@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-500.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/source-serif-4-latin-400.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/source-serif-4-latin-ext-400.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/source-serif-4-latin-600.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/source-serif-4-latin-ext-600.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --paper: #f4ecdf;
  --paper-2: #efe4d3;
  --ink: #1c1612;
  --muted: #5a4f45;
  --line: #d7cbb8;
  --stamp: #8a1f3a;
  --stamp-ink: #6e1830;
  --violet: #4b2a55;
  --earth: #8a5a32;
  --cool: #2c4a57;
  --shell-hi: #fbf4e8;
  --shell-mid: #edd8b4;
  --shell-lo: #c49a6c;
  --focus: #8a1f3a;
  --map-land: #e7d8c2;
  --map-line: #8a7358;
  --map-hi: #8a1f3a;
  --shadow: 0 24px 50px rgba(60, 36, 16, 0.18);
  --serif: "Source Serif 4", "Iowan Old Style", Palatino, "Palatino Linotype", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --bar-h: 46px;
}
html[data-theme="dark"] {
  --paper: #16120f;
  --paper-2: #211c18;
  --ink: #f4ecdf;
  --muted: #cbbba8;
  --line: #3a322c;
  --stamp: #e07a90;
  --stamp-ink: #f0b3c0;
  --violet: #d7b7e0;
  --earth: #e0b07a;
  --cool: #9ec4d4;
  --shell-hi: #5a4c3e;
  --shell-mid: #3d3228;
  --shell-lo: #241e1a;
  --focus: #e07a90;
  --map-land: #2a241f;
  --map-line: #8a7a68;
  --map-hi: #e07a90;
  --shadow: 0 24px 50px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}
html, body { overflow-x: clip; max-width: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; }
a { color: var(--stamp); }
a:hover { color: var(--ink); }
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 40;
  background: var(--paper);
  padding: 0.4rem 0.7rem;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: var(--bar-h);
  padding: 0 0.9rem;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.home {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.topnav {
  display: flex;
  gap: 0.9rem;
  overflow-x: auto;
  scrollbar-width: none;
  min-width: 0;
}
.topnav::-webkit-scrollbar { display: none; }
.topnav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  white-space: nowrap;
}
.topnav a[aria-current="true"], .topnav a:hover { color: var(--ink); }
.spacer { flex: 1; }
.icon-btn {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  display: grid;
  place-items: center;
  cursor: pointer;
}
.icon-btn svg { display: block; }
.icon-btn svg[hidden] { display: none; }

section { scroll-margin-top: calc(var(--bar-h) + 12px); }

.wrap {
  width: min(1120px, calc(100% - 1.6rem));
  margin-inline: auto;
  max-width: 100%;
}
.prose-w { width: min(42rem, 100%); }

.hero {
  display: grid;
  grid-template-areas:
    "copy"
    "egg"
    "result";
  gap: 1rem;
  padding: 1.1rem 0 2rem;
  min-width: 0;
}
.hero-copy, .egg-stage, .hero-result { min-width: 0; max-width: 100%; }
.hero-copy { grid-area: copy; }
.egg-stage { grid-area: egg; }
.hero-result { grid-area: result; }
@media (min-width: 880px) {
  .hero {
    grid-template-areas:
      "egg copy"
      "egg result";
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
    padding-top: 1.6rem;
  }
  .egg-stage { align-self: center; }
}

.kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stamp);
  margin: 0 0 0.4rem;
}
h1 {
  font-size: clamp(1.7rem, 6vw, 3.15rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 0.7rem;
  overflow-wrap: break-word;
}
.deck {
  margin: 0 0 1.1rem;
  color: var(--ink);
  font-size: 1.12rem;
}
@media (max-width: 480px) {
  h1 { font-size: 1.5rem; max-width: 12.5em; }
  .deck { font-size: 1.02rem; }
}

