/* Op de Hipt Stahlbau GmbH — Website
   Ein Stylesheet, keine Frameworks, keine Web-Fonts (Systemschrift = schnell, auch bei schwachem Mobilfunk). */

/* ===== Design-Tokens ===== */
:root{
  --navy: #184982;
  --navy-dark: #0f3560;
  --navy-tint: #e9eef4;
  --orange: #f39200;
  --orange-dark: #cf7c00;
  --ink: #21201d;
  --ink-soft: #514f49;
  --paper: #ffffff;
  --sand: #f6f3ee;
  --line: #ddd7cb;
  --success: #2e6b2f;
  --success-bg: #eaf4ea;
  --error: #a4291f;
  --error-bg: #fbebe9;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(15,53,96,0.12);
  --maxw: 1120px;
  --header-h: 92px;
  --mobile-cta-h: 62px;
  font-size: 17px;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  padding-bottom: var(--mobile-cta-h);
}
@media (min-width: 861px){ body{ padding-bottom: 0; } }

img{ max-width:100%; display:block; }
a{ color: var(--navy); text-decoration-thickness: 1.5px; }
a:hover{ color: var(--orange-dark); }
h1,h2,h3,h4{ line-height:1.2; font-weight:800; color: var(--navy-dark); margin: 0 0 .5em; }
h1{ font-size: clamp(1.75rem, 4vw, 2.6rem); }
h2{ font-size: clamp(1.4rem, 3vw, 1.9rem); padding-top:.4em; position:relative; }
h2::before{ content:""; position:absolute; top:0; left:0; width:52px; height:4px; background: var(--orange); border-radius:2px; }
h2.center::before, .center h2::before{ left:50%; transform:translateX(-50%); }
.section-navy h2::before{ background:#fff; }
h3{ font-size: 1.2rem; }
p{ margin: 0 0 1em; }
ul,ol{ padding-left: 1.25em; }
.container{ max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
section{ padding: 56px 0; }
.section-tight{ padding: 32px 0; }
.section-sand{ background: var(--sand); }
.section-navy{ background: var(--navy); color:#fff; }
.section-navy h1, .section-navy h2, .section-navy h3, .section-navy h4{ color:#fff; }
.section-navy .lede{ color:#dfe9f5; }
.section-navy a:not(.btn){ color:#fff; text-decoration-color:#9fc3e6; }
.section-navy a:not(.btn):hover{ color:#ffd9a3; }
.center{ text-align:center; }
.lede{ font-size: 1.15rem; color: var(--ink-soft); max-width: 62ch; }
.center .lede{ margin-left:auto; margin-right:auto; }
.visually-hidden{ position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; }
.skip-link{ position:absolute; left:-999px; top:0; background:var(--navy); color:#fff; padding:10px 16px; z-index:200; }
.skip-link:focus{ left:8px; top:8px; }

/* ===== Buttons ===== */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.5em;
  padding: 14px 26px; border-radius: var(--radius); border: 2px solid transparent;
  font-weight:700; font-size:1rem; cursor:pointer; text-decoration:none; line-height:1.1;
  min-height:48px; transition: background-color .15s, color .15s, border-color .15s;
}
.btn-primary{ background: var(--orange); color:#241300; }
.btn-primary:hover{ background: var(--orange-dark); color:#241300; }
.btn-outline{ background:transparent; border-color: currentColor; color: var(--navy); }
.btn-outline:hover{ background: var(--navy); color:#fff; border-color: var(--navy); }
.btn-outline-light{ background:transparent; border-color:#fff; color:#fff; }
.btn-outline-light:hover{ background:#fff; color: var(--navy); }
.btn-block{ width:100%; }
.btn-lg{ padding: 16px 32px; font-size:1.1rem; }

/* ===== Kopfzeile & Navigation ===== */
.site-header{
  position: sticky; top:0; z-index:100; background:#fff; border-bottom:3px solid var(--orange);
  box-shadow: var(--shadow);
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between; gap:16px; min-height: var(--header-h);
}
.brand{ display:flex; align-items:center; text-decoration:none; flex-shrink:0; }
.brand-logo{ height:56px; width:auto; display:block; }
@media (min-width:640px){ .brand-logo{ height:72px; } }

