:root {
  color-scheme: light;
  --ink: #10231d;
  --ink-soft: #385048;
  --paper: #f6f4ea;
  --paper-bright: #fffef8;
  --line: #cbd2c9;
  --accent: #d8f36b;
  --accent-dark: #526300;
  --panel: #e9eee5;
  --max: 72rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 0.08em;
}

a:hover {
  text-decoration-thickness: 0.14em;
}

a:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 4px;
}

.shell {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
}

.site-header .shell {
  min-height: 5.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  font-weight: 720;
  letter-spacing: -0.025em;
  font-size: 1.18rem;
}

.brand img {
  width: 2.7rem;
  height: 2.7rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.55rem 1.4rem;
  font-size: 0.91rem;
  font-weight: 620;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover {
  text-decoration: underline;
}

.hero {
  min-height: 42rem;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(17rem, 0.55fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: center;
  padding-block: clamp(5rem, 11vw, 9rem);
}

.eyebrow,
.section-kicker,
.meta-label {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.73rem;
  font-weight: 760;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 13ch;
  margin-bottom: 1.6rem;
  font-size: clamp(3.2rem, 8vw, 7.2rem);
  line-height: 0.93;
  letter-spacing: -0.065em;
  font-weight: 730;
}

.hero-lede {
  max-width: 41rem;
  margin-bottom: 2rem;
  color: var(--ink-soft);
  font-size: clamp(1.12rem, 2vw, 1.38rem);
  line-height: 1.55;
}

.hero-formula {
  max-width: 41rem;
  margin: 0 0 2rem;
  padding: 1.25rem 1.4rem;
  border: 1px solid var(--line);
  border-left: 0.38rem solid var(--accent);
  border-radius: 0.85rem;
  background: var(--paper-bright);
}

.formula-expression {
  margin-bottom: 0.35rem;
  font-family: "DejaVu Serif", Georgia, serif;
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.formula-expression i,
.definition i {
  font-family: "DejaVu Serif", Georgia, serif;
}

.formula-expression sub,
.definition sub {
  font-size: 0.58em;
}

.formula-meaning {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 0.91rem;
  line-height: 1.5;
}

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

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 3.15rem;
  padding: 0.75rem 1.1rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper-bright);
  font-size: 0.92rem;
  font-weight: 720;
  text-decoration: none;
}

.button:hover {
  background: #1d3930;
}

.button.secondary {
  background: transparent;
  color: var(--ink);
}

.button.secondary:hover {
  background: var(--panel);
}

.interval-figure {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  max-width: 23rem;
  justify-self: end;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--paper-bright);
}

.interval-mark {
  width: 58%;
  height: auto;
}

.section {
  padding-block: clamp(4rem, 9vw, 7rem);
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(12rem, 0.55fr) minmax(0, 1.45fr);
  gap: 2rem;
  align-items: start;
  margin-bottom: 3.5rem;
}

h2 {
  margin-bottom: 1.2rem;
  font-size: clamp(2.15rem, 5vw, 4.2rem);
  line-height: 1.03;
  letter-spacing: -0.05em;
}

.section-intro {
  max-width: 44rem;
  color: var(--ink-soft);
  font-size: 1.15rem;
}

.definition-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: var(--line);
}

.definition {
  min-height: 18rem;
  padding: clamp(1.5rem, 3.2vw, 2.5rem);
  background: var(--paper-bright);
}

.definition-number {
  display: inline-block;
  margin-bottom: 3.5rem;
  color: var(--accent-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
}

.definition h3 {
  margin-bottom: 0.7rem;
  font-size: 1.3rem;
  letter-spacing: -0.025em;
}

.definition p {
  margin-bottom: 0;
  color: var(--ink-soft);
}

.paper-card {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(16rem, 0.75fr);
  gap: clamp(2rem, 7vw, 6rem);
  padding: clamp(2rem, 5vw, 4rem);
  border-radius: 1.2rem;
  background: var(--ink);
  color: var(--paper-bright);
}

.paper-card h2 {
  max-width: 12ch;
}

.paper-card p {
  max-width: 41rem;
  color: #c8d2cc;
}

.paper-card .button {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}

.paper-card .button.secondary {
  background: transparent;
  border-color: #81928b;
  color: var(--paper-bright);
}

.paper-card .button.secondary:hover {
  background: #1d3930;
}

.paper-meta {
  align-self: end;
  margin: 0;
  border-top: 1px solid #40534c;
}

.paper-meta div {
  display: grid;
  grid-template-columns: 6.6rem 1fr;
  gap: 1rem;
  padding-block: 0.8rem;
  border-bottom: 1px solid #40534c;
}

