:root {
  --color-bg: #f3f0ea;
  --color-surface: #fffcf7;
  --color-input: #ffffff;
  --color-ink: #1c1917;
  --color-muted: #44403c;
  --color-line: #d6d3d1;
  --color-line-strong: #a8a29e;
  --color-header: #292524;
  --color-header-ink: #fafaf9;
  --color-accent: #c2410c;
  --color-accent-strong: #9a3412;
  --color-accent-soft: #fff7ed;
  --color-focus: #9a3412;
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --content-width: 72rem;
  --font-sans: "Segoe UI", system-ui, sans-serif;
  --radius: 0.75rem;
  --shadow: 0 1px 2px rgb(28 25 23 / 0.06), 0 8px 24px rgb(28 25 23 / 0.06);
}

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

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-accent-strong);
}

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

:focus {
  outline: none;
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: var(--space-md);
  top: var(--space-md);
  z-index: 2;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface);
  color: var(--color-ink);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

.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;
}

.site-header {
  background: var(--color-header);
  color: var(--color-header-ink);
}

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

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm) var(--space-lg);
  padding-block: var(--space-md);
}

.site-mark {
  color: var(--color-header-ink);
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.site-mark:hover {
  color: #fed7aa;
}

.site-nav {
  min-width: 0;
  max-width: 100%;
}

.site-nav ul,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs {
  margin: 0 0 var(--space-sm);
  color: var(--color-muted);
  font-size: 0.875rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--color-line-strong);
}

.intro.answer {
  color: var(--color-ink);
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--color-header-ink);
  text-decoration: none;
}

.site-nav a:hover {
  color: #fed7aa;
}

.site-nav a[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

main {
  padding-block: var(--space-2xl);
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  margin: 0 0 var(--space-md);
  font-size: clamp(2rem, 4vw, 2.75rem);
}

h2 {
  margin: 0 0 var(--space-sm);
  font-size: clamp(1.35rem, 2vw, 1.6rem);
}

h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.125rem;
}

.eyebrow {
  margin: 0 0 var(--space-xs);
  color: var(--color-accent-strong);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.intro {
  max-width: 65ch;
  margin: 0 0 var(--space-md);
  color: var(--color-muted);
}

.howto {
  max-width: 65ch;
  margin: 0 0 var(--space-xl);
  padding-left: 1.25rem;
}

.howto li + li {
  margin-top: 0.35rem;
}

.workspace {
  display: grid;
  gap: var(--space-lg);
  align-items: start;
}

.workspace > * {
  min-width: 0;
}

.calc-form-card,
.results {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.calc-form-card {
  padding: var(--space-lg);
  border-top: 4px solid var(--color-accent);
}

.info-page {
  max-width: 46rem;
}

.info-page h1 {
  margin-top: 0;
}

.info-page h2 {
  margin-top: var(--space-lg);
}

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
  min-width: 0;
}

legend {
  padding: 0;
  margin-bottom: var(--space-sm);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.3;
}

.form-section + .form-section,
.actions {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-line);
}

.hint {
  margin: var(--space-sm) 0 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.shape-list {
  display: grid;
  gap: var(--space-xs);
}

.shape-option {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  min-height: 2.75rem;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-input);
  border: 1px solid var(--color-line);
  border-radius: 0.5rem;
  cursor: pointer;
}

.shape-option:hover {
  border-color: var(--color-line-strong);
}

.shape-option:has(input:checked) {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
  box-shadow: inset 3px 0 0 var(--color-accent);
}

.shape-option:focus-within {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.shape-option input {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.2rem;
  accent-color: var(--color-accent-strong);
  flex: 0 0 auto;
}

.shape-option input:focus-visible {
  outline: none;
}

.shape-option__text {
  font-weight: 600;
}

.shape-panel {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.dimension-list {
  display: grid;
  gap: var(--space-md);
}

.dimension {
  display: grid;
  gap: var(--space-xs);
  padding: var(--space-sm);
  background: #faf7f2;
  border: 1px solid var(--color-line);
  border-radius: 0.5rem;
}

.dimension__label,
.measure__name {
  font-weight: 600;
}

.dimension__label {
  margin: 0;
}

.measure-pair {
  display: grid;
  gap: var(--space-sm);
}

.measure {
  display: grid;
  gap: var(--space-2xs);
}

.measure__name {
  font-size: 0.875rem;
}

.measure__control {
  position: relative;
  display: block;
}

.field--short .measure__control {
  max-width: 10rem;
}

.field--price .measure__control {
  max-width: 16rem;
}

input[type="text"] {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.5rem 2.5rem 0.5rem 0.75rem;
  background: var(--color-input);
  color: var(--color-ink);
  border: 1px solid var(--color-line-strong);
  border-radius: 0.5rem;
  font: inherit;
}