.main-nav{ display:none; }
.main-nav ul{ display:flex; align-items:center; gap:6px; list-style:none; margin:0; padding:0; }
.main-nav a{
  display:block; padding: 10px 12px; color: var(--ink); font-weight:600; text-decoration:none; border-radius: var(--radius);
  font-size: .98rem; border-bottom: 3px solid transparent;
}
.main-nav a:hover{ background: var(--navy-tint); color: var(--navy-dark); }
.main-nav a.active{ color: var(--navy-dark); border-bottom-color: var(--orange); }
.header-cta{ display:none; }
.header-actions{ display:flex; align-items:center; gap:10px; }
.nav-toggle{
  display:inline-flex; align-items:center; justify-content:center; width:46px; height:46px;
  border:2px solid var(--navy); border-radius: var(--radius); background:#fff; cursor:pointer; padding:0;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width:20px; height:2px; background:var(--navy); position:relative; transition:.15s;
}
.nav-toggle span::before{ position:absolute; top:-7px; }
.nav-toggle span::after{ position:absolute; top:7px; }

.mobile-nav{ display:none; background:#fff; border-top:1px solid var(--line); }
.mobile-nav.is-open{ display:block; }
.mobile-nav ul{ list-style:none; margin:0; padding: 8px 0; }
.mobile-nav a{ display:block; padding:14px 20px; color:var(--ink); font-weight:600; text-decoration:none; border-bottom:1px solid var(--line); }
.mobile-nav a.active{ color: var(--navy-dark); background: var(--navy-tint); }
.mobile-nav .header-cta{ display:block; margin:14px 20px; }

@media (min-width: 861px){
  .main-nav{ display:block; }
  .header-cta{ display:inline-flex; }
  .nav-toggle{ display:none; }
  .mobile-nav{ display:none !important; }
}

/* Mobile: fixierter CTA-Button am unteren Bildschirmrand */
.mobile-cta-bar{
  position: fixed; left:0; right:0; bottom:0; z-index:100;
  background:#fff; border-top:2px solid var(--orange); padding:8px 12px; box-shadow: 0 -2px 10px rgba(0,0,0,.12);
}
.mobile-cta-bar .btn{ width:100%; }
@media (min-width: 861px){ .mobile-cta-bar{ display:none; } }

/* ===== Hero ===== */
.hero{ background: var(--navy); color:#fff; padding: 48px 0; position:relative; overflow:hidden; }
.hero::after{
  content:""; position:absolute; right:-10%; bottom:-40%; width:60%; height:160%;
  background: repeating-linear-gradient(115deg, rgba(255,255,255,.05) 0 18px, rgba(255,255,255,0) 18px 36px);
  pointer-events:none;
}
.hero-grid{ display:grid; gap:32px; position:relative; }
.hero h1{ color:#fff; }
.hero .lede{ color:#dfe9f3; max-width:56ch; }
.hero-actions{ display:flex; flex-wrap:wrap; gap:12px; margin-top:22px; }
.hero-facts{ list-style:none; margin: 28px 0 0; padding:0; display:grid; grid-template-columns: repeat(2,1fr); gap:16px; }
@media (min-width:640px){ .hero-facts{ grid-template-columns: repeat(4,1fr); } }
.hero-facts li{ background: rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.18); border-radius: var(--radius); padding:14px; }
.hero-facts strong{ display:block; font-size:1.5rem; color:#fff; }
.hero-facts span{ font-size:.85rem; color:#cfdcea; }
@media (min-width: 861px){ .hero-grid{ grid-template-columns: 1.1fr .9fr; align-items:center; } }

