:root {
  --ink: #152430;
  --muted: #5e6b75;
  --paper: #ffffff;
  --canvas: #f5f6f2;
  --navy: #153d4b;
  --navy-deep: #0d2b36;
  --teal: #1d7a77;
  --teal-light: #dcefed;
  --coral: #e46f51;
  --sand: #eee8dc;
  --line: #d8dedc;
  --shadow: 0 18px 45px rgba(13, 43, 54, 0.12);
  --radius-large: 1.5rem;
  --radius-medium: 1rem;
  --content-width: 76rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: Inter, Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: inherit;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 14ch;
  margin-bottom: 1.5rem;
  font-size: clamp(3rem, 7vw, 6.4rem);
  font-weight: 720;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 700;
}

h3 {
  margin-bottom: 0.7rem;
  font-size: 1.35rem;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  padding: 0.7rem 1rem;
  color: white;
  background: var(--navy-deep);
  border-radius: 0.5rem;
  transform: translateY(-160%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  color: white;
  background: rgba(13, 43, 54, 0.98);
  box-shadow: 0 8px 30px rgba(13, 43, 54, 0.14);
  backdrop-filter: blur(16px);
}

.experience-navigation {
  overflow-x: auto;
  scrollbar-width: thin;
}

.experience-navigation__list {
  display: grid;
  width: min(100% - 2rem, var(--content-width));
  min-width: 54rem;
  margin: 0 auto;
  padding: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  list-style: none;
}

.experience-navigation__item {
  position: relative;
  display: flex;
  min-height: 4.25rem;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  color: #d6e3e6;
  border-right: 1px solid rgba(255, 255, 255, 0.09);
  text-decoration: none;
  transition: color 160ms ease, background 160ms ease;
}

.experience-navigation li:first-child .experience-navigation__item {
  border-left: 1px solid rgba(255, 255, 255, 0.09);
}

.experience-navigation__item::after {
  position: absolute;
  right: 1rem;
  bottom: 0;
  left: 1rem;
  height: 0.18rem;
  content: "";
  background: transparent;
  border-radius: 1rem 1rem 0 0;
}

.experience-navigation__item:not(.experience-navigation__item--disabled):hover,
.experience-navigation__item:not(.experience-navigation__item--disabled):focus-visible {
  color: white;
  background: rgba(255, 255, 255, 0.06);
}

.experience-navigation__item.is-active {
  color: white;
  background: rgba(29, 122, 119, 0.2);
}

.experience-navigation__item.is-active::after {
  background: var(--coral);
}

.experience-navigation__item--disabled {
  color: #b9cbd0;
  cursor: default;
}

.site-brand__mark {
  display: grid;
  width: 2.6rem;
  height: 2.6rem;
  place-items: center;
  color: var(--navy-deep);
  background: var(--teal-light);
  border-radius: 0.75rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.18;
}

.site-brand__text strong {
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.site-brand__text small {
  margin-top: 0.18rem;
  color: #b9d1d7;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.main-navigation {
  overflow-x: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  scrollbar-width: thin;
}

.main-navigation__list {
  display: grid;
  width: min(100% - 2rem, var(--content-width));
  min-width: 57rem;
  margin: 0 auto;
  padding: 0;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  list-style: none;
}

.main-navigation__link {
  position: relative;
  display: flex;
  min-height: 4.2rem;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 0.9rem;
  color: #d6e3e6;
  border-right: 1px solid rgba(255, 255, 255, 0.09);
  text-decoration: none;
  transition: color 160ms ease, background 160ms ease;
}

.main-navigation li:first-child .main-navigation__link {
  border-left: 1px solid rgba(255, 255, 255, 0.09);
}

.main-navigation__link::after {
  position: absolute;
  right: 0.9rem;
  bottom: 0;
  left: 0.9rem;
  height: 0.22rem;
  content: "";
  background: transparent;
  border-radius: 1rem 1rem 0 0;
}

.main-navigation__link:hover,
.main-navigation__link:focus-visible {
  color: white;
  background: rgba(255, 255, 255, 0.06);
}

.main-navigation__link.is-active {
  color: white;
  background: rgba(29, 122, 119, 0.24);
}

.main-navigation__link.is-active::after {
  background: var(--coral);
}

.main-navigation__number {
  display: grid;
  flex: 0 0 auto;
  width: 1.8rem;
  height: 1.8rem;
  place-items: center;
  color: var(--navy-deep);
  background: #bdd7d8;
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 800;
}

