/* Kalkubit – Website kalkubit.de. Farben wie in der App (wwwroot/app.css), Handy zuerst, ohne fremde Ressourcen. */
:root {
  --primary: #0F766E; --primary-press: #0A524D; --primary-text: #0B5E57; --primary-soft: #E6F4F1; --primary-border: #9FD3C9;
  --bg: #F4F6F6; --surface: #FFFFFF; --surface-sub: #F8FAFA; --sunken: #E9EEEE; --border: #E1E7E6;
  --text: #17282B; --text-2: #3B4D50; --muted: #5B6C6F; --on-primary: #FFFFFF;
  --warn: #8A4E06; --warn-soft: #FFF5E5; --info-soft: #EAF2FC;
  --frame: #17282B; --shot-filter: none;
  --shadow: 0 1px 2px rgba(23, 40, 43, .06), 0 4px 14px rgba(23, 40, 43, .06);
  --shadow-big: 0 2px 6px rgba(23, 40, 43, .08), 0 18px 40px rgba(23, 40, 43, .12);
  --font: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 14px;
  color-scheme: light;
}
/* Augenschonend: warme Papierfarben, weniger Blauanteil (Werte wie in der App, Texte mindestens WCAG AA) */
:root[data-theme="eye"] {
  --primary: #2E6A5D; --primary-press: #22534A; --primary-text: #275A4F; --primary-soft: #E3E5CF; --primary-border: #B9C4A4;
  --bg: #F3EAD7; --surface: #FBF5E8; --surface-sub: #F7F0E0; --sunken: #EBE1CB; --border: #DDD1B6;
  --text: #3A2E21; --text-2: #4E4130; --muted: #6A5B46; --on-primary: #FFFDF6;
  --warn: #8A5310; --warn-soft: #F6E6C6; --info-soft: #E4E6DF;
  --frame: #3A2E21; --shot-filter: sepia(.18) brightness(.97);
  --shadow: 0 1px 2px rgba(58, 46, 33, .07), 0 4px 14px rgba(58, 46, 33, .07); --shadow-big: 0 2px 6px rgba(58, 46, 33, .08), 0 18px 40px rgba(58, 46, 33, .12);
  color-scheme: light;
}
/* Dunkel: nur über data-theme (gesetzt von /assets/site.js: gespeicherte Wahl oder Einstellung des Geräts) */
:root[data-theme="dark"] {
  --primary: #2BA597; --primary-press: #3DBBAC; --primary-text: #6FD3C5; --primary-soft: #133A37; --primary-border: #23665E;
  --bg: #0F1717; --surface: #172222; --surface-sub: #1B2727; --sunken: #223030; --border: #2A3939;
  --text: #E7EFEE; --text-2: #C3D0CE; --muted: #93A5A3; --on-primary: #06201D;
  --warn: #E2A24A; --warn-soft: #3A2A12; --info-soft: #172A40;
  --frame: #050A0A; --shot-filter: brightness(.9);
  --shadow: 0 1px 2px rgba(0, 0, 0, .3); --shadow-big: 0 2px 6px rgba(0, 0, 0, .35), 0 18px 40px rgba(0, 0, 0, .35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 17px; line-height: 1.55; overflow-wrap: break-word; }
h1, h2, h3 { line-height: 1.2; margin: 0; hyphens: auto; }
p { margin: 0; }
a { color: var(--primary-text); text-underline-offset: 2px; }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; border-radius: 4px; }
[hidden] { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
svg.i { width: 24px; height: 24px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.skip { position: absolute; left: 12px; top: -80px; z-index: 100; background: var(--primary); color: var(--on-primary); padding: 12px 18px; border-radius: 10px; font-weight: 700; text-decoration: none; }
.skip:focus { top: 12px; color: var(--on-primary); }

.wrap { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .wrap { padding: 0 28px; } }

/* Knöpfe */
.knopf { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 11px 20px; border-radius: 12px;
  font: inherit; font-weight: 700; font-size: 16px; line-height: 1.2; text-decoration: none; text-align: center; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.knopf:hover { background: var(--sunken); color: var(--text); }
.knopf.primaer { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.knopf.primaer:hover { background: var(--primary-press); border-color: var(--primary-press); color: var(--on-primary); }
.knopf.klein { min-height: 44px; padding: 8px 14px; font-size: 15px; }
.knopf svg.i { width: 20px; height: 20px; }