.field label {
  display: block;
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}
.field input {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  font-family: var(--mono);
  font-size: clamp(1.2rem, 5.4vw, 2rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.7rem 0.65rem;
  border: 1px solid var(--ink);
  background: var(--paper-2);
  color: var(--ink);
  border-radius: 2px;
}
.field input::placeholder { color: color-mix(in srgb, var(--muted) 70%, transparent); letter-spacing: 0.12em; }

.egg-stage {
  position: relative;
  display: grid;
  place-items: center;
}
.egg-svg {
  width: min(220px, 58vw);
  height: auto;
  filter: drop-shadow(var(--shadow));
}
@media (min-width: 880px) {
  .egg-svg { width: min(400px, 100%); }
}
.egg-shell { fill: url(#shellGrad); }
.egg-speckle { mix-blend-mode: multiply; opacity: 0.28; pointer-events: none; }
html[data-theme="dark"] .egg-speckle { mix-blend-mode: screen; opacity: 0.12; }
.egg-shine { fill: url(#shineGrad); pointer-events: none; }
.stamp-text {
  font-family: var(--mono);
  font-size: 22px;
  letter-spacing: 0.08em;
  fill: var(--stamp-ink);
}
.stamp-text .is-on { fill: var(--stamp); font-weight: 500; }
.stamp-text .is-dim { opacity: 0.38; }

.split {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.9rem 0 0.4rem;
  font-family: var(--mono);
  min-width: 0;
}
.split button {
  appearance: none;
  border: 1px dashed var(--line);
  background: var(--paper-2);
  color: var(--ink);
  font: inherit;
  font-family: var(--mono);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  min-height: 48px;
  min-width: 52px;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
  border-radius: 2px;
}
.split button[data-kind="method"] { box-shadow: inset 0 -3px 0 var(--stamp); }
.split button[data-kind="country"] { box-shadow: inset 0 -3px 0 var(--violet); }
.split button[data-kind="county"] { box-shadow: inset 0 -3px 0 var(--earth); }
.split button[data-kind="farm"] { box-shadow: inset 0 -3px 0 var(--cool); }
.split button[data-kind="error"] { box-shadow: inset 0 -3px 0 var(--stamp); }
.split button[aria-pressed="true"],
.split button:hover,
.split button:focus-visible {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.sep {
  align-self: center;
  color: var(--muted);
  font-family: var(--mono);
  user-select: none;
}

.live {
  min-height: 1.4em;
  font-size: 0.95rem;
  color: var(--muted);
}
.live strong { color: var(--ink); font-weight: 600; }

.readout {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.85rem;
}
.readout article {
  border-left: 3px solid var(--line);
  padding: 0.45rem 0.7rem;
  background: color-mix(in srgb, var(--paper-2) 70%, transparent);
}
.readout article[data-kind="method"] { border-color: var(--stamp); }
.readout article[data-kind="country"] { border-color: var(--violet); }
.readout article[data-kind="county"] { border-color: var(--earth); }
.readout article[data-kind="farm"] { border-color: var(--cool); }
.readout article.is-on {
  background: color-mix(in srgb, var(--ink) 8%, var(--paper));
}
.readout .code {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.readout h3 {
  margin: 0.1rem 0 0.15rem;
  font-size: 1.15rem;
  font-weight: 600;
}
.readout p { margin: 0; font-size: 1rem; color: var(--muted); }

.map-block {
  margin-top: 0.8rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.6rem;
  align-items: center;
}
@media (min-width: 640px) {
  .map-block { grid-template-columns: 180px 1fr; }
}
.map-root { width: 100%; max-width: 100%; min-width: 0; overflow: hidden; }
.map-root svg { width: 100%; height: auto; display: block; max-width: 100%; }
.map-root path {
  fill: var(--map-land);
  stroke: var(--map-line);
  stroke-width: 0.6;
}
.map-root path.is-on {
  fill: var(--map-hi);
  stroke: var(--ink);
}
.map-root path:focus-visible { outline: 2px solid var(--focus); }
.map-caption { font-size: 0.95rem; color: var(--muted); margin: 0; }

