/*
 * Insufferable Pedantry: prototype styles.
 *
 * Deliberately light-only: the brief is a clean white page in the manner of
 * the FT. Financier Display and Metric are licensed faces, so Newsreader and
 * Schibsted Grotesk stand in; long copy uses Georgia, as FT.com does.
 */

:root {
  color-scheme: light;

  --paper: #ffffff;
  --ink: #1a1817;
  --text: #33302e;
  --muted: #6b6560;
  --rule: #e6e1db;
  --rule-strong: #1a1817;
  --tint: #fff1e5;
  --tint-strong: #f2dfce;

  --claret: #990f3d;
  --oxford: #0f5499;
  --good: #0d7680;
  --good-tint: #e4f1f0;
  --bad: #b3001e;
  --bad-tint: #fbeaea;

  --display: 'Newsreader', 'Georgia', 'Times New Roman', serif;
  --sans: 'Schibsted Grotesk', 'Helvetica Neue', 'Arial', sans-serif;
  --serif: 'Georgia', 'Times New Roman', serif;

  --gutter: 16px;
  --column: 680px;
  --dock-h: 104px;
}

* {
  box-sizing: border-box;
}

html,
body {
  background: var(--paper);
  color: var(--text);
}

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--oxford);
  outline-offset: 2px;
}

.shell {
  max-width: var(--column);
  margin: 0 auto;
  padding-inline: var(--gutter);
  padding-block: 0 calc(var(--dock-h) + 40px + env(safe-area-inset-bottom, 0px));
}

/* Type utilities */

.kicker {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--claret);
}

/* No tabular figures here: in this face they widen commas too. */
.meta {
  font-size: 13px;
  color: var(--muted);
}

.section-title {
  margin: 0;
  font-family: var(--display);
  font-size: 34px;
  font-weight: 500;
  line-height: 1.1;
  color: var(--ink);
  text-wrap: balance;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-block: 20px 12px;
  border-bottom: 1px solid var(--rule-strong);
}

.text-btn {
  border: 0;
  background: none;
  padding: 4px 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--oxford);
  cursor: pointer;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover {
  background: var(--tint);
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover {
  background: #000;
}

.btn:disabled {
  border-color: var(--rule);
  background: var(--rule);
  color: var(--muted);
  cursor: default;
}

/* Masthead */

.masthead {
  display: grid;
  justify-items: center;
  gap: 2px;
  padding-block: 10px 14px;
  border-bottom: 4px double var(--rule-strong);
}

.masthead-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.dateline {
  font-size: 12px;
  color: var(--muted);
}

.wordmark {
  font-family: var(--display);
  font-size: clamp(32px, 8vw, 48px);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.05;
  color: var(--ink);
  text-decoration: none;
  text-align: center;
}

.tagline {
  margin: 0;
  max-width: 44ch;
  font-family: var(--display);
  font-style: italic;
  font-size: 14px;
  line-height: 1.35;
  color: var(--muted);
  text-align: center;
  text-wrap: balance;
}

.view {
  outline: none;
}

/* Home */

.lead {
  display: grid;
  gap: 8px;
  padding-block: 24px 20px;
  border-bottom: 1px solid var(--rule);
}

.lead-headline {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(28px, 6.4vw, 40px);
  font-weight: 500;
  line-height: 1.1;
  color: var(--ink);
  text-wrap: balance;
}

.lead-fact {
  margin: 0;
  max-width: 34ch;
  font-family: var(--display);
  font-size: clamp(24px, 5.2vw, 32px);
  font-weight: 400;
  line-height: 1.25;
  color: var(--ink);
  text-wrap: pretty;
}

.lead-fact a {
  text-decoration: none;
}

.lead-fact a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.lead-headline a {
  text-decoration: none;
}

.lead-headline a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.standfirst {
  margin: 0;
  max-width: 60ch;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.5;
  color: var(--text);
}

.list-label {
  margin: 0;
  padding-block: 20px 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}

.plain-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.row-link {
  display: grid;
  grid-template-columns: 96px 1fr;
  align-items: baseline;
  gap: 12px;
  padding-block: 12px;
  border-top: 1px solid var(--rule);
  text-decoration: none;
}

.row-link:hover .row-title {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.row-title {
  font-family: var(--display);
  font-size: 20px;
  line-height: 1.25;
  color: var(--ink);
}

.list-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.row-title-small {
  font-size: 18px;
}