.main-navigation__link.is-active .main-navigation__number {
  color: white;
  background: var(--coral);
}

.main-navigation__title {
  font-size: 0.86rem;
  font-weight: 680;
  line-height: 1.2;
}

.page-shell {
  min-height: 65vh;
}

.page-shell--with-subnav {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
}

.page-content {
  min-width: 0;
}

.subtopic-sidebar {
  position: relative;
  z-index: 50;
}

.subtopic-sidebar__panel {
  position: sticky;
  top: 4.5rem;
  width: 4.5rem;
  min-height: calc(100vh - 4.5rem);
  overflow: hidden;
  color: white;
  background: var(--navy);
  box-shadow: 10px 0 30px rgba(13, 43, 54, 0.08);
  transition: width 220ms ease, box-shadow 220ms ease;
}

.subtopic-sidebar:hover .subtopic-sidebar__panel,
.subtopic-sidebar:focus-within .subtopic-sidebar__panel {
  width: 19rem;
  box-shadow: 14px 0 35px rgba(13, 43, 54, 0.18);
}

.subtopic-sidebar__checkbox {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.subtopic-sidebar__toggle {
  display: flex;
  width: 19rem;
  min-height: 4.8rem;
  align-items: center;
  gap: 0.8rem;
  padding: 0.9rem 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  cursor: pointer;
}

.subtopic-sidebar__step {
  display: grid;
  flex: 0 0 auto;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  color: var(--navy-deep);
  background: var(--teal-light);
  border-radius: 50%;
  font-weight: 800;
}

.subtopic-sidebar__toggle-title,
.subtopic-sidebar__toggle-hint,
.subtopic-navigation__title {
  opacity: 0;
  transition: opacity 140ms ease 40ms;
}

.subtopic-sidebar__toggle-title {
  font-weight: 750;
  white-space: nowrap;
}

.subtopic-sidebar__toggle-hint {
  margin-left: auto;
  color: #b9d1d7;
  font-size: 0.72rem;
  text-transform: uppercase;
}

.subtopic-sidebar:hover .subtopic-sidebar__toggle-title,
.subtopic-sidebar:hover .subtopic-sidebar__toggle-hint,
.subtopic-sidebar:hover .subtopic-navigation__title,
.subtopic-sidebar:focus-within .subtopic-sidebar__toggle-title,
.subtopic-sidebar:focus-within .subtopic-sidebar__toggle-hint,
.subtopic-sidebar:focus-within .subtopic-navigation__title {
  opacity: 1;
}

.subtopic-navigation ol {
  width: 19rem;
  margin: 0;
  padding: 0.75rem 0;
  list-style: none;
}

.subtopic-navigation__link {
  display: flex;
  min-height: 3.8rem;
  align-items: center;
  gap: 0.8rem;
  padding: 0.55rem 0.85rem;
  color: #d8e6e8;
  text-decoration: none;
  transition: color 160ms ease, background 160ms ease;
}

.subtopic-navigation__link:hover,
.subtopic-navigation__link:focus-visible,
.subtopic-navigation__link.is-active {
  color: white;
  background: rgba(255, 255, 255, 0.1);
}

.subtopic-navigation__link.is-active {
  box-shadow: inset 0.25rem 0 var(--coral);
}

.subtopic-navigation__number {
  display: grid;
  flex: 0 0 auto;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  color: #d9eeee;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 800;
}

.subtopic-navigation__link.is-active .subtopic-navigation__number {
  color: white;
  background: var(--coral);
  border-color: var(--coral);
}

.subtopic-navigation__title {
  font-size: 0.9rem;
  font-weight: 650;
  white-space: nowrap;
}

.hero,
.section-block,
.journey-navigation {
  width: min(100% - 3rem, var(--content-width));
  margin-right: auto;
  margin-left: auto;
}

.hero {
  position: relative;
  padding: clamp(4rem, 8vw, 7.5rem) 0 clamp(3rem, 6vw, 5.5rem);
}

.hero::before {
  position: absolute;
  top: 2rem;
  right: 1rem;
  width: clamp(8rem, 20vw, 17rem);
  height: clamp(8rem, 20vw, 17rem);
  content: "";
  background: radial-gradient(circle at 35% 35%, var(--teal-light), transparent 68%);
  border: 1px solid rgba(29, 122, 119, 0.15);
  border-radius: 50%;
  pointer-events: none;
}

