:root {
  --paper: #f3efe7;
  --surface: #fffdf8;
  --ink: #102119;
  --green: #174c3f;
  --green-deep: #0d342b;
  --wine: #89364d;
  --danger: #903e3a;
  --gold: #c79b34;
  --mist: #e3ece7;
  --line: #c8c5bb;
  --muted: #56635d;
  --shadow: 0 24px 70px rgb(16 33 25 / 10%);
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 92% 2%, rgb(199 155 52 / 10%), transparent 28rem),
    var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 0.08em;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.masthead,
main,
.footer {
  width: min(1220px, calc(100% - 64px));
  margin-inline: auto;
}

.masthead {
  min-height: 96px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  border-bottom: 1px solid rgb(16 33 25 / 18%);
}

.brand {
  color: var(--green);
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.masthead nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.masthead nav a {
  font-size: 14px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.masthead nav a:hover {
  color: var(--wine);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(340px, 0.75fr);
  gap: clamp(42px, 7vw, 96px);
  align-items: center;
  min-height: 690px;
  padding-block: 80px;
}

.hero-copy {
  max-width: 740px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--wine);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.15em;
  line-height: 1.3;
  text-transform: uppercase;
}

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

h1,
h2,
h3 {
  margin-top: 0;
  font-family: var(--serif);
  font-weight: 650;
  line-height: 1.06;
}

h1 {
  max-width: 800px;
  margin-bottom: 28px;
  font-size: clamp(50px, 6.4vw, 88px);
  letter-spacing: -0.055em;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(38px, 4.5vw, 62px);
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 12px;
  font-size: 27px;
  letter-spacing: -0.025em;
}

.lede {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.55;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button,
.calculate,
.result-actions button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 20px;
  border: 1px solid var(--green);
  border-radius: 3px;
  color: #fff;
  background: var(--green);
  font: 760 15px/1.25 var(--sans);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background 150ms ease, color 150ms ease, transform 150ms ease;
}

.button:hover,
.calculate:hover,
.result-actions button:hover {
  background: var(--green-deep);
  transform: translateY(-1px);
}

.button--ghost,
.result-actions .secondary {
  color: var(--green);
  background: transparent;
}

.button--ghost:hover,
.result-actions .secondary:hover {
  color: #fff;
}

.urgent {
  position: relative;
  padding: 42px;
  border-top: 5px solid var(--gold);
  color: #fff;
  background: var(--green-deep);
  box-shadow: var(--shadow);
}

.urgent::after {
  content: "";
  position: absolute;
  right: 22px;
  bottom: 22px;
  width: 70px;
  height: 70px;
  border-right: 1px solid rgb(255 255 255 / 18%);
  border-bottom: 1px solid rgb(255 255 255 / 18%);
}

.urgent-label {
  margin: 0 0 10px;
  color: #f2ce79;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.urgent h2 {
  margin-bottom: 20px;
  font-size: 39px;
  letter-spacing: -0.035em;
}

.urgent p {
  margin: 0;
  color: rgb(255 255 255 / 83%);
}

.urgent ul {
  margin: 26px 0 0;
  padding-left: 22px;
  font-weight: 720;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-block: 1px solid var(--line);
  background: rgb(255 253 248 / 45%);
}

.facts div {
  min-height: 142px;
  display: grid;
  align-content: center;
  gap: 3px;
  padding: 28px clamp(22px, 3vw, 42px);
}

.facts div + div {
  border-left: 1px solid var(--line);
}

.facts strong {
  color: var(--green);
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1.2;
}

.facts span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  margin-top: 90px;
  padding: clamp(40px, 6vw, 80px);
  border: 1px solid rgb(16 33 25 / 13%);
  background: var(--surface);
  box-shadow: 0 18px 55px rgb(16 33 25 / 5%);
}

.section--tool {
  padding: clamp(36px, 6vw, 76px);
  background:
    linear-gradient(135deg, rgb(227 236 231 / 75%), transparent 42%),
    var(--surface);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.65fr);
  gap: 60px;
  align-items: end;
  margin-bottom: 50px;
}

.section-head h2 {
  max-width: 720px;
  margin: 0;
}

.section-head > p,
.section-intro {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.section-intro {
  max-width: 800px;
  margin-bottom: 44px;
}

.embed-section {
  background:
    linear-gradient(150deg, rgb(227 236 231 / 70%), transparent 44%),
    var(--surface);
}

.embed-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(360px, 1fr);
  gap: clamp(38px, 6vw, 76px);
  align-items: start;
}

.embed-copy .section-intro {
  margin-bottom: 24px;
}

.embed-copy > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.embed-benefits {
  display: grid;
  gap: 10px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.embed-benefits li {
  position: relative;
  padding-left: 28px;
  font-weight: 720;
}

.embed-benefits li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 900;
}

.embed-code-panel {
  padding: clamp(24px, 4vw, 36px);
  border-top: 5px solid var(--gold);
  background: var(--green-deep);
  box-shadow: var(--shadow);
}

