/* =========================================================
   Copexam / Olaf Klau – Energieeffizienz-Beratung
   Zentrales Stylesheet (mobile-first, kein Framework)
   ========================================================= */

/* ---------------------------------------------------------
   Schriftart Jost – lokal eingebunden (Selbsthosting)
   Kein Abruf von fonts.googleapis.com / fonts.gstatic.com mehr,
   damit beim Seitenaufruf keine IP-Adressen an Google übertragen
   werden. Die Dateien liegen unter css/fonts/.
   Jost steht unter der SIL Open Font License 1.1; die Lizenzdatei
   (OFL.txt) gehört mit in den Ordner css/fonts/.
   Solange die Dateien fehlen, greift automatisch die
   Fallback-Schrift aus --font-base, die Seite bleibt nutzbar.
   --------------------------------------------------------- */
@font-face{
  font-family: 'Jost';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: local('Jost Medium'), local('Jost-Medium'),
       url('fonts/jost-500.woff2') format('woff2');
}
@font-face{
  font-family: 'Jost';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: local('Jost SemiBold'), local('Jost-SemiBold'),
       url('fonts/jost-600.woff2') format('woff2');
}
@font-face{
  font-family: 'Jost';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: local('Jost Bold'), local('Jost-Bold'),
       url('fonts/jost-700.woff2') format('woff2');
}
@font-face{
  font-family: 'Jost';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: local('Jost ExtraBold'), local('Jost-ExtraBold'),
       url('fonts/jost-800.woff2') format('woff2');
}

:root{
  --color-primary: #548235;      /* Copexam-Grün (aus Logo/Briefvorlage) */
  --color-primary-dark: #365422;
  --color-primary-light: #eaf0e6;
  --color-leaf: #a9d18e;         /* helles Logo-Grün, sparsam als Akzent */
  --color-accent: #4472c4;       /* Copexam-Blau (aus Logo/Briefvorlage) */
  --color-accent-dark: #355898;
  --color-text: #22281f;
  --color-text-muted: #57604f;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7f2;
  --color-border: #e0e4da;
  --max-width: 1140px;
  --radius: 8px;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Jost", var(--font-base);
}

*, *::before, *::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 17px;
}

img{ max-width: 100%; height: auto; display: block; }

a{ color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }
a:hover{ color: var(--color-accent-dark); }

h1, h2, h3, h4{
  font-family: var(--font-display);
  line-height: 1.25;
  color: var(--color-primary-dark);
  margin: 0 0 .6em;
}
h1{ font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; }
h2{ font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 700; }
h3{ font-size: 1.2rem; font-weight: 600; }
p{ margin: 0 0 1em; }

.container{
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.visually-hidden{
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Skip link for accessibility */
.skip-link{
  position: absolute; left: -999px; top: 0;
  background: var(--color-primary); color: #fff;
  padding: 10px 16px; z-index: 1000; border-radius: 0 0 6px 0;
}
.skip-link:focus{ left: 0; }

/* ---------- Header / Navigation ---------- */
.site-header{
  border-bottom: 1px solid var(--color-border);
  background: #fff;
  position: sticky; top: 0; z-index: 100;
}
.site-header .container{
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px; gap: 20px;
}
.logo{
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.3rem; color: var(--color-primary-dark);
  text-decoration: none;
}
.logo img.logo-mark{
  width: 40px; height: 40px; flex-shrink: 0; object-fit: contain;
}
.logo .logo-mark{
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--color-primary);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 800; flex-shrink: 0;
}
.logo img.logo-wordmark{
  height: 30px; width: auto; flex-shrink: 0;
}
.logo .logo-sub{
  display: block; font-size: .68rem; font-weight: 500; color: var(--color-text-muted);
  letter-spacing: .02em;
}

.nav-toggle{
  display: inline-flex; align-items: center; justify-content: center;
  background: none; border: 1px solid var(--color-border); border-radius: 6px;
  width: 42px; height: 42px; cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width: 20px; height: 2px; background: var(--color-primary-dark);
  position: relative; transition: .2s;
}
.nav-toggle span::before{ position:absolute; top:-6px; }
.nav-toggle span::after{ position:absolute; top:6px; }

.main-nav{
  display: none;
  width: 100%;
}
.main-nav.open{ display: block; }
.main-nav ul{
  list-style: none; margin: 14px 0 0; padding: 0;
  display: flex; flex-direction: column; gap: 2px;
}
.main-nav a{
  display: block; padding: 10px 4px; text-decoration: none;
  color: var(--color-text); font-weight: 600; border-bottom: 1px solid var(--color-border);
}
.main-nav a[aria-current="page"]{ color: var(--color-primary); }
.main-nav .nav-cta{
  margin-top: 10px;
  display: inline-block; background: var(--color-accent); color: #fff !important;
  padding: 10px 18px; border-radius: var(--radius); text-align: center; border-bottom: none;
}

