/* Gemeinsames Stylesheet für Demo-Seiten – Riegger Elektroanlagen */
:root{
  --yellow:#FFD500;
  --red:#E30613;
  --red-dark:#B8050F;
  --black:#141414;
  --ink:#1c1c1c;
  --muted:#5a5a55;
  --line:#e8e6df;
  --bg:#ffffff;
  --bg-soft:#f7f6f2;
  --radius:6px;
  --shadow:0 10px 30px rgba(20,20,20,.10);
  --shadow-lg:0 18px 44px rgba(20,20,20,.16);
  --maxw:1180px;
  --font:'Inter','Segoe UI',system-ui,sans-serif;
  --font-display:'Archivo Black','Inter',sans-serif;
  /* Dunkles HMI-Farbschema */
  --hmi-bg:#10161f; --hmi-panel:#1b2431; --hmi-panel2:#232f42; --hmi-line:#31405a;
  --hmi-txt:#dfe7f3; --hmi-dim:#8296b3;
  --hmi-run:#35c66b; --hmi-mov:#ffb020; --hmi-alarm:#e5484d; --hmi-off:#46536b; --hmi-btn:#2a3a55;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{padding:72px 0}
h1,h2,h3{line-height:1.15;color:var(--black)}
h1,h2{font-family:var(--font-display);font-weight:400;letter-spacing:.01em;text-transform:uppercase}
h3{font-weight:800}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:.8rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--red);margin-bottom:14px}
.eyebrow::before{content:"";width:10px;height:10px;background:var(--red);flex:none}

.btn{display:inline-block;background:var(--black);color:var(--yellow);padding:14px 28px;font-weight:800;font-size:.95rem;text-transform:uppercase;letter-spacing:.05em;border:2px solid var(--black);transition:transform .15s,box-shadow .2s,background .2s;cursor:pointer;font-family:inherit}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-red{background:var(--red);border-color:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark);border-color:var(--red-dark)}
.btn-ghost{background:transparent;color:var(--black);border-color:var(--black)}
.btn-ghost:hover{background:var(--black);color:var(--yellow)}

.brand{display:flex;align-items:center;flex:none}
.logo-img{height:54px;width:auto;display:block}

.topbar{background:var(--black);color:#fff;font-size:.85rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px;gap:20px}
.topbar a{font-weight:600}
.topbar a:hover{color:var(--yellow)}
.topbar .tel{color:var(--yellow);font-weight:700}
header{position:sticky;top:0;z-index:50;background:var(--yellow);border-bottom:3px solid var(--black)}
.nav{display:flex;align-items:center;justify-content:space-between;height:82px;gap:20px}
nav ul{display:flex;gap:28px;list-style:none;align-items:center}
nav ul a{font-weight:700;font-size:.95rem;color:var(--black);text-transform:uppercase;letter-spacing:.03em;padding:6px 2px;border-bottom:3px solid transparent;transition:border-color .2s}
nav ul a:hover{border-color:var(--red)}
nav ul li:last-child a{border:none;padding:12px 22px}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:6px}
.menu-toggle span{width:26px;height:3px;background:var(--black);transition:.3s}

/* Intro-Banner */
.intro{background:var(--yellow);border-bottom:3px solid var(--black);padding:64px 0}
.intro h1{font-size:clamp(1.8rem,4.5vw,2.9rem);margin-bottom:14px}
.intro p{max-width:720px;font-size:1.08rem;color:#3a3a30}

