:root {
  color-scheme: light;
  --ink: #191713;
  --ink-soft: #4d4941;
  --paper: #fbf7ef;
  --paper-strong: #fffdf8;
  --line: #d9d0c0;
  --oxide: #b54b32;
  --oxide-dark: #7c2f24;
  --copper: #d98a47;
  --signal: #138a83;
  --signal-dark: #0f5d59;
  --graphite: #2b2a27;
  --mint: #dceee9;
  --shadow: 0 18px 60px rgba(31, 25, 18, 0.14);
  --max: 1180px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}

body.nav-open {
  overflow: hidden;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(217, 208, 192, 0.72);
  background: rgba(251, 247, 239, 0.92);
  backdrop-filter: blur(18px);
}

.nav-shell {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(181, 75, 50, 0.45);
  border-radius: 8px;
  background: conic-gradient(
    from 180deg,
    var(--oxide),
    var(--copper),
    var(--signal),
    var(--oxide)
  );
  color: var(--paper-strong);
  font-size: 0;
  box-shadow: 0 8px 24px rgba(181, 75, 50, 0.16);
}

.brand-mark::before {
  content: "Fx";
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 13px;
  border-radius: 8px;
  color: var(--ink-soft);
  font-size: 0.94rem;
  font-weight: 650;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a[aria-current="page"] {
  color: var(--ink);
  background: rgba(217, 208, 192, 0.48);
  outline: none;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-strong);
  color: var(--ink);
  font: inherit;
}

.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: min(64svh, 640px);
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(25, 23, 19, 0.92), rgba(25, 23, 19, 0.65)),
    #191713;
  color: var(--paper-strong);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.8;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 34%;
  background: linear-gradient(0deg, rgba(25, 23, 19, 0.72), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(42px, 7vh, 76px) 0 clamp(28px, 4vh, 46px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.45fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: end;
}

.eyebrow {
  margin: 0 0 16px;
  color: #f0b56d;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 880px;
  margin: 0;
  font-size: clamp(2.8rem, 6.2vw, 4.85rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 760px;
  margin: 18px 0 0;
  color: rgba(255, 253, 248, 0.82);
  font-size: clamp(1.08rem, 2vw, 1.38rem);
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--oxide);
  color: var(--paper-strong);
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 12px 34px rgba(181, 75, 50, 0.22);
}

.button:hover,
.button:focus-visible {
  background: var(--oxide-dark);
  outline: none;
}

.button.secondary {
  background: rgba(255, 253, 248, 0.08);
  border-color: rgba(255, 253, 248, 0.25);
  color: var(--paper-strong);
  box-shadow: none;
}

.button.secondary:hover,
.button.secondary:focus-visible {
  background: rgba(255, 253, 248, 0.16);
}

.button.light {
  background: var(--paper-strong);
  color: var(--ink);
  border-color: var(--line);
  box-shadow: none;
}

.hero-panel {
  align-self: stretch;
  display: grid;
  align-content: end;
  gap: 16px;
}

.signal-readout {
  border: 1px solid rgba(255, 253, 248, 0.16);
  border-radius: var(--radius);
  padding: 18px;
  background: rgba(25, 23, 19, 0.48);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.24);
}

.readout-label {
  color: rgba(255, 253, 248, 0.58);
  font-size: 0.78rem;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.readout-main {
  margin: 10px 0 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(1.18rem, 2vw, 1.45rem);
  color: #bfece4;
}

.readout-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.readout-grid div {
  min-height: 78px;
  border: 1px solid rgba(255, 253, 248, 0.12);
  border-radius: 8px;
  padding: 12px;
}

.readout-grid strong {
  display: block;
  color: var(--paper-strong);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.08rem;
}

.readout-grid span {
  color: rgba(255, 253, 248, 0.62);
  font-size: 0.82rem;
}

.section {
  padding: clamp(64px, 10vw, 110px) 0;
}

.section.compact {
  padding: clamp(44px, 8vw, 72px) 0;
}

.section.alt {
  background: var(--paper-strong);
}

.section.dark {
  background: var(--graphite);
  color: var(--paper-strong);
}

.section.mint {
  background: var(--mint);
}

.shell {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.76fr) minmax(260px, 0.42fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: end;
  margin-bottom: 38px;
}

.section-heading h2,
.page-hero h1 {
  margin: 0;
  font-size: clamp(2.05rem, 5vw, 4.4rem);
  line-height: 1;
  letter-spacing: 0;
}

.section-heading p,
.page-hero p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.dark .section-heading p,
.dark p,
.dark .muted {
  color: rgba(255, 253, 248, 0.72);
}

.grid {
  display: grid;
  gap: 18px;
}

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

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

.card {
  min-height: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--paper-strong);
  box-shadow: 0 1px 0 rgba(25, 23, 19, 0.03);
}

