:root {
  color-scheme: light;
  --ink: #0d1b22;
  --ink-2: #18303b;
  --paper: #f5f8f7;
  --white: #ffffff;
  --muted: #5d6c72;
  --line: #cad5d7;
  --accent: #ef9f23;
  --accent-dark: #a85d00;
  --positive: #16745a;
  --warning: #ad4d22;
  --focus: #0e77a8;
  --shadow: 0 18px 46px rgba(5, 20, 27, 0.13);
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  max-width: 100%;
}

body {
  margin: 0;
  max-width: 100%;
  overflow-x: hidden;
  background:
    linear-gradient(180deg, var(--ink) 0 330px, var(--paper) 330px 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.55;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

button,
select {
  cursor: pointer;
}

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

.ingredient-table-wrap:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 20;
  background: var(--white);
  color: var(--ink);
  padding: 0.7rem 1rem;
  border-radius: 0 0 6px 6px;
}

.skip-link:focus {
  top: 0;
}

.site-header {
  position: relative;
  z-index: 20;
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.header-inner,
.page,
.footer-inner {
  width: min(1180px, calc(100% - 2rem));
  margin-inline: auto;
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--white);
  text-decoration: none;
  flex: 0 0 auto;
}

.brand-wordmark {
  display: inline-flex;
  align-items: center;
  color: inherit;
  font-size: 1.45rem;
  font-weight: 820;
  letter-spacing: -0.055em;
  line-height: 1;
  white-space: nowrap;
}

.brand-c {
  width: 1.02em;
  height: 1.2em;
  margin: 0 -0.035em 0 -0.025em;
  overflow: visible;
}

.brand-c-shape,
.brand-c-ticks {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.brand-c-shape {
  stroke: currentColor;
  stroke-width: 6.5;
}

.brand-c-ticks {
  stroke: var(--accent);
  stroke-width: 2.6;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  font-size: 0.94rem;
}

.nav a {
  color: #e8eeee;
  text-decoration: none;
}

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

.calculator-menu {
  position: relative;
}

.calculator-menu summary {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.45rem 0.78rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  color: #e8eeee;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
}

.calculator-menu summary::-webkit-details-marker {
  display: none;
}

.calculator-menu summary::after {
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  content: "";
  transform: translateY(-0.12rem) rotate(45deg);
  transition: transform 140ms ease;
}

.calculator-menu[open] summary,
.calculator-menu summary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.calculator-menu[open] summary::after {
  transform: translateY(0.12rem) rotate(225deg);
}

.calculator-menu summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 999px;
}

.calculator-menu-panel {
  position: absolute;
  top: calc(100% + 0.45rem);
  right: 0;
  left: auto;
  z-index: 30;
  display: grid;
  width: 21rem;
  padding: 0.45rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.calculator-menu-panel a {
  display: block;
  min-height: 42px;
  padding: 0.58rem 0.7rem;
  border-radius: 6px;
  color: var(--ink);
  line-height: 1.3;
}

.calculator-menu-panel a:hover {
  background: #edf2f2;
  color: var(--accent-dark);
}

.calculator-menu-panel a[aria-current="page"] {
  background: #fff1d7;
  color: var(--ink);
  font-weight: 780;
  box-shadow: inset 3px 0 0 var(--accent);
}

.page {
  padding: 3rem 0 5rem;
}

.intro {
  color: var(--white);
  max-width: 780px;
  margin: 0 0 2rem;
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--accent);
  font-weight: 760;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(2.25rem, 6vw, 4.75rem);
  max-width: 900px;
}

.intro p {
  margin: 0;
  max-width: 720px;
  color: #d4dfe1;
  font-size: clamp(1rem, 2.2vw, 1.18rem);
}

.calculator-workspace-nav {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  min-width: 0;
  margin: 0 0 0.8rem;
  padding: 0.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 8px 24px rgba(5, 20, 27, 0.1);
}

.calculator-workspace-label {
  padding-inline: 0.45rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.calculator-workspace-links {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.3rem;
  min-width: 0;
}

