/* rawmilk.store: plain CSS, mobile first, light and dark via prefers-color-scheme. */

:root {
  color-scheme: light dark;

  --bg: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --line: #e1e0d9;
  --axis: #c3c2b7;
  --control-border: #898781;
  --accent: #1c5cab;
  --accent-ink: #ffffff;
  --series: #2a78d6;
  --band-opacity: 0.14;
  --warn-bg: #fab219;
  --warn-ink: #0b0b0b;
  --shadow: 0 1px 2px rgba(11, 11, 11, 0.06);

  --radius: 10px;
  --gap: 1rem;
  --touch: 48px;
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0d;
    --surface: #1a1a19;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --line: #2c2c2a;
    --axis: #383835;
    --control-border: #898781;
    --accent: #86b6ef;
    --accent-ink: #0b0b0b;
    --series: #3987e5;
    --band-opacity: 0.26;
    --shadow: none;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 1rem/1.5 var(--font);
}

h1,
h2,
h3,
p,
dl,
dd,
fieldset,
figure {
  margin: 0;
}

h1 {
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h2 {
  font-size: 1.125rem;
  line-height: 1.3;
}

h3 {
  font-size: 1rem;
  line-height: 1.3;
}

a {
  color: var(--accent);
  text-underline-offset: 0.15em;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.print-only {
  display: none;
}

.skip {
  position: absolute;
  left: 0.5rem;
  top: -4rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-radius: var(--radius);
}

.skip:focus {
  top: 0.5rem;
}

.wrap {
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ── Header and footer ─────────────────────────────────────────────────── */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 1rem;
}

.brand {
  margin-right: auto;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.site-header nav ul {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header nav a,
.brand {
  display: flex;
  align-items: center;
  min-height: var(--touch);
  padding: 0 0.6rem;
}

.brand {
  gap: 0.5rem;
  padding-left: 0;
}

.brand-logo {
  display: block;
  flex: none;
}

.site-header nav a {
  color: var(--ink-2);
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--ink);
  text-decoration: underline;
}

.site-header nav a[aria-current] {
  color: var(--ink);
  font-weight: 600;
}

.langs a {
  min-width: 2.75rem;
  justify-content: center;
  font-size: 0.875rem;
}

.site-footer {
  margin-top: 3rem;
  padding: 1.5rem 0 2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 0.9375rem;
}

.site-footer p + p {
  margin-top: 0.5rem;
}

/* ── Page layout ───────────────────────────────────────────────────────── */

.intro {
  padding: 1.5rem 0 1.25rem;
}

.intro p {
  max-width: 44rem;
  margin-top: 0.5rem;
  color: var(--ink-2);
}

.layout {
  display: grid;
  gap: var(--gap);
}

.panel {
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.stack > * + * {
  margin-top: var(--gap);
}

.results {
  display: grid;
  gap: var(--gap);
  align-content: start;
}

/* Lets wide content (tables, the chart) scroll inside its panel instead of
   stretching the page. */
.layout > *,
.results > *,
.headline > * {
  min-width: 0;
}

@media (min-width: 60rem) {
  .layout {
    grid-template-columns: minmax(20rem, 26rem) minmax(0, 1fr);
    align-items: start;
  }
}

/* ── Dairy price ───────────────────────────────────────────────────────── */

.price-controls {
  display: grid;
  gap: 0.75rem;
}

.price-value {
  font-size: 1.0625rem;
  font-weight: 600;
}

.price-line,
.price-note,
.authority {
  color: var(--ink-2);
  font-size: 0.9375rem;
}

.price-note p + p {
  margin-top: 0.35rem;
}

.badge {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.1rem 0.5rem;
  background: var(--warn-bg);
  color: var(--warn-ink);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  vertical-align: middle;
}

/* ── Form controls ─────────────────────────────────────────────────────── */

label,
legend,
.label {
  display: block;
  padding: 0;
  font-size: 0.9375rem;
  font-weight: 600;
}

select,
input[type='number'],
.button {
  min-height: var(--touch);
  font: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--control-border);
  border-radius: 8px;
}

select {
  width: 100%;
  margin-top: 0.3rem;
  padding: 0 0.75rem;
}

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

.segmented {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  margin-top: 0.3rem;
  border: 1px solid var(--control-border);
  border-radius: 8px;
  overflow: hidden;
}

.segmented label {
  font-weight: 400;
  cursor: pointer;
}

.segmented span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(var(--touch) - 2px);
  padding: 0 0.5rem;
  background: var(--bg);
  text-align: center;
}

.segmented input:checked + span {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}

.segmented input:focus-visible + span {
  outline: 3px solid var(--accent);
  outline-offset: -5px;
  box-shadow: inset 0 0 0 2px var(--accent-ink);
}

.field + .field {
  margin-top: 0.9rem;
}

.field-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 9.5rem;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.15rem;
}

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

.number input {
  width: 100%;
  padding: 0 0.6rem;
  font-variant-numeric: tabular-nums;
}