.embed-code-panel label {
  display: block;
  margin-bottom: 10px;
  color: #fff;
  font-weight: 760;
}

.embed-code-panel textarea {
  min-height: 350px;
  padding: 18px;
  border-color: rgb(255 255 255 / 32%);
  color: #eaf2ee;
  background: #08251f;
  font: 500 13px/1.55 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  resize: vertical;
}

.embed-code-panel .embed-copy-button {
  margin-top: 14px;
  border-color: #f2ce79;
  color: var(--green-deep);
  background: #f2ce79;
}

.embed-code-panel .copy-status {
  color: rgb(255 255 255 / 78%);
}

.embed-preview {
  margin-top: clamp(44px, 6vw, 70px);
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  background: var(--paper);
}

.embed-preview-head {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: end;
  margin-bottom: 20px;
}

.embed-preview-head .eyebrow,
.embed-preview-head p {
  margin-bottom: 0;
}

.embed-preview-head > p:last-child {
  max-width: 660px;
  color: var(--muted);
}

.embed-preview-link {
  width: 100%;
  display: block;
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
}

.embed-preview-link img {
  width: 100%;
  height: auto;
  display: block;
}

.embed-preview-button {
  margin-top: 18px;
}

.calculator {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.calculator-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--line);
  background: #fff;
}

.field {
  min-width: 0;
}

.field--wide,
.calculate,
.form-error {
  grid-column: 1 / -1;
}

.field label,
.result label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 760;
}

.input-unit {
  min-width: 0;
  display: flex;
  align-items: stretch;
}

input,
select,
textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid #9da69f;
  border-radius: 0;
  color: var(--ink);
  background: #fff;
  font: 500 17px/1.35 var(--sans);
}

input,
select {
  min-height: 54px;
  padding: 12px 14px;
}

.input-unit input {
  border-right: 0;
}

.input-unit span {
  min-width: 54px;
  display: grid;
  place-items: center;
  border: 1px solid #9da69f;
  color: var(--muted);
  background: var(--paper);
  font-weight: 740;
}

.calculate {
  width: 100%;
  margin-top: 4px;
}

.form-error {
  margin: 0;
  padding: 12px 15px;
  color: #7b2724;
  background: #fae9e6;
  font-weight: 720;
}

.result {
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--green);
  border-top-width: 5px;
  background: #fff;
}

.result-top {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: start;
}

.result-label {
  margin: 0 0 6px;
  color: var(--wine);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.dose {
  flex: 0 1 auto;
  color: var(--green);
  font-family: var(--serif);
  font-size: clamp(25px, 4vw, 42px);
  line-height: 1.1;
  text-align: right;
}

.result-warning {
  margin: 24px 0;
  padding: 16px 18px;
  border-left: 4px solid var(--danger);
  color: #5c2521;
  background: #f8ece9;
  font-weight: 720;
}

textarea {
  min-height: 230px;
  padding: 16px;
  resize: vertical;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.copy-status {
  min-height: 1.65em;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.method-grid article {
  min-height: 250px;
  padding: 28px;
  border-top: 3px solid var(--green);
  background: var(--mist);
}

.method-grid article > span {
  display: block;
  margin-bottom: 36px;
  color: var(--wine);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

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

.table-wrap {
  margin-top: 36px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

th,
td {
  padding: 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: #fff;
  background: var(--green);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

td:nth-child(2) {
  white-space: nowrap;
  font-weight: 760;
}

.section--dark {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1fr);
  gap: 70px;
  color: #fff;
  background: var(--green-deep);
  box-shadow: var(--shadow);
}

.section--dark h2 {
  margin-bottom: 0;
}

.eyebrow--gold {
  color: #f2ce79;
}

.boundaries {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.boundaries li {
  position: relative;
  padding: 15px 0 15px 30px;
  border-bottom: 1px solid rgb(255 255 255 / 16%);
  color: rgb(255 255 255 / 85%);
}

.boundaries li::before {
  content: "×";
  position: absolute;
  left: 0;
  color: #f2ce79;
  font-size: 22px;
  font-weight: 800;
}

.source-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1fr);
  gap: 70px;
}

.source-layout p:not(.eyebrow) {
  color: var(--muted);
}

.source-list {
  margin: 0;
  padding: 0;
  counter-reset: source;
  list-style: none;
}

.source-list li {
  counter-increment: source;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.source-list li::before {
  content: counter(source, decimal-leading-zero);
  color: var(--wine);
  font-size: 13px;
  font-weight: 800;
}

.source-list a {
  font-weight: 720;
}

.open-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 36px;
  align-items: end;
  margin-top: 56px;
  padding: 34px;
  border-left: 4px solid var(--gold);
  background: var(--mist);
}