.calculator-workspace-links a {
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 44px;
  padding: 0.45rem 0.35rem;
  border: 1px solid transparent;
  border-radius: 6px;
  color: #33484f;
  font-size: 0.82rem;
  font-weight: 740;
  line-height: 1.15;
  text-align: center;
  text-decoration: none;
}

.calculator-workspace-links a:hover {
  border-color: #e2b45d;
  background: #fff7e8;
  color: var(--ink);
}

.calculator-workspace-links a[aria-current="page"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
  box-shadow: inset 0 -3px 0 var(--accent);
}

.calculator-workspace-mobile {
  display: none;
}

body[aria-busy="true"] .calculator-workspace-nav {
  opacity: 0.72;
}

.calculator-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(310px, 0.82fr);
  width: 100%;
  max-width: 100%;
  min-width: 0;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.input-panel,
.result-panel {
  min-width: 0;
  padding: clamp(1.25rem, 3.2vw, 2.25rem);
}

.input-panel {
  background: var(--white);
}

.input-panel form,
.result-list {
  width: 100%;
  min-width: 0;
}

.input-panel h2,
.result-panel h2 {
  margin: 0 0 1.25rem;
  font-size: 1.3rem;
}

.result-panel {
  background:
    repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.04),
      rgba(255, 255, 255, 0.04) 1px,
      transparent 1px,
      transparent 34px
    ),
    var(--ink-2);
  color: var(--white);
  position: relative;
}

.result-panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--accent);
}

.fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.field {
  min-width: 0;
}

.field.full {
  grid-column: 1 / -1;
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

label,
.field-label {
  display: block;
  color: #273a42;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.input-wrap {
  display: flex;
  align-items: stretch;
  border: 1px solid #9cabad;
  border-radius: 7px;
  overflow: hidden;
  background: var(--white);
}

.input-wrap:focus-within {
  border-color: var(--focus);
  box-shadow: 0 0 0 2px rgba(14, 119, 168, 0.18);
}

.prefix,
.suffix {
  display: grid;
  place-items: center;
  min-width: 2.5rem;
  padding: 0 0.65rem;
  color: #40545b;
  background: #edf2f2;
  font-weight: 700;
}

input,
select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  min-height: 46px;
  border: 1px solid #9cabad;
  border-radius: 7px;
  background: var(--white);
  color: var(--ink);
  padding: 0.65rem 0.7rem;
}

.input-wrap input {
  border: 0;
  border-radius: 0;
  min-width: 0;
}

.input-wrap input:focus {
  outline: 0;
}

.hint {
  display: block;
  color: var(--muted);
  margin-top: 0.35rem;
  font-size: 0.78rem;
}

.unit-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.3rem;
  min-width: 0;
  margin: 0 0 0.45rem;
  padding: 0;
  border: 0;
}

.unit-toggle label {
  position: relative;
  min-width: 0;
  margin: 0;
  cursor: pointer;
}

.unit-toggle input {
  position: absolute;
  width: 1px;
  height: 1px;
  min-height: 1px;
  margin: 0;
  padding: 0;
  opacity: 0;
}

.unit-toggle span {
  display: grid;
  place-items: center;
  min-height: 40px;
  min-width: 0;
  padding: 0.45rem 0.5rem;
  border: 1px solid #9cabad;
  border-radius: 6px;
  background: #edf2f2;
  color: #40545b;
  font-size: 0.86rem;
  font-weight: 740;
  line-height: 1.2;
  text-align: center;
}

.unit-toggle input:checked + span {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
}

.unit-toggle input:focus-visible {
  outline: 0;
}

.unit-toggle input:focus-visible + span {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.25rem;
}

.button {
  border: 0;
  border-radius: 7px;
  background: var(--accent);
  color: #17120a;
  padding: 0.72rem 1rem;
  font-weight: 780;
  text-decoration: none;
}

.button:hover {
  background: #ffb33b;
}

.button.secondary {
  background: #e9eeee;
  color: var(--ink);
}

.button.secondary:hover {
  background: #d9e2e3;
}

.button.dark {
  background: var(--ink);
  color: var(--white);
}

.button.small {
  font-size: 0.88rem;
  padding: 0.55rem 0.72rem;
}

.headline-result {
  margin-bottom: 1.5rem;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.headline-result .result-label {
  display: block;
  color: #b8c9cd;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.headline-result strong {
  display: block;
  margin-top: 0.12rem;
  font-size: clamp(3rem, 7vw, 5rem);
  line-height: 1;
  color: var(--white);
  letter-spacing: -0.06em;
}

