:root {
  --ink: #15324d;
  --ink-deep: #0d263d;
  --paper: #f5f1e8;
  --cool: #e3edf2;
  --cool-deep: #cbdde6;
  --line: rgba(21, 50, 77, 0.25);
  --accent: #c65333;
  --blue: #1687d4;
  --muted: #5f6f7c;
  --health: #ead5cf;
  --science: #d8e5eb;
  --nature: #dbe4d4;
  --routes: #e8e1d3;
  --access: #ded9e8;
  --math: #efe1ac;
  --body: "Instrument Sans", sans-serif;
  --display: "Newsreader", serif;
  --page: min(1600px, calc(100vw - 64px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

a {
  color: inherit;
}

button,
summary {
  font: inherit;
}

svg {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 12px 16px;
  color: white;
  background: var(--ink-deep);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
.site-footer {
  width: var(--page);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 72px;
  border-bottom: 1px solid var(--line);
}

.site-header {
  position: sticky;
  z-index: 40;
  top: 0;
  width: 100%;
  padding-right: max(32px, calc((100vw - min(1600px, calc(100vw - 64px))) / 2));
  padding-left: max(32px, calc((100vw - min(1600px, calc(100vw - 64px))) / 2));
  background: var(--paper);
  box-shadow: 0 8px 22px rgba(13, 38, 61, 0.08);
}

.site-header span,
.site-footer span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.wordmark {
  width: max-content;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--ink);
}

.site-nav a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.site-nav a + a {
  border-left: 1px solid var(--ink);
}

.site-nav .nav-positive {
  color: white;
  background: var(--ink);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: white;
  background: var(--accent);
  outline: none;
}

.masthead {
  width: var(--page);
  min-height: 560px;
  margin: 0 auto;
  padding: clamp(72px, 10vw, 150px) 0 48px;
}

.kicker,
.feature-label,
.concern-preview > p {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.masthead h1 {
  max-width: 1070px;
  margin: 16px 0 22px;
  color: #111917;
  font-family: var(--display);
  font-size: clamp(62px, 8vw, 132px);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.91;
}

.masthead-line {
  max-width: 650px;
  margin: 0;
  color: #56605f;
  font-family: var(--display);
  font-size: clamp(24px, 2.4vw, 38px);
  line-height: 1.2;
}

.page-index {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  max-width: 760px;
  margin-top: 80px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.page-index a {
  display: flex;
  gap: 14px;
  align-items: center;
  min-height: 62px;
  padding: 12px 18px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.page-index a + a {
  border-left: 1px solid var(--line);
}

.page-index span {
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-index a:hover,
.page-index a:focus-visible {
  color: white;
  background: var(--ink);
  outline: none;
}

.page-index a:active,
.water-feature:active {
  transform: scale(0.985);
}

.page-index .is-positive {
  color: white;
  background: var(--ink);
}

.page-index .is-positive span {
  color: #8dcdf3;
}

.concerns-section {
  padding: clamp(74px, 9vw, 140px) max(32px, calc((100vw - min(1600px, calc(100vw - 64px))) / 2));
  background: var(--cool);
}

.section-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.5fr);
  gap: 40px;
  align-items: end;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--ink);
}

.section-intro .kicker {
  grid-column: 1 / -1;
}

.section-intro h2,
.positive-heading h2,
.ledger-bridge h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 0.98;
}

.section-intro h2 {
  max-width: 760px;
  font-size: clamp(56px, 7vw, 108px);
}

.section-choice {
  max-width: 460px;
  margin: 0 0 8px;
}

.section-choice p {
  margin: 0;
  font-size: clamp(19px, 1.6vw, 25px);
  line-height: 1.35;
}

.section-choice a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 52px;
  margin-top: 24px;
  padding: 10px 14px;
  color: white;
  background: var(--ink);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
}

.section-choice a:hover,
.section-choice a:focus-visible {
  background: var(--accent);
  outline: 3px solid var(--blue);
  outline-offset: 3px;
}

.section-choice a span {
  color: #8dcdf3;
  font-size: 22px;
}

.water-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  min-height: 620px;
  margin-top: 52px;
  color: white;
  background: var(--ink);
  text-decoration: none;
  overflow: hidden;
  transition: transform 130ms ease;
}

