: 0; display: grid; grid-template-columns: 148px 1fr; gap: 7px 16px; }
.review__list dt { color: var(--ink-soft); font-size: 14px; }
.review__list dd { margin: 0; font-size: 14px; word-break: break-word; }

@media (max-width: 480px) {
  .review__list { grid-template-columns: 1fr; gap: 1px 0; }
  .review__list dd { margin-bottom: 8px; }
}

/* ---------- actions ---------- */

.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
}

.btn {
  font: inherit;
  font-size: 15px;
  font-weight: 550;
  padding: 11px 20px;
  border-radius: var(--r);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background-color .12s ease, border-color .12s ease;
}

.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: #2749b0; }

.btn--ghost { background: transparent; color: var(--ink-soft); border-color: var(--line); }
.btn--ghost:hover { border-color: #cdd2db; color: var(--ink); }

.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- errors ---------- */

.error {
  display: none;
  font-size: 13px;
  color: var(--danger);
  margin-top: 5px;
}

.error[data-shown] { display: block; }

.summary-error {
  display: none;
  padding: 11px 14px;
  margin-bottom: 20px;
  background: var(--danger-wash);
  border: 1px solid #f0c9c6;
  border-radius: var(--r);
  color: var(--danger);
  font-size: 14px;
}

.summary-error[data-shown] { display: block; }

/* ---------- done ---------- */

.done__tick {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-wash);
  color: var(--accent);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}

/* ---------- footer ---------- */

.footnote {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
  font-size: 12px;
  color: var(--ink-faint);
}

.footnote a { color: var(--ink-faint); }

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

/* ========== entry menu ========== */

.menu { display: grid; gap: 14px; }

.menu__card {
  display: block;
  padding: 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: border-color .12s ease, transform .12s ease;
}

.menu__card:hover { border-color: var(--accent); transform: translateY(-1px); }

.menu__kicker {
  font-size: 11px;
  font-weight: 650;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 7px;
}

.menu__title { font-size: 17px; font-weight: 650; letter-spacing: -0.01em; margin: 0 0 5px; }
.menu__desc  { font-size: 14px; color: var(--ink-soft); margin: 0; }

.menu__meta {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  color: var(--ink-faint);
}

/* ========== calculator ========== */

/* The running total. Sticks around while they type so cause and effect are
   impossible to miss — which is the entire point of the exercise. */
.readout {
  background: var(--ink);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 20px 22px;
  margin: 0 0 22px;
}

.readout__label {
  font-size: 11px;
  font-weight: 650;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: rgba(255,255,255,.55);
  margin-bottom: 6px;
}

.readout__figure {
  font-size: 32px;
  font-weight: 680;
  letter-spacing: -0.03em;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}

.readout__note { font-size: 13px; color: rgba(255,255,255,.62); margin-top: 8px; }

.readout--warn { background: #6b2018; }

.readout__split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,.14);
}

.readout__sub-label { font-size: 12px; color: rgba(255,255,255,.55); }
.readout__sub-value { font-size: 17px; font-weight: 620; font-variant-numeric: tabular-nums; margin-top: 2px; }

/* the working-out, so a participant can see where a number came from */
.working { margin: 0 0 22px; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }

.working > summary {
  padding: 11px 14px;
  font-size: 13px;
  font-weight: 550;
  cursor: pointer;
  background: var(--ground);
  list-style: none;
}

.working > summary::-webkit-details-marker { display: none; }
.working > summary::after { content: " ▾"; color: var(--ink-faint); }
.working[open] > summary::after { content: " ▴"; }

.working__body { padding: 6px 14px 14px; }

.working__row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 7px 0;
  font-size: 13px;
  border-bottom: 1px solid var(--line-soft);
}

.working__row:last-child { border-bottom: 0; }
.working__row span:last-child { font-variant-numeric: tabular-nums; white-space: nowrap; }
.working__row--total { font-weight: 650; border-top: 1px solid var(--line); margin-top: 4px; padding-top: 10px; }
.working__row--sub span:first-child { color: var(--ink-soft); padding-left: 12px; }

/* money input with a leading $ */
.money { display: flex; }
.money__tag {
  display: grid;
  place-items: center;
  padding: 0 12px;
  font-size: 15px;
  color: var(--ink-soft);
  background: var(--ground);
  border: 1px solid var(--line);
  border-right: 0;
  border-radius: var(--r) 0 0 var(--r);
}
.money .input { border-radius: 0 var(--r) var(--r) 0; font-variant-numeric: tabular-nums; }

.suffixed { display: flex; }
.suffixed .input { border-radius: var(--r) 0 0 var(--r); font-variant-numeric: tabular-nums; }
.suffixed__tag {
  display: grid;
  place-items: center;
  padding: 0 12px;
  font-size: 15px;
  color: var(--ink-soft);
  background: var(--ground);
  border: 1px solid var(--line);
  border-left: 0;
  border-radius: 0 var(--r) var(--r) 0;
}

/* inline flag when a number goes somewhere it shouldn't */
.flag {
  display: none;
  padding: 11px 14px;
  margin: -6px 0 20px;
  border-radius: var(--r);
  font-size: 13px;
  background: var(--danger-wash);
  border: 1px solid #f0c9c6;
  color: var(--danger);
}

.flag[data-shown] { display: block; }
.flag--ok { background: var(--accent-wash); border-color: transparent; color: var(--ink-soft); }
.flag--ok strong { color: var(--ink); }

.slider { width: 100%; accent-color: var(--accent); margin-top: 10px; }

.disclaimer {
  font-size: 12px;
  color: var(--ink-faint);
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

@media (max-width: 480px) {
  .readout__figure { font-size: 27px; }
  .readout__split { grid-template-columns: 1fr; gap: 12px; }
}

/* ========== research banner ========== */

/* Loud on purpose. This thing wears a fake bank's name and asks for income and
   date of birth — it has to say what it is before anyone types a real number
   into it. Sticky, so it's still saying it on step 3. */

.warnbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #ffc400;
  color: #1a1400;
  border-bottom: 2px solid #1a1400;
  padding: 12px 24px;
  text-align: center;
}

.warnbar__title {
  font-size: 15px;
  font-weight: 750;
  letter-spacing: .01em;
  line-height: 1.25;
  text-transform: uppercase;
}

.warnbar__sub {
  font-size: 12.5px;
  font-weight: 550;
  margin-top: 3px;
  color: #3d3200;
}

@media (max-width: 480px) {
  .warnbar { padding: 10px 16px; }
  .warnbar__title { font-size: 13.5px; }
  .warnbar__sub { font-size: 11.5px; }
}

/* Masthead sits directly under the bar; it must not also be sticky or they fight. */
.masthead { position: relative; z-index: 1; }