/* =========================================================
   klima-zuhause.de – zentrale Gestaltung (für ALLE Seiten)
   Farben ändern? Einfach die Werte unter :root anpassen.
   ========================================================= */
:root {
  --blau: #0b5cab;          /* Hauptfarbe (Buttons, Links) */
  --blau-dunkel: #08427a;
  --eis: #e8f3fc;           /* heller Hintergrund */
  --tuerkis: #12a4b4;       /* Akzentfarbe */
  --text: #1c2733;
  --grau: #5b6b7b;
  --linie: #d9e3ec;
  --weiss: #ffffff;
  --ok: #1f8a4c;
  --radius: 14px;
  --max: 1140px;
  --schrift: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--schrift);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--weiss);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blau); }
a:hover { color: var(--blau-dunkel); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .6em; }
h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.45rem, 3vw, 2rem); margin-top: 1.6em; }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

/* ---------- Kopfzeile ---------- */
.topbar {
  background: var(--blau-dunkel); color: #fff; font-size: .9rem;
  text-align: center; padding: 6px 16px;
}
header.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.96); border-bottom: 1px solid var(--linie);
  backdrop-filter: blur(6px);
}
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 800; font-size: 1.25rem; }
.logo span.punkt { color: var(--tuerkis); }
.logo svg { width: 34px; height: 34px; }
.menu { display: flex; gap: 22px; list-style: none; margin: 0; padding: 0; }
.menu a { text-decoration: none; color: var(--text); font-weight: 600; }
.menu a:hover, .menu a[aria-current="page"] { color: var(--blau); }
.menu-btn { display: none; background: none; border: 1px solid var(--linie); border-radius: 8px; padding: 8px 12px; font-size: 1rem; cursor: pointer; }

@media (max-width: 820px) {
  .menu-btn { display: block; }
  .menu { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; gap: 0; background: #fff; border-bottom: 1px solid var(--linie); }
  .menu.offen { display: flex; }
  .menu li a { display: block; padding: 14px 16px; border-top: 1px solid var(--linie); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; background: var(--blau); color: #fff !important;
  padding: 14px 26px; border-radius: 999px; text-decoration: none;
  font-weight: 700; border: 0; cursor: pointer; font-size: 1rem;
  transition: background .2s, transform .2s;
}
.btn:hover { background: var(--blau-dunkel); transform: translateY(-1px); }
.btn.hell { background: #fff; color: var(--blau) !important; border: 2px solid var(--blau); }
.btn.hell:hover { background: var(--eis); }
.btn.gross { padding: 17px 32px; font-size: 1.08rem; }

/* ---------- Bereiche ---------- */
section { padding: 64px 0; }
.hintergrund-eis { background: var(--eis); }
.hero {
  background: linear-gradient(135deg, #e8f3fc 0%, #d6ecfa 55%, #c9f0f2 100%);
  padding: 72px 0 64px;
}
.hero-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.hero p.lead { font-size: 1.15rem; color: #2b3a49; }
.hero .aktionen { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.hero-bild {
  background: #fff; border-radius: 22px; padding: 24px;
  box-shadow: 0 20px 50px rgba(11,92,171,.15);
}
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }

.vertrauen { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 22px; padding: 0; list-style: none; font-weight: 600; color: #2b3a49; font-size: .95rem; }
.vertrauen li::before { content: "✓ "; color: var(--ok); font-weight: 800; }

.raster { display: grid; gap: 22px; }
.raster.drei { grid-template-columns: repeat(3, 1fr); }
.raster.zwei { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .raster.drei, .raster.zwei { grid-template-columns: 1fr; } }

.karte {
  background: #fff; border: 1px solid var(--linie); border-radius: var(--radius);
  padding: 26px; box-shadow: 0 4px 16px rgba(20,40,60,.05);
}
.karte .icon { font-size: 2rem; margin-bottom: 6px; }

