:root {
  --bg: #f6f7f5;
  --surface: #ffffff;
  --surface-2: #f0f3f1;
  --text: #17201f;
  --muted: #5c6a68;
  --border: #d9e0dd;
  --accent: #0f5c63;
  --accent-text: #ffffff;
  --accent-soft: #e2f0ee;
  --ok: #1d7a4c;
  --ok-soft: #dff2e7;
  --warn: #9a6200;
  --warn-soft: #fbefd5;
  --bad: #b3261e;
  --bad-soft: #fbe3e1;
  --bar: #0f5c63;
  --focus: #2a8f9a;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 32, 30, 0.06), 0 4px 16px rgba(16, 32, 30, 0.05);
  --mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101615;
    --surface: #172120;
    --surface-2: #1d2a28;
    --text: #e6eeec;
    --muted: #9aaba8;
    --border: #2c3b39;
    --accent: #5cc2b4;
    --accent-text: #0c1716;
    --accent-soft: #19332f;
    --ok: #63d197;
    --ok-soft: #173326;
    --warn: #f0b75a;
    --warn-soft: #3a2c12;
    --bad: #ff8a80;
    --bad-soft: #3d1c1a;
    --bar: #5cc2b4;
    --focus: #7fd1c3;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

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

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.brand-mark { width: 28px; height: 28px; }
.site-nav { display: flex; gap: 18px; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.site-nav a:hover { color: var(--text); }

/* Intro */
.intro { padding: 32px 0 8px; }
.intro h1 { font-size: clamp(26px, 4vw, 34px); line-height: 1.15; margin: 0 0 10px; letter-spacing: -0.02em; }
.lead { color: var(--muted); max-width: 760px; margin: 0; font-size: 16px; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin: 20px 0;
}
.card-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.card h2 { font-size: 19px; margin: 0; display: flex; align-items: center; gap: 10px; }
.step {
  display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: var(--accent-text); font-size: 14px;
}
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

/* Forms */
label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); font-weight: 500; }
label.inline { flex-direction: row; align-items: center; gap: 8px; }
input, select, textarea {
  font: inherit; font-size: 14px; color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: 7px;
  padding: 7px 9px; min-width: 0; width: 100%;
}
label.inline select { width: auto; }
textarea { resize: vertical; min-height: 34px; font-family: var(--mono); font-size: 13px; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible {
  outline: 2px solid var(--focus); outline-offset: 1px;
}
input[aria-invalid="true"], textarea[aria-invalid="true"] { border-color: var(--bad); background: var(--bad-soft); }

.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px 16px; margin-bottom: 16px; }
.span-2 { grid-column: span 2; }

.btn {
  font: inherit; font-size: 14px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  border-radius: 7px; padding: 8px 14px;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn.ghost { background: transparent; }
.btn.icon { padding: 4px 9px; font-size: 16px; line-height: 1; color: var(--muted); background: transparent; }
.btn.icon:hover { color: var(--bad); border-color: var(--bad); }

/* Budget table */
.table-scroll { position: relative; overflow-x: auto; margin: 0 -4px 12px; padding: 0 4px; }
table.budget { width: 100%; border-collapse: collapse; min-width: 900px; }
.budget th {
  text-align: left; font-size: 12px; font-weight: 600; color: var(--muted);
  text-transform: none; padding: 8px 6px; border-bottom: 1px solid var(--border); white-space: nowrap;
}
.budget td { padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: top; }
.budget .num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--mono); font-size: 13px; white-space: nowrap; }
.budget td.num { padding-top: 14px; }
.budget .col-name { width: 20%; }
.budget .col-method { width: 17%; }
.budget .col-input { width: 25%; }
.budget .col-c { width: 8%; }
.budget .col-dof { width: 7%; }
.budget .fields { display: flex; flex-wrap: wrap; gap: 6px; }
.budget .fields label { flex: 1 1 70px; font-size: 11px; }
.budget .fields label.wide { flex-basis: 100%; }
.row-error { color: var(--bad); font-size: 12px; margin-top: 4px; }
.dof-auto { font-family: var(--mono); font-size: 13px; color: var(--muted); padding-top: 7px; display: block; }