.water-feature-copy {
  display: flex;
  flex-direction: column;
  padding: clamp(38px, 5vw, 76px);
}

.feature-label {
  display: flex;
  align-items: center;
  color: #8dcdf3;
}

.feature-label svg {
  width: 25px;
  height: 25px;
  margin-right: 10px;
}

.water-feature h3 {
  max-width: 780px;
  margin: 34px 0 42px;
  font-family: var(--display);
  font-size: clamp(56px, 6vw, 96px);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 0.95;
}

.concern-best {
  max-width: 660px;
  margin: 0;
  font-size: clamp(18px, 1.5vw, 24px);
  line-height: 1.45;
}

.concern-best span {
  display: block;
  margin-bottom: 9px;
  color: #8dcdf3;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.water-answer {
  max-width: 700px;
  margin: auto 0 22px;
  padding-top: 48px;
  color: #8dcdf3;
  font-size: clamp(19px, 1.65vw, 27px);
  font-weight: 600;
  line-height: 1.35;
}

.feature-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 420px;
  padding: 16px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.5);
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  font-weight: 600;
}

.feature-link b {
  color: #8dcdf3;
  font-size: 22px;
  transition: transform 180ms ease;
}

.water-feature:hover .feature-link b,
.water-feature:focus-visible .feature-link b {
  transform: translateX(5px);
}

.water-feature:focus-visible {
  outline: 4px solid var(--blue);
  outline-offset: 4px;
}

.water-feature-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(34px, 5vw, 72px);
  color: var(--ink);
  background: #9ed3ee;
  isolation: isolate;
}

.water-feature-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.24;
  background-image: radial-gradient(circle at 1px 1px, var(--ink) 1px, transparent 0);
  background-size: 22px 22px;
}

.preview-label {
  margin: 0 0 26px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.article-preview {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(21, 50, 77, 0.42);
}

.article-preview li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 18px;
  align-items: start;
  padding: 25px 0;
  border-bottom: 1px solid rgba(21, 50, 77, 0.42);
}

.article-preview li > span {
  padding-top: 4px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.article-preview strong,
.article-preview small {
  display: block;
}

.article-preview strong {
  font-family: var(--display);
  font-size: clamp(27px, 2.3vw, 38px);
  font-weight: 500;
  line-height: 1.05;
}

.article-preview small {
  margin-top: 7px;
  font-size: 14px;
  line-height: 1.35;
}

.preview-sources {
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin: 28px 0 0;
  font-size: 14px;
  font-weight: 600;
}

.preview-sources strong {
  color: var(--accent);
  font-family: var(--display);
  font-size: 42px;
  font-weight: 500;
  line-height: 1;
}

.coming-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-top: clamp(72px, 8vw, 120px);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ink);
}

.coming-heading h3 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(34px, 4vw, 62px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
}

.coming-heading span,
.concern-preview small {
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.concerns-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--line);
}

.concern-preview {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 330px;
  padding: 30px 26px 24px;
  border-bottom: 1px solid var(--line);
}

.concern-preview:not(:nth-child(4n + 1)) {
  border-left: 1px solid var(--line);
}

.concern-preview > svg {
  width: 32px;
  height: 32px;
  margin-bottom: 42px;
  color: var(--blue);
}

.concern-preview h3 {
  margin: 9px 0 14px;
  font-family: var(--display);
  font-size: 28px;
  font-weight: 500;
  line-height: 1.04;
}

.concern-preview > span {
  color: #41576a;
  font-size: 15px;
  line-height: 1.45;
}

.concern-preview small {
  margin-top: auto;
  padding-top: 24px;
}

.ledger-bridge {
  min-height: 540px;
  padding: clamp(80px, 10vw, 160px) max(32px, calc((100vw - min(1600px, calc(100vw - 64px))) / 2));
  color: white;
  background: var(--ink-deep);
}

.ledger-bridge .kicker {
  color: #9ed3ee;
}

.ledger-bridge h2 {
  max-width: 1000px;
  margin: 22px 0 26px;
  font-size: clamp(58px, 7.5vw, 120px);
}

