@font-face { font-family: "Source Sans 3"; font-style: normal; font-weight: 200 900; font-display: swap; src: url("/fonts/source-sans-3-latin.woff2") format("woff2"); }
@font-face { font-family: "Source Sans 3"; font-style: italic; font-weight: 200 900; font-display: swap; src: url("/fonts/source-sans-3-italic-latin.woff2") format("woff2"); }
@font-face { font-family: "Source Code Pro"; font-style: normal; font-weight: 200 900; font-display: swap; src: url("/fonts/source-code-pro-latin.woff2") format("woff2"); }

/* Pico setzt seine Farben auf :root:not([data-theme…]); dieselbe Spezifität ist nötig, damit diese Werte greifen. */
:root:not([data-theme=dark]) {
  --ground: #f4f7fb;
  --surface: #fff;
  --ink: #152536;
  --muted: #526476;
  --heading: #123b62;
  --accent: #005b99;
  --accent-pale: #eaf3fa;
  --line: #c9d7e4;
  --line-soft: #e1e9f1;
  --field-border: #8ea3b6;
  --ok: #17653b;
  --ok-pale: #e8f5ec;
  --chg: #8b4300;
  --chg-pale: #fff2df;
  --open: #a31d2c;
  --open-pale: #fbe9eb;
  --draft: #103b66;
  --draft-pale: #e6edf6;
  --focus: #e18b00;
  --button: #005b99;
  --button-hover: #004777;
  /* Picos eingebettete data:-Symbole blockiert die CSP (img-src 'self'); daher lokale Datei. */
  --pico-icon-chevron: url("/css/icons/chevron-down.svg");
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --ground: #101923;
    --surface: #182431;
    --ink: #e8eef5;
    --muted: #afbfce;
    --heading: #d9edfb;
    --accent: #69b9ec;
    --accent-pale: #183d5b;
    --line: #3c5367;
    --line-soft: #26384a;
    --field-border: #60778a;
    --ok: #8ad6a8;
    --ok-pale: #153c2a;
    --chg: #ffd08a;
    --chg-pale: #4c3217;
    --open: #ffafb9;
    --open-pale: #4a1c24;
    --draft: #b1d4f2;
    --draft-pale: #1b3149;
    --focus: #ffb347;
    --button: #1976ae;
    --button-hover: #2385be;
    --pico-icon-chevron: url("/css/icons/chevron-down-dark.svg");
  }
}
:root:not([data-theme=dark]), :root:not([data-theme]) {
  --pico-font-family-sans-serif: "Source Sans 3", "Segoe UI", system-ui, -apple-system, sans-serif;
  --pico-font-family-monospace: "Source Code Pro", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --pico-font-size: 103.125%;
  --pico-line-height: 1.55;
  --pico-border-radius: .5rem;
  --pico-background-color: var(--ground);
  --pico-color: var(--ink);
  --pico-muted-color: var(--muted);
  --pico-muted-border-color: var(--line-soft);
  --pico-primary: var(--accent);
  --pico-primary-underline: var(--accent);
  --pico-primary-hover: var(--accent);
  --pico-primary-hover-underline: var(--accent);
  --pico-primary-background: var(--button);
  --pico-primary-border: var(--button);
  --pico-primary-hover-background: var(--button-hover);
  --pico-primary-hover-border: var(--button-hover);
  --pico-primary-inverse: #fff;
  --pico-primary-focus: color-mix(in srgb, var(--accent) 28%, transparent);
  --pico-card-background-color: var(--surface);
  --pico-card-border-color: var(--line);
  --pico-card-sectioning-background-color: var(--surface);
  --pico-card-box-shadow: none;
  --pico-form-element-background-color: var(--surface);
  --pico-form-element-selected-background-color: var(--surface);
  --pico-form-element-border-color: var(--field-border);
  --pico-form-element-color: var(--ink);
  --pico-form-element-placeholder-color: var(--muted);
  --pico-form-element-active-background-color: var(--surface);
  --pico-form-element-active-border-color: var(--accent);
  --pico-form-element-focus-color: color-mix(in srgb, var(--accent) 28%, transparent);
  --pico-form-element-spacing-vertical: .65rem;
  --pico-form-element-spacing-horizontal: .8rem;
  --pico-table-border-color: var(--line-soft);
  --pico-code-background-color: var(--accent-pale);
  --pico-code-color: var(--ink);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) { color-scheme: dark; }
}

* { box-sizing: border-box; }
html, body { overflow-x: hidden; }
body { min-width: 320px; color: var(--ink); background: var(--ground); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.container { width: min(calc(100% - 2rem), 60rem); margin-inline: auto; padding-inline: 0; }
h1, h2, h3 { color: var(--heading); text-wrap: balance; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