/* Daily fact */

.fact {
  display: grid;
  gap: 10px;
  padding-block: 24px 22px;
  border-bottom: 1px solid var(--rule);
}

.fact-text {
  margin: 0;
  max-width: 32ch;
  font-family: var(--display);
  font-size: clamp(26px, 6vw, 36px);
  line-height: 1.22;
  color: var(--ink);
  text-wrap: pretty;
}

.fact-text + .meta {
  margin: 0;
}

.fact-row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  align-items: baseline;
  padding-block: 12px;
  border-top: 1px solid var(--rule);
}

.fact-row p {
  margin: 0;
}

.fact-row-text {
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.45;
  color: var(--text);
}

.record {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 0;
  padding-block: 14px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.record b {
  font-weight: 700;
  color: var(--ink);
}

/* Dock */

.dock {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 20;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--paper);
  border-top: 1px solid var(--rule-strong);
}

.dock-inner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  max-width: var(--column);
  margin: 0 auto;
  padding: 10px var(--gutter) 12px;
}

.dock-card {
  display: grid;
  align-content: start;
  gap: 2px;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  background: var(--paper);
  text-decoration: none;
  transition:
    background-color 0.15s,
    border-color 0.15s,
    opacity 0.2s;
}

.dock-card:hover {
  border-color: var(--ink);
}

.dock-card.is-active {
  background: var(--tint);
  border-color: var(--ink);
}

.dock-title {
  font-family: var(--display);
  font-size: 17px;
  line-height: 1.2;
  color: var(--ink);
}

.dock-meta {
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.badge-new {
  display: inline-block;
  padding: 0 5px;
  background: var(--claret);
  color: var(--paper);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: 2px;
}

/* News */

.news-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-item {
  display: grid;
  gap: 6px;
  padding-block: 18px;
  border-bottom: 1px solid var(--rule);
}

.news-top {
  display: flex;
  align-items: center;
  gap: 8px;
}

.news-headline {
  margin: 0;
  font-family: var(--display);
  font-size: 23px;
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink);
  text-wrap: balance;
}

.news-standfirst {
  margin: 0;
  max-width: 62ch;
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.5;
}

.news-feed-note {
  margin: 0;
  padding-block: 10px 0;
}

.news-source {
  color: var(--oxford);
  text-decoration: none;
}

.news-source:hover {
  text-decoration: underline;
}

/* Diagnosis */

.case-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-block: 14px;
}

.case-dot {
  width: 32px;
  height: 32px;
  border: 1px solid var(--rule);
  background: var(--paper);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}

.case-dot:hover {
  border-color: var(--ink);
}

.case-dot.is-current {
  border: 2px solid var(--ink);
  font-weight: 700;
}

.case-dot.is-solved {
  background: var(--good-tint);
  border-color: var(--good);
  color: var(--good);
}

.case-dot.is-failed {
  background: var(--bad-tint);
  border-color: var(--bad);
  color: var(--bad);
}

.case-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-block: 6px 10px;
  border-top: 1px solid var(--rule);
}

.case-title {
  margin: 0;
  font-family: var(--display);
  font-size: 26px;
  font-weight: 500;
  color: var(--ink);
}

.points {
  font-size: 14px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--claret);
}

.clues {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: clue;
}

.clue {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  align-items: baseline;
  padding-block: 11px;
  border-top: 1px solid var(--rule);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.4;
  color: var(--ink);
}

.clue::before {
  counter-increment: clue;
  content: counter(clue);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--claret);
  font-variant-numeric: tabular-nums;
}

.clue.is-hidden {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 14px;
}

.clue.is-hidden::before {
  color: var(--muted);
}

.clue.is-new {
  animation: reveal 0.35s ease-out;
}

@keyframes reveal {
  from {
    background: var(--tint);
  }
  to {
    background: transparent;
  }
}

.guess {
  display: grid;
  gap: 8px;
  padding-block: 16px 4px;
  border-top: 1px solid var(--rule);
}

.guess-row {
  display: flex;
  gap: 8px;
}

.field {
  flex: 1;
  min-width: 0;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--muted);
  border-radius: 0;
  background: var(--paper);
  font: inherit;
  font-size: 16px;
  color: var(--ink);
}

.field:focus {
  border-color: var(--ink);
  outline: none;
  box-shadow: 0 0 0 1px var(--ink);
}

.suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chip {
  padding: 6px 10px;
  border: 1px solid var(--rule);
  background: var(--paper);
  font-size: 14px;
  text-align: left;
  cursor: pointer;
}

.chip:hover {
  border-color: var(--ink);
  background: var(--tint);
}

.guess-actions {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.ruled-out {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--bad);
}

.ruled-out li {
  text-decoration: line-through;
}

.hint {
  margin: 0;
  font-size: 14px;
  color: var(--bad);
}

.verdict {
  display: grid;
  gap: 6px;
  margin-top: 16px;
  padding: 16px;
  border: 1px solid var(--good);
  background: var(--good-tint);
}

.verdict.is-failed {
  border-color: var(--bad);
  background: var(--bad-tint);
}

.verdict-answer {
  margin: 0;
  font-family: var(--display);
  font-size: 24px;
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink);
}

.verdict p {
  margin: 0;
}

.verdict-explain {
  font-family: var(--serif);
  font-size: 16px;
}

/* Learn */

.learn-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  padding-block: 12px;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.learn-stats b {
  color: var(--ink);
}

.unit {
  padding-block: 18px 6px;
  border-top: 1px solid var(--rule);
}

.unit-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.unit-title {
  margin: 2px 0 10px;
  font-family: var(--display);
  font-size: 24px;
  font-weight: 500;
  color: var(--ink);
}

.unit.is-soon .unit-title,
.unit.is-soon .kicker {
  color: var(--muted);
}

.track {
  margin: 0;
  padding: 0;
  list-style: none;
}

.track li {
  position: relative;
}

.track li + li::before {
  content: '';
  position: absolute;
  left: 27px;
  top: -14px;
  height: 14px;
  border-left: 2px solid var(--rule);
}

.lesson-row {
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 0;
  margin-bottom: 14px;
  border: 0;
  background: none;
  text-align: left;
  cursor: pointer;
}

.lesson-row:disabled {
  cursor: default;
}

.node {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 2px solid var(--rule);
  border-radius: 50%;
  background: var(--paper);
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  transition:
    transform 0.15s,
    border-color 0.15s;
}

.lesson-row:not(:disabled):hover .node {
  border-color: var(--ink);
  transform: scale(1.04);
}

.lesson-row.is-next .node {
  border: 3px solid var(--claret);
  color: var(--claret);
}

.lesson-row.is-done .node {
  border-color: var(--claret);
  background: var(--claret);
  color: var(--paper);
}

.unit.is-soon .node {
  border-style: dashed;
}

.lesson-name {
  display: grid;
  gap: 1px;
}

.lesson-title {
  font-family: var(--display);
  font-size: 19px;
  color: var(--ink);
}

.unit.is-soon .lesson-title {
  color: var(--muted);
}

.start-tag {
  justify-self: start;
  padding: 1px 6px;
  background: var(--claret);
  color: var(--paper);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Lesson player */

.player {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  background: var(--paper);
}

.player-top,
.player-body,
.player-foot-inner {
  width: 100%;
  max-width: var(--column);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.player-top {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: calc(14px + env(safe-area-inset-top, 0px));
  padding-bottom: 10px;
}

.close-btn {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 0;
  background: none;
  font-size: 26px;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
}

.close-btn:hover {
  color: var(--ink);
}

.progress {
  flex: 1;
  height: 8px;
  background: var(--rule);
}

.progress span {
  display: block;
  height: 100%;
  background: var(--claret);
  transition: width 0.3s ease;
}

.hearts {
  display: flex;
  gap: 3px;
}

.heart {
  width: 18px;
  height: 18px;
  fill: var(--claret);
}

.heart.is-lost {
  fill: var(--rule);
}

.player-body {
  flex: 1;
  overflow-y: auto;
  padding-block: 20px 24px;
}

.q-kind {
  margin: 0 0 6px;
}

.q-prompt {
  margin: 0 0 20px;
  font-family: var(--display);
  font-size: clamp(22px, 5.4vw, 28px);
  font-weight: 500;
  line-height: 1.25;
  color: var(--ink);
  text-wrap: balance;
}

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

.option {
  display: grid;
  grid-template-columns: 26px 1fr;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 10px 14px;
  border: 1px solid var(--rule);
  border-bottom-width: 3px;
  background: var(--paper);
  font-size: 16px;
  text-align: left;
  cursor: pointer;
}

.option:hover:not(:disabled) {
  border-color: var(--muted);
}

.option-key {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--rule);
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
}