/* Demo-Bereich */
.demo{background:var(--bg-soft)}
.demo-head{max-width:820px;margin:0 auto 32px;text-align:center}
.demo-head .eyebrow{justify-content:center}
.demo-head h2{font-size:clamp(1.4rem,3vw,2rem);margin-bottom:12px}
.demo-head p{color:var(--muted)}
.hmi-frame{background:var(--black);border:3px solid var(--black);border-top:6px solid var(--yellow);box-shadow:var(--shadow-lg);border-radius:var(--radius);overflow:hidden}
.hmi-bar{display:flex;align-items:center;gap:10px;background:var(--black);color:#cfcfc8;padding:10px 16px;font-size:.85rem}
.hmi-bar .dot{width:10px;height:10px;border-radius:50%;background:#35c66b;flex:none;box-shadow:0 0 6px #35c66b}
.hmi-bar .grow{flex:1}
.hmi-bar a{color:var(--yellow);font-weight:700}
.hmi-bar a:hover{text-decoration:underline}
.demo-hint{text-align:center;color:var(--muted);font-size:.92rem;margin-top:16px}

/* Weißer Rahmen (z. B. für Schaltpläne) */
.paper-frame{background:#fff;border:1px solid var(--line);border-top:6px solid var(--yellow);box-shadow:var(--shadow-lg);border-radius:var(--radius);overflow:hidden;padding:18px}

/* Merkmal-Karten */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.feat{background:#fff;border:1px solid var(--line);border-top:4px solid var(--yellow);border-radius:var(--radius);padding:28px 24px}
.feat h3{font-size:1.05rem;margin-bottom:8px}
.feat p{color:var(--muted);font-size:.95rem}

/* CTA */
.cta{background:var(--black);color:#fff;text-align:center;padding:64px 32px;border-top:6px solid var(--yellow)}
.cta h2{font-size:clamp(1.5rem,3.2vw,2.2rem);color:var(--yellow);margin-bottom:14px}
.cta p{color:#d6d6cf;font-size:1.05rem;margin-bottom:28px;max-width:620px;margin-left:auto;margin-right:auto}

footer.site{background:var(--black);color:#b9b9b2;padding:40px 0 30px}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.85rem}
footer.site a:hover{color:var(--yellow)}

/* Dunkle HMI-Panels in Demos */
.hmi-body{background:var(--hmi-bg);color:var(--hmi-txt);padding:22px;font-size:15px}
.hmi-body h4{color:var(--hmi-dim);font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px;font-weight:600}
.kpi-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:18px}
.kpi{background:var(--hmi-panel);border:1px solid var(--hmi-line);border-radius:8px;padding:12px 14px}
.kpi .k-lbl{font-size:.75rem;color:var(--hmi-dim);text-transform:uppercase;letter-spacing:.06em}
.kpi .k-val{font-size:1.5rem;font-weight:700;line-height:1.2}
.kpi .k-val small{font-size:.85rem;color:var(--hmi-dim);font-weight:600}
.hmi-btn{height:44px;padding:0 18px;font-size:15px;background:var(--hmi-btn);color:var(--hmi-txt);border:1px solid var(--hmi-line);border-radius:6px;cursor:pointer;font-family:inherit;font-weight:600}
.hmi-btn.act{background:#2f68b5;border-color:#4d8ada}
.hmi-btn.run{background:#2f8f57;border-color:var(--hmi-run);color:#fff}
.hmi-btn.stop{background:#5a2730;border-color:#8f3a46}

@media(max-width:920px){
  .feat-grid{grid-template-columns:1fr}
}
@media(max-width:680px){
  section{padding:56px 0}
  .topbar .wrap{justify-content:center}
  .topbar .addr{display:none}
  nav ul{position:fixed;inset:120px 0 auto 0;background:var(--yellow);flex-direction:column;gap:0;padding:8px 0;border-bottom:3px solid var(--black);box-shadow:var(--shadow);transform:translateY(-140%);transition:transform .3s;align-items:stretch;z-index:49}
  nav ul.open{transform:translateY(0)}
  nav ul li{padding:0 24px}
  nav ul li a{display:block;padding:14px 0;border-bottom:1px solid rgba(20,20,20,.15)}
  nav ul li:last-child{padding:14px 24px}
  .menu-toggle{display:flex}
  .logo-img{height:44px}
}