/* ── Reset & Base ─────────────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{background:var(--c-bg);color:var(--c-text);font-family:var(--font-body);line-height:1.65;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:var(--c-link);text-decoration:none}
a:hover{text-decoration:underline}
ul{list-style:none}
input,button,select{font-family:inherit}

/* ── Utility ──────────────────────────────────────────────────────────────── */
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(1rem,4vw,2rem)}
.accent{color:var(--c-volt)}
.section-sub{color:var(--c-text-muted);max-width:60ch;margin-bottom:2rem}

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.7rem 1.4rem;border-radius:var(--r-md);font-weight:600;font-size:.95rem;cursor:pointer;border:none;transition:all .18s;white-space:nowrap;text-decoration:none}
.btn-primary{background:var(--c-accent);color:#000}
.btn-primary:hover{background:var(--c-accent-dim);text-decoration:none}
.btn-volt{background:var(--c-volt);color:#000}
.btn-volt:hover{background:var(--c-volt-dim);text-decoration:none}
.btn-outline{background:transparent;color:var(--c-text);border:1.5px solid var(--c-border)}
.btn-outline:hover{border-color:var(--c-accent);color:var(--c-accent);text-decoration:none}
.btn-ghost{background:transparent;color:var(--c-text-muted);border:1.5px solid var(--c-border)}
.btn-ghost:hover{color:var(--c-text);text-decoration:none}
.btn-lg{padding:.9rem 2rem;font-size:1.05rem;border-radius:var(--r-lg)}

/* ── Tags / Badges ────────────────────────────────────────────────────────── */
.tag{display:inline-block;padding:.2rem .7rem;border-radius:99px;font-size:.78rem;font-weight:600;background:var(--c-surface-2);color:var(--c-accent);border:1px solid var(--c-border)}
.badge{display:inline-block;padding:.15rem .6rem;border-radius:99px;font-size:.75rem;font-weight:600;background:var(--c-surface-2);color:var(--c-text-muted);border:1px solid var(--c-border)}
.badge-oeko{background:#0f2a1a;color:var(--c-green);border-color:#1a4a2a}

/* ── Header ───────────────────────────────────────────────────────────────── */
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,12,16,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--c-border)}
.header-inner{display:flex;align-items:center;gap:1.5rem;padding-block:.9rem}
.logo img{height:36px;width:auto}
.main-nav ul{display:flex;gap:1.5rem}
.main-nav a{color:var(--c-text-muted);font-weight:500;font-size:.95rem;transition:color .15s}
.main-nav a:hover{color:var(--c-text);text-decoration:none}
.nav-cta{margin-left:auto}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:.5rem}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--c-text);border-radius:2px;transition:.2s}
@media(max-width:720px){
  .main-nav,.nav-cta{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .main-nav.open{display:flex;position:fixed;inset:0;top:60px;background:var(--c-surface);flex-direction:column;padding:2rem;z-index:99}
  .main-nav.open ul{flex-direction:column;gap:1rem}
  .main-nav.open a{font-size:1.2rem}
  .nav-cta.open{display:flex}
}

