:root {
  color-scheme: light;
  --paper: #f9f9f5;
  --ink: #142e36;
  --muted: #4a5e64;
  --rule: #c9d2ce;
  --sea: #235b5a;
  --pale: #e8efea;
  --amber: #ffcf98;
  --panel-radius: 1.25rem;
  --control-radius: 0.65rem;
  font-family: system-ui, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
body {
  margin: 0;
}
a {
  color: inherit;
  text-underline-offset: 0.24em;
}
a:focus-visible,
summary:focus-visible {
  outline: 3px solid #a95227;
  outline-offset: 5px;
}
p,
h1,
h2,
h3,
figure,
dl,
dd {
  margin: 0;
}
.wrap {
  width: min(100% - 6rem, 79rem);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 1rem;
  transform: translateY(-120%);
  background: var(--ink);
  color: white;
  padding: 0.6rem 1rem;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 5.1rem;
  gap: 1rem;
  border-bottom: 1px solid var(--rule);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  font-weight: 730;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.brand img {
  flex: none;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2.8vw, 2rem);
  font-size: 0.91rem;
  font-weight: 650;
}

.nav-support {
  text-decoration: none;
}
.nav-support:hover {
  text-decoration: underline;
}

.sign-in {
  padding: 0.58rem 0.85rem;
  border: 1px solid var(--ink);
  border-radius: var(--control-radius);
  text-decoration: none;
  text-align: center;
}

.sign-in:hover {
  background: var(--ink);
  color: white;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  align-items: center;
  gap: clamp(2rem, 5.6vw, 5.6rem);
  padding-top: clamp(2.25rem, 5vw, 4.8rem);
}

h1 {
  max-width: 14ch;
  font-size: clamp(3rem, 5.2vw, 5rem);
  font-weight: 760;
  line-height: 1.02;
  letter-spacing: -0.057em;
  text-wrap: balance;
}

.intro {
  max-width: 34ch;
  margin-top: clamp(1.1rem, 2vw, 1.65rem);
  color: var(--muted);
  font-size: clamp(1.05rem, 1.6vw, 1.29rem);
  line-height: 1.52;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem 1.1rem;
  margin-top: 1.5rem;
}

.hero-actions .button {
  margin-top: 0;
}

.sample-link {
  color: var(--sea);
  font-weight: 700;
  padding-block: 0.35rem;
}

.chart-figure {
  overflow: hidden;
  background: #102d38;
  border: 1px solid #244550;
  border-radius: var(--panel-radius);
  box-shadow: 0 1rem 2.5rem -1.65rem #142e3670;
}

.chart-art {
  position: relative;
}

.front-sweep {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  fill: none;
  stroke: #fff1c9;
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-dasharray: 11 89;
  opacity: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .front-sweep {
    animation: front-sweep 1.85s 0.2s ease-out both;
  }

  .button,
  .sign-in,
  .sample-marker {
    transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
  }
}

@keyframes front-sweep {
  0% { stroke-dashoffset: 11; opacity: 0; }
  16% { opacity: 0.88; }
  76% { opacity: 0.74; }
  100% { stroke-dashoffset: -100; opacity: 0; }
}

.chart-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.chart-figure figcaption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.65rem 0.9rem;
  border-top: 1px solid #345561;
  color: #d7e4dc;
  font-size: 0.78rem;
}

.reading,
.pass,
.support {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
  column-gap: clamp(1.5rem, 8vw, 8rem);
}

.reading {
  align-items: start;
  padding-block: clamp(2.5rem, 5.3vw, 5.25rem);
}

h2 {
  max-width: 17ch;
  font-size: clamp(2rem, 3.8vw, 3.75rem);
  font-weight: 775;
  line-height: 1.04;
  letter-spacing: -0.05em;
  text-wrap: balance;
}

.reading-intro p,
.support p,
.pass-offer p {
  max-width: 43ch;
  margin-top: 0.9rem;
  color: var(--muted);
}

.cadence {
  border-top: 1px solid var(--rule);
}

.cadence div {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.15rem 1rem;
  padding: 0.79rem 0;
  border-bottom: 1px solid var(--rule);
}

.cadence dt {
  font-weight: 750;
}
.cadence dd {
  color: var(--muted);
}

.sample-chart {
  grid-column: 1 / -1;
  margin-top: clamp(1.8rem, 4.1vw, 3.4rem);
  border: 1px solid #284650;
  border-radius: var(--panel-radius);
  overflow: hidden;
  background: #102d38;
  color: #edf4ee;
  scroll-margin-block-start: 1rem;
}

.sample-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.75rem clamp(0.85rem, 2vw, 1.25rem);
  border-bottom: 1px solid #385661;
}

.sample-heading span,
.sample-readings dt,
.sample-readings p {
  color: #bed0cf;
  font-size: 0.85rem;
}

.sample-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.37fr);
  align-items: center;
}

.sample-map {
  position: relative;
  border-right: 1px solid #385661;
}

.sample-map img {
  display: block;
  width: 100%;
  height: auto;
}

.sample-option {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  clip-path: inset(50%);
}

.sample-marker {
  position: absolute;
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  transform: translate(-50%, -50%);
  border: 1px solid #b2d0ca;
  border-radius: 50%;
  background: #102d38;
  color: #edf4ee;
  font-weight: 750;
  cursor: pointer;
}