.number .unit {
  display: block;
  margin-top: 0.1rem;
  color: var(--ink-2);
  font-size: 0.8125rem;
  text-align: right;
}

input[type='range'] {
  width: 100%;
  height: var(--touch);
  margin: 0;
  background: transparent;
  accent-color: var(--accent);
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

input[type='range']::-webkit-slider-runnable-track {
  height: 6px;
  background: var(--axis);
  border-radius: 3px;
}

input[type='range']::-moz-range-track {
  height: 6px;
  background: var(--axis);
  border-radius: 3px;
}

input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 28px;
  height: 28px;
  margin-top: -11px;
  background: var(--accent);
  border: 3px solid var(--surface);
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--accent);
}

input[type='range']::-moz-range-thumb {
  width: 22px;
  height: 22px;
  background: var(--accent);
  border: 3px solid var(--surface);
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--accent);
}

details > summary {
  display: flex;
  align-items: center;
  min-height: var(--touch);
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
}

details > summary::before {
  content: '+';
  width: 1.25rem;
  font-weight: 400;
}

details[open] > summary::before {
  content: '−';
}

details > summary::-webkit-details-marker {
  display: none;
}

details > summary {
  list-style: none;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.1rem;
  font-weight: 600;
  cursor: pointer;
}

.button-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.share-status {
  color: var(--ink-2);
  font-size: 0.9375rem;
}

/* ── Results ───────────────────────────────────────────────────────────── */

.headline {
  display: grid;
  gap: var(--gap);
}

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

.stat-label {
  color: var(--ink-2);
  font-size: 0.9375rem;
}

.stat-value {
  display: block;
  min-height: 1.15em;
  font-size: clamp(1.75rem, 7vw, 2.5rem);
  font-weight: 650;
  line-height: 1.15;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.stat-note {
  min-height: 1.4em;
  color: var(--ink-2);
  font-size: 0.875rem;
}

.facts {
  display: grid;
  gap: 0.75rem 1.25rem;
}

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

.facts dt {
  color: var(--ink-2);
  font-size: 0.9375rem;
}

.facts dd {
  min-height: 1.4em;
  font-size: 1.125rem;
  font-weight: 600;
}

.note {
  margin-top: 0.35rem;
  color: var(--ink-2);
  font-size: 0.9375rem;
}

.table-scroll {
  margin-top: 0.75rem;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: 0.55rem 0.5rem;
  border-bottom: 1px solid var(--line);
  text-align: right;
  vertical-align: top;
}

th:first-child,
td:first-child {
  padding-left: 0;
  text-align: left;
}

th:last-child,
td:last-child {
  padding-right: 0;
}

@media (max-width: 26rem) {
  table {
    font-size: 0.875rem;
  }

  th,
  td {
    padding-right: 0.3rem;
    padding-left: 0.3rem;
  }
}

thead th {
  color: var(--ink-2);
  font-weight: 600;
}

tbody th {
  font-weight: 600;
}

/* ── Chart ─────────────────────────────────────────────────────────────── */

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0.5rem 0 0.25rem;
  padding: 0;
  list-style: none;
  color: var(--ink-2);
  font-size: 0.875rem;
}

.legend li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.key {
  display: inline-block;
  flex: none;
  width: 16px;
}

.key-line {
  height: 2px;
  background: var(--series);
  border-radius: 1px;
}

.key-band {
  height: 10px;
  background: var(--series);
  opacity: calc(var(--band-opacity) + 0.1);
  border-radius: 2px;
}

.chart {
  position: relative;
  min-height: 260px;
  border-radius: 6px;
}

.chart-svg {
  display: block;
  width: 100%;
  height: auto;
  touch-action: pan-y;
}

.chart-grid {
  stroke: var(--line);
  stroke-width: 1;
}

.chart-zero {
  stroke: var(--control-border);
  stroke-width: 1;
}

.chart-tick {
  fill: var(--ink-2);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.chart-band {
  fill: var(--series);
  fill-opacity: var(--band-opacity);
}

.chart-line {
  fill: none;
  stroke: var(--series);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.chart-dot {
  fill: var(--series);
  stroke: var(--surface);
  stroke-width: 2;
}

.chart-label {
  fill: var(--ink-2);
  font-size: 12px;
  paint-order: stroke;
  stroke: var(--surface);
  stroke-width: 4px;
  stroke-linejoin: round;
}

.chart-label-strong {
  fill: var(--ink);
  font-size: 13px;
  font-weight: 600;
}

.chart-crosshair {
  stroke: var(--control-border);
  stroke-width: 1;
}

.chart-crosshair,
.chart-hover-dot {
  visibility: hidden;
}

.is-active .chart-crosshair,
.is-active .chart-hover-dot {
  visibility: visible;
}

.chart-hit {
  fill: transparent;
}

.chart-tooltip {
  position: absolute;
  top: 0;
  z-index: 2;
  max-width: 15rem;
  padding: 0.5rem 0.65rem;
  background: var(--surface);
  border: 1px solid var(--axis);
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(11, 11, 11, 0.14);
  font-size: 0.8125rem;
  pointer-events: none;
}