/* Results */
.results { margin-top: 16px; }
.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.kpi { background: var(--surface-2); border-radius: 8px; padding: 12px 14px; }
.kpi .k-label { font-size: 12px; color: var(--muted); }
.kpi .k-value { font-family: var(--mono); font-size: 20px; font-weight: 600; margin-top: 2px; font-variant-numeric: tabular-nums; }
.kpi.main { background: var(--accent-soft); }
.reported { margin: 12px 0 0; font-size: 15px; }
.reported strong { font-family: var(--mono); }
.notice { border-radius: 8px; padding: 10px 14px; font-size: 14px; margin-top: 12px; }
.notice.error { background: var(--bad-soft); color: var(--bad); }
.notice.info { background: var(--surface-2); color: var(--muted); }

.contrib { margin-top: 18px; }
.contrib h3, .results h3 { font-size: 14px; margin: 0 0 8px; color: var(--muted); font-weight: 600; }
.bar-row { display: grid; grid-template-columns: minmax(120px, 28%) 1fr 56px; gap: 10px; align-items: center; margin: 5px 0; font-size: 13px; }
.bar-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { display: block; background: var(--surface-2); border-radius: 4px; height: 12px; overflow: hidden; }
.bar-fill { display: block; background: var(--bar); height: 100%; border-radius: 4px; min-width: 2px; }
.bar-pct { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* Conformity */
.chart { margin: 4px 0 8px; }
.chart svg { width: 100%; height: auto; display: block; }
.chart .zone-ok { fill: var(--ok-soft); }
.chart .zone-guard { fill: var(--warn-soft); }
.chart .zone-out { fill: var(--bad-soft); }
.chart .limit { stroke: var(--text); stroke-width: 1.5; }
.chart .alimit { stroke: var(--warn); stroke-width: 1.5; stroke-dasharray: 4 3; }
.chart .axis { stroke: var(--border); stroke-width: 1; }
.chart .ubar { stroke: var(--accent); stroke-width: 2.5; }
.chart .point { fill: var(--accent); stroke: var(--surface); stroke-width: 2; }
.chart text { fill: var(--muted); font: 11px system-ui, sans-serif; }
.chart text.strong { fill: var(--text); font-weight: 600; }

.statement { border-radius: 8px; padding: 12px 14px; font-size: 15px; }
.statement strong { display: block; font-size: 16px; margin-bottom: 2px; }
.statement.pass { background: var(--ok-soft); }
.statement.pass strong { color: var(--ok); }
.statement.conditional-pass, .statement.conditional-fail { background: var(--warn-soft); }
.statement.conditional-pass strong, .statement.conditional-fail strong { color: var(--warn); }
.statement.fail { background: var(--bad-soft); }
.statement.fail strong { color: var(--bad); }
.facts { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 6px; font-size: 14px; }
.facts li { display: flex; gap: 8px; }
.facts .f-label { color: var(--muted); min-width: 220px; }
.facts .f-value { font-family: var(--mono); }
.hint { color: var(--warn); font-size: 13px; }

.verdict { border: 1px dashed var(--border); border-radius: 8px; padding: 14px 16px 2px; margin: 18px 0 0; }
.verdict legend { font-weight: 600; padding: 0 6px; font-size: 15px; }
.radio-row { display: flex; flex-wrap: wrap; gap: 18px; margin: 4px 0 14px; }
.radio { flex-direction: row; align-items: center; gap: 6px; font-size: 14px; color: var(--text); }
.radio input { width: auto; }

.muted { color: var(--muted); }
.small { font-size: 13px; }

.actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 10px; margin: 4px 0 28px; }
a.btn { text-decoration: none; display: inline-block; }