/* ===== Karten / Grids ===== */
.grid{ display:grid; gap:24px; }
.grid-2{ grid-template-columns: 1fr; }
.grid-3{ grid-template-columns: 1fr; }
.grid-4{ grid-template-columns: 1fr; }
@media (min-width: 640px){ .grid-2{ grid-template-columns: 1fr 1fr; } .grid-4{ grid-template-columns: 1fr 1fr; } }
@media (min-width: 861px){ .grid-3{ grid-template-columns: repeat(3,1fr); } .grid-4{ grid-template-columns: repeat(4,1fr); } }

.card{ background:#fff; border-radius: var(--radius); padding:24px; box-shadow: var(--shadow); }
.card h3{ margin-top:0; }
.card-link{ display:block; text-decoration:none; color:inherit; height:100%; }
.card-link:hover{ transform: translateY(-3px); transition: transform .15s; }
.card-link .card{ height:100%; }
.tag{ display:inline-block; font-size:.75rem; font-weight:700; text-transform:uppercase; letter-spacing:.04em; color: var(--orange-dark); background: #fdecd2; padding:4px 10px; border-radius:999px; margin-bottom:10px; }
.tag-navy{ color: var(--navy-dark); background: var(--navy-tint); }

/* Bild-Platzhalter — bewusst als solcher erkennbar, kein Fake-Stockfoto */
.img-placeholder{
  aspect-ratio: 4/3; border-radius: var(--radius); border:1px dashed #9fb3c8;
  background: repeating-linear-gradient(135deg, #eef2f6 0 14px, #e3e9f0 14px 28px);
  display:flex; align-items:center; justify-content:center; text-align:center; padding:16px;
  color: var(--ink-soft); font-size:.85rem;
}
.img-placeholder strong{ display:block; color: var(--navy-dark); font-size:.95rem; margin-bottom:4px; }
.img-placeholder.wide{ aspect-ratio: 16/9; }
.ref-photo{ width:100%; aspect-ratio: 4/3; object-fit:cover; border-radius: var(--radius); }

/* ===== Trust-Leiste ===== */
.trust-bar{ display:grid; gap:20px; grid-template-columns: 1fr; text-align:center; }
@media (min-width:640px){ .trust-bar{ grid-template-columns: repeat(3,1fr); } }
.trust-bar .num{ font-size:2.1rem; font-weight:800; color: var(--navy-dark); display:block; }
.trust-bar .lbl{ color: var(--ink-soft); }

.pro-con{ display:grid; gap:16px; margin: 12px 0 28px; grid-template-columns: 1fr; }
@media (min-width:640px){ .pro-con{ grid-template-columns: 1fr 1fr; } }
.pro-con > div{ padding:16px 18px; border-radius: var(--radius); }
.pro-con .pro{ background: var(--success-bg); }
.pro-con .con{ background: var(--error-bg); }
.pro-con h4{ margin:0 0 8px; font-size:.95rem; text-transform:uppercase; letter-spacing:.03em; }
.pro-con .pro h4{ color: var(--success); }
.pro-con .con h4{ color: var(--error); }
.pro-con ul{ margin:0; padding-left:1.1em; }

.note-check{
  border-left:3px solid var(--orange);
  padding:2px 0 2px 16px; font-size:.92rem; color: var(--ink-soft); margin: 0 0 28px;
}
.note-check strong{ color: var(--navy-dark); }

.breadcrumb{ font-size:.85rem; color: var(--ink-soft); margin-bottom:18px; }
.breadcrumb a{ color: var(--ink-soft); }

/* ===== Sprungmarken-Pillen (Wissen) ===== */
.pill-nav{ display:flex; flex-wrap:wrap; gap:10px; margin: 24px 0 8px; }
.pill-nav a{
  display:inline-block; padding:10px 20px; border-radius:999px; background: var(--navy-tint);
  color: var(--navy-dark); font-weight:700; font-size:.92rem; text-decoration:none;
}
.pill-nav a:hover{ background: var(--navy); color:#fff; }