.paper-meta dt,
.paper-meta dd {
  margin: 0;
}

.paper-meta dt {
  color: #9fb0a9;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.paper-meta dd {
  font-size: 0.92rem;
}

.status-grid {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: clamp(2rem, 7vw, 6rem);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 1.2rem;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.status-badge::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent-dark);
}

.status-copy {
  max-width: 44rem;
}

.status-copy strong {
  color: var(--ink);
}

.site-footer {
  padding-block: 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.site-footer .shell {
  display: flex;
  justify-content: space-between;
  gap: 1rem 2rem;
  flex-wrap: wrap;
}

.site-footer p {
  margin-bottom: 0;
}

.flyer-hero h1 {
  max-width: 11ch;
}

.hero-symbol {
  justify-self: end;
  width: 100%;
  max-width: 23rem;
}

.hero-symbol .interval-figure {
  width: 100%;
}

.hero-symbol > p {
  margin: 1rem 0 0;
  color: var(--ink-soft);
  text-align: center;
  font-size: 0.78rem;
  font-weight: 720;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.formula-section {
  background: var(--panel);
}

.formula-stack {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: var(--line);
}

.formula-row {
  display: grid;
  grid-template-columns: minmax(9rem, 0.55fr) minmax(13rem, 0.7fr) minmax(17rem, 1.25fr);
  gap: 1.5rem;
  align-items: center;
  padding: clamp(1.4rem, 3vw, 2.2rem);
  background: var(--paper-bright);
}

.formula-row + .formula-row {
  border-top: 1px solid var(--line);
}

.formula-row-primary {
  box-shadow: inset 0.4rem 0 0 var(--accent);
}

.formula-row .formula-expression {
  margin: 0;
  white-space: nowrap;
}

.formula-row > p:last-child {
  margin: 0;
  color: var(--ink-soft);
}

.formula-name {
  margin: 0;
  color: var(--accent-dark);
  font-size: 0.72rem;
  font-weight: 760;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.doctrine-section {
  padding-block: clamp(2rem, 5vw, 4rem);
}

.doctrine-panel {
  padding: clamp(2rem, 6vw, 5.5rem);
  border-radius: 1.2rem;
  background: var(--ink);
  color: var(--paper-bright);
}

.doctrine-panel .section-kicker {
  color: var(--accent);
}

.doctrine-panel h2 {
  max-width: 17ch;
  margin-bottom: 2rem;
}

.doctrine-panel > p:last-child {
  max-width: 42rem;
  margin-bottom: 0;
  color: #c8d2cc;
  font-family: "DejaVu Serif", Georgia, serif;
  font-size: clamp(1.15rem, 2.5vw, 1.55rem);
  font-style: italic;
}

.destination-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: var(--line);
}

.destination-card {
  min-height: 17rem;
  padding: clamp(1.5rem, 3.5vw, 2.5rem);
  background: var(--paper-bright);
}

.destination-card > span {
  display: block;
  margin-bottom: 3.5rem;
  color: var(--accent-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.74rem;
}

.destination-card h3 {
  margin-bottom: 0.65rem;
  font-size: 1.3rem;
  letter-spacing: -0.03em;
}

.destination-card p {
  margin-bottom: 0;
  color: var(--ink-soft);
}

.destination-card-warning {
  background: #eef4ca;
}

.intensity-section {
  background: var(--ink);
  color: var(--paper-bright);
}

.intensity-grid {
  display: grid;
  grid-template-columns: minmax(15rem, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 8vw, 7rem);
}

.intensity-section .section-kicker {
  color: var(--accent);
}

.intensity-copy {
  max-width: 43rem;
  align-self: end;
}

.intensity-copy p {
  color: #c8d2cc;
  font-size: 1.08rem;
}

.intensity-copy strong {
  color: var(--paper-bright);
}

@media (max-width: 760px) {
  .site-header .shell {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 1rem;
    gap: 0.8rem;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero,
  .section-heading,
  .paper-card,
  .status-grid,
  .formula-row,
  .intensity-grid {
    grid-template-columns: 1fr;
  }

  .hero-symbol {
    justify-self: start;
    width: min(75vw, 18rem);
  }

  .hero {
    min-height: auto;
    padding-top: 4.5rem;
  }

  .interval-figure {
    width: min(75vw, 18rem);
    justify-self: start;
  }

  .definition-grid {
    grid-template-columns: 1fr;
  }

  .destination-grid {
    grid-template-columns: 1fr;
  }

  .destination-card {
    min-height: auto;
  }

  .destination-card > span {
    margin-bottom: 2rem;
  }

  .definition {
    min-height: auto;
  }

  .definition-number {
    margin-bottom: 2rem;
  }
}

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