.measure__control--money input {
  padding-left: 1.7rem;
}

.measure__control--density input {
  padding-right: 4.6rem;
}

input[type="text"]:focus-visible {
  border-color: var(--color-accent-strong);
}

input[type="text"][aria-invalid="true"] {
  border-color: #9f1239;
}

.form-alert,
.field-error {
  color: #9f1239;
  font-size: 0.9375rem;
  font-weight: 600;
}

.form-alert {
  margin: 0 0 var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: #fff1f2;
  border: 1px solid #fda4af;
  border-radius: 0.5rem;
}

.field-error {
  margin: var(--space-xs) 0 0;
}

.prefix,
.suffix {
  position: absolute;
  top: 50%;
  color: var(--color-muted);
  font-size: 0.875rem;
  pointer-events: none;
  transform: translateY(-50%);
}

.prefix {
  left: 0.7rem;
}

.suffix {
  right: 0.7rem;
}

.material-grid {
  display: grid;
  gap: var(--space-lg);
}

.bag-size legend {
  font-size: 1rem;
}

.choice-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.choice {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  min-height: 2.75rem;
  padding: 0.35rem 0.85rem;
  background: var(--color-input);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  cursor: pointer;
}

.choice:hover {
  border-color: var(--color-line-strong);
}

.choice:has(input:checked) {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
  font-weight: 700;
}

.choice:focus-within {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.choice input {
  accent-color: var(--color-accent-strong);
}

.choice input:focus-visible {
  outline: none;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.button {
  flex: 1 1 8.5rem;
  min-height: 2.75rem;
  padding: 0.65rem 1.1rem;
  border-radius: 0.5rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.button-primary {
  background: var(--color-accent-strong);
  color: #ffffff;
  border: 2px solid var(--color-accent-strong);
}

.button-primary:hover {
  background: #7c2d12;
  border-color: #7c2d12;
}

.button-primary:focus-visible {
  outline-color: #1c1917;
}

.button-secondary {
  background: var(--color-input);
  color: var(--color-ink);
  border: 2px solid var(--color-ink);
}

.button-secondary:hover {
  background: #f5f5f4;
}

.results {
  overflow: visible;
}

.results:focus {
  outline: none;
  box-shadow: inset 0 0 0 3px var(--color-focus);
}

.results__header {
  padding: var(--space-lg);
  background: var(--color-header);
  color: var(--color-header-ink);
}

.results__header p {
  margin: var(--space-xs) 0 0;
  color: #e7e5e4;
}

.results__body {
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-lg);
}

.results__body h3 {
  margin-top: var(--space-sm);
}

.results__body h3:first-child {
  margin-top: 0;
}

.status {
  margin: 0;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent-soft);
  border: 1px solid #fdba74;
  border-radius: 0.5rem;
}

.status:empty {
  display: none;
}

.result-list {
  margin: 0;
}

.result-list div {
  display: grid;
  gap: 0.15rem;
  padding-block: 0.7rem;
  border-bottom: 1px solid var(--color-line);
}

.result-list div:last-child {
  border-bottom: 0;
}

.result-list dt {
  color: var(--color-muted);
  font-size: 0.875rem;
  font-weight: 600;
}

.result-list dd {
  margin: 0;
}

.result-list dd.is-placeholder {
  color: #57534e;
  font-style: italic;
}

.site-footer {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
}

.footer-links {
  margin-bottom: var(--space-md);
}

.placeholder {
  font-size: 0.875rem;
}

.disclaimer {
  max-width: 65ch;
  margin: 0;
  font-size: 0.9375rem;
}

.footer-links a {
  color: var(--color-accent-strong);
  font-weight: 700;
}

.optional-settings {
  margin-top: var(--space-lg);
  padding: var(--space-sm) var(--space-md) var(--space-md);
  background: #faf7f2;
  border: 1px solid var(--color-line);
  border-radius: 0.5rem;
}

.optional-settings summary {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  font-weight: 700;
  cursor: pointer;
}

.optional-settings summary:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.purchase-callout {
  padding: var(--space-md);
  background: var(--color-accent-soft);
  border: 2px solid var(--color-accent);
  border-radius: 0.5rem;
}

.purchase-callout h3 {
  margin-bottom: var(--space-xs);
}

.purchase-callout .result-list div:last-child {
  border-bottom: 0;
}

.result-list dd,
.guide p,
.guide li,
.assumption-list li,
.site-footer p {
  overflow-wrap: anywhere;
}

.assumption-list {
  margin: var(--space-sm) 0 0;
  padding-left: 1.2rem;
}

.assumption-list li + li {
  margin-top: 0.4rem;
}

.guide {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.guide section {
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.guide h2 {
  margin-bottom: var(--space-sm);
}

.guide p,
.guide ul,
.guide ol {
  margin: 0 0 var(--space-sm);
}

.guide p:last-child,
.guide ul:last-child,
.guide ol:last-child {
  margin-bottom: 0;
}

