/* A quiet reading surface, with numbers kept close to their assumptions. */
* { box-sizing: border-box; }
html { scroll-padding-top: 116px; }
body { margin: 0; font: 17px/1.7 var(--font-body); color: var(--fg-default); background: var(--bg-page); }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
button, input, select { font: inherit; }
button, select { border: 1px solid var(--border-default); border-radius: 4px; padding: .5rem .75rem; color: var(--fg-default); background: var(--bg-surface); }
button { cursor: pointer; font-size: 13px; font-weight: 600; }
button:hover { border-color: var(--accent); background: var(--accent-bg); }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.skip-link { position: fixed; top: -90px; left: 20px; z-index: 30; padding: 10px; background: var(--bg-surface); }
.skip-link:focus { top: 10px; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 17px max(24px, calc((100vw - 1280px)/2)); border-bottom: 1px solid var(--border-default); }
.brand { font-size: 15px; font-weight: 700; color: var(--fg-default); text-decoration: none; }
.brand span { display: block; font-family: var(--font-mono); font-size: 10px; letter-spacing: .08em; font-weight: 400; color: var(--fg-muted); text-transform: uppercase; }
.header-actions { display: flex; gap: 8px; }
.section-nav { position: sticky; top: 0; z-index: 10; display: flex; gap: 2px; padding: 9px max(18px, calc((100vw - 1292px)/2)); overflow-x: auto; background: var(--bg-page); border-bottom: 1px solid var(--border-default); scrollbar-width: thin; }
.section-nav a { white-space: nowrap; font-size: 12px; font-weight: 600; color: var(--fg-muted); padding: 7px 9px; text-decoration: none; border-radius: 3px; }
.section-nav a[aria-current="location"] { color: var(--accent); background: var(--accent-bg); }
main { width: min(1280px, calc(100% - 48px)); margin: 0 auto; }
section { padding: 70px 0; border-bottom: 1px solid var(--border-default); }
.hero { padding-top: 72px; }
.plate { display: block; margin: 0 0 19px; font: 11px/1.5 var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--fg-muted); }
h1, h2, h3, h4 { color: var(--fg-default); line-height: 1.16; letter-spacing: -.035em; }
h1 { font-size: clamp(38px, 4.55vw, 66px); max-width: 1100px; margin: 0 0 25px; font-weight: 650; }
h2 { font-size: clamp(28px, 3vw, 41px); font-weight: 620; max-width: 1060px; margin: 0 0 25px; }
h3 { font-size: 24px; margin: 42px 0 17px; font-weight: 650; }
h4 { font-size: 20px; margin: 0 0 15px; }
p { max-width: 940px; margin: 0 0 20px; }
.hero-lede { max-width: 850px; font-size: 23px; line-height: 1.5; color: var(--fg-muted); margin-bottom: 28px; }
strong { font-weight: 650; }
ul, ol { max-width: 940px; padding-left: 25px; margin: 15px 0 26px; }
li { padding-left: 4px; margin: 11px 0; }
.note { font-size: 13px; line-height: 1.65; color: var(--fg-muted); }
code, .formula { font-family: var(--font-mono); font-size: 12px; }
.formula { background: var(--bg-surface-muted); padding: 18px; line-height: 1.9; overflow-wrap: anywhere; margin: 16px 0; }
.readout-strip { display: grid; grid-template-columns: repeat(4,1fr); margin: 38px 0 22px; border: 1px solid var(--border-default); background: var(--bg-surface); }
.readout { padding: 22px; border-right: 1px solid var(--border-default); }
.readout:last-child { border-right: 0; }
.readout .plate { font-size: 10px; margin-bottom: 12px; }
.readout strong { display: block; font: 36px/1.2 var(--font-mono); margin-bottom: 11px; letter-spacing: -.045em; }
.readout > span:last-child { font-size: 12px; line-height: 1.5; color: var(--fg-muted); display: block; }
.decision-grid, .text-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 32px; }
.decision-grid > div { border-top: 2px solid var(--border-default); padding-top: 24px; }
.decision-grid h2 { font-size: 23px; letter-spacing: -.025em; }
.decision-grid ul { font-size: 15px; margin-bottom: 0; }
.text-columns { gap: 0 40px; }
.text-columns p { font-size: 15px; }
.table-wrap { overflow-x: auto; margin: 25px 0; border: 1px solid var(--border-default); background: var(--bg-surface); }
table { border-collapse: collapse; width: 100%; font-size: 13px; line-height: 1.55; }
th { text-align: left; font-size: 10px; font-weight: 600; color: var(--fg-muted); letter-spacing: .035em; text-transform: uppercase; background: var(--bg-surface-muted); vertical-align: bottom; }
td, th { padding: 14px 16px; border-bottom: 1px solid var(--border-default); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