@media (min-width: 880px){
  .nav-toggle{ display: none; }
  .main-nav{ display: block; width: auto; }
  .main-nav ul{ flex-direction: row; align-items: center; gap: 18px; flex-wrap: nowrap; }
  .main-nav a{ padding: 6px 0; border-bottom: none; white-space: nowrap; font-size: .96rem; }
  .main-nav a[aria-current="page"]{ box-shadow: inset 0 -2px 0 var(--color-primary); }
  .main-nav .nav-cta{ margin-top: 0; padding: 10px 18px; white-space: nowrap; }
}
@media (min-width: 880px) and (max-width: 1180px){
  .logo .logo-sub{ display: none; }
  .logo img.logo-wordmark{ height: 24px; }
  .main-nav ul{ gap: 13px; }
  .main-nav a{ font-size: .87rem; }
  .main-nav .nav-cta{ padding: 9px 14px; }
}

/* ---------- Buttons ---------- */
.btn{
  display: inline-block;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 1rem;
}
.btn-primary{ background: var(--color-accent); color: #fff; }
.btn-primary:hover{ background: var(--color-accent-dark); color:#fff; }
.btn-outline{ background: transparent; border-color: #fff; color: #fff; }
.btn-outline:hover{ background: rgba(255,255,255,.12); color: #fff; }
.btn-secondary{ background: var(--color-primary); color: #fff; }
.btn-secondary:hover{ background: var(--color-primary-dark); color: #fff; }

/* ---------- Hero ---------- */
.hero{
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: 52px 0 60px;
}
.hero .eyebrow{
  text-transform: uppercase; letter-spacing: .08em; font-size: .8rem;
  font-weight: 700; color: #cfe4e0; margin-bottom: 14px;
}
.hero h1{ color: #fff; max-width: 18ch; }
.hero p.lead{ font-size: 1.15rem; color: #e7f0ee; max-width: 55ch; }

.hero-top{
  display: grid; gap: 30px; align-items: center;
}
@media (min-width: 780px){
  .hero-top{ grid-template-columns: 1.15fr .85fr; gap: 42px; }
  .hero h1, .hero p.lead{ max-width: none; }
}
.hero-image img{
  width: 100%; height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.3);
  box-shadow: 0 16px 34px rgba(0,0,0,.28);
}

.hero-split{
  display: grid; gap: 16px; margin-top: 34px;
}
@media (min-width: 720px){
  .hero-split{ grid-template-columns: 1fr 1fr; gap: 20px; }
}
.hero-card{
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: var(--radius);
  padding: 22px;
}
.hero-card h2{ color: #fff; font-size: 1.25rem; }
.hero-card p{ color: #e7f0ee; font-size: .96rem; }
.hero-card a{ color: #fff; font-weight: 700; }

/* ---------- Sections ---------- */
.section{ padding: 56px 0; }
.section-alt{ background: var(--color-bg-alt); }
.section-header{ max-width: 62ch; margin-bottom: 34px; }
.section-header .kicker{
  text-transform: uppercase; letter-spacing: .08em; font-size: .78rem;
  font-weight: 700; color: var(--color-accent-dark);
}

/* ---------- Card grid ---------- */
.grid{ display: grid; gap: 22px; }
@media (min-width: 640px){ .grid-2{ grid-template-columns: 1fr 1fr; } }
@media (min-width: 880px){ .grid-3{ grid-template-columns: repeat(3, 1fr); } }

.card{
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 26px; height: 100%;
}
.card .icon{
  width: 46px; height: 46px; border-radius: 10px;
  background: var(--color-primary-light); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 14px;
}
.card a.card-link{ font-weight: 700; text-decoration: none; }
.card a.card-link::after{ content: " →"; }

/* ---------- Trust bar ---------- */
.trust-bar{
  background: var(--color-primary-dark); color: #fff; padding: 22px 0;
}
.trust-bar .container{
  display: flex; flex-wrap: wrap; gap: 18px 34px; align-items: center; justify-content: center;
  text-align: center; font-size: .92rem; font-weight: 600; color: #e7f0ee;
}
.trust-bar .trust-item{ display:flex; align-items:center; gap:10px; }
.trust-bar .trust-item a{ color:inherit; text-decoration:underline; text-decoration-color:rgba(255,255,255,.45); text-underline-offset:2px; }
.trust-bar .trust-item a:hover{ text-decoration-color:#fff; }
.trust-bar .trust-badge{
  width: 34px; height: 34px; border-radius: 50%; background: rgba(255,255,255,.12);
  display:flex; align-items:center; justify-content:center; font-size:.85rem; font-weight:800;
  flex-shrink:0;
}
.trust-bar .trust-badge-img{
  height: 34px; padding: 5px 10px; border-radius: 8px; background:#fff;
  display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.trust-bar .trust-badge-img img{ height:100%; width:auto; display:block; }

/* ---------- Card logos (Qualifikationen) ---------- */
.card .card-logo{ height: 34px; width:auto; margin-bottom: 14px; display:block; }