.chart-tooltip-title {
  color: var(--ink-2);
}

.chart-tooltip-row {
  display: grid;
  grid-template-columns: 16px auto;
  align-items: center;
  column-gap: 0.4rem;
  margin-top: 0.3rem;
}

.chart-tooltip-row strong {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.chart-tooltip-name {
  grid-column: 2;
  color: var(--ink-2);
}

/* ── Sticky summary (shown while the headline results are off screen) ─── */

.sticky-summary {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 5;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 0.5rem 1rem calc(0.5rem + env(safe-area-inset-bottom));
  background: var(--surface);
  border-top: 1px solid var(--axis);
  box-shadow: 0 -4px 14px rgba(11, 11, 11, 0.1);
  transform: translateY(110%);
  visibility: hidden;
  transition:
    transform 0.2s ease,
    visibility 0.2s;
}

.sticky-summary.is-visible {
  transform: none;
  visibility: visible;
}

.sticky-summary span {
  display: block;
  color: var(--ink-2);
  font-size: 0.75rem;
  line-height: 1.2;
}

.sticky-summary strong {
  font-size: 1.125rem;
  line-height: 1.3;
}

.has-sticky {
  padding-bottom: 4.5rem;
}

@media (prefers-reduced-motion: reduce) {
  .sticky-summary {
    transition: none;
  }
}

/* ── Method page ───────────────────────────────────────────────────────── */

.prose {
  max-width: 52rem;
}

.prose h2 {
  margin-top: 2rem;
  font-size: 1.25rem;
}

.prose p,
.prose dl,
.prose pre,
.prose .table-scroll {
  margin-top: 0.75rem;
}

.prose pre {
  padding: 1rem;
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: 0.8125rem/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.prose dt {
  margin-top: 0.75rem;
  font: 600 0.875rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.prose td,
.prose th {
  text-align: left;
}

.prose .num {
  text-align: right;
  white-space: nowrap;
}

.prose table {
  min-width: 34rem;
}

.break {
  overflow-wrap: anywhere;
}

/* ── Language chooser (root page) ──────────────────────────────────────── */

.chooser {
  display: grid;
  min-height: 100vh;
  min-height: 100dvh;
  place-content: center;
  gap: 1.5rem;
  padding: 1rem;
  text-align: center;
}

.chooser ul {
  display: grid;
  gap: 0.75rem;
  width: min(18rem, 80vw);
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.chooser .button {
  width: 100%;
  text-decoration: none;
}

/* ── Print: a one-page summary ─────────────────────────────────────────── */

@media print {
  :root {
    --bg: #ffffff;
    --surface: #ffffff;
    --ink: #000000;
    --ink-2: #333333;
    --line: #cccccc;
    --axis: #999999;
    --control-border: #666666;
    --accent: #000000;
    --series: #2a78d6;
    --band-opacity: 0.14;
    --shadow: none;
  }

  @page {
    margin: 12mm;
  }

  body {
    font-size: 8.5pt;
    line-height: 1.25;
  }

  .no-print,
  .intro p,
  .stat-note:empty,
  .authority,
  .site-header nav,
  .sticky-summary,
  .skip,
  #calc-form .fields,
  #calc-form .price-controls,
  .chart-tooltip {
    display: none !important;
  }

  .print-only {
    display: block;
  }

  .has-sticky {
    padding-bottom: 0;
  }

  .wrap {
    max-width: none;
    padding: 0;
  }

  .site-header {
    border: 0;
  }

  .site-header nav a,
  .brand {
    min-height: 0;
  }

  .intro {
    padding: 0.25rem 0 0.5rem;
  }

  h1 {
    font-size: 15pt;
  }

  h2,
  h3 {
    font-size: 10.5pt;
  }

  .layout,
  .results {
    display: block;
  }

  .panel {
    margin-top: 0.25rem;
    padding: 0.25rem 0;
    border: 0;
    border-top: 1px solid var(--line);
    border-radius: 0;
    break-inside: avoid;
  }

  .stack > * + * {
    margin-top: 0.3rem;
  }

  .headline {
    grid-template-columns: 1fr 1fr;
    gap: 0 1rem;
  }

  .stat-value {
    font-size: 15pt;
  }

  .stat-note {
    min-height: 0;
  }

  .legend {
    margin: 0.2rem 0 0;
  }

  .facts {
    grid-template-columns: repeat(4, 1fr);
  }

  .facts dd {
    font-size: 10.5pt;
  }

  th,
  td {
    padding: 0.2rem 0.4rem;
  }

  .table-scroll {
    margin-top: 0.3rem;
    overflow: visible;
  }

  .chart {
    min-height: 0;
  }

  .chart-svg {
    max-height: 38mm;
  }

  .print-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 1.5rem;
    margin-top: 0.3rem;
  }

  .print-inputs div {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.1rem 0;
    border-bottom: 1px solid var(--line);
  }

  .print-inputs dd {
    font-weight: 600;
    white-space: nowrap;
  }

  .site-footer {
    margin-top: 0.5rem;
    padding: 0.4rem 0 0;
  }

  a {
    color: inherit;
    text-decoration: none;
  }
}