td:first-child { font-weight: 600; }
td.numeric, th.numeric { text-align: right; font-family: var(--font-mono); white-space: nowrap; }
td a { overflow-wrap: anywhere; }
table caption { text-align: left; font-size: 16px; font-weight: 650; padding: 18px 16px; }
.chart-panel { border: 1px solid var(--border-default); background: var(--bg-surface); padding: 24px; margin: 25px 0; }
.chart-panel h3 { font-size: 19px; margin: 0 0 10px; }
.legend { display: flex; flex-wrap: wrap; gap: 20px; font-size: 11px; color: var(--fg-muted); margin: 16px 0 24px; }
.legend span::before { content: ''; display: inline-block; width: 10px; height: 10px; margin-right: 7px; background: var(--fg-muted); }
.legend .pack-key::before { background: var(--border-default); }
.basket-bars { display: grid; grid-template-columns: 170px 1fr; gap: 24px 18px; align-items: center; }
.bar-label { font-size: 12px; line-height: 1.6; font-family: var(--font-mono); }
.bar-pair { display: grid; gap: 5px; }
.bar-row { display: flex; align-items: center; gap: 10px; }
.bar-track { flex: 1; height: 13px; background: var(--bg-surface-muted); }
.bar-fill { height: 100%; background: var(--fg-muted); min-width: 1px; }
.bar-fill.pack { background: var(--border-default); border-right: 1px solid var(--fg-subtle); }
.bar-row output { width: 69px; text-align: right; font: 12px var(--font-mono); }
.basket-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding: 22px; background: var(--bg-surface); border: 1px solid var(--border-default); margin: 24px 0; }
.basket-controls label { font-size: 13px; font-weight: 600; }
.basket-controls select { display: block; width: 100%; margin-top: 12px; font-size: 14px; }
.basket-controls input { display: block; width: 100%; margin: 18px 0 4px; }
.basket-controls output { font: 12px var(--font-mono); color: var(--accent); }
.inline-readouts { display: flex; flex-wrap: wrap; gap: 20px 40px; margin: 22px 0; }
.inline-readouts span { display: block; font-size: 11px; color: var(--fg-muted); }
.inline-readouts strong { display: block; font: 24px/1.4 var(--font-mono); margin-top: 4px; }
details { border-top: 1px solid var(--border-default); border-bottom: 1px solid var(--border-default); padding: 16px 0; margin: 24px 0; }
summary { cursor: pointer; font-size: 14px; font-weight: 650; color: var(--accent); }
details > p { margin-top: 20px; }
.inventory table { min-width: 900px; }
.badge { display: inline-block; padding: 2px 5px; margin: 5px 0; border-radius: 2px; color: var(--warn); background: var(--warn-bg); font: 10px var(--font-mono); }
.calculator { display: grid; grid-template-columns: minmax(0,1.55fr) minmax(290px,1fr); gap: 30px; align-items: start; margin: 30px 0; }
.calculator h3 { margin-top: 0; }
.controls-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; }
.control { min-width: 0; }
.control-head { display: flex; align-items: start; justify-content: space-between; gap: 8px; }
.control-head label { font-size: 12px; font-weight: 600; line-height: 1.45; padding-top: 6px; }
.input-unit { display: flex; gap: 5px; align-items: center; flex-shrink: 0; }
.input-unit input { width: 75px; font: 13px var(--font-mono); text-align: right; color: var(--fg-default); background: var(--bg-surface); padding: 5px; border: 1px solid var(--border-default); border-radius: 3px; }
.input-unit span { font: 10px var(--font-mono); color: var(--fg-muted); }
input[type="range"] { width: 100%; accent-color: var(--accent); height: 20px; cursor: pointer; }
.control-note { font-size: 11px; line-height: 1.5; margin: 2px 0 0; color: var(--fg-muted); }
.advanced { margin-top: 30px; }
.advanced .controls-grid { margin-top: 25px; }
.results-panel { padding: 24px; border: 1px solid var(--border-default); background: var(--bg-surface); position: sticky; top: 76px; }
.results-panel .plate { font-size: 10px; margin-bottom: 10px; }
.result-main { font: 40px/1.2 var(--font-mono); margin: 0 0 10px; letter-spacing: -.05em; }
.result-main + p { font-size: 12px; color: var(--fg-muted); }
.result-list { display: grid; grid-template-columns: 1fr auto; gap: 12px; margin: 22px 0; font-size: 12px; border-top: 1px solid var(--border-default); padding-top: 20px; }
.result-list dt { color: var(--fg-muted); }
.result-list dd { margin: 0; font-family: var(--font-mono); text-align: right; }
.status-note { font-size: 12px; line-height: 1.6; padding: 12px; margin-bottom: 0; background: var(--bg-surface-muted); }
.positive { color: var(--ok); }
.negative { color: var(--critical); }