.open-panel h3,
.open-panel p {
  margin-bottom: 0;
}

.open-panel .actions {
  justify-content: flex-end;
  margin: 0;
}

.footer {
  display: grid;
  grid-template-columns: minmax(170px, 0.4fr) minmax(0, 1.2fr) auto;
  gap: 42px;
  align-items: start;
  margin-top: 90px;
  padding-block: 46px 64px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer strong {
  color: var(--green);
  font-family: var(--serif);
  font-size: 20px;
}

.footer p {
  margin: 0;
}

.widget-page {
  min-width: 0;
  background: var(--paper);
  font-size: 16px;
}

.widget-page .widget-shell {
  width: min(100% - 32px, 760px);
  margin-inline: auto;
  padding-block: 24px 34px;
}

.widget-intro {
  padding: 26px 28px 24px;
  border: 1px solid var(--line);
  border-bottom: 0;
  background: var(--surface);
}

.widget-intro h1 {
  margin-bottom: 12px;
  font-size: clamp(38px, 7vw, 58px);
}

.widget-intro p:last-child {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
}

.widget-emergency {
  display: grid;
  gap: 3px;
  padding: 18px 28px;
  border-top: 4px solid var(--gold);
  color: #fff;
  background: var(--green-deep);
}

.widget-emergency strong {
  font-family: var(--serif);
  font-size: 23px;
}

.widget-emergency span {
  color: rgb(255 255 255 / 82%);
}

.widget-calculator {
  gap: 16px;
  margin-top: 16px;
}

.widget-page .calculator-form,
.widget-page .result {
  padding: 24px;
}

.widget-page .result h2 {
  margin-bottom: 8px;
  font-size: clamp(28px, 6vw, 42px);
}

.widget-page .result textarea {
  min-height: 210px;
}

.widget-attribution {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  padding: 20px 24px;
  border-left: 4px solid var(--gold);
  background: var(--mist);
  color: var(--muted);
  font-size: 14px;
}

.widget-attribution p {
  margin: 0;
}

.widget-attribution a {
  color: var(--green);
  font-weight: 800;
}

@media (max-width: 900px) {
  .masthead,
  main,
  .footer {
    width: min(100% - 40px, 760px);
  }

  .hero,
  .section-head,
  .section--dark,
  .source-layout,
  .open-panel,
  .embed-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    min-height: auto;
    padding-block: 64px;
  }

  .hero-copy {
    max-width: none;
  }

  .section-head,
  .section--dark,
  .source-layout {
    gap: 34px;
  }

  .open-panel {
    align-items: start;
  }

  .open-panel .actions {
    justify-content: flex-start;
  }

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

  .embed-preview-head {
    display: grid;
    gap: 8px;
  }

  .method-grid article {
    min-height: 0;
  }

  .footer {
    grid-template-columns: minmax(170px, 0.45fr) minmax(0, 1fr);
  }

  .footer p:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  .masthead {
    min-height: 82px;
    align-items: flex-start;
    padding-block: 22px;
  }

  .masthead nav {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px 18px;
  }

  .masthead nav a {
    font-size: 11px;
  }

  h1 {
    font-size: clamp(45px, 12vw, 66px);
  }

  h2 {
    font-size: clamp(36px, 9vw, 50px);
  }

  .facts,
  .calculator-form,
  .method-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .facts div {
    min-height: 108px;
  }

  .facts div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .field--wide,
  .calculate,
  .form-error {
    grid-column: auto;
  }

  .method-grid article {
    min-height: 0;
  }

  .method-grid article > span {
    margin-bottom: 22px;
  }

  .result-top {
    display: grid;
    gap: 12px;
  }

  .dose {
    text-align: left;
  }

  .table-wrap {
    overflow: visible;
  }

  table,
  tbody,
  tr,
  td {
    display: block;
    width: 100%;
  }

  thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  tr {
    margin-bottom: 14px;
    padding: 18px;
    border-left: 3px solid var(--green);
    background: var(--mist);
  }

  td {
    padding: 3px 0;
    border: 0;
    white-space: normal;
  }

  td:first-child {
    font-weight: 800;
  }

  .footer {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .footer p:last-child {
    grid-column: auto;
  }
}

@media (max-width: 520px) {
  .masthead,
  main,
  .footer {
    width: calc(100% - 28px);
  }

  .masthead {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .hero {
    padding-block: 50px;
  }

  h1 {
    font-size: 43px;
  }

  h2 {
    font-size: 36px;
  }

  .urgent,
  .section,
  .section--tool {
    padding: 27px 22px;
  }

  .section {
    margin-top: 58px;
  }

  .facts {
    margin-inline: -14px;
  }

  .calculator-form,
  .result,
  .open-panel,
  .embed-code-panel,
  .embed-preview {
    padding: 22px 18px;
  }

  .actions,
  .result-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

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

  .source-list li {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
  }

  .widget-page .widget-shell {
    width: calc(100% - 20px);
    padding-block: 10px 20px;
  }

  .widget-intro,
  .widget-page .calculator-form,
  .widget-page .result,
  .widget-attribution {
    padding: 20px 17px;
  }

  .widget-emergency {
    padding: 17px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}