.sample-marker[for='sample-a'] { left: 26%; top: 33%; }
.sample-marker[for='sample-b'] { left: 53.5%; top: 48%; }
.sample-marker[for='sample-c'] { left: 73%; top: 72%; }

.sample-marker:hover {
  background: #235b5a;
}

#sample-a:checked ~ .sample-map [for='sample-a'],
#sample-b:checked ~ .sample-map [for='sample-b'],
#sample-c:checked ~ .sample-map [for='sample-c'] {
  border-color: var(--amber);
  background: var(--amber);
  color: var(--ink);
}

#sample-a:focus-visible ~ .sample-map [for='sample-a'],
#sample-b:focus-visible ~ .sample-map [for='sample-b'],
#sample-c:focus-visible ~ .sample-map [for='sample-c'] {
  outline: 2px solid white;
  outline-offset: 4px;
}

.sample-values {
  display: none;
}

#sample-a:checked ~ .sample-readings .sample-values-a,
#sample-b:checked ~ .sample-readings .sample-values-b,
#sample-c:checked ~ .sample-readings .sample-values-c {
  display: block;
}

.sample-readings {
  padding: clamp(0.95rem, 2.8vw, 2rem);
}

.sample-instruction {
  margin-bottom: 0.65rem;
}

.sample-readings h3 {
  font-size: 1.1rem;
}

.sample-readings dl {
  margin-block: 0.65rem 1rem;
  border-top: 1px solid #385661;
}

.sample-readings dl div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.15rem 0.8rem;
  padding-block: 0.55rem;
  border-bottom: 1px solid #385661;
}

.sample-readings dd {
  font-weight: 740;
  font-variant-numeric: tabular-nums;
}

.pass {
  padding: clamp(1.8rem, 4.4vw, 4rem);
  margin-bottom: clamp(2.5rem, 6vw, 6rem);
  background: var(--pale);
  border-radius: var(--panel-radius);
}

.pass h2 {
  font-size: clamp(1.95rem, 3.6vw, 3.5rem);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  margin-top: 1.22rem;
  padding: 0.65rem 1.1rem;
  background: var(--ink);
  border-radius: var(--control-radius);
  color: white;
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  background: #28505a;
}
.pass-flow {
  align-self: center;
}
.pass-flow h3 {
  font-size: 1.27rem;
  font-weight: 750;
}

.access-steps {
  margin-block: 0.7rem 1rem;
  padding-left: 1.2rem;
}

.access-steps li {
  padding-block: 0.3rem;
}
.access-steps li::marker {
  color: var(--sea);
  font-weight: 750;
}
.pass-flow > a {
  font-weight: 700;
}

.support {
  padding-bottom: clamp(2.5rem, 6vw, 6rem);
}
.support h2 {
  font-size: clamp(2rem, 3.6vw, 3.5rem);
}

.email-link {
  display: inline-block;
  margin-top: 0.85rem;
  color: var(--sea);
  font-weight: 750;
  overflow-wrap: anywhere;
}

.faq {
  border-top: 1px solid var(--rule);
}
.faq details {
  padding-block: 0.8rem;
  border-bottom: 1px solid var(--rule);
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
}
.faq summary::marker {
  color: var(--sea);
}
.faq p {
  max-width: 56ch;
  margin-top: 0.55rem;
  font-size: 0.95rem;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1.25rem;
  padding-block: 1.25rem 2rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.84rem;
}

.footer-brand {
  color: var(--ink);
  font-weight: 760;
}
.site-footer a {
  margin-left: auto;
}

@media (max-width: 59rem) {
  .wrap {
    width: min(100% - 3.6rem, 79rem);
  }
  .hero {
    gap: 1.75rem;
  }
}

@media (max-width: 51rem) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 43rem) {
  .wrap {
    width: calc(100% - 2rem);
  }
  .site-header {
    min-height: 4.25rem;
  }
  h1 {
    max-width: 15ch;
    font-size: clamp(2.55rem, 10.2vw, 4rem);
    line-height: 1.03;
    letter-spacing: -0.06em;
  }
  h2 {
    line-height: 1.1;
    letter-spacing: -0.045em;
  }
  .reading,
  .pass,
  .support {
    grid-template-columns: minmax(0, 1fr);
  }
  .intro {
    max-width: 43ch;
  }
  .reading,
  .pass,
  .support {
    row-gap: 1.6rem;
  }
  .sample-chart {
    margin-top: 0;
  }
  .sample-body {
    grid-template-columns: minmax(0, 1fr);
  }
  .sample-map {
    border-right: 0;
    border-bottom: 1px solid #385661;
  }
  .site-footer a {
    margin-left: 0;
  }
}

@media (max-width: 26rem) {
  .site-header {
    gap: 0.48rem;
  }
  .brand {
    font-size: 1.13rem;
    white-space: nowrap;
    gap: 0.35rem;
  }
  .brand img {
    width: 1.65rem;
    height: 1.65rem;
  }
  .site-header nav {
    gap: 0.48rem;
    font-size: 0.82rem;
  }
  .nav-support {
    padding-block: 0.65rem;
  }
  .sign-in {
    padding-inline: 0.44rem;
    white-space: nowrap;
  }
  .chart-figure figcaption {
    padding-inline: 0.65rem;
  }
}

@media (max-width: 22rem) {
  .nav-support {
    display: none;
  }
}