@font-face {
  font-family: "Instrument Sans";
  src: url("/beispiel/reinigung/fonts/instrument-sans.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}

:root {
  --ink: #101820;
  --ink-soft: #46535f;
  --paper: #ffffff;
  --tint: #eef2f4;
  --line: #d5dde2;
  /* Eigener Ton fuer Bedienelemente: --line erreicht gegen Weiss nur 1.38:1, WCAG 1.4.11 verlangt 3:1. */
  --line-control: #6b7681;
  --signal: #0b5bd3;
  --signal-dark: #0a49a8;
  --wash: #e3edfb;
  --radius: 14px;
  --wrap: 1180px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Instrument Sans", system-ui, -apple-system, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.1; letter-spacing: -0.02em; margin: 0; font-weight: 600; }
h1 { font-size: clamp(2.4rem, 5.2vw, 3.9rem); }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; }
p { margin: 0 0 1rem; }
img { max-width: 100%; height: auto; display: block; }

a { color: var(--signal-dark); text-underline-offset: 3px; }
a:hover { color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap { width: min(var(--wrap), 100% - 2.5rem); margin-inline: auto; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 50;
  background: var(--ink); color: #fff; padding: 0.8rem 1.2rem; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }
.skip, .skip:hover, .skip:focus, .skip:focus-visible { color: #fff; }

/* Demo hint ---------------------------------------------------------------- */
.demo-note { background: var(--ink); color: #dfe7ee; font-size: 0.9rem; }
.demo-note p { margin: 0; padding: 0.7rem 0; }
.demo-note a { color: #fff; }
.demo-note a:focus-visible { outline-color: #fff; }

/* Header ------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; min-height: 72px; padding-block: 0.6rem; }

.brand { display: flex; align-items: center; gap: 0.7rem; font-weight: 600; font-size: 1.15rem; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand small { display: block; font-weight: 400; font-size: 0.78rem; color: var(--ink-soft); letter-spacing: 0; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 7px; flex: none;
  background: var(--signal);
  box-shadow: inset 0 0 0 5px #fff, inset 0 0 0 7px var(--signal);
}

.site-nav { margin-left: auto; }
.site-nav ul { display: flex; gap: 1.6rem; list-style: none; margin: 0; padding: 0; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-size: 0.97rem; }
.site-nav a:hover { color: var(--ink); text-decoration: underline; }

.btn {
  display: inline-block; background: var(--signal); color: #fff; text-decoration: none;
  padding: 0.85rem 1.5rem; border-radius: 999px; font-weight: 600; font-size: 1rem;
  border: 2px solid var(--signal); cursor: pointer;
}
.btn:hover { background: var(--signal-dark); border-color: var(--signal-dark); color: #fff; }
.btn-small { padding: 0.55rem 1.1rem; font-size: 0.95rem; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: #fff; }

/* Hero --------------------------------------------------------------------- */
.hero { padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2rem, 4vw, 3rem); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.hero-text .lead { font-size: 1.15rem; color: var(--ink-soft); max-width: 46ch; margin-top: 1.2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin: 1.8rem 0 2.2rem; }

.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin: 0; border-top: 1px solid var(--line); padding-top: 1.2rem; }
.facts dt { font-size: 0.82rem; color: var(--ink-soft); }
.facts dd { margin: 0.25rem 0 0; font-weight: 600; font-size: 1.05rem; }

.hero-figure { margin: 0; }
.hero-figure img { border-radius: var(--radius); aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }

/* Sections ----------------------------------------------------------------- */
.section { padding: clamp(3rem, 7vw, 5.5rem) 0; }
.section-tint { background: var(--tint); }
.section-head { max-width: 58ch; margin-bottom: 2.5rem; }
.section-head p { color: var(--ink-soft); margin-top: 0.8rem; }

/* Service cards ------------------------------------------------------------ */
.cards { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
.cards li { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem 1.5rem 1.4rem; background: var(--paper); }
.cards .num { font-size: 0.85rem; font-weight: 600; color: var(--signal); letter-spacing: 0.08em; }
.cards h3 { margin: 0.7rem 0 0.6rem; }
.cards p { color: var(--ink-soft); font-size: 0.99rem; }
.cards .meta { margin: 1rem 0 0; padding-top: 0.8rem; border-top: 1px solid var(--line); font-size: 0.88rem; color: var(--ink); font-weight: 600; }

/* Calculator --------------------------------------------------------------- */
.calc-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.calc-intro p { color: var(--ink-soft); margin-top: 1rem; }
.calc-intro .note { font-size: 0.92rem; border-left: 3px solid var(--signal); padding-left: 1rem; color: var(--ink); }

.calc { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2rem); }
.calc fieldset { border: 0; margin: 0; padding: 0; }
.calc legend { font-weight: 600; font-size: 1.05rem; padding: 0 0 0.9rem; }