/* Kopf und Fuß */
.site-header { border-bottom: 1px solid var(--line); background: var(--surface); }
.site-header nav { min-height: 4rem; padding-block: .5rem; }
.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--ink); font-weight: 700; text-decoration: none; letter-spacing: -.005em; }
.brand:hover { color: var(--ink); }
.brand-mark { display: inline-flex; min-width: 2.45rem; height: 2rem; align-items: center; justify-content: center; padding-inline: .3rem; border-radius: .4rem; color: #fff; background: var(--button); font-size: .78rem; font-weight: 700; letter-spacing: .02em; white-space: nowrap; }
.context { color: var(--muted); font-size: .9rem; }
.site-footer { margin-top: 1rem; border-top: 1px solid var(--line); }
.site-footer nav { min-height: 4rem; color: var(--muted); font-size: .9rem; }
.site-footer a { color: var(--accent); }
main.container { display: flex; flex-direction: column; gap: 2.25rem; padding-top: 2.5rem; padding-bottom: 2.5rem; }
main.container > * { min-width: 0; margin: 0; }

/* Seitenkopf wie ein Dokumentkopf */
.hero { display: flex; flex-direction: column; gap: .8rem; padding-bottom: 1.6rem; border-bottom: 3px solid var(--accent); }
.hero h1, .legal-card h1 { margin: 0; font-size: clamp(1.8rem, 4.4vw, 2.6rem); letter-spacing: -.01em; line-height: 1.15; }
.eyebrow { margin: 0; color: var(--accent); font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.lead { max-width: 68ch; margin: 0; color: var(--muted); font-size: 1.12rem; }

.notice { display: grid; grid-template-columns: auto 1fr; gap: .75rem; padding: .85rem 1rem; border-radius: .5rem; background: var(--draft-pale); }
.notice strong { display: block; color: var(--ink); }
.notice p { margin: .15rem 0 0; }
.notice-icon { color: var(--accent); font-size: 1.25rem; line-height: 1.2; }

/* Formular */
.calculator-card, .legal-card { margin: 0; padding: clamp(1.1rem, 3vw, 1.75rem); border: 1px solid var(--line); border-radius: .5rem; background: var(--surface); box-shadow: none; }
.calculator-card > header { margin: 0 0 1rem; padding: 0; border: 0; background: transparent; }
.calculator-card h2, .result h2, .sources h2 { margin: 0 0 .3rem; font-size: 1.45rem; }
.calculator-card header p { margin: 0; color: var(--muted); }
.form-section { margin: 0; padding: 1.25rem 0; border: 0; border-top: 1px solid var(--line-soft); }
.form-section:first-of-type { border-top: 0; padding-top: .25rem; }
.form-section legend { padding: 0 .35rem 0 0; margin-bottom: .6rem; color: var(--heading); font-size: 1.05rem; font-weight: 700; }
.form-section .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-bottom: 0; }
.form-section .grid > * { min-width: 0; }
label { color: var(--ink); font-weight: 600; }
label small { margin-top: .25rem; color: var(--muted); font-weight: 400; line-height: 1.4; }
.field-error { display: block; margin-top: .3rem; color: var(--open); font-size: .9rem; font-weight: 600; }
.errors { margin-bottom: 1.25rem; padding: .85rem 1rem; border-left: 3px solid var(--open); border-radius: 0 .5rem .5rem 0; color: var(--open); background: var(--open-pale); font-weight: 600; }
.errors p { margin: 0; }
.calculate-button { width: 100%; margin: .25rem 0 0; font-weight: 700; }
.compact-form-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.compact-form-grid > * { grid-column: span 2; min-width: 0; margin: 0; }
.compact-form-grid > #rentalCosts, .compact-form-grid > #ownerCosts, .compact-form-grid > .energy-source { grid-column: span 3; }
.heating-inputs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.heating-inputs > * { display: grid; grid-template-rows: 2.6rem auto 1fr; min-width: 0; margin: 0; }
.heating-inputs .field-label { line-height: 1.35; }
.warm-water-note { margin: .85rem 0; padding: .5rem .75rem; border-left: 3px solid var(--line); color: var(--muted); background: var(--accent-pale); font-size: .9rem; line-height: 1.4; }
.warm-water-note strong { color: var(--ink); }
.calculation-basis { margin: 1.25rem 0; padding: 1rem; border: 1px solid var(--line); border-radius: .5rem; background: var(--accent-pale); }
.calculation-basis > strong { color: var(--heading); }
.calculation-basis dl { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: .75rem; margin: .75rem 0; }
.calculation-basis dl div { display: grid; grid-template-rows: 2.8rem auto; min-width: 0; }
.calculation-basis dt { color: var(--muted); font-size: .85rem; }
.calculation-basis dd { margin: .15rem 0 0; color: var(--ink); font-weight: 700; font-variant-numeric: tabular-nums; }
.calculation-basis small { display: block; color: var(--muted); }