/* ---------- Produktkarten ---------- */
.produkt { display: flex; flex-direction: column; }
.produkt .produktbild { background: var(--eis); border-radius: 10px; padding: 18px; margin-bottom: 16px; }
.produkt .preis { font-size: 1.5rem; font-weight: 800; color: var(--blau-dunkel); margin: 6px 0 4px; }
.produkt .klein { font-size: .9rem; color: var(--grau); }
.produkt ul { padding-left: 18px; margin: 8px 0 16px; }
.produkt .btn { margin-top: auto; text-align: center; }
.badge { display: inline-block; background: var(--tuerkis); color: #fff; font-size: .78rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; margin-bottom: 8px; }

/* ---------- Vorteile-Liste ---------- */
.vorteile { list-style: none; padding: 0; margin: 0 0 1.2em; }
.vorteile li { padding: 12px 0 12px 40px; position: relative; border-bottom: 1px dashed var(--linie); }
.vorteile li::before {
  content: "✓"; position: absolute; left: 0; top: 11px; width: 28px; height: 28px;
  border-radius: 50%; background: var(--ok); color: #fff; text-align: center; line-height: 28px; font-weight: 800;
}

/* ---------- Tabellen ---------- */
table { width: 100%; border-collapse: collapse; margin: 1em 0 1.5em; font-size: .97rem; }
th, td { padding: 11px 12px; border-bottom: 1px solid var(--linie); text-align: left; vertical-align: top; }
th { background: var(--eis); width: 42%; }
.tabelle-scroll { overflow-x: auto; }

/* ---------- FAQ ---------- */
details { background: #fff; border: 1px solid var(--linie); border-radius: 10px; padding: 0 18px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 700; padding: 16px 0; list-style: none; }
summary::after { content: "+"; float: right; font-size: 1.3rem; color: var(--blau); }
details[open] summary::after { content: "–"; }
details p { padding-bottom: 8px; }

/* ---------- Brotkrumen ---------- */
.breadcrumb { font-size: .9rem; color: var(--grau); padding: 14px 0 0; }
.breadcrumb a { color: var(--grau); }

/* ---------- Produktseite ---------- */
.produkt-kopf { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; padding: 26px 0 10px; }
@media (max-width: 860px) { .produkt-kopf { grid-template-columns: 1fr; } }
.kaufbox { background: var(--eis); border-radius: var(--radius); padding: 22px; margin: 18px 0; }
.kaufbox .preis { font-size: 2rem; font-weight: 800; color: var(--blau-dunkel); }
.lieferinfo { font-size: .92rem; color: var(--grau); margin-top: 10px; }
.textblock { max-width: 780px; }

/* ---------- Rechner ---------- */
.rechner { max-width: 820px; margin: 0 auto; }
.fortschritt { display: flex; gap: 6px; margin-bottom: 22px; }
.fortschritt span { flex: 1; height: 8px; border-radius: 4px; background: var(--linie); transition: background .3s; }
.fortschritt span.aktiv { background: var(--blau); }
.schritt { display: none; }
.schritt.aktiv { display: block; animation: rein .35s ease; }
@keyframes rein { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.schritt-nr { color: var(--tuerkis); font-weight: 800; text-transform: uppercase; font-size: .85rem; letter-spacing: .05em; }
.optionen { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin: 16px 0 22px; }
.option input { position: absolute; opacity: 0; pointer-events: none; }
.option label {
  display: block; height: 100%; cursor: pointer; background: #fff; border: 2px solid var(--linie);
  border-radius: 12px; padding: 16px; transition: border-color .2s, background .2s;
}
.option label strong { display: block; font-size: 1.02rem; }
.option label small { color: var(--grau); }
.option label .emoji { font-size: 1.6rem; display: block; margin-bottom: 4px; }
.option input:checked + label { border-color: var(--blau); background: var(--eis); }
.option input:focus-visible + label { outline: 3px solid var(--tuerkis); outline-offset: 2px; }
.regler-box { background: #fff; border: 2px solid var(--linie); border-radius: 12px; padding: 22px; margin: 16px 0 22px; }
.regler-wert { font-size: 2.2rem; font-weight: 800; color: var(--blau-dunkel); }
input[type=range] { width: 100%; accent-color: var(--blau); height: 30px; }
.regler-skala { display: flex; justify-content: space-between; font-size: .85rem; color: var(--grau); }
.schnellwahl { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.schnellwahl button { background: var(--eis); border: 1px solid var(--linie); border-radius: 999px; padding: 7px 14px; cursor: pointer; font-size: .92rem; }
.schnellwahl button:hover { border-color: var(--blau); }
.rechner-nav { display: flex; justify-content: space-between; gap: 10px; }
.zusatz { margin: 0 0 22px; }
.zusatz label { display: flex; align-items: center; gap: 10px; padding: 10px 0; cursor: pointer; }
.zusatz input { width: 20px; height: 20px; accent-color: var(--blau); }