.warning { color: var(--warn); }
.model-toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin: 25px 0; }
.cost-row { display: grid; grid-template-columns: 190px 1fr 75px; gap: 15px; align-items: center; margin: 12px 0; font-size: 12px; }
.cost-row > output { text-align: right; font: 12px var(--font-mono); }
.cost-row .bar-track { height: 10px; }
.heatmap td { font: 12px var(--font-mono); white-space: nowrap; }
.heatmap td.positive { background: var(--ok-bg); }
.heatmap td.negative { background: var(--critical-bg); }
.heatmap th { white-space: nowrap; }
.season-svg { width: 100%; display: block; color: var(--fg-muted); }
.season-svg text { font: 12px var(--font-mono); fill: currentColor; }
.season-svg .grid-line { stroke: var(--border-default); stroke-width: 1; }
.season-svg .zero-line { stroke: var(--fg-subtle); stroke-width: 1; }
.downloads { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; margin: 30px 0; font-size: 13px; }
footer { max-width: 1280px; width: calc(100% - 48px); margin: 0 auto; padding: 30px 0; display: flex; flex-wrap: wrap; gap: 12px 30px; font-size: 11px; color: var(--fg-muted); }
.research-notes pre { white-space: pre-wrap; overflow-wrap: anywhere; font: 13px/1.85 var(--font-mono); max-width: 1000px; }
@media (max-width:1000px) {
 .topbar { padding-inline: 24px; }
 .section-nav { padding-inline: 15px; }
 .readout { padding: 17px; }
 .readout strong { font-size: 29px; }
 .calculator { grid-template-columns: 1fr; }
 .results-panel { position: static; }
 .controls-grid { gap: 22px 32px; }
}
@media (max-width:600px) {
 body { font-size: 16px; line-height: 1.7; }
 .topbar { padding: 14px 18px; align-items: flex-start; }
 .brand { font-size: 13px; max-width: 180px; }
 .header-actions { flex-direction: column; gap: 5px; }
 .header-actions button { font-size: 10px; padding: 5px 8px; }
 main { width: calc(100% - 36px); }
 section { padding: 44px 0; }
 .hero { padding-top: 42px; }
 h1 { font-size: 39px; line-height: 1.1; }
 h2 { font-size: 28px; }
 h3 { font-size: 22px; margin-top: 32px; }
 .hero-lede { font-size: 19px; }
 .readout-strip { grid-template-columns: 1fr 1fr; margin-top: 26px; }
 .readout:nth-child(2) { border-right: 0; }
 .readout:nth-child(-n+2) { border-bottom: 1px solid var(--border-default); }
 .readout strong { font-size: 30px; }
 .decision-grid, .text-columns, .basket-controls, .controls-grid { grid-template-columns: 1fr; gap: 22px; }
 .decision-grid { gap: 30px; }
 .chart-panel { padding: 16px; }
 .basket-bars { grid-template-columns: 1fr; gap: 8px; }
 .bar-label:not(:first-child) { margin-top: 13px; }
 .basket-controls { padding: 18px; }
 .input-unit input { width: 88px; }
 .control-head label { font-size: 13px; }
 .control-note { font-size: 12px; }
 .control { padding-bottom: 5px; }
 td, th { padding: 11px 12px; }
 table { min-width: 670px; }
 .result-main { font-size: 36px; }
 .cost-row { grid-template-columns: 130px 1fr 60px; gap: 8px; font-size: 11px; }
 .season-svg { min-width: 600px; }
 #season-chart { overflow-x: auto; }
 footer { width: calc(100% - 36px); }
}
@media print {
 :root { --bg-page:#fff; --bg-surface:#fff; --bg-surface-muted:#f0f0f0; --fg-default:#111; --fg-muted:#444; --fg-subtle:#666; --border-default:#ccc; --accent:#744700; --ok:#245c35; --critical:#a12a26; }
 @page { size: A4; margin: 15mm; }
 body { font-size: 10pt; line-height: 1.5; background: white; }
 .topbar, .section-nav, .header-actions, .model-toolbar, .downloads, .skip-link { display: none; }
 main, footer { width: 100%; max-width: none; }
 section { padding: 20px 0; }
 h1 { font-size: 29pt; }
 h2 { font-size: 20pt; }
 h3 { font-size: 15pt; }
 .hero-lede { font-size: 13pt; }
 .readout strong { font-size: 21pt; }
 .plate { font-size: 7pt; }
 .note, .control-note { font-size: 8pt; }
 .table-wrap { overflow: visible; }
 table, .inventory table { min-width: 0; font-size: 7.5pt; }
 td, th { padding: 6px; overflow-wrap: anywhere; }
 th { font-size: 6.5pt; }
 .calculator { display: block; }
 .controls-grid { grid-template-columns: 1fr 1fr; }
 .results-panel { position: static; margin-top: 20px; }
 .control { break-inside: avoid; }
 .chart-panel, .readout-strip { break-inside: avoid; }
 .result-main { font-size: 25pt; }
 input[type="range"] { display: none; }
 .basket-controls input[type="range"] { display: none; }
 .cost-row { grid-template-columns: 150px 1fr 65px; }
 .decision-grid { gap: 20px; }
 a { color: inherit; }
 h2, h3 { break-after: avoid; }
 tr { break-inside: avoid; }
 .season-svg { min-width: 0; }
}