/* Auswahl des Datenjahrgangs */
.choice-page { max-width: 60rem; }
.mirror-choices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.mirror-choices article { display: flex; flex-direction: column; gap: .7rem; margin: 0; padding: 1.4rem; border: 1px solid var(--line); border-radius: .5rem; background: var(--surface); box-shadow: none; }
.mirror-choices article.recommended { border: 2px solid var(--accent); }
.mirror-choices h2, .mirror-choices p { margin: 0; }
.mirror-choices > article > p:not(.eyebrow) { color: var(--muted); }
.choice-button { display: block; margin-top: auto; padding: .7rem 1rem; border-radius: .4rem; color: #fff; background: var(--button); font-weight: 700; text-align: center; text-decoration: none; }
.choice-button:hover { color: #fff; background: var(--button-hover); }

/* Ergebnis */
.result { display: flex; flex-direction: column; gap: 1rem; }
.result-header { display: flex; align-items: start; justify-content: space-between; gap: 1rem; }
.result-header p { margin: 0; color: var(--muted); }
.rule-badge { display: inline-block; padding: .2rem .55rem; border-radius: .35rem; color: var(--ink); background: var(--accent-pale); font-family: var(--pico-font-family-monospace); font-size: .82rem; white-space: nowrap; }
.results-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .9rem; }
.result-card { display: flex; flex-direction: column; gap: .75rem; margin: 0; padding: 1rem 1.1rem; border: 1px solid var(--line); border-radius: .5rem; background: var(--surface); box-shadow: none; }
.result-card > header { margin: 0; padding: 0; border: 0; background: transparent; }
.result-card h3 { margin: 0; font-size: 1.1rem; }
.result-card table { margin: 0; font-size: .97rem; font-variant-numeric: tabular-nums; }
.result-card th, .result-card td { padding: .55rem 0; border-bottom: 1px solid var(--line-soft); background: transparent; }
.result-card th { width: 58%; color: var(--muted); font-weight: 600; }
.result-card td { color: var(--ink); font-weight: 700; text-align: right; }
.result-card tr:last-child th, .result-card tr:last-child td { border-bottom: 0; }
.status-note { display: flex; gap: .5rem; margin: auto 0 0; padding: .65rem .8rem; border-radius: .5rem; font-weight: 600; }
.status-note::before { content: ""; flex: none; width: .5rem; height: .5rem; margin-top: .55em; border-radius: 50%; background: currentColor; }
.status-note.ok { color: var(--ok); background: var(--ok-pale); }
.status-note.warn { color: var(--chg); background: var(--chg-pale); }
.area-note { margin: 0; padding-top: .9rem; border-top: 1px solid var(--line-soft); color: var(--muted); }
.area-note strong { color: var(--ink); }

/* Grundlagen und Rechtliches */
.sources { padding-top: 1.5rem; border-top: 1px solid var(--line); }
.sources h2 { font-size: 1.25rem; margin-bottom: .6rem; }
.sources p { max-width: 72ch; color: var(--muted); }
.sources p:last-child { margin-bottom: 0; }
.legal-card { display: flex; flex-direction: column; gap: .8rem; max-width: 48rem; }
.legal-card p { margin: 0; }
.login-page { max-width: 32rem; }

@media (max-width: 700px) {
  .container { width: calc(100vw - 2rem) !important; max-width: none; }
  main.container { padding-top: 1.75rem; }
  .site-header nav { align-items: center; }
  .site-header nav ul + ul { display: none; }
  .notice, .notice > div, .calculator-card, .form-section, .form-section .grid, .form-section label, .form-section input, .form-section select { min-width: 0; max-width: 100%; }
  .form-section input, .form-section select { display: block; width: 100% !important; }
  .lead, .notice p, label small { overflow-wrap: anywhere; }
  .form-section .grid, .compact-form-grid, .heating-inputs, .results-grid, .mirror-choices, .calculation-basis dl { grid-template-columns: minmax(0, 1fr); }
  .compact-form-grid > * { grid-column: auto; }
  .compact-form-grid > #rentalCosts, .compact-form-grid > #ownerCosts, .compact-form-grid > .energy-source { grid-column: auto; }
  .result-header { display: block; }
  .rule-badge { margin-top: .6rem; }
}
@media (max-width: 480px) {
  .notice { grid-template-columns: 1fr; gap: .35rem; }
  .notice-icon { display: none; }
  .calculator-card, .result-card { padding: 1rem; }
}