.ergebnis { display: none; }
.ergebnis.aktiv { display: block; animation: rein .4s ease; }
.kennzahlen { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 18px 0; }
@media (max-width: 600px) { .kennzahlen { grid-template-columns: 1fr; } }
.kennzahl { background: #fff; border: 1px solid var(--linie); border-radius: 12px; padding: 18px; }
.kennzahl .label { font-size: .88rem; color: var(--grau); }
.kennzahl .wert { font-size: 1.8rem; font-weight: 800; color: var(--blau-dunkel); line-height: 1.2; }
.kennzahl .zusatz-info { font-size: .85rem; color: var(--grau); }
.kennzahl.highlight { background: var(--blau); color: #fff; border-color: var(--blau); }
.kennzahl.highlight .label, .kennzahl.highlight .zusatz-info { color: #d6e9fb; }
.kennzahl.highlight .wert { color: #fff; }
.empfehlung { border: 2px solid var(--ok); }
.hinweis { font-size: .88rem; color: var(--grau); }

/* ---------- Abschluss-Banner ---------- */
.cta-banner { background: linear-gradient(135deg, var(--blau) 0%, var(--tuerkis) 100%); color: #fff; border-radius: 22px; padding: 44px 32px; text-align: center; }
.cta-banner h2 { margin-top: 0; }
.cta-banner .btn { background: #fff; color: var(--blau) !important; }

/* ---------- Fußzeile ---------- */
footer.site { background: #0f1f2e; color: #c4d2df; padding: 48px 0 26px; font-size: .95rem; }
footer.site a { color: #e6eef5; text-decoration: none; }
footer.site a:hover { text-decoration: underline; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 28px; }
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
footer.site ul { list-style: none; padding: 0; margin: 0; }
footer.site li { margin-bottom: 6px; }
footer.site h3 { color: #fff; font-size: 1rem; }
.copyright { border-top: 1px solid #23384b; margin-top: 30px; padding-top: 18px; font-size: .85rem; }

/* =========================================================
   ERWEITERUNG: Shop-Aufbau (Mega-Menü, Kacheln, Tabs …)
   ========================================================= */
.topbar { display: flex; justify-content: center; gap: 22px; flex-wrap: wrap; }
.topbar a { color: #fff; }

/* Mega-Menü */
.menu > li { position: relative; }
.menu .hat-unter > a::after { content: " ▾"; font-size: .8em; }
.mega {
  display: none; position: absolute; top: 100%; left: -20px; min-width: 560px;
  background: #fff; border: 1px solid var(--linie); border-radius: 14px; padding: 22px;
  box-shadow: 0 18px 40px rgba(20,40,60,.12); grid-template-columns: 1fr 1fr; gap: 6px 30px; z-index: 60;
}
.menu li:hover > .mega, .menu li:focus-within > .mega { display: grid; }
.mega h4 { margin: 0 0 6px; font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--tuerkis); }
.mega ul { list-style: none; padding: 0; margin: 0 0 10px; }
.mega a { display: block; padding: 5px 0; font-weight: 500 !important; }
.mega .tag { font-size: .7rem; background: var(--tuerkis); color: #fff; border-radius: 999px; padding: 1px 7px; margin-left: 6px; vertical-align: 2px; }
.kopf-aktionen { display: flex; gap: 10px; align-items: center; }
.kopf-aktionen a { text-decoration: none; font-weight: 600; font-size: .95rem; }
@media (max-width: 820px) {
  .mega { position: static; display: grid; grid-template-columns: 1fr; min-width: 0; box-shadow: none; border: 0; border-radius: 0; padding: 0 16px 10px 28px; }
  .menu .hat-unter > a::after { content: ""; }
  .kopf-aktionen .ausblenden-mobil { display: none; }
}