/* ── Hero ─────────────────────────────────────────────────────────────────── */
.hero{padding:clamp(3rem,8vw,6rem) 0;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(184,255,87,.07) 0%,transparent 60%)}
.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}
.hero h1{font-family:var(--font-head);font-size:clamp(2rem,5vw,3.5rem);font-weight:800;line-height:1.1;margin-bottom:1rem}
.hero-sub{font-size:1.15rem;color:var(--c-text-muted);margin-bottom:2rem;max-width:50ch}
.hero-sub strong{color:var(--c-volt)}
.hero-form{display:flex;flex-direction:column;gap:1rem;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-lg);padding:1.5rem}
.form-group{display:flex;flex-direction:column;gap:.4rem}
.form-group label{font-size:.85rem;font-weight:600;color:var(--c-text-muted)}
.form-group input{padding:.7rem 1rem;background:var(--c-surface-2);border:1px solid var(--c-border);border-radius:var(--r-sm);color:var(--c-text);font-size:1rem}
.form-group input:focus{outline:2px solid var(--c-volt);border-color:transparent}
.consumption-pills{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem;align-items:center}
.consumption-pills span{font-size:.85rem;color:var(--c-text-muted)}
.pill{background:var(--c-surface-2);border:1px solid var(--c-border);border-radius:var(--r-md);padding:.4rem .8rem;color:var(--c-text-muted);font-size:.8rem;cursor:pointer;transition:.15s;text-align:center;line-height:1.3}
.pill:hover,.pill.active{border-color:var(--c-volt);color:var(--c-volt)}
.pill small{display:block;color:inherit;opacity:.8}
.hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.stat-card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-md);padding:1.2rem;text-align:center}
.stat-num{display:block;font-family:var(--font-head);font-size:1.5rem;font-weight:800;color:var(--c-volt);line-height:1.2;margin-bottom:.3rem}
.stat-label{font-size:.8rem;color:var(--c-text-muted)}
.hero--slim{padding:2.5rem 0}
.hero--slim h1{font-family:var(--font-head);font-size:clamp(1.5rem,4vw,2.5rem);font-weight:800;margin-bottom:.5rem}
@media(max-width:860px){
  .hero-inner{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
}

/* ── Trust Bar ────────────────────────────────────────────────────────────── */
.trust-bar{background:var(--c-surface);border-block:1px solid var(--c-border);padding:1rem 0}
.trust-inner{display:flex;flex-wrap:wrap;gap:1.5rem;justify-content:center}
.trust-item{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--c-text-muted)}
.trust-item svg{width:18px;height:18px;color:var(--c-volt)}

/* ── How it works ─────────────────────────────────────────────────────────── */
.how-it-works{padding:clamp(3rem,6vw,5rem) 0;text-align:center}
.how-it-works h2{font-family:var(--font-head);font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;margin-bottom:2.5rem}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem}
.step{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-lg);padding:2rem 1.5rem;position:relative}
.step-num{position:absolute;top:-1rem;left:50%;transform:translateX(-50%);background:var(--c-volt);color:#000;width:2rem;height:2rem;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem}
.step svg{width:2.5rem;height:2.5rem;color:var(--c-accent);margin-inline:auto;margin-bottom:1rem}
.step h3{font-family:var(--font-head);font-size:1.1rem;font-weight:700;margin-bottom:.5rem}
.step p{font-size:.9rem;color:var(--c-text-muted)}
@media(max-width:680px){.steps{grid-template-columns:1fr}}

/* ── Feature / Why-compare ────────────────────────────────────────────────── */
.why-compare{padding:clamp(2rem,5vw,4rem) 0;background:var(--c-surface)}
.why-compare h2{font-family:var(--font-head);font-size:clamp(1.4rem,3vw,2rem);font-weight:800;margin-bottom:2rem}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.feature-card{background:var(--c-bg);border:1px solid var(--c-border);border-radius:var(--r-md);padding:1.5rem}
.feature-card svg{width:2rem;height:2rem;color:var(--c-volt);margin-bottom:.8rem}
.feature-card h3{font-family:var(--font-head);font-size:1rem;font-weight:700;margin-bottom:.5rem}
.feature-card p{font-size:.9rem;color:var(--c-text-muted)}
@media(max-width:680px){.feature-grid{grid-template-columns:1fr}}

/* ── Prose ────────────────────────────────────────────────────────────────── */
.prose-section{padding:clamp(3rem,6vw,5rem) 0}
.prose-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem}
.prose h2{font-family:var(--font-head);font-size:clamp(1.2rem,2.5vw,1.6rem);font-weight:800;margin-bottom:1rem;color:var(--c-text)}
.prose h3{font-family:var(--font-head);font-size:1.05rem;font-weight:700;margin:1.5rem 0 .5rem}
.prose p{color:var(--c-text-muted);margin-bottom:1rem;line-height:1.7}
.prose p strong,.prose li strong{color:var(--c-text)}
.prose ul{list-style:disc;padding-left:1.5rem;margin-bottom:1rem}
.prose ul li{color:var(--c-text-muted);margin-bottom:.4rem}
.prose a{color:var(--c-link)}
.prose .lead{font-size:1.08rem;color:var(--c-text);border-left:3px solid var(--c-volt);padding-left:1rem;margin-bottom:1.5rem}
@media(max-width:860px){.prose-grid{grid-template-columns:1fr}}