.hero__eyebrow,
.section-heading__eyebrow {
  margin-bottom: 0.8rem;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero__lead {
  max-width: 52rem;
  margin-bottom: 2rem;
  color: #40515d;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  line-height: 1.55;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  min-height: 3.25rem;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 750;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button--primary {
  color: white;
  background: var(--navy);
  box-shadow: 0 10px 25px rgba(21, 61, 75, 0.2);
}

.button--primary:hover,
.button--primary:focus-visible {
  background: var(--navy-deep);
  box-shadow: 0 14px 28px rgba(21, 61, 75, 0.26);
}

.button--secondary {
  color: var(--navy);
  background: transparent;
  border-color: #adc0c3;
}

.section-block {
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.section-block--compact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.section-block--tinted {
  position: relative;
}

.section-block--tinted::before {
  position: absolute;
  z-index: -1;
  top: 0;
  right: -1rem;
  bottom: 0;
  left: -1rem;
  content: "";
  background: var(--sand);
  border-radius: var(--radius-large);
}

.section-heading {
  max-width: 54rem;
  margin-bottom: 2.5rem;
}

.section-heading > p:last-child {
  color: var(--muted);
  font-size: 1.08rem;
}

.topic-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.topic-grid--five {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.topic-card {
  display: flex;
  min-height: 19rem;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-medium);
  box-shadow: 0 4px 16px rgba(13, 43, 54, 0.04);
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.topic-card:hover,
.topic-card:focus-visible {
  border-color: #88b8b5;
  box-shadow: var(--shadow);
  transform: translateY(-5px);
}

.topic-card__number {
  display: grid;
  width: 2.8rem;
  height: 2.8rem;
  margin-bottom: 2rem;
  place-items: center;
  color: white;
  background: var(--teal);
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 800;
}

.topic-card p {
  color: var(--muted);
}

.topic-card__action {
  margin-top: auto;
  padding-top: 1.5rem;
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.outcome-panel {
  display: grid;
  align-items: start;
  gap: 2.5rem;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
}

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

.check-list li {
  position: relative;
  padding: 0.95rem 0 0.95rem 2.5rem;
  border-bottom: 1px solid rgba(21, 61, 75, 0.14);
}

.check-list li::before {
  position: absolute;
  top: 1rem;
  left: 0;
  display: grid;
  width: 1.55rem;
  height: 1.55rem;
  place-items: center;
  color: white;
  content: "✓";
  background: var(--teal);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 900;
}

.result-callout {
  max-width: 49rem;
  padding: 1.5rem 1.7rem;
  background: var(--teal-light);
  border-left: 0.3rem solid var(--teal);
  border-radius: 0 var(--radius-medium) var(--radius-medium) 0;
}

.result-callout__label {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--teal);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.result-callout p {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 650;
}

.development-note {
  padding: clamp(2rem, 5vw, 4rem);
  background: var(--paper);
  border: 1px dashed #9dafb2;
  border-radius: var(--radius-large);
}

.development-note > span {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--coral);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.development-note p {
  max-width: 50rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.prose-section__lead {
  max-width: 58rem;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.6;
}

.principle-callout {
  max-width: 58rem;
  margin-top: 2.5rem;
  padding: 1.7rem;
  color: white;
  background: var(--navy);
  border-radius: var(--radius-medium);
}

.principle-callout strong {
  display: block;
  margin-bottom: 0.65rem;
  font-size: 1.18rem;
}

.principle-callout p {
  margin-bottom: 0;
  color: #d5e5e7;
}

.category-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.category-card {
  padding: 1.6rem;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius-medium);
}

.category-card--wide {
  grid-column: 1 / -1;
}

.category-card > span {
  display: block;
  margin-bottom: 1.5rem;
  color: var(--coral);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.category-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.layer-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.layer-grid article {
  padding: 1.7rem;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(21, 61, 75, 0.12);
  border-radius: var(--radius-medium);
}

.layer-grid__number {
  display: block;
  margin-bottom: 1.4rem;
  color: var(--teal);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.layer-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.supporting-note {
  max-width: 56rem;
  margin: 1.5rem 0 0;
  padding-left: 1.2rem;
  color: #4f5e65;
  border-left: 0.2rem solid var(--coral);
}