/* Hero-Icons */
.hero-icons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 22px 0; }
.hero-icons div { background: rgba(255,255,255,.75); border-radius: 12px; padding: 12px; font-size: .92rem; font-weight: 600; }
.hero-icons span { display: block; font-size: 1.5rem; }
@media (max-width: 600px) { .hero-icons { grid-template-columns: 1fr; } }

/* Vertrauensleiste */
.trustleiste { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 36px; padding: 22px 0; border-bottom: 1px solid var(--linie); font-weight: 600; color: #2b3a49; }
.trustleiste span { white-space: nowrap; }

/* Kategorie-Kacheln */
.kacheln { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 860px) { .kacheln { grid-template-columns: repeat(2, 1fr); } }
.kachel { display: block; text-decoration: none; color: var(--text); background: #fff; border: 1px solid var(--linie); border-radius: 14px; padding: 22px 16px; text-align: center; transition: transform .2s, box-shadow .2s; }
.kachel:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(11,92,171,.12); color: var(--blau); }
.kachel .icon { font-size: 2.2rem; display: block; margin-bottom: 6px; }
.kachel strong { display: block; }
.kachel small { color: var(--grau); }

/* Promo-Banner */
.promo { display: grid; grid-template-columns: 1.3fr 1fr; gap: 30px; align-items: center; background: #0f1f2e; color: #fff; border-radius: 22px; padding: 40px; }
.promo h2 { margin-top: 0; }
.promo .gross-zahl { font-size: 3rem; font-weight: 800; color: #7cd3dc; line-height: 1; }
@media (max-width: 860px) { .promo { grid-template-columns: 1fr; padding: 28px; } }

/* 4 Schritte */
.schritte4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: s; }
@media (max-width: 860px) { .schritte4 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .schritte4 { grid-template-columns: 1fr; } }
.schritte4 > div { position: relative; background: #fff; border: 1px solid var(--linie); border-radius: 14px; padding: 46px 18px 18px; }
.schritte4 > div::before { counter-increment: s; content: counter(s); position: absolute; top: 14px; left: 18px; width: 26px; height: 26px; border-radius: 50%; background: var(--blau); color: #fff; text-align: center; line-height: 26px; font-weight: 800; font-size: .9rem; }

/* Produktkarten-Ergänzung */
.produkt .bild-link { display: block; }
.produkt h3 a { color: var(--text); text-decoration: none; }
.produkt h3 a:hover { color: var(--blau); }
.badges { display: flex; flex-wrap: wrap; gap: 6px; }
.badge.dunkel { background: var(--blau-dunkel); }
.badge.gruen { background: var(--ok); }
.raster.vier { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) { .raster.vier { grid-template-columns: 1fr; } }
.produkt[hidden] { display: none; }

/* Filter-Tabs */
.filter { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; }
.filter button { background: #fff; border: 1px solid var(--linie); border-radius: 999px; padding: 9px 16px; font-weight: 600; cursor: pointer; font-size: .95rem; }
.filter button.aktiv { background: var(--blau); color: #fff; border-color: var(--blau); }

/* Info-Tabs */
.tabs-kopf { display: flex; flex-wrap: wrap; gap: 6px; border-bottom: 2px solid var(--linie); margin-bottom: 18px; }
.tabs-kopf button { background: none; border: 0; padding: 12px 14px; font-weight: 700; cursor: pointer; color: var(--grau); border-bottom: 3px solid transparent; margin-bottom: -2px; font-size: .97rem; }
.tabs-kopf button.aktiv { color: var(--blau); border-bottom-color: var(--blau); }
.tab-inhalt { display: none; }
.tab-inhalt.aktiv { display: block; }