.ledger-bridge > p:not(.kicker) {
  max-width: 690px;
  margin: 0;
  color: #c9d8e3;
  font-size: clamp(20px, 2vw, 29px);
}

.ledger-bridge > a {
  display: flex;
  justify-content: space-between;
  max-width: 360px;
  margin-top: 66px;
  padding: 14px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.5);
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  font-weight: 600;
  text-decoration: none;
}

.receipts-section {
  padding: clamp(78px, 9vw, 140px) max(24px, calc((100vw - min(1740px, calc(100vw - 48px))) / 2));
  background: var(--paper);
}

.positive-heading {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 40px;
  align-items: end;
  padding-bottom: 44px;
  border-bottom: 1px solid #25251f;
}

.positive-heading h2 {
  margin-top: 14px;
  color: #171713;
  font-size: clamp(58px, 7vw, 112px);
}

.positive-heading h2 strong {
  color: var(--accent);
  font-weight: 500;
}

.positive-heading > p {
  max-width: 430px;
  margin: 0 0 8px;
  color: #615f57;
  font-family: var(--display);
  font-size: clamp(20px, 1.8vw, 28px);
  line-height: 1.3;
}

.filter-row {
  display: flex;
  gap: 8px;
  margin: 28px 0 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.filter-row button {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 8px 16px;
  color: #4f5049;
  background: transparent;
  border: 1px solid #9f9c90;
  border-radius: 100px;
  cursor: pointer;
  transition: color 130ms ease, background-color 130ms ease, border-color 130ms ease, transform 130ms ease;
}

.filter-row button:active {
  transform: scale(0.96);
}

.filter-row button:hover,
.filter-row button:focus-visible,
.filter-row button[aria-pressed="true"] {
  color: white;
  background: var(--ink);
  border-color: var(--ink);
  outline: none;
}

.filter-status {
  margin: 12px 0 22px;
  color: #737168;
  font-size: 13px;
}

.receipts-wall {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  align-items: start;
}

.receipt-card {
  min-width: 0;
  min-height: 220px;
  color: #32332e;
  border: 1px solid rgba(38, 45, 45, 0.28);
  box-shadow: 4px 4px 0 rgba(43, 48, 45, 0.09);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.receipt-card:not([open]) {
  height: 220px;
}

.receipt-card.health { background: var(--health); }
.receipt-card.science { background: var(--science); }
.receipt-card.nature { background: var(--nature); }
.receipt-card.routes { background: var(--routes); }
.receipt-card.access { background: var(--access); }
.receipt-card.math { background: var(--math); }

.receipt-card:not([open]):hover {
  transform: translateY(-4px);
  box-shadow: 5px 8px 0 rgba(43, 48, 45, 0.12);
}

.receipt-card[open] {
  grid-column: span 2;
  min-height: 220px;
}

.receipt-card[hidden] {
  display: none;
}

.receipt-card summary {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 218px;
  padding: 16px 14px 28px;
  cursor: pointer;
  list-style: none;
}

.receipt-card summary::-webkit-details-marker {
  display: none;
}

.receipt-card summary::after {
  content: "+";
  position: absolute;
  right: 12px;
  bottom: 8px;
  color: rgba(34, 37, 34, 0.55);
  font-size: 16px;
}

.receipt-card[open] summary {
  min-height: auto;
  padding-bottom: 12px;
}

.receipt-card[open] summary::after {
  content: "−";
}

.receipt-card .card-icon {
  width: 26px;
  height: 26px;
  margin-bottom: 20px;
  color: #51534d;
}

.receipt-topic {
  font-family: var(--display);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.05;
}

.receipt-title {
  display: -webkit-box;
  margin-top: 8px;
  color: #62625c;
  font-size: 14px;
  line-height: 1.28;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.receipt-title b {
  color: #32332e;
  font-size: 17px;
  font-variant-numeric: tabular-nums;
}

.receipt-card[open] .receipt-title {
  display: block;
  overflow: visible;
  -webkit-line-clamp: unset;
}

.receipt-back {
  padding: 0 14px 18px;
  border-top: 1px solid rgba(40, 45, 42, 0.2);
}

.receipt-back p {
  margin: 12px 0;
  font-size: 14px;
  line-height: 1.45;
}

.receipt-back a {
  display: inline-block;
  margin: 4px 10px 0 0;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  text-underline-offset: 3px;
}