.journey-navigation {
  display: grid;
  gap: 0.75rem;
  padding: 1rem 0 5rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.journey-navigation__item {
  display: flex;
  min-height: 7rem;
  flex-direction: column;
  justify-content: space-between;
  padding: 1rem;
  background: white;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.journey-navigation__item:not(.journey-navigation__item--disabled):hover,
.journey-navigation__item:not(.journey-navigation__item--disabled):focus-visible {
  border-color: #88b8b5;
  box-shadow: 0 8px 22px rgba(13, 43, 54, 0.08);
  transform: translateY(-3px);
}

.journey-navigation__item span {
  color: var(--teal);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.journey-navigation__item strong {
  font-size: 0.95rem;
  line-height: 1.25;
}

.journey-navigation__item--next {
  text-align: right;
}

.journey-navigation__item--disabled {
  color: #99a2a6;
  background: #ecefed;
  border-color: #e1e5e3;
  cursor: not-allowed;
}

.journey-navigation__item--disabled span {
  color: #9ba5a7;
}

.site-footer {
  color: #d4e2e5;
  background: var(--navy-deep);
}

.site-footer__inner {
  display: flex;
  width: min(100% - 3rem, var(--content-width));
  margin: 0 auto;
  padding: 2.5rem 0;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
}

.site-footer p {
  margin: 0;
}

.site-footer p:last-child {
  max-width: 38rem;
  color: #9db7bd;
  text-align: right;
}

@media (max-width: 72rem) {
  .topic-grid--five {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .experience-navigation__list {
    width: max-content;
    min-width: 0;
    grid-template-columns: repeat(3, 18rem);
  }

  .main-navigation__list {
    width: max-content;
    min-width: 0;
    grid-template-columns: repeat(5, 11.5rem);
  }
}

@media (max-width: 52rem) {
  .site-header {
    position: relative;
  }

  .page-shell--with-subnav {
    display: block;
  }

  .subtopic-sidebar__panel {
    position: static;
    width: 100%;
    min-height: 0;
    overflow: visible;
    box-shadow: none;
  }

  .subtopic-sidebar:hover .subtopic-sidebar__panel,
  .subtopic-sidebar:focus-within .subtopic-sidebar__panel {
    width: 100%;
    box-shadow: none;
  }

  .subtopic-sidebar__toggle {
    width: 100%;
    min-height: 3.8rem;
    padding: 0.5rem 1rem;
  }

  .subtopic-sidebar__step {
    width: 2.35rem;
    height: 2.35rem;
  }

  .subtopic-sidebar__toggle-title,
  .subtopic-sidebar__toggle-hint {
    opacity: 1;
  }

  .subtopic-navigation {
    display: none;
  }

  .subtopic-sidebar__checkbox:checked ~ .subtopic-navigation {
    display: block;
  }

  .subtopic-navigation ol {
    width: 100%;
  }

  .subtopic-navigation__title {
    opacity: 1;
  }

  .subtopic-navigation__link {
    padding-right: 1rem;
    padding-left: 1rem;
  }

  .outcome-panel,
  .layer-grid {
    grid-template-columns: 1fr;
  }

  .journey-navigation {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-grid--five {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer__inner {
    display: block;
  }

  .site-footer p:last-child {
    margin-top: 0.7rem;
    text-align: left;
  }
}

@media (max-width: 38rem) {
  .hero,
  .section-block,
  .journey-navigation,
  .site-footer__inner {
    width: min(100% - 2rem, var(--content-width));
  }

  .hero {
    padding-top: 3.5rem;
  }

  .hero::before {
    opacity: 0.55;
  }

  h1 {
    font-size: clamp(2.7rem, 15vw, 4.2rem);
  }

  .topic-grid,
  .topic-grid--five,
  .category-grid {
    grid-template-columns: 1fr;
  }

  .category-card--wide {
    grid-column: auto;
  }

  .topic-card {
    min-height: 15rem;
  }

  .journey-navigation {
    gap: 0.55rem;
  }

  .journey-navigation__item {
    min-height: 6.6rem;
    padding: 0.85rem;
  }

  .journey-navigation__item span {
    font-size: 0.62rem;
  }

  .journey-navigation__item strong {
    font-size: 0.84rem;
  }
}

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

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