/* Kontakt-Block */
.kontakt-block { display: grid; grid-template-columns: 1.2fr 1fr; gap: 30px; align-items: center; background: var(--eis); border-radius: 22px; padding: 36px; }
@media (max-width: 860px) { .kontakt-block { grid-template-columns: 1fr; padding: 24px; } }
.team { display: flex; gap: 10px; flex-wrap: wrap; }
.team div { width: 64px; height: 64px; border-radius: 50%; background: #c9dbea; display: grid; place-items: center; font-weight: 800; color: var(--blau-dunkel); }

/* Link-Cluster "Beliebte Kategorien" */
.linkcluster { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; font-size: .95rem; }
@media (max-width: 860px) { .linkcluster { grid-template-columns: 1fr 1fr; } }
.linkcluster h3 { font-size: 1rem; }
.linkcluster ul { list-style: none; padding: 0; margin: 0; }
.linkcluster li { margin-bottom: 5px; }

/* Newsletter */
.newsletter { display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; align-items: center; }
.newsletter form { display: flex; gap: 8px; flex: 1; min-width: 280px; max-width: 480px; }
.newsletter input { flex: 1; padding: 13px 16px; border-radius: 999px; border: 1px solid var(--linie); font-size: 1rem; }

/* Ratgeber-Karten */
.ratgeber-karte { text-decoration: none; color: var(--text); display: block; }
.ratgeber-karte:hover h3 { color: var(--blau); }
.ratgeber-karte .icon { font-size: 2.4rem; background: var(--eis); border-radius: 10px; padding: 26px; text-align: center; margin-bottom: 14px; }
.lesezeit { font-size: .85rem; color: var(--grau); }
article.beitrag { max-width: 760px; }
article.beitrag h2 { font-size: 1.5rem; }

/* Footer-Ergänzung */
.footer-grid.sechs { grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr; }
@media (max-width: 960px) { .footer-grid.sechs { grid-template-columns: 1fr 1fr; } }
.zahlarten { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.zahlarten span { background: #23384b; border-radius: 6px; padding: 4px 9px; font-size: .8rem; color: #e6eef5; }
@media (max-width: 600px) { .topbar span:not(:last-child) { display: none; } }

/* ---------- Logo mit "Klima-zuhause.de by Diyair" ---------- */
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-by { display: flex; align-items: center; gap: 5px; font-size: .72rem; font-weight: 600; color: var(--grau); margin-top: 3px; }
.logo-by img { height: 15px; width: auto; display: inline-block; }

/* ---------- Vertrauens-Icons (Sicher bezahlen usw.) ---------- */
.vertrauen-band { background: #f5f9fd; border-bottom: 1px solid var(--linie); }
.vertrauen-icons { list-style: none; margin: 0; padding: 10px 0; display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; }
.vertrauen-icons li { display: flex; align-items: center; gap: 9px; font-size: .82rem; line-height: 1.25; }
.vertrauen-icons svg { width: 26px; height: 26px; flex: none; fill: none; stroke: var(--blau); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.vertrauen-icons strong { display: block; color: var(--text); }
.vertrauen-icons small { color: var(--grau); }
.vertrauen-icons.kompakt { grid-template-columns: 1fr 1fr; padding: 14px 0 0; margin-top: 14px; border-top: 1px solid #cfe0ef; }
@media (max-width: 1000px) { .vertrauen-icons { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 600px) {
  .vertrauen-band .vertrauen-icons { display: flex; overflow-x: auto; gap: 18px; scrollbar-width: none; }
  .vertrauen-band .vertrauen-icons li { flex: none; }
}
.produkt-kopf h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); }

/* Logo 10 % größer */
.logo { font-size: 1.375rem; }
.logo > svg { width: 37px; height: 37px; }
.logo-by { font-size: .8rem; }
.logo-by img { height: 16.5px; }