/* ---------- External links bar ---------- */
.external-links-bar{
  background: var(--color-bg-alt); border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
}
.external-links-bar .container{
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 22px;
  font-size: .88rem;
}
.external-links-label{ font-weight: 700; color: var(--color-text-muted); }
.external-links-list{
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 6px 22px;
}
.external-links-list a{ font-weight: 600; }

/* ---------- Quote / testimonial ---------- */
.quote{
  border-left: 4px solid var(--color-accent);
  padding: 4px 0 4px 20px; font-size: 1.1rem; font-style: italic; color: var(--color-text);
}
.quote cite{ display:block; margin-top: 10px; font-style: normal; font-size:.9rem; color: var(--color-text-muted); }

/* ---------- CTA band ---------- */
.cta-band{
  background: var(--color-primary); color: #fff; padding: 46px 0; text-align: center;
}
.cta-band h2{ color: #fff; }
.cta-band p{ color: #e7f0ee; max-width: 55ch; margin-left:auto; margin-right:auto; }

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  font-size: .85rem; color: var(--color-text-muted); margin-bottom: 18px;
}
.breadcrumb a{ color: var(--color-text-muted); }

/* ---------- Page header (Unterseiten) ---------- */
.page-header{
  background: var(--color-bg-alt); padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
}
.page-header h1{ margin-bottom: 8px; }
.page-header .lead{ color: var(--color-text-muted); max-width: 60ch; }

/* ---------- Tables ---------- */
table{ width:100%; border-collapse: collapse; margin: 1em 0; }
th, td{ text-align:left; padding: 10px 12px; border-bottom: 1px solid var(--color-border); }
th{ color: var(--color-primary-dark); }

/* ---------- Forms ---------- */
label{ display:block; font-weight:600; margin-bottom: 6px; }
input, textarea, select{
  width: 100%; padding: 11px 12px; border: 1px solid var(--color-border); border-radius: 6px;
  font-family: inherit; font-size: 1rem; margin-bottom: 18px;
}
input:focus, textarea:focus, select:focus{ outline: 2px solid var(--color-primary); outline-offset: 1px; }
fieldset{ border: 1px solid var(--color-border); border-radius: var(--radius); padding: 18px; margin-bottom: 18px; }
legend{ font-weight: 700; padding: 0 8px; }
.form-note{ font-size: .85rem; color: var(--color-text-muted); }
.checklist-option{ display:flex; align-items:flex-start; gap:10px; margin-bottom:10px; font-weight:400; }
.checklist-option input{ width:auto; margin: 4px 0 0; }

/* ---------- Rechner-Ergebnis ---------- */
#foerder-ergebnis{
  margin-top: 24px; padding: 20px; border-radius: var(--radius);
  background: var(--color-primary-light); border: 1px solid var(--color-primary);
  display:none;
}
#foerder-ergebnis.visible{ display:block; }

/* ---------- Footer ---------- */
.site-footer{
  background: var(--color-primary-dark); color: #cfe4e0; padding: 46px 0 24px; margin-top: 60px;
}
.site-footer a{ color: #fff; }
.footer-grid{
  display: grid; gap: 30px; margin-bottom: 30px;
}
@media (min-width: 720px){ .footer-grid{ grid-template-columns: 2fr 1fr 1fr; } }
.footer-logo{ height: 30px; width: auto; margin-bottom: 12px; }
.brand-logo{ width: 100%; max-width: 320px; height: auto; margin: 0 auto; }
.site-footer h3{ color: #fff; font-size: 1rem; }
.site-footer ul{ list-style:none; padding:0; margin:0; }
.site-footer li{ margin-bottom: 8px; }
.footer-bottom{
  border-top: 1px solid rgba(255,255,255,.15); padding-top: 20px;
  display:flex; flex-wrap:wrap; gap:10px 20px; justify-content:space-between; align-items:center;
  font-size: .85rem;
}
.footer-bottom ul{ display:flex; flex-wrap:wrap; gap: 6px 16px; }
.footer-bottom li{ margin:0; }

/* ---------- Utilities ---------- */
.text-center{ text-align:center; }
.mt-0{ margin-top:0; }
.stand-hinweis{
  font-size: .82rem; color: var(--color-text-muted); background: var(--color-bg-alt);
  border: 1px dashed var(--color-border); padding: 10px 14px; border-radius: 6px; margin: 18px 0;
}
.placeholder-note{
  font-size:.82rem; color:#8a4b00; background:#fff6e8; border:1px dashed var(--color-accent);
  padding:10px 14px; border-radius:6px; margin:14px 0;
}
figure{ margin: 0 0 1.2em; }
figcaption{ font-size:.82rem; color: var(--color-text-muted); margin-top:6px; }
figure img, .card img{
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  object-fit: cover;
  width: 100%;
}
.gallery-grid figure img{
  aspect-ratio: 4 / 3;
  height: auto;
}