.receipt-card summary:focus-visible {
  outline: 4px solid var(--blue);
  outline-offset: -4px;
}

.site-footer {
  grid-template-columns: 1fr auto auto;
  gap: 50px;
  min-height: 100px;
  border: 0;
}

.site-footer nav {
  display: flex;
  gap: 24px;
}

.site-footer nav a {
  font-size: 14px;
  text-underline-offset: 4px;
}

.egg-toast {
  position: fixed;
  z-index: 30;
  right: 22px;
  bottom: 22px;
  margin: 0;
  padding: 13px 18px;
  color: white;
  background: var(--ink-deep);
  border: 1px solid #8dcdf3;
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.18);
  font-size: 13px;
  font-weight: 600;
}

@media (max-width: 1320px) {
  .receipts-wall {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 1000px) {
  :root {
    --page: calc(100vw - 40px);
  }

  .masthead {
    min-height: 500px;
  }

  .water-feature {
    grid-template-columns: 1fr;
  }

  .water-feature-visual {
    min-height: 460px;
  }

  .concerns-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .concern-preview:not(:nth-child(4n + 1)) {
    border-left: 0;
  }

  .concern-preview:nth-child(even) {
    border-left: 1px solid var(--line);
  }

  .receipts-wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  :root {
    --page: calc(100vw - 28px);
  }

  body {
    font-size: 16px;
  }

  html {
    scroll-padding-top: 126px;
  }

  .site-header {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 10px 14px 12px;
  }

  .site-nav {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    width: 100%;
  }

  .site-nav a {
    justify-content: center;
    padding: 0 10px;
    font-size: 13px;
  }

  .masthead {
    min-height: 0;
    padding: 64px 0 34px;
  }

  .masthead h1 {
    font-size: clamp(52px, 15vw, 74px);
    line-height: 0.94;
  }

  .masthead-line {
    max-width: 340px;
    font-size: 23px;
  }

  .page-index {
    grid-template-columns: 1fr;
    margin-top: 50px;
  }

  .page-index a + a {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .concerns-section,
  .ledger-bridge {
    padding-right: 14px;
    padding-left: 14px;
  }

  .section-intro,
  .positive-heading {
    grid-template-columns: 1fr;
  }

  .section-choice {
    max-width: none;
  }

  .section-intro h2,
  .positive-heading h2,
  .ledger-bridge h2 {
    font-size: 54px;
  }

  .water-feature {
    margin-top: 34px;
  }

  .water-feature-copy {
    min-height: 620px;
    padding: 30px 24px;
  }

  .water-feature h3 {
    margin: 30px 0 34px;
    font-size: 58px;
  }

  .water-feature-visual {
    min-height: 410px;
    padding: 38px 24px;
  }

  .article-preview strong {
    font-size: 30px;
  }

  .coming-heading {
    align-items: flex-start;
    gap: 20px;
  }

  .coming-heading h3 {
    font-size: 40px;
  }

  .concern-preview {
    min-height: 320px;
    padding: 24px 18px 20px;
  }

  .concern-preview h3 {
    font-size: 25px;
  }

  .concern-preview > span {
    font-size: 14px;
  }

  .ledger-bridge {
    min-height: 530px;
  }

  .receipts-section {
    padding-right: 8px;
    padding-left: 8px;
  }

  .positive-heading {
    padding-right: 6px;
    padding-left: 6px;
  }

  .filter-row {
    margin-right: -8px;
    margin-left: -8px;
    padding: 0 8px 8px;
  }

  .filter-status {
    margin-left: 6px;
  }

  .receipts-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .receipt-card,
  .receipt-card[open] {
    min-height: 214px;
  }

  .receipt-card:not([open]) {
    height: 214px;
  }

  .receipt-card[open] {
    grid-column: 1 / -1;
  }

  .receipt-card summary {
    min-height: 212px;
    padding: 14px 12px 26px;
  }

  .receipt-topic {
    font-size: 18px;
  }

  .receipt-title {
    font-size: 13px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 30px 0;
  }

  .site-footer nav {
    justify-content: space-between;
  }

  .site-footer nav a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

}