/* Rheinkonkret – Public Website */
:root {
    --gruen: #173F2E;
    --gruen-hell: #2F7A52;
    --gruen-blass: #E8F0EB;
    --tinte: #1E2521;
    --grau: #5C6660;
    --linie: #DFE6E2;
    --flaeche: #F7F9F8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; color: var(--tinte); line-height: 1.6; background: #fff; }
a { color: var(--gruen-hell); text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.wrap-schmal { max-width: 780px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--linie); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--tinte); font-weight: 700; }
.logo-mark { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; background: var(--gruen); color: #fff; font-size: 22px; font-weight: 800; }
.logo-text { line-height: 1.15; font-size: 18px; }
.logo-text small { display: block; font-weight: 500; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--gruen-hell); }
.logo-hell, .logo-hell .logo-text { color: #fff; }
.mainnav { display: flex; align-items: center; gap: 22px; }
.mainnav > a, .dropdown > a { color: var(--tinte); font-weight: 600; font-size: 15px; padding: 6px 2px; }
.mainnav > a.aktiv { color: var(--gruen-hell); }
.mainnav > a:hover { color: var(--gruen-hell); }
.btn-login { background: var(--gruen); color: #fff !important; padding: 9px 18px; border-radius: 8px; }
.btn-login:hover { background: var(--gruen-hell); }
.burger { display: none; font-size: 24px; background: none; border: 0; cursor: pointer; }

.dropdown { position: relative; }
.dropdown-menu { position: absolute; top: 100%; left: 0; background: #fff; border: 1px solid var(--linie); border-radius: 10px; box-shadow: 0 14px 34px rgba(23,63,46,.12); padding: 8px; min-width: 240px; display: none; }
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a { display: block; padding: 9px 12px; border-radius: 7px; color: var(--tinte); font-weight: 500; }
.dropdown-menu a:hover { background: var(--gruen-blass); color: var(--gruen); }

/* Hero */
.hero { background: linear-gradient(140deg, var(--gruen) 0%, #0F2B1F 100%); color: #fff; padding: 90px 0 80px; }
.hero-sub { padding: 60px 0 48px; }
.hero h1 { font-size: clamp(30px, 4.6vw, 52px); line-height: 1.12; margin: 10px 0 18px; letter-spacing: -0.015em; }
.eyebrow { color: #A7D4BC; text-transform: uppercase; letter-spacing: .16em; font-size: 12px; font-weight: 700; margin: 0; }
.sub { font-size: 19px; color: #D9E7DF; max-width: 640px; margin: 0; }
.hero-cta { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }

/* Buttons */
.btn { display: inline-block; padding: 13px 26px; border-radius: 9px; font-weight: 700; font-size: 15px; border: 0; cursor: pointer; }
.btn-primary { background: var(--gruen-hell); color: #fff; }
.btn-primary:hover { background: #256641; }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.35); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }

/* Sections */
.section { padding: 74px 0; }
.section-alt { background: var(--flaeche); }
.section-title { font-size: clamp(24px, 3.2vw, 36px); margin: 0 0 10px; letter-spacing: -0.01em; color: var(--gruen); }
.section-sub { color: var(--grau); max-width: 680px; margin: 0 0 40px; font-size: 17px; }
.intro { font-size: 18px; color: var(--grau); }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.card { background: #fff; border: 1px solid var(--linie); border-radius: 14px; padding: 28px; color: var(--tinte); display: flex; flex-direction: column; gap: 8px; transition: box-shadow .18s, transform .18s; }
.card:hover { box-shadow: 0 18px 40px rgba(23,63,46,.13); transform: translateY(-3px); }
.card-icon { width: 48px; height: 48px; display: grid; place-items: center; background: var(--gruen-blass); color: var(--gruen); font-size: 22px; border-radius: 12px; }
.card h3 { margin: 6px 0 0; font-size: 20px; color: var(--gruen); }
.card-claim { font-weight: 600; margin: 0; }
.card p { margin: 0; color: var(--grau); font-size: 15px; }
.card-more { margin-top: auto; padding-top: 10px; color: var(--gruen-hell); font-weight: 700; font-size: 14px; }

.grid-klein { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; }
.mini { background: #fff; border: 1px solid var(--linie); border-left: 4px solid var(--gruen-hell); border-radius: 10px; padding: 18px 20px; color: var(--tinte); }
.mini:hover { border-left-color: var(--gruen); background: var(--gruen-blass); }
.mini strong { color: var(--gruen); }
.mini p { margin: 6px 0 0; font-size: 14px; color: var(--grau); }

/* 3 Schritte */
.steps3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 26px; margin-top: 34px; }
.step { text-align: center; padding: 0 8px; }
.step-nr { display: inline-grid; place-items: center; width: 54px; height: 54px; border-radius: 50%; background: var(--gruen); color: #fff; font-size: 24px; font-weight: 800; margin-bottom: 12px; }
.step h3 { margin: 4px 0 8px; color: var(--gruen); }
.step p { color: var(--grau); font-size: 15px; margin: 0; }
.cta-mitte { text-align: center; margin-top: 40px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.steps-wrap .section-title { text-align: center; }

/* Checkliste Leistungen */
.checkliste { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 10px; }
.checkliste li { background: var(--flaeche); border: 1px solid var(--linie); border-radius: 9px; padding: 12px 16px 12px 42px; position: relative; font-weight: 500; }
.checkliste li::before { content: '✓'; position: absolute; left: 15px; color: var(--gruen-hell); font-weight: 800; }

/* Kontakt */
.kontakt-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; }
.kontakt-info { background: var(--gruen-blass); border-radius: 12px; padding: 22px 26px; font-size: 16px; }
.kontakt-form label { display: block; font-weight: 600; margin: 14px 0 5px; font-size: 14px; }
.kontakt-form input, .kontakt-form select, .kontakt-form textarea { width: 100%; padding: 11px 13px; border: 1px solid #C6D2CB; border-radius: 8px; font-size: 15px; font-family: inherit; }
.kontakt-form input:focus, .kontakt-form textarea:focus, .kontakt-form select:focus { outline: 2px solid var(--gruen-hell); border-color: var(--gruen-hell); }
.kontakt-form button { margin-top: 18px; }

.flash { padding: 13px 16px; border-radius: 9px; margin: 14px 0; font-weight: 500; }
.flash-success { background: #E4F3EA; color: #1C5E3B; border: 1px solid #BCE0CB; }

/* Footer */
.site-footer { background: var(--gruen); color: #CFE0D7; margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 34px; padding: 54px 20px 30px; }
.site-footer h4 { color: #fff; margin: 0 0 10px; font-size: 15px; letter-spacing: .04em; }
.site-footer a { color: #A7D4BC; }
.site-footer a:hover { color: #fff; }
.footer-unten { border-top: 1px solid rgba(255,255,255,.14); padding: 18px 20px; font-size: 13px; }

/* Mobil */
@media (max-width: 860px) {
    .burger { display: block; }
    .mainnav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch; gap: 0; padding: 10px 16px 18px; border-bottom: 1px solid var(--linie); box-shadow: 0 18px 30px rgba(0,0,0,.08); }
    body.nav-open .mainnav { display: flex; }
    .mainnav > a, .dropdown > a { padding: 12px 4px; border-bottom: 1px solid var(--flaeche); }
    .dropdown-menu { position: static; display: block; border: 0; box-shadow: none; padding: 0 0 6px 14px; }
    .btn-login { text-align: center; margin-top: 10px; }
    .kontakt-grid { grid-template-columns: 1fr; gap: 30px; }
    .hero { padding: 60px 0 54px; }
    .section { padding: 52px 0; }
}