/* Kopf */
.kopf { position: sticky; top: 0; z-index: 50; background: var(--surface); border-bottom: 1px solid var(--border); }
.kopf-innen { display: flex; align-items: center; gap: 10px; min-height: 64px; }
.marke { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 800; font-size: 20px; margin-right: auto; border-radius: 10px; }
.marke:hover { color: var(--text); }
.marke svg { width: 36px; height: 36px; flex: none; }
.nav { display: none; }
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; }
.nav a { display: block; padding: 10px 12px; border-radius: 10px; color: var(--text-2); font-weight: 600; font-size: 16px; text-decoration: none; }
.nav a:hover { background: var(--sunken); color: var(--text); }
.symbol-knopf { display: inline-grid; place-items: center; width: 44px; height: 44px; flex: none; border-radius: 12px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; padding: 0; }
.symbol-knopf:hover { background: var(--sunken); }
.symbol-knopf svg.i { width: 22px; height: 22px; }
/* Auswahlmenü der Darstellung (site.js, wie in der App); Lage setzt das Skript per element.style */
.theme-menu { position: fixed; z-index: 90; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-big); padding: 6px; display: grid; gap: 2px; }
.theme-menu button { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 48px; padding: 8px 12px; border: 0; border-radius: 10px; background: transparent; font: inherit; font-size: 16px; line-height: 1.3; text-align: left; color: var(--text); cursor: pointer; }
.theme-menu button:hover, .theme-menu button:focus-visible { background: var(--surface-sub); }
.theme-menu button:focus-visible { outline-offset: -3px; }
.theme-menu button.on { background: var(--primary-soft); color: var(--primary-text); }
.theme-menu button span { display: grid; }
.theme-menu small { color: var(--muted); font-size: 13px; }
.theme-menu button.on small { color: var(--text-2); }
.theme-menu svg.i { width: 22px; height: 22px; }
.no-js .theme-knopf, .no-js .menu-knopf { display: none; }
.menu-knopf .zu { display: none; }
.kopf.offen .menu-knopf .zu { display: block; }
.kopf.offen .menu-knopf .auf { display: none; }

@media (max-width: 899.98px) {
  .kopf .anmelden-kopf { padding: 8px 12px; }
  .js .kopf.offen .nav { display: block; position: absolute; left: 0; right: 0; top: 100%; background: var(--surface); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-big); padding: 8px 16px 16px; }
  .js .kopf.offen .nav ul { flex-direction: column; }
  .js .kopf.offen .nav a { padding: 14px 12px; font-size: 17px; border-bottom: 1px solid var(--border); border-radius: 0; }
  .js .kopf.offen .nav li:last-child a { border-bottom: 0; }
  /* Ohne Skript: Navigation als zweite Zeile */
  .no-js .kopf-innen { flex-wrap: wrap; }
  .no-js .nav { display: block; order: 5; width: 100%; padding-bottom: 8px; }
  .no-js .nav ul { flex-wrap: wrap; }
}
@media (max-width: 380px) {
  .marke { font-size: 18px; gap: 8px; }
  .marke svg { width: 32px; height: 32px; }
  .kopf-innen { gap: 8px; }
}
@media (min-width: 900px) {
  .nav { display: block; }
  .menu-knopf { display: none !important; }
  .kopf-innen { gap: 12px; min-height: 72px; }
}

/* Abschnitte */
main { display: block; flex: 1 0 auto; }
main:focus { outline: none; }
.abschnitt { padding: 48px 0; }
.abschnitt.hell { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
@media (min-width: 768px) { .abschnitt { padding: 72px 0; } }
.abschnitt-kopf { max-width: 720px; margin-bottom: 28px; }
.abschnitt-kopf h2 { font-size: 27px; letter-spacing: -.01em; }
.abschnitt-kopf p { margin-top: 10px; color: var(--text-2); font-size: 18px; }
@media (min-width: 768px) { .abschnitt-kopf h2 { font-size: 34px; } .abschnitt-kopf { margin-bottom: 36px; } }
.etikett { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; background: var(--warn-soft); color: var(--warn); font-weight: 700; font-size: 14px; line-height: 1.3; }
.etikett::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; flex: none; }
.etikett.geplant { background: var(--sunken); color: var(--text-2); }
.etikett.geplant::before { display: none; }