.dark .card {
  border-color: rgba(255, 253, 248, 0.14);
  background: rgba(255, 253, 248, 0.06);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
}

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

.card ul {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--ink-soft);
}

.dark .card p,
.dark .card ul {
  color: rgba(255, 253, 248, 0.72);
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-strong);
}

.metric {
  min-height: 132px;
  padding: 22px;
  border-right: 1px solid var(--line);
}

.metric:last-child {
  border-right: 0;
}

.metric strong {
  display: block;
  color: var(--oxide-dark);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1;
}

.metric span {
  display: block;
  margin-top: 12px;
  color: var(--ink-soft);
}

.flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.flow-step {
  position: relative;
  min-height: 150px;
  padding: 18px;
  border: 1px solid rgba(255, 253, 248, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.06);
}

.flow-step::after {
  content: "";
  position: absolute;
  top: 30px;
  right: -13px;
  width: 13px;
  height: 1px;
  background: rgba(255, 253, 248, 0.26);
}

.flow-step:last-child::after {
  display: none;
}

.flow-step span {
  display: block;
  color: #f0b56d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86rem;
}

.flow-step strong {
  display: block;
  margin-top: 30px;
  font-size: 1.05rem;
}

.page-hero {
  padding: clamp(76px, 12vw, 132px) 0 clamp(48px, 8vw, 80px);
  background:
    linear-gradient(90deg, rgba(25, 23, 19, 0.94), rgba(43, 42, 39, 0.78)),
    #191713;
  color: var(--paper-strong);
}

.page-hero .shell {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(260px, 0.45fr);
  gap: clamp(30px, 6vw, 80px);
  align-items: end;
}

.page-hero p {
  color: rgba(255, 253, 248, 0.76);
}

.page-hero-note {
  border-left: 3px solid var(--copper);
  padding-left: 18px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(280px, 0.52fr);
  gap: clamp(32px, 6vw, 80px);
  align-items: start;
}

.prose {
  max-width: 840px;
}

.prose h2 {
  margin: 0 0 18px;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1.05;
}

.prose h3 {
  margin: 34px 0 10px;
}

.prose p,
.prose li {
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.prose p {
  margin: 0 0 18px;
}

.prose ul,
.prose ol {
  margin: 0 0 22px;
  padding-left: 22px;
}

.code-panel {
  border: 1px solid rgba(19, 138, 131, 0.24);
  border-radius: var(--radius);
  background: #171512;
  color: #f6ead2;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.code-panel header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 253, 248, 0.1);
  color: rgba(255, 253, 248, 0.65);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
}

pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.7;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}

p code,
li code {
  padding: 0.12em 0.34em;
  border: 1px solid rgba(25, 23, 19, 0.12);
  border-radius: 6px;
  background: rgba(255, 253, 248, 0.7);
}

.status-list {
  display: grid;
  gap: 12px;
}

.status-row {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.status-row strong {
  color: var(--signal-dark);
}

.status-row p {
  margin: 0;
  color: var(--ink-soft);
}

.callout {
  border-left: 4px solid var(--oxide);
  padding: 20px 22px;
  background: var(--paper-strong);
}

.callout p {
  margin: 0;
}

.doc-list {
  display: grid;
  gap: 14px;
}

.doc-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
}

.doc-link strong {
  display: block;
  font-size: 1.08rem;
}

.doc-link span {
  display: block;
  color: var(--ink-soft);
}

.doc-link em {
  font-style: normal;
  color: var(--oxide-dark);
  font-weight: 800;
}

.site-footer {
  padding: 46px 0;
  background: #171512;
  color: rgba(255, 253, 248, 0.72);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-links a {
  color: rgba(255, 253, 248, 0.82);
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: #fffdf8;
  outline: none;
}

@media (max-width: 980px) {
  .hero-content,
  .page-hero .shell,
  .section-heading,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    max-width: 560px;
  }

  .grid.three,
  .metric-strip,
  .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-step::after {
    display: none;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    inset: 72px 0 auto;
    display: none;
    padding: 18px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
  }

  .nav-open .nav-links {
    display: grid;
  }

  .nav-links a {
    min-height: 48px;
  }

  .hero {
    min-height: auto;
  }

  .hero-content {
    padding-top: 72px;
  }

  .grid.three,
  .grid.two,
  .metric-strip,
  .flow,
  .readout-grid {
    grid-template-columns: 1fr;
  }

  .metric {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metric:last-child {
    border-bottom: 0;
  }

  .status-row,
  .doc-link,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(3rem, 17vw, 4.8rem);
  }

  .page-hero h1,
  .section-heading h2 {
    font-size: clamp(2.2rem, 11vw, 3.4rem);
  }
}