/* ── Stadtteile ───────────────────────────────────────────────────────────── */
.stadtteile-overview,.stadtteile-full{padding:clamp(3rem,6vw,5rem) 0}
.stadtteile-overview h2,.stadtteile-full h2{font-family:var(--font-head);font-size:clamp(1.4rem,3vw,2rem);font-weight:800;margin-bottom:.5rem}
.chip-grid{display:flex;flex-wrap:wrap;gap:.75rem;margin-block:1.5rem 2rem}
.chip-grid--dense .chip{font-size:.82rem}
.chip{display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-md);padding:.6rem 1rem;color:var(--c-text);font-size:.88rem;font-weight:500;transition:.15s;text-decoration:none}
.chip:hover{border-color:var(--c-volt);color:var(--c-volt);text-decoration:none}
.chip small{font-size:.72rem;color:var(--c-text-muted);margin-top:.1rem}
.bezirk-title{font-family:var(--font-head);font-size:1.1rem;font-weight:700;color:var(--c-text-muted);margin-top:2rem;margin-bottom:.5rem;border-bottom:1px solid var(--c-border);padding-bottom:.5rem}

/* ── Sparrechner ──────────────────────────────────────────────────────────── */
.sparrechner{padding:clamp(3rem,6vw,5rem) 0;background:var(--c-surface)}
.sparrechner h2{font-family:var(--font-head);font-size:clamp(1.4rem,3vw,2rem);font-weight:800;margin-bottom:.5rem}
.geraete-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin-top:2rem}
.geraet-card{background:var(--c-bg);border:1px solid var(--c-border);border-radius:var(--r-md);padding:1.4rem}
.geraet-card h3{font-size:.95rem;font-weight:700;margin-bottom:.2rem}
.geraet-sub{font-size:.78rem;color:var(--c-text-muted);margin-bottom:1rem}
.geraet-slider{width:100%;accent-color:var(--c-volt);margin-bottom:.4rem;cursor:pointer}
.geraet-label{font-size:.8rem;color:var(--c-text-muted);margin-bottom.8rem}
.geraet-val{color:var(--c-volt);font-weight:700}
.geraet-result{display:flex;flex-direction:column;gap:.25rem;margin-top:.8rem;padding:.7rem;background:var(--c-surface);border-radius:var(--r-sm);font-size:.82rem;color:var(--c-text-muted)}
.geraet-result strong{color:var(--c-volt)}

/* ── Ratgeber ─────────────────────────────────────────────────────────────── */
.ratgeber-section{padding:clamp(3rem,6vw,5rem) 0}
.ratgeber-section h2{font-family:var(--font-head);font-size:clamp(1.4rem,3vw,2rem);font-weight:800;margin-bottom:2rem}
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.5rem;margin-bottom:2rem}
.article-card{display:flex;gap:1rem;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-md);padding:1.4rem;text-decoration:none;transition:.18s;color:var(--c-text)}
.article-card:hover{border-color:var(--c-volt);transform:translateY(-2px);box-shadow:var(--shadow-hover);text-decoration:none}
.article-card-icon{flex-shrink:0;width:2.5rem;height:2.5rem;color:var(--c-volt)}
.article-card-icon svg{width:100%;height:100%}
.article-card-body h2,.article-card-body h3{font-family:var(--font-head);font-size:1rem;font-weight:700;margin:.3rem 0 .4rem}
.article-card-body p{font-size:.85rem;color:var(--c-text-muted)}
.link-arrow{display:inline-flex;align-items:center;gap:.3rem;font-size:.83rem;color:var(--c-accent);margin-top:.6rem;font-weight:600}