/* ===== Icon-Reihen mit kleinen Diagrammen (Wissen) ===== */
.icon-grid{ display:grid; gap:28px; grid-template-columns: repeat(2,1fr); margin: 24px 0 32px; }
@media (min-width:640px){ .icon-grid{ grid-template-columns: repeat(4,1fr); } }
.icon-grid figure{ margin:0; text-align:center; }
.icon-grid svg{ width:100%; height:auto; max-width:120px; }
.icon-grid figcaption{ margin-top:12px; }
.icon-grid figcaption strong{ display:block; color:var(--navy-dark); font-size:1rem; margin-bottom:4px; }
.icon-grid figcaption span{ font-size:.88rem; color:var(--ink-soft); }

.split-diagram{ display:grid; gap:24px; grid-template-columns:1fr; margin:24px 0 32px; align-items:start; }
@media (min-width:640px){ .split-diagram{ grid-template-columns:1fr 1fr; } }
.split-diagram figure{ margin:0; text-align:center; background: var(--sand); border-radius: var(--radius); padding:24px 16px; }
.split-diagram svg{ width:100%; max-width:220px; height:auto; }
.split-diagram figcaption{ margin-top:14px; }
.split-diagram figcaption strong{ display:block; color:var(--navy-dark); font-size:1.05rem; margin-bottom:4px; }
.split-diagram figcaption span{ font-size:.9rem; color:var(--ink-soft); }

/* ===== Kompakte Hallentypen-Liste (Wissen) ===== */
.fact-list{ display:grid; gap:0; grid-template-columns:1fr; margin: 24px 0 32px; border-top:1px solid var(--line); }
@media (min-width:781px){ .fact-list{ grid-template-columns: 1fr 1fr; } }
.fact-list > div{ padding:18px 4px; border-bottom:1px solid var(--line); }
@media (min-width:781px){ .fact-list > div:nth-child(odd){ border-right:1px solid var(--line); padding-right:24px; } .fact-list > div:nth-child(even){ padding-left:24px; } }
.fact-list dt{ font-weight:800; color:var(--navy-dark); font-size:1.05rem; margin-bottom:4px; }
.fact-list dt span{ font-weight:600; font-size:.72rem; text-transform:uppercase; letter-spacing:.04em; color:var(--orange-dark); display:block; margin-bottom:2px; }
.fact-list dd{ margin:0; color:var(--ink-soft); font-size:.95rem; }

/* ===== Referenzen / Filter-Galerie ===== */
.filter-bar{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom:28px; }
.filter-btn{
  border:2px solid var(--line); background:#fff; padding:9px 16px; border-radius:999px; font-weight:600;
  font-size:.9rem; cursor:pointer; color: var(--ink);
}
.filter-btn:hover{ border-color: var(--navy); }
.filter-btn.is-active{ background: var(--navy); border-color: var(--navy); color:#fff; }
.ref-card .meta{ display:flex; flex-wrap:wrap; gap:8px; margin: 10px 0; }
.ref-card .meta span{ font-size:.78rem; font-weight:700; background: var(--navy-tint); color:var(--navy-dark); padding:3px 9px; border-radius:999px; }
.ref-empty{ display:none; text-align:center; padding:40px 20px; color:var(--ink-soft); }

/* ===== Formulare ===== */
.form-tabs{ display:flex; gap:8px; margin-bottom:28px; border-bottom:2px solid var(--line); flex-wrap:wrap; }
.form-tab{
  background:transparent; border:none; border-bottom:3px solid transparent; padding:14px 8px; margin-bottom:-2px;
  font-weight:700; font-size:1rem; color: var(--ink-soft); cursor:pointer;
}
.form-tab.is-active{ color: var(--navy-dark); border-color: var(--orange); }
.form-panel{ display:none; }
.form-panel.is-active{ display:block; }