.band {
  padding: 2.4rem 0;
  border-top: 1px solid var(--line);
}
.band h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.8rem;
}
.band p { margin: 0 0 0.9rem; }
.lead-limit { color: var(--muted); }

.digits {
  display: flex;
  gap: 0.4rem;
  margin: 0.8rem 0 1rem;
}
.digits button {
  flex: 1;
  min-height: 52px;
  font-family: var(--mono);
  font-size: 1.25rem;
  border: 1px solid var(--line);
  background: var(--paper-2);
  color: var(--ink);
  cursor: pointer;
}
.digits button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.scene {
  display: grid;
  grid-template-columns: minmax(0, 220px) 1fr;
  gap: 1rem;
  align-items: center;
}
@media (max-width: 639px) {
  .scene { grid-template-columns: 1fr; }
}
.scene svg { width: 100%; height: auto; background: var(--paper-2); border: 1px solid var(--line); }
.scene-copy h3 { margin: 0 0 0.35rem; font-size: 1.2rem; }
.note { font-size: 0.95rem; color: var(--muted); }

.warn {
  border: 1px solid var(--ink);
  padding: 1rem 1.1rem;
  background: var(--paper-2);
}
.warn h2 { margin-top: 0; }
.warn p:last-child { margin-bottom: 0; }

.know {
  display: grid;
  gap: 1rem;
}
@media (min-width: 720px) {
  .know { grid-template-columns: 1fr 1fr; }
}
.know ul { margin: 0; padding: 0; list-style: none; }
.know li {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line);
  padding-left: 1.3rem;
  position: relative;
}
.know li::before {
  position: absolute;
  left: 0;
  font-family: var(--mono);
  font-size: 0.85rem;
}
.know .yes li::before { content: "+"; color: var(--ink); }
.know .no li::before { content: "×"; color: var(--stamp); }
.know h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }

.marks {
  display: grid;
  gap: 0.55rem;
}
.marks div {
  display: grid;
  grid-template-columns: minmax(7.5rem, auto) 1fr;
  gap: 0.7rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.marks code {
  font-family: var(--mono);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

.chain {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.2rem;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  margin: 1rem 0;
}
.chain span {
  border: 1px solid var(--line);
  padding: 0.35rem 0.5rem;
}
.chain .id {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  letter-spacing: 0.12em;
}
.arrow { border: 0 !important; padding: 0 0.15rem !important; color: var(--muted); }

.scale-demo {
  margin: 1.2rem 0;
  overflow: hidden;
  width: 100%;
  max-width: 100%;
}
.scale-code {
  font-family: var(--mono);
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--stamp);
  max-width: 100%;
  overflow-wrap: anywhere;
}
.scale-code[data-size="screen"] { font-size: clamp(1.4rem, 7vw, 4.5rem); }
.scale-code[data-size="real"] { font-size: 2mm; letter-spacing: 0.02em; color: var(--ink); }

.systems {
  display: grid;
  gap: 0.7rem;
}
@media (min-width: 800px) {
  .systems { grid-template-columns: 1fr 1fr; }
}
.systems article {
  border: 1px solid var(--line);
  padding: 0.9rem;
  background: var(--paper-2);
}
.systems .num {
  font-family: var(--mono);
  font-size: 1.4rem;
  color: var(--stamp);
}
.systems h3 { margin: 0.15rem 0 0.4rem; }
.systems p { margin: 0; color: var(--muted); font-size: 1rem; }

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 0.7rem 0;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1.05rem;
}
.faq p { margin: 0.45rem 0 0; color: var(--muted); }

.sources { font-size: 0.98rem; }
.sources ol { padding-left: 1.2rem; }
.sources li { margin: 0.35rem 0; }

footer {
  padding: 1.4rem 0 2.2rem;
  color: var(--muted);
  font-size: 0.92rem;
  border-top: 1px solid var(--line);
}

.hidden { display: none; }
[hidden] { display: none !important; }

.top-link {
  position: fixed;
  right: 0.8rem;
  bottom: 0.8rem;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
}
.top-link:hover { background: var(--ink); color: var(--paper); }