/* ── Anbieter ─────────────────────────────────────────────────────────────── */
.anbieter-section{padding:clamp(3rem,6vw,5rem) 0}
.anbieter-section h2{font-family:var(--font-head);font-size:clamp(1.4rem,3vw,2rem);font-weight:800;margin-bottom:2rem}
.anbieter-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1.2rem;margin-bottom:2rem}
.anbieter-card{display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-md);padding:1.3rem;text-decoration:none;color:var(--c-text);transition:.18s}
.anbieter-card:hover{border-color:var(--c-volt);transform:translateY(-2px);box-shadow:var(--shadow-hover);text-decoration:none}
.anbieter-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.8rem}
.anbieter-card-header svg{width:1.8rem;height:1.8rem;color:var(--c-accent)}
.anbieter-card h2,.anbieter-card h3{font-family:var(--font-head);font-size:1rem;font-weight:700;margin-bottom:.3rem}
.anbieter-price{font-family:var(--font-mono);font-size:.9rem;color:var(--c-volt);margin-bottom:.5rem;font-weight:500}
.anbieter-desc{font-size:.82rem;color:var(--c-text-muted);flex-grow:1}

/* ── FAQ ──────────────────────────────────────────────────────────────────── */
.faq-section{padding:clamp(3rem,6vw,5rem) 0;background:var(--c-surface)}
.faq-section h2{font-family:var(--font-head);font-size:clamp(1.4rem,3vw,2rem);font-weight:800;margin-bottom:2rem}
.faq-list{display:flex;flex-direction:column;gap:.75rem;max-width:800px}
.faq-item{background:var(--c-bg);border:1px solid var(--c-border);border-radius:var(--r-md);overflow:hidden}
.faq-item summary{padding:1rem 1.2rem;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'▼';font-size:.7rem;color:var(--c-text-muted);transition:.2s}
.faq-item[open] summary::after{transform:rotate(180deg)}
.faq-item p{padding:.5rem 1.2rem 1rem;color:var(--c-text-muted);font-size:.9rem;line-height:1.65}

/* ── CTA Band ─────────────────────────────────────────────────────────────── */
.cta-band{padding:clamp(3rem,6vw,5rem) 0;text-align:center;background:radial-gradient(ellipse 70% 80% at 50% 50%,rgba(184,255,87,.06) 0%,transparent 70%)}
.cta-band h2{font-family:var(--font-head);font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;margin-bottom:1rem}
.cta-band p{color:var(--c-text-muted);max-width:55ch;margin-inline:auto;margin-bottom:2rem}

/* ── Aside Layout ─────────────────────────────────────────────────────────── */
.aside-layout{display:grid;grid-template-columns:1fr 320px;gap:2.5rem;padding-block:3rem;align-items:start}
.aside{display:flex;flex-direction:column;gap:1.5rem;position:sticky;top:80px}
.aside-card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-md);padding:1.4rem}
.aside-card h3{font-family:var(--font-head);font-size:1rem;font-weight:700;margin-bottom:.8rem}
.aside-card p{font-size:.88rem;color:var(--c-text-muted);margin-bottom:1rem}
.aside-list{display:flex;flex-direction:column;gap:.4rem;margin-bottom:1rem}
.aside-list li a{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;color:var(--c-text-muted);padding:.3rem 0;border-bottom:1px solid var(--c-border)}
.aside-list li a:hover{color:var(--c-volt);text-decoration:none}
.aside-price{color:var(--c-volt);font-family:var(--font-mono);font-size:.8rem}
@media(max-width:900px){.aside-layout{grid-template-columns:1fr}.aside{position:static}}

/* ── Price Box ────────────────────────────────────────────────────────────── */
.price-box{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-md);padding:1.2rem;margin-bottom:2rem}
.price-row{display:flex;justify-content:space-between;align-items:center;padding:.6rem 0;border-bottom:1px solid var(--c-border);font-size:.9rem}
.price-row:last-child{border-bottom:none}
.price-row span{color:var(--c-text-muted)}
.price-row strong{font-family:var(--font-mono);color:var(--c-text)}
.price-row.highlight strong{color:var(--c-volt);font-size:1.05rem}
.widget-wrap-section{margin-bottom:2rem}
.widget-wrap-section h2{font-family:var(--font-head);font-size:1.2rem;font-weight:700;margin-bottom:1rem}
.widget-wrap{border-radius:var(--r-md);overflow:hidden}