.field{ margin-bottom:20px; }
.field label{ display:block; font-weight:700; margin-bottom:6px; font-size:.95rem; }
.field .hint{ display:block; font-weight:400; color: var(--ink-soft); font-size:.82rem; margin-top:4px; }
.field input[type=text], .field input[type=email], .field input[type=tel], .field input[type=number], .field select, .field textarea{
  width:100%; padding:13px 14px; border:2px solid var(--line); border-radius: var(--radius); font-size:1rem; font-family:inherit;
  background:#fff; color:var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus{ outline:3px solid #b9d3ea; border-color: var(--navy); }
.field-row{ display:grid; gap:16px; grid-template-columns:1fr; }
@media (min-width:640px){ .field-row{ grid-template-columns: repeat(var(--cols,2), 1fr); } }
.radio-group{ display:flex; flex-wrap:wrap; gap:10px 22px; }
.radio-group label{ font-weight:600; display:flex; align-items:center; gap:8px; }
.radio-group input{ width:18px; height:18px; }
.required::after{ content:" *"; color: var(--error); }
.field.is-error input, .field.is-error select, .field.is-error textarea{ border-color: var(--error); }
.field .error-msg{ display:none; color: var(--error); font-size:.85rem; margin-top:6px; font-weight:600; }
.field.is-error .error-msg{ display:block; }
.consent{ display:flex; gap:10px; align-items:flex-start; margin: 24px 0; }
.consent input{ width:20px; height:20px; margin-top:2px; flex-shrink:0; }
.hp-field{ position:absolute; left:-9999px; top:-9999px; }
.form-note{ font-size:.85rem; color: var(--ink-soft); }
.form-status{ padding:16px 18px; border-radius: var(--radius); margin-bottom:24px; font-weight:600; }
.form-status.success{ background: var(--success-bg); color: var(--success); border:1px solid #cfe4cf; }
.form-status.error{ background: var(--error-bg); color: var(--error); border:1px solid #f0d3cf; }
.form-frame{ border:2px solid var(--line); border-top:4px solid var(--orange); border-radius:var(--radius); padding:28px 24px 4px; margin:0 0 24px; background:#fff; }
fieldset{ border:none; border-top:1px solid var(--line); border-radius:0; padding:20px 0 4px; margin:0 0 8px; }
fieldset:first-of-type{ border-top:none; padding-top:0; }
legend{ font-weight:800; color:var(--navy-dark); padding:0; font-size:1.05rem; margin-bottom:4px; }

/* ===== Kontakt-Infos ===== */
.contact-info{ display:grid; gap:24px; grid-template-columns:1fr; }
@media (min-width:861px){ .contact-info{ grid-template-columns: 1fr 1fr; } }
.contact-block dt{ font-weight:700; color:var(--navy-dark); margin-top:14px; }
.contact-block dd{ margin:2px 0 0; }
.map-embed{ border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; }
.map-embed iframe{ width:100%; height:320px; border:0; display:block; }

/* ===== Footer ===== */
.site-footer{ background: var(--navy-dark); color:#cfdcea; padding: 44px 0 24px; }
.footer-grid{ display:grid; gap:28px; grid-template-columns:1fr; margin-bottom:28px; }
@media (min-width:640px){ .footer-grid{ grid-template-columns: repeat(3,1fr); } }
.site-footer h4{ color:#fff; font-size:1rem; margin-bottom:12px; }
.footer-logo-plate{ background:#fff; display:inline-block; padding:10px 16px; border-radius: var(--radius); margin-bottom:14px; }
.footer-logo-plate img{ height:34px; width:auto; }
.site-footer a{ color:#cfdcea; }
.site-footer a:hover{ color:#fff; }
.site-footer ul{ list-style:none; margin:0; padding:0; }
.site-footer li{ margin-bottom:8px; }
.footer-bottom{ border-top:1px solid rgba(255,255,255,.15); padding-top:18px; font-size:.85rem; display:flex; flex-wrap:wrap; gap:8px 20px; justify-content:space-between; color:#9fb3c8; }
.footer-bottom a{ color:#9fb3c8; }

/* ===== Utilities ===== */
.mt-0{ margin-top:0; } .mb-0{ margin-bottom:0; }
.stack > * + *{ margin-top:16px; }
.small{ font-size:.88rem; color: var(--ink-soft); }