:root {
  color-scheme: light;
  --page-width: 980px;
  --paper: #f8faf7;
  --surface: #eef3ee;
  --surface-strong: #e4ebe4;
  --ink: #172019;
  --muted: #556158;
  --line: #c9d4ca;
  --accent: #196b45;
  --accent-strong: #0f5032;
  --signal: #d77624;
  --focus: #8b4d14;
  --shadow: 0 18px 45px rgba(22, 43, 29, 0.09);
  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --transition: 180ms cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --paper: #121814;
  --surface: #1b241e;
  --surface-strong: #263129;
  --ink: #edf4ee;
  --muted: #b1bdb3;
  --line: #3c4b40;
  --accent: #72d49e;
  --accent-strong: #9be7bb;
  --signal: #f1a35f;
  --focus: #ffc37f;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
}

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

html {
  min-width: 20rem;
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 4rem 4rem;
  background-attachment: fixed;
  font-family: Avenir, "Avenir Next", Corbel, "Segoe UI", sans-serif;
  line-height: 1.65;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  content: "";
  background: color-mix(in srgb, var(--paper) 94%, transparent);
}

a {
  color: var(--accent-strong);
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.16em;
}

button,
input {
  font: inherit;
}

button,
a,
input {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 0.2rem solid var(--focus);
  outline-offset: 0.2rem;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-200%);
}

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

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

.site-header {
  position: relative;
  z-index: 10;
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(0.75rem);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--ink);
  font-family: Rockwell, "Rockwell Nova", "Roboto Slab", serif;
  font-weight: 700;
  line-height: 1.15;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 auto;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  color: var(--accent-strong);
  background: var(--surface);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: -0.08em;
}

.site-nav,
.page-tools {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-nav a,
.tool-button {
  min-height: 2.75rem;
  padding: var(--space-2) var(--space-3);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: transparent;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition);
}

.site-nav a:hover,
.site-nav a[aria-current="page"],
.tool-button:hover {
  border-color: var(--line);
  color: var(--ink);
  background: var(--surface);
}

.controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding-block: var(--space-3);
}

.width-control {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.width-control input {
  width: 8rem;
  accent-color: var(--accent);
}

.width-value {
  min-width: 3.6rem;
  color: var(--ink);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  text-align: right;
}

main {
  padding-block: var(--space-7) var(--space-8);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(17rem, 0.75fr);
  gap: var(--space-7);
  align-items: center;
  min-height: 30rem;
}

.eyebrow {
  margin: 0 0 var(--space-4);
  color: var(--accent-strong);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: Rockwell, "Rockwell Nova", "Roboto Slab", serif;
  line-height: 1.08;
  text-wrap: balance;
}

h1 {
  max-width: 13ch;
  margin: 0;
  font-size: clamp(2.8rem, 8vw, 6.25rem);
  letter-spacing: -0.055em;
}

.page-hero h1 {
  max-width: 18ch;
  font-size: clamp(2.5rem, 7vw, 5rem);
}

h2 {
  margin: 0 0 var(--space-4);
  font-size: clamp(1.65rem, 4vw, 2.6rem);
  letter-spacing: -0.025em;
}

h3 {
  margin: 0 0 var(--space-3);
  font-size: 1.15rem;
}

.lede {
  max-width: 37rem;
  margin: var(--space-5) 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-5);
  border: 2px solid var(--accent-strong);
  border-radius: var(--radius-sm);
  color: var(--paper);
  background: var(--accent-strong);
  font-weight: 800;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.button:hover {
  box-shadow: 0 0.35rem 0 var(--line);
  transform: translateY(-0.15rem);
}

.term-assembly {
  position: relative;
  padding: var(--space-6);
  border: 2px solid var(--ink);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.term-assembly::before,
.term-assembly::after {
  position: absolute;
  width: 1.5rem;
  height: 1.5rem;
  content: "";
}

.term-assembly::before {
  top: var(--space-3);
  left: var(--space-3);
  border-top: 0.25rem solid var(--signal);
  border-left: 0.25rem solid var(--signal);
}

.term-assembly::after {
  right: var(--space-3);
  bottom: var(--space-3);
  border-right: 0.25rem solid var(--signal);
  border-bottom: 0.25rem solid var(--signal);
}

.assembly-label {
  color: var(--muted);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.assembly-term {
  margin-block: var(--space-4) var(--space-3);
  font-family: Rockwell, "Rockwell Nova", "Roboto Slab", serif;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
}

.assembly-definition {
  margin: 0;
  color: var(--muted);
}

.assembly-status {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
  color: var(--accent-strong);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.8rem;
  font-weight: 800;
}

.section {
  padding-block: var(--space-8);
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(10rem, 0.45fr) minmax(0, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.section-heading p {
  max-width: 42rem;
  margin: 0;
  color: var(--muted);
}

.feature-list,
.privacy-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  padding: 0;
  list-style: none;
}

.feature-list li,
.privacy-summary > div {
  padding: var(--space-5);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.feature-list p,
.privacy-summary p {
  margin: 0;
  color: var(--muted);
}

.fact {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--accent-strong);
  font-family: Rockwell, "Rockwell Nova", "Roboto Slab", serif;
  font-size: 2rem;
  font-weight: 700;
}

.page-hero {
  max-width: 52rem;
  padding-block: var(--space-7) var(--space-8);
}

.prose {
  max-width: 48rem;
}

.prose section {
  padding-block: var(--space-6);
  border-top: 1px solid var(--line);
}

.prose p,
.prose li {
  color: var(--muted);
}

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

.prose ul {
  padding-left: var(--space-5);
}

.prose li + li {
  margin-top: var(--space-2);
}

.note {
  padding: var(--space-5);
  border-left: 0.3rem solid var(--signal);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--surface);
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-5);
  align-items: center;
  padding: var(--space-6);
  border: 2px solid var(--ink);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.contact-panel p {
  margin: var(--space-2) 0 0;
  color: var(--muted);
}

.site-footer {
  padding-block: var(--space-6);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer-links {
  display: flex;
  gap: var(--space-4);
}

@media (max-width: 50rem) {
  .header-row,
  .controls,
  .footer-row {
    align-items: flex-start;
  }

  .header-row,
  .footer-row {
    flex-direction: column;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
  }

  .controls {
    justify-content: space-between;
  }

  .hero,
  .section-heading,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .feature-list,
  .privacy-summary {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 34rem) {
  .site-shell {
    width: min(calc(100% - 1.25rem), var(--page-width));
  }

  main {
    padding-top: var(--space-5);
  }

  .controls,
  .width-control {
    align-items: flex-start;
    flex-direction: column;
  }

  .width-control input {
    width: min(15rem, 70vw);
  }

  .actions,
  .button {
    width: 100%;
  }

  .term-assembly,
  .contact-panel {
    padding: var(--space-5);
  }

  .section {
    padding-block: var(--space-7);
  }
}

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

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