.target-status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.8rem;
  padding: 0.34rem 0.62rem;
  border-radius: 999px;
  background: rgba(239, 159, 35, 0.16);
  color: #ffd28b;
  font-size: 0.84rem;
  font-weight: 700;
}

.target-status.good {
  color: #8ce1c5;
  background: rgba(58, 183, 149, 0.16);
}

.result-list {
  display: grid;
  gap: 0;
  margin: 0;
}

.result-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content;
  align-items: start;
  gap: 1.5rem;
  min-width: 0;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
}

.result-row dt {
  min-width: 0;
  color: #bfd0d3;
  overflow-wrap: anywhere;
}

.result-row dd {
  min-width: 0;
  max-width: 44vw;
  margin: 0;
  text-align: right;
  font-weight: 760;
  overflow-wrap: anywhere;
}

.result-note,
.error-message {
  margin: 1rem 0 0;
  padding: 0.75rem 0.85rem;
  border-radius: 6px;
  font-size: 0.88rem;
}

.result-note {
  background: rgba(255, 255, 255, 0.08);
  color: #d7e2e4;
}

.error-message {
  display: none;
  background: #ffebe4;
  color: #7e2c0e;
}

.error-message.visible {
  display: block;
}

.ingredient-table-wrap {
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-inline: contain;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x pan-y;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-dark) #e4eaea;
  padding-bottom: 0.45rem;
  margin-top: 1rem;
}

.ingredient-table-wrap::-webkit-scrollbar {
  height: 10px;
}

.ingredient-table-wrap::-webkit-scrollbar-track {
  background: #e4eaea;
  border-radius: 999px;
}

.ingredient-table-wrap::-webkit-scrollbar-thumb {
  background: var(--accent-dark);
  border: 2px solid #e4eaea;
  border-radius: 999px;
}

.table-scroll-hint {
  display: none;
  margin: 0.8rem 0 -0.5rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.ingredient-table {
  width: max(100%, 680px);
  min-width: 680px;
  border-collapse: collapse;
  table-layout: fixed;
}

.ingredient-table th:first-child,
.ingredient-table td:first-child {
  width: 28%;
}

.ingredient-table th:last-child,
.ingredient-table td:last-child {
  width: 92px;
}

.ingredient-table th {
  color: var(--muted);
  font-size: 0.78rem;
  text-align: left;
  padding: 0.45rem;
  border-bottom: 2px solid var(--line);
}

.ingredient-table td {
  padding: 0.45rem;
  border-bottom: 1px solid #e1e7e7;
}

.ingredient-table input {
  min-height: 40px;
  padding: 0.45rem 0.55rem;
}

.scenario-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.scenario-buttons button {
  border: 1px solid #9cabad;
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  padding: 0.45rem 0.7rem;
  font-weight: 700;
}

.scenario-buttons button:hover {
  border-color: var(--accent-dark);
  background: #fff7e8;
}

.below-calculator {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.5fr);
  gap: 2rem;
  min-width: 0;
  margin-top: 3.25rem;
}

.content-card,
.formula-card {
  min-width: 0;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.2rem, 3vw, 2rem);
}

.content-card h2,
.formula-card h2 {
  margin: 0 0 1rem;
  font-size: 1.65rem;
}

.content-card h3 {
  margin: 1.6rem 0 0.55rem;
  font-size: 1.15rem;
}

.content-card p,
.content-card li,
.formula-card p {
  color: #3e5158;
}

.formula {
  display: block;
  overflow-x: auto;
  margin: 0.8rem 0;
  padding: 0.8rem 0.9rem;
  border-left: 4px solid var(--accent);
  background: #edf2f2;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
}

.callout {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  border: 1px solid #e4c17f;
  border-radius: 8px;
  background: #fff8e9;
  color: #4f3a14;
}