.field { margin-bottom: 1.1rem; }
.field label { display: block; font-size: 0.93rem; font-weight: 600; margin-bottom: 0.4rem; }
.field input[type="text"], .field input[type="email"], .field input[type="number"], .field select, .field textarea {
  width: 100%; font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--line-control); border-radius: 10px; padding: 0.7rem 0.85rem;
}
.field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%), linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%); background-position: calc(100% - 20px) 55%, calc(100% - 14px) 55%; background-size: 6px 6px, 6px 6px; background-repeat: no-repeat; padding-right: 2.6rem; }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { border-color: var(--signal); }
.field .hint { font-size: 0.85rem; color: var(--ink-soft); margin: 0.4rem 0 0; }
.field .pflicht, .field .optional { font-weight: 400; color: var(--ink-soft); font-size: 0.85rem; }
.field-check { display: flex; align-items: center; gap: 0.6rem; }
.field-check input { width: 1.15rem; height: 1.15rem; accent-color: var(--signal); }
.field-check label { margin: 0; font-weight: 400; font-size: 0.99rem; }

.result { display: block; margin-top: 1.4rem; padding: 1.3rem 1.4rem; background: var(--wash); border-radius: 12px; }
.result-label { margin: 0; font-size: 0.85rem; color: var(--ink-soft); }
.result-value { margin: 0.2rem 0 0.4rem; font-size: clamp(1.9rem, 4vw, 2.5rem); font-weight: 600; letter-spacing: -0.03em; line-height: 1.1; }
.result-detail { margin: 0; font-size: 0.93rem; color: var(--ink-soft); }
.calc-foot { margin: 1rem 0 0; font-size: 0.85rem; color: var(--ink-soft); }

/* Steps -------------------------------------------------------------------- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.5rem; counter-reset: step; }
.steps li { position: relative; padding-top: 1.6rem; border-top: 2px solid var(--ink); counter-increment: step; }
.steps li::before { content: counter(step, decimal-leading-zero); position: absolute; top: 1.5rem; right: 0; font-size: 0.85rem; font-weight: 600; color: var(--signal); }
.steps h3 { margin-bottom: 0.5rem; }
.steps p { color: var(--ink-soft); font-size: 0.99rem; }
.steps .duration { font-size: 0.85rem; font-weight: 600; }

/* Split -------------------------------------------------------------------- */
.split { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.split-figure { margin: 0; }
.split-figure img { border-radius: var(--radius); aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.split-text p { color: var(--ink-soft); margin-top: 1rem; }
.list { list-style: none; margin: 1.5rem 0; padding: 0; display: grid; gap: 0.9rem; }
.list li { padding-left: 1.4rem; position: relative; color: var(--ink-soft); }
.list li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 8px; height: 8px; border-radius: 2px; background: var(--signal); }
.list strong { color: var(--ink); }

blockquote { margin: 2rem 0 0; padding: 1.3rem 1.5rem; background: var(--tint); border-radius: var(--radius); }
blockquote p { font-size: 1.1rem; margin-bottom: 0.7rem; }
blockquote footer { font-size: 0.88rem; color: var(--ink-soft); }

/* Contact ------------------------------------------------------------------ */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.contact-grid > div > p { color: var(--ink-soft); margin-top: 1rem; max-width: 44ch; }
.contact-facts { margin: 2rem 0 0; display: grid; gap: 1rem; }
.contact-facts div { display: grid; grid-template-columns: 8.5rem minmax(0, 1fr); gap: 1rem; border-top: 1px solid var(--line); padding-top: 0.8rem; }
.contact-facts dd { margin: 0; overflow-wrap: anywhere; }
.contact-facts dt { font-size: 0.9rem; color: var(--ink-soft); }
.contact-facts dd { margin: 0; font-weight: 600; }
.muted { font-weight: 400; color: var(--ink-soft); font-size: 0.9rem; }

.form { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2rem); }
.form .error { color: #a4161a; font-size: 0.88rem; margin: 0.4rem 0 0; font-weight: 600; }
.form .field input[aria-invalid="true"], .form .field textarea[aria-invalid="true"] { border-color: #a4161a; }
.form-note { margin: 1rem 0 0; font-size: 0.92rem; color: var(--ink-soft); min-height: 1.4em; }

/* Footer ------------------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--line); padding: 2.5rem 0; margin-top: 1rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: space-between; align-items: center; }
.footer-links { list-style: none; display: flex; flex-wrap: wrap; gap: 1.4rem; margin: 0; padding: 0; font-size: 0.95rem; }

@media (max-width: 900px) {
  .hero-grid, .calc-grid, .split, .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .split-figure { order: 2; }
  .site-nav { display: none; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* 1.4.10 Reflow: unter 480px bleibt neben der 8.5rem-Spalte zu wenig Platz, die Seite bekam
   dadurch bei 320 CSS-Pixeln waagerechtes Scrollen (gemessen 367px Inhalt). Untereinander
   gestellt braucht dieselbe Liste keine Mindestbreite mehr. */
@media (max-width: 480px) {
  .contact-facts div { grid-template-columns: minmax(0, 1fr); gap: 0.2rem; }
  .facts { grid-template-columns: minmax(0, 1fr); }
}