.option.is-selected {
  border-color: var(--ink);
  background: var(--tint);
}

.option.is-selected .option-key {
  border-color: var(--ink);
  color: var(--ink);
}

.option.is-right {
  border-color: var(--good);
  background: var(--good-tint);
}

.option.is-wrong {
  border-color: var(--bad);
  background: var(--bad-tint);
}

.option:disabled {
  cursor: default;
}

.tf-options {
  grid-template-columns: 1fr 1fr;
}

.match-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.match-col {
  display: grid;
  gap: 10px;
  align-content: start;
}

.match-grid .option {
  grid-template-columns: 1fr;
  min-height: 56px;
  font-size: 15px;
  line-height: 1.3;
}

.option.is-matched {
  border-color: var(--rule);
  background: var(--paper);
  color: var(--muted);
  opacity: 0.45;
}

.option.is-flash {
  border-color: var(--bad);
  background: var(--bad-tint);
  animation: shake 0.3s;
}

@keyframes shake {
  25% {
    transform: translateX(-4px);
  }
  75% {
    transform: translateX(4px);
  }
}

.number-row {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 320px;
}

.number-affix {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
}

.number-row .field {
  min-height: 52px;
  font-size: 22px;
  font-variant-numeric: tabular-nums;
}

.player-foot {
  border-top: 1px solid var(--rule);
  background: var(--paper);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.player-foot.is-correct {
  border-top-color: var(--good);
  background: var(--good-tint);
}

.player-foot.is-wrong {
  border-top-color: var(--bad);
  background: var(--bad-tint);
}

.player-foot-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 14px 16px;
}

.feedback {
  flex: 1 1 260px;
  display: grid;
  gap: 2px;
  min-width: 0;
}

.feedback-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.is-correct .feedback-title {
  color: var(--good);
}

.is-wrong .feedback-title {
  color: var(--bad);
}

.feedback-body {
  margin: 0;
  font-family: var(--serif);
  font-size: 15px;
}

.player-foot .btn {
  min-width: 140px;
}

.end-screen {
  display: grid;
  justify-items: start;
  gap: 12px;
  padding-block: 12vh 24px;
}

.end-screen h2 {
  margin: 0;
  font-family: var(--display);
  font-size: 40px;
  font-weight: 500;
  line-height: 1.1;
  color: var(--ink);
}

.end-figures {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  margin: 8px 0 12px;
  padding: 0;
  list-style: none;
}

.end-figures li {
  display: grid;
}

.end-figures b {
  font-family: var(--display);
  font-size: 34px;
  font-weight: 500;
  line-height: 1.1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.end-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* Tour */

.tour-scrim {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(26, 24, 23, 0.55);
}

body.is-touring .dock {
  z-index: 50;
}

body.is-touring .dock-card.is-dimmed {
  opacity: 0.3;
}

body.is-touring .dock-card.is-spotlit {
  background: var(--tint);
  border-color: var(--ink);
  box-shadow: 0 0 0 3px var(--claret);
}

.tour-card {
  position: fixed;
  left: 50%;
  bottom: calc(var(--dock-h) + 24px + env(safe-area-inset-bottom, 0px));
  z-index: 55;
  display: grid;
  gap: 8px;
  width: min(420px, calc(100% - 2 * var(--gutter)));
  padding: 20px;
  transform: translateX(-50%);
  background: var(--paper);
  border-top: 4px solid var(--claret);
  box-shadow: 0 12px 32px rgba(26, 24, 23, 0.25);
}

.tour-card.is-centred {
  bottom: auto;
  top: 50%;
  transform: translate(-50%, -50%);
}

.tour-card h2 {
  margin: 0;
  font-family: var(--display);
  font-size: 30px;
  font-weight: 500;
  line-height: 1.1;
  color: var(--ink);
}

.tour-card p {
  margin: 0;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.45;
}

.tour-dots {
  display: flex;
  gap: 6px;
}

.tour-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rule);
}

.tour-dots span.is-on {
  background: var(--claret);
}

.tour-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

@media (max-width: 420px) {
  :root {
    --dock-h: 112px;
  }

  .dock-inner {
    gap: 6px;
  }

  .dock-card {
    padding: 8px;
  }

  .dock-title {
    font-size: 15px;
  }

  .kicker {
    font-size: 11px;
  }

  .row-link,
  .fact-row {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}

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