.diagram-grid {
  display: grid;
  gap: var(--space-md);
}

.diagram {
  margin: var(--space-sm) 0 0;
  padding: var(--space-sm);
  max-width: 36rem;
  background: #faf7f2;
  border: 1px solid var(--color-line);
  border-radius: 0.5rem;
}

.diagram svg {
  display: block;
  width: 100%;
  height: auto;
}

.diagram figcaption {
  margin-top: var(--space-xs);
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.steps-figure {
  max-width: 28rem;
}

.faq-list {
  display: grid;
  gap: var(--space-xs);
}

.faq-list details {
  padding: var(--space-xs) var(--space-sm);
  background: #faf7f2;
  border: 1px solid var(--color-line);
  border-radius: 0.5rem;
}

.faq-list summary {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  font-weight: 700;
  cursor: pointer;
}

.faq-list summary:focus-visible,
.guide a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.faq-list details p {
  margin: 0 0 var(--space-sm);
}

.example-actions {
  margin-top: var(--space-md);
}

.opening-list {
  display: grid;
  gap: var(--space-md);
}

.opening-row {
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: #faf7f2;
  border: 1px solid var(--color-line);
  border-radius: 0.5rem;
}

.opening-row > .button {
  justify-self: start;
}

@media (min-width: 30rem) {
  .measure-pair {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 40rem) {
  .site-header__inner,
  .page {
    width: min(100% - 3rem, var(--content-width));
  }

  .calc-form-card,
  .results__header,
  .results__body,
  .guide section {
    padding: var(--space-xl);
  }

  .shape-list,
  .diagram-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 64rem) {
  main {
    padding-block: 4rem;
  }

  .workspace {
    grid-template-columns: minmax(0, 1.05fr) minmax(18rem, 0.95fr);
    align-items: start;
  }
}

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

@media print {
  @page {
    margin: 0.5in;
  }

  html,
  body {
    background: #ffffff;
    min-height: 0 !important;
    height: auto;
  }

  body {
    font-size: 10.5pt;
    line-height: 1.35;
  }

  .skip-link,
  .site-header,
  .site-footer,
  .actions,
  .example-actions,
  .guide,
  .howto,
  .intro,
  .eyebrow,
  .breadcrumbs,
  .shape-list,
  .form-section .hint,
  .optional-settings > .hint,
  noscript {
    display: none !important;
  }

  main {
    padding: 0 !important;
  }

  .page {
    width: auto;
    margin: 0;
  }

  .workspace {
    display: block;
  }

  h1 {
    font-size: 16pt;
    margin-bottom: 0.2rem;
  }

  h2,
  h3 {
    break-after: avoid;
  }

  .calc-form-card,
  .results,
  .info-page,
  .results__header,
  .results__body {
    box-shadow: none;
    padding: 0;
    border: 0;
    break-inside: auto;
  }

  .results__header {
    background: #ffffff;
    color: #000000;
    padding-bottom: 0.35rem;
  }

  .results__header p {
    color: #000000;
  }

  .purchase-callout {
    padding: 0.35rem 0.5rem;
    break-inside: avoid;
  }

  .result-list div {
    padding-block: 0.2rem;
  }

  .page > h2,
  .form-section:has(.shape-list),
  .calc-form-card .hint,
  .results__header p,
  #add-opening,
  .remove-opening {
    display: none !important;
  }

  .dimension,
  .opening-row,
  .optional-settings,
  .field {
    break-inside: avoid;
    background: transparent;
    border: 0;
    padding: 0.05rem 0;
    margin: 0;
    box-shadow: none;
  }

  .choice {
    break-inside: avoid;
    min-height: 0;
    padding: 0.05rem 0.4rem;
  }

  .dimension-list,
  .shape-panel,
  .material-grid,
  .results__body,
  .opening-row {
    gap: 0.2rem;
  }

  .form-section + .form-section,
  .optional-settings {
    margin-top: 0.35rem;
    padding-top: 0.25rem;
  }

  legend,
  .dimension__label {
    margin-bottom: 0.1rem;
    font-size: 10.5pt;
  }

  .measure-pair {
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
  }

  input[type="text"] {
    min-height: 1.35rem;
    padding: 0.05rem 2.1rem 0.05rem 0.35rem;
    border-radius: 0.15rem;
    font-size: 10.5pt;
  }

  .measure__control--money input {
    padding-left: 1.15rem;
  }

  .measure__control--density input {
    padding-right: 3.5rem;
  }

  .result-list div {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
    padding-block: 0.12rem;
  }

  .result-list dt {
    flex: 1 1 auto;
  }

  .result-list dd {
    flex: 0 0 auto;
    text-align: right;
  }

  .assumption-list {
    margin: 0.15rem 0 0;
  }

  .assumption-list li + li {
    margin-top: 0.12rem;
  }

  .status,
  .purchase-callout {
    break-inside: avoid;
  }

  .results,
  .optional-settings {
    position: static;
    max-height: none;
    overflow: visible;
  }
}