/* Start: Hero */
.hero { padding: 36px 0 48px; background: linear-gradient(180deg, var(--primary-soft) 0%, var(--bg) 100%); }
.hero-raster { display: grid; gap: 36px; align-items: center; }
.hero h1 { font-size: 32px; letter-spacing: -.02em; margin-top: 16px; }
.hero .einleitung { margin-top: 16px; font-size: 18px; color: var(--text-2); max-width: 600px; }
.hero .knopf-reihe { margin-top: 24px; }
.hero .hinweis { margin-top: 16px; font-size: 15px; color: var(--muted); }
.knopf-reihe { display: flex; flex-wrap: wrap; gap: 12px; }
@media (max-width: 479.98px) { .hero .knopf-reihe .knopf { flex: 1 1 100%; } }
@media (min-width: 768px) { .hero { padding: 56px 0 72px; } .hero h1 { font-size: 44px; } .hero .einleitung { font-size: 19px; } }
@media (min-width: 1024px) { .hero-raster { grid-template-columns: 1fr 1.3fr; gap: 48px; } .hero h1 { font-size: 50px; } }

/* Geräte-Rahmen für Bildschirmfotos */
.geraete { position: relative; margin: 0 12px 0 0; padding: 0 0 28px; }
.pc-rahmen { border-radius: 12px; overflow: hidden; border: 1px solid var(--border); background: var(--surface); box-shadow: var(--shadow-big); }
.pc-rahmen .leiste { display: flex; gap: 6px; align-items: center; height: 26px; padding: 0 12px; background: var(--sunken); border-bottom: 1px solid var(--border); }
.pc-rahmen .leiste span { width: 9px; height: 9px; border-radius: 50%; background: var(--border); }
.pc-rahmen img, .handy-rahmen img { width: 100%; filter: var(--shot-filter); }
.handy-rahmen { border: 7px solid var(--frame); border-radius: 30px; overflow: hidden; background: var(--frame); box-shadow: var(--shadow-big); }
.handy-rahmen img { border-radius: 22px; }
.geraete .handy-rahmen { position: absolute; right: -12px; bottom: 0; width: 31%; min-width: 108px; border-width: 5px; border-radius: 22px; }
.geraete .handy-rahmen img { border-radius: 16px; }
@media (min-width: 768px) { .geraete .handy-rahmen { border-width: 7px; border-radius: 30px; } .geraete .handy-rahmen img { border-radius: 22px; } }

/* Funktionen */
.karten { display: grid; gap: 14px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .karten { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .karten { grid-template-columns: 1fr 1fr 1fr; gap: 18px; } }
.karte { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.abschnitt.hell .karte { background: var(--surface-sub); box-shadow: none; }
.karte h3 { font-size: 19px; margin-top: 14px; }
.karte p { margin-top: 8px; color: var(--text-2); font-size: 16px; }
.symbol { display: inline-grid; place-items: center; flex: none; width: 48px; height: 48px; border-radius: 12px; background: var(--primary-soft); color: var(--primary-text); }
.erklaerung { color: var(--muted); }

.alle { margin-top: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.alle > summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 20px; font-weight: 700; font-size: 18px; border-radius: var(--radius); }
.alle > summary::-webkit-details-marker { display: none; }
.alle > summary::after, .faq summary::after { content: "+"; display: inline-grid; place-items: center; width: 32px; height: 32px; flex: none; border-radius: 50%; background: var(--primary-soft); color: var(--primary-text); font-size: 22px; font-weight: 700; line-height: 1; }
.alle[open] > summary::after, .faq details[open] summary::after { content: "–"; }
.alle-inhalt { display: grid; gap: 24px; padding: 4px 20px 24px; }
@media (min-width: 768px) { .alle-inhalt { grid-template-columns: 1fr 1fr; gap: 28px 36px; } }
.alle-inhalt h3 { font-size: 17px; color: var(--primary-text); margin-bottom: 8px; }
.alle-inhalt h3.abstand { margin-top: 24px; }
.liste { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.liste li { position: relative; padding-left: 28px; color: var(--text-2); font-size: 16px; }
.liste li::before { content: ""; position: absolute; left: 2px; top: .38em; width: 14px; height: 8px; border-left: 2.5px solid var(--primary); border-bottom: 2.5px solid var(--primary); transform: rotate(-45deg); }