/* ── Subhero ──────────────────────────────────────────────────────────────── */
.subhero{display:flex;align-items:flex-start;gap:1rem;margin-top:.5rem}
.subhero-icon{width:3rem;height:3rem;color:var(--c-volt);flex-shrink:0}
.subhero-icon svg{width:100%;height:100%}
.subhero h1{font-family:var(--font-head);font-size:clamp(1.4rem,3vw,2rem);font-weight:800}

/* ── Breadcrumb ───────────────────────────────────────────────────────────── */
.breadcrumb{font-size:.82rem;color:var(--c-text-muted);margin-bottom:.75rem}
.breadcrumb a{color:var(--c-text-muted)}
.breadcrumb a:hover{color:var(--c-volt)}

/* ── Legal ────────────────────────────────────────────────────────────────── */
.legal-section{padding:3rem 0 5rem;max-width:800px}
.legal-section h1{font-family:var(--font-head);font-size:2rem;font-weight:800;margin-bottom:1.5rem}
.legal-section h2{font-family:var(--font-head);font-size:1.2rem;font-weight:700;margin:2rem 0 .5rem;color:var(--c-text)}
.legal-section p{color:var(--c-text-muted);margin-bottom:.75rem;font-size:.93rem}
.legal-section a{color:var(--c-link)}

/* ── Footer ───────────────────────────────────────────────────────────────── */
.footer-cta-band{background:var(--c-volt);padding:2rem 0;text-align:center}
.footer-cta-band .footer-cta-headline{font-family:var(--font-head);font-size:1.3rem;font-weight:800;color:#000;margin-bottom:1rem}
.footer-cta-band .btn-volt{background:#000;color:var(--c-volt)}
.site-footer{background:var(--c-surface);border-top:1px solid var(--c-border)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:3rem;padding-block:3rem}
.footer-brand p{font-size:.85rem;color:var(--c-text-muted);margin-top:1rem;max-width:30ch}
.footer-brand img{height:32px;width:auto;margin-bottom:.5rem}
.footer-nav-title{font-weight:700;font-size:.85rem;color:var(--c-text);margin-bottom:.8rem}
.footer-nav ul{display:flex;flex-direction:column;gap:.4rem}
.footer-nav ul li a{font-size:.82rem;color:var(--c-text-muted);transition:.15s}
.footer-nav ul li a:hover{color:var(--c-volt);text-decoration:none}
.footer-bottom{border-top:1px solid var(--c-border);padding-block:.75rem}
.footer-bottom p{font-size:.78rem;color:var(--c-text-muted);text-align:center}
@media(max-width:860px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:500px){.footer-grid{grid-template-columns:1fr}}

/* ── Cookie Banner ────────────────────────────────────────────────────────── */
.cookie-banner{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%);width:min(600px,calc(100vw - 2rem));background:var(--c-surface-2);border:1px solid var(--c-border);border-radius:var(--r-lg);padding:1.2rem 1.5rem;box-shadow:var(--shadow-hover);z-index:200}
.cookie-inner p{font-size:.85rem;color:var(--c-text-muted);margin-bottom:1rem}
.cookie-inner a{color:var(--c-link)}
.cookie-actions{display:flex;gap:.75rem;flex-wrap:wrap}

/* ── Error 404 ────────────────────────────────────────────────────────────── */
.error-section{padding:6rem 0;text-align:center}
.error-inner{max-width:500px;margin-inline:auto}
.error-inner svg{margin-inline:auto;margin-bottom:1.5rem}
.error-inner h1{font-family:var(--font-head);font-size:2rem;font-weight:800;margin-bottom:1rem}
.error-inner p{color:var(--c-text-muted);margin-bottom:2rem}
.error-links{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center}

/* ── Sparrechner index ────────────────────────────────────────────────────── */
.widget-section{padding:2rem 0}