/* Pro teaser */
.pro { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px; align-items: center; background: var(--accent-soft); border-color: transparent; }
.pro h2 { margin: 2px 0 4px; }
.eyebrow { margin: 0; font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); }
.pro-list { margin: 10px 0 0; padding-left: 18px; }
.pro-list li { margin: 3px 0; }
.pro-cta { text-align: center; min-width: 200px; }
.pro-cta p { margin: 8px 0 0; }

/* Text pages */
.doc { max-width: 760px; padding-top: 28px; padding-bottom: 32px; }
.doc h1 { font-size: 30px; margin: 0 0 4px; letter-spacing: -0.02em; }
.doc h2 { font-size: 18px; margin: 28px 0 6px; }
.doc p, .doc li { line-height: 1.65; }
.doc code { font-family: var(--mono); font-size: 13px; background: var(--surface-2); padding: 1px 5px; border-radius: 4px; }

/* Guides */
.site-nav a[aria-current="page"] { color: var(--text); font-weight: 600; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.crumbs a { color: var(--muted); }
.byline { color: var(--muted); font-size: 14px; margin: 0 0 18px; }
.guide h2 { font-size: 21px; margin: 32px 0 8px; letter-spacing: -0.01em; }
.guide h3 { font-size: 16px; margin: 22px 0 6px; }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0 6px; font-size: 14px; }
.doc th, .doc td { border-bottom: 1px solid var(--border); padding: 7px 8px; text-align: left; vertical-align: top; }
.doc th { font-weight: 600; background: var(--surface-2); }
.doc td.num, .doc th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.doc .table-scroll { margin: 12px 0 6px; }
.doc .table-scroll table { margin: 0; min-width: 560px; }
.formula { font-family: var(--mono); font-size: 15px; background: var(--surface-2); border-radius: 8px; padding: 12px 14px; margin: 12px 0; overflow-x: auto; white-space: nowrap; }
.note { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 16px 0; }
.note p { margin: 4px 0; }
.cta { background: var(--accent-soft); border-radius: 12px; padding: 18px 20px; margin: 32px 0 8px; }
.cta p { margin: 0 0 12px; }
.related ul, .guide-list { padding-left: 18px; }
.related li { margin: 4px 0; }
.guide-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 12px; }
.guide-list li { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; display: grid; gap: 4px; }
.guide-list a { text-decoration: none; font-size: 17px; }
.guide-list span { color: var(--muted); font-size: 14px; line-height: 1.5; }

.site-footer { border-top: 1px solid var(--border); padding: 20px 0 32px; color: var(--muted); font-size: 13px; }
.site-footer p { margin: 6px 0; max-width: 860px; }

.print-only { display: none; }

@media (max-width: 760px) {
  .grid-3 { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-nav { gap: 12px; }
  .nav-anchor { display: none; }
  .toolbar { width: 100%; }
  label.inline { flex: 1; min-width: 0; }
  label.inline select { width: 100%; min-width: 0; }
  .facts li { flex-direction: column; gap: 0; }
  .facts .f-label { min-width: 0; }
  .pro { grid-template-columns: 1fr; }
  .pro-cta { text-align: left; min-width: 0; }
  .card { padding: 16px; }
}

@media print {
  :root { --bg: #fff; --surface: #fff; --shadow: none; }
  body { font-size: 11pt; }
  .site-header, .no-print, .site-nav { display: none !important; }
  .print-only { display: block; }
  .card { border: none; padding: 0; margin: 12px 0; break-inside: auto; }
  .table-scroll { overflow: visible; }
  table.budget { min-width: 0; font-size: 9pt; }
  input, select, textarea { border: none; padding: 0; background: transparent; }
  select { appearance: none; }
  .verdict { break-inside: avoid; }
  .site-footer { border: none; }
  a { color: inherit; text-decoration: none; }
}