/* Ablauf */
.schritte { display: grid; gap: 40px; counter-reset: schritt; }
.schritt { display: grid; gap: 20px; align-items: center; }
.schritt .nummer { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: var(--on-primary); font-weight: 800; font-size: 18px; }
.schritt h3 { font-size: 23px; margin-top: 12px; }
.schritt p { margin-top: 10px; color: var(--text-2); }
.schritt .liste { margin-top: 14px; }
.bildhinweis { margin-top: 32px; }
.schritt .bild-handy { max-width: 300px; width: 78%; margin: 0 auto; }
@media (min-width: 900px) {
  .schritte { gap: 56px; }
  .schritt { grid-template-columns: 1fr 1.25fr; gap: 48px; }
  .schritt.umgekehrt { grid-template-columns: 1.25fr 1fr; }
  .schritt.umgekehrt .text { order: 2; }
  .schritt h3 { font-size: 27px; }
}

/* Ihre Daten */
.daten-raster { display: grid; gap: 14px; }
@media (min-width: 768px) { .daten-raster { grid-template-columns: 1fr 1fr; gap: 18px; } }
.daten-punkt { display: flex; gap: 14px; align-items: flex-start; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.daten-punkt h3 { font-size: 18px; }
.daten-punkt p { margin-top: 6px; color: var(--text-2); font-size: 16px; }
.daten-punkt .etikett { margin-top: 10px; }

/* Preise und Kontakt */
.zwei { display: grid; gap: 18px; }
@media (min-width: 900px) { .zwei { grid-template-columns: 1fr 1fr; gap: 24px; } }
.kasten { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.kasten h2 { font-size: 26px; }
.kasten p { margin-top: 12px; color: var(--text-2); }
.kasten .knopf-reihe { margin-top: 20px; }
.kasten.betont { border: 2px solid var(--primary); }
.mail { font-weight: 700; }
.klein-text { font-size: 15px; color: var(--muted); }

/* FAQ */
.faq { display: grid; gap: 10px; max-width: 860px; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.faq summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 16px 18px; font-weight: 700; font-size: 17px; border-radius: var(--radius); }
.faq summary::-webkit-details-marker { display: none; }
.faq details > p { padding: 0 18px 18px; color: var(--text-2); }

/* Fuß */
.fuss { background: var(--surface); border-top: 1px solid var(--border); padding: 32px 0 calc(32px + env(safe-area-inset-bottom)); font-size: 15px; color: var(--muted); }
.fuss-raster { display: grid; gap: 20px; }
@media (min-width: 768px) { .fuss-raster { grid-template-columns: 1fr auto; align-items: center; } }
.fuss .marke { font-size: 18px; }
.fuss .marke svg { width: 30px; height: 30px; }
.fuss p { margin-top: 8px; }
.fuss ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 6px; }
.fuss ul a { display: inline-block; padding: 10px 10px; color: var(--text-2); font-weight: 600; text-decoration: none; border-radius: 8px; }
.fuss ul a:hover { background: var(--sunken); color: var(--text); }

/* Textseiten (Impressum, Datenschutz, 404) */
.textseite { padding: 32px 0 56px; }
.textseite .wrap { max-width: 820px; }
.textseite h1 { font-size: 32px; letter-spacing: -.01em; }
.textseite h2 { font-size: 21px; margin-top: 32px; }
.textseite p, .textseite address, .textseite ul { margin-top: 10px; color: var(--text-2); }
.textseite address { font-style: normal; }
.textseite ul { padding-left: 22px; }
.textseite li + li { margin-top: 6px; }
.textseite .stand { margin-top: 36px; font-size: 15px; color: var(--muted); }
.textseite .knopf-reihe { margin-top: 24px; }
@media (min-width: 768px) { .textseite { padding: 48px 0 72px; } .textseite h1 { font-size: 40px; } }