.calculator-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}

.calculator-card {
  display: flex;
  flex-direction: column;
  min-height: 220px;
  border: 1px solid var(--line);
  border-top: 5px solid var(--accent);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  padding: 1.3rem;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.calculator-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(13, 27, 34, 0.12);
}

.calculator-card .number {
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.calculator-card h2 {
  margin: 0.7rem 0 0.5rem;
  font-size: 1.35rem;
}

.calculator-card p {
  color: var(--muted);
  margin: 0;
}

.calculator-card .card-link {
  margin-top: auto;
  padding-top: 1rem;
  font-weight: 760;
}

.section-heading {
  margin: 3.5rem 0 1.2rem;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
}

.plain-page {
  max-width: 820px;
  margin-inline: auto;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.35rem, 4vw, 3rem);
}

.plain-page h1 {
  color: var(--ink);
  font-size: clamp(2rem, 5vw, 3.2rem);
}

.plain-page h2 {
  margin-top: 2rem;
}

.plain-page p,
.plain-page li {
  color: #3e5158;
}

.site-footer {
  background: #081318;
  color: #c8d4d6;
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.footer-copy p {
  max-width: 500px;
  margin: 0.35rem 0 0;
  color: #94a7ac;
  font-size: 0.88rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--accent);
}

.home-note {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 3rem;
  border: 1px solid var(--line);
  background: var(--line);
}

.home-note > div {
  background: var(--white);
  padding: 1.25rem;
}

.home-note strong {
  display: block;
  margin-bottom: 0.35rem;
}

.home-note span {
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 860px) {
  body {
    background: linear-gradient(180deg, var(--ink) 0 430px, var(--paper) 430px 100%);
  }

  .calculator-workspace-nav {
    grid-template-columns: 1fr;
  }

  .calculator-workspace-label,
  .calculator-workspace-links {
    display: none;
  }

  .calculator-workspace-mobile {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
  }

  .calculator-workspace-mobile label {
    margin: 0;
  }

  .calculator-shell,
  .below-calculator {
    grid-template-columns: 1fr;
  }

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

  .result-panel::before {
    width: 100%;
    height: 5px;
    bottom: auto;
  }
}

@media (max-width: 640px) {
  .header-inner {
    min-height: 64px;
  }

  .nav > a {
    display: none;
  }

  .nav {
    gap: 0.7rem;
  }

  .calculator-menu-panel {
    position: fixed;
    top: 64px;
    right: 1rem;
    left: 1rem;
    width: auto;
    max-height: calc(100dvh - 5rem);
    overflow-y: auto;
  }

  .page {
    padding-top: 2rem;
  }

  .fields,
  .calculator-grid,
  .home-note {
    grid-template-columns: 1fr;
  }

  .calculator-shell {
    margin-inline: -0.45rem;
    border-radius: 7px;
  }

  .input-panel,
  .result-panel {
    padding: 1.2rem;
  }

  .table-scroll-hint {
    display: block;
  }

  .footer-inner {
    flex-direction: column;
  }

  .headline-result strong {
    font-size: 3.4rem;
  }
}

@media (max-width: 420px) {
  .header-inner {
    gap: 0.75rem;
  }

  .nav {
    gap: 0.45rem;
  }

  .calculator-menu summary {
    gap: 0.35rem;
    padding-inline: 0.65rem;
    font-size: 0.84rem;
  }

  .calculator-workspace-mobile {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }

  .result-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.15rem;
  }

  .result-row dd {
    max-width: 100%;
    text-align: left;
    font-size: 1.03rem;
  }
}

@supports (overflow: clip) {
  body {
    overflow-x: clip;
  }
}

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

  .calculator-card {
    transition: none;
  }
}

@media print {
  body {
    background: white;
  }

  .site-header,
  .site-footer,
  .form-actions,
  .calculator-workspace-nav,
  .calculator-grid,
  .below-calculator {
    display: none;
  }

  .page {
    width: 100%;
    padding: 0;
  }

  .intro {
    color: black;
  }

  .intro p {
    color: #333;
  }

  .calculator-shell {
    grid-template-columns: 1fr 1fr;
    box-shadow: none;
    border: 1px solid #888;
  }
}