/* IRMÖ IT v2 | Gestaltungssystem (Brand Kit 8D) */
:root{
  --paper:#FAFBFC; --white:#FFFFFF; --ink:#0F1419; --graphite:#1F2937; --graphite-2:#374151;
  --steel:#4B5563; --fog:#9CA3AF; --line:#D1D7E0; --line-dk:#374151;
  --signal:#00E5E2; --signal-soft:#E6FCFC; --violet:#8B9DFF; --ok:#3DDC97;
  --font:var(--font-brand);
  --mono:var(--font-code);
  --max:1320px; --gut:clamp(20px,4vw,48px);
  --ease:cubic-bezier(.76,0,.24,1); --ease-out:cubic-bezier(.22,1,.36,1);
  --sec:clamp(96px,12vw,180px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--paper);color:var(--ink);font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:2px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.mono{font-family:var(--mono);letter-spacing:0}
.label{font-size:.85rem;color:var(--steel)}
.dark .label{color:var(--fog)}

/* Typo-Skala */
.t-hero{font-size:clamp(2.8rem,7.7vw,7.9rem);line-height:.96;letter-spacing:-.03em;font-weight:700}
.t-xl{font-size:clamp(2.2rem,5vw,4.8rem);line-height:1.02;letter-spacing:-.03em;font-weight:700}
.t-l{font-size:clamp(1.75rem,3.1vw,2.95rem);line-height:1.08;letter-spacing:-.03em;font-weight:650}
.t-m{font-size:clamp(1.3rem,1.9vw,1.75rem);line-height:1.2;letter-spacing:-.02em;font-weight:600}
.t-body{font-size:1.06rem;color:var(--steel);max-width:58ch}
.dark .t-body{color:var(--fog)}
p{max-width:66ch}
h1,h2,h3,h4,.t-hero,.t-xl,.t-l,.t-m{hyphens:manual;-webkit-hyphens:manual}

/* Raster-Hintergrund wie technische Zeichnung */
.grid-bg{background-image:linear-gradient(#E8ECF1 1px,transparent 1px),linear-gradient(90deg,#E8ECF1 1px,transparent 1px);background-size:56px 56px;background-position:center top}
.dark{background:var(--ink);color:#FAFBFC}
.dark.grid-bg{background-image:linear-gradient(#1F2937 1px,transparent 1px),linear-gradient(90deg,#1F2937 1px,transparent 1px)}
.sec{padding:var(--sec) 0}

/* Navigation */
.nav{position:fixed;inset:0 0 auto 0;z-index:50;padding-top:env(safe-area-inset-top,0px);transition:background .4s var(--ease),border-color .4s,color .3s;border-bottom:1px solid transparent}
.nav.solid{background:rgba(250,251,252,.88);backdrop-filter:saturate(1.4) blur(14px);border-color:var(--line)}
.nav.on-dark{color:#fff}
.nav.on-dark.solid{background:rgba(15,20,25,.86);border-color:var(--line-dk)}
.nav .wrap{display:flex;align-items:center;height:72px;gap:clamp(16px,2.2vw,32px)}
.brand{display:flex;align-items:center;font-size:25px;flex:none}
.brand .irm-logo.neg{display:none}
.nav.on-dark .brand .irm-logo:not(.neg){display:none}
.nav.on-dark .brand .irm-logo.neg{display:inline-flex}
.nav.on-dark .irm-logo{color:#fff}
.menu{display:flex;gap:clamp(16px,1.8vw,26px);margin-left:auto;font-size:.95rem;white-space:nowrap}
.menu a{position:relative;padding:6px 0;opacity:.82}
.menu a:hover,.menu a[aria-current=page]{opacity:1}
/* auf dunklen Abschnitten: Links hell genug, aktiv und Hover weiß */
.nav.on-dark:not(.menu-open) .menu a{opacity:1;color:#C9D0D5}
.nav.on-dark:not(.menu-open) .menu a:hover,.nav.on-dark:not(.menu-open) .menu a[aria-current=page]{color:#FFFFFF}
.menu a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:currentColor;transform:scaleX(0);transform-origin:right;transition:transform .45s var(--ease)}
.menu a:hover::after,.menu a[aria-current=page]::after{transform:scaleX(1);transform-origin:left}
.nav .menu a.m-only{display:none}
.pill{display:inline-flex;align-items:center;gap:10px;border-radius:8px;padding:12px 18px;font-weight:600;font-size:.95rem;border:1px solid currentColor;transition:background .35s var(--ease),color .35s,border-color .35s}
.pill:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.pill.solid{background:var(--ink);color:#fff;border-color:var(--ink)}
.pill.solid:hover{background:#1F2937;border-color:#1F2937}
.dark .pill:hover{background:#fff;color:var(--ink);border-color:#fff}
.dark .pill.solid{background:#fff;color:var(--ink);border-color:#fff}
.dark .pill.solid:hover{background:#E8ECF1;border-color:#E8ECF1}
/* Kopfzeilen-Schaltflächen: auf hell Graphit, auf dunkel Weiß */
.nav .pill{flex:none;white-space:nowrap;padding:10px 16px;font-size:.92rem}
.nav .nav-portal{background:transparent;color:var(--ink);border-color:var(--ink)}
.nav .nav-portal:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.nav .nav-kontakt,.nav .nav-kontakt:visited{background:var(--ink);color:#fff;border-color:var(--ink)}
.nav .nav-kontakt:hover{background:#1F2937;color:#fff;border-color:#1F2937}
.nav.on-dark .nav-portal{background:transparent;color:#fff;border-color:#fff}
.nav.on-dark .nav-portal:hover{background:#fff;color:var(--ink);border-color:#fff}
.nav.on-dark .nav-kontakt,.nav.on-dark .pill.solid.nav-kontakt{background:#fff;color:var(--ink);border-color:#fff}
.nav.on-dark .nav-kontakt:hover,.nav.on-dark .pill.solid.nav-kontakt:hover{background:#E8ECF1;color:var(--ink);border-color:#E8ECF1}
.nav .nav-portal + .nav-kontakt{margin-left:calc(12px - clamp(16px,2.2vw,32px))}
.burger{display:none;width:44px;height:44px;border-radius:8px;border:1px solid currentColor;background:none;align-items:center;justify-content:center;cursor:pointer;flex:none}
.burger svg{overflow:visible}
.burger path{transform-box:view-box;transform-origin:9px 9px;transition:transform .35s var(--ease)}
.nav.menu-open .burger .b1{transform:rotate(45deg) translateY(3px)}
.nav.menu-open .burger .b2{transform:rotate(-45deg) translateY(-3px)}
html.nav-lock,html.nav-lock body{overflow:hidden;overscroll-behavior:none}

/* Zwischen 1200 und 1439 px: etwas kompakter, damit nichts umbricht */
@media (max-width:1439px){
  .menu{font-size:.9rem}
}
/* Unter 1280 px: Menü hinter dem Burger (acht Menüpunkte seit dem Bereich Energie) */
@media (max-width:1279px){
  .menu{display:none}
  .burger{display:inline-flex;margin-left:auto}
  .nav .pill.hide-m{display:none}
  .nav.menu-open,.nav.menu-open.on-dark{color:var(--ink);background:var(--paper);border-color:var(--line);backdrop-filter:none;-webkit-backdrop-filter:none}
  .nav.menu-open .brand .irm-logo:not(.neg),.nav.menu-open.on-dark .brand .irm-logo:not(.neg){display:inline-flex}
  .nav.menu-open .brand .irm-logo.neg,.nav.menu-open.on-dark .brand .irm-logo.neg{display:none}
  .menu.open{display:flex;flex-direction:column;position:fixed;left:0;right:0;top:calc(72px + env(safe-area-inset-top,0px));height:calc(100vh - 72px - env(safe-area-inset-top,0px));height:calc(100dvh - 72px - env(safe-area-inset-top,0px));overflow-y:auto;overscroll-behavior:contain;background:var(--paper);color:var(--ink);padding:20px var(--gut) calc(32px + env(safe-area-inset-bottom,0px));gap:2px;font-size:1.3rem;border-top:1px solid var(--line);z-index:60;white-space:normal}
  .menu.open a{opacity:1;padding:12px 0;border-bottom:1px solid var(--line)}
  .menu.open a::after{display:none}
  .menu.open a[aria-current=page]{color:var(--ink);font-weight:600}
  .nav .menu a.m-only{display:block}
  .nav .menu.open a.m-only{margin-top:12px;border:1px solid var(--ink);border-radius:8px;padding:12px 18px;font-size:1.05rem;font-weight:600;text-align:center}
  .nav .menu.open a.m-only + a.m-only{margin-top:10px;background:var(--ink);color:#fff}
}


/* Bausteine */
/* Zeilen-Reveal: Maske lässt Unterlängen stehen */
/* Masken erhalten Raum für Umlautpunkte und Unterlängen; nach dem Reveal wird die Teilung wieder aufgehoben */
[data-reveal]>div,.split-line{padding-top:.1em;margin-top:-.1em;padding-bottom:.18em;margin-bottom:-.18em}
.rule{height:1px;background:var(--line);border:0}
.dark .rule{background:var(--line-dk)}
.split-line{display:block;overflow:hidden}
.t-hero,.t-xl,.t-l{padding-bottom:.02em}

/* Fuß */
.foot{background:var(--ink);color:#C9D0D5;padding:96px 0 32px;overflow:hidden}
.foot .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.foot h4{color:#fff;font-weight:600;font-size:.95rem;margin-bottom:14px}
.foot a{display:block;padding:4px 0;opacity:.75}.foot a:hover{opacity:1}
.foot .giant{margin:72px 0 24px;line-height:1;font-size:clamp(4rem,14vw,12rem);white-space:nowrap;overflow:hidden}
.foot .giant .irm-logo{font-size:1em}
.foot .legal{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line-dk);padding-top:20px;font-size:.82rem;opacity:.7}

@media (max-width:980px){
  .foot .cols{grid-template